mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-05 08:14:19 +08:00
173 lines
5.2 KiB
C
173 lines
5.2 KiB
C
/* Native dependent code for Mach 386's for GDB, the GNU debugger.
|
||
Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1995, 1996, 1999, 2000,
|
||
2001 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 "frame.h"
|
||
#include "inferior.h"
|
||
#include "gdbcore.h"
|
||
#include "regcache.h"
|
||
|
||
#include <sys/param.h>
|
||
#include <sys/dir.h>
|
||
#include <sys/user.h>
|
||
#include <signal.h>
|
||
#include <sys/ioctl.h>
|
||
#include <fcntl.h>
|
||
|
||
#include <sys/ptrace.h>
|
||
#include <machine/reg.h>
|
||
|
||
#include <sys/file.h>
|
||
#include "gdb_stat.h"
|
||
#include <sys/core.h>
|
||
|
||
static void fetch_core_registers (char *, unsigned, int, CORE_ADDR);
|
||
|
||
void
|
||
fetch_inferior_registers (int regno)
|
||
{
|
||
struct regs inferior_registers;
|
||
struct fp_state inferior_fp_registers;
|
||
|
||
registers_fetched ();
|
||
|
||
ptrace (PTRACE_GETREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_ARG3_TYPE) & inferior_registers);
|
||
ptrace (PTRACE_GETFPREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_ARG3_TYPE) & inferior_fp_registers);
|
||
|
||
memcpy (registers, &inferior_registers, sizeof inferior_registers);
|
||
|
||
memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)],
|
||
inferior_fp_registers.f_st,
|
||
sizeof inferior_fp_registers.f_st);
|
||
memcpy (®isters[REGISTER_BYTE (FPC_REGNUM)],
|
||
&inferior_fp_registers.f_ctrl,
|
||
sizeof inferior_fp_registers - sizeof inferior_fp_registers.f_st);
|
||
}
|
||
|
||
/* Store our register values back into the inferior.
|
||
If REGNO is -1, do this for all registers.
|
||
Otherwise, REGNO specifies which register (so we can save time). */
|
||
|
||
void
|
||
store_inferior_registers (int regno)
|
||
{
|
||
struct regs inferior_registers;
|
||
struct fp_state inferior_fp_registers;
|
||
|
||
memcpy (&inferior_registers, registers, 20 * 4);
|
||
|
||
memcpy (inferior_fp_registers.f_st, ®isters[REGISTER_BYTE (FP0_REGNUM)],
|
||
sizeof inferior_fp_registers.f_st);
|
||
memcpy (&inferior_fp_registers.f_ctrl,
|
||
®isters[REGISTER_BYTE (FPC_REGNUM)],
|
||
sizeof inferior_fp_registers - sizeof inferior_fp_registers.f_st);
|
||
|
||
#ifdef PTRACE_FP_BUG
|
||
if (regno == FP_REGNUM || regno == -1)
|
||
/* Storing the frame pointer requires a gross hack, in which an
|
||
instruction that moves eax into ebp gets single-stepped. */
|
||
{
|
||
int stack = inferior_registers.r_reg[SP_REGNUM];
|
||
int stuff = ptrace (PTRACE_PEEKDATA, PIDGET (inferior_ptid),
|
||
(PTRACE_ARG3_TYPE) stack);
|
||
int reg = inferior_registers.r_reg[EAX];
|
||
inferior_registers.r_reg[EAX] =
|
||
inferior_registers.r_reg[FP_REGNUM];
|
||
ptrace (PTRACE_SETREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_ARG3_TYPE) & inferior_registers);
|
||
ptrace (PTRACE_POKEDATA, PIDGET (inferior_ptid),
|
||
(PTRACE_ARG3_TYPE) stack, 0xc589);
|
||
ptrace (PTRACE_SINGLESTEP, PIDGET (inferior_ptid),
|
||
(PTRACE_ARG3_TYPE) stack, 0);
|
||
wait (0);
|
||
ptrace (PTRACE_POKEDATA, PIDGET (inferior_ptid),
|
||
(PTRACE_ARG3_TYPE) stack, stuff);
|
||
inferior_registers.r_reg[EAX] = reg;
|
||
}
|
||
#endif
|
||
ptrace (PTRACE_SETREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_ARG3_TYPE) & inferior_registers);
|
||
ptrace (PTRACE_SETFPREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_ARG3_TYPE) & inferior_fp_registers);
|
||
}
|
||
|
||
|
||
|
||
/* Provide registers to GDB from a core file.
|
||
|
||
CORE_REG_SECT points to an array of bytes, which were obtained from
|
||
a core file which BFD thinks might contain register contents.
|
||
CORE_REG_SIZE is its size.
|
||
|
||
WHICH says which register set corelow suspects this is:
|
||
0 --- the general-purpose register set
|
||
2 --- the floating-point register set
|
||
|
||
REG_ADDR isn't used. */
|
||
|
||
static void
|
||
fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
|
||
int which, CORE_ADDR reg_addr)
|
||
{
|
||
int val;
|
||
|
||
switch (which)
|
||
{
|
||
case 0:
|
||
case 1:
|
||
memcpy (registers, core_reg_sect, core_reg_size);
|
||
break;
|
||
|
||
case 2:
|
||
memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)],
|
||
core_reg_sect,
|
||
core_reg_size); /* FIXME, probably bogus */
|
||
#ifdef FPC_REGNUM
|
||
memcpy (®isters[REGISTER_BYTE (FPC_REGNUM)],
|
||
&corestr.c_fpu.f_fpstatus.f_ctrl,
|
||
sizeof corestr.c_fpu.f_fpstatus -
|
||
sizeof corestr.c_fpu.f_fpstatus.f_st);
|
||
#endif
|
||
break;
|
||
}
|
||
}
|
||
|
||
|
||
/* Register that we are able to handle i386mach core file formats.
|
||
FIXME: is this really bfd_target_unknown_flavour? */
|
||
|
||
static struct core_fns i386mach_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 */
|
||
};
|
||
|
||
void
|
||
_initialize_core_i386mach (void)
|
||
{
|
||
add_core_fns (&i386mach_core_fns);
|
||
}
|