f973ed9c9f
(super_mourn_inferior, kill_inferior, threaded, linux_nat_ops) (child_mourn_inferior, child_wait, linux_nat_create_inferior) (linux_nat_fetch_registers, linux_nat_store_registers) (linux_nat_child_post_startup_inferior, init_linux_nat_ops): Delete. (init_lwp_list): Don't set threaded. (add_lwp): Don't modify threaded. (delete_lwp): Don't mention non-threaded mode. (linux_nat_switch_fork): New. (linux_nat_attach): Update inferior_ptid. (linux_nat_wait): Handle num_lwps == 0 at entry. Don't check threaded flag. (linux_nat_kill): Handle pending forks and saved forks. (linux_nat_mourn_inferior): Handle saved forks. (linux_nat_pid_to_str): Don't use the LWP form when there is only one thread. (linux_target): Don't set to_wait, to_kill, or to_mourn_inferior. (linux_nat_add_target): New. (_initialize_linux_nat): Don't initialize the linux native target here. * linux-nat.h (linux_nat_add_target, linux_nat_switch_fork): New prototypes. * linux-fork.c: Include "linux-nat.h". (add_fork): Update initial PID. (fork_load_infrun_state): Call linux_nat_switch_fork. * Makefile.in (linux-fork.o): Update. * alpha-linux-nat.c (_initialize_alpha_linux_nat): Use linux_nat_add_target instead of add_target. * amd64-linux-nat.c (_initialize_amd64_linux_nat): Likewise. * arm-linux-nat.c (_initialize_arm_linux_nat): Likewise. * hppa-linux-nat.c (_initialize_hppa_linux_nat): Likewise. * ia64-linux-nat.c (_initialize_ia64_linux_nat): Likewise. * i386-linux-nat.c (_initialize_i386_linux_nat): Likewise. * m32r-linux-nat.c (_initialize_m32r_linux_nat): Likewise. * m68klinux-nat.c (_initialize_m68k_linux_nat): Likewise. * mips-linux-nat.c (_initialize_mips_linux_nat): Likewise. * ppc-linux-nat.c (_initialize_ppc_linux_nat): Likewise. * s390-nat.c (_initialize_s390_nat): Likewise. * sparc-linux-nat.c (_initialize_sparc_linux_nat): Likewise. * sparc64-linux-nat.c (_initialize_sparc64_linux_nat): Likewise.
264 lines
7.2 KiB
C
264 lines
7.2 KiB
C
/* Native-dependent code for GNU/Linux on MIPS processors.
|
|
|
|
Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
|
|
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., 51 Franklin Street, Fifth Floor,
|
|
Boston, MA 02110-1301, USA. */
|
|
|
|
#include "defs.h"
|
|
#include "inferior.h"
|
|
#include "mips-tdep.h"
|
|
#include "target.h"
|
|
#include "linux-nat.h"
|
|
#include "mips-linux-tdep.h"
|
|
|
|
#include "gdb_proc_service.h"
|
|
|
|
#include <sys/ptrace.h>
|
|
|
|
#ifndef PTRACE_GET_THREAD_AREA
|
|
#define PTRACE_GET_THREAD_AREA 25
|
|
#endif
|
|
|
|
/* Assume that we have PTRACE_GETREGS et al. support. If we do not,
|
|
we'll clear this and use PTRACE_PEEKUSER instead. */
|
|
static int have_ptrace_regsets = 1;
|
|
|
|
/* Saved function pointers to fetch and store a single register using
|
|
PTRACE_PEEKUSER and PTRACE_POKEUSER. */
|
|
|
|
void (*super_fetch_registers) (int);
|
|
void (*super_store_registers) (int);
|
|
|
|
/* Pseudo registers can not be read. ptrace does not provide a way to
|
|
