new file mode 100644
@@ -0,0 +1,48 @@
+/* Machine-dependent ELF indirect 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_IREL_H
+#define _DL_IREL_H
+
+#include <stdio.h>
+#include <unistd.h>
+
+#define ELF_MACHINE_IRELA 1
+
+static inline ElfW (Addr) __attribute ((always_inline))
+elf_ifunc_invoke (ElfW (Addr) addr)
+{
+ return ((ElfW (Addr) (*) (void)) (addr)) ();
+}
+
+static inline void __attribute ((always_inline))
+elf_irela (const ElfW (Rela) * reloc)
+{
+ ElfW (Addr) *const reloc_addr = (void *) reloc->r_offset;
+ const unsigned long int r_type = ELFW (R_TYPE) (reloc->r_info);
+
+ if (__glibc_likely (r_type == R_LARCH_IRELATIVE))
+ {
+ ElfW (Addr) value = elf_ifunc_invoke (reloc->r_addend);
+ *reloc_addr = value;
+ }
+ else
+ __libc_fatal ("Unexpected reloc type in static binary.\n");
+}
+
+#endif /* dl-irel.h */
new file mode 100644
@@ -0,0 +1,32 @@
+/* pthread machine parameter definitions.
+ 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/>. */
+
+/* Default stack size. */
+#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
+
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
+/* Required stack pointer alignment at beginning. */
+#define STACK_ALIGN 16
+
+/* Minimal stack size after allocating thread descriptor and guard size. */
+#define MINIMAL_REST_STACK 2048
+
+/* Location of current stack frame. */
+#define CURRENT_STACK_FRAME __builtin_frame_address (0)
new file mode 100644
@@ -0,0 +1,61 @@
+/* O_*, F_*, FD_* bit values for the generic Linux/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/>. */
+
+#ifndef _FCNTL_H
+#error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
+#endif
+
+#include <bits/wordsize.h>
+
+/* In 64-bit ISA files are always with 64bit off_t and F_*LK64 are the same as
+ non-64-bit versions. It will need to be revised for 128-bit. */
+#if __WORDSIZE == 64
+#define __O_LARGEFILE 0
+
+#define F_GETLK64 5 /* Get record locking info. */
+#define F_SETLK64 6 /* Set record locking info (non-blocking). */
+#define F_SETLKW64 7 /* Set record locking info (blocking). */
+#endif
+
+struct flock
+{
+ short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
+ short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
+#ifndef __USE_FILE_OFFSET64
+ __off_t l_start; /* Offset where the lock begins. */
+ __off_t l_len; /* Size of the locked area; zero means until EOF. */
+#else
+ __off64_t l_start; /* Offset where the lock begins. */
+ __off64_t l_len; /* Size of the locked area; zero means until EOF. */
+#endif
+ __pid_t l_pid; /* Process holding the lock. */
+};
+
+#ifdef __USE_LARGEFILE64
+struct flock64
+{
+ short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
+ short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
+ __off64_t l_start; /* Offset where the lock begins. */
+ __off64_t l_len; /* Size of the locked area; zero means until EOF. */
+ __pid_t l_pid; /* Process holding the lock. */
+};
+#endif
+
+/* Include generic Linux declarations. */
+#include <bits/fcntl-linux.h>
new file mode 100644
@@ -0,0 +1,52 @@
+/* Types for registers for sys/procfs.h.
+ 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_PROCFS_H
+# error "Never include <bits/procfs.h> directly; use <sys/procfs.h> instead."
+#endif
+
+/* Type for a general-purpose register. */
+typedef __uint64_t elf_greg_t;
+
+/* And the whole bunch of them. We could have used `struct
+ pt_regs' directly in the typedef, but tradition says that
+ the register set is an array, which does have some peculiar
+ semantics, so leave it that way. */
+#define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof (elf_greg_t))
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+
+#define ELF_NFPREG 34 /* 32 FPRs + 8-byte byte-vec for fcc + 4-byte FCR */
+typedef union
+{
+ double d;
+ float f;
+} elf_fpreg_t;
+typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
+
+typedef union
+{
+ double d[2];
+ float f[4];
+} __attribute__ ((__aligned__ (16))) elf_lsxregset_t[32];
+
+typedef union
+{
+ double d[4];
+ float f[8];
+} __attribute__ ((__aligned__ (32))) elf_lasxregset_t[32];
new file mode 100644
@@ -0,0 +1,20 @@
+/* Definition of PTHREAD_STACK_MIN. LoongArch Linux version.
