+++ /dev/null
-/* Target-dependent code for NetBSD/i386.
-
- Copyright (C) 1988-2016 Free Software Foundation, Inc.
-
- This file is part of GDB.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- This program 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 a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
-
-#include "defs.h"
-#include "arch-utils.h"
-#include "frame.h"
-#include "gdbcore.h"
-#include "regcache.h"
-#include "regset.h"
-#include "osabi.h"
-#include "symtab.h"
-#include "trad-frame.h"
-#include "tramp-frame.h"
-
-#include "i386-tdep.h"
-#include "i387-tdep.h"
-#include "nbsd-tdep.h"
-#include "solib-svr4.h"
-
-/* From <machine/reg.h>. */
-static int i386nbsd_r_reg_offset[] =
-{
- 0 * 4, /* %eax */
- 1 * 4, /* %ecx */
- 2 * 4, /* %edx */
- 3 * 4, /* %ebx */
- 4 * 4, /* %esp */
- 5 * 4, /* %ebp */
- 6 * 4, /* %esi */
- 7 * 4, /* %edi */
- 8 * 4, /* %eip */
- 9 * 4, /* %eflags */
- 10 * 4, /* %cs */
- 11 * 4, /* %ss */
- 12 * 4, /* %ds */
- 13 * 4, /* %es */
- 14 * 4, /* %fs */
- 15 * 4 /* %gs */
-};
-
-/* From <machine/signal.h>. */
-int i386nbsd_sc_reg_offset[] =
-{
- 10 * 4, /* %eax */
- 9 * 4, /* %ecx */
- 8 * 4, /* %edx */
- 7 * 4, /* %ebx */
- 14 * 4, /* %esp */
- 6 * 4, /* %ebp */
- 5 * 4, /* %esi */
- 4 * 4, /* %edi */
- 11 * 4, /* %eip */
- 13 * 4, /* %eflags */
- 12 * 4, /* %cs */
- 15 * 4, /* %ss */
- 3 * 4, /* %ds */
- 2 * 4, /* %es */
- 1 * 4, /* %fs */
- 0 * 4 /* %gs */
-};
-
-/* From <machine/mcontext.h>. */
-int i386nbsd_mc_reg_offset[] =
-{
- 11 * 4, /* %eax */
- 10 * 4, /* %ecx */
- 9 * 4, /* %edx */
- 8 * 4, /* %ebx */
- 7 * 4, /* %esp */
- 6 * 4, /* %ebp */
- 5 * 4, /* %esi */
- 4 * 4, /* %edi */
- 14 * 4, /* %eip */
- 16 * 4, /* %eflags */
- 15 * 4, /* %cs */
- 18 * 4, /* %ss */
- 3 * 4, /* %ds */
- 2 * 4, /* %es */
- 1 * 4, /* %fs */
- 0 * 4 /* %gs */
-};
-
-static void i386nbsd_sigtramp_cache_init (const struct tramp_frame *,
- struct frame_info *,
- struct trad_frame_cache *,
- CORE_ADDR);
-
-static const struct tramp_frame i386nbsd_sigtramp_sc16 =
-{
- SIGTRAMP_FRAME,
- 1,
- {
- { 0x8d, -1 }, { 0x44, -1 }, { 0x24, -1 }, { 0x10, -1 },
- /* leal 0x10(%esp), %eax */
- { 0x50, -1 }, /* pushl %eax */
- { 0x50, -1 }, /* pushl %eax */
- { 0xb8, -1 }, { 0x27, -1 }, {0x01, -1 }, {0x00, -1 }, {0x00, -1 },
- /* movl $0x127, %eax # __sigreturn14 */
- { 0xcd, -1 }, { 0x80, -1},
- /* int $0x80 */
- { 0xb8, -1 }, { 0x01, -1 }, {0x00, -1 }, {0x00, -1 }, {0x00, -1 },
- /* movl $0x1, %eax # exit */
- { 0xcd, -1 }, { 0x80, -1},
- /* int $0x80 */
- { TRAMP_SENTINEL_INSN, -1 }
- },
- i386nbsd_sigtramp_cache_init
-};
-
-static const struct tramp_frame i386nbsd_sigtramp_sc2 =
-{
- SIGTRAMP_FRAME,
- 1,
- {
- { 0x8d, -1 }, { 0x44, -1 }, { 0x24, -1 }, { 0x0c, -1 },
- /* leal 0x0c(%esp), %eax */
- { 0x89, -1 }, { 0x44, -1 }, { 0x24, -1 }, { 0x04, -1 },
- /* movl %eax, 0x4(%esp) */
