[v4,04/13] LoongArch: ABI Implementation
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Commit Message
---
sysdeps/loongarch/__longjmp.S | 52 +++
sysdeps/loongarch/bits/endianness.h | 11 +
sysdeps/loongarch/bits/link.h | 58 +++
sysdeps/loongarch/bits/setjmp.h | 42 +++
sysdeps/loongarch/bsd-_setjmp.c | 1 +
sysdeps/loongarch/bsd-setjmp.c | 1 +
sysdeps/loongarch/dl-machine.h | 362 +++++++++++++++++++
sysdeps/loongarch/dl-trampoline.S | 91 +++++
sysdeps/loongarch/jmpbuf-offsets.h | 22 ++
sysdeps/loongarch/jmpbuf-unwind.h | 45 +++
sysdeps/loongarch/ldsodefs.h | 41 +++
sysdeps/loongarch/linkmap.h | 22 ++
sysdeps/loongarch/machine-gmon.h | 37 ++
sysdeps/loongarch/setjmp.S | 66 ++++
sysdeps/loongarch/sotruss-lib.c | 50 +++
sysdeps/loongarch/start.S | 67 ++++
sysdeps/loongarch/sys/asm.h | 59 +++
sysdeps/loongarch/tst-audit.h | 23 ++
sysdeps/unix/sysv/linux/loongarch/ldconfig.h | 26 ++
19 files changed, 1076 insertions(+)
create mode 100644 sysdeps/loongarch/__longjmp.S
create mode 100644 sysdeps/loongarch/bits/endianness.h
create mode 100644 sysdeps/loongarch/bits/link.h
create mode 100644 sysdeps/loongarch/bits/setjmp.h
create mode 100644 sysdeps/loongarch/bsd-_setjmp.c
create mode 100644 sysdeps/loongarch/bsd-setjmp.c
create mode 100644 sysdeps/loongarch/dl-machine.h
create mode 100644 sysdeps/loongarch/dl-trampoline.S
create mode 100644 sysdeps/loongarch/jmpbuf-offsets.h
create mode 100644 sysdeps/loongarch/jmpbuf-unwind.h
create mode 100644 sysdeps/loongarch/ldsodefs.h
create mode 100644 sysdeps/loongarch/linkmap.h
create mode 100644 sysdeps/loongarch/machine-gmon.h
create mode 100644 sysdeps/loongarch/setjmp.S
create mode 100644 sysdeps/loongarch/sotruss-lib.c
create mode 100644 sysdeps/loongarch/start.S
create mode 100644 sysdeps/loongarch/sys/asm.h
create mode 100644 sysdeps/loongarch/tst-audit.h
create mode 100644 sysdeps/unix/sysv/linux/loongarch/ldconfig.h
Comments
On 2022-05-09, caiyinyu wrote:
>---
> sysdeps/loongarch/__longjmp.S | 52 +++
> sysdeps/loongarch/bits/endianness.h | 11 +
> sysdeps/loongarch/bits/link.h | 58 +++
> sysdeps/loongarch/bits/setjmp.h | 42 +++
> sysdeps/loongarch/bsd-_setjmp.c | 1 +
> sysdeps/loongarch/bsd-setjmp.c | 1 +
> sysdeps/loongarch/dl-machine.h | 362 +++++++++++++++++++
> sysdeps/loongarch/dl-trampoline.S | 91 +++++
> sysdeps/loongarch/jmpbuf-offsets.h | 22 ++
> sysdeps/loongarch/jmpbuf-unwind.h | 45 +++
> sysdeps/loongarch/ldsodefs.h | 41 +++
> sysdeps/loongarch/linkmap.h | 22 ++
> sysdeps/loongarch/machine-gmon.h | 37 ++
> sysdeps/loongarch/setjmp.S | 66 ++++
> sysdeps/loongarch/sotruss-lib.c | 50 +++
> sysdeps/loongarch/start.S | 67 ++++
> sysdeps/loongarch/sys/asm.h | 59 +++
> sysdeps/loongarch/tst-audit.h | 23 ++
> sysdeps/unix/sysv/linux/loongarch/ldconfig.h | 26 ++
> 19 files changed, 1076 insertions(+)
> create mode 100644 sysdeps/loongarch/__longjmp.S
> create mode 100644 sysdeps/loongarch/bits/endianness.h
> create mode 100644 sysdeps/loongarch/bits/link.h
> create mode 100644 sysdeps/loongarch/bits/setjmp.h
> create mode 100644 sysdeps/loongarch/bsd-_setjmp.c
> create mode 100644 sysdeps/loongarch/bsd-setjmp.c
> create mode 100644 sysdeps/loongarch/dl-machine.h
> create mode 100644 sysdeps/loongarch/dl-trampoline.S
> create mode 100644 sysdeps/loongarch/jmpbuf-offsets.h
> create mode 100644 sysdeps/loongarch/jmpbuf-unwind.h
> create mode 100644 sysdeps/loongarch/ldsodefs.h
> create mode 100644 sysdeps/loongarch/linkmap.h
> create mode 100644 sysdeps/loongarch/machine-gmon.h
> create mode 100644 sysdeps/loongarch/setjmp.S
> create mode 100644 sysdeps/loongarch/sotruss-lib.c
> create mode 100644 sysdeps/loongarch/start.S
> create mode 100644 sysdeps/loongarch/sys/asm.h
> create mode 100644 sysdeps/loongarch/tst-audit.h
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/ldconfig.h
>
>diff --git a/sysdeps/loongarch/__longjmp.S b/sysdeps/loongarch/__longjmp.S
>new file mode 100644
>index 0000000000..b7690dd94f
>--- /dev/null
>+++ b/sysdeps/loongarch/__longjmp.S
>@@ -0,0 +1,52 @@
>+/* longjmp.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#include <sysdep.h>
>+#include <sys/asm.h>
>+
>+ENTRY (__longjmp)
>+ REG_L ra, a0, 0*SZREG
>+ REG_L sp, a0, 1*SZREG
>+ REG_L x, a0, 2*SZREG
>+ REG_L fp, a0, 3*SZREG
>+ REG_L s0, a0, 4*SZREG
>+ REG_L s1, a0, 5*SZREG
>+ REG_L s2, a0, 6*SZREG
>+ REG_L s3, a0, 7*SZREG
>+ REG_L s4, a0, 8*SZREG
>+ REG_L s5, a0, 9*SZREG
>+ REG_L s6, a0, 10*SZREG
>+ REG_L s7, a0, 11*SZREG
>+ REG_L s8, a0, 12*SZREG
>+
>+#ifndef __loongarch_soft_float
>+ FREG_L $f24, a0, 13*SZREG + 0*SZFREG
>+ FREG_L $f25, a0, 13*SZREG + 1*SZFREG
>+ FREG_L $f26, a0, 13*SZREG + 2*SZFREG
>+ FREG_L $f27, a0, 13*SZREG + 3*SZFREG
>+ FREG_L $f28, a0, 13*SZREG + 4*SZFREG
>+ FREG_L $f29, a0, 13*SZREG + 5*SZFREG
>+ FREG_L $f30, a0, 13*SZREG + 6*SZFREG
>+ FREG_L $f31, a0, 13*SZREG + 7*SZFREG
>+#endif
>+
>+ sltui a0,a1,1
>+ ADD a0, a0, a1 # a0 = (a1 == 0) ? 1 : a1
>+ jirl zero,ra,0
>+
>+END (__longjmp)
>diff --git a/sysdeps/loongarch/bits/endianness.h b/sysdeps/loongarch/bits/endianness.h
>new file mode 100644
>index 0000000000..7290be7b18
>--- /dev/null
>+++ b/sysdeps/loongarch/bits/endianness.h
>@@ -0,0 +1,11 @@
>+#ifndef _BITS_ENDIANNESS_H
>+#define _BITS_ENDIANNESS_H 1
>+
>+#ifndef _BITS_ENDIAN_H
>+#error "Never use <bits/endianness.h> directly; include <endian.h> instead."
>+#endif
>+
>+/* LoongArch is little-endian. */
>+#define __BYTE_ORDER __LITTLE_ENDIAN
>+
>+#endif /* bits/endianness.h */
>diff --git a/sysdeps/loongarch/bits/link.h b/sysdeps/loongarch/bits/link.h
>new file mode 100644
>index 0000000000..4df09989cb
>--- /dev/null
>+++ b/sysdeps/loongarch/bits/link.h
>@@ -0,0 +1,58 @@
>+/* Machine-specific declarations for dynamic linker interface.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#ifndef _LINK_H
>+#error "Never include <bits/link.h> directly; use <link.h> instead."
>+#endif
>+
>+typedef struct La_loongarch_regs
>+{
>+ unsigned long int lr_reg[8]; /* a0 - a7 */
>+ double lr_fpreg[8]; /* fa0 - fa7 */
>+ unsigned long int lr_ra;
>+ unsigned long int lr_sp;
>+} La_loongarch_regs;
>+
>+/* Return values for calls from PLT on LoongArch. */
>+typedef struct La_loongarch_retval
>+{
>+ unsigned long int lrv_a0;
>+ unsigned long int lrv_a1;
>+ double lrv_fa0;
>+ double lrv_fa1;
>+} La_loongarch_retval;
>+
>+__BEGIN_DECLS
>+
>+extern ElfW (Addr) la_loongarch_gnu_pltenter (ElfW (Sym) * __sym,
>+ unsigned int __ndx,
>+ uintptr_t *__refcook,
>+ uintptr_t *__defcook,
>+ La_loongarch_regs *__regs,
>+ unsigned int *__flags,
>+ const char *__symname,
>+ long int *__framesizep);
>+extern unsigned int la_loongarch_gnu_pltexit (ElfW (Sym) * __sym,
>+ unsigned int __ndx,
>+ uintptr_t *__refcook,
>+ uintptr_t *__defcook,
>+ const La_loongarch_regs *__inregs,
>+ La_loongarch_retval *__outregs,
>+ const char *__symname);
>+
>+__END_DECLS
>diff --git a/sysdeps/loongarch/bits/setjmp.h b/sysdeps/loongarch/bits/setjmp.h
>new file mode 100644
>index 0000000000..8b323ad2b6
>--- /dev/null
>+++ b/sysdeps/loongarch/bits/setjmp.h
>@@ -0,0 +1,42 @@
>+/* Define the machine-dependent type `jmp_buf'.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#ifndef _LOONGARCH_BITS_SETJMP_H
>+#define _LOONGARCH_BITS_SETJMP_H
>+
>+typedef struct __jmp_buf_internal_tag
>+{
>+ /* Program counter. */
>+ long int __pc;
>+ /* Stack pointer. */
>+ long int __sp;
>+ /* Reserved */
>+ long int __x;
>+ /* Frame pointer. */
>+ long int __fp;
>+ /* Callee-saved registers. */
>+ long int __regs[9];
>+
>+#ifndef __loongarch_soft_float
>+ /* Callee-saved floating point registers. */
>+ double __fpregs[8];
>+#endif
>+
>+} __jmp_buf[1];
>+
>+#endif /* _LOONGARCH_BITS_SETJMP_H */
>diff --git a/sysdeps/loongarch/bsd-_setjmp.c b/sysdeps/loongarch/bsd-_setjmp.c
>new file mode 100644
>index 0000000000..32f49441c3
>--- /dev/null
>+++ b/sysdeps/loongarch/bsd-_setjmp.c
>@@ -0,0 +1 @@
>+/* _setjmp is implemented in setjmp.S. */
>diff --git a/sysdeps/loongarch/bsd-setjmp.c b/sysdeps/loongarch/bsd-setjmp.c
>new file mode 100644
>index 0000000000..45fd802aac
>--- /dev/null
>+++ b/sysdeps/loongarch/bsd-setjmp.c
>@@ -0,0 +1 @@
>+/* setjmp is implemented in setjmp.S. */
>diff --git a/sysdeps/loongarch/dl-machine.h b/sysdeps/loongarch/dl-machine.h
>new file mode 100644
>index 0000000000..68b68e677d
>--- /dev/null
>+++ b/sysdeps/loongarch/dl-machine.h
>@@ -0,0 +1,362 @@
>+/* Machine-dependent ELF dynamic relocation inline functions.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#ifndef dl_machine_h
>+#define dl_machine_h
>+
>+#define ELF_MACHINE_NAME "LoongArch"
>+
>+#include <entry.h>
>+#include <elf/elf.h>
>+#include <sys/asm.h>
>+#include <dl-tls.h>
>+#include <dl-static-tls.h>
>+#include <dl-machine-rel.h>
>+
>+#ifndef _RTLD_PROLOGUE
>+# define _RTLD_PROLOGUE(entry) \
>+ ".globl\t" __STRING (entry) "\n\t" \
>+ ".type\t" __STRING (entry) ", @function\n\t" \
>+ CFI_STARTPROC "\n" \
>+ __STRING (entry) ":\n"
>+#endif
>+
>+#ifndef _RTLD_EPILOGUE
>+# define _RTLD_EPILOGUE(entry) \
>+ CFI_ENDPROC "\n\t" \
>+ ".size\t" __STRING (entry) ", . - " __STRING (entry) "\n"
>+#endif
>+
>+#define ELF_MACHINE_JMP_SLOT R_LARCH_JUMP_SLOT
>+#define ELF_MACHINE_IRELATIVE R_LARCH_IRELATIVE
>+
>+#define elf_machine_type_class(type) \
>+ ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \
>+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \
>+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \
>+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \
>+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \
>+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \
>+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \
>+ | (ELF_RTYPE_CLASS_COPY * ((type) == R_LARCH_COPY)))
>+
>+#define ELF_MACHINE_NO_REL 1
>+#define ELF_MACHINE_NO_RELA 0
>+
>+/* Return nonzero iff ELF header is compatible with the running host. */
>+static inline int __attribute_used__
>+elf_machine_matches_host (const ElfW (Ehdr) * ehdr)
>+{
>+ /* We can only run LoongArch binaries. */
>+ if (ehdr->e_machine != EM_LOONGARCH)
>+ return 0;
>+
>+ return 1;
>+}
>+
>+/* Runtime address of .got */
>+#define _GLOBAL_OFFSET_TABLE_ \
>+ ({ \
>+ ElfW (Addr) * r; \
>+ asm("la.pcrel %0, _GLOBAL_OFFSET_TABLE_" : "=r"(r)); \
>+ r; \
>+ })
>+
>+/* Return the link-time address of _DYNAMIC. */
>+static inline ElfW (Addr) elf_machine_dynamic (void)
>+{
>+ return _GLOBAL_OFFSET_TABLE_[0];
>+}
_GLOBAL_OFFSET_TABLE_[0] == link_time_dynamic is not recommended.
See
https://maskray.me/blog/2021-09-05-build-glibc-with-lld#global_offset_table_0
aarch64/riscv/x86_64/etc have been updated to use the preferred
approach.
>+#define STRINGXP(X) __STRING (X)
>+#define STRINGXV(X) STRINGV_ (X)
>+#define STRINGV_(...) #__VA_ARGS__
>+
>+/* Return the run-time load address of the shared object. */
>+static inline ElfW (Addr) elf_machine_load_address (void)
>+{
>+ ElfW (Addr) got_linktime_addr;
>+ asm("la.got %0, _GLOBAL_OFFSET_TABLE_"
>+ /* Link-time address in GOT entry before runtime relocation */
>+ : "=r"(got_linktime_addr));
>+ return (ElfW (Addr)) _GLOBAL_OFFSET_TABLE_ - got_linktime_addr;
>+}
>+
>+/* Initial entry point code for the dynamic linker.
>+ The C function `_dl_start' is the real entry point;
>+ its return value is the user program's entry point. */
>+
>+#define RTLD_START \
>+ asm(".text\n\
>+ " _RTLD_PROLOGUE (ENTRY_POINT) "\
>+ .cfi_label .Ldummy \n\
>+ " CFI_UNDEFINED (1) " \n\
>+ or $a0, $sp, $zero \n\
>+ bl _dl_start \n\
>+ # Stash user entry point in s0. \n\
>+ or $s0, $v0, $zero \n\
>+ # See if we were run as a command with the executable file \n\
>+ # name as an extra leading argument. \n\
>+ la $a0, _dl_skip_args \n\
>+ ld.w $a0, $a0, 0 \n\
>+ # Load the original argument count. \n\
>+ ld.d $a1, $sp, 0 \n\
>+ # Subtract _dl_skip_args from it. \n\
>+ sub.d $a1, $a1, $a0 \n\
>+ # Adjust the stack pointer to skip _dl_skip_args words. \n\
>+ slli.d $a0, $a0, 3 \n\
>+ add.d $sp, $sp, $a0 \n\
>+ # Save back the modified argument count. \n\
>+ st.d $a1, $sp, 0 \n\
>+ # Call _dl_init (struct link_map *main_map, int argc, char **argv, \
>+ char **env) \n\
>+ la $a0, _rtld_local \n\
>+ ld.d $a0, $a0, 0 \n\
>+ addi.d $a2, $sp, 8 \n\
>+ slli.d $a3, $a1, 3 \n\
>+ add.d $a3, $a3, $a2 \n\
>+ addi.d $a3, $a3, 8 \n\
>+ # Adjust $sp for 16-aligned \n\
>+ srli.d $t0, $sp, 4 \n\
>+ slli.d $t0, $t0, 4 \n\
>+ ori $t1, $sp, 0 \n\
>+ addi.d $sp, $t0, -32 \n\
>+ st.d $t1, $sp, 24 \n\
>+ # Call the function to run the initializers. \n\
>+ bl _dl_init \n\
>+ # Pass our finalizer function to _start. \n\
>+ ld.d $sp, $sp, 24 \n\
>+ la $a0, _dl_fini \n\
>+ # Jump to the user entry point. \n\
>+ jirl $zero, $s0, 0 \n\
>+ " _RTLD_EPILOGUE (ENTRY_POINT) "\
>+ .previous");
>+
>+/* Names of the architecture-specific auditing callback functions. */
>+#define ARCH_LA_PLTENTER loongarch_gnu_pltenter
>+#define ARCH_LA_PLTEXIT loongarch_gnu_pltexit
>+
>+/* Bias .got.plt entry by the offset requested by the PLT header. */
>+#define elf_machine_plt_value(map, reloc, value) (value)
>+
>+static inline ElfW (Addr)
>+ elf_machine_fixup_plt (struct link_map *map, lookup_t t,
>+ const ElfW (Sym) * refsym, const ElfW (Sym) * sym,
>+ const ElfW (Rela) * reloc, ElfW (Addr) * reloc_addr,
>+ ElfW (Addr) value)
>+{
>+ return *reloc_addr = value;
>+}
>+
>+#endif /* !dl_machine_h */
>+
>+#ifdef RESOLVE_MAP
>+
>+/* Perform a relocation described by R_INFO at the location pointed to
>+ by RELOC_ADDR. SYM is the relocation symbol specified by R_INFO and
>+ MAP is the object containing the reloc. */
>+
>+static inline void __attribute__ ((always_inline))
>+elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[],
>+ const ElfW (Rela) * reloc,
>+ const ElfW (Sym) * sym,
>+ const struct r_found_version *version,
>+ void *const reloc_addr, int skip_ifunc)
>+{
>+ ElfW (Addr) r_info = reloc->r_info;
>+ const unsigned long int r_type = ELFW (R_TYPE) (r_info);
>+ ElfW (Addr) *addr_field = (ElfW (Addr) *) reloc_addr;
>+ const ElfW (Sym) *const __attribute__ ((unused)) refsym = sym;
>+ struct link_map *sym_map = RESOLVE_MAP (map, scope, &sym, version, r_type);
>+ ElfW (Addr) value = 0;
>+ if (sym_map != NULL)
>+ value = SYMBOL_ADDRESS (sym_map, sym, true) + reloc->r_addend;
>+
>+ if (sym != NULL
>+ && __builtin_expect (ELFW (ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, 0)
>+ && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1)
>+ && __builtin_expect (!skip_ifunc, 1))
>+ value = ((ElfW (Addr) (*) (int)) value) (GLRO (dl_hwcap));
>+
>+ switch (r_type)
>+ {
>+#ifndef RTLD_BOOTSTRAP
>+ case __WORDSIZE == 64 ? R_LARCH_TLS_DTPMOD64:
>+ R_LARCH_TLS_DTPMOD32:
>+ if (sym_map)
>+ *addr_field = sym_map->l_tls_modid;
>+ break;
>+
>+ case __WORDSIZE == 64 ? R_LARCH_TLS_DTPREL64:
>+ R_LARCH_TLS_DTPREL32:
>+ if (sym != NULL)
>+ *addr_field = TLS_DTPREL_VALUE (sym) + reloc->r_addend;
>+ break;
>+
>+ case __WORDSIZE == 64 ? R_LARCH_TLS_TPREL64:
>+ R_LARCH_TLS_TPREL32:
>+ if (sym != NULL)
>+ {
>+ CHECK_STATIC_TLS (map, sym_map);
>+ *addr_field = TLS_TPREL_VALUE (sym_map, sym) + reloc->r_addend;
>+ }
>+ break;
>+
>+ case R_LARCH_COPY:
>+ {
>+ if (__glibc_unlikely (sym == NULL))
>+ /* This can happen in trace mode if an object could not be
>+ found. */
>+ break;
>+
>+ /* Handle TLS copy relocations. */
>+ if (__glibc_unlikely (ELFW (ST_TYPE) (sym->st_info) == STT_TLS))
>+ {
>+ /* There's nothing to do if the symbol is in .tbss. */
>+ if (__glibc_likely (sym->st_value
>+ >= sym_map->l_tls_initimage_size))
>+ break;
>+ value += (ElfW (Addr)) sym_map->l_tls_initimage - sym_map->l_addr;
>+ }
>+
>+ size_t size = sym->st_size;
>+ if (__glibc_unlikely (sym->st_size != refsym->st_size))
>+ {
>+ const char *strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
>+ if (sym->st_size > refsym->st_size)
>+ size = refsym->st_size;
>+ if (sym->st_size > refsym->st_size || GLRO (dl_verbose))
>+ _dl_error_printf ("\
>+ %s: Symbol `%s' has different size in shared object, consider re-linking\n",
>+ rtld_progname ?: "<program name unknown>",
>+ strtab + refsym->st_name);
>+ }
>+
>+ memcpy (reloc_addr, (void *) value, size);
>+ break;
>+ }
>+#endif
>+
>+#if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
>+ case R_LARCH_RELATIVE:
>+ {
>+#if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC
>+ /* This is defined in rtld.c, but nowhere in the static libc.a;
>+ make the reference weak so static programs can still link.