+ 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/>. */
+
+/* Minimum size for a thread. At least two pages with 64k pages. */
+#define PTHREAD_STACK_MIN 131072
new file mode 100644
@@ -0,0 +1,32 @@
+/* sigstack, sigaltstack definitions.
+ 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 _BITS_SIGSTACK_H
+#define _BITS_SIGSTACK_H 1
+
+#if !defined _SIGNAL_H && !defined _SYS_UCONTEXT_H
+# error "Never include this file directly. Use <signal.h> instead"
+#endif
+
+/* Minimum stack size for a signal handler. */
+#define MINSIGSTKSZ 4096
+
+/* System default stack size. */
+#define SIGSTKSZ 16384
+
+#endif /* bits/sigstack.h */
new file mode 100644
@@ -0,0 +1,59 @@
+/* Save current context.
+ 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 "ucontext-macros.h"
+
+/* int getcontext (ucontext_t *ucp) */
+
+ .text
+LEAF (__getcontext)
+ SAVE_INT_REG (ra, 1, a0)
+ SAVE_INT_REG (sp, 3, a0)
+ SAVE_INT_REG (zero, 4, a0) /* return 0 by overwriting a0. */
+ SAVE_INT_REG (x, 21, a0)
+ SAVE_INT_REG (fp, 22, a0)
+ SAVE_INT_REG (s0, 23, a0)
+ SAVE_INT_REG (s1, 24, a0)
+ SAVE_INT_REG (s2, 25, a0)
+ SAVE_INT_REG (s3, 26, a0)
+ SAVE_INT_REG (s4, 27, a0)
+ SAVE_INT_REG (s5, 28, a0)
+ SAVE_INT_REG (s6, 29, a0)
+ SAVE_INT_REG (s7, 30, a0)
+ SAVE_INT_REG (s8, 31, a0)
+ st.d ra, a0, MCONTEXT_PC
+
+/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
+ li.d a3, _NSIG8
+ li.d a2, UCONTEXT_SIGMASK
+ add.d a2, a2, a0
+ ori a1, zero,0
+ li.d a0, SIG_BLOCK
+
+ li.d a7, SYS_ify (rt_sigprocmask)
+ syscall 0
+ blt a0, zero, 99f
+
+ jirl $r0, $r1, 0
+
+99:
+ b __syscall_error
+
+PSEUDO_END (__getcontext)
+
+weak_alias (__getcontext, getcontext)
new file mode 100644
@@ -0,0 +1,12 @@
+# See scripts/check-localplt.awk for how this file is processed.
+# PLT use is required for the malloc family and for matherr because
+# users can define their own functions and have library internals call them.
+libc.so: calloc
+libc.so: free
+libc.so: malloc
+libc.so: realloc
+# The TLS-enabled version of these functions is interposed from libc.so.
+ld.so: _dl_signal_error
+ld.so: _dl_catch_error
+ld.so: _dl_signal_exception
+ld.so: _dl_catch_exception
new file mode 100644
@@ -0,0 +1,79 @@
+/* Create new context.
+ 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>
+#include <sys/ucontext.h>
+#include <stdarg.h>
+#include <assert.h>
+
+void
+__makecontext (ucontext_t *ucp, void (*func) (void), int argc, long int a0,
+ long int a1, long int a2, long int a3, long int a4, ...)
+{
+ extern void __start_context (void) attribute_hidden;
+ long int i, sp;
+
+ _Static_assert(LARCH_REG_NARGS == 8,
+ "__makecontext assumes 8 argument registers");
+
+ /* Set up the stack. */
+ sp = ((long int) ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size) & ALMASK;
+
+ /* Set up the register context.
+ ra = s0 = 0, terminating the stack for backtracing purposes.
+ s1 = the function we must call.
