7974396223
gdb/ChangeLog: * nbsd-tdep.c: Include "gdbarch.h". Define enum with NetBSD signal numbers. (nbsd_gdb_signal_from_target, nbsd_gdb_signal_to_target): New. * alpha-nbsd-tdep.c (alphanbsd_init_abi): Call nbsd_init_abi(). * amd64-nbsd-tdep.c (amd64nbsd_init_abi): Likewise. * arm-nbsd-tdep.c (arm_netbsd_elf_init_abi): Likewise. * hppa-nbsd-tdep.c (hppanbsd_init_abi): Likewise. * i386-nbsd-tdep.c (i386nbsd_init_abi): Likewise. * mips-nbsd-tdep.c (nbsd_init_abi): Likewise. * ppc-nbsd-tdep.c (ppcnbsd_init_abi): Likewise. * sh-nbsd-tdep.c (shnbsd_init_abi): Likewise. * sparc-nbsd-tdep.c (sparc32nbsd_init_abi): Likewise. * sparc64-nbsd-tdep.c (sparc64nbsd_init_abi): Likewise. * vax-nbsd-tdep.c (vaxnbsd_elf_init_abi): Likewise.
433 lines
11 KiB
C
433 lines
11 KiB
C
/* Target-dependent code for NetBSD/i386.
|
||
|
||
Copyright (C) 1988-2020 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,
|
||
{
|
||
/* leal 0x10(%esp), %eax */
|
||
{ 0x8d, ULONGEST_MAX },
|
||
{ 0x44, ULONGEST_MAX },
|
||
{ 0x24, ULONGEST_MAX },
|
||
{ 0x10, ULONGEST_MAX },
|
||
|
||
/* pushl %eax */
|
||
{ 0x50, ULONGEST_MAX },
|
||
|
||
/* pushl %eax */
|
||
{ 0x50, ULONGEST_MAX },
|
||
|
||
/* movl $0x127, %eax # __sigreturn14 */
|
||
{ 0xb8, ULONGEST_MAX },
|
||
{ 0x27, ULONGEST_MAX },
|
||
{0x01, ULONGEST_MAX },
|
||
{0x00, ULONGEST_MAX },
|
||
{0x00, ULONGEST_MAX },
|
||
|
||
/* int $0x80 */
|
||
{ 0xcd, ULONGEST_MAX },
|
||
{ 0x80, ULONGEST_MAX},
|
||
|
||
/* movl $0x1, %eax # exit */
|
||
{ 0xb8, ULONGEST_MAX },
|
||
{ 0x01, ULONGEST_MAX },
|
||
{0x00, ULONGEST_MAX },
|
||
{0x00, ULONGEST_MAX },
|
||
{0x00, ULONGEST_MAX },
|
||
|
||
/* int $0x80 */
|
||
{ 0xcd, ULONGEST_MAX },
|
||
{ 0x80, ULONGEST_MAX},
|
||
|
||
{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
|
||
},
|
||
i386nbsd_sigtramp_cache_init
|
||
};
|
||
|
||
static const struct tramp_frame i386nbsd_sigtramp_sc2 =
|
||
{
|
||
SIGTRAMP_FRAME,
|
||
1,
|
||
{
|
||
/* leal 0x0c(%esp), %eax */
|
||
{ 0x8d, ULONGEST_MAX },
|
||
{ 0x44, ULONGEST_MAX },
|
||
{ 0x24, ULONGEST_MAX },
|
||
{ 0x0c, ULONGEST_MAX },
|
||
/* movl %eax, 0x4(%esp) */
|
||
{ 0x89, ULONGEST_MAX },
|
||
{ 0x44, ULONGEST_MAX },
|
||
{ 0x24, ULONGEST_MAX },
|
||
{ 0x04, ULONGEST_MAX },
|
||
/* movl $0x127, %eax # __sigreturn14 */
|
||
{ 0xb8, ULONGEST_MAX },
|
||
{ 0x27, ULONGEST_MAX },
|
||
{0x01, ULONGEST_MAX },
|
||
{0x00, ULONGEST_MAX },
|
||