read (or set) MIPS_PS_REGNUM, and there's no point in reading or
|
|
setting MIPS_ZERO_REGNUM. We also can not set BADVADDR, CAUSE, or
|
|
FCRIR via ptrace(). */
|
|
|
|
int
|
|
mips_linux_cannot_fetch_register (int regno)
|
|
{
|
|
if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
|
|
return 0;
|
|
else if (regno >= mips_regnum (current_gdbarch)->fp0
|
|
&& regno <= mips_regnum (current_gdbarch)->fp0 + 32)
|
|
return 0;
|
|
else if (regno == mips_regnum (current_gdbarch)->lo
|
|
|| regno == mips_regnum (current_gdbarch)->hi
|
|
|| regno == mips_regnum (current_gdbarch)->badvaddr
|
|
|| regno == mips_regnum (current_gdbarch)->cause
|
|
|| regno == mips_regnum (current_gdbarch)->pc
|
|
|| regno == mips_regnum (current_gdbarch)->fp_control_status
|
|
|| regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
|
|
return 0;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
mips_linux_cannot_store_register (int regno)
|
|
{
|
|
if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
|
|
return 0;
|
|
else if (regno >= FP0_REGNUM && regno <= FP0_REGNUM + 32)
|
|
return 0;
|
|
else if (regno == mips_regnum (current_gdbarch)->lo
|
|
|| regno == mips_regnum (current_gdbarch)->hi
|
|
|| regno == mips_regnum (current_gdbarch)->pc
|
|
|| regno == mips_regnum (current_gdbarch)->fp_control_status)
|
|
return 0;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
/* Fetch the thread-local storage pointer for libthread_db. */
|
|
|
|
ps_err_e
|
|
ps_get_thread_area (const struct ps_prochandle *ph,
|
|
lwpid_t lwpid, int idx, void **base)
|
|
{
|
|
if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
|
|
return PS_ERR;
|
|
|
|
/* IDX is the bias from the thread pointer to the beginning of the
|
|
thread descriptor. It has to be subtracted due to implementation
|
|
quirks in libthread_db. */
|
|
*base = (void *) ((char *)*base - idx);
|
|
|
|
return PS_OK;
|
|
}
|
|
|
|
/* Fetch REGNO (or all registers if REGNO == -1) from the target
|
|
using PTRACE_GETREGS et al. */
|
|
|
|
static void
|
|
mips64_linux_regsets_fetch_registers (int regno)
|
|
{
|
|
int is_fp;
|
|
int tid;
|
|
|
|
if (regno >= mips_regnum (current_gdbarch)->fp0
|
|
&& regno <= mips_regnum (current_gdbarch)->fp0 + 32)
|
|
is_fp = 1;
|
|
else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
|
|
is_fp = 1;
|
|
else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
|
|
is_fp = 1;
|
|
else
|
|
is_fp = 0;
|
|
|
|
tid = ptid_get_lwp (inferior_ptid);
|
|
if (tid == 0)
|
|
tid = ptid_get_pid (inferior_ptid);
|
|
|
|
if (regno == -1 || !is_fp)
|
|
{
|
|
mips64_elf_gregset_t regs;
|
|
|
|
if (ptrace (PTRACE_GETREGS, tid, 0L, (PTRACE_TYPE_ARG3) ®s) == -1)
|
|
{
|
|
if (errno == EIO)
|
|
{
|
|
have_ptrace_regsets = 0;
|
|
return;
|
|
}
|
|
perror_with_name (_("Couldn't get registers"));
|
|
}
|
|
|
|
mips64_supply_gregset (®s);
|
|
}
|
|
|
|
if (regno == -1 || is_fp)
|
|
{
|
|
mips64_elf_fpregset_t fp_regs;
|
|
|
|
if (ptrace (PTRACE_GETFPREGS, tid, 0L,
|
|
(PTRACE_TYPE_ARG3) &fp_regs) == -1)
|
|
{
|
|
if (errno == EIO)
|
|
{
|
|
