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* i386obsd-tdep.c: Include "regset.h", "gdb_assert.h" and

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"gdb_string.h".
(i386obsd_r_reg_offset): New variable.
(i386obsd_aout_supply_regset)
(i386obsd_aout_regset_from_core_section): New functions.
(i386obsd_supply_reg, fetch_core_registers): Remove functions.
(i286obsd_core_fns): Remove variable.
(i386obsd_init_abi): Initialize TDEP->gregset_reg_offset,
TDEP->gregset_num_regs and TDEP->sizeof_gregset.  Set
regset_from_core_section.  Use ARRAY_SIZE to initialize
TDEP->sc_num_regs.
(_initialize_i386obsd_tdep): Don't call add_core_fns.
This commit is contained in:
Mark Kettenis 2003-12-26 18:07:00 +00:00
parent f6943e4a1d
commit 6745701255
2 changed files with 77 additions and 38 deletions
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13
gdb/ChangeLog
View File

@ -1,5 +1,18 @@
2003-12-26 Mark Kettenis <kettenis@gnu.org>
* i386obsd-tdep.c: Include "regset.h", "gdb_assert.h" and
"gdb_string.h".
(i386obsd_r_reg_offset): New variable.
(i386obsd_aout_supply_regset)
(i386obsd_aout_regset_from_core_section): New functions.
(i386obsd_supply_reg, fetch_core_registers): Remove functions.
(i286obsd_core_fns): Remove variable.
(i386obsd_init_abi): Initialize TDEP->gregset_reg_offset,
TDEP->gregset_num_regs and TDEP->sizeof_gregset. Set
regset_from_core_section. Use ARRAY_SIZE to initialize
TDEP->sc_num_regs.
(_initialize_i386obsd_tdep): Don't call add_core_fns.
* i386bsd-tdep.c (i386bsd_core_osabi_sniffer): New function.
(_initialize_i386bsd_tdep): Register i386bsd_core_osabi_sniffer.

102
gdb/i386obsd-tdep.c
View File

@ -1,4 +1,5 @@
/* Target-dependent code for OpenBSD/i386.
Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002, 2003
Free Software Foundation, Inc.
@ -23,60 +24,74 @@
#include "arch-utils.h"
#include "gdbcore.h"
#include "regcache.h"
#include "regset.h"
#include "osabi.h"
#include "gdb_assert.h"
#include "gdb_string.h"
#include "i386-tdep.h"
#include "i387-tdep.h"
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_i386obsd_tdep (void);
#define SIZEOF_STRUCT_REG (16 * 4)
/* From <machine/reg.h>. */
static int i386obsd_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 */
};
static void
i386obsd_supply_reg (char *regs, int regno)
i386obsd_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 = regset->descr;
for (i = 0; i <= 15; i++)
if (regno == i || regno == -1)
supply_register (i, regs + i * 4);
gdb_assert (len >= tdep->sizeof_gregset + I387_SIZEOF_FSAVE);
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)
const struct regset *
i386obsd_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;
/* OpenBSD 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 = XMALLOC (struct regset);
tdep->gregset->descr = tdep;
tdep->gregset->supply_regset = i386obsd_aout_supply_regset;
}
return tdep->gregset;
}
regs = core_reg_sect;
fsave = core_reg_sect + SIZEOF_STRUCT_REG;
/* Integer registers. */
i386obsd_supply_reg (regs, -1);
/* Floating point registers. */
i387_supply_fsave (current_regcache, -1, fsave);
return NULL;
}
static struct core_fns i386obsd_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 */
};
CORE_ADDR i386obsd_sigtramp_start = 0xbfbfdf20;
@ -111,6 +126,15 @@ i386obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* Obviously OpenBSD is BSD-based. */
i386bsd_init_abi (info, gdbarch);
/* OpenBSD has a different `struct reg'. */
tdep->gregset_reg_offset = i386obsd_r_reg_offset;
tdep->gregset_num_regs = ARRAY_SIZE (i386obsd_r_reg_offset);
tdep->sizeof_gregset = 16 * 4;
/* OpenBSD has a single register set. */
set_gdbarch_regset_from_core_section
(gdbarch, i386obsd_aout_regset_from_core_section);
/* OpenBSD uses -freg-struct-return by default. */
tdep->struct_return = reg_struct_return;
@ -121,14 +145,16 @@ i386obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* OpenBSD has a `struct sigcontext' that's different from the
origional 4.3 BSD. */
tdep->sc_reg_offset = i386obsd_sc_reg_offset;
tdep->sc_num_regs = I386_NUM_GREGS;
tdep->sc_num_regs = ARRAY_SIZE (i386obsd_sc_reg_offset);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_i386obsd_tdep (void);
void
_initialize_i386obsd_tdep (void)
{
add_core_fns (&i386obsd_core_fns);
/* FIXME: kettenis/20021020: Since OpenBSD/i386 binaries are
indistingushable from NetBSD/i386 a.out binaries, building a GDB
that should support both these targets will probably not work as