199b2450f6
Change all references to stdout/stderr to gdb_stdout/gdb_stderr. Replace all calls to stdio output functions with calls to corresponding _unfiltered functions (`fprintf_unfiltered') Replaced calls to fopen for output to gdb_fopen. Added sufficient goo to utils.c and defs.h to make the above work. The net effect is that stdio output functions are only directly used in utils.c. Elsewhere, the _unfiltered and _filtered functions and GDB_FILE type are used. In the near future, GDB_FILE will stop being equivalant to FILE. The semantics of some commands has changed in a very subtle way: called in the right context, they may cause new occurences of prompt_for_continue() behavior. The testsuite doesn't notice anything like this, though. Please respect this change by not reintroducing stdio output dependencies in the main body of gdb code. All output from commands should go to a GDB_FILE. Target-specific code can still use stdio directly to communicate with targets.
248 lines
7.1 KiB
C
248 lines
7.1 KiB
C
/* IBM RS/6000 native-dependent code for GDB, the GNU debugger.
|
|
Copyright 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 "inferior.h"
|
|
#include "target.h"
|
|
|
|
#include <sys/ptrace.h>
|
|
#include <sys/reg.h>
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/dir.h>
|
|
#include <sys/user.h>
|
|
#include <signal.h>
|
|
#include <sys/ioctl.h>
|
|
#include <fcntl.h>
|
|
|
|
#include <a.out.h>
|
|
#include <sys/file.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/core.h>
|
|
|
|
extern int errno;
|
|
|
|
static void
|
|
exec_one_dummy_insn PARAMS ((void));
|
|
|
|
/* Conversion from gdb-to-system special purpose register numbers.. */
|
|
|
|
static int special_regs[] = {
|
|
IAR, /* PC_REGNUM */
|
|
MSR, /* PS_REGNUM */
|
|
CR, /* CR_REGNUM */
|
|
LR, /* LR_REGNUM */
|
|
CTR, /* CTR_REGNUM */
|
|
XER, /* XER_REGNUM */
|
|
MQ /* MQ_REGNUM */
|
|
};
|
|
|
|
void
|
|
fetch_inferior_registers (regno)
|
|
int regno;
|
|
{
|
|
int ii;
|
|
extern char registers[];
|
|
|
|
if (regno < 0) { /* for all registers */
|
|
|
|
/* read 32 general purpose registers. */
|
|
|
|
for (ii=0; ii < 32; ++ii)
|
|
*(int*)®isters[REGISTER_BYTE (ii)] =
|
|
ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) ii, 0, 0);
|
|
|
|
/* read general purpose floating point registers. */
|
|
|
|
for (ii=0; ii < 32; ++ii)
|
|
ptrace (PT_READ_FPR, inferior_pid,
|
|
(PTRACE_ARG3_TYPE) ®isters [REGISTER_BYTE (FP0_REGNUM+ii)],
|
|
FPR0+ii, 0);
|
|
|
|
/* read special registers. */
|
|
for (ii=0; ii <= LAST_SP_REGNUM-FIRST_SP_REGNUM; ++ii)
|
|
*(int*)®isters[REGISTER_BYTE (FIRST_SP_REGNUM+ii)] =
|
|
ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) special_regs[ii],
|
|
0, 0);
|
|
|
|
registers_fetched ();
|
|
return;
|
|
}
|
|
|
|
/* else an individual register is addressed. */
|
|
|
|
else if (regno < FP0_REGNUM) { /* a GPR */
|
|
*(int*)®isters[REGISTER_BYTE (regno)] =
|
|
ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) regno, 0, 0);
|
|
}
|
|
else if (regno <= FPLAST_REGNUM) { /* a FPR */
|
|
ptrace (PT_READ_FPR, inferior_pid,
|
|
(PTRACE_ARG3_TYPE) ®isters [REGISTER_BYTE (regno)],
|
|
(regno-FP0_REGNUM+FPR0), 0);
|
|
}
|
|
else if (regno <= LAST_SP_REGNUM) { /* a special register */
|
|
*(int*)®isters[REGISTER_BYTE (regno)] =
|
|
ptrace (PT_READ_GPR, inferior_pid,
|
|
(PTRACE_ARG3_TYPE) special_regs[regno-FIRST_SP_REGNUM], 0, 0);
|
|
}
|
|
else
|
|
fprintf_unfiltered (gdb_stderr, "gdb error: register no %d not implemented.\n", regno);
|
|
|
|
register_valid [regno] = 1;
|
|
}
|
|
|
|
/* 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;
|
|
{
|
|
extern char registers[];
|
|
|
|
errno = 0;
|
|
|
|
if (regno == -1) { /* for all registers.. */
|
|
int ii;
|
|
|
|
/* execute one dummy instruction (which is a breakpoint) in inferior
|
|
process. So give kernel a chance to do internal house keeping.
