mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-25 02:53:48 +08:00
270 lines
7.4 KiB
C
270 lines
7.4 KiB
C
/* Native-dependent code for PA-RISC HP-UX.
|
||
|
||
Copyright (C) 2004, 2005, 2007, 2008, 2009, 2010
|
||
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 3 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, see <http://www.gnu.org/licenses/>. */
|
||
|
||
#include "defs.h"
|
||
#include "inferior.h"
|
||
#include "regcache.h"
|
||
#include "target.h"
|
||
|
||
#include "gdb_assert.h"
|
||
#include <sys/ptrace.h>
|
||
#include <machine/save_state.h>
|
||
|
||
#ifdef HAVE_TTRACE
|
||
#include <sys/ttrace.h>
|
||
#endif
|
||
|
||
#include "hppa-tdep.h"
|
||
#include "inf-ptrace.h"
|
||
#include "inf-ttrace.h"
|
||
|
||
/* Non-zero if we should pretend not to be a runnable target. */
|
||
int child_suppress_run = 0;
|
||
|
||
/* Return the offset of register REGNUM within `struct save_state'.
|
||
The offset returns depends on the flags in the "flags" register and
|
||
the register size (32-bit or 64-bit). These are taken from
|
||
REGCACHE. */
|
||
|
||
LONGEST
|
||
hppa_hpux_save_state_offset (struct regcache *regcache, int regnum)
|
||
{
|
||
LONGEST offset;
|
||
|
||
if (regnum == HPPA_FLAGS_REGNUM)
|
||
return ssoff (ss_flags);
|
||
|
||
if (HPPA_R0_REGNUM < regnum && regnum < HPPA_FP0_REGNUM)
|
||
{
|
||
struct gdbarch *arch = get_regcache_arch (regcache);
|
||
size_t size = register_size (arch, HPPA_R1_REGNUM);
|
||
ULONGEST flags;
|
||
|
||
gdb_assert (size == 4 || size == 8);
|
||
|
||
regcache_cooked_read_unsigned (regcache, HPPA_FLAGS_REGNUM, &flags);
|
||
if (flags & SS_WIDEREGS)
|
||
offset = ssoff (ss_wide) + (8 - size) + (regnum - HPPA_R0_REGNUM) * 8;
|
||
else
|
||
offset = ssoff (ss_narrow) + (regnum - HPPA_R1_REGNUM) * 4;
|
||
}
|
||
else
|
||
{
|
||
struct gdbarch *arch = get_regcache_arch (regcache);
|
||
size_t size = register_size (arch, HPPA_FP0_REGNUM);
|
||
|
||
gdb_assert (size == 4 || size == 8);
|
||
gdb_assert (regnum >= HPPA_FP0_REGNUM);
|
||
offset = ssoff(ss_fpblock) + (regnum - HPPA_FP0_REGNUM) * size;
|
||
}
|
||
|
||
gdb_assert (offset < sizeof (save_state_t));
|
||
return offset;
|
||
}
|
||
|
||
/* Just in case a future version of PA-RISC HP-UX won't have ptrace(2)
|
||
at all. */
|
||
#ifndef PTRACE_TYPE_RET
|
||
#define PTRACE_TYPE_RET void
|
||
#endif
|
||
|
||
static void
|
||
hppa_hpux_fetch_register (struct regcache *regcache, int regnum)
|
||
{
|
||
struct gdbarch *gdbarch = get_regcache_arch (regcache);
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
CORE_ADDR addr;
|
||
size_t size;
|
||
PTRACE_TYPE_RET *buf;
|
||
pid_t pid;
|
||
int i;
|
||
|
||
pid = ptid_get_pid (inferior_ptid);
|
||
|
||
/* This isn't really an address, but ptrace thinks of it as one. */
|
||
addr = hppa_hpux_save_state_offset (regcache, regnum);
|
||
size = register_size (gdbarch, regnum);
|
||
|
||
gdb_assert (size == 4 || size == 8);
|
||
buf = alloca (size);
|
||
|
||
#ifdef HAVE_TTRACE
|
||
{
|
||
lwpid_t lwp = ptid_get_lwp (inferior_ptid);
|
||
|
||
if (ttrace (TT_LWP_RUREGS, pid, lwp, addr, size, (uintptr_t)buf) == -1)
|
||
error (_("Couldn't read register %s (#%d): %s"),
|
||
gdbarch_register_name (gdbarch, regnum),
|
||
regnum, safe_strerror (errno));
|
||
}
|
||
#else
|
||
{
|
||
int i;
|
||
|
||
/* Read the register contents from the inferior a chuck at the time. */
|
||
for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
|
||
{
|
||
errno = 0;
|
||
buf[i] = ptrace (PT_RUREGS, pid, (PTRACE_TYPE_ARG3) addr, 0, 0);
|
||
if (errno != 0)
|
||
error (_("Couldn't read register %s (#%d): %s"),
|
||
gdbarch_register_name (gdbarch, regnum),
|
||
regnum, safe_strerror (errno));
|
||
|
||
addr += sizeof (PTRACE_TYPE_RET);
|
||
}
|
||
}
|
||
#endif
|
||
|
||
/* Take care with the "flags" register. It's stored as an `int' in
|
||
`struct save_state', even for 64-bit code. */
|
||
