mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 04:12:10 +08:00
146 lines
4.2 KiB
C
146 lines
4.2 KiB
C
/* Native dependent code for Mach 386's for GDB, the GNU debugger.
|
|
Copyright (C) 1986, 1987, 1989, 1991, 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
|
#include "defs.h"
|
|
#include "frame.h"
|
|
#include "inferior.h"
|
|
#include "gdbcore.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 <sys/stat.h>
|
|
#include <sys/core.h>
|
|
|
|
|
|
|
|
void
|
|
fetch_inferior_registers (regno)
|
|
int regno; /* Original value discarded */
|
|
{
|
|
struct regs inferior_registers;
|
|
struct fp_state inferior_fp_registers;
|
|
extern char registers[];
|
|
|
|
registers_fetched ();
|
|
|
|
ptrace (PTRACE_GETREGS, inferior_pid,
|
|
(PTRACE_ARG3_TYPE) &inferior_registers);
|
|
ptrace (PTRACE_GETFPREGS, inferior_pid,
|
|
(PTRACE_ARG3_TYPE) &inferior_fp_registers);
|
|
|
|
bcopy (&inferior_registers, registers, sizeof inferior_registers);
|
|
|
|
bcopy (inferior_fp_registers.f_st,®isters[REGISTER_BYTE (FP0_REGNUM)],
|
|
sizeof inferior_fp_registers.f_st);
|
|
bcopy (&inferior_fp_registers.f_ctrl,
|
|
®isters[REGISTER_BYTE (FPC_REGNUM)],
|
|
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 (regno)
|
|
int regno;
|
|
{
|
|
struct regs inferior_registers;
|
|
struct fp_state inferior_fp_registers;
|
|
extern char registers[];
|
|
|
|
bcopy (registers, &inferior_registers, 20 * 4);
|
|
|
|
bcopy (®isters[REGISTER_BYTE (FP0_REGNUM)],inferior_fp_registers.f_st,
|
|
sizeof inferior_fp_registers.f_st);
|
|
bcopy (®isters[REGISTER_BYTE (FPC_REGNUM)],
|
|
&inferior_fp_registers.f_ctrl,
|
|
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, inferior_pid,
|
|
(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, inferior_pid,
|
|
(PTRACE_ARG3_TYPE) &inferior_registers);
|
|
ptrace (PTRACE_POKEDATA, inferior_pid, (PTRACE_ARG3_TYPE) stack, 0xc589);
|
|
ptrace (PTRACE_SINGLESTEP, inferior_pid, (PTRACE_ARG3_TYPE) stack, 0);
|
|
wait (0);
|
|
ptrace (PTRACE_POKEDATA, inferior_pid, (PTRACE_ARG3_TYPE) stack, stuff);
|
|
inferior_registers.r_reg[EAX] = reg;
|
|
}
|
|
#endif
|
|
ptrace (PTRACE_SETREGS, inferior_pid,
|
|
(PTRACE_ARG3_TYPE) &inferior_registers);
|
|
ptrace (PTRACE_SETFPREGS, inferior_pid,
|
|
(PTRACE_ARG3_TYPE) &inferior_fp_registers);
|
|
}
|
|
|
|
|
|
|
|
/* Work with core files, for GDB. */
|
|
|
|
void
|
|
fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
|
|
char *core_reg_sect;
|
|
unsigned core_reg_size;
|
|
int which;
|
|
unsigned int reg_addr; /* Unused in this version */
|
|
{
|
|
int val;
|
|
extern char registers[];
|
|
|
|
switch (which) {
|
|
case 0:
|
|
case 1:
|
|
bcopy (core_reg_sect, registers, core_reg_size);
|
|
break;
|
|
|
|
case 2:
|
|
#ifdef FP0_REGNUM
|
|
bcopy (core_reg_sect,
|
|
®isters[REGISTER_BYTE (FP0_REGNUM)],
|
|
core_reg_size); /* FIXME, probably bogus */
|
|
#endif
|
|
#ifdef FPC_REGNUM
|
|
bcopy (&corestr.c_fpu.f_fpstatus.f_ctrl,
|
|
®isters[REGISTER_BYTE (FPC_REGNUM)],
|
|
sizeof corestr.c_fpu.f_fpstatus -
|
|
sizeof corestr.c_fpu.f_fpstatus.f_st);
|
|
#endif
|
|
break;
|
|
}
|
|
}
|