164 lines
4.2 KiB
C
164 lines
4.2 KiB
C
/* Low level MIPS interface to ptrace, for GDB when running under Unix.
|
|
Copyright 1988, 1989, 1991, 1992 Free Software Foundation, Inc.
|
|
Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
|
|
and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
|
|
|
|
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 "inferior.h"
|
|
#include "gdbcore.h"
|
|
|
|
/* For now we stub this out; sgi core format is super-hairy (and completely
|
|
different in the new release).
|
|
For most mips systems, this function is defined in coredep.c. */
|
|
|
|
#if defined(sgi)
|
|
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;
|
|
{
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
/* Access to the inferior is only good for native systems, not cross.
|
|
I am not sure why this is stubbed out on SGI... --gnu@cygnus.com */
|
|
|
|
#if defined(sgi) || !defined(GDB_TARGET_IS_MIPS)
|
|
|
|
/* ARGSUSED */
|
|
void
|
|
fetch_inferior_registers (regno)
|
|
int regno;
|
|
{
|
|
return;
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
void
|
|
store_inferior_registers (regno)
|
|
int regno;
|
|
{
|
|
return;
|
|
}
|
|
|
|
|
|
#else
|
|
|
|
/* DECstation native... */
|
|
|
|
#include <sys/ptrace.h>
|
|
|
|
/* Map gdb internal register number to ptrace ``address''.
|
|
These ``addresses'' are defined in DECstation <sys/ptrace.h> */
|
|
|
|
#define REGISTER_PTRACE_ADDR(regno) \
|
|
(regno < 32 ? GPR_BASE + regno \
|
|
: regno == PC_REGNUM ? PC \
|
|
: regno == CAUSE_REGNUM ? CAUSE \
|
|
: regno == HI_REGNUM ? MMHI \
|
|
: regno == LO_REGNUM ? MMLO \
|
|
: regno == FCRCS_REGNUM ? FPC_CSR \
|
|
: regno == FCRIR_REGNUM ? FPC_EIR \
|
|
: regno >= FP0_REGNUM ? FPR_BASE + (regno - FP0_REGNUM) \
|
|
: 0)
|
|
|
|
static const char zerobuf[MAX_REGISTER_RAW_SIZE];
|
|
|
|
/* Get all registers from the inferior */
|
|
|
|
void
|
|
fetch_inferior_registers (regno)
|
|
int regno;
|
|
{
|
|
register unsigned int regaddr;
|
|
char buf[MAX_REGISTER_RAW_SIZE];
|
|
register int i;
|
|
|
|
registers_fetched ();
|
|
|
|
for (regno = 1; regno < NUM_REGS; regno++)
|
|
{
|
|
regaddr = REGISTER_PTRACE_ADDR (regno);
|
|
for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
|
|
{
|
|
*(int *) &buf[i] = ptrace (PT_READ_U, inferior_pid,
|
|
(PTRACE_ARG3_TYPE) regaddr, 0);
|
|
regaddr += sizeof (int);
|
|
}
|
|
supply_register (regno, buf);
|
|
}
|
|
|
|
supply_register (ZERO_REGNUM, zerobuf);
|
|
/* Frame ptr reg must appear to be 0; it is faked by stack handling code. */
|
|
supply_register (FP_REGNUM, zerobuf);
|
|
}
|
|
|
|
/* 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;
|
|
{
|
|
register unsigned int regaddr;
|
|
char buf[80];
|
|
|
|
if (regno == 0)
|
|
return;
|
|
|
|
if (regno > 0)
|
|
{
|
|
regaddr = REGISTER_PTRACE_ADDR (regno);
|
|
errno = 0;
|
|
ptrace (PT_WRITE_U, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
|
|
read_register (regno));
|
|
if (errno != 0)
|
|
{
|
|
sprintf (buf, "writing register number %d", regno);
|
|
perror_with_name (buf);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (regno = 0; regno < NUM_REGS; regno++)
|
|
{
|
|
if (regno == ZERO_REGNUM || regno == PS_REGNUM
|
|
|| regno == BADVADDR_REGNUM || regno == CAUSE_REGNUM
|
|
|| regno == FCRIR_REGNUM || regno == FP_REGNUM
|
|
|| (regno >= FIRST_EMBED_REGNUM && regno <= LAST_EMBED_REGNUM))
|
|
continue;
|
|
regaddr = register_addr (regno, 1);
|
|
errno = 0;
|
|
ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
|
|
read_register (regno));
|
|
if (errno != 0)
|
|
{
|
|
sprintf (buf, "writing all regs, number %d", regno);
|
|
perror_with_name (buf);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif /* sgi */
|