mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 04:12:10 +08:00
524d7c188c
* regcache.h (deprecated_registers): Rename registers. * a68v-nat.c, alpha-nat.c, arch-utils.c, core-sol2.c: Update. * hp300ux-nat.c, hppab-nat.c, hppah-nat.c: Update. * hppam3-nat.c, hpux-thread.c, i386gnu-nat.c: Update. * ia64-aix-nat.c, ia64-linux-nat.c, ia64-tdep.c: Update. * irix4-nat.c, irix5-nat.c, lynx-nat.c, m68k-tdep.c: Update. * m68knbsd-nat.c, mips-linux-tdep.c, mipsm3-nat.c: Update. * mipsv4-nat.c, ns32knbsd-nat.c, ppc-bdm.c: Update. * ppc-sysv-tdep.c, ptx4-nat.c, regcache.c, remote-es.c: Update. * remote-sds.c, remote-vx68.c, remote-vxmips.c: Update. * remote-vxsparc.c, rs6000-tdep.c, sol-thread.c: Update. * sparc-nat.c, sparc-tdep.c, sun3-nat.c, symm-nat.c: Update. * v850ice.c: Update.
215 lines
6.1 KiB
C
215 lines
6.1 KiB
C
/* Machine-dependent hooks for the unix child process stratum. This
|
|
code is for the HP PA-RISC cpu.
|
|
|
|
Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1998,
|
|
1999, 2000, 2001 Free Software Foundation, Inc.
|
|
|
|
Contributed by the Center for Software Science at the
|
|
University of Utah (pa-gdb-bugs@cs.utah.edu).
|
|
|
|
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 "inferior.h"
|
|
#include "target.h"
|
|
#include "regcache.h"
|
|
#include <sys/ptrace.h>
|
|
|
|
/* Use an extra level of indirection for ptrace calls.
|
|
This lets us breakpoint usefully on call_ptrace. It also
|
|
allows us to pass an extra argument to ptrace without
|
|
using an ANSI-C specific macro. */
|
|
|
|
#define ptrace call_ptrace
|
|
|
|
#if !defined (offsetof)
|
|
#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
|
|
#endif
|
|
|
|
/* U_REGS_OFFSET is the offset of the registers within the u area. */
|
|
#if !defined (U_REGS_OFFSET)
|
|
#define U_REGS_OFFSET \
|
|
ptrace (PT_READ_U, PIDGET (inferior_ptid), \
|
|
(PTRACE_ARG3_TYPE) (offsetof (struct user, u_ar0)), 0) \
|
|
- KERNEL_U_ADDR
|
|
#endif
|
|
|
|
/* Fetch one register. */
|
|
|
|
static void
|
|
fetch_register (int regno)
|
|
{
|
|
register unsigned int regaddr;
|
|
char buf[MAX_REGISTER_RAW_SIZE];
|
|
register int i;
|
|
|
|
/* Offset of registers within the u area. */
|
|
unsigned int offset;
|
|
|
|
offset = U_REGS_OFFSET;
|
|
|
|
regaddr = register_addr (regno, offset);
|
|
for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
|
|
{
|
|
errno = 0;
|
|
*(int *) &buf[i] = ptrace (PT_RUREGS, PIDGET (inferior_ptid),
|
|
(PTRACE_ARG3_TYPE) regaddr, 0);
|
|
regaddr += sizeof (int);
|
|
if (errno != 0)
|
|
{
|
|
/* Warning, not error, in case we are attached; sometimes the
|
|
kernel doesn't let us at the registers. */
|
|
char *err = safe_strerror (errno);
|
|
char *msg = alloca (strlen (err) + 128);
|
|
sprintf (msg, "reading register %s: %s", REGISTER_NAME (regno), err);
|
|
warning (msg);
|
|
goto error_exit;
|
|
}
|
|
}
|
|
supply_register (regno, buf);
|
|
error_exit:;
|
|
}
|
|
|
|
/* Fetch all registers, or just one, from the child process. */
|
|
|
|
void
|
|
fetch_inferior_registers (int regno)
|
|
{
|
|
if (regno == -1)
|
|
for (regno = 0; regno < NUM_REGS; regno++)
|
|
fetch_register (regno);
|
|
else
|
|
fetch_register (regno);
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