>+ This declaration cannot be done when compiling rtld.c
>+ (i.e. #ifdef RTLD_BOOTSTRAP) because rtld.c contains the
>+ common defn for _dl_rtld_map, which is incompatible with a
>+ weak decl in the same file. */
>+#ifndef SHARED
>+ weak_extern (GL (dl_rtld_map));
>+#endif
>+ if (map != &GL (dl_rtld_map)) /* Already done in rtld itself. */
>+#endif
>+ *addr_field = map->l_addr + reloc->r_addend;
>+ break;
>+ }
>+#endif
>+
>+ case R_LARCH_JUMP_SLOT:
>+ case __WORDSIZE == 64 ? R_LARCH_64:
>+ R_LARCH_32:
>+ *addr_field = value;
>+ break;
>+
>+ case R_LARCH_IRELATIVE:
>+ value = map->l_addr + reloc->r_addend;
>+ if (__glibc_likely (!skip_ifunc))
>+ value = ((ElfW (Addr) (*) (void)) value) ();
>+ *addr_field = value;
>+ break;
>+
>+ case R_LARCH_NONE:
>+ break;
>+
>+ default:
>+ _dl_reloc_bad_type (map, r_type, 0);
>+ break;
>+ }
>+}
>+
>+static inline void __attribute__ ((always_inline))
>+elf_machine_rela_relative (ElfW (Addr) l_addr, const ElfW (Rela) * reloc,
>+ void *const reloc_addr)
>+{
>+ *(ElfW (Addr) *) reloc_addr = l_addr + reloc->r_addend;
>+}
>+
>+static inline void __attribute__ ((always_inline))
>+elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem *scope[],
>+ ElfW (Addr) l_addr,
>+ const ElfW (Rela) * reloc, int skip_ifunc)
>+{
>+ ElfW (Addr) *const reloc_addr = (void *) (l_addr + reloc->r_offset);
>+ const unsigned int r_type = ELFW (R_TYPE) (reloc->r_info);
>+
>+ /* Check for unexpected PLT reloc type. */
>+ if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT))
>+ {
>+ if (__glibc_unlikely (map->l_mach.plt == 0))
>+ {
>+ if (l_addr)
>+ *reloc_addr += l_addr;
>+ }
>+ else
>+ *reloc_addr = map->l_mach.plt;
>+ }
>+ else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE))
>+ {
>+ ElfW (Addr) *value = (void *) (l_addr + reloc->r_addend);
>+ if (__glibc_likely (!skip_ifunc))
>+ value = (ElfW (Addr) *) ((ElfW (Addr) (*) (void)) value) ();
>+ *reloc_addr = (ElfW (Addr)) value;
>+ }
>+ else
>+ _dl_reloc_bad_type (map, r_type, 1);
>+}
>+
>+/* Set up the loaded object described by L so its stub function
>+ will jump to the on-demand fixup code __dl_runtime_resolve. */
>+
>+static inline int __attribute__ ((always_inline))
>+elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[],
>+ int lazy, int profile)
>+{
>+#ifndef RTLD_BOOTSTRAP
>+ /* If using PLTs, fill in the first two entries of .got.plt. */
>+ if (l->l_info[DT_JMPREL])
>+ {
>+ extern void _dl_runtime_resolve (void)
>+ __attribute__ ((visibility ("hidden")));
>+ ElfW (Addr) *gotplt = (ElfW (Addr) *) D_PTR (l, l_info[DT_PLTGOT]);
>+ /* If a library is prelinked but we have to relocate anyway,
>+ we have to be able to undo the prelinking of .got.plt.
>+ The prelinker saved the address of .plt for us here. */
>+ if (gotplt[1])
>+ l->l_mach.plt = gotplt[1] + l->l_addr;
>+ gotplt[0] = (ElfW (Addr)) & _dl_runtime_resolve;
>+ gotplt[1] = (ElfW (Addr)) l;
>+ }
>+#endif
>+
>+ return lazy;
>+}
>+
>+#endif /* RESOLVE_MAP */
>diff --git a/sysdeps/loongarch/dl-trampoline.S b/sysdeps/loongarch/dl-trampoline.S
>new file mode 100644
>index 0000000000..eb610392f6
>--- /dev/null
>+++ b/sysdeps/loongarch/dl-trampoline.S
>@@ -0,0 +1,91 @@
>+/* PLT trampolines.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#include <sysdep.h>
>+#include <sys/asm.h>
>+
>+/* Assembler veneer called from the PLT header code for lazy loading.
>+ The PLT header passes its own args in t0-t2. */
>+
>+#ifdef __loongarch_soft_float
>+# define FRAME_SIZE (-((-10 * SZREG) & ALMASK))
>+#else
>+# define FRAME_SIZE (-((-10 * SZREG - 8 * SZFREG) & ALMASK))
>+#endif
>+
>+ENTRY (_dl_runtime_resolve)
>+
>+ /* Save arguments to stack. */
>+ ADDI sp, sp, -FRAME_SIZE
>+
>+ REG_S ra, sp, 9*SZREG
>+ REG_S a0, sp, 1*SZREG
>+ REG_S a1, sp, 2*SZREG
>+ REG_S a2, sp, 3*SZREG
>+ REG_S a3, sp, 4*SZREG
>+ REG_S a4, sp, 5*SZREG
>+ REG_S a5, sp, 6*SZREG
>+ REG_S a6, sp, 7*SZREG
>+ REG_S a7, sp, 8*SZREG
>+
>+#ifndef __loongarch_soft_float
>+ FREG_S fa0, sp, 10*SZREG + 0*SZFREG
>+ FREG_S fa1, sp, 10*SZREG + 1*SZFREG
>+ FREG_S fa2, sp, 10*SZREG + 2*SZFREG
>+ FREG_S fa3, sp, 10*SZREG + 3*SZFREG
>+ FREG_S fa4, sp, 10*SZREG + 4*SZFREG
>+ FREG_S fa5, sp, 10*SZREG + 5*SZFREG
>+ FREG_S fa6, sp, 10*SZREG + 6*SZFREG
>+ FREG_S fa7, sp, 10*SZREG + 7*SZFREG
>+#endif
>+
>+ /* Update .got.plt and obtain runtime address of callee */
>+ SLLI a1, t1, 1
>+ or a0, t0, zero
>+ ADD a1, a1, t1
>+ la a2, _dl_fixup
>+ jirl ra, a2, 0
>+ or t1, v0, zero
>+
>+ /* Restore arguments from stack. */
>+ REG_L ra, sp, 9*SZREG
>+ REG_L a0, sp, 1*SZREG
>+ REG_L a1, sp, 2*SZREG
>+ REG_L a2, sp, 3*SZREG
>+ REG_L a3, sp, 4*SZREG
>+ REG_L a4, sp, 5*SZREG
>+ REG_L a5, sp, 6*SZREG
>+ REG_L a6, sp, 7*SZREG
>+ REG_L a7, sp, 8*SZREG
>+
>+#ifndef __loongarch_soft_float
>+ FREG_L fa0, sp, 10*SZREG + 0*SZFREG
>+ FREG_L fa1, sp, 10*SZREG + 1*SZFREG
>+ FREG_L fa2, sp, 10*SZREG + 2*SZFREG
>+ FREG_L fa3, sp, 10*SZREG + 3*SZFREG
>+ FREG_L fa4, sp, 10*SZREG + 4*SZFREG
>+ FREG_L fa5, sp, 10*SZREG + 5*SZFREG
>+ FREG_L fa6, sp, 10*SZREG + 6*SZFREG
>+ FREG_L fa7, sp, 10*SZREG + 7*SZFREG
>+#endif
>+
>+ ADDI sp, sp, FRAME_SIZE
>+
>+ /* Invoke the callee. */
>+ jirl zero, t1, 0
>+END (_dl_runtime_resolve)
>diff --git a/sysdeps/loongarch/jmpbuf-offsets.h b/sysdeps/loongarch/jmpbuf-offsets.h
>new file mode 100644
>index 0000000000..a4b8ea690e
>--- /dev/null
>+++ b/sysdeps/loongarch/jmpbuf-offsets.h
>@@ -0,0 +1,22 @@
>+/* Private macros for accessing __jmp_buf contents.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public License as
>+ published by the Free Software Foundation; either version 2.1 of the
>+ License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#include <jmpbuf-unwind.h>
>+
>+/* Helper for generic ____longjmp_chk(). */
>+#define JB_FRAME_ADDRESS(buf) ((void *) _jmpbuf_sp (buf))
>diff --git a/sysdeps/loongarch/jmpbuf-unwind.h b/sysdeps/loongarch/jmpbuf-unwind.h
>new file mode 100644
>index 0000000000..6fa509151d
>--- /dev/null
>+++ b/sysdeps/loongarch/jmpbuf-unwind.h
>@@ -0,0 +1,45 @@
>+/* Examine __jmp_buf for unwinding frames.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#include <setjmp.h>
>+#include <stdint.h>
>+#include <unwind.h>
>+#include <sysdep.h>
>+
>+/* Test if longjmp to JMPBUF would unwind the frame
>+ containing a local variable at ADDRESS. */
>+#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \
>+ ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp))
>+
>+#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
>+ _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
>+
>+static inline uintptr_t __attribute__ ((unused)) _jmpbuf_sp (__jmp_buf regs)
>+{
>+ uintptr_t sp = regs[0].__sp;
>+#ifdef PTR_DEMANGLE
>+ PTR_DEMANGLE (sp);
>+#endif
>+ return sp;
>+}
>+
>+#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
>+ ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
>+
>+/* We use the normal longjmp for unwinding. */
>+#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)
>diff --git a/sysdeps/loongarch/ldsodefs.h b/sysdeps/loongarch/ldsodefs.h
>new file mode 100644
>index 0000000000..36b1b25b9f
>--- /dev/null
>+++ b/sysdeps/loongarch/ldsodefs.h
>@@ -0,0 +1,41 @@
>+/* Run-time dynamic linker data structures for loaded ELF shared objects.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#ifndef _LOONGARCH_LDSODEFS_H
>+#define _LOONGARCH_LDSODEFS_H 1
>+
>+#include <elf.h>
>+
>+struct La_loongarch_regs;
>+struct La_loongarch_retval;
>+
>+#define ARCH_PLTENTER_MEMBERS \
>+ ElfW (Addr) (*loongarch_gnu_pltenter) (ElfW (Sym) *, unsigned int, \
>+ uintptr_t *, uintptr_t *, \
>+ const struct La_loongarch_regs *, \
>+ unsigned int *, const char *name, \
>+ long int *framesizep);
>+
>+#define ARCH_PLTEXIT_MEMBERS \
>+ unsigned int (*loongarch_gnu_pltexit) (ElfW (Sym) *, unsigned int, \
>+ uintptr_t *, uintptr_t *, const struct La_loongarch_regs *, \
>+ struct La_loongarch_retval *, const char *);
>+
>+#include_next <ldsodefs.h>
>+
>+#endif
>diff --git a/sysdeps/loongarch/linkmap.h b/sysdeps/loongarch/linkmap.h
>new file mode 100644
>index 0000000000..bbba73ed70
>--- /dev/null
>+++ b/sysdeps/loongarch/linkmap.h
>@@ -0,0 +1,22 @@
>+/* Definition of link_map_machine.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+struct link_map_machine
>+{
>+ ElfW (Addr) plt; /* Address of .plt. */
>+};
>diff --git a/sysdeps/loongarch/machine-gmon.h b/sysdeps/loongarch/machine-gmon.h
>new file mode 100644
>index 0000000000..4a3cdd964e
>--- /dev/null
>+++ b/sysdeps/loongarch/machine-gmon.h
>@@ -0,0 +1,37 @@
>+/* LoongArch definitions for profiling support.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library; if not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+/* Accept 'frompc' address as argument from the function that calls
>+ _mcount for profiling. Use __builtin_return_address (0)
>+ for the 'selfpc' address. */
>+
>+#include <sysdep.h>
>+
>+static void mcount_internal (unsigned long int frompc,
>+ unsigned long int selfpc);
>+
>+#define _MCOUNT_DECL(frompc, selfpc) \
>+ static inline void mcount_internal (unsigned long int frompc, \
>+ unsigned long int selfpc)
>+
>+#define MCOUNT \
>+ void _mcount (void *frompc) \
>+ { \
>+ mcount_internal ((unsigned long int) frompc, \
>+ (unsigned long int) RETURN_ADDRESS (0)); \
>+ }
>diff --git a/sysdeps/loongarch/setjmp.S b/sysdeps/loongarch/setjmp.S
>new file mode 100644
>index 0000000000..b93ae2f5da
>--- /dev/null
>+++ b/sysdeps/loongarch/setjmp.S
>@@ -0,0 +1,66 @@
>+/* setjmp for LoongArch.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#include <sysdep.h>
>+#include <sys/asm.h>
>+
>+ENTRY (_setjmp)
>+ li.w a1,0
>+ b __sigsetjmp
>+END (_setjmp)
>+
>+ENTRY (setjmp)
>+ li.w a1,1
>+END (setjmp)
>+
>+ENTRY (__sigsetjmp)
>+ REG_S ra, a0, 0*SZREG
>+ REG_S sp, a0, 1*SZREG
>+ REG_S x, a0, 2*SZREG
>+ REG_S fp, a0, 3*SZREG
>+ REG_S s0, a0, 4*SZREG
>+ REG_S s1, a0, 5*SZREG
>+ REG_S s2, a0, 6*SZREG
>+ REG_S s3, a0, 7*SZREG
>+ REG_S s4, a0, 8*SZREG
>+ REG_S s5, a0, 9*SZREG
>+ REG_S s6, a0, 10*SZREG
>+ REG_S s7, a0, 11*SZREG
>+ REG_S s8, a0, 12*SZREG
>+
>+#ifndef __loongarch_soft_float
>+ FREG_S $f24, a0, 13*SZREG + 0*SZFREG
>+ FREG_S $f25, a0, 13*SZREG + 1*SZFREG
>+ FREG_S $f26, a0, 13*SZREG + 2*SZFREG
>+ FREG_S $f27, a0, 13*SZREG + 3*SZFREG
>+ FREG_S $f28, a0, 13*SZREG + 4*SZFREG
>+ FREG_S $f29, a0, 13*SZREG + 5*SZFREG
>+ FREG_S $f30, a0, 13*SZREG + 6*SZFREG
>+ FREG_S $f31, a0, 13*SZREG + 7*SZFREG
>+#endif
>+
>+#if !IS_IN (libc) && IS_IN(rtld)
>+ li.w v0, 0
>+ jirl zero,ra,0
>+#else
>+ b __sigjmp_save
>+#endif
>+END (__sigsetjmp)
>+
>+hidden_def (__sigsetjmp)
>+weak_alias (_setjmp, __GI__setjmp)
>diff --git a/sysdeps/loongarch/sotruss-lib.c b/sysdeps/loongarch/sotruss-lib.c
>new file mode 100644
>index 0000000000..5b15f4815a
>--- /dev/null
>+++ b/sysdeps/loongarch/sotruss-lib.c
>@@ -0,0 +1,50 @@
>+/* Override generic sotruss-lib.c to define actual functions for LoongArch.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#define HAVE_ARCH_PLTENTER
>+#define HAVE_ARCH_PLTEXIT
>+
>+#include <elf/sotruss-lib.c>
>+
>+ElfW (Addr)
>+la_loongarch_gnu_pltenter (ElfW (Sym) * sym __attribute__ ((unused)),
>+ unsigned int ndx __attribute__ ((unused)),
>+ uintptr_t *refcook, uintptr_t *defcook,
>+ La_loongarch_regs *regs, unsigned int *flags,
>+ const char *symname, long int *framesizep)
>+{
>+ print_enter (refcook, defcook, symname, regs->lr_reg[0], regs->lr_reg[1],
>+ regs->lr_reg[2], *flags);
>+
>+ /* No need to copy anything, we will not need the parameters in any case. */
>+ *framesizep = 0;
>+
>+ return sym->st_value;
>+}
>+
>+unsigned int
>+la_loongarch_gnu_pltexit (ElfW (Sym) * sym, unsigned int ndx,
>+ uintptr_t *refcook, uintptr_t *defcook,
>+ const struct La_loongarch_regs *inregs,
>+ struct La_loongarch_retval *outregs,
>+ const char *symname)
>+{
>+ print_exit (refcook, defcook, symname, outregs->lrv_a0);
>+
>+ return 0;
>+}
>diff --git a/sysdeps/loongarch/start.S b/sysdeps/loongarch/start.S
>new file mode 100644
>index 0000000000..a9b32aa966
>--- /dev/null
>+++ b/sysdeps/loongarch/start.S
>@@ -0,0 +1,67 @@
>+/* Startup code compliant to the ELF LoongArch ABI.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#define __ASSEMBLY__ 1
>+#include <entry.h>
>+#include <sys/asm.h>
>+
>+/* The entry point's job is to call __libc_start_main. Per the ABI,
>+ a0 contains the address of a function to be passed to atexit.
>+ __libc_start_main wants this in a5. */
>+
>+/*
>+int
>+__libc_start_main (int (*main) (int, char **, char **),
>+ int argc,
>+ char **argv,
>+ __typeof (main) init,
>+ void (*fini) (void),
>+ void (*rtld_fini) (void),
>+ void *stack_end);
>+ */
>+
>+ENTRY (ENTRY_POINT)
>+
>+/* Terminate call stack by noting ra is undefined. Use a dummy
>+ .cfi_label to force starting the FDE. */
>+ .cfi_label .Ldummy
>+ cfi_undefined (1)
>+ or a5, a0, zero /* rtld_fini */
>+
>+/* We must get symbol main through GOT table, since main may not be local.