|
|
Otherwise the following ptrace(2) calls will mess up user stack
|
|
since kernel will get confused about the bottom of the stack (%sp) */
|
|
|
|
exec_one_dummy_insn ();
|
|
|
|
/* write general purpose registers first! */
|
|
for ( ii=GPR0; ii<=GPR31; ++ii) {
|
|
ptrace (PT_WRITE_GPR, inferior_pid, (PTRACE_ARG3_TYPE) ii,
|
|
*(int*)®isters[REGISTER_BYTE (ii)], 0);
|
|
if ( errno ) {
|
|
perror ("ptrace write_gpr"); errno = 0;
|
|
}
|
|
}
|
|
|
|
/* write floating point registers now. */
|
|
for ( ii=0; ii < 32; ++ii) {
|
|
ptrace (PT_WRITE_FPR, inferior_pid,
|
|
(PTRACE_ARG3_TYPE) ®isters[REGISTER_BYTE (FP0_REGNUM+ii)],
|
|
FPR0+ii, 0);
|
|
if ( errno ) {
|
|
perror ("ptrace write_fpr"); errno = 0;
|
|
}
|
|
}
|
|
|
|
/* write special registers. */
|
|
for (ii=0; ii <= LAST_SP_REGNUM-FIRST_SP_REGNUM; ++ii) {
|
|
ptrace (PT_WRITE_GPR, inferior_pid,
|
|
(PTRACE_ARG3_TYPE) special_regs[ii],
|
|
*(int*)®isters[REGISTER_BYTE (FIRST_SP_REGNUM+ii)], 0);
|
|
if ( errno ) {
|
|
perror ("ptrace write_gpr"); errno = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* else, a specific register number is given... */
|
|
|
|
else if (regno < FP0_REGNUM) { /* a GPR */
|
|
|
|
ptrace (PT_WRITE_GPR, inferior_pid, (PTRACE_ARG3_TYPE) regno,
|
|
*(int*)®isters[REGISTER_BYTE (regno)], 0);
|
|
}
|
|
|
|
else if (regno <= FPLAST_REGNUM) { /* a FPR */
|
|
ptrace (PT_WRITE_FPR, inferior_pid,
|
|
(PTRACE_ARG3_TYPE) ®isters[REGISTER_BYTE (regno)],
|
|
regno-FP0_REGNUM+FPR0, 0);
|
|
}
|
|
|
|
else if (regno <= LAST_SP_REGNUM) { /* a special register */
|
|
|
|
ptrace (PT_WRITE_GPR, inferior_pid,
|
|
(PTRACE_ARG3_TYPE) special_regs [regno-FIRST_SP_REGNUM],
|
|
*(int*)®isters[REGISTER_BYTE (regno)], 0);
|
|
}
|
|
|
|
else
|
|
fprintf_unfiltered (gdb_stderr, "Gdb error: register no %d not implemented.\n", regno);
|
|
|
|
if ( errno ) {
|
|
perror ("ptrace write"); errno = 0;
|
|
}
|
|
}
|
|
|
|
/* Execute one dummy breakpoint instruction. This way we give the kernel
|
|
a chance to do some housekeeping and update inferior's internal data,
|
|
including u_area. */
|
|
static void
|
|
exec_one_dummy_insn ()
|
|
{
|
|
#define DUMMY_INSN_ADDR (TEXT_SEGMENT_BASE)+0x200
|
|
|
|
unsigned long shadow;
|
|
unsigned int status, pid;
|
|
|
|
/* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We assume that
|
|
this address will never be executed again by the real code. */
|
|
|
|
target_insert_breakpoint (DUMMY_INSN_ADDR, &shadow);
|
|
|
|
errno = 0;
|
|
ptrace (PT_CONTINUE, inferior_pid, (PTRACE_ARG3_TYPE) DUMMY_INSN_ADDR, 0, 0);
|
|
if (errno)
|
|
perror ("pt_continue");
|
|
|
|
do {
|
|
pid = wait (&status);
|
|
} while (pid != inferior_pid);
|
|
|
|
target_remove_breakpoint (DUMMY_INSN_ADDR, &shadow);
|
|
}
|
|
|
|
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 */
|
|
{
|
|
/* fetch GPRs and special registers from the first register section
|
|
in core bfd. */
|
|
if (which == 0) {
|
|
|
|
/* copy GPRs first. */
|
|
memcpy (registers, core_reg_sect, 32 * 4);
|
|
|
|
/* gdb's internal register template and bfd's register section layout
|
|
should share a common include file. FIXMEmgo */
|
|
/* then comes special registes. They are supposed to be in the same
|
|
order in gdb template and bfd `.reg' section. */
|
|
core_reg_sect += (32 * 4);
|
|
memcpy (®isters [REGISTER_BYTE (FIRST_SP_REGNUM)], core_reg_sect,
|
|
(LAST_SP_REGNUM - FIRST_SP_REGNUM + 1) * 4);
|
|
}
|
|
|
|
/* fetch floating point registers from register section 2 in core bfd. */
|
|
else if (which == 2)
|
|
memcpy (®isters [REGISTER_BYTE (FP0_REGNUM)], core_reg_sect, 32 * 8);
|
|
|
|
else
|
|
fprintf_unfiltered (gdb_stderr, "Gdb error: unknown parameter to fetch_core_registers().\n");
|
|
}
|