+ s2 = the subsequent context to run. */
+ ucp->uc_mcontext.__gregs[LARCH_REG_RA] = 0;
+ ucp->uc_mcontext.__gregs[LARCH_REG_S0] = 0;
+ ucp->uc_mcontext.__gregs[LARCH_REG_S1] = (long int) func;
+ ucp->uc_mcontext.__gregs[LARCH_REG_S2] = (long int) ucp->uc_link;
+ ucp->uc_mcontext.__gregs[LARCH_REG_SP] = sp;
+ ucp->uc_mcontext.__pc = (long int) &__start_context;
+
+ /* Put args in a0-a7, then put any remaining args on the stack. */
+ ucp->uc_mcontext.__gregs[LARCH_REG_A0 + 0] = a0;
+ ucp->uc_mcontext.__gregs[LARCH_REG_A0 + 1] = a1;
+ ucp->uc_mcontext.__gregs[LARCH_REG_A0 + 2] = a2;
+ ucp->uc_mcontext.__gregs[LARCH_REG_A0 + 3] = a3;
+ ucp->uc_mcontext.__gregs[LARCH_REG_A0 + 4] = a4;
+
+ if (__glibc_unlikely (argc > 5))
+ {
+ va_list vl;
+ va_start (vl, a4);
+
+ long reg_args = argc < LARCH_REG_NARGS ? argc : LARCH_REG_NARGS;
+ for (i = 5; i < reg_args; i++)
+ ucp->uc_mcontext.__gregs[LARCH_REG_A0 + i] = va_arg (vl, long);
+
+ long int stack_args = argc - reg_args;
+ if (stack_args > 0)
+ {
+ sp = (sp - stack_args * sizeof (long int)) & ALMASK;
+ ucp->uc_mcontext.__gregs[LARCH_REG_SP] = sp;
+ for (i = 0; i < stack_args; i++)
+ ((long int *) sp)[i] = va_arg (vl, long int);
+ }
+
+ va_end (vl);
+ }
+}
+
+weak_alias (__makecontext, makecontext)
new file mode 100644
@@ -0,0 +1,100 @@
+/* Set current context.
+ 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 "sys/regdef.h"
+#include "ucontext-macros.h"
+
+/* int __setcontext (const ucontext_t *ucp)
+
+ Restores the machine context in UCP and thereby resumes execution
+ in that context.
+
+ This implementation is intended to be used for *synchronous* context
+ switches only. Therefore, it does not have to restore anything
+ other than the PRESERVED state. */
+
+ .text
+LEAF (__setcontext)
+
+ addi.d sp, sp, -16
+ st.d a0, sp, 0 /* Save ucp to stack */
+
+/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, NULL, _NSIG8) */
+ li.d a3, _NSIG8
+ li.d a2, 0
+ li.d a1, UCONTEXT_SIGMASK
+ add.d a1, a1, a0
+ li.d a0, SIG_SETMASK
+
+ li.d a7, SYS_ify (rt_sigprocmask)
+ syscall 0
+
+ blt a0, $r0, 99f
+
+ ld.d t0, sp, 0 /* Load ucp to t0 */
+ cfi_def_cfa (12, 0)
+
+/* Note the contents of argument registers will be random
+ unless makecontext() has been called. */
+ RESTORE_INT_REG(ra, 1, t0)
+ RESTORE_INT_REG(sp, 3, t0)
+ RESTORE_INT_REG(a0, 4, t0)
+ RESTORE_INT_REG(a1, 5, t0)
+ RESTORE_INT_REG(a2, 6, t0)
+ RESTORE_INT_REG(a3, 7, t0)
+ RESTORE_INT_REG(a4, 8, t0)
+ RESTORE_INT_REG(a5, 9, t0)
+ RESTORE_INT_REG(a6, 10, t0)
+ RESTORE_INT_REG(a7, 11, t0)
+ RESTORE_INT_REG(x, 21, t0)
+ RESTORE_INT_REG(fp, 22, t0)
+ RESTORE_INT_REG(s0, 23, t0)
+ RESTORE_INT_REG(s1, 24, t0)
+ RESTORE_INT_REG(s2, 25, t0)
+ RESTORE_INT_REG(s3, 26, t0)
+ RESTORE_INT_REG(s4, 27, t0)
+ RESTORE_INT_REG(s5, 28, t0)
+ RESTORE_INT_REG(s6, 29, t0)
+ RESTORE_INT_REG(s7, 30, t0)
+ RESTORE_INT_REG(s8, 31, t0)
+
+ ld.d t1, t0, MCONTEXT_PC
+ jirl $r0,t1,0
+
+99:
+ addi.d sp, sp, 16
+ b __syscall_error
+
+PSEUDO_END (__setcontext)
+weak_alias (__setcontext, setcontext)
+
+LEAF (__start_context)
+
+ /* Terminate call stack by noting ra == 0. Happily, s0 == 0 here. */
+ cfi_register (1, 23)
+
+ /* Call the function passed to makecontext. */
+ jirl $r1,s1,0
+
+ /* Invoke subsequent context if present, else exit(0). */
+ ori a0, s2, 0
+ beqz s2, 1f
+ bl __setcontext
+1:
+ b exit
+
+PSEUDO_END (__start_context)
new file mode 100644
@@ -0,0 +1,32 @@
+/* LoongArch definitions for signal handling calling conventions.