>+ For instance: googletest defines main in dynamic library. */
>+ la.got a0, t0, main
>+ REG_L a1, sp, 0
>+ ADDI a2, sp, SZREG
>+
>+ /* Adjust $sp for 16-aligned */
>+ SRLI sp, sp, 4
>+ SLLI sp, sp, 4
>+
>+ move a3, zero /* used to be init */
>+ move a4, zero /* used to be fini */
>+ or a6, sp, zero /* stack_end */
>+
>+ la.got ra, t0, __libc_start_main
>+ jirl ra, ra, 0
>+
>+ la.got ra, t0, abort
>+ jirl ra, ra, 0
>+END (ENTRY_POINT)
>+
>diff --git a/sysdeps/loongarch/sys/asm.h b/sysdeps/loongarch/sys/asm.h
>new file mode 100644
>index 0000000000..b41ee59694
>--- /dev/null
>+++ b/sysdeps/loongarch/sys/asm.h
>@@ -0,0 +1,59 @@
>+/* Miscellaneous macros.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#ifndef _SYS_ASM_H
>+#define _SYS_ASM_H
>+
>+#include <sys/regdef.h>
>+#include <sysdeps/generic/sysdep.h>
>+
>+/* Macros to handle different pointer/register sizes for 32/64-bit code. */
>+#define SZREG 8
>+#define SZFREG 8
>+#define REG_L ld.d
>+#define REG_S st.d
>+#define SRLI srli.d
>+#define SLLI slli.d
>+#define ADDI addi.d
>+#define ADD add.d
>+#define BSTRINS bstrins.d
>+#define LI li.d
>+#define FREG_L fld.d
>+#define FREG_S fst.d
>+
>+/* Declare leaf routine. */
>+#define LEAF(symbol) \
>+ .text; \
>+ .globl symbol; \
>+ .align 3; \
>+ cfi_startproc; \
>+ .type symbol, @function; \
>+ symbol:
>+
>+#define ENTRY(symbol) LEAF (symbol)
>+
>+/* Mark end of function. */
>+#undef END
>+#define END(function) \
>+ cfi_endproc; \
>+ .size function, .- function;
>+
>+/* Stack alignment. */
>+#define ALMASK ~15
>+
>+#endif /* sys/asm.h */
>diff --git a/sysdeps/loongarch/tst-audit.h b/sysdeps/loongarch/tst-audit.h
>new file mode 100644
>index 0000000000..e71948c86e
>--- /dev/null
>+++ b/sysdeps/loongarch/tst-audit.h
>@@ -0,0 +1,23 @@
>+/* Definitions for testing PLT entry/exit auditing.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#define pltenter la_loongarch_gnu_pltenter
>+#define pltexit la_loongarch_gnu_pltexit
>+#define La_regs La_loongarch_regs
>+#define La_retval La_loongarch_retval
>+#define int_retval lrv_a0
>diff --git a/sysdeps/unix/sysv/linux/loongarch/ldconfig.h b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h
>new file mode 100644
>index 0000000000..4887c30ca2
>--- /dev/null
>+++ b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h
>@@ -0,0 +1,26 @@
>+/* ldconfig default paths and libraries.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <http://www.gnu.org/licenses/>. */
>+
>+#include <sysdeps/generic/ldconfig.h>
>+
>+#define SYSDEP_KNOWN_INTERPRETER_NAMES \
>+ { "/lib64/ld-linux-loongarch-lp64d.so.1", FLAG_ELF_LIBC6 },
>+
>+#define SYSDEP_KNOWN_LIBRARY_NAMES \
>+ { "libc.so.6", FLAG_ELF_LIBC6 }, \
>+ { "libm.so.6", FLAG_ELF_LIBC6 },
>--
>2.31.1
>
On 2022-05-09, caiyinyu wrote:
>---
> sysdeps/loongarch/__longjmp.S | 52 +++
> sysdeps/loongarch/bits/endianness.h | 11 +
> sysdeps/loongarch/bits/link.h | 58 +++
> sysdeps/loongarch/bits/setjmp.h | 42 +++
> sysdeps/loongarch/bsd-_setjmp.c | 1 +
> sysdeps/loongarch/bsd-setjmp.c | 1 +
> sysdeps/loongarch/dl-machine.h | 362 +++++++++++++++++++
> sysdeps/loongarch/dl-trampoline.S | 91 +++++
> sysdeps/loongarch/jmpbuf-offsets.h | 22 ++
> sysdeps/loongarch/jmpbuf-unwind.h | 45 +++
> sysdeps/loongarch/ldsodefs.h | 41 +++
> sysdeps/loongarch/linkmap.h | 22 ++
> sysdeps/loongarch/machine-gmon.h | 37 ++
> sysdeps/loongarch/setjmp.S | 66 ++++
> sysdeps/loongarch/sotruss-lib.c | 50 +++
> sysdeps/loongarch/start.S | 67 ++++
> sysdeps/loongarch/sys/asm.h | 59 +++
> sysdeps/loongarch/tst-audit.h | 23 ++
> sysdeps/unix/sysv/linux/loongarch/ldconfig.h | 26 ++
> 19 files changed, 1076 insertions(+)
> create mode 100644 sysdeps/loongarch/__longjmp.S
> create mode 100644 sysdeps/loongarch/bits/endianness.h
> create mode 100644 sysdeps/loongarch/bits/link.h
> create mode 100644 sysdeps/loongarch/bits/setjmp.h
> create mode 100644 sysdeps/loongarch/bsd-_setjmp.c
> create mode 100644 sysdeps/loongarch/bsd-setjmp.c
> create mode 100644 sysdeps/loongarch/dl-machine.h
> create mode 100644 sysdeps/loongarch/dl-trampoline.S
> create mode 100644 sysdeps/loongarch/jmpbuf-offsets.h
> create mode 100644 sysdeps/loongarch/jmpbuf-unwind.h
> create mode 100644 sysdeps/loongarch/ldsodefs.h
> create mode 100644 sysdeps/loongarch/linkmap.h
> create mode 100644 sysdeps/loongarch/machine-gmon.h
> create mode 100644 sysdeps/loongarch/setjmp.S
> create mode 100644 sysdeps/loongarch/sotruss-lib.c
> create mode 100644 sysdeps/loongarch/start.S
> create mode 100644 sysdeps/loongarch/sys/asm.h
> create mode 100644 sysdeps/loongarch/tst-audit.h
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/ldconfig.h
>
>diff --git a/sysdeps/loongarch/__longjmp.S b/sysdeps/loongarch/__longjmp.S
>new file mode 100644
>index 0000000000..b7690dd94f
>--- /dev/null
>+++ b/sysdeps/loongarch/__longjmp.S
>@@ -0,0 +1,52 @@
>+/* longjmp.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#include <sysdep.h>
>+#include <sys/asm.h>
>+
>+ENTRY (__longjmp)
>+ REG_L ra, a0, 0*SZREG
>+ REG_L sp, a0, 1*SZREG
>+ REG_L x, a0, 2*SZREG
>+ REG_L fp, a0, 3*SZREG
>+ REG_L s0, a0, 4*SZREG
>+ REG_L s1, a0, 5*SZREG
>+ REG_L s2, a0, 6*SZREG
>+ REG_L s3, a0, 7*SZREG
>+ REG_L s4, a0, 8*SZREG
>+ REG_L s5, a0, 9*SZREG
>+ REG_L s6, a0, 10*SZREG
>+ REG_L s7, a0, 11*SZREG
>+ REG_L s8, a0, 12*SZREG
>+
>+#ifndef __loongarch_soft_float
>+ FREG_L $f24, a0, 13*SZREG + 0*SZFREG
>+ FREG_L $f25, a0, 13*SZREG + 1*SZFREG
>+ FREG_L $f26, a0, 13*SZREG + 2*SZFREG
>+ FREG_L $f27, a0, 13*SZREG + 3*SZFREG
>+ FREG_L $f28, a0, 13*SZREG + 4*SZFREG
>+ FREG_L $f29, a0, 13*SZREG + 5*SZFREG
>+ FREG_L $f30, a0, 13*SZREG + 6*SZFREG
>+ FREG_L $f31, a0, 13*SZREG + 7*SZFREG
>+#endif
>+
>+ sltui a0,a1,1
>+ ADD a0, a0, a1 # a0 = (a1 == 0) ? 1 : a1
>+ jirl zero,ra,0
>+
>+END (__longjmp)
>diff --git a/sysdeps/loongarch/bits/endianness.h b/sysdeps/loongarch/bits/endianness.h
>new file mode 100644
>index 0000000000..7290be7b18
>--- /dev/null
>+++ b/sysdeps/loongarch/bits/endianness.h
>@@ -0,0 +1,11 @@
>+#ifndef _BITS_ENDIANNESS_H
>+#define _BITS_ENDIANNESS_H 1
>+
>+#ifndef _BITS_ENDIAN_H
>+#error "Never use <bits/endianness.h> directly; include <endian.h> instead."
>+#endif
>+
>+/* LoongArch is little-endian. */
>+#define __BYTE_ORDER __LITTLE_ENDIAN
>+
>+#endif /* bits/endianness.h */
>diff --git a/sysdeps/loongarch/bits/link.h b/sysdeps/loongarch/bits/link.h
>new file mode 100644
>index 0000000000..4df09989cb
>--- /dev/null
>+++ b/sysdeps/loongarch/bits/link.h
>@@ -0,0 +1,58 @@
>+/* Machine-specific declarations for dynamic linker interface.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#ifndef _LINK_H
>+#error "Never include <bits/link.h> directly; use <link.h> instead."
>+#endif
>+
>+typedef struct La_loongarch_regs
>+{
>+ unsigned long int lr_reg[8]; /* a0 - a7 */
>+ double lr_fpreg[8]; /* fa0 - fa7 */
>+ unsigned long int lr_ra;
>+ unsigned long int lr_sp;
>+} La_loongarch_regs;
>+
>+/* Return values for calls from PLT on LoongArch. */
>+typedef struct La_loongarch_retval
>+{
>+ unsigned long int lrv_a0;
>+ unsigned long int lrv_a1;
>+ double lrv_fa0;
>+ double lrv_fa1;
>+} La_loongarch_retval;
>+
>+__BEGIN_DECLS
>+
>+extern ElfW (Addr) la_loongarch_gnu_pltenter (ElfW (Sym) * __sym,
>+ unsigned int __ndx,
>+ uintptr_t *__refcook,
>+ uintptr_t *__defcook,
>+ La_loongarch_regs *__regs,
>+ unsigned int *__flags,
>+ const char *__symname,
>+ long int *__framesizep);
>+extern unsigned int la_loongarch_gnu_pltexit (ElfW (Sym) * __sym,
>+ unsigned int __ndx,
>+ uintptr_t *__refcook,
>+ uintptr_t *__defcook,
>+ const La_loongarch_regs *__inregs,
>+ La_loongarch_retval *__outregs,
>+ const char *__symname);
>+
>+__END_DECLS
>diff --git a/sysdeps/loongarch/bits/setjmp.h b/sysdeps/loongarch/bits/setjmp.h
>new file mode 100644
>index 0000000000..8b323ad2b6
>--- /dev/null
>+++ b/sysdeps/loongarch/bits/setjmp.h
>@@ -0,0 +1,42 @@
>+/* Define the machine-dependent type `jmp_buf'.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#ifndef _LOONGARCH_BITS_SETJMP_H
>+#define _LOONGARCH_BITS_SETJMP_H
>+
>+typedef struct __jmp_buf_internal_tag
>+{
>+ /* Program counter. */
>+ long int __pc;
>+ /* Stack pointer. */
>+ long int __sp;
>+ /* Reserved */
>+ long int __x;
>+ /* Frame pointer. */
>+ long int __fp;
>+ /* Callee-saved registers. */
>+ long int __regs[9];
>+
>+#ifndef __loongarch_soft_float
>+ /* Callee-saved floating point registers. */
>+ double __fpregs[8];
>+#endif
>+
>+} __jmp_buf[1];
>+
>+#endif /* _LOONGARCH_BITS_SETJMP_H */
>diff --git a/sysdeps/loongarch/bsd-_setjmp.c b/sysdeps/loongarch/bsd-_setjmp.c
>new file mode 100644
>index 0000000000..32f49441c3
>--- /dev/null
>+++ b/sysdeps/loongarch/bsd-_setjmp.c
>@@ -0,0 +1 @@
>+/* _setjmp is implemented in setjmp.S. */
>diff --git a/sysdeps/loongarch/bsd-setjmp.c b/sysdeps/loongarch/bsd-setjmp.c
>new file mode 100644
>index 0000000000..45fd802aac
>--- /dev/null
>+++ b/sysdeps/loongarch/bsd-setjmp.c
>@@ -0,0 +1 @@
>+/* setjmp is implemented in setjmp.S. */
>diff --git a/sysdeps/loongarch/dl-machine.h b/sysdeps/loongarch/dl-machine.h
>new file mode 100644
>index 0000000000..68b68e677d
>--- /dev/null
>+++ b/sysdeps/loongarch/dl-machine.h
>@@ -0,0 +1,362 @@
>+/* Machine-dependent ELF dynamic relocation inline functions.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#ifndef dl_machine_h
>+#define dl_machine_h
>+
>+#define ELF_MACHINE_NAME "LoongArch"
>+
>+#include <entry.h>
>+#include <elf/elf.h>
>+#include <sys/asm.h>
>+#include <dl-tls.h>
>+#include <dl-static-tls.h>
>+#include <dl-machine-rel.h>
>+
>+#ifndef _RTLD_PROLOGUE
>+# define _RTLD_PROLOGUE(entry) \
>+ ".globl\t" __STRING (entry) "\n\t" \
>+ ".type\t" __STRING (entry) ", @function\n\t" \
>+ CFI_STARTPROC "\n" \
>+ __STRING (entry) ":\n"
>+#endif
>+
>+#ifndef _RTLD_EPILOGUE
>+# define _RTLD_EPILOGUE(entry) \
>+ CFI_ENDPROC "\n\t" \
>+ ".size\t" __STRING (entry) ", . - " __STRING (entry) "\n"
>+#endif
>+
>+#define ELF_MACHINE_JMP_SLOT R_LARCH_JUMP_SLOT
>+#define ELF_MACHINE_IRELATIVE R_LARCH_IRELATIVE
>+
>+#define elf_machine_type_class(type) \
>+ ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \
>+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \
>+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \
>+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \
>+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \
>+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \
>+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \
>+ | (ELF_RTYPE_CLASS_COPY * ((type) == R_LARCH_COPY)))
>+
>+#define ELF_MACHINE_NO_REL 1
>+#define ELF_MACHINE_NO_RELA 0
>+
>+/* Return nonzero iff ELF header is compatible with the running host. */
>+static inline int __attribute_used__
>+elf_machine_matches_host (const ElfW (Ehdr) * ehdr)
>+{
>+ /* We can only run LoongArch binaries. */
>+ if (ehdr->e_machine != EM_LOONGARCH)
>+ return 0;
>+
>+ return 1;
>+}
>+
>+/* Runtime address of .got */
>+#define _GLOBAL_OFFSET_TABLE_ \
>+ ({ \
>+ ElfW (Addr) * r; \
>+ asm("la.pcrel %0, _GLOBAL_OFFSET_TABLE_" : "=r"(r)); \
>+ r; \
>+ })
>+
>+/* Return the link-time address of _DYNAMIC. */
>+static inline ElfW (Addr) elf_machine_dynamic (void)
>+{
>+ return _GLOBAL_OFFSET_TABLE_[0];
>+}
>+
>+#define STRINGXP(X) __STRING (X)
>+#define STRINGXV(X) STRINGV_ (X)
>+#define STRINGV_(...) #__VA_ARGS__
>+
>+/* Return the run-time load address of the shared object. */
>+static inline ElfW (Addr) elf_machine_load_address (void)
>+{
>+ ElfW (Addr) got_linktime_addr;
>+ asm("la.got %0, _GLOBAL_OFFSET_TABLE_"
>+ /* Link-time address in GOT entry before runtime relocation */
>+ : "=r"(got_linktime_addr));
>+ return (ElfW (Addr)) _GLOBAL_OFFSET_TABLE_ - got_linktime_addr;
>+}
>+
>+/* Initial entry point code for the dynamic linker.
>+ The C function `_dl_start' is the real entry point;
>+ its return value is the user program's entry point. */
>+
>+#define RTLD_START \
>+ asm(".text\n\
>+ " _RTLD_PROLOGUE (ENTRY_POINT) "\
>+ .cfi_label .Ldummy \n\
>+ " CFI_UNDEFINED (1) " \n\
>+ or $a0, $sp, $zero \n\
>+ bl _dl_start \n\
>+ # Stash user entry point in s0. \n\
>+ or $s0, $v0, $zero \n\
>+ # See if we were run as a command with the executable file \n\
>+ # name as an extra leading argument. \n\
>+ la $a0, _dl_skip_args \n\
>+ ld.w $a0, $a0, 0 \n\
>+ # Load the original argument count. \n\
>+ ld.d $a1, $sp, 0 \n\
>+ # Subtract _dl_skip_args from it. \n\
>+ sub.d $a1, $a1, $a0 \n\
>+ # Adjust the stack pointer to skip _dl_skip_args words. \n\
>+ slli.d $a0, $a0, 3 \n\
>+ add.d $sp, $sp, $a0 \n\
>+ # Save back the modified argument count. \n\
>+ st.d $a1, $sp, 0 \n\
>+ # Call _dl_init (struct link_map *main_map, int argc, char **argv, \
>+ char **env) \n\
>+ la $a0, _rtld_local \n\
>+ ld.d $a0, $a0, 0 \n\
>+ addi.d $a2, $sp, 8 \n\
>+ slli.d $a3, $a1, 3 \n\
>+ add.d $a3, $a3, $a2 \n\
>+ addi.d $a3, $a3, 8 \n\
>+ # Adjust $sp for 16-aligned \n\
>+ srli.d $t0, $sp, 4 \n\
>+ slli.d $t0, $t0, 4 \n\
>+ ori $t1, $sp, 0 \n\
>+ addi.d $sp, $t0, -32 \n\
>+ st.d $t1, $sp, 24 \n\
>+ # Call the function to run the initializers. \n\
>+ bl _dl_init \n\
>+ # Pass our finalizer function to _start. \n\
>+ ld.d $sp, $sp, 24 \n\
>+ la $a0, _dl_fini \n\
>+ # Jump to the user entry point. \n\
>+ jirl $zero, $s0, 0 \n\
>+ " _RTLD_EPILOGUE (ENTRY_POINT) "\
>+ .previous");
>+
>+/* Names of the architecture-specific auditing callback functions. */
>+#define ARCH_LA_PLTENTER loongarch_gnu_pltenter
>+#define ARCH_LA_PLTEXIT loongarch_gnu_pltexit
>+
>+/* Bias .got.plt entry by the offset requested by the PLT header. */
>+#define elf_machine_plt_value(map, reloc, value) (value)
>+
>+static inline ElfW (Addr)
>+ elf_machine_fixup_plt (struct link_map *map, lookup_t t,
>+ const ElfW (Sym) * refsym, const ElfW (Sym) * sym,
>+ const ElfW (Rela) * reloc, ElfW (Addr) * reloc_addr,
>+ ElfW (Addr) value)
>+{
>+ return *reloc_addr = value;
>+}
>+
>+#endif /* !dl_machine_h */
>+
>+#ifdef RESOLVE_MAP
>+
>+/* Perform a relocation described by R_INFO at the location pointed to
>+ by RELOC_ADDR. SYM is the relocation symbol specified by R_INFO and
>+ MAP is the object containing the reloc. */
>+
>+static inline void __attribute__ ((always_inline))
>+elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[],
>+ const ElfW (Rela) * reloc,
>+ const ElfW (Sym) * sym,
>+ const struct r_found_version *version,
>+ void *const reloc_addr, int skip_ifunc)
>+{
>+ ElfW (Addr) r_info = reloc->r_info;
>+ const unsigned long int r_type = ELFW (R_TYPE) (r_info);
>+ ElfW (Addr) *addr_field = (ElfW (Addr) *) reloc_addr;
>+ const ElfW (Sym) *const __attribute__ ((unused)) refsym = sym;
>+ struct link_map *sym_map = RESOLVE_MAP (map, scope, &sym, version, r_type);
>+ ElfW (Addr) value = 0;
>+ if (sym_map != NULL)
>+ value = SYMBOL_ADDRESS (sym_map, sym, true) + reloc->r_addend;
>+
>+ if (sym != NULL
>+ && __builtin_expect (ELFW (ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, 0)
>+ && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1)
>+ && __builtin_expect (!skip_ifunc, 1))
>+ value = ((ElfW (Addr) (*) (int)) value) (GLRO (dl_hwcap));
>+
>+ switch (r_type)
>+ {
>+#ifndef RTLD_BOOTSTRAP
>+ case __WORDSIZE == 64 ? R_LARCH_TLS_DTPMOD64:
>+ R_LARCH_TLS_DTPMOD32:
>+ if (sym_map)
>+ *addr_field = sym_map->l_tls_modid;
>+ break;
>+
>+ case __WORDSIZE == 64 ? R_LARCH_TLS_DTPREL64:
>+ R_LARCH_TLS_DTPREL32:
>+ if (sym != NULL)
>+ *addr_field = TLS_DTPREL_VALUE (sym) + reloc->r_addend;
>+ break;
>+
>+ case __WORDSIZE == 64 ? R_LARCH_TLS_TPREL64:
>+ R_LARCH_TLS_TPREL32:
>+ if (sym != NULL)
>+ {
>+ CHECK_STATIC_TLS (map, sym_map);
>+ *addr_field = TLS_TPREL_VALUE (sym_map, sym) + reloc->r_addend;
>+ }
>+ break;
>+
>+ case R_LARCH_COPY:
>+ {
>+ if (__glibc_unlikely (sym == NULL))
>+ /* This can happen in trace mode if an object could not be
>+ found. */
>+ break;
>+
>+ /* Handle TLS copy relocations. */
>+ if (__glibc_unlikely (ELFW (ST_TYPE) (sym->st_info) == STT_TLS))
>+ {
>+ /* There's nothing to do if the symbol is in .tbss. */
>+ if (__glibc_likely (sym->st_value
>+ >= sym_map->l_tls_initimage_size))
>+ break;
>+ value += (ElfW (Addr)) sym_map->l_tls_initimage - sym_map->l_addr;
>+ }
Please don't copy TLS copy relocations from riscv. It was a mistake:
https://sourceware.org/bugzilla/show_bug.cgi?id=23825
>+ size_t size = sym->st_size;
>+ if (__glibc_unlikely (sym->st_size != refsym->st_size))
>+ {
>+ const char *strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
>+ if (sym->st_size > refsym->st_size)
>+ size = refsym->st_size;
>+ if (sym->st_size > refsym->st_size || GLRO (dl_verbose))
>+ _dl_error_printf ("\
>+ %s: Symbol `%s' has different size in shared object, consider re-linking\n",
>+ rtld_progname ?: "<program name unknown>",
>+ strtab + refsym->st_name);
>+ }
>+
>+ memcpy (reloc_addr, (void *) value, size);
>+ break;
>+ }
>+#endif
>+
>+#if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
>+ case R_LARCH_RELATIVE:
I have recently removed HAVE_Z_COMBRELOC. Please remove it here.