if (regnum == HPPA_FLAGS_REGNUM && size == 8)
|
||
{
|
||
ULONGEST flags;
|
||
flags = extract_unsigned_integer ((gdb_byte *)buf, 4, byte_order);
|
||
store_unsigned_integer ((gdb_byte *)buf, 8, byte_order, flags);
|
||
}
|
||
|
||
regcache_raw_supply (regcache, regnum, buf);
|
||
}
|
||
|
||
static void
|
||
hppa_hpux_fetch_inferior_registers (struct target_ops *ops,
|
||
struct regcache *regcache, int regnum)
|
||
{
|
||
if (regnum == -1)
|
||
for (regnum = 0;
|
||
regnum < gdbarch_num_regs (get_regcache_arch (regcache));
|
||
regnum++)
|
||
hppa_hpux_fetch_register (regcache, regnum);
|
||
else
|
||
hppa_hpux_fetch_register (regcache, regnum);
|
||
}
|
||
|
||
/* Store register REGNUM into the inferior. */
|
||
|
||
static void
|
||
hppa_hpux_store_register (struct regcache *regcache, int regnum)
|
||
{
|
||
struct gdbarch *gdbarch = get_regcache_arch (regcache);
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
CORE_ADDR addr;
|
||
size_t size;
|
||
PTRACE_TYPE_RET *buf;
|
||
pid_t pid;
|
||
|
||
pid = ptid_get_pid (inferior_ptid);
|
||
|
||
/* This isn't really an address, but ptrace thinks of it as one. */
|
||
addr = hppa_hpux_save_state_offset (regcache, regnum);
|
||
size = register_size (gdbarch, regnum);
|
||
|
||
gdb_assert (size == 4 || size == 8);
|
||
buf = alloca (size);
|
||
|
||
regcache_raw_collect (regcache, regnum, buf);
|
||
|
||
/* Take care with the "flags" register. It's stored as an `int' in
|
||
`struct save_state', even for 64-bit code. */
|
||
if (regnum == HPPA_FLAGS_REGNUM && size == 8)
|
||
{
|
||
ULONGEST flags;
|
||
flags = extract_unsigned_integer ((gdb_byte *)buf, 8, byte_order);
|
||
store_unsigned_integer ((gdb_byte *)buf, 4, byte_order, flags);
|
||
size = 4;
|
||
}
|
||
|
||
#ifdef HAVE_TTRACE
|
||
{
|
||
lwpid_t lwp = ptid_get_lwp (inferior_ptid);
|
||
|
||
if (ttrace (TT_LWP_WUREGS, pid, lwp, addr, size, (uintptr_t)buf) == -1)
|
||
error (_("Couldn't write register %s (#%d): %s"),
|
||
gdbarch_register_name (gdbarch, regnum),
|
||
regnum, safe_strerror (errno));
|
||
}
|
||
#else
|
||
{
|
||
int i;
|
||
|
||
/* Write the register contents into the inferior a chunk at the time. */
|
||
for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
|
||
{
|
||
errno = 0;
|
||
ptrace (PT_WUREGS, pid, (PTRACE_TYPE_ARG3) addr, buf[i], 0);
|
||
if (errno != 0)
|
||
error (_("Couldn't write register %s (#%d): %s"),
|
||
gdbarch_register_name (gdbarch, regnum),
|
||
regnum, safe_strerror (errno));
|
||
|
||
addr += sizeof (PTRACE_TYPE_RET);
|
||
}
|
||
}
|
||
#endif
|
||
}
|
||
|
||
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
|
||
this for all registers (including the floating point registers). */
|
||
|
||
static void
|
||
hppa_hpux_store_inferior_registers (struct target_ops *ops,
|
||
struct regcache *regcache, int regnum)
|
||
{
|
||
if (regnum == -1)
|
||
for (regnum = 0;
|
||
regnum < gdbarch_num_regs (get_regcache_arch (regcache));
|
||
regnum++)
|
||
hppa_hpux_store_register (regcache, regnum);
|
||
else
|
||
hppa_hpux_store_register (regcache, regnum);
|
||
}
|
||
|
||
static int
|
||
hppa_hpux_child_can_run (void)
|
||
{
|
||
/* This variable is controlled by modules that layer their own
|
||
process structure atop that provided here. The code in
|
||
hpux-thread.c does this to support the HP-UX user-mode DCE
|
||
threads. */
|
||
return !child_suppress_run;
|
||
}
|
||
|
||
|
||
/* Prevent warning from -Wmissing-prototypes. */
|
||
void _initialize_hppa_hpux_nat (void);
|
||
|
||
void
|
||
_initialize_hppa_hpux_nat (void)
|
||
{
|
||
struct target_ops *t;
|
||
|
||
#ifdef HAVE_TTRACE
|
||
t = inf_ttrace_target ();
|
||
#else
|
||
t = inf_ptrace_target ();
|
||
#endif
|
||
|
||
t->to_fetch_registers = hppa_hpux_fetch_inferior_registers;
|
||
t->to_store_registers = hppa_hpux_store_inferior_registers;
|
||
t->to_can_run = hppa_hpux_child_can_run;
|
||
|
||
add_target (t);
|
||
}
|