mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 04:31:49 +08:00
42a4f53d2b
This commit applies all changes made after running the gdb/copyright.py script. Note that one file was flagged by the script, due to an invalid copyright header (gdb/unittests/basic_string_view/element_access/char/empty.cc). As the file was copied from GCC's libstdc++-v3 testsuite, this commit leaves this file untouched for the time being; a patch to fix the header was sent to gcc-patches first. gdb/ChangeLog: Update copyright year range in all GDB files.
145 lines
4.2 KiB
C
145 lines
4.2 KiB
C
/* Generic GNU/Linux target using traditional ptrace register access.
|
|
|
|
Copyright (C) 1988-2019 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 "linux-nat-trad.h"
|
|
|
|
#include "nat/gdb_ptrace.h"
|
|
#include "inf-ptrace.h"
|
|
|
|
/* Fetch register REGNUM from the inferior. */
|
|
|
|
void
|
|
linux_nat_trad_target::fetch_register (struct regcache *regcache, int regnum)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
CORE_ADDR addr;
|
|
gdb_byte *buf;
|
|
size_t size;
|
|
pid_t pid;
|
|
int i;
|
|
|
|
/* This isn't really an address, but ptrace thinks of it as one. */
|
|
addr = register_u_offset (gdbarch, regnum, 0);
|
|
if (addr == (CORE_ADDR)-1
|
|
|| gdbarch_cannot_fetch_register (gdbarch, regnum))
|
|
{
|
|
regcache->raw_supply (regnum, NULL);
|
|
return;
|
|
}
|
|
|
|
pid = get_ptrace_pid (regcache->ptid ());
|
|
|
|
size = register_size (gdbarch, regnum);
|
|
buf = (gdb_byte *) alloca (size);
|
|
|
|
/* Read the register contents from the inferior a chunk at a time. */
|
|
for (i = 0; i < size; i += sizeof (PTRACE_TYPE_RET))
|
|
{
|
|
size_t chunk = std::min (sizeof (PTRACE_TYPE_RET), size - i);
|
|
PTRACE_TYPE_RET val;
|
|
|
|
errno = 0;
|
|
val = ptrace (PT_READ_U, pid, (PTRACE_TYPE_ARG3) (uintptr_t) addr, 0);
|
|
if (errno != 0)
|
|
error (_("Couldn't read register %s (#%d): %s."),
|
|
gdbarch_register_name (gdbarch, regnum),
|
|
regnum, safe_strerror (errno));
|
|
store_unsigned_integer (buf + i, chunk, byte_order, val);
|
|
|
|
addr += sizeof (PTRACE_TYPE_RET);
|
|
}
|
|
regcache->raw_supply (regnum, buf);
|
|
}
|
|
|
|
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
|
|
for all registers. */
|
|
|
|
void
|
|
linux_nat_trad_target::fetch_registers (struct regcache *regcache, int regnum)
|
|
{
|
|
if (regnum == -1)
|
|
for (regnum = 0;
|
|
regnum < gdbarch_num_regs (regcache->arch ());
|
|
regnum++)
|
|
fetch_register (regcache, regnum);
|
|
else
|
|
fetch_register (regcache, regnum);
|
|
}
|
|
|
|
/* Store register REGNUM into the inferior. */
|
|
|
|
void
|
|
linux_nat_trad_target::store_register (const struct regcache *regcache,
|
|
int regnum)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
CORE_ADDR addr;
|
|
size_t size;
|
|
gdb_byte *buf;
|
|
pid_t pid;
|
|
int i;
|
|
|
|
/* This isn't really an address, but ptrace thinks of it as one. */
|
|
addr = register_u_offset (gdbarch, regnum, 1);
|
|
if (addr == (CORE_ADDR)-1
|
|
|| gdbarch_cannot_store_register (gdbarch, regnum))
|
|
return;
|
|
|
|
pid = get_ptrace_pid (regcache->ptid ());
|
|
|
|
size = register_size (gdbarch, regnum);
|
|
buf = (gdb_byte *) alloca (size);
|
|
|
|
/* Write the register contents into the inferior a chunk at a time. */
|
|
regcache->raw_collect (regnum, buf);
|
|
for (i = 0; i < size; i += sizeof (PTRACE_TYPE_RET))
|
|
{
|
|
size_t chunk = std::min (sizeof (PTRACE_TYPE_RET), size - i);
|
|
PTRACE_TYPE_RET val;
|
|
|
|
val = extract_unsigned_integer (buf + i, chunk, byte_order);
|
|
errno = 0;
|
|
ptrace (PT_WRITE_U, pid, (PTRACE_TYPE_ARG3) (uintptr_t) addr, val);
|
|
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);
|
|
}
|
|
}
|
|
|
|
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
|
|
this for all registers. */
|
|
|
|
void
|
|
linux_nat_trad_target::store_registers (struct regcache *regcache, int regnum)
|
|
{
|
|
if (regnum == -1)
|
|
for (regnum = 0;
|
|
regnum < gdbarch_num_regs (regcache->arch ());
|
|
regnum++)
|
|
store_register (regcache, regnum);
|
|
else
|
|
store_register (regcache, regnum);
|
|
}
|