>+ {
>+#if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC
>+ /* This is defined in rtld.c, but nowhere in the static libc.a;
>+ make the reference weak so static programs can still link.
>+ This declaration cannot be done when compiling rtld.c
>+ (i.e. #ifdef RTLD_BOOTSTRAP) because rtld.c contains the
>+ common defn for _dl_rtld_map, which is incompatible with a
>+ weak decl in the same file. */
>+#ifndef SHARED
>+ weak_extern (GL (dl_rtld_map));
>+#endif
>+ if (map != &GL (dl_rtld_map)) /* Already done in rtld itself. */
>+#endif
>+ *addr_field = map->l_addr + reloc->r_addend;
>+ break;
>+ }
>+#endif
>+
>+ case R_LARCH_JUMP_SLOT:
>+ case __WORDSIZE == 64 ? R_LARCH_64:
>+ R_LARCH_32:
>+ *addr_field = value;
>+ break;
>+
>+ case R_LARCH_IRELATIVE:
>+ value = map->l_addr + reloc->r_addend;
>+ if (__glibc_likely (!skip_ifunc))
>+ value = ((ElfW (Addr) (*) (void)) value) ();
>+ *addr_field = value;
>+ break;
>+
>+ case R_LARCH_NONE:
>+ break;
>+ default:
>+ _dl_reloc_bad_type (map, r_type, 0);
>+ break;
>+ }
>+}
>+
>+static inline void __attribute__ ((always_inline))
>+elf_machine_rela_relative (ElfW (Addr) l_addr, const ElfW (Rela) * reloc,
>+ void *const reloc_addr)
>+{
>+ *(ElfW (Addr) *) reloc_addr = l_addr + reloc->r_addend;
>+}
>+
>+static inline void __attribute__ ((always_inline))
>+elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem *scope[],
>+ ElfW (Addr) l_addr,
>+ const ElfW (Rela) * reloc, int skip_ifunc)
>+{
>+ ElfW (Addr) *const reloc_addr = (void *) (l_addr + reloc->r_offset);
>+ const unsigned int r_type = ELFW (R_TYPE) (reloc->r_info);
>+
>+ /* Check for unexpected PLT reloc type. */
>+ if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT))
>+ {
>+ if (__glibc_unlikely (map->l_mach.plt == 0))
>+ {
>+ if (l_addr)
>+ *reloc_addr += l_addr;
>+ }
>+ else
>+ *reloc_addr = map->l_mach.plt;
>+ }
>+ else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE))
>+ {
>+ ElfW (Addr) *value = (void *) (l_addr + reloc->r_addend);
>+ if (__glibc_likely (!skip_ifunc))
>+ value = (ElfW (Addr) *) ((ElfW (Addr) (*) (void)) value) ();
>+ *reloc_addr = (ElfW (Addr)) value;
>+ }
>+ else
>+ _dl_reloc_bad_type (map, r_type, 1);
>+}
If you can ensure ld doesn't place IRELATIVE in .rela.plt, you can drop
IRELATIVE check in this function.
>+/* Set up the loaded object described by L so its stub function
>+ will jump to the on-demand fixup code __dl_runtime_resolve. */
>+
>+static inline int __attribute__ ((always_inline))
>+elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[],
>+ int lazy, int profile)
>+{
>+#ifndef RTLD_BOOTSTRAP
>+ /* If using PLTs, fill in the first two entries of .got.plt. */
>+ if (l->l_info[DT_JMPREL])
>+ {
>+ extern void _dl_runtime_resolve (void)
>+ __attribute__ ((visibility ("hidden")));
>+ ElfW (Addr) *gotplt = (ElfW (Addr) *) D_PTR (l, l_info[DT_PLTGOT]);
>+ /* If a library is prelinked but we have to relocate anyway,
>+ we have to be able to undo the prelinking of .got.plt.
>+ The prelinker saved the address of .plt for us here. */
prelink has been deprecated and will be removed. You can drop complexity
here and avoid mentioning prelink.
>+ if (gotplt[1])
>+ l->l_mach.plt = gotplt[1] + l->l_addr;
>+ gotplt[0] = (ElfW (Addr)) & _dl_runtime_resolve;
>+ gotplt[1] = (ElfW (Addr)) l;
>+ }
>+#endif
>+
>+ return lazy;
>+}
>+
>+#endif /* RESOLVE_MAP */
>diff --git a/sysdeps/loongarch/dl-trampoline.S b/sysdeps/loongarch/dl-trampoline.S
>new file mode 100644
>index 0000000000..eb610392f6
>--- /dev/null
>+++ b/sysdeps/loongarch/dl-trampoline.S
>@@ -0,0 +1,91 @@
>+/* PLT trampolines.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#include <sysdep.h>
>+#include <sys/asm.h>
>+
>+/* Assembler veneer called from the PLT header code for lazy loading.
>+ The PLT header passes its own args in t0-t2. */
>+
>+#ifdef __loongarch_soft_float
>+# define FRAME_SIZE (-((-10 * SZREG) & ALMASK))
>+#else
>+# define FRAME_SIZE (-((-10 * SZREG - 8 * SZFREG) & ALMASK))
>+#endif
>+
>+ENTRY (_dl_runtime_resolve)
>+
>+ /* Save arguments to stack. */
>+ ADDI sp, sp, -FRAME_SIZE
>+
>+ REG_S ra, sp, 9*SZREG
>+ REG_S a0, sp, 1*SZREG
>+ REG_S a1, sp, 2*SZREG
>+ REG_S a2, sp, 3*SZREG
>+ REG_S a3, sp, 4*SZREG
>+ REG_S a4, sp, 5*SZREG
>+ REG_S a5, sp, 6*SZREG
>+ REG_S a6, sp, 7*SZREG
>+ REG_S a7, sp, 8*SZREG
>+
>+#ifndef __loongarch_soft_float
>+ FREG_S fa0, sp, 10*SZREG + 0*SZFREG
>+ FREG_S fa1, sp, 10*SZREG + 1*SZFREG
>+ FREG_S fa2, sp, 10*SZREG + 2*SZFREG
>+ FREG_S fa3, sp, 10*SZREG + 3*SZFREG
>+ FREG_S fa4, sp, 10*SZREG + 4*SZFREG
>+ FREG_S fa5, sp, 10*SZREG + 5*SZFREG
>+ FREG_S fa6, sp, 10*SZREG + 6*SZFREG
>+ FREG_S fa7, sp, 10*SZREG + 7*SZFREG
>+#endif
>+
>+ /* Update .got.plt and obtain runtime address of callee */
>+ SLLI a1, t1, 1
>+ or a0, t0, zero
>+ ADD a1, a1, t1
>+ la a2, _dl_fixup
>+ jirl ra, a2, 0
>+ or t1, v0, zero
>+
>+ /* Restore arguments from stack. */
>+ REG_L ra, sp, 9*SZREG
>+ REG_L a0, sp, 1*SZREG
>+ REG_L a1, sp, 2*SZREG
>+ REG_L a2, sp, 3*SZREG
>+ REG_L a3, sp, 4*SZREG
>+ REG_L a4, sp, 5*SZREG
>+ REG_L a5, sp, 6*SZREG
>+ REG_L a6, sp, 7*SZREG
>+ REG_L a7, sp, 8*SZREG
>+
>+#ifndef __loongarch_soft_float
>+ FREG_L fa0, sp, 10*SZREG + 0*SZFREG
>+ FREG_L fa1, sp, 10*SZREG + 1*SZFREG
>+ FREG_L fa2, sp, 10*SZREG + 2*SZFREG
>+ FREG_L fa3, sp, 10*SZREG + 3*SZFREG
>+ FREG_L fa4, sp, 10*SZREG + 4*SZFREG
>+ FREG_L fa5, sp, 10*SZREG + 5*SZFREG
>+ FREG_L fa6, sp, 10*SZREG + 6*SZFREG
>+ FREG_L fa7, sp, 10*SZREG + 7*SZFREG
>+#endif
>+
>+ ADDI sp, sp, FRAME_SIZE
>+
>+ /* Invoke the callee. */
>+ jirl zero, t1, 0
>+END (_dl_runtime_resolve)
>diff --git a/sysdeps/loongarch/jmpbuf-offsets.h b/sysdeps/loongarch/jmpbuf-offsets.h
>new file mode 100644
>index 0000000000..a4b8ea690e
>--- /dev/null
>+++ b/sysdeps/loongarch/jmpbuf-offsets.h
>@@ -0,0 +1,22 @@
>+/* Private macros for accessing __jmp_buf contents.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public License as
>+ published by the Free Software Foundation; either version 2.1 of the
>+ License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#include <jmpbuf-unwind.h>
>+
>+/* Helper for generic ____longjmp_chk(). */
>+#define JB_FRAME_ADDRESS(buf) ((void *) _jmpbuf_sp (buf))
>diff --git a/sysdeps/loongarch/jmpbuf-unwind.h b/sysdeps/loongarch/jmpbuf-unwind.h
>new file mode 100644
>index 0000000000..6fa509151d
>--- /dev/null
>+++ b/sysdeps/loongarch/jmpbuf-unwind.h
>@@ -0,0 +1,45 @@
>+/* Examine __jmp_buf for unwinding frames.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#include <setjmp.h>
>+#include <stdint.h>
>+#include <unwind.h>
>+#include <sysdep.h>
>+
>+/* Test if longjmp to JMPBUF would unwind the frame
>+ containing a local variable at ADDRESS. */
>+#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \
>+ ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp))
>+
>+#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
>+ _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
>+
>+static inline uintptr_t __attribute__ ((unused)) _jmpbuf_sp (__jmp_buf regs)
>+{
>+ uintptr_t sp = regs[0].__sp;
>+#ifdef PTR_DEMANGLE
>+ PTR_DEMANGLE (sp);
>+#endif
>+ return sp;
>+}
>+
>+#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
>+ ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
>+
>+/* We use the normal longjmp for unwinding. */
>+#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)
>diff --git a/sysdeps/loongarch/ldsodefs.h b/sysdeps/loongarch/ldsodefs.h
>new file mode 100644
>index 0000000000..36b1b25b9f
>--- /dev/null
>+++ b/sysdeps/loongarch/ldsodefs.h
>@@ -0,0 +1,41 @@
>+/* Run-time dynamic linker data structures for loaded ELF shared objects.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#ifndef _LOONGARCH_LDSODEFS_H
>+#define _LOONGARCH_LDSODEFS_H 1
>+
>+#include <elf.h>
>+
>+struct La_loongarch_regs;
>+struct La_loongarch_retval;
>+
>+#define ARCH_PLTENTER_MEMBERS \
>+ ElfW (Addr) (*loongarch_gnu_pltenter) (ElfW (Sym) *, unsigned int, \
>+ uintptr_t *, uintptr_t *, \
>+ const struct La_loongarch_regs *, \
>+ unsigned int *, const char *name, \
>+ long int *framesizep);
>+
>+#define ARCH_PLTEXIT_MEMBERS \
>+ unsigned int (*loongarch_gnu_pltexit) (ElfW (Sym) *, unsigned int, \
>+ uintptr_t *, uintptr_t *, const struct La_loongarch_regs *, \
>+ struct La_loongarch_retval *, const char *);
>+
>+#include_next <ldsodefs.h>
>+
>+#endif
>diff --git a/sysdeps/loongarch/linkmap.h b/sysdeps/loongarch/linkmap.h
>new file mode 100644
>index 0000000000..bbba73ed70
>--- /dev/null
>+++ b/sysdeps/loongarch/linkmap.h
>@@ -0,0 +1,22 @@
>+/* Definition of link_map_machine.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+struct link_map_machine
>+{
>+ ElfW (Addr) plt; /* Address of .plt. */
>+};
>diff --git a/sysdeps/loongarch/machine-gmon.h b/sysdeps/loongarch/machine-gmon.h
>new file mode 100644
>index 0000000000..4a3cdd964e
>--- /dev/null
>+++ b/sysdeps/loongarch/machine-gmon.h
>@@ -0,0 +1,37 @@
>+/* LoongArch definitions for profiling support.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library; if not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+/* Accept 'frompc' address as argument from the function that calls
>+ _mcount for profiling. Use __builtin_return_address (0)
>+ for the 'selfpc' address. */
>+
>+#include <sysdep.h>
>+
>+static void mcount_internal (unsigned long int frompc,
>+ unsigned long int selfpc);
>+
>+#define _MCOUNT_DECL(frompc, selfpc) \
>+ static inline void mcount_internal (unsigned long int frompc, \
>+ unsigned long int selfpc)
>+
>+#define MCOUNT \
>+ void _mcount (void *frompc) \
>+ { \
>+ mcount_internal ((unsigned long int) frompc, \
>+ (unsigned long int) RETURN_ADDRESS (0)); \
>+ }
>diff --git a/sysdeps/loongarch/setjmp.S b/sysdeps/loongarch/setjmp.S
>new file mode 100644
>index 0000000000..b93ae2f5da
>--- /dev/null
>+++ b/sysdeps/loongarch/setjmp.S
>@@ -0,0 +1,66 @@
>+/* setjmp for LoongArch.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#include <sysdep.h>
>+#include <sys/asm.h>
>+
>+ENTRY (_setjmp)
>+ li.w a1,0
>+ b __sigsetjmp
>+END (_setjmp)
>+
>+ENTRY (setjmp)
>+ li.w a1,1
>+END (setjmp)
>+
>+ENTRY (__sigsetjmp)
>+ REG_S ra, a0, 0*SZREG
>+ REG_S sp, a0, 1*SZREG
>+ REG_S x, a0, 2*SZREG
>+ REG_S fp, a0, 3*SZREG
>+ REG_S s0, a0, 4*SZREG
>+ REG_S s1, a0, 5*SZREG
>+ REG_S s2, a0, 6*SZREG
>+ REG_S s3, a0, 7*SZREG
>+ REG_S s4, a0, 8*SZREG
>+ REG_S s5, a0, 9*SZREG
>+ REG_S s6, a0, 10*SZREG
>+ REG_S s7, a0, 11*SZREG
>+ REG_S s8, a0, 12*SZREG
>+
>+#ifndef __loongarch_soft_float
>+ FREG_S $f24, a0, 13*SZREG + 0*SZFREG
>+ FREG_S $f25, a0, 13*SZREG + 1*SZFREG
>+ FREG_S $f26, a0, 13*SZREG + 2*SZFREG
>+ FREG_S $f27, a0, 13*SZREG + 3*SZFREG
>+ FREG_S $f28, a0, 13*SZREG + 4*SZFREG
>+ FREG_S $f29, a0, 13*SZREG + 5*SZFREG
>+ FREG_S $f30, a0, 13*SZREG + 6*SZFREG
>+ FREG_S $f31, a0, 13*SZREG + 7*SZFREG
>+#endif
>+
>+#if !IS_IN (libc) && IS_IN(rtld)
>+ li.w v0, 0
>+ jirl zero,ra,0
>+#else
>+ b __sigjmp_save
>+#endif
>+END (__sigsetjmp)
>+
>+hidden_def (__sigsetjmp)
>+weak_alias (_setjmp, __GI__setjmp)
>diff --git a/sysdeps/loongarch/sotruss-lib.c b/sysdeps/loongarch/sotruss-lib.c
>new file mode 100644
>index 0000000000..5b15f4815a
>--- /dev/null
>+++ b/sysdeps/loongarch/sotruss-lib.c
>@@ -0,0 +1,50 @@
>+/* Override generic sotruss-lib.c to define actual functions for LoongArch.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#define HAVE_ARCH_PLTENTER
>+#define HAVE_ARCH_PLTEXIT
>+
>+#include <elf/sotruss-lib.c>
>+
>+ElfW (Addr)
>+la_loongarch_gnu_pltenter (ElfW (Sym) * sym __attribute__ ((unused)),
>+ unsigned int ndx __attribute__ ((unused)),
>+ uintptr_t *refcook, uintptr_t *defcook,
>+ La_loongarch_regs *regs, unsigned int *flags,
>+ const char *symname, long int *framesizep)
>+{
>+ print_enter (refcook, defcook, symname, regs->lr_reg[0], regs->lr_reg[1],
>+ regs->lr_reg[2], *flags);
>+
>+ /* No need to copy anything, we will not need the parameters in any case. */
>+ *framesizep = 0;
>+
>+ return sym->st_value;
>+}
>+
>+unsigned int
>+la_loongarch_gnu_pltexit (ElfW (Sym) * sym, unsigned int ndx,
>+ uintptr_t *refcook, uintptr_t *defcook,
>+ const struct La_loongarch_regs *inregs,
>+ struct La_loongarch_retval *outregs,
>+ const char *symname)
>+{
>+ print_exit (refcook, defcook, symname, outregs->lrv_a0);
>+
>+ return 0;
>+}
>diff --git a/sysdeps/loongarch/start.S b/sysdeps/loongarch/start.S
>new file mode 100644
>index 0000000000..a9b32aa966
>--- /dev/null
>+++ b/sysdeps/loongarch/start.S
>@@ -0,0 +1,67 @@
>+/* Startup code compliant to the ELF LoongArch ABI.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#define __ASSEMBLY__ 1
>+#include <entry.h>
>+#include <sys/asm.h>
>+
>+/* The entry point's job is to call __libc_start_main. Per the ABI,
>+ a0 contains the address of a function to be passed to atexit.