{0x00, ULONGEST_MAX },
|
||
/* int $0x80 */
|
||
{ 0xcd, ULONGEST_MAX },
|
||
{ 0x80, ULONGEST_MAX},
|
||
/* movl %eax, 0x4(%esp) */
|
||
{ 0x89, ULONGEST_MAX },
|
||
{ 0x44, ULONGEST_MAX },
|
||
{ 0x24, ULONGEST_MAX },
|
||
{ 0x04, ULONGEST_MAX },
|
||
/* movl $0x1, %eax */
|
||
{ 0xb8, ULONGEST_MAX },
|
||
{ 0x01, ULONGEST_MAX },
|
||
{0x00, ULONGEST_MAX },
|
||
{0x00, ULONGEST_MAX },
|
||
{0x00, ULONGEST_MAX },
|
||
/* int $0x80 */
|
||
{ 0xcd, ULONGEST_MAX },
|
||
{ 0x80, ULONGEST_MAX},
|
||
{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
|
||
},
|
||
i386nbsd_sigtramp_cache_init
|
||
};
|
||
|
||
static const struct tramp_frame i386nbsd_sigtramp_si2 =
|
||
{
|
||
SIGTRAMP_FRAME,
|
||
1,
|
||
{
|
||
/* movl 8(%esp),%eax */
|
||
{ 0x8b, ULONGEST_MAX },
|
||
{ 0x44, ULONGEST_MAX },
|
||
{ 0x24, ULONGEST_MAX },
|
||
{ 0x08, ULONGEST_MAX },
|
||
/* movl %eax, 0x4(%esp) */
|
||
{ 0x89, ULONGEST_MAX },
|
||
{ 0x44, ULONGEST_MAX },
|
||
{ 0x24, ULONGEST_MAX },
|
||
{ 0x04, ULONGEST_MAX },
|
||
/* movl $0x134, %eax # setcontext */
|
||
{ 0xb8, ULONGEST_MAX },
|
||
{ 0x34, ULONGEST_MAX },
|
||
{ 0x01, ULONGEST_MAX },
|
||
{ 0x00, ULONGEST_MAX },
|
||
{ 0x00, ULONGEST_MAX },
|
||
/* int $0x80 */
|
||
{ 0xcd, ULONGEST_MAX },
|
||
{ 0x80, ULONGEST_MAX },
|
||
/* movl %eax, 0x4(%esp) */
|
||
{ 0x89, ULONGEST_MAX },
|
||
{ 0x44, ULONGEST_MAX },
|
||
{ 0x24, ULONGEST_MAX },
|
||
{ 0x04, ULONGEST_MAX },
|
||
/* movl $0x1, %eax */
|
||
{ 0xb8, ULONGEST_MAX },
|
||
{ 0x01, ULONGEST_MAX },
|
||
{ 0x00, ULONGEST_MAX },
|
||
{ 0x00, ULONGEST_MAX },
|
||
{ 0x00, ULONGEST_MAX },
|
||
/* int $0x80 */
|
||
{ 0xcd, ULONGEST_MAX },
|
||
{ 0x80, ULONGEST_MAX },
|
||
{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
|
||
},
|
||
i386nbsd_sigtramp_cache_init
|
||
};
|
||
|
||
static const struct tramp_frame i386nbsd_sigtramp_si31 =
|
||
{
|
||
SIGTRAMP_FRAME,
|
||
1,
|
||
{
|
||
/* leal 0x8c(%esp), %eax */
|
||
{ 0x8d, ULONGEST_MAX },
|
||
{ 0x84, ULONGEST_MAX },
|
||
{ 0x24, ULONGEST_MAX },
|
||
{ 0x8c, ULONGEST_MAX },
|
||
{ 0x00, ULONGEST_MAX },
|
||
{ 0x00, ULONGEST_MAX },
|
||
{ 0x00, ULONGEST_MAX },
|
||
/* movl %eax, 0x4(%esp) */
|
||
{ 0x89, ULONGEST_MAX },
|
||
{ 0x44, ULONGEST_MAX },
|
||
{ 0x24, ULONGEST_MAX },
|
||
{ 0x04, ULONGEST_MAX },
|
||
/* movl $0x134, %eax # setcontext */
|
||
{ 0xb8, ULONGEST_MAX },
|
||
{ 0x34, ULONGEST_MAX },
|
||
{ 0x01, ULONGEST_MAX },
