#include "defs.h"
#include "arch-utils.h"
#include "gdbcore.h"
#include "regcache.h"
#include "regset.h"
#include "osabi.h"
#include "target.h"
#include "gdb_assert.h"
#include "gdb_string.h"
#include "i386-tdep.h"
#include "i387-tdep.h"
#include "solib-svr4.h"
static const int i386obsd_page_size = 4096;
static int
i386obsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
{
CORE_ADDR start_pc = (pc & ~(i386obsd_page_size - 1));
const char sigreturn[] =
{
0xb8,
0x67, 0x00, 0x00, 0x00,
0xcd, 0x80
};
char *buf;
if (name && name[0] != '<')
return 0;
buf = alloca (sizeof sigreturn);
if (target_read_memory (start_pc + 0x14, buf, sizeof sigreturn))
return 0;
if (memcmp (buf, sigreturn, sizeof sigreturn) == 0)
return 1;
return i386bsd_pc_in_sigtramp (pc, name);
}
static CORE_ADDR
i386obsd_sigtramp_start (CORE_ADDR pc)
{
CORE_ADDR start_pc = (pc & ~(i386obsd_page_size - 1));
if (i386bsd_pc_in_sigtramp (pc, NULL))
return i386bsd_sigtramp_start (pc);
return start_pc;
}
static CORE_ADDR
i386obsd_sigtramp_end (CORE_ADDR pc)
{
CORE_ADDR start_pc = (pc & ~(i386obsd_page_size - 1));
if (i386bsd_pc_in_sigtramp (pc, NULL))
return i386bsd_sigtramp_end (pc);
return start_pc + 0x22;
}
static int i386obsd_r_reg_offset[] =
{
0 * 4,
1 * 4,
2 * 4,
3 * 4,
4 * 4,
5 * 4,
6 * 4,
7 * 4,
8 * 4,
9 * 4,
10 * 4,
11 * 4,
12 * 4,
13 * 4,
14 * 4,
15 * 4
};
static void
i386obsd_aout_supply_regset (const struct regset *regset,
struct regcache *regcache, int regnum,
const void *regs, size_t len)
{
const struct gdbarch_tdep *tdep = regset->descr;
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 const struct regset *
i386obsd_aout_regset_from_core_section (struct gdbarch *gdbarch,
const char *sect_name,
size_t sect_size)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
if (strcmp (sect_name, ".reg") == 0
&& sect_size >= tdep->sizeof_gregset + I387_SIZEOF_FSAVE)
{
if (tdep->gregset == NULL)
{
tdep->gregset = XMALLOC (struct regset);
tdep->gregset->descr = tdep;
tdep->gregset->supply_regset = i386obsd_aout_supply_regset;
}
return tdep->gregset;
}
return NULL;
}
CORE_ADDR i386obsd_sigtramp_start_addr = 0xbfbfdf20;
CORE_ADDR i386obsd_sigtramp_end_addr = 0xbfbfdff0;
int i386obsd_sc_reg_offset[I386_NUM_GREGS] =
{
10 * 4,
9 * 4,
8 * 4,
7 * 4,
14 * 4,
6 * 4,
5 * 4,
4 * 4,
11 * 4,
13 * 4,
12 * 4,
15 * 4,
3 * 4,
2 * 4,
1 * 4,
0 * 4
};
static void
i386obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
i386bsd_init_abi (info, gdbarch);
tdep->gregset_reg_offset = i386obsd_r_reg_offset;
tdep->gregset_num_regs = ARRAY_SIZE (i386obsd_r_reg_offset);
tdep->sizeof_gregset = 16 * 4;
tdep->struct_return = reg_struct_return;
tdep->sigtramp_start = i386obsd_sigtramp_start_addr;
tdep->sigtramp_end = i386obsd_sigtramp_end_addr;
set_gdbarch_pc_in_sigtramp (gdbarch, i386obsd_pc_in_sigtramp);
set_gdbarch_sigtramp_start (gdbarch, i386obsd_sigtramp_start);
set_gdbarch_sigtramp_end (gdbarch, i386obsd_sigtramp_end);
tdep->sc_reg_offset = i386obsd_sc_reg_offset;
tdep->sc_num_regs = ARRAY_SIZE (i386obsd_sc_reg_offset);
}
static void
i386obsd_aout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
i386obsd_init_abi (info, gdbarch);
set_gdbarch_regset_from_core_section
(gdbarch, i386obsd_aout_regset_from_core_section);
}
static void
i386obsd_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
i386obsd_init_abi (info, gdbarch);
i386_elf_init_abi (info, gdbarch);
set_gdbarch_in_solib_call_trampoline
(gdbarch, generic_in_solib_call_trampoline);
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
}
void _initialize_i386obsd_tdep (void);
void
_initialize_i386obsd_tdep (void)
{
#define GDB_OSABI_OPENBSD_AOUT GDB_OSABI_NETBSD_AOUT
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_OPENBSD_AOUT,
i386obsd_aout_init_abi);
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_OPENBSD_ELF,
i386obsd_elf_init_abi);
}