>+ __libc_start_main wants this in a5. */
>+
>+/*
>+int
>+__libc_start_main (int (*main) (int, char **, char **),
>+ int argc,
>+ char **argv,
>+ __typeof (main) init,
>+ void (*fini) (void),
>+ void (*rtld_fini) (void),
>+ void *stack_end);
>+ */
>+
>+ENTRY (ENTRY_POINT)
>+
>+/* Terminate call stack by noting ra is undefined. Use a dummy
>+ .cfi_label to force starting the FDE. */
>+ .cfi_label .Ldummy
>+ cfi_undefined (1)
>+ or a5, a0, zero /* rtld_fini */
>+
>+/* We must get symbol main through GOT table, since main may not be local.
>+ For instance: googletest defines main in dynamic library. */
>+ la.got a0, t0, main
>+ REG_L a1, sp, 0
>+ ADDI a2, sp, SZREG
>+
>+ /* Adjust $sp for 16-aligned */
>+ SRLI sp, sp, 4
>+ SLLI sp, sp, 4
>+
>+ move a3, zero /* used to be init */
>+ move a4, zero /* used to be fini */
>+ or a6, sp, zero /* stack_end */
>+
>+ la.got ra, t0, __libc_start_main
>+ jirl ra, ra, 0
>+
>+ la.got ra, t0, abort
>+ jirl ra, ra, 0
>+END (ENTRY_POINT)
>+
>diff --git a/sysdeps/loongarch/sys/asm.h b/sysdeps/loongarch/sys/asm.h
>new file mode 100644
>index 0000000000..b41ee59694
>--- /dev/null
>+++ b/sysdeps/loongarch/sys/asm.h
>@@ -0,0 +1,59 @@
>+/* Miscellaneous macros.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#ifndef _SYS_ASM_H
>+#define _SYS_ASM_H
>+
>+#include <sys/regdef.h>
>+#include <sysdeps/generic/sysdep.h>
>+
>+/* Macros to handle different pointer/register sizes for 32/64-bit code. */
>+#define SZREG 8
>+#define SZFREG 8
>+#define REG_L ld.d
>+#define REG_S st.d
>+#define SRLI srli.d
>+#define SLLI slli.d
>+#define ADDI addi.d
>+#define ADD add.d
>+#define BSTRINS bstrins.d
>+#define LI li.d
>+#define FREG_L fld.d
>+#define FREG_S fst.d
>+
>+/* Declare leaf routine. */
>+#define LEAF(symbol) \
>+ .text; \
>+ .globl symbol; \
>+ .align 3; \
>+ cfi_startproc; \
>+ .type symbol, @function; \
>+ symbol:
>+
>+#define ENTRY(symbol) LEAF (symbol)
>+
>+/* Mark end of function. */
>+#undef END
>+#define END(function) \
>+ cfi_endproc; \
>+ .size function, .- function;
>+
>+/* Stack alignment. */
>+#define ALMASK ~15
>+
>+#endif /* sys/asm.h */
>diff --git a/sysdeps/loongarch/tst-audit.h b/sysdeps/loongarch/tst-audit.h
>new file mode 100644
>index 0000000000..e71948c86e
>--- /dev/null
>+++ b/sysdeps/loongarch/tst-audit.h
>@@ -0,0 +1,23 @@
>+/* Definitions for testing PLT entry/exit auditing.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <https://www.gnu.org/licenses/>. */
>+
>+#define pltenter la_loongarch_gnu_pltenter
>+#define pltexit la_loongarch_gnu_pltexit
>+#define La_regs La_loongarch_regs
>+#define La_retval La_loongarch_retval
>+#define int_retval lrv_a0
>diff --git a/sysdeps/unix/sysv/linux/loongarch/ldconfig.h b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h
>new file mode 100644
>index 0000000000..4887c30ca2
>--- /dev/null
>+++ b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h
>@@ -0,0 +1,26 @@
>+/* ldconfig default paths and libraries.
>+ Copyright (C) 2022 Free Software Foundation, Inc.
>+ This file is part of the GNU C Library.
>+
>+ The GNU C Library is free software; you can redistribute it and/or
>+ modify it under the terms of the GNU Lesser General Public
>+ License as published by the Free Software Foundation; either
>+ version 2.1 of the License, or (at your option) any later version.
>+
>+ The GNU C Library is distributed in the hope that it will be useful,
>+ but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ Lesser General Public License for more details.
>+
>+ You should have received a copy of the GNU Lesser General Public
>+ License along with the GNU C Library. If not, see
>+ <http://www.gnu.org/licenses/>. */
>+
>+#include <sysdeps/generic/ldconfig.h>
>+
>+#define SYSDEP_KNOWN_INTERPRETER_NAMES \
>+ { "/lib64/ld-linux-loongarch-lp64d.so.1", FLAG_ELF_LIBC6 },
>+
>+#define SYSDEP_KNOWN_LIBRARY_NAMES \
>+ { "libc.so.6", FLAG_ELF_LIBC6 }, \
>+ { "libm.so.6", FLAG_ELF_LIBC6 },
>--
>2.31.1
>
On 09/05/2022 05:20, Fangrui Song via Libc-alpha wrote:
>
>> +/* Set up the loaded object described by L so its stub function
>> + will jump to the on-demand fixup code __dl_runtime_resolve. */
>> +
>> +static inline int __attribute__ ((always_inline))
>> +elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[],
>> + int lazy, int profile)
>> +{
>> +#ifndef RTLD_BOOTSTRAP
>> + /* If using PLTs, fill in the first two entries of .got.plt. */
>> + if (l->l_info[DT_JMPREL])
>> + {
>> + extern void _dl_runtime_resolve (void)
>> + __attribute__ ((visibility ("hidden")));
>> + ElfW (Addr) *gotplt = (ElfW (Addr) *) D_PTR (l, l_info[DT_PLTGOT]);
>> + /* If a library is prelinked but we have to relocate anyway,
>> + we have to be able to undo the prelinking of .got.plt.
>> + The prelinker saved the address of .plt for us here. */
>
> prelink has been deprecated and will be removed. You can drop complexity
> here and avoid mentioning prelink.
It was removed already.
On 08/05/2022 23:30, caiyinyu wrote:
> ---
> sysdeps/loongarch/__longjmp.S | 52 +++
> sysdeps/loongarch/bits/endianness.h | 11 +
> sysdeps/loongarch/bits/link.h | 58 +++
> sysdeps/loongarch/bits/setjmp.h | 42 +++
> sysdeps/loongarch/bsd-_setjmp.c | 1 +
> sysdeps/loongarch/bsd-setjmp.c | 1 +
> sysdeps/loongarch/dl-machine.h | 362 +++++++++++++++++++
> sysdeps/loongarch/dl-trampoline.S | 91 +++++
> sysdeps/loongarch/jmpbuf-offsets.h | 22 ++
> sysdeps/loongarch/jmpbuf-unwind.h | 45 +++
> sysdeps/loongarch/ldsodefs.h | 41 +++
> sysdeps/loongarch/linkmap.h | 22 ++
> sysdeps/loongarch/machine-gmon.h | 37 ++
> sysdeps/loongarch/setjmp.S | 66 ++++
> sysdeps/loongarch/sotruss-lib.c | 50 +++
> sysdeps/loongarch/start.S | 67 ++++
> sysdeps/loongarch/sys/asm.h | 59 +++
> sysdeps/loongarch/tst-audit.h | 23 ++
> sysdeps/unix/sysv/linux/loongarch/ldconfig.h | 26 ++
> 19 files changed, 1076 insertions(+)
> create mode 100644 sysdeps/loongarch/__longjmp.S
> create mode 100644 sysdeps/loongarch/bits/endianness.h
> create mode 100644 sysdeps/loongarch/bits/link.h
> create mode 100644 sysdeps/loongarch/bits/setjmp.h
> create mode 100644 sysdeps/loongarch/bsd-_setjmp.c
> create mode 100644 sysdeps/loongarch/bsd-setjmp.c
> create mode 100644 sysdeps/loongarch/dl-machine.h
> create mode 100644 sysdeps/loongarch/dl-trampoline.S
> create mode 100644 sysdeps/loongarch/jmpbuf-offsets.h
> create mode 100644 sysdeps/loongarch/jmpbuf-unwind.h
> create mode 100644 sysdeps/loongarch/ldsodefs.h
> create mode 100644 sysdeps/loongarch/linkmap.h
> create mode 100644 sysdeps/loongarch/machine-gmon.h
> create mode 100644 sysdeps/loongarch/setjmp.S
> create mode 100644 sysdeps/loongarch/sotruss-lib.c
> create mode 100644 sysdeps/loongarch/start.S
> create mode 100644 sysdeps/loongarch/sys/asm.h
> create mode 100644 sysdeps/loongarch/tst-audit.h
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/ldconfig.h
>
> diff --git a/sysdeps/loongarch/__longjmp.S b/sysdeps/loongarch/__longjmp.S
> new file mode 100644
> index 0000000000..b7690dd94f
> --- /dev/null
> +++ b/sysdeps/loongarch/__longjmp.S
> @@ -0,0 +1,52 @@
> +/* longjmp.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#include <sysdep.h>
> +#include <sys/asm.h>
> +
> +ENTRY (__longjmp)
> + REG_L ra, a0, 0*SZREG
> + REG_L sp, a0, 1*SZREG
> + REG_L x, a0, 2*SZREG
> + REG_L fp, a0, 3*SZREG
> + REG_L s0, a0, 4*SZREG
> + REG_L s1, a0, 5*SZREG
> + REG_L s2, a0, 6*SZREG
> + REG_L s3, a0, 7*SZREG
> + REG_L s4, a0, 8*SZREG
> + REG_L s5, a0, 9*SZREG
> + REG_L s6, a0, 10*SZREG
> + REG_L s7, a0, 11*SZREG
> + REG_L s8, a0, 12*SZREG
> +
> +#ifndef __loongarch_soft_float
> + FREG_L $f24, a0, 13*SZREG + 0*SZFREG
> + FREG_L $f25, a0, 13*SZREG + 1*SZFREG
> + FREG_L $f26, a0, 13*SZREG + 2*SZFREG
> + FREG_L $f27, a0, 13*SZREG + 3*SZFREG
> + FREG_L $f28, a0, 13*SZREG + 4*SZFREG
> + FREG_L $f29, a0, 13*SZREG + 5*SZFREG
> + FREG_L $f30, a0, 13*SZREG + 6*SZFREG
> + FREG_L $f31, a0, 13*SZREG + 7*SZFREG
> +#endif
> +
> + sltui a0,a1,1
> + ADD a0, a0, a1 # a0 = (a1 == 0) ? 1 : a1
> + jirl zero,ra,0
> +
> +END (__longjmp)
> diff --git a/sysdeps/loongarch/bits/endianness.h b/sysdeps/loongarch/bits/endianness.h
> new file mode 100644
> index 0000000000..7290be7b18
> --- /dev/null
> +++ b/sysdeps/loongarch/bits/endianness.h
> @@ -0,0 +1,11 @@
> +#ifndef _BITS_ENDIANNESS_H
> +#define _BITS_ENDIANNESS_H 1
> +
> +#ifndef _BITS_ENDIAN_H
> +#error "Never use <bits/endianness.h> directly; include <endian.h> instead."
> +#endif
> +
> +/* LoongArch is little-endian. */
> +#define __BYTE_ORDER __LITTLE_ENDIAN
> +
> +#endif /* bits/endianness.h */
> diff --git a/sysdeps/loongarch/bits/link.h b/sysdeps/loongarch/bits/link.h
> new file mode 100644
> index 0000000000..4df09989cb
> --- /dev/null
> +++ b/sysdeps/loongarch/bits/link.h
> @@ -0,0 +1,58 @@
> +/* Machine-specific declarations for dynamic linker interface.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef _LINK_H
> +#error "Never include <bits/link.h> directly; use <link.h> instead."
> +#endif
> +
> +typedef struct La_loongarch_regs
> +{
> + unsigned long int lr_reg[8]; /* a0 - a7 */
> + double lr_fpreg[8]; /* fa0 - fa7 */
> + unsigned long int lr_ra;
> + unsigned long int lr_sp;
> +} La_loongarch_regs;
> +
> +/* Return values for calls from PLT on LoongArch. */
> +typedef struct La_loongarch_retval
> +{
> + unsigned long int lrv_a0;
> + unsigned long int lrv_a1;
> + double lrv_fa0;
> + double lrv_fa1;
> +} La_loongarch_retval;
> +
> +__BEGIN_DECLS
> +
> +extern ElfW (Addr) la_loongarch_gnu_pltenter (ElfW (Sym) * __sym,
> + unsigned int __ndx,
> + uintptr_t *__refcook,
> + uintptr_t *__defcook,
> + La_loongarch_regs *__regs,
> + unsigned int *__flags,
> + const char *__symname,
> + long int *__framesizep);
> +extern unsigned int la_loongarch_gnu_pltexit (ElfW (Sym) * __sym,
> + unsigned int __ndx,
> + uintptr_t *__refcook,
> + uintptr_t *__defcook,
> + const La_loongarch_regs *__inregs,
> + La_loongarch_retval *__outregs,
> + const char *__symname);
> +
> +__END_DECLS
> diff --git a/sysdeps/loongarch/bits/setjmp.h b/sysdeps/loongarch/bits/setjmp.h
> new file mode 100644
> index 0000000000..8b323ad2b6
> --- /dev/null
> +++ b/sysdeps/loongarch/bits/setjmp.h
> @@ -0,0 +1,42 @@
> +/* Define the machine-dependent type `jmp_buf'.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef _LOONGARCH_BITS_SETJMP_H
> +#define _LOONGARCH_BITS_SETJMP_H
> +
> +typedef struct __jmp_buf_internal_tag
> +{
> + /* Program counter. */
> + long int __pc;
> + /* Stack pointer. */
> + long int __sp;
> + /* Reserved */
> + long int __x;
> + /* Frame pointer. */
> + long int __fp;
> + /* Callee-saved registers. */
> + long int __regs[9];
> +
> +#ifndef __loongarch_soft_float
> + /* Callee-saved floating point registers. */
> + double __fpregs[8];
> +#endif
> +
> +} __jmp_buf[1];
> +
> +#endif /* _LOONGARCH_BITS_SETJMP_H */
> diff --git a/sysdeps/loongarch/bsd-_setjmp.c b/sysdeps/loongarch/bsd-_setjmp.c
> new file mode 100644
> index 0000000000..32f49441c3
> --- /dev/null
> +++ b/sysdeps/loongarch/bsd-_setjmp.c
> @@ -0,0 +1 @@
> +/* _setjmp is implemented in setjmp.S. */
> diff --git a/sysdeps/loongarch/bsd-setjmp.c b/sysdeps/loongarch/bsd-setjmp.c
> new file mode 100644
> index 0000000000..45fd802aac
> --- /dev/null
> +++ b/sysdeps/loongarch/bsd-setjmp.c
> @@ -0,0 +1 @@
> +/* setjmp is implemented in setjmp.S. */
> diff --git a/sysdeps/loongarch/dl-machine.h b/sysdeps/loongarch/dl-machine.h
> new file mode 100644
> index 0000000000..68b68e677d
> --- /dev/null
> +++ b/sysdeps/loongarch/dl-machine.h
> @@ -0,0 +1,362 @@
> +/* Machine-dependent ELF dynamic relocation inline functions.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> +
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef dl_machine_h
> +#define dl_machine_h
> +
> +#define ELF_MACHINE_NAME "LoongArch"
> +
> +#include <entry.h>
> +#include <elf/elf.h>
> +#include <sys/asm.h>
> +#include <dl-tls.h>
> +#include <dl-static-tls.h>
> +#include <dl-machine-rel.h>
> +
> +#ifndef _RTLD_PROLOGUE
> +# define _RTLD_PROLOGUE(entry) \
> + ".globl\t" __STRING (entry) "\n\t" \
> + ".type\t" __STRING (entry) ", @function\n\t" \
> + CFI_STARTPROC "\n" \
> + __STRING (entry) ":\n"
> +#endif
> +
> +#ifndef _RTLD_EPILOGUE
> +# define _RTLD_EPILOGUE(entry) \
> + CFI_ENDPROC "\n\t" \
> + ".size\t" __STRING (entry) ", . - " __STRING (entry) "\n"
> +#endif
> +
> +#define ELF_MACHINE_JMP_SLOT R_LARCH_JUMP_SLOT
> +#define ELF_MACHINE_IRELATIVE R_LARCH_IRELATIVE
> +
> +#define elf_machine_type_class(type) \
> + ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \
> + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \
> + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \
> + || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \
> + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \
> + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \
> + || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \
> + | (ELF_RTYPE_CLASS_COPY * ((type) == R_LARCH_COPY)))
> +
> +#define ELF_MACHINE_NO_REL 1
> +#define ELF_MACHINE_NO_RELA 0
> +
> +/* Return nonzero iff ELF header is compatible with the running host. */
> +static inline int __attribute_used__
I am almost sure that with GNU C11 that we use to build glibc there is no need
to use __attribute_used__. I take you are copy/paste from other ports, but it
would be goot to see if we can clean this up.
> +elf_machine_matches_host (const ElfW (Ehdr) * ehdr)
> +{
> + /* We can only run LoongArch binaries. */
> + if (ehdr->e_machine != EM_LOONGARCH)
> + return 0;
> +
> + return 1;
> +}
> +
> +/* Runtime address of .got */
> +#define _GLOBAL_OFFSET_TABLE_ \
> + ({ \
> + ElfW (Addr) * r; \
> + asm("la.pcrel %0, _GLOBAL_OFFSET_TABLE_" : "=r"(r)); \
> + r; \
> + })
> +
> +/* Return the link-time address of _DYNAMIC. */
> +static inline ElfW (Addr) elf_machine_dynamic (void)
> +{
> + return _GLOBAL_OFFSET_TABLE_[0];
> +}
> +
> +#define STRINGXP(X) __STRING (X)
> +#define STRINGXV(X) STRINGV_ (X)
> +#define STRINGV_(...) #__VA_ARGS__
These seems not be used on the patch.
> +
> +/* Return the run-time load address of the shared object. */
> +static inline ElfW (Addr) elf_machine_load_address (void)
> +{
> + ElfW (Addr) got_linktime_addr;
> + asm("la.got %0, _GLOBAL_OFFSET_TABLE_"
> + /* Link-time address in GOT entry before runtime relocation */
> + : "=r"(got_linktime_addr));
> + return (ElfW (Addr)) _GLOBAL_OFFSET_TABLE_ - got_linktime_addr;
> +}
> +
> +/* Initial entry point code for the dynamic linker.
> + The C function `_dl_start' is the real entry point;
> + its return value is the user program's entry point. */
> +
> +#define RTLD_START \
> + asm(".text\n\
> + " _RTLD_PROLOGUE (ENTRY_POINT) "\
> + .cfi_label .Ldummy \n\
> + " CFI_UNDEFINED (1) " \n\
> + or $a0, $sp, $zero \n\
> + bl _dl_start \n\
> + # Stash user entry point in s0. \n\
> + or $s0, $v0, $zero \n\
> + # See if we were run as a command with the executable file \n\
> + # name as an extra leading argument. \n\
> + la $a0, _dl_skip_args \n\
> + ld.w $a0, $a0, 0 \n\
> + # Load the original argument count. \n\
> + ld.d $a1, $sp, 0 \n\
> + # Subtract _dl_skip_args from it. \n\
> + sub.d $a1, $a1, $a0 \n\
> + # Adjust the stack pointer to skip _dl_skip_args words. \n\
> + slli.d $a0, $a0, 3 \n\
> + add.d $sp, $sp, $a0 \n\
> + # Save back the modified argument count. \n\
> + st.d $a1, $sp, 0 \n\
> + # Call _dl_init (struct link_map *main_map, int argc, char **argv, \
> + char **env) \n\
> + la $a0, _rtld_local \n\
> + ld.d $a0, $a0, 0 \n\
> + addi.d $a2, $sp, 8 \n\
> + slli.d $a3, $a1, 3 \n\
> + add.d $a3, $a3, $a2 \n\
> + addi.d $a3, $a3, 8 \n\
> + # Adjust $sp for 16-aligned \n\
> + srli.d $t0, $sp, 4 \n\
> + slli.d $t0, $t0, 4 \n\
> + ori $t1, $sp, 0 \n\
> + addi.d $sp, $t0, -32 \n\
> + st.d $t1, $sp, 24 \n\
> + # Call the function to run the initializers. \n\
> + bl _dl_init \n\
> + # Pass our finalizer function to _start. \n\
> + ld.d $sp, $sp, 24 \n\
> + la $a0, _dl_fini \n\
> + # Jump to the user entry point. \n\
> + jirl $zero, $s0, 0 \n\
> + " _RTLD_EPILOGUE (ENTRY_POINT) "\
> + .previous");
> +
> +/* Names of the architecture-specific auditing callback functions. */
> +#define ARCH_LA_PLTENTER loongarch_gnu_pltenter
> +#define ARCH_LA_PLTEXIT loongarch_gnu_pltexit
> +
> +/* Bias .got.plt entry by the offset requested by the PLT header. */
> +#define elf_machine_plt_value(map, reloc, value) (value)
> +
> +static inline ElfW (Addr)
> + elf_machine_fixup_plt (struct link_map *map, lookup_t t,
Indentation seeems off here.