+ 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 _SIGCONTEXTINFO_H
+#define _SIGCONTEXTINFO_H
+
+#include <stdint.h>
+#include <sys/ucontext.h>
+
+static inline uintptr_t
+sigcontext_get_pc (const ucontext_t *ctx)
+{
+ return ctx->uc_mcontext.__pc;
+}
+
+#endif
new file mode 100644
@@ -0,0 +1,95 @@
+/* Save and set current context.
+ 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 "ucontext-macros.h"
+
+/* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */
+
+LEAF (__swapcontext)
+ ori a2, sp, 0 /* Save sp to a2 */
+ addi.d sp, sp, -16
+ st.d a1, sp, 0
+ ori t0, a1, 0
+
+ SAVE_INT_REG (ra, 1, a0)
+ SAVE_INT_REG (a2, 3, a0) /* Store sp */
+ SAVE_INT_REG (zero, 4, a0) /* return 0 by overwriting a0 */
+ SAVE_INT_REG (x, 21, a0)
+ SAVE_INT_REG (fp, 22, a0)
+ SAVE_INT_REG (s0, 23, a0)
+ SAVE_INT_REG (s1, 24, a0)
+ SAVE_INT_REG (s2, 25, a0)
+ SAVE_INT_REG (s3, 26, a0)
+ SAVE_INT_REG (s4, 27, a0)
+ SAVE_INT_REG (s5, 28, a0)
+ SAVE_INT_REG (s6, 29, a0)
+ SAVE_INT_REG (s7, 30, a0)
+ SAVE_INT_REG (s8, 31, a0)
+
+ st.d ra, a0, MCONTEXT_PC
+
+/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, &oucp->uc_sigmask, _NSIG8) */
+ li.d a3, _NSIG8
+ li.d a2, UCONTEXT_SIGMASK
+ add.d a2, a2, a0
+ li.d a1, UCONTEXT_SIGMASK
+ add.d a1, a1, t0
+ li.d a0, SIG_SETMASK
+
+ li.d a7, SYS_ify (rt_sigprocmask)
+ syscall 0
+
+ blt a0, zero, 99f
+
+ ld.d t0, sp, 0 /* Load a1 to t0 */
+
+/* Note the contents of argument registers will be random
+ unless makecontext() has been called. */
+ RESTORE_INT_REG (ra, 1, t0)
+ RESTORE_INT_REG (sp, 3, t0)
+ RESTORE_INT_REG (a0, 4, t0)
+ RESTORE_INT_REG (a1, 5, t0)
+ RESTORE_INT_REG (a2, 6, t0)
+ RESTORE_INT_REG (a3, 7, t0)
+ RESTORE_INT_REG (a4, 8, t0)
+ RESTORE_INT_REG (a5, 9, t0)
+ RESTORE_INT_REG (a6, 10, t0)
+ RESTORE_INT_REG (a7, 11, t0)
+ RESTORE_INT_REG (x, 21, t0)
+ RESTORE_INT_REG (fp, 22, t0)
+ RESTORE_INT_REG (s0, 23, t0)
+ RESTORE_INT_REG (s1, 24, t0)
+ RESTORE_INT_REG (s2, 25, t0)
+ RESTORE_INT_REG (s3, 26, t0)
+ RESTORE_INT_REG (s4, 27, t0)
+ RESTORE_INT_REG (s5, 28, t0)
+ RESTORE_INT_REG (s6, 29, t0)
+ RESTORE_INT_REG (s7, 30, t0)
+ RESTORE_INT_REG (s8, 31, t0)
+
+ ld.d t1, t0, MCONTEXT_PC
+ jirl $r0, t1, 0
+
+
+99:
+ addi.d sp, sp, 16
+ b __syscall_error
+
+PSEUDO_END (__swapcontext)
+
+weak_alias (__swapcontext, swapcontext)
new file mode 100644
@@ -0,0 +1,61 @@
+/* struct ucontext definition.
