185 lines
4.1 KiB
C
185 lines
4.1 KiB
C
/* Low level MIPS interface to ptrace, for GDB when running under Unix.
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Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc.
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Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
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and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdio.h>
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#ifdef sgi
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#include <sys/inst.h>
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#else
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#include <mips/inst.h>
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#endif
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#include "defs.h"
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#include "frame.h"
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#include "inferior.h"
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#include "symtab.h"
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#include "value.h"
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#ifdef USG
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#include <sys/types.h>
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#endif
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <signal.h>
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#include <sys/ioctl.h>
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/* #include <fcntl.h> Can we live without this? */
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#include "gdbcore.h"
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#include <sys/user.h> /* After a.out.h */
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#include <sys/file.h>
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#include <sys/stat.h>
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/* For now we stub this out; sgi format is super-hairy (and completely
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different in the new release) */
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#ifdef sgi
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void
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fetch_core_registers ()
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{
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return;
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}
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/* ARGSUSED */
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void
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fetch_inferior_registers (regno)
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int regno;
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{
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return;
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}
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/* ARGSUSED */
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void
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store_inferior_registers (regno)
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int regno;
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{
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return;
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}
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#else
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/* Map gdb internal register number to ptrace address. */
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#define REGISTER_PTRACE_ADDR(regno) \
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(regno < 32 ? regno \
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: regno == PC_REGNUM ? 96 \
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: regno == CAUSE_REGNUM ? 97 \
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: regno == HI_REGNUM ? 98 \
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: regno == LO_REGNUM ? 99 \
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: regno == FCRCS_REGNUM ? 100 \
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: regno == FCRIR_REGNUM ? 101 \
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: regno >= FP0_REGNUM ? regno - (FP0_REGNUM-32)\
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: 0)
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/* Get all registers from the inferior */
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void
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fetch_inferior_registers (regno)
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int regno;
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{
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register unsigned int regaddr;
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char buf[MAX_REGISTER_RAW_SIZE];
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register int i;
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registers_fetched ();
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for (regno = 1; regno < NUM_REGS; regno++)
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{
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regaddr = REGISTER_PTRACE_ADDR (regno);
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for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
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{
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*(int *) &buf[i] = ptrace (3, inferior_pid, regaddr, 0);
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regaddr += sizeof (int);
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}
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supply_register (regno, buf);
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}
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}
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/* Store our register values back into the inferior.
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If REGNO is -1, do this for all registers.
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Otherwise, REGNO specifies which register (so we can save time). */
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void
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store_inferior_registers (regno)
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int regno;
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{
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register unsigned int regaddr;
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char buf[80];
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if (regno == 0)
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return;
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if (regno > 0)
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{
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regaddr = REGISTER_PTRACE_ADDR (regno);
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errno = 0;
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ptrace (6, inferior_pid, regaddr, read_register (regno));
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if (errno != 0)
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{
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sprintf (buf, "writing register number %d", regno);
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perror_with_name (buf);
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}
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}
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else
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{
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for (regno = 0; regno < NUM_REGS; regno++)
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{
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if (regno == ZERO_REGNUM || regno == PS_REGNUM
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|| regno == BADVADDR_REGNUM || regno == CAUSE_REGNUM
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|| regno == FCRIR_REGNUM || regno == FP_REGNUM)
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continue;
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regaddr = register_addr (regno, 1);
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errno = 0;
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ptrace (6, inferior_pid, regaddr, read_register (regno));
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if (errno != 0)
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{
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sprintf (buf, "writing all regs, number %d", regno);
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perror_with_name (buf);
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}
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}
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}
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}
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#endif /* sgi */
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#if 0
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void
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fetch_core_registers ()
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{
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register int regno;
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int val;
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for (regno = 1; regno < NUM_REGS; regno++) {
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char buf[MAX_REGISTER_RAW_SIZE];
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val = bfd_seek (core_bfd, register_addr (regno, 0));
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if (val < 0 || (val = bfd_read (core_bfd, buf, sizeof buf)) < 0) {
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char buffer[50];
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strcpy (buffer, "Reading register ");
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strcat (buffer, reg_names[regno]);
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perror_with_name (buffer);
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}
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supply_register (regno, buf);
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}
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}
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#endif /* 0 */
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