-/* Target-dependent code for NetBSD/i386, for GDB.
- Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002, 2003
- Free Software Foundation, Inc.
+/* Target-dependent code for NetBSD/i386.
+
+ Copyright (C) 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002, 2003,
+ 2004, 2007 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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "gdbtypes.h"
+#include "arch-utils.h"
+#include "frame.h"
#include "gdbcore.h"
#include "regcache.h"
-#include "arch-utils.h"
+#include "regset.h"
#include "osabi.h"
+#include "symtab.h"
+
+#include "gdb_assert.h"
+#include "gdb_string.h"
#include "i386-tdep.h"
#include "i387-tdep.h"
#include "nbsd-tdep.h"
-
#include "solib-svr4.h"
-/* Map a GDB register number to an offset in the reg structure. */
-static int regmap[] =
+/* 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), /* %epb */
- ( 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 */
+ 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 */
};
-#define SIZEOF_STRUCT_REG (16 * 4)
-
static void
-i386nbsd_supply_reg (char *regs, int regno)
+i386nbsd_aout_supply_regset (const struct regset *regset,
+ struct regcache *regcache, int regnum,
+ const void *regs, size_t len)
{
- int i;
+ const struct gdbarch_tdep *tdep = gdbarch_tdep (regset->arch);
+
+ gdb_assert (len >= tdep->sizeof_gregset + I387_SIZEOF_FSAVE);
- for (i = 0; i <= 15; i++)
- if (regno == i || regno == -1)
- supply_register (i, regs + regmap[i]);
+ i386_supply_gregset (regset, regcache, regnum, regs, tdep->sizeof_gregset);
+ i387_supply_fsave (regcache, regnum, (char *) regs + tdep->sizeof_gregset);
}
-static void
-fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
- CORE_ADDR ignore)
+static const struct regset *
+i386nbsd_aout_regset_from_core_section (struct gdbarch *gdbarch,
+ const char *sect_name,
+ size_t sect_size)
{
- char *regs, *fsave;
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- /* We get everything from one section. */
- if (which != 0)
- return;
+ /* NetBSD a.out core dumps don't use seperate register sets for the
+ general-purpose and floating-point registers. */
- if (core_reg_size < (SIZEOF_STRUCT_REG + 108))
+ if (strcmp (sect_name, ".reg") == 0
+ && sect_size >= tdep->sizeof_gregset + I387_SIZEOF_FSAVE)
{
- warning ("Wrong size register set in core file.");
- return;
+ if (tdep->gregset == NULL)
+ tdep->gregset =
+ regset_alloc (gdbarch, i386nbsd_aout_supply_regset, NULL);
+ return tdep->gregset;
}
- regs = core_reg_sect;
- fsave = core_reg_sect + SIZEOF_STRUCT_REG;
-
- /* Integer registers. */
- i386nbsd_supply_reg (regs, -1);
-
- /* Floating point registers. */
- i387_supply_fsave (fsave);
-}
-
-static void
-fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size,
- int which, CORE_ADDR ignore)
-{
- switch (which)
- {
- case 0: /* Integer registers. */
- if (core_reg_size != SIZEOF_STRUCT_REG)
- warning ("Wrong size register set in core file.");
- else
- i386nbsd_supply_reg (core_reg_sect, -1);
- break;
-
- case 2: /* Floating point registers. */
- if (core_reg_size != 108)
- warning ("Wrong size FP register set in core file.");
- else
- i387_supply_fsave (core_reg_sect);
- break;
-
- case 3: /* "Extended" floating point registers. This is gdb-speak
- for SSE/SSE2. */
- if (core_reg_size != 512)
- warning ("Wrong size XMM register set in core file.");
- else
- i387_supply_fxsave (core_reg_sect);
- break;
-
- default:
- /* Don't know what kind of register request this is; just ignore it. */
- break;
- }
+ return NULL;
}
-static struct core_fns i386nbsd_core_fns =
-{
- bfd_target_unknown_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_core_registers, /* core_read_registers */
- NULL /* next */
-};
-
-static struct core_fns i386nbsd_elfcore_fns =
-{
- bfd_target_elf_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_elfcore_registers, /* core_read_registers */
- NULL /* next */
-};
-
/* Under NetBSD/i386, signal handler invocations can be identified by the
designated code sequence that is used to return from a signal handler.