> + const ElfW (Sym) * refsym, const ElfW (Sym) * sym,
> + const ElfW (Rela) * reloc, ElfW (Addr) * reloc_addr,
> + ElfW (Addr) value)
> +{
> + return *reloc_addr = value;
> +}
> +
> +#endif /* !dl_machine_h */
> +
> +#ifdef RESOLVE_MAP
> +
> +/* Perform a relocation described by R_INFO at the location pointed to
> + by RELOC_ADDR. SYM is the relocation symbol specified by R_INFO and
> + MAP is the object containing the reloc. */
> +
> +static inline void __attribute__ ((always_inline))
> +elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[],
> + const ElfW (Rela) * reloc,
> + const ElfW (Sym) * sym,
> + const struct r_found_version *version,
> + void *const reloc_addr, int skip_ifunc)
> +{
> + ElfW (Addr) r_info = reloc->r_info;
> + const unsigned long int r_type = ELFW (R_TYPE) (r_info);
> + ElfW (Addr) *addr_field = (ElfW (Addr) *) reloc_addr;
> + const ElfW (Sym) *const __attribute__ ((unused)) refsym = sym;
> + struct link_map *sym_map = RESOLVE_MAP (map, scope, &sym, version, r_type);
> + ElfW (Addr) value = 0;
> + if (sym_map != NULL)
> + value = SYMBOL_ADDRESS (sym_map, sym, true) + reloc->r_addend;
> +
> + if (sym != NULL
> + && __builtin_expect (ELFW (ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, 0)
> + && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1)
> + && __builtin_expect (!skip_ifunc, 1))
I think we should use __glibc_likely on newer code, as you are already doing
below.
> + value = ((ElfW (Addr) (*) (int)) value) (GLRO (dl_hwcap));
> +
> + switch (r_type)
> + {
> +#ifndef RTLD_BOOTSTRAP
> + case __WORDSIZE == 64 ? R_LARCH_TLS_DTPMOD64:
> + R_LARCH_TLS_DTPMOD32:
> + if (sym_map)
> + *addr_field = sym_map->l_tls_modid;
> + break;
> +
> + case __WORDSIZE == 64 ? R_LARCH_TLS_DTPREL64:
> + R_LARCH_TLS_DTPREL32:
> + if (sym != NULL)
> + *addr_field = TLS_DTPREL_VALUE (sym) + reloc->r_addend;
> + break;
> +
> + case __WORDSIZE == 64 ? R_LARCH_TLS_TPREL64:
> + R_LARCH_TLS_TPREL32:
> + if (sym != NULL)
> + {
> + CHECK_STATIC_TLS (map, sym_map);
> + *addr_field = TLS_TPREL_VALUE (sym_map, sym) + reloc->r_addend;
> + }
> + break;
> +
> + case R_LARCH_COPY:
> + {
> + if (__glibc_unlikely (sym == NULL))
> + /* This can happen in trace mode if an object could not be
> + found. */
> + break;
> +
> + /* Handle TLS copy relocations. */
> + if (__glibc_unlikely (ELFW (ST_TYPE) (sym->st_info) == STT_TLS))
> + {
> + /* There's nothing to do if the symbol is in .tbss. */
> + if (__glibc_likely (sym->st_value
> + >= sym_map->l_tls_initimage_size))
> + break;
> + value += (ElfW (Addr)) sym_map->l_tls_initimage - sym_map->l_addr;
> + }
> +
> + size_t size = sym->st_size;
> + if (__glibc_unlikely (sym->st_size != refsym->st_size))
> + {
> + const char *strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
> + if (sym->st_size > refsym->st_size)
> + size = refsym->st_size;
> + if (sym->st_size > refsym->st_size || GLRO (dl_verbose))
> + _dl_error_printf ("\
> + %s: Symbol `%s' has different size in shared object, consider re-linking\n",
> + rtld_progname ?: "<program name unknown>",
> + strtab + refsym->st_name);
> + }
> +
> + memcpy (reloc_addr, (void *) value, size);
> + break;
> + }
> +#endif
> +
> +#if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
> + case R_LARCH_RELATIVE:
> + {
> +#if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC
> + /* This is defined in rtld.c, but nowhere in the static libc.a;
> + make the reference weak so static programs can still link.
> + This declaration cannot be done when compiling rtld.c
> + (i.e. #ifdef RTLD_BOOTSTRAP) because rtld.c contains the
> + common defn for _dl_rtld_map, which is incompatible with a
> + weak decl in the same file. */
> +#ifndef SHARED
> + weak_extern (GL (dl_rtld_map));
> +#endif
> + if (map != &GL (dl_rtld_map)) /* Already done in rtld itself. */
> +#endif
> + *addr_field = map->l_addr + reloc->r_addend;
> + break;
> + }
> +#endif
> +
> + case R_LARCH_JUMP_SLOT:
> + case __WORDSIZE == 64 ? R_LARCH_64:
> + R_LARCH_32:
> + *addr_field = value;
> + break;
> +
> + case R_LARCH_IRELATIVE:
> + value = map->l_addr + reloc->r_addend;
> + if (__glibc_likely (!skip_ifunc))
> + value = ((ElfW (Addr) (*) (void)) value) ();
> + *addr_field = value;
> + break;
> +
> + case R_LARCH_NONE:
> + break;
> +
> + default:
> + _dl_reloc_bad_type (map, r_type, 0);
> + break;
> + }
> +}
> +
> +static inline void __attribute__ ((always_inline))
> +elf_machine_rela_relative (ElfW (Addr) l_addr, const ElfW (Rela) * reloc,
> + void *const reloc_addr)
> +{
> + *(ElfW (Addr) *) reloc_addr = l_addr + reloc->r_addend;
> +}
> +
> +static inline void __attribute__ ((always_inline))
> +elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem *scope[],
> + ElfW (Addr) l_addr,
> + const ElfW (Rela) * reloc, int skip_ifunc)
> +{
> + ElfW (Addr) *const reloc_addr = (void *) (l_addr + reloc->r_offset);
> + const unsigned int r_type = ELFW (R_TYPE) (reloc->r_info);
> +
> + /* Check for unexpected PLT reloc type. */
> + if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT))
> + {
> + if (__glibc_unlikely (map->l_mach.plt == 0))
> + {
> + if (l_addr)
> + *reloc_addr += l_addr;
> + }
> + else
> + *reloc_addr = map->l_mach.plt;
> + }
> + else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE))
> + {
> + ElfW (Addr) *value = (void *) (l_addr + reloc->r_addend);
> + if (__glibc_likely (!skip_ifunc))
> + value = (ElfW (Addr) *) ((ElfW (Addr) (*) (void)) value) ();
> + *reloc_addr = (ElfW (Addr)) value;
> + }
> + else
> + _dl_reloc_bad_type (map, r_type, 1);
> +}
> +
> +/* Set up the loaded object described by L so its stub function
> + will jump to the on-demand fixup code __dl_runtime_resolve. */
> +
> +static inline int __attribute__ ((always_inline))
> +elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[],
> + int lazy, int profile)
> +{
> +#ifndef RTLD_BOOTSTRAP
> + /* If using PLTs, fill in the first two entries of .got.plt. */
> + if (l->l_info[DT_JMPREL])
> + {
> + extern void _dl_runtime_resolve (void)
> + __attribute__ ((visibility ("hidden")));
> + ElfW (Addr) *gotplt = (ElfW (Addr) *) D_PTR (l, l_info[DT_PLTGOT]);
> + /* If a library is prelinked but we have to relocate anyway,
> + we have to be able to undo the prelinking of .got.plt.
> + The prelinker saved the address of .plt for us here. */
> + if (gotplt[1])
> + l->l_mach.plt = gotplt[1] + l->l_addr;
> + gotplt[0] = (ElfW (Addr)) & _dl_runtime_resolve;
> + gotplt[1] = (ElfW (Addr)) l;
> + }
> +#endif
> +
> + return lazy;
> +}
> +
> +#endif /* RESOLVE_MAP */
> diff --git a/sysdeps/loongarch/dl-trampoline.S b/sysdeps/loongarch/dl-trampoline.S
> new file mode 100644
> index 0000000000..eb610392f6
> --- /dev/null
> +++ b/sysdeps/loongarch/dl-trampoline.S
> @@ -0,0 +1,91 @@
> +/* PLT trampolines.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#include <sysdep.h>
> +#include <sys/asm.h>
> +
> +/* Assembler veneer called from the PLT header code for lazy loading.
> + The PLT header passes its own args in t0-t2. */
> +
> +#ifdef __loongarch_soft_float
> +# define FRAME_SIZE (-((-10 * SZREG) & ALMASK))
> +#else
> +# define FRAME_SIZE (-((-10 * SZREG - 8 * SZFREG) & ALMASK))
> +#endif
> +
> +ENTRY (_dl_runtime_resolve)
> +
> + /* Save arguments to stack. */
> + ADDI sp, sp, -FRAME_SIZE
> +
> + REG_S ra, sp, 9*SZREG
> + REG_S a0, sp, 1*SZREG
> + REG_S a1, sp, 2*SZREG
> + REG_S a2, sp, 3*SZREG
> + REG_S a3, sp, 4*SZREG
> + REG_S a4, sp, 5*SZREG
> + REG_S a5, sp, 6*SZREG
> + REG_S a6, sp, 7*SZREG
> + REG_S a7, sp, 8*SZREG
> +
> +#ifndef __loongarch_soft_float
> + FREG_S fa0, sp, 10*SZREG + 0*SZFREG
> + FREG_S fa1, sp, 10*SZREG + 1*SZFREG
> + FREG_S fa2, sp, 10*SZREG + 2*SZFREG
> + FREG_S fa3, sp, 10*SZREG + 3*SZFREG
> + FREG_S fa4, sp, 10*SZREG + 4*SZFREG
> + FREG_S fa5, sp, 10*SZREG + 5*SZFREG
> + FREG_S fa6, sp, 10*SZREG + 6*SZFREG
> + FREG_S fa7, sp, 10*SZREG + 7*SZFREG
> +#endif
> +
> + /* Update .got.plt and obtain runtime address of callee */
> + SLLI a1, t1, 1
> + or a0, t0, zero
> + ADD a1, a1, t1
> + la a2, _dl_fixup
> + jirl ra, a2, 0
> + or t1, v0, zero
> +
> + /* Restore arguments from stack. */
> + REG_L ra, sp, 9*SZREG
> + REG_L a0, sp, 1*SZREG
> + REG_L a1, sp, 2*SZREG
> + REG_L a2, sp, 3*SZREG
> + REG_L a3, sp, 4*SZREG
> + REG_L a4, sp, 5*SZREG
> + REG_L a5, sp, 6*SZREG
> + REG_L a6, sp, 7*SZREG
> + REG_L a7, sp, 8*SZREG
> +
> +#ifndef __loongarch_soft_float
> + FREG_L fa0, sp, 10*SZREG + 0*SZFREG
> + FREG_L fa1, sp, 10*SZREG + 1*SZFREG
> + FREG_L fa2, sp, 10*SZREG + 2*SZFREG
> + FREG_L fa3, sp, 10*SZREG + 3*SZFREG
> + FREG_L fa4, sp, 10*SZREG + 4*SZFREG
> + FREG_L fa5, sp, 10*SZREG + 5*SZFREG
> + FREG_L fa6, sp, 10*SZREG + 6*SZFREG
> + FREG_L fa7, sp, 10*SZREG + 7*SZFREG
> +#endif
> +
> + ADDI sp, sp, FRAME_SIZE
> +
> + /* Invoke the callee. */
> + jirl zero, t1, 0
> +END (_dl_runtime_resolve)
> diff --git a/sysdeps/loongarch/jmpbuf-offsets.h b/sysdeps/loongarch/jmpbuf-offsets.h
> new file mode 100644
> index 0000000000..a4b8ea690e
> --- /dev/null
> +++ b/sysdeps/loongarch/jmpbuf-offsets.h
> @@ -0,0 +1,22 @@
> +/* Private macros for accessing __jmp_buf contents.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public License as
> + published by the Free Software Foundation; either version 2.1 of the
> + License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#include <jmpbuf-unwind.h>
> +
> +/* Helper for generic ____longjmp_chk(). */
> +#define JB_FRAME_ADDRESS(buf) ((void *) _jmpbuf_sp (buf))
> diff --git a/sysdeps/loongarch/jmpbuf-unwind.h b/sysdeps/loongarch/jmpbuf-unwind.h
> new file mode 100644
> index 0000000000..6fa509151d
> --- /dev/null
> +++ b/sysdeps/loongarch/jmpbuf-unwind.h
> @@ -0,0 +1,45 @@
> +/* Examine __jmp_buf for unwinding frames.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#include <setjmp.h>
> +#include <stdint.h>
> +#include <unwind.h>
> +#include <sysdep.h>
> +
> +/* Test if longjmp to JMPBUF would unwind the frame
> + containing a local variable at ADDRESS. */
> +#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \
> + ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp))
> +
> +#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
> + _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
> +
> +static inline uintptr_t __attribute__ ((unused)) _jmpbuf_sp (__jmp_buf regs)
> +{
> + uintptr_t sp = regs[0].__sp;
> +#ifdef PTR_DEMANGLE
> + PTR_DEMANGLE (sp);
> +#endif
> + return sp;
> +}
> +
> +#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
> + ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
> +
> +/* We use the normal longjmp for unwinding. */
> +#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)
> diff --git a/sysdeps/loongarch/ldsodefs.h b/sysdeps/loongarch/ldsodefs.h
> new file mode 100644
> index 0000000000..36b1b25b9f
> --- /dev/null
> +++ b/sysdeps/loongarch/ldsodefs.h
> @@ -0,0 +1,41 @@
> +/* Run-time dynamic linker data structures for loaded ELF shared objects.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef _LOONGARCH_LDSODEFS_H
> +#define _LOONGARCH_LDSODEFS_H 1
> +
> +#include <elf.h>
> +
> +struct La_loongarch_regs;
> +struct La_loongarch_retval;
> +
> +#define ARCH_PLTENTER_MEMBERS \
> + ElfW (Addr) (*loongarch_gnu_pltenter) (ElfW (Sym) *, unsigned int, \
> + uintptr_t *, uintptr_t *, \
> + const struct La_loongarch_regs *, \
> + unsigned int *, const char *name, \
> + long int *framesizep);
> +
> +#define ARCH_PLTEXIT_MEMBERS \
> + unsigned int (*loongarch_gnu_pltexit) (ElfW (Sym) *, unsigned int, \
> + uintptr_t *, uintptr_t *, const struct La_loongarch_regs *, \
> + struct La_loongarch_retval *, const char *);
> +
> +#include_next <ldsodefs.h>
> +
> +#endif
> diff --git a/sysdeps/loongarch/linkmap.h b/sysdeps/loongarch/linkmap.h
> new file mode 100644
> index 0000000000..bbba73ed70
> --- /dev/null
> +++ b/sysdeps/loongarch/linkmap.h
> @@ -0,0 +1,22 @@
> +/* Definition of link_map_machine.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +struct link_map_machine
> +{
> + ElfW (Addr) plt; /* Address of .plt. */
> +};
> diff --git a/sysdeps/loongarch/machine-gmon.h b/sysdeps/loongarch/machine-gmon.h
> new file mode 100644
> index 0000000000..4a3cdd964e
> --- /dev/null
> +++ b/sysdeps/loongarch/machine-gmon.h
> @@ -0,0 +1,37 @@
> +/* LoongArch definitions for profiling support.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +/* Accept 'frompc' address as argument from the function that calls
> + _mcount for profiling. Use __builtin_return_address (0)
> + for the 'selfpc' address. */
> +
> +#include <sysdep.h>
> +
> +static void mcount_internal (unsigned long int frompc,
> + unsigned long int selfpc);
> +
> +#define _MCOUNT_DECL(frompc, selfpc) \
> + static inline void mcount_internal (unsigned long int frompc, \
> + unsigned long int selfpc)
> +
> +#define MCOUNT \
> + void _mcount (void *frompc) \
> + { \
> + mcount_internal ((unsigned long int) frompc, \
> + (unsigned long int) RETURN_ADDRESS (0)); \
> + }
> diff --git a/sysdeps/loongarch/setjmp.S b/sysdeps/loongarch/setjmp.S
> new file mode 100644
> index 0000000000..b93ae2f5da
> --- /dev/null
> +++ b/sysdeps/loongarch/setjmp.S
> @@ -0,0 +1,66 @@
> +/* setjmp for LoongArch.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#include <sysdep.h>
> +#include <sys/asm.h>
> +
> +ENTRY (_setjmp)
> + li.w a1,0
> + b __sigsetjmp
> +END (_setjmp)
> +
> +ENTRY (setjmp)
> + li.w a1,1
> +END (setjmp)
> +
> +ENTRY (__sigsetjmp)
> + REG_S ra, a0, 0*SZREG
> + REG_S sp, a0, 1*SZREG
> + REG_S x, a0, 2*SZREG
> + REG_S fp, a0, 3*SZREG
> + REG_S s0, a0, 4*SZREG
> + REG_S s1, a0, 5*SZREG
> + REG_S s2, a0, 6*SZREG
> + REG_S s3, a0, 7*SZREG
> + REG_S s4, a0, 8*SZREG
> + REG_S s5, a0, 9*SZREG
> + REG_S s6, a0, 10*SZREG
> + REG_S s7, a0, 11*SZREG
> + REG_S s8, a0, 12*SZREG
> +
> +#ifndef __loongarch_soft_float
> + FREG_S $f24, a0, 13*SZREG + 0*SZFREG
> + FREG_S $f25, a0, 13*SZREG + 1*SZFREG
> + FREG_S $f26, a0, 13*SZREG + 2*SZFREG
> + FREG_S $f27, a0, 13*SZREG + 3*SZFREG
> + FREG_S $f28, a0, 13*SZREG + 4*SZFREG
> + FREG_S $f29, a0, 13*SZREG + 5*SZFREG
> + FREG_S $f30, a0, 13*SZREG + 6*SZFREG
> + FREG_S $f31, a0, 13*SZREG + 7*SZFREG
> +#endif
> +
> +#if !IS_IN (libc) && IS_IN(rtld)
> + li.w v0, 0
> + jirl zero,ra,0
> +#else
> + b __sigjmp_save
> +#endif
> +END (__sigsetjmp)
> +
> +hidden_def (__sigsetjmp)
> +weak_alias (_setjmp, __GI__setjmp)
> diff --git a/sysdeps/loongarch/sotruss-lib.c b/sysdeps/loongarch/sotruss-lib.c
> new file mode 100644
> index 0000000000..5b15f4815a
> --- /dev/null
> +++ b/sysdeps/loongarch/sotruss-lib.c
> @@ -0,0 +1,50 @@
> +/* Override generic sotruss-lib.c to define actual functions for LoongArch.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#define HAVE_ARCH_PLTENTER
> +#define HAVE_ARCH_PLTEXIT
> +
> +#include <elf/sotruss-lib.c>
> +
> +ElfW (Addr)
> +la_loongarch_gnu_pltenter (ElfW (Sym) * sym __attribute__ ((unused)),
> + unsigned int ndx __attribute__ ((unused)),
> + uintptr_t *refcook, uintptr_t *defcook,
> + La_loongarch_regs *regs, unsigned int *flags,
> + const char *symname, long int *framesizep)
> +{
> + print_enter (refcook, defcook, symname, regs->lr_reg[0], regs->lr_reg[1],
> + regs->lr_reg[2], *flags);
> +
> + /* No need to copy anything, we will not need the parameters in any case. */
> + *framesizep = 0;
> +
> + return sym->st_value;
> +}
> +
> +unsigned int
> +la_loongarch_gnu_pltexit (ElfW (Sym) * sym, unsigned int ndx,
> + uintptr_t *refcook, uintptr_t *defcook,
> + const struct La_loongarch_regs *inregs,
> + struct La_loongarch_retval *outregs,
> + const char *symname)
> +{
> + print_exit (refcook, defcook, symname, outregs->lrv_a0);
> +
> + return 0;
> +}
> diff --git a/sysdeps/loongarch/start.S b/sysdeps/loongarch/start.S
> new file mode 100644
> index 0000000000..a9b32aa966
> --- /dev/null
> +++ b/sysdeps/loongarch/start.S
> @@ -0,0 +1,67 @@
> +/* Startup code compliant to the ELF LoongArch ABI.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#define __ASSEMBLY__ 1
> +#include <entry.h>
> +#include <sys/asm.h>
> +
> +/* The entry point's job is to call __libc_start_main. Per the ABI,
> + a0 contains the address of a function to be passed to atexit.