+ 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/>. */
+
+/* Don't rely on this, the interface is currently messed up and may need to
+ be broken to be fixed. */
+#ifndef _SYS_UCONTEXT_H
+#define _SYS_UCONTEXT_H 1
+
+#include <features.h>
+
+#include <bits/types/sigset_t.h>
+#include <bits/types/stack_t.h>
+
+#ifdef __USE_MISC
+#define LARCH_NGREG 32
+
+#define LARCH_REG_RA 1
+#define LARCH_REG_SP 3
+#define LARCH_REG_S0 23
+#define LARCH_REG_S1 24
+#define LARCH_REG_A0 4
+#define LARCH_REG_S2 25
+#define LARCH_REG_NARGS 8
+
+#endif
+
+typedef struct mcontext_t
+{
+ unsigned long long __pc;
+ unsigned long long __gregs[32];
+ unsigned int __flags;
+ unsigned long long __extcontext[0] __attribute__((__aligned__(16)));
+} mcontext_t;
+
+/* Userlevel context. */
+typedef struct ucontext_t
+{
+ unsigned long int __uc_flags;
+ struct ucontext_t *uc_link;
+ stack_t uc_stack;
+ sigset_t uc_sigmask;
+ mcontext_t uc_mcontext;
+} ucontext_t;
+
+#endif /* sys/ucontext.h */
new file mode 100644
@@ -0,0 +1,42 @@
+/* struct user_regs_struct definition 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/>. */
+
+#ifndef _SYS_USER_H
+#define _SYS_USER_H 1
+
+#include <stdint.h>
+
+struct user_regs_struct
+{
+ /* Saved main processor registers. */
+ uint64_t regs[32];
+
+ /* Saved special registers. */
+ uint64_t orig_a0;
+ uint64_t csr_era;
+ uint64_t csr_badv;
+ uint64_t reserved[10];
+};
+
+struct user_fp_struct {
+ uint64_t fpr[32];
+ uint64_t fcc;
+ uint32_t fcsr;
+};
+
+#endif /* _SYS_USER_H */
new file mode 100644
@@ -0,0 +1,32 @@
+/* Macros for ucontext routines.
+ 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 _LINUX_LOONGARCH_UCONTEXT_MACROS_H
+#define _LINUX_LOONGARCH_UCONTEXT_MACROS_H
+
+#include <sysdep.h>
+#include <sys/asm.h>
+#include "ucontext_i.h"
+
+#define SAVE_INT_REG(name, num, base) \
+ REG_S name, base, ((num) *SZREG + MCONTEXT_GREGS)
+
+#define RESTORE_INT_REG(name, num, base) \
+ REG_L name, base, ((num) *SZREG + MCONTEXT_GREGS)
+
+#endif /* _LINUX_LOONGARCH_UCONTEXT_MACROS_H */
new file mode 100644
@@ -0,0 +1,31 @@
+#include <inttypes.h>
+#include <signal.h>
+#include <stddef.h>
+#include <sys/ucontext.h>
+
+-- Constants used by the rt_sigprocmask call.
+
+SIG_BLOCK
+SIG_SETMASK
+
+_NSIG8 (_NSIG / 8)
+
+-- Offsets of the fields in the ucontext_t structure.
+#define ucontext(member) offsetof (ucontext_t, member)
+#define stack(member) ucontext (uc_stack.member)
+#define mcontext(member) ucontext (uc_mcontext.member)
+
+UCONTEXT_FLAGS ucontext (__uc_flags)
+UCONTEXT_LINK ucontext (uc_link)
+UCONTEXT_STACK ucontext (uc_stack)
+UCONTEXT_MCONTEXT ucontext (uc_mcontext)
+UCONTEXT_SIGMASK ucontext (uc_sigmask)
+
+STACK_SP stack (ss_sp)
+STACK_SIZE stack (ss_size)
+STACK_FLAGS stack (ss_flags)
+
+MCONTEXT_PC mcontext (__pc)
+MCONTEXT_GREGS mcontext (__gregs)
+
+UCONTEXT_SIZE sizeof (ucontext_t)