@@ -1,4 +1,11 @@
-2023-04-01 Youling Tang <tangyouling@loongson.cn>
+2023-04-07 Youling Tang <tangyouling@loongson.cn>
+
+ * Makefile.am (loongarch_SRCS): Add loongarch_cfi.c and loongarch_regs.c.
+ * loongarch_cfi.c: New file.
+ * loongarch_regs.c: Likewise.
+ * loongarch_init.c (loongarch_init): Hook register_info and abi_cfi.
+
+2023-04-01 Youling Tang <tangyouling@loongson.cn>
* loongarch_init.c (loongarch_init): Hook check_special_symbol.
* loongarch_symbol.c (loongarch_check_special_symbol): New function.
@@ -96,7 +96,8 @@ riscv_SRCS = riscv_init.c riscv_symbol.c riscv_cfi.c riscv_regs.c \
csky_SRCS = csky_attrs.c csky_init.c csky_symbol.c csky_cfi.c \
csky_regs.c csky_initreg.c csky_corenote.c
-loongarch_SRCS = loongarch_init.c loongarch_symbol.c
+loongarch_SRCS = loongarch_init.c loongarch_symbol.c loongarch_cfi.c \
+ loongarch_regs.c
arc_SRCS = arc_init.c arc_symbol.c
new file mode 100644
@@ -0,0 +1,83 @@
+/* LoongArch ABI-specified defaults for DWARF CFI.
+ Copyright (C) 2023 OpenAnolis community LoongArch SIG.
+ Copyright (C) 2023 Loongson Technology Corporation Limted.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils 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
+ General Public License for more details.
+
+ You should have received copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <dwarf.h>
+
+#define BACKEND loongarch_
+#include "libebl_CPU.h"
+
+/* LoongArch ELF ABI specification:
+https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html#_register_convention
+*/
+int
+loongarch_abi_cfi (Ebl *ebl __attribute__ ((unused)), Dwarf_CIE *abi_info)
+{
+ static const uint8_t abi_cfi[] =
+ {
+ /* The initial Canonical Frame Address is the value of the
+ Stack Pointer ($r3) as setup in the previous frame. */
+ DW_CFA_def_cfa, ULEB128_7 (3), ULEB128_7 (0),
+
+ /* The Stack Pointer ($r3) is restored from CFA address by default. */
+ DW_CFA_val_offset, ULEB128_7 (3), ULEB128_7 (0),
+
+#define SV(n) DW_CFA_same_value, ULEB128_7 (n)
+ /* The return address register contains the return address setup by
+ caller. */
+ SV (1),
+
+ /* Callee-saved registers $s0-$s7. */
+ SV (23), SV (24), SV (25), SV (26), SV (27), SV (28),
+ SV (29), SV (30), SV (31),
+
+ /* The Frame Pointer ($fp, $r22) */
+ SV(22),
+
+ /* Callee-saved registers $fs0-$fs7. */
+ SV (56), SV (57), SV (58), SV (59), SV (60), SV (61),
+ SV (62), SV (63),
+#undef SV
+
+ /* XXX Note: registers intentionally unused by the program,
+ for example as a consequence of the procedure call standard
+ should be initialized as if by DW_CFA_same_value. */
+ };
+
+ abi_info->initial_instructions = abi_cfi;
+ abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi];
+ abi_info->data_alignment_factor = -4;
+
+ abi_info->return_address_register = 1; /* ra. */
+
+ return 0;
+}
@@ -46,6 +46,10 @@ loongarch_init (Elf *elf __attribute__ ((unused)),
loongarch_init_reloc (eh);
HOOK (eh, reloc_simple_type);
HOOK (eh, machine_flag_check);
+ HOOK (eh, register_info);
+ HOOK (eh, abi_cfi);
+ /* gcc/config/ #define DWARF_FRAME_REGISTERS. */
+ eh->frame_nregs = 74;
HOOK (eh, check_special_symbol);
return eh;
new file mode 100644
@@ -0,0 +1,141 @@
+/* Register names and numbers for LoongArch DWARF.
+ Copyright (C) 2023 OpenAnolis community LoongArch SIG.
+ Copyright (C) 2023 Loongson Technology Corporation Limted.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils 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
+ General Public License for more details.
+
+ You should have received copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <string.h>
+#include <dwarf.h>
+
+#define BACKEND loongarch_
+#include "libebl_CPU.h"
+
+ssize_t
+loongarch_register_info (Ebl *ebl, int regno, char *name, size_t namelen,
+ const char **prefix, const char **setname,
+ int *bits, int *type)
+{
+ if (name == NULL)
+ return 64;
+
+ *prefix = "";
+
+ if (regno < 32)
+ {
+ *setname = "integer";
+ *type = DW_ATE_signed;
+ *bits = ebl->class == ELFCLASS64 ? 64 : 32;
+ }
+ else
+ {
+ *setname = "FPU";
+ *type = DW_ATE_float;
+ *bits = 64;
+ }
+
+ switch (regno)
+ {
+ case 0:
+ return stpcpy (name, "zero") + 1 - name;
+
+ case 1:
+ *type = DW_ATE_address;
+ return stpcpy (name, "ra") + 1 - name;
+
+ case 2:
+ *type = DW_ATE_address;
+ return stpcpy (name, "tp") + 1 - name;
+
+ case 3:
+ *type = DW_ATE_address;
+ return stpcpy (name, "sp") + 1 - name;
+
+ case 4 ... 11:
+ name[0] = 'a';
+ name[1] = regno - 4 + '0';
+ namelen = 2;
+ break;
+
+ case 12 ... 20:
+ name[0] = 't';
+ name[1] = regno - 12 + '0';
+ namelen = 2;
+ break;
+
+ case 21:
+ return stpcpy (name, "u0") + 1 - name;
+
+ case 22:
+ *type = DW_ATE_address;
+ return stpcpy (name, "fp") + 1 - name;
+
+ case 23 ... 31:
+ name[0] = 's';
+ name[1] = regno - 23 + '0';
+ namelen = 2;
+ break;
+
+ case 32 ... 39:
+ name[0] = 'f';
+ name[1] = 'a';
+ name[2] = regno - 32 + '0';
+ namelen = 3;
+ break;
+
+ case 40 ... 49:
+ name[0] = 'f';
+ name[1] = 't';
+ name[2] = regno - 40 + '0';
+ namelen = 3;
+ break;
+
+ case 50 ... 55:
+ name[0] = 'f';
+ name[1] = 't';
+ name[2] = '1';
+ name[3] = regno - 50 + '0';
+ namelen = 4;
+ break;
+
+ case 56 ... 63:
+ name[0] = 'f';
+ name[1] = 's';
+ name[2] = regno - 56 + '0';
+ namelen = 3;
+ break;
+
+ default:
+ *setname = NULL;
+ return 0;
+ }
+
+ name[namelen++] = '\0';
+ return namelen;
+}