> + __libc_start_main wants this in a5. */
> +
> +/*
> +int
> +__libc_start_main (int (*main) (int, char **, char **),
> + int argc,
> + char **argv,
> + __typeof (main) init,
> + void (*fini) (void),
> + void (*rtld_fini) (void),
> + void *stack_end);
> + */
> +
> +ENTRY (ENTRY_POINT)
> +
> +/* Terminate call stack by noting ra is undefined. Use a dummy
> + .cfi_label to force starting the FDE. */
> + .cfi_label .Ldummy
> + cfi_undefined (1)
> + or a5, a0, zero /* rtld_fini */
> +
> +/* We must get symbol main through GOT table, since main may not be local.
> + For instance: googletest defines main in dynamic library. */
> + la.got a0, t0, main
> + REG_L a1, sp, 0
> + ADDI a2, sp, SZREG
> +
> + /* Adjust $sp for 16-aligned */
> + SRLI sp, sp, 4
> + SLLI sp, sp, 4
> +
> + move a3, zero /* used to be init */
> + move a4, zero /* used to be fini */
> + or a6, sp, zero /* stack_end */
> +
> + la.got ra, t0, __libc_start_main
> + jirl ra, ra, 0
> +
> + la.got ra, t0, abort
> + jirl ra, ra, 0
> +END (ENTRY_POINT)
> +
> diff --git a/sysdeps/loongarch/sys/asm.h b/sysdeps/loongarch/sys/asm.h
> new file mode 100644
> index 0000000000..b41ee59694
> --- /dev/null
> +++ b/sysdeps/loongarch/sys/asm.h
> @@ -0,0 +1,59 @@
> +/* Miscellaneous macros.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef _SYS_ASM_H
> +#define _SYS_ASM_H
> +
> +#include <sys/regdef.h>
> +#include <sysdeps/generic/sysdep.h>
> +
> +/* Macros to handle different pointer/register sizes for 32/64-bit code. */
> +#define SZREG 8
> +#define SZFREG 8
> +#define REG_L ld.d
> +#define REG_S st.d
> +#define SRLI srli.d
> +#define SLLI slli.d
> +#define ADDI addi.d
> +#define ADD add.d
> +#define BSTRINS bstrins.d
> +#define LI li.d
> +#define FREG_L fld.d
> +#define FREG_S fst.d
> +
> +/* Declare leaf routine. */
> +#define LEAF(symbol) \
> + .text; \
> + .globl symbol; \
> + .align 3; \
> + cfi_startproc; \
> + .type symbol, @function; \
> + symbol:
> +
> +#define ENTRY(symbol) LEAF (symbol)
> +
> +/* Mark end of function. */
> +#undef END
> +#define END(function) \
> + cfi_endproc; \
> + .size function, .- function;
> +
> +/* Stack alignment. */
> +#define ALMASK ~15
> +
> +#endif /* sys/asm.h */
> diff --git a/sysdeps/loongarch/tst-audit.h b/sysdeps/loongarch/tst-audit.h
> new file mode 100644
> index 0000000000..e71948c86e
> --- /dev/null
> +++ b/sysdeps/loongarch/tst-audit.h
> @@ -0,0 +1,23 @@
> +/* Definitions for testing PLT entry/exit auditing.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#define pltenter la_loongarch_gnu_pltenter
> +#define pltexit la_loongarch_gnu_pltexit
> +#define La_regs La_loongarch_regs
> +#define La_retval La_loongarch_retval
> +#define int_retval lrv_a0
> diff --git a/sysdeps/unix/sysv/linux/loongarch/ldconfig.h b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h
> new file mode 100644
> index 0000000000..4887c30ca2
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h
> @@ -0,0 +1,26 @@
> +/* ldconfig default paths and libraries.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <http://www.gnu.org/licenses/>. */
> +
> +#include <sysdeps/generic/ldconfig.h>
> +
> +#define SYSDEP_KNOWN_INTERPRETER_NAMES \
> + { "/lib64/ld-linux-loongarch-lp64d.so.1", FLAG_ELF_LIBC6 },
> +
> +#define SYSDEP_KNOWN_LIBRARY_NAMES \
> + { "libc.so.6", FLAG_ELF_LIBC6 }, \
> + { "libm.so.6", FLAG_ELF_LIBC6 },
* Adhemerval Zanella via Libc-alpha:
>> +/* Return nonzero iff ELF header is compatible with the running host. */
>> +static inline int __attribute_used__
>
> I am almost sure that with GNU C11 that we use to build glibc there is no need
> to use __attribute_used__. I take you are copy/paste from other ports, but it
> would be goot to see if we can clean this up.
And __attribute_used__ does more than suppressing the warning: it also
emits a copy for access from assembler code (which is not needed here).
Thanks,
Florian
On 08/05/2022 23:30, caiyinyu wrote:
> ---
> +/* Return the run-time load address of the shared object. */
> +static inline ElfW (Addr) elf_machine_load_address (void)
> +{
> + ElfW (Addr) got_linktime_addr;
> + asm("la.got %0, _GLOBAL_OFFSET_TABLE_"
> + /* Link-time address in GOT entry before runtime relocation */
> + : "=r"(got_linktime_addr));
> + return (ElfW (Addr)) _GLOBAL_OFFSET_TABLE_ - got_linktime_addr;
> +}
> +
> +/* Initial entry point code for the dynamic linker.
> + The C function `_dl_start' is the real entry point;
> + its return value is the user program's entry point. */
> +
> +#define RTLD_START \
> + asm(".text\n\
> + " _RTLD_PROLOGUE (ENTRY_POINT) "\
> + .cfi_label .Ldummy \n\
> + " CFI_UNDEFINED (1) " \n\
> + or $a0, $sp, $zero \n\
> + bl _dl_start \n\
> + # Stash user entry point in s0. \n\
> + or $s0, $v0, $zero \n\
> + # See if we were run as a command with the executable file \n\
> + # name as an extra leading argument. \n\
> + la $a0, _dl_skip_args \n\
> + ld.w $a0, $a0, 0 \n\
> + # Load the original argument count. \n\
> + ld.d $a1, $sp, 0 \n\
> + # Subtract _dl_skip_args from it. \n\
> + sub.d $a1, $a1, $a0 \n\
> + # Adjust the stack pointer to skip _dl_skip_args words. \n\
> + slli.d $a0, $a0, 3 \n\
> + add.d $sp, $sp, $a0 \n\
> + # Save back the modified argument count. \n\
> + st.d $a1, $sp, 0 \n\
> + # Call _dl_init (struct link_map *main_map, int argc, char **argv, \
> + char **env) \n\
Since ad43cac44a6860eaefcadadfb2acb349921e96bf there is no need to adjust the
arguments using _dl_skip_args; if you don't do anything ABI special you just
need to just reload argc from _dl_argc. I have adapted all of architectures to
eventually remove _dl_skip_args [1], so please follow the same pattern here.
[1] https://patchwork.sourceware.org/project/glibc/list/?series=9706
> + la $a0, _rtld_local \n\
> + ld.d $a0, $a0, 0 \n\
> + addi.d $a2, $sp, 8 \n\
> + slli.d $a3, $a1, 3 \n\
> + add.d $a3, $a3, $a2 \n\
> + addi.d $a3, $a3, 8 \n\
> + # Adjust $sp for 16-aligned \n\
> + srli.d $t0, $sp, 4 \n\
> + slli.d $t0, $t0, 4 \n\
> + ori $t1, $sp, 0 \n\
> + addi.d $sp, $t0, -32 \n\
> + st.d $t1, $sp, 24 \n\
> + # Call the function to run the initializers. \n\
> + bl _dl_init \n\
> + # Pass our finalizer function to _start. \n\
> + ld.d $sp, $sp, 24 \n\
> + la $a0, _dl_fini \n\
> + # Jump to the user entry point. \n\
> + jirl $zero, $s0, 0 \n\
> + " _RTLD_EPILOGUE (ENTRY_POINT) "\
> + .previous");
>
new file mode 100644
@@ -0,0 +1,52 @@
+/* longjmp.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <sysdep.h>
+#include <sys/asm.h>
+
+ENTRY (__longjmp)
+ REG_L ra, a0, 0*SZREG
+ REG_L sp, a0, 1*SZREG
+ REG_L x, a0, 2*SZREG
+ REG_L fp, a0, 3*SZREG
+ REG_L s0, a0, 4*SZREG
+ REG_L s1, a0, 5*SZREG
+ REG_L s2, a0, 6*SZREG
+ REG_L s3, a0, 7*SZREG
+ REG_L s4, a0, 8*SZREG
+ REG_L s5, a0, 9*SZREG
+ REG_L s6, a0, 10*SZREG
+ REG_L s7, a0, 11*SZREG
+ REG_L s8, a0, 12*SZREG
+
+#ifndef __loongarch_soft_float
+ FREG_L $f24, a0, 13*SZREG + 0*SZFREG
+ FREG_L $f25, a0, 13*SZREG + 1*SZFREG
+ FREG_L $f26, a0, 13*SZREG + 2*SZFREG
+ FREG_L $f27, a0, 13*SZREG + 3*SZFREG
+ FREG_L $f28, a0, 13*SZREG + 4*SZFREG
+ FREG_L $f29, a0, 13*SZREG + 5*SZFREG
+ FREG_L $f30, a0, 13*SZREG + 6*SZFREG
+ FREG_L $f31, a0, 13*SZREG + 7*SZFREG
+#endif
+
+ sltui a0,a1,1
+ ADD a0, a0, a1 # a0 = (a1 == 0) ? 1 : a1
+ jirl zero,ra,0
+
+END (__longjmp)
new file mode 100644
@@ -0,0 +1,11 @@
+#ifndef _BITS_ENDIANNESS_H
+#define _BITS_ENDIANNESS_H 1
+
+#ifndef _BITS_ENDIAN_H
+#error "Never use <bits/endianness.h> directly; include <endian.h> instead."
+#endif
+
+/* LoongArch is little-endian. */
+#define __BYTE_ORDER __LITTLE_ENDIAN
+
+#endif /* bits/endianness.h */
new file mode 100644
@@ -0,0 +1,58 @@
+/* Machine-specific declarations for dynamic linker interface.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef _LINK_H
+#error "Never include <bits/link.h> directly; use <link.h> instead."
+#endif
+
+typedef struct La_loongarch_regs
+{
+ unsigned long int lr_reg[8]; /* a0 - a7 */
+ double lr_fpreg[8]; /* fa0 - fa7 */
+ unsigned long int lr_ra;
+ unsigned long int lr_sp;
+} La_loongarch_regs;
+
+/* Return values for calls from PLT on LoongArch. */
+typedef struct La_loongarch_retval
+{
+ unsigned long int lrv_a0;
+ unsigned long int lrv_a1;
+ double lrv_fa0;
+ double lrv_fa1;
+} La_loongarch_retval;
+
+__BEGIN_DECLS
+
+extern ElfW (Addr) la_loongarch_gnu_pltenter (ElfW (Sym) * __sym,
+ unsigned int __ndx,
+ uintptr_t *__refcook,
+ uintptr_t *__defcook,
+ La_loongarch_regs *__regs,
+ unsigned int *__flags,
+ const char *__symname,
+ long int *__framesizep);
+extern unsigned int la_loongarch_gnu_pltexit (ElfW (Sym) * __sym,
+ unsigned int __ndx,
+ uintptr_t *__refcook,
+ uintptr_t *__defcook,
+ const La_loongarch_regs *__inregs,
+ La_loongarch_retval *__outregs,
+ const char *__symname);
+
+__END_DECLS
new file mode 100644
@@ -0,0 +1,42 @@
+/* Define the machine-dependent type `jmp_buf'.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef _LOONGARCH_BITS_SETJMP_H
+#define _LOONGARCH_BITS_SETJMP_H
+
+typedef struct __jmp_buf_internal_tag
+{
+ /* Program counter. */
+ long int __pc;
+ /* Stack pointer. */
+ long int __sp;
+ /* Reserved */
+ long int __x;
+ /* Frame pointer. */
+ long int __fp;
+ /* Callee-saved registers. */
+ long int __regs[9];
+
+#ifndef __loongarch_soft_float
+ /* Callee-saved floating point registers. */
+ double __fpregs[8];
+#endif
+
+} __jmp_buf[1];
+
+#endif /* _LOONGARCH_BITS_SETJMP_H */
new file mode 100644
@@ -0,0 +1 @@
+/* _setjmp is implemented in setjmp.S. */
new file mode 100644
@@ -0,0 +1 @@
+/* setjmp is implemented in setjmp.S. */
new file mode 100644
@@ -0,0 +1,362 @@
+/* Machine-dependent ELF dynamic relocation inline functions.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef dl_machine_h
+#define dl_machine_h
+
+#define ELF_MACHINE_NAME "LoongArch"
+
+#include <entry.h>
+#include <elf/elf.h>
+#include <sys/asm.h>
+#include <dl-tls.h>
+#include <dl-static-tls.h>
+#include <dl-machine-rel.h>
+
+#ifndef _RTLD_PROLOGUE
+# define _RTLD_PROLOGUE(entry) \
+ ".globl\t" __STRING (entry) "\n\t" \
+ ".type\t" __STRING (entry) ", @function\n\t" \
+ CFI_STARTPROC "\n" \
+ __STRING (entry) ":\n"
+#endif
+
+#ifndef _RTLD_EPILOGUE
+# define _RTLD_EPILOGUE(entry) \
+ CFI_ENDPROC "\n\t" \
+ ".size\t" __STRING (entry) ", . - " __STRING (entry) "\n"
+#endif
+
+#define ELF_MACHINE_JMP_SLOT R_LARCH_JUMP_SLOT
+#define ELF_MACHINE_IRELATIVE R_LARCH_IRELATIVE
+
+#define elf_machine_type_class(type) \
+ ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \
+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \
+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \
+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \
+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \
+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \
+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \
+ | (ELF_RTYPE_CLASS_COPY * ((type) == R_LARCH_COPY)))
+
+#define ELF_MACHINE_NO_REL 1
+#define ELF_MACHINE_NO_RELA 0
+
+/* Return nonzero iff ELF header is compatible with the running host. */
+static inline int __attribute_used__
+elf_machine_matches_host (const ElfW (Ehdr) * ehdr)
+{
+ /* We can only run LoongArch binaries. */
+ if (ehdr->e_machine != EM_LOONGARCH)
+ return 0;
+
+ return 1;
+}
+
+/* Runtime address of .got */
+#define _GLOBAL_OFFSET_TABLE_ \
+ ({ \
+ ElfW (Addr) * r; \
+ asm("la.pcrel %0, _GLOBAL_OFFSET_TABLE_" : "=r"(r)); \
+ r; \
+ })
+
+/* Return the link-time address of _DYNAMIC. */
+static inline ElfW (Addr) elf_machine_dynamic (void)
+{
+ return _GLOBAL_OFFSET_TABLE_[0];
+}
+
+#define STRINGXP(X) __STRING (X)
+#define STRINGXV(X) STRINGV_ (X)
+#define STRINGV_(...) #__VA_ARGS__
+
+/* Return the run-time load address of the shared object. */
+static inline ElfW (Addr) elf_machine_load_address (void)
+{
+ ElfW (Addr) got_linktime_addr;
+ asm("la.got %0, _GLOBAL_OFFSET_TABLE_"
+ /* Link-time address in GOT entry before runtime relocation */
+ : "=r"(got_linktime_addr));
+ return (ElfW (Addr)) _GLOBAL_OFFSET_TABLE_ - got_linktime_addr;
+}
+
+/* Initial entry point code for the dynamic linker.
+ The C function `_dl_start' is the real entry point;
+ its return value is the user program's entry point. */
+
+#define RTLD_START \
+ asm(".text\n\
+ " _RTLD_PROLOGUE (ENTRY_POINT) "\
+ .cfi_label .Ldummy \n\
+ " CFI_UNDEFINED (1) " \n\
+ or $a0, $sp, $zero \n\
+ bl _dl_start \n\
+ # Stash user entry point in s0. \n\
+ or $s0, $v0, $zero \n\
+ # See if we were run as a command with the executable file \n\
+ # name as an extra leading argument. \n\
+ la $a0, _dl_skip_args \n\
+ ld.w $a0, $a0, 0 \n\
+ # Load the original argument count. \n\
+ ld.d $a1, $sp, 0 \n\
+ # Subtract _dl_skip_args from it. \n\
+ sub.d $a1, $a1, $a0 \n\
+ # Adjust the stack pointer to skip _dl_skip_args words. \n\
+ slli.d $a0, $a0, 3 \n\
+ add.d $sp, $sp, $a0 \n\
+ # Save back the modified argument count. \n\
+ st.d $a1, $sp, 0 \n\
+ # Call _dl_init (struct link_map *main_map, int argc, char **argv, \
+ char **env) \n\
+ la $a0, _rtld_local \n\
+ ld.d $a0, $a0, 0 \n\
+ addi.d $a2, $sp, 8 \n\
+ slli.d $a3, $a1, 3 \n\
+ add.d $a3, $a3, $a2 \n\
+ addi.d $a3, $a3, 8 \n\
+ # Adjust $sp for 16-aligned \n\
+ srli.d $t0, $sp, 4 \n\
+ slli.d $t0, $t0, 4 \n\
+ ori $t1, $sp, 0 \n\
+ addi.d $sp, $t0, -32 \n\
+ st.d $t1, $sp, 24 \n\
+ # Call the function to run the initializers. \n\
+ bl _dl_init \n\
+ # Pass our finalizer function to _start. \n\
+ ld.d $sp, $sp, 24 \n\
+ la $a0, _dl_fini \n\
+ # Jump to the user entry point. \n\
+ jirl $zero, $s0, 0 \n\
+ " _RTLD_EPILOGUE (ENTRY_POINT) "\
+ .previous");
+
+/* Names of the architecture-specific auditing callback functions. */
+#define ARCH_LA_PLTENTER loongarch_gnu_pltenter
+#define ARCH_LA_PLTEXIT loongarch_gnu_pltexit
+
+/* Bias .got.plt entry by the offset requested by the PLT header. */
+#define elf_machine_plt_value(map, reloc, value) (value)
+
+static inline ElfW (Addr)
+ elf_machine_fixup_plt (struct link_map *map, lookup_t t,
+ const ElfW (Sym) * refsym, const ElfW (Sym) * sym,
+ const ElfW (Rela) * reloc, ElfW (Addr) * reloc_addr,
+ ElfW (Addr) value)
+{
+ return *reloc_addr = value;
+}
+
+#endif /* !dl_machine_h */
+
+#ifdef RESOLVE_MAP
+
+/* Perform a relocation described by R_INFO at the location pointed to
+ by RELOC_ADDR. SYM is the relocation symbol specified by R_INFO and
+ MAP is the object containing the reloc. */
+
+static inline void __attribute__ ((always_inline))
+elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[],
+ const ElfW (Rela) * reloc,
+ const ElfW (Sym) * sym,
+ const struct r_found_version *version,
+ void *const reloc_addr, int skip_ifunc)
+{
+ ElfW (Addr) r_info = reloc->r_info;
+ const unsigned long int r_type = ELFW (R_TYPE) (r_info);
+ ElfW (Addr) *addr_field = (ElfW (Addr) *) reloc_addr;
+ const ElfW (Sym) *const __attribute__ ((unused)) refsym = sym;
+ struct link_map *sym_map = RESOLVE_MAP (map, scope, &sym, version, r_type);
+ ElfW (Addr) value = 0;
+ if (sym_map != NULL)
+ value = SYMBOL_ADDRESS (sym_map, sym, true) + reloc->r_addend;
+
+ if (sym != NULL
+ && __builtin_expect (ELFW (ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, 0)
+ && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1)
+ && __builtin_expect (!skip_ifunc, 1))
+ value = ((ElfW (Addr) (*) (int)) value) (GLRO (dl_hwcap));
+
+ switch (r_type)
+ {
+#ifndef RTLD_BOOTSTRAP
+ case __WORDSIZE == 64 ? R_LARCH_TLS_DTPMOD64:
+ R_LARCH_TLS_DTPMOD32:
+ if (sym_map)
+ *addr_field = sym_map->l_tls_modid;
+ break;
+
+ case __WORDSIZE == 64 ? R_LARCH_TLS_DTPREL64:
+ R_LARCH_TLS_DTPREL32:
+ if (sym != NULL)
+ *addr_field = TLS_DTPREL_VALUE (sym) + reloc->r_addend;
+ break;
+
+ case __WORDSIZE == 64 ? R_LARCH_TLS_TPREL64:
+ R_LARCH_TLS_TPREL32:
+ if (sym != NULL)
+ {
+ CHECK_STATIC_TLS (map, sym_map);
+ *addr_field = TLS_TPREL_VALUE (sym_map, sym) + reloc->r_addend;
+ }
+ break;
+
+ case R_LARCH_COPY:
+ {
+ if (__glibc_unlikely (sym == NULL))
+ /* This can happen in trace mode if an object could not be
+ found. */
+ break;
+
+ /* Handle TLS copy relocations. */
+ if (__glibc_unlikely (ELFW (ST_TYPE) (sym->st_info) == STT_TLS))
+ {
+ /* There's nothing to do if the symbol is in .tbss. */
+ if (__glibc_likely (sym->st_value
+ >= sym_map->l_tls_initimage_size))
+ break;
+ value += (ElfW (Addr)) sym_map->l_tls_initimage - sym_map->l_addr;
+ }
+
+ size_t size = sym->st_size;
+ if (__glibc_unlikely (sym->st_size != refsym->st_size))
+ {
+ const char *strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
+ if (sym->st_size > refsym->st_size)
+ size = refsym->st_size;
+ if (sym->st_size > refsym->st_size || GLRO (dl_verbose))
+ _dl_error_printf ("\
+ %s: Symbol `%s' has different size in shared object, consider re-linking\n",
+ rtld_progname ?: "<program name unknown>",
+ strtab + refsym->st_name);
+ }
+
+ memcpy (reloc_addr, (void *) value, size);
+ break;
+ }
+#endif
+
+#if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
+ case R_LARCH_RELATIVE:
+ {
+#if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC
+ /* This is defined in rtld.c, but nowhere in the static libc.a;
+ make the reference weak so static programs can still link.
