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/* Target-dependent code for NetBSD/i386, for GDB.
Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002
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
(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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "gdbtypes.h"
#include "gdbcore.h"
#include "regcache.h"
#include "arch-utils.h"
#include "i386-tdep.h"
#include "i387-tdep.h"
#include "nbsd-tdep.h"
/* Map a GDB register number to an offset in the reg structure. */
static int regmap[] =
{
( 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 */
};
#define SIZEOF_STRUCT_REG (16 * 4)
static void
i386nbsd_supply_reg (char *regs, int regno)
{
int i;
for (i = 0; i <= 15; i++)
if (regno == i || regno == -1)
supply_register (i, regs + regmap[i]);
}
static void
fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
CORE_ADDR ignore)
{
char *regs, *fsave;
/* We get everything from one section. */
if (which != 0)
return;
if (core_reg_size < (SIZEOF_STRUCT_REG + 108))
{
warning ("Wrong size register set in core file.");
return;
}
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;
}
}
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 */
};
static int
i386nbsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
/* Check for libc-provided signal trampoline. */
if (nbsd_pc_in_sigtramp (pc, name))
return 1;
/* FIXME: sigtramp_start/sigtramp_end need to go away; we should
not be assuming the location of the kernel-provided trampoline! */
return (pc >= tdep->sigtramp_start && pc < tdep->sigtramp_end);
}
CORE_ADDR i386nbsd_sigtramp_start = 0xbfbfdf20;
CORE_ADDR i386nbsd_sigtramp_end = 0xbfbfdff0;
/* From <machine/signal.h>. */
int i386nbsd_sc_pc_offset = 44;
int i386nbsd_sc_sp_offset = 56;
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 different signal trampoline conventions. */
set_gdbarch_pc_in_sigtramp (gdbarch, i386nbsd_pc_in_sigtramp);
/* NetBSD uses -freg-struct-return by default. */
tdep->struct_return = reg_struct_return;
/* NetBSD uses a different memory layout. */
tdep->sigtramp_start = i386nbsd_sigtramp_start;
tdep->sigtramp_end = i386nbsd_sigtramp_end;
/* NetBSD has a `struct sigcontext' that's different from the
origional 4.3 BSD. */
tdep->sc_pc_offset = i386nbsd_sc_pc_offset;
tdep->sc_sp_offset = i386nbsd_sc_sp_offset;
}
/* 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_gdbarch_in_solib_call_trampoline (gdbarch,
generic_in_solib_call_trampoline);
/* 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, GDB_OSABI_NETBSD_AOUT,
i386nbsd_init_abi);
gdbarch_register_osabi (bfd_arch_i386, GDB_OSABI_NETBSD_ELF,
i386nbsdelf_init_abi);
}
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