- { 0xb8, -1 }, { 0x27, -1 }, {0x01, -1 }, {0x00, -1 }, {0x00, -1 },
- /* movl $0x127, %eax # __sigreturn14 */
- { 0xcd, -1 }, { 0x80, -1},
- /* int $0x80 */
- { 0x89, -1 }, { 0x44, -1 }, { 0x24, -1 }, { 0x04, -1 },
- /* movl %eax, 0x4(%esp) */
- { 0xb8, -1 }, { 0x01, -1 }, {0x00, -1 }, {0x00, -1 }, {0x00, -1 },
- /* movl $0x1, %eax */
- { 0xcd, -1 }, { 0x80, -1},
- /* int $0x80 */
- { TRAMP_SENTINEL_INSN, -1 }
- },
- i386nbsd_sigtramp_cache_init
-};
-
-static const struct tramp_frame i386nbsd_sigtramp_si2 =
-{
- SIGTRAMP_FRAME,
- 1,
- {
- { 0x8b, -1 }, { 0x44, -1 }, { 0x24, -1 }, { 0x08, -1 },
- /* movl 8(%esp),%eax */
- { 0x89, -1 }, { 0x44, -1 }, { 0x24, -1 }, { 0x04, -1 },
- /* movl %eax, 0x4(%esp) */
- { 0xb8, -1 }, { 0x34, -1 }, { 0x01, -1 }, { 0x00, -1 }, { 0x00, -1 },
- /* movl $0x134, %eax # setcontext */
- { 0xcd, -1 }, { 0x80, -1 },
- /* int $0x80 */
- { 0x89, -1 }, { 0x44, -1 }, { 0x24, -1 }, { 0x04, -1 },
- /* movl %eax, 0x4(%esp) */
- { 0xb8, -1 }, { 0x01, -1 }, { 0x00, -1 }, { 0x00, -1 }, { 0x00, -1 },
- /* movl $0x1, %eax */
- { 0xcd, -1 }, { 0x80, -1 },
- /* int $0x80 */
- { TRAMP_SENTINEL_INSN, -1 }
- },
- i386nbsd_sigtramp_cache_init
-};
-
-static const struct tramp_frame i386nbsd_sigtramp_si31 =
-{
- SIGTRAMP_FRAME,
- 1,
- {
- { 0x8d, -1 }, { 0x84, -1 }, { 0x24, -1 },
- { 0x8c, -1 }, { 0x00, -1 }, { 0x00, -1 }, { 0x00, -1 },
- /* leal 0x8c(%esp), %eax */
- { 0x89, -1 }, { 0x44, -1 }, { 0x24, -1 }, { 0x04, -1 },
- /* movl %eax, 0x4(%esp) */
- { 0xb8, -1 }, { 0x34, -1 }, { 0x01, -1 }, { 0x00, -1 }, { 0x00, -1 },
- /* movl $0x134, %eax # setcontext */
- { 0xcd, -1 }, { 0x80, -1},
- /* int $0x80 */
- { 0x89, -1 }, { 0x44, -1 }, { 0x24, -1 }, { 0x04, -1 },
- /* movl %eax, 0x4(%esp) */
- { 0xb8, -1 }, { 0x01, -1 }, {0x00, -1 }, {0x00, -1 }, {0x00, -1 },
- /* movl $0x1, %eax */
- { 0xcd, -1 }, { 0x80, -1},
- /* int $0x80 */
- { TRAMP_SENTINEL_INSN, -1 }
- },
- i386nbsd_sigtramp_cache_init
-};
-
-static const struct tramp_frame i386nbsd_sigtramp_si4 =
-{
- SIGTRAMP_FRAME,
- 1,
- {
- { 0x8d, -1 }, { 0x84, -1 }, { 0x24, -1 },
- { 0x8c, -1 }, { 0x00, -1 }, { 0x00, -1 }, { 0x00, -1 },
- /* leal 0x8c(%esp), %eax */
- { 0x89, -1 }, { 0x44, -1 }, { 0x24, -1 }, { 0x04, -1 },
- /* movl %eax, 0x4(%esp) */
- { 0xb8, -1 }, { 0x34, -1 }, { 0x01, -1 }, { 0x00, -1 }, { 0x00, -1 },
- /* movl $0x134, %eax # setcontext */
- { 0xcd, -1 }, { 0x80, -1},
- /* int $0x80 */
- { 0xc7, -1 }, { 0x44, -1 }, { 0x24, -1 }, { 0x04, -1 },
- { 0xff, -1 }, { 0xff, -1 }, { 0xff, -1 }, { 0xff, -1 },
- /* movl $0xffffffff,0x4(%esp) */
- { 0xb8, -1 }, { 0x01, -1 }, {0x00, -1 }, {0x00, -1 }, {0x00, -1 },
- /* movl $0x1, %eax */
- { 0xcd, -1 }, { 0x80, -1},
- /* int $0x80 */
- { TRAMP_SENTINEL_INSN, -1 }
- },
- i386nbsd_sigtramp_cache_init
-};
-
-static void
-i386nbsd_sigtramp_cache_init (const struct tramp_frame *self,
- struct frame_info *this_frame,
- struct trad_frame_cache *this_cache,