+ This declaration cannot be done when compiling rtld.c
+ (i.e. #ifdef RTLD_BOOTSTRAP) because rtld.c contains the
+ common defn for _dl_rtld_map, which is incompatible with a
+ weak decl in the same file. */
+#ifndef SHARED
+ weak_extern (GL (dl_rtld_map));
+#endif
+ if (map != &GL (dl_rtld_map)) /* Already done in rtld itself. */
+#endif
+ *addr_field = map->l_addr + reloc->r_addend;
+ break;
+ }
+#endif
+
+ case R_LARCH_JUMP_SLOT:
+ case __WORDSIZE == 64 ? R_LARCH_64:
+ R_LARCH_32:
+ *addr_field = value;
+ break;
+
+ case R_LARCH_IRELATIVE:
+ value = map->l_addr + reloc->r_addend;
+ if (__glibc_likely (!skip_ifunc))
+ value = ((ElfW (Addr) (*) (void)) value) ();
+ *addr_field = value;
+ break;
+
+ case R_LARCH_NONE:
+ break;
+
+ default:
+ _dl_reloc_bad_type (map, r_type, 0);
+ break;
+ }
+}
+
+static inline void __attribute__ ((always_inline))
+elf_machine_rela_relative (ElfW (Addr) l_addr, const ElfW (Rela) * reloc,
+ void *const reloc_addr)
+{
+ *(ElfW (Addr) *) reloc_addr = l_addr + reloc->r_addend;
+}
+
+static inline void __attribute__ ((always_inline))
+elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem *scope[],
+ ElfW (Addr) l_addr,
+ const ElfW (Rela) * reloc, int skip_ifunc)
+{
+ ElfW (Addr) *const reloc_addr = (void *) (l_addr + reloc->r_offset);
+ const unsigned int r_type = ELFW (R_TYPE) (reloc->r_info);
+
+ /* Check for unexpected PLT reloc type. */
+ if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT))
+ {
+ if (__glibc_unlikely (map->l_mach.plt == 0))
+ {
+ if (l_addr)
+ *reloc_addr += l_addr;
+ }
+ else
+ *reloc_addr = map->l_mach.plt;
+ }
+ else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE))
+ {
+ ElfW (Addr) *value = (void *) (l_addr + reloc->r_addend);
+ if (__glibc_likely (!skip_ifunc))
+ value = (ElfW (Addr) *) ((ElfW (Addr) (*) (void)) value) ();
+ *reloc_addr = (ElfW (Addr)) value;
+ }
+ else
+ _dl_reloc_bad_type (map, r_type, 1);
+}
+
+/* Set up the loaded object described by L so its stub function
+ will jump to the on-demand fixup code __dl_runtime_resolve. */
+
+static inline int __attribute__ ((always_inline))
+elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[],
+ int lazy, int profile)
+{
+#ifndef RTLD_BOOTSTRAP
+ /* If using PLTs, fill in the first two entries of .got.plt. */
+ if (l->l_info[DT_JMPREL])
+ {
+ extern void _dl_runtime_resolve (void)
+ __attribute__ ((visibility ("hidden")));
+ ElfW (Addr) *gotplt = (ElfW (Addr) *) D_PTR (l, l_info[DT_PLTGOT]);
+ /* If a library is prelinked but we have to relocate anyway,
+ we have to be able to undo the prelinking of .got.plt.
+ The prelinker saved the address of .plt for us here. */
+ if (gotplt[1])
+ l->l_mach.plt = gotplt[1] + l->l_addr;
+ gotplt[0] = (ElfW (Addr)) & _dl_runtime_resolve;
+ gotplt[1] = (ElfW (Addr)) l;
+ }
+#endif
+
+ return lazy;
+}
+
+#endif /* RESOLVE_MAP */
new file mode 100644
@@ -0,0 +1,91 @@
+/* PLT trampolines.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <sysdep.h>
+#include <sys/asm.h>
+
+/* Assembler veneer called from the PLT header code for lazy loading.
+ The PLT header passes its own args in t0-t2. */
+
+#ifdef __loongarch_soft_float
+# define FRAME_SIZE (-((-10 * SZREG) & ALMASK))
+#else
+# define FRAME_SIZE (-((-10 * SZREG - 8 * SZFREG) & ALMASK))
+#endif
+
+ENTRY (_dl_runtime_resolve)
+
+ /* Save arguments to stack. */
+ ADDI sp, sp, -FRAME_SIZE
+
+ REG_S ra, sp, 9*SZREG
+ REG_S a0, sp, 1*SZREG
+ REG_S a1, sp, 2*SZREG
+ REG_S a2, sp, 3*SZREG
+ REG_S a3, sp, 4*SZREG
+ REG_S a4, sp, 5*SZREG
+ REG_S a5, sp, 6*SZREG
+ REG_S a6, sp, 7*SZREG
+ REG_S a7, sp, 8*SZREG
+
+#ifndef __loongarch_soft_float
+ FREG_S fa0, sp, 10*SZREG + 0*SZFREG
+ FREG_S fa1, sp, 10*SZREG + 1*SZFREG
+ FREG_S fa2, sp, 10*SZREG + 2*SZFREG
+ FREG_S fa3, sp, 10*SZREG + 3*SZFREG
+ FREG_S fa4, sp, 10*SZREG + 4*SZFREG
+ FREG_S fa5, sp, 10*SZREG + 5*SZFREG
+ FREG_S fa6, sp, 10*SZREG + 6*SZFREG
+ FREG_S fa7, sp, 10*SZREG + 7*SZFREG
+#endif
+
+ /* Update .got.plt and obtain runtime address of callee */
+ SLLI a1, t1, 1
+ or a0, t0, zero
+ ADD a1, a1, t1
+ la a2, _dl_fixup
+ jirl ra, a2, 0
+ or t1, v0, zero
+
+ /* Restore arguments from stack. */
+ REG_L ra, sp, 9*SZREG
+ REG_L a0, sp, 1*SZREG
+ REG_L a1, sp, 2*SZREG
+ REG_L a2, sp, 3*SZREG
+ REG_L a3, sp, 4*SZREG
+ REG_L a4, sp, 5*SZREG
+ REG_L a5, sp, 6*SZREG
+ REG_L a6, sp, 7*SZREG
+ REG_L a7, sp, 8*SZREG
+
+#ifndef __loongarch_soft_float
+ FREG_L fa0, sp, 10*SZREG + 0*SZFREG
+ FREG_L fa1, sp, 10*SZREG + 1*SZFREG
+ FREG_L fa2, sp, 10*SZREG + 2*SZFREG
+ FREG_L fa3, sp, 10*SZREG + 3*SZFREG
+ FREG_L fa4, sp, 10*SZREG + 4*SZFREG
+ FREG_L fa5, sp, 10*SZREG + 5*SZFREG
+ FREG_L fa6, sp, 10*SZREG + 6*SZFREG
+ FREG_L fa7, sp, 10*SZREG + 7*SZFREG
+#endif
+
+ ADDI sp, sp, FRAME_SIZE
+
+ /* Invoke the callee. */
+ jirl zero, t1, 0
+END (_dl_runtime_resolve)
new file mode 100644
@@ -0,0 +1,22 @@
+/* Private macros for accessing __jmp_buf contents.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <jmpbuf-unwind.h>
+
+/* Helper for generic ____longjmp_chk(). */
+#define JB_FRAME_ADDRESS(buf) ((void *) _jmpbuf_sp (buf))
new file mode 100644
@@ -0,0 +1,45 @@
+/* Examine __jmp_buf for unwinding frames.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <setjmp.h>
+#include <stdint.h>
+#include <unwind.h>
+#include <sysdep.h>
+
+/* Test if longjmp to JMPBUF would unwind the frame
+ containing a local variable at ADDRESS. */
+#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \
+ ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp))
+
+#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
+ _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
+
+static inline uintptr_t __attribute__ ((unused)) _jmpbuf_sp (__jmp_buf regs)
+{
+ uintptr_t sp = regs[0].__sp;
+#ifdef PTR_DEMANGLE
+ PTR_DEMANGLE (sp);
+#endif
+ return sp;
+}
+
+#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
+ ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
+
+/* We use the normal longjmp for unwinding. */
+#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)
new file mode 100644
@@ -0,0 +1,41 @@
+/* Run-time dynamic linker data structures for loaded ELF shared objects.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef _LOONGARCH_LDSODEFS_H
+#define _LOONGARCH_LDSODEFS_H 1
+
+#include <elf.h>
+
+struct La_loongarch_regs;
+struct La_loongarch_retval;
+
+#define ARCH_PLTENTER_MEMBERS \
+ ElfW (Addr) (*loongarch_gnu_pltenter) (ElfW (Sym) *, unsigned int, \
+ uintptr_t *, uintptr_t *, \
+ const struct La_loongarch_regs *, \
+ unsigned int *, const char *name, \
+ long int *framesizep);
+
+#define ARCH_PLTEXIT_MEMBERS \
+ unsigned int (*loongarch_gnu_pltexit) (ElfW (Sym) *, unsigned int, \
+ uintptr_t *, uintptr_t *, const struct La_loongarch_regs *, \
+ struct La_loongarch_retval *, const char *);
+
+#include_next <ldsodefs.h>
+
+#endif
new file mode 100644
@@ -0,0 +1,22 @@
+/* Definition of link_map_machine.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+struct link_map_machine
+{
+ ElfW (Addr) plt; /* Address of .plt. */
+};
new file mode 100644
@@ -0,0 +1,37 @@
+/* LoongArch definitions for profiling support.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+/* Accept 'frompc' address as argument from the function that calls
+ _mcount for profiling. Use __builtin_return_address (0)
+ for the 'selfpc' address. */
+
+#include <sysdep.h>
+
+static void mcount_internal (unsigned long int frompc,
+ unsigned long int selfpc);
+
+#define _MCOUNT_DECL(frompc, selfpc) \
+ static inline void mcount_internal (unsigned long int frompc, \
+ unsigned long int selfpc)
+
+#define MCOUNT \
+ void _mcount (void *frompc) \
+ { \
+ mcount_internal ((unsigned long int) frompc, \
+ (unsigned long int) RETURN_ADDRESS (0)); \
+ }
new file mode 100644
@@ -0,0 +1,66 @@
+/* setjmp for LoongArch.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <sysdep.h>
+#include <sys/asm.h>
+
+ENTRY (_setjmp)
+ li.w a1,0
+ b __sigsetjmp
+END (_setjmp)
+
+ENTRY (setjmp)
+ li.w a1,1
+END (setjmp)
+
+ENTRY (__sigsetjmp)
+ REG_S ra, a0, 0*SZREG
+ REG_S sp, a0, 1*SZREG
+ REG_S x, a0, 2*SZREG
+ REG_S fp, a0, 3*SZREG
+ REG_S s0, a0, 4*SZREG
+ REG_S s1, a0, 5*SZREG
+ REG_S s2, a0, 6*SZREG
+ REG_S s3, a0, 7*SZREG
+ REG_S s4, a0, 8*SZREG
+ REG_S s5, a0, 9*SZREG
+ REG_S s6, a0, 10*SZREG
+ REG_S s7, a0, 11*SZREG
+ REG_S s8, a0, 12*SZREG
+
+#ifndef __loongarch_soft_float
+ FREG_S $f24, a0, 13*SZREG + 0*SZFREG
+ FREG_S $f25, a0, 13*SZREG + 1*SZFREG
+ FREG_S $f26, a0, 13*SZREG + 2*SZFREG
+ FREG_S $f27, a0, 13*SZREG + 3*SZFREG
+ FREG_S $f28, a0, 13*SZREG + 4*SZFREG
+ FREG_S $f29, a0, 13*SZREG + 5*SZFREG
+ FREG_S $f30, a0, 13*SZREG + 6*SZFREG
+ FREG_S $f31, a0, 13*SZREG + 7*SZFREG
+#endif
+
+#if !IS_IN (libc) && IS_IN(rtld)
+ li.w v0, 0
+ jirl zero,ra,0
+#else
+ b __sigjmp_save
+#endif
+END (__sigsetjmp)
+
+hidden_def (__sigsetjmp)
+weak_alias (_setjmp, __GI__setjmp)
new file mode 100644
@@ -0,0 +1,50 @@
+/* Override generic sotruss-lib.c to define actual functions for LoongArch.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#define HAVE_ARCH_PLTENTER
+#define HAVE_ARCH_PLTEXIT
+
+#include <elf/sotruss-lib.c>
+
+ElfW (Addr)
+la_loongarch_gnu_pltenter (ElfW (Sym) * sym __attribute__ ((unused)),
+ unsigned int ndx __attribute__ ((unused)),
+ uintptr_t *refcook, uintptr_t *defcook,
+ La_loongarch_regs *regs, unsigned int *flags,
+ const char *symname, long int *framesizep)
+{
+ print_enter (refcook, defcook, symname, regs->lr_reg[0], regs->lr_reg[1],
+ regs->lr_reg[2], *flags);
+
+ /* No need to copy anything, we will not need the parameters in any case. */
+ *framesizep = 0;
+
+ return sym->st_value;
+}
+
+unsigned int
+la_loongarch_gnu_pltexit (ElfW (Sym) * sym, unsigned int ndx,
+ uintptr_t *refcook, uintptr_t *defcook,
+ const struct La_loongarch_regs *inregs,
+ struct La_loongarch_retval *outregs,
+ const char *symname)
+{
+ print_exit (refcook, defcook, symname, outregs->lrv_a0);
+
+ return 0;
+}
new file mode 100644
@@ -0,0 +1,67 @@
+/* Startup code compliant to the ELF LoongArch ABI.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#define __ASSEMBLY__ 1
+#include <entry.h>
+#include <sys/asm.h>
+
+/* The entry point's job is to call __libc_start_main. Per the ABI,
+ a0 contains the address of a function to be passed to atexit.
+ __libc_start_main wants this in a5. */
+
+/*
+int
+__libc_start_main (int (*main) (int, char **, char **),
+ int argc,
+ char **argv,
+ __typeof (main) init,
+ void (*fini) (void),
+ void (*rtld_fini) (void),
+ void *stack_end);
+ */
+
+ENTRY (ENTRY_POINT)
+
+/* Terminate call stack by noting ra is undefined. Use a dummy
+ .cfi_label to force starting the FDE. */
+ .cfi_label .Ldummy
+ cfi_undefined (1)
+ or a5, a0, zero /* rtld_fini */
+
+/* We must get symbol main through GOT table, since main may not be local.
+ For instance: googletest defines main in dynamic library. */
+ la.got a0, t0, main
+ REG_L a1, sp, 0
+ ADDI a2, sp, SZREG
+
+ /* Adjust $sp for 16-aligned */
+ SRLI sp, sp, 4
+ SLLI sp, sp, 4
+
+ move a3, zero /* used to be init */
+ move a4, zero /* used to be fini */
+ or a6, sp, zero /* stack_end */
+
+ la.got ra, t0, __libc_start_main
+ jirl ra, ra, 0
+
+ la.got ra, t0, abort
+ jirl ra, ra, 0
+END (ENTRY_POINT)
+
new file mode 100644
@@ -0,0 +1,59 @@
+/* Miscellaneous macros.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef _SYS_ASM_H
+#define _SYS_ASM_H
+
+#include <sys/regdef.h>
+#include <sysdeps/generic/sysdep.h>
+
+/* Macros to handle different pointer/register sizes for 32/64-bit code. */
+#define SZREG 8
+#define SZFREG 8
+#define REG_L ld.d
+#define REG_S st.d
+#define SRLI srli.d
+#define SLLI slli.d
+#define ADDI addi.d
+#define ADD add.d
+#define BSTRINS bstrins.d
+#define LI li.d
+#define FREG_L fld.d
+#define FREG_S fst.d
+
+/* Declare leaf routine. */
+#define LEAF(symbol) \
+ .text; \
+ .globl symbol; \
+ .align 3; \
+ cfi_startproc; \
+ .type symbol, @function; \
+ symbol:
+
+#define ENTRY(symbol) LEAF (symbol)
+
+/* Mark end of function. */
+#undef END
+#define END(function) \
+ cfi_endproc; \
+ .size function, .- function;
+
+/* Stack alignment. */
+#define ALMASK ~15
+
+#endif /* sys/asm.h */
new file mode 100644
@@ -0,0 +1,23 @@
+/* Definitions for testing PLT entry/exit auditing.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#define pltenter la_loongarch_gnu_pltenter
+#define pltexit la_loongarch_gnu_pltexit
+#define La_regs La_loongarch_regs
+#define La_retval La_loongarch_retval
+#define int_retval lrv_a0
new file mode 100644
@@ -0,0 +1,26 @@
+/* ldconfig default paths and libraries.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <sysdeps/generic/ldconfig.h>
+
+#define SYSDEP_KNOWN_INTERPRETER_NAMES \
+ { "/lib64/ld-linux-loongarch-lp64d.so.1", FLAG_ELF_LIBC6 },
+
+#define SYSDEP_KNOWN_LIBRARY_NAMES \
+ { "libc.so.6", FLAG_ELF_LIBC6 }, \
+ { "libm.so.6", FLAG_ELF_LIBC6 },