|
||
{ 0x00, ULONGEST_MAX },
|
||
{ 0x00, ULONGEST_MAX },
|
||
/* int $0x80 */
|
||
{ 0xcd, ULONGEST_MAX },
|
||
{ 0x80, ULONGEST_MAX},
|
||
/* movl %eax, 0x4(%esp) */
|
||
{ 0x89, ULONGEST_MAX },
|
||
{ 0x44, ULONGEST_MAX },
|
||
{ 0x24, ULONGEST_MAX },
|
||
{ 0x04, ULONGEST_MAX },
|
||
/* movl $0x1, %eax */
|
||
{ 0xb8, ULONGEST_MAX },
|
||
{ 0x01, ULONGEST_MAX },
|
||
{0x00, ULONGEST_MAX },
|
||
{0x00, ULONGEST_MAX },
|
||
{0x00, ULONGEST_MAX },
|
||
/* int $0x80 */
|
||
{ 0xcd, ULONGEST_MAX },
|
||
{ 0x80, ULONGEST_MAX},
|
||
{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
|
||
},
|
||
i386nbsd_sigtramp_cache_init
|
||
};
|
||
|
||
static const struct tramp_frame i386nbsd_sigtramp_si4 =
|
||
{
|
||
SIGTRAMP_FRAME,
|
||
1,
|
||
{
|
||
/* leal 0x8c(%esp), %eax */
|
||
{ 0x8d, ULONGEST_MAX },
|
||
{ 0x84, ULONGEST_MAX },
|
||
{ 0x24, ULONGEST_MAX },
|
||
{ 0x8c, ULONGEST_MAX },
|
||
{ 0x00, ULONGEST_MAX },
|
||
{ 0x00, ULONGEST_MAX },
|
||
{ 0x00, ULONGEST_MAX },
|
||
/* movl %eax, 0x4(%esp) */
|
||
{ 0x89, ULONGEST_MAX },
|
||
{ 0x44, ULONGEST_MAX },
|
||
{ 0x24, ULONGEST_MAX },
|
||
{ 0x04, ULONGEST_MAX },
|
||
/* movl $0x134, %eax # setcontext */
|
||
{ 0xb8, ULONGEST_MAX },
|
||
{ 0x34, ULONGEST_MAX },
|
||
{ 0x01, ULONGEST_MAX },
|
||
{ 0x00, ULONGEST_MAX },
|
||
{ 0x00, ULONGEST_MAX },
|
||
/* int $0x80 */
|
||
{ 0xcd, ULONGEST_MAX },
|
||
{ 0x80, ULONGEST_MAX},
|
||
/* movl $0xffffffff,0x4(%esp) */
|
||
{ 0xc7, ULONGEST_MAX },
|
||
{ 0x44, ULONGEST_MAX },
|
||
{ 0x24, ULONGEST_MAX },
|
||
{ 0x04, ULONGEST_MAX },
|
||
{ 0xff, ULONGEST_MAX },
|
||
{ 0xff, ULONGEST_MAX },
|
||
{ 0xff, ULONGEST_MAX },
|
||
{ 0xff, ULONGEST_MAX },
|
||
/* movl $0x1, %eax */
|
||
{ 0xb8, ULONGEST_MAX },
|
||
{ 0x01, ULONGEST_MAX },
|
||
{0x00, ULONGEST_MAX },
|
||
{0x00, ULONGEST_MAX },
|
||
{0x00, ULONGEST_MAX },
|
||
/* int $0x80 */
|
||
{ 0xcd, ULONGEST_MAX },
|
||
{ 0x80, ULONGEST_MAX},
|
||
{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
|
||
},
|
||
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));
|
||
}
|
||
|
||
|
||
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);
|
||
|
||
nbsd_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;
|
||
}
|
||
|
||
void _initialize_i386nbsd_tdep ();
|
||
void
|
||
_initialize_i386nbsd_tdep ()
|
||
{
|
||
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_NETBSD,
|
||
i386nbsdelf_init_abi);
|
||
}
|