have_ptrace_regsets = 0;
|
|
return;
|
|
}
|
|
perror_with_name (_("Couldn't get FP registers"));
|
|
}
|
|
|
|
mips64_supply_fpregset (&fp_regs);
|
|
}
|
|
}
|
|
|
|
/* Store REGNO (or all registers if REGNO == -1) to the target
|
|
using PTRACE_SETREGS et al. */
|
|
|
|
static void
|
|
mips64_linux_regsets_store_registers (int regno)
|
|
{
|
|
int is_fp;
|
|
int tid;
|
|
|
|
if (regno >= mips_regnum (current_gdbarch)->fp0
|
|
&& regno <= mips_regnum (current_gdbarch)->fp0 + 32)
|
|
is_fp = 1;
|
|
else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
|
|
is_fp = 1;
|
|
else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
|
|
is_fp = 1;
|
|
else
|
|
is_fp = 0;
|
|
|
|
tid = ptid_get_lwp (inferior_ptid);
|
|
if (tid == 0)
|
|
tid = ptid_get_pid (inferior_ptid);
|
|
|
|
if (regno == -1 || !is_fp)
|
|
{
|
|
mips64_elf_gregset_t regs;
|
|
|
|
if (ptrace (PTRACE_GETREGS, tid, 0L, (PTRACE_TYPE_ARG3) ®s) == -1)
|
|
perror_with_name (_("Couldn't get registers"));
|
|
|
|
mips64_fill_gregset (®s, regno);
|
|
|
|
if (ptrace (PTRACE_SETREGS, tid, 0L, (PTRACE_TYPE_ARG3) ®s) == -1)
|
|
perror_with_name (_("Couldn't set registers"));
|
|
}
|
|
|
|
if (regno == -1 || is_fp)
|
|
{
|
|
mips64_elf_fpregset_t fp_regs;
|
|
|
|
if (ptrace (PTRACE_GETFPREGS, tid, 0L,
|
|
(PTRACE_TYPE_ARG3) &fp_regs) == -1)
|
|
perror_with_name (_("Couldn't get FP registers"));
|
|
|
|
mips64_fill_fpregset (&fp_regs, regno);
|
|
|
|
if (ptrace (PTRACE_SETFPREGS, tid, 0L,
|
|
(PTRACE_TYPE_ARG3) &fp_regs) == -1)
|
|
perror_with_name (_("Couldn't set FP registers"));
|
|
}
|
|
}
|
|
|
|
/* Fetch REGNO (or all registers if REGNO == -1) from the target
|
|
using any working method. */
|
|
|
|
static void
|
|
mips64_linux_fetch_registers (int regnum)
|
|
{
|
|
/* Unless we already know that PTRACE_GETREGS does not work, try it. */
|
|
if (have_ptrace_regsets)
|
|
mips64_linux_regsets_fetch_registers (regnum);
|
|
|
|
/* If we know, or just found out, that PTRACE_GETREGS does not work, fall
|
|
back to PTRACE_PEEKUSER. */
|
|
if (!have_ptrace_regsets)
|
|
super_fetch_registers (regnum);
|
|
}
|
|
|
|
/* Store REGNO (or all registers if REGNO == -1) to the target
|
|
using any working method. */
|
|
|
|
static void
|
|
mips64_linux_store_registers (int regnum)
|
|
{
|
|
/* Unless we already know that PTRACE_GETREGS does not work, try it. */
|
|
if (have_ptrace_regsets)
|
|
mips64_linux_regsets_store_registers (regnum);
|
|
|
|
/* If we know, or just found out, that PTRACE_GETREGS does not work, fall
|
|
back to PTRACE_PEEKUSER. */
|
|
if (!have_ptrace_regsets)
|
|
super_store_registers (regnum);
|
|
}
|
|
|
|
void _initialize_mips_linux_nat (void);
|
|
|
|
void
|
|
_initialize_mips_linux_nat (void)
|
|
{
|
|
struct target_ops *t = linux_target ();
|
|
|
|
super_fetch_registers = t->to_fetch_registers;
|
|
super_store_registers = t->to_store_registers;
|
|
|
|
t->to_fetch_registers = mips64_linux_fetch_registers;
|
|
t->to_store_registers = mips64_linux_store_registers;
|
|
|
|
linux_nat_add_target (t);
|
|
}
|