register unsigned int regaddr;
|
|
char buf[80];
|
|
register int i;
|
|
unsigned int offset = U_REGS_OFFSET;
|
|
int scratch;
|
|
|
|
if (regno >= 0)
|
|
{
|
|
if (CANNOT_STORE_REGISTER (regno))
|
|
return;
|
|
regaddr = register_addr (regno, offset);
|
|
errno = 0;
|
|
if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM)
|
|
{
|
|
scratch = *(int *) &deprecated_registers[REGISTER_BYTE (regno)] | 0x3;
|
|
ptrace (PT_WUREGS, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) regaddr,
|
|
scratch);
|
|
if (errno != 0)
|
|
{
|
|
/* Error, even if attached. Failing to write these two
|
|
registers is pretty serious. */
|
|
sprintf (buf, "writing register number %d", regno);
|
|
perror_with_name (buf);
|
|
}
|
|
}
|
|
else
|
|
for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
|
|
{
|
|
errno = 0;
|
|
ptrace (PT_WUREGS, PIDGET (inferior_ptid),
|
|
(PTRACE_ARG3_TYPE) regaddr,
|
|
*(int *) &deprecated_registers[REGISTER_BYTE (regno) + i]);
|
|
if (errno != 0)
|
|
{
|
|
/* Warning, not error, in case we are attached; sometimes the
|
|
kernel doesn't let us at the registers. */
|
|
char *err = safe_strerror (errno);
|
|
char *msg = alloca (strlen (err) + 128);
|
|
sprintf (msg, "writing register %s: %s",
|
|
REGISTER_NAME (regno), err);
|
|
warning (msg);
|
|
return;
|
|
}
|
|
regaddr += sizeof (int);
|
|
}
|
|
}
|
|
else
|
|
for (regno = 0; regno < NUM_REGS; regno++)
|
|
store_inferior_registers (regno);
|
|
}
|
|
|
|
/* PT_PROT is specific to the PA BSD kernel and isn't documented
|
|
anywhere (except here).
|
|
|
|
PT_PROT allows one to enable/disable the data memory break bit
|
|
for pages of memory in an inferior process. This bit is used
|
|
to cause "Data memory break traps" to occur when the appropriate
|
|
page is written to.
|
|
|
|
The arguments are as follows:
|
|
|
|
PT_PROT -- The ptrace action to perform.
|
|
|
|
INFERIOR_PID -- The pid of the process who's page table entries
|
|
will be modified.
|
|
|
|
PT_ARGS -- The *address* of a 3 word block of memory which has
|
|
additional information:
|
|
|
|
word 0 -- The start address to watch. This should be a page-aligned
|
|
address.
|
|
|
|
word 1 -- The ending address to watch. Again, this should be a
|
|
page aligned address.
|
|
|
|
word 2 -- Nonzero to enable the data memory break bit on the
|
|
given address range or zero to disable the data memory break
|
|
bit on the given address range.
|
|
|
|
This call may fail if the given addresses are not valid in the inferior
|
|
process. This most often happens when restarting a program which
|
|
has watchpoints inserted on heap or stack memory. */
|
|
|
|
#define PT_PROT 21
|
|
|
|
int
|
|
hppa_set_watchpoint (int addr, int len, int flag)
|
|
{
|
|
int pt_args[3];
|
|
pt_args[0] = addr;
|
|
pt_args[1] = addr + len;
|
|
pt_args[2] = flag;
|
|
|
|
/* Mask off the lower 12 bits since we want to work on a page basis. */
|
|
pt_args[0] >>= 12;
|
|
pt_args[1] >>= 12;
|
|
|
|
/* Rounding adjustments. */
|
|
pt_args[1] -= pt_args[0];
|
|
pt_args[1]++;
|
|
|
|
/* Put the lower 12 bits back as zero. */
|
|
pt_args[0] <<= 12;
|
|
pt_args[1] <<= 12;
|
|
|
|
/* Do it. */
|
|
return ptrace (PT_PROT, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) pt_args, 0);
|
|
}
|