- CORE_ADDR func)
-{
- struct gdbarch *gdbarch = get_frame_arch (this_frame);
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- CORE_ADDR sp = get_frame_register_unsigned (this_frame, I386_ESP_REGNUM);
- CORE_ADDR base;
- int *reg_offset;
- int num_regs;
- int i;
-
- if (self == &i386nbsd_sigtramp_sc16 || self == &i386nbsd_sigtramp_sc2)
- {
- reg_offset = i386nbsd_sc_reg_offset;
- num_regs = ARRAY_SIZE (i386nbsd_sc_reg_offset);
-
- /* Read in the sigcontext address. */
- base = read_memory_unsigned_integer (sp + 8, 4, byte_order);
- }
- else
- {
- reg_offset = i386nbsd_mc_reg_offset;
- num_regs = ARRAY_SIZE (i386nbsd_mc_reg_offset);
-
- /* Read in the ucontext address. */
- base = read_memory_unsigned_integer (sp + 8, 4, byte_order);
- /* offsetof(ucontext_t, uc_mcontext) == 36 */
- base += 36;
- }
-
- for (i = 0; i < num_regs; i++)
- if (reg_offset[i] != -1)
- trad_frame_set_reg_addr (this_cache, i, base + reg_offset[i]);
-
- /* Construct the frame ID using the function start. */
- trad_frame_set_id (this_cache, frame_id_build (sp, func));
-}
-\f
-
-static void
-i386nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- /* Obviously NetBSD is BSD-based. */
- i386bsd_init_abi (info, gdbarch);
-
- /* NetBSD has a different `struct reg'. */
- tdep->gregset_reg_offset = i386nbsd_r_reg_offset;
- tdep->gregset_num_regs = ARRAY_SIZE (i386nbsd_r_reg_offset);
- tdep->sizeof_gregset = 16 * 4;
-
- /* NetBSD uses -freg-struct-return by default. */
- tdep->struct_return = reg_struct_return;
-
- /* NetBSD uses tramp_frame sniffers for signal trampolines. */
- tdep->sigcontext_addr= 0;
- tdep->sigtramp_start = 0;
- tdep->sigtramp_end = 0;
- tdep->sigtramp_p = 0;
- tdep->sc_reg_offset = 0;
- tdep->sc_num_regs = 0;
-
- tramp_frame_prepend_unwinder (gdbarch, &i386nbsd_sigtramp_sc16);
- tramp_frame_prepend_unwinder (gdbarch, &i386nbsd_sigtramp_sc2);
- tramp_frame_prepend_unwinder (gdbarch, &i386nbsd_sigtramp_si2);
- tramp_frame_prepend_unwinder (gdbarch, &i386nbsd_sigtramp_si31);
- tramp_frame_prepend_unwinder (gdbarch, &i386nbsd_sigtramp_si4);
-}
-
-/* NetBSD ELF. */
-
-static void
-i386nbsdelf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- /* It's still NetBSD. */
- i386nbsd_init_abi (info, gdbarch);
-
- /* But ELF-based. */
- i386_elf_init_abi (info, gdbarch);
-
- /* NetBSD ELF uses SVR4-style shared libraries. */
- set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_ilp32_fetch_link_map_offsets);
-
- /* NetBSD ELF uses -fpcc-struct-return by default. */
- tdep->struct_return = pcc_struct_return;
-}
-
-/* Provide a prototype to silence -Wmissing-prototypes. */
-extern initialize_file_ftype _initialize_i386nbsd_tdep;
-
-void
-_initialize_i386nbsd_tdep (void)
-{
- gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_NETBSD_ELF,
- i386nbsdelf_init_abi);
-}
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