In particular, the return address of a signal handler points to the
};
static LONGEST
-i386nbsd_sigtramp_offset (CORE_ADDR pc)
+i386nbsd_sigtramp_offset (struct frame_info *next_frame)
{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
unsigned char ret[sizeof(sigtramp_retcode)], insn;
LONGEST off;
int i;
- if (read_memory_nobpt (pc, &insn, 1) != 0)
+ if (!safe_frame_unwind_memory (next_frame, pc, &insn, 1))
return -1;
switch (insn)
case RETCODE_INSN2:
/* INSN2 and INSN3 are the same. Read at the location of PC+1
to determine if we're actually looking at INSN2 or INSN3. */
- if (read_memory_nobpt (pc + 1, &insn, 1) != 0)
+ if (!safe_frame_unwind_memory (next_frame, pc + 1, &insn, 1))
return -1;
if (insn == RETCODE_INSN3)
pc -= off;
- if (read_memory_nobpt (pc, (char *) ret, sizeof (ret)) != 0)
+ if (!safe_frame_unwind_memory (next_frame, pc, ret, sizeof (ret)))
return -1;
if (memcmp (ret, sigtramp_retcode, sizeof (ret)) == 0)
return -1;
}
+/* Return whether the frame preceding NEXT_FRAME corresponds to a
+ NetBSD sigtramp routine. */
+
static int
-i386nbsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
+i386nbsd_sigtramp_p (struct frame_info *next_frame)
{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
+ char *name;
+
+ find_pc_partial_function (pc, &name, NULL, NULL);
return (nbsd_pc_in_sigtramp (pc, name)
- || i386nbsd_sigtramp_offset (pc) >= 0);
+ || i386nbsd_sigtramp_offset (next_frame) >= 0);
}
/* From <machine/signal.h>. */
-int i386nbsd_sc_reg_offset[I386_NUM_GREGS] =
+int i386nbsd_sc_reg_offset[] =
{
10 * 4, /* %eax */
9 * 4, /* %ecx */
/* 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 has different signal trampoline conventions. */
- set_gdbarch_pc_in_sigtramp (gdbarch, i386nbsd_pc_in_sigtramp);
- /* FIXME: kettenis/20020906: We should probably provide
- NetBSD-specific versions of these functions if we want to
- recognize signal trampolines that live on the stack. */
- set_gdbarch_sigtramp_start (gdbarch, NULL);
- set_gdbarch_sigtramp_end (gdbarch, NULL);
+ tdep->sigtramp_start = 0;
+ tdep->sigtramp_end = 0;
+ tdep->sigtramp_p = i386nbsd_sigtramp_p;
/* NetBSD uses -freg-struct-return by default. */
tdep->struct_return = reg_struct_return;
/* NetBSD has a `struct sigcontext' that's different from the
- origional 4.3 BSD. */
+ original 4.3 BSD. */
tdep->sc_reg_offset = i386nbsd_sc_reg_offset;
- tdep->sc_num_regs = I386_NUM_GREGS;
+ tdep->sc_num_regs = ARRAY_SIZE (i386nbsd_sc_reg_offset);
+}
+
+/* NetBSD a.out. */
+
+static void
+i386nbsdaout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ i386nbsd_init_abi (info, gdbarch);
+
+ /* NetBSD a.out has a single register set. */
+ set_gdbarch_regset_from_core_section
+ (gdbarch, i386nbsd_aout_regset_from_core_section);
}
/* NetBSD ELF. */
+
static void
i386nbsdelf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
i386_elf_init_abi (info, gdbarch);
/* NetBSD ELF uses SVR4-style shared libraries. */
- set_gdbarch_in_solib_call_trampoline (gdbarch,
- generic_in_solib_call_trampoline);
- set_solib_svr4_fetch_link_map_offsets (gdbarch,
- nbsd_ilp32_solib_svr4_fetch_link_map_offsets);
+ 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;
-
- /* We support the SSE registers on NetBSD ELF. */
- tdep->num_xmm_regs = I386_NUM_XREGS - 1;
- set_gdbarch_num_regs (gdbarch, I386_NUM_GREGS + I386_NUM_FREGS
- + I386_NUM_XREGS);
}
void
_initialize_i386nbsd_tdep (void)
{
- add_core_fns (&i386nbsd_core_fns);
- add_core_fns (&i386nbsd_elfcore_fns);
-
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_NETBSD_AOUT,
- i386nbsd_init_abi);
+ i386nbsdaout_init_abi);
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_NETBSD_ELF,
i386nbsdelf_init_abi);
}
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