mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-30 13:33:53 +08:00
3e00823eb4
* m68k-tdep.c: Remove code within #ifdef USE_PROC_FS. * mips-linux-nat.c: Include "gregset.h". (supply_gregset, fill_gregset, supply_fpregset, fill_fpregset): Move from mips-linux-tdep.c. Change parameter type to gdb_gregset_t. * mips-linux-tdep.c (supply_gregset, fill_gregset, supply_fpregset, fill_fpregset): Move to mips-linux-nat.c. * Makefile.in (m68k-tdep.o, mips-linux-nat.o): Update dependencies.
385 lines
11 KiB
C
385 lines
11 KiB
C
/* Native-dependent code for GNU/Linux on MIPS processors.
|
|
|
|
Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
|
|
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 "gregset.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;
|
|
}
|
|
|
|
/* Map gdb internal register number to ptrace ``address''.
|
|
These ``addresses'' are normally defined in <asm/ptrace.h>. */
|
|
|
|
static CORE_ADDR
|
|
mips_linux_register_addr (int regno)
|
|
{
|
|
int regaddr;
|
|
|
|
if (regno < 0 || regno >= NUM_REGS)
|
|
error (_("Bogon register number %d."), regno);
|
|
|
|
if (regno < 32)
|
|
regaddr = regno;
|
|
else if ((regno >= mips_regnum (current_gdbarch)->fp0)
|
|
&& (regno < mips_regnum (current_gdbarch)->fp0 + 32))
|
|
regaddr = FPR_BASE + (regno - mips_regnum (current_gdbarch)->fp0);
|
|
else if (regno == mips_regnum (current_gdbarch)->pc)
|
|
regaddr = PC;
|
|
else if (regno == mips_regnum (current_gdbarch)->cause)
|
|
regaddr = CAUSE;
|
|
else if (regno == mips_regnum (current_gdbarch)->badvaddr)
|
|
regaddr = BADVADDR;
|
|
else if (regno == mips_regnum (current_gdbarch)->lo)
|
|
regaddr = MMLO;
|
|
else if (regno == mips_regnum (current_gdbarch)->hi)
|
|
regaddr = MMHI;
|
|
else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
|
|
regaddr = FPC_CSR;
|
|
else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
|
|
regaddr = FPC_EIR;
|
|
else
|
|
error (_("Unknowable register number %d."), regno);
|
|
|
|
return regaddr;
|
|
}
|
|
|
|
static CORE_ADDR
|
|
mips64_linux_register_addr (int regno)
|
|
{
|
|
int regaddr;
|
|
|
|
if (regno < 0 || regno >= NUM_REGS)
|
|
error (_("Bogon register number %d."), regno);
|
|
|
|
if (regno < 32)
|
|
regaddr = regno;
|
|
else if ((regno >= mips_regnum (current_gdbarch)->fp0)
|
|
&& (regno < mips_regnum (current_gdbarch)->fp0 + 32))
|
|
regaddr = MIPS64_FPR_BASE + (regno - FP0_REGNUM);
|
|
else if (regno == mips_regnum (current_gdbarch)->pc)
|
|
regaddr = MIPS64_PC;
|
|
else if (regno == mips_regnum (current_gdbarch)->cause)
|
|
regaddr = MIPS64_CAUSE;
|
|
else if (regno == mips_regnum (current_gdbarch)->badvaddr)
|
|
regaddr = MIPS64_BADVADDR;
|
|
else if (regno == mips_regnum (current_gdbarch)->lo)
|
|
regaddr = MIPS64_MMLO;
|
|
else if (regno == mips_regnum (current_gdbarch)->hi)
|
|
regaddr = MIPS64_MMHI;
|
|
else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
|
|
regaddr = MIPS64_FPC_CSR;
|
|
else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
|
|
regaddr = MIPS64_FPC_EIR;
|
|
else
|
|
error (_("Unknowable register number %d."), regno);
|
|
|
|
return regaddr;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* Wrapper functions. These are only used by libthread_db. */
|
|
|
|
void
|
|
supply_gregset (gdb_gregset_t *gregsetp)
|
|
{
|
|
if (mips_isa_regsize (current_gdbarch) == 4)
|
|
mips_supply_gregset ((void *) gregsetp);
|
|
else
|
|
mips64_supply_gregset ((void *) gregsetp);
|
|
}
|
|
|
|
void
|
|
fill_gregset (gdb_gregset_t *gregsetp, int regno)
|
|
{
|
|
if (mips_isa_regsize (current_gdbarch) == 4)
|
|
mips_fill_gregset ((void *) gregsetp, regno);
|
|
else
|
|
mips64_fill_gregset ((void *) gregsetp, regno);
|
|
}
|
|
|
|
void
|
|
supply_fpregset (gdb_fpregset_t *fpregsetp)
|
|
{
|
|
if (mips_isa_regsize (current_gdbarch) == 4)
|
|
mips_supply_fpregset ((void *) fpregsetp);
|
|
else
|
|
mips64_supply_fpregset ((void *) fpregsetp);
|
|
}
|
|
|
|
void
|
|
fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
|
|
{
|
|
if (mips_isa_regsize (current_gdbarch) == 4)
|
|
mips_fill_fpregset ((void *) fpregsetp, regno);
|
|
else
|
|
mips64_fill_fpregset ((void *) fpregsetp, regno);
|
|
}
|
|
|
|
|
|
/* 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);
|
|
}
|
|
|
|
/* Return the address in the core dump or inferior of register
|
|
REGNO. */
|
|
|
|
static CORE_ADDR
|
|
mips_linux_register_u_offset (int regno)
|
|
{
|
|
if (mips_abi_regsize (current_gdbarch) == 8)
|
|
return mips64_linux_register_addr (regno);
|
|
else
|
|
return mips_linux_register_addr (regno);
|
|
}
|
|
|
|
void _initialize_mips_linux_nat (void);
|
|
|
|
void
|
|
_initialize_mips_linux_nat (void)
|
|
{
|
|
struct target_ops *t = linux_trad_target (mips_linux_register_u_offset);
|
|
|
|
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);
|
|
}
|