/* 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 Free Software Foundation, Inc.
+ 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 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 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.
+ 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. */
+ 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.
/* 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, inferior_pid, \
+ 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 (regno)
- int regno;
+fetch_register (int regno)
{
register unsigned int regaddr;
- char buf[MAX_REGISTER_RAW_SIZE];
+ char buf[MAX_REGISTER_SIZE];
register int i;
/* Offset of registers within the u area. */
for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
{
errno = 0;
- *(int *) &buf[i] = ptrace (PT_RUREGS, inferior_pid,
+ *(int *) &buf[i] = ptrace (PT_RUREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) regaddr, 0);
regaddr += sizeof (int);
if (errno != 0)
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", reg_names[regno], err);
+ sprintf (msg, "reading register %s: %s", REGISTER_NAME (regno), err);
warning (msg);
goto error_exit;
}
}
supply_register (regno, buf);
- error_exit:;
+error_exit:;
}
/* Fetch all registers, or just one, from the child process. */
void
-fetch_inferior_registers (regno)
- int regno;
+fetch_inferior_registers (int regno)
{
if (regno == -1)
for (regno = 0; regno < NUM_REGS; regno++)
Otherwise, REGNO specifies which register (so we can save time). */
void
-store_inferior_registers (regno)
- int regno;
+store_inferior_registers (int regno)
{
register unsigned int regaddr;
- extern char registers[];
+ 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);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(int))
+ errno = 0;
+ if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM)
{
- errno = 0;
- ptrace (PT_WUREGS, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
- *(int *) ®isters[REGISTER_BYTE (regno) + i]);
+ scratch = *(int *) &deprecated_registers[REGISTER_BYTE (regno)] | 0x3;
+ ptrace (PT_WUREGS, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) regaddr,
+ scratch);
if (errno != 0)
{
- char *err = safe_strerror (errno);
- char *msg = alloca (strlen (err) + 128);
- sprintf (msg, "writing register %s: %s", reg_names[regno], err);
- warning (msg);
+ /* Error, even if attached. Failing to write these two
+ registers is pretty serious. */
+ sprintf (buf, "writing register number %d", regno);
+ perror_with_name (buf);
}
- regaddr += sizeof(int);
}
+ 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++)
- {
- if (CANNOT_STORE_REGISTER (regno))
- continue;
- store_inferior_registers (regno);
- }
- }
- return;
+ 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);
+}
projects / deliverable / binutils-gdb.git / blobdiff