mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-27 03:51:15 +08:00
a0740d21fa
call to super_fetch_registers. (mips64_linux_store_registers): Pass `ops' to call to super_store_registers.
381 lines
11 KiB
C
381 lines
11 KiB
C
/* Native-dependent code for GNU/Linux on MIPS processors.
|
|
|
|
Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
|
|
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 "mips-tdep.h"
|
|
#include "target.h"
|
|
#include "regcache.h"
|
|
#include "linux-nat.h"
|
|
#include "mips-linux-tdep.h"
|
|
#include "target-descriptions.h"
|
|
|
|
#include "gdb_proc_service.h"
|
|
#include "gregset.h"
|
|
|
|
#include <sgidefs.h>
|
|
#include <sys/ptrace.h>
|
|
|
|
#include "features/mips-linux.c"
|
|
#include "features/mips64-linux.c"
|
|
|
|
#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) (struct target_ops *, struct regcache *, int);
|
|
void (*super_store_registers) (struct target_ops *, struct regcache *, int);
|
|
|
|
/* Map gdb internal register number to ptrace ``address''.
|
|
These ``addresses'' are normally defined in <asm/ptrace.h>.
|
|
|
|
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(). */
|
|
|
|
static CORE_ADDR
|
|
mips_linux_register_addr (struct gdbarch *gdbarch, int regno, int store)
|
|
{
|
|
CORE_ADDR regaddr;
|
|
|
|
if (regno < 0 || regno >= gdbarch_num_regs (gdbarch))
|
|
error (_("Bogon register number %d."), regno);
|
|
|
|
if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
|
|
regaddr = regno;
|
|
else if ((regno >= mips_regnum (gdbarch)->fp0)
|
|
&& (regno < mips_regnum (gdbarch)->fp0 + 32))
|
|
regaddr = FPR_BASE + (regno - mips_regnum (gdbarch)->fp0);
|
|
else if (regno == mips_regnum (gdbarch)->pc)
|
|
regaddr = PC;
|
|
else if (regno == mips_regnum (gdbarch)->cause)
|
|
regaddr = store? (CORE_ADDR) -1 : CAUSE;
|
|
else if (regno == mips_regnum (gdbarch)->badvaddr)
|
|
regaddr = store? (CORE_ADDR) -1 : BADVADDR;
|
|
else if (regno == mips_regnum (gdbarch)->lo)
|
|
regaddr = MMLO;
|
|
else if (regno == mips_regnum (gdbarch)->hi)
|
|
regaddr = MMHI;
|
|
else if (regno == mips_regnum (gdbarch)->fp_control_status)
|
|
regaddr = FPC_CSR;
|
|
else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
|
|
regaddr = store? (CORE_ADDR) -1 : FPC_EIR;
|
|
else if (mips_linux_restart_reg_p (gdbarch) && regno == MIPS_RESTART_REGNUM)
|
|
regaddr = 0;
|
|
else
|
|
regaddr = (CORE_ADDR) -1;
|
|
|
|
return regaddr;
|
|
}
|
|
|
|
static CORE_ADDR
|
|
mips64_linux_register_addr (struct gdbarch *gdbarch, int regno, int store)
|
|
{
|
|
CORE_ADDR regaddr;
|
|
|
|
if (regno < 0 || regno >= gdbarch_num_regs (gdbarch))
|
|
error (_("Bogon register number %d."), regno);
|
|
|
|
if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
|
|
regaddr = regno;
|
|
else if ((regno >= mips_regnum (gdbarch)->fp0)
|
|
&& (regno < mips_regnum (gdbarch)->fp0 + 32))
|
|
regaddr = MIPS64_FPR_BASE + (regno - gdbarch_fp0_regnum (gdbarch));
|
|
else if (regno == mips_regnum (gdbarch)->pc)
|
|
regaddr = MIPS64_PC;
|
|
else if (regno == mips_regnum (gdbarch)->cause)
|
|
regaddr = store? (CORE_ADDR) -1 : MIPS64_CAUSE;
|
|
else if (regno == mips_regnum (gdbarch)->badvaddr)
|
|
regaddr = store? (CORE_ADDR) -1 : MIPS64_BADVADDR;
|
|
else if (regno == mips_regnum (gdbarch)->lo)
|
|
regaddr = MIPS64_MMLO;
|
|
else if (regno == mips_regnum (gdbarch)->hi)
|
|
regaddr = MIPS64_MMHI;
|
|
else if (regno == mips_regnum (gdbarch)->fp_control_status)
|
|
regaddr = MIPS64_FPC_CSR;
|
|
else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
|
|
regaddr = store? (CORE_ADDR) -1 : MIPS64_FPC_EIR;
|
|
else if (mips_linux_restart_reg_p (gdbarch) && regno == MIPS_RESTART_REGNUM)
|
|
regaddr = 0;
|
|
else
|
|
regaddr = (CORE_ADDR) -1;
|
|
|
|
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 (struct regcache *regcache, const gdb_gregset_t *gregsetp)
|
|
{
|
|
if (mips_isa_regsize (get_regcache_arch (regcache)) == 4)
|
|
mips_supply_gregset (regcache, (const mips_elf_gregset_t *) gregsetp);
|
|
else
|
|
mips64_supply_gregset (regcache, (const mips64_elf_gregset_t *) gregsetp);
|
|
}
|
|
|
|
void
|
|
fill_gregset (const struct regcache *regcache,
|
|
gdb_gregset_t *gregsetp, int regno)
|
|
{
|
|
if (mips_isa_regsize (get_regcache_arch (regcache)) == 4)
|
|
mips_fill_gregset (regcache, (mips_elf_gregset_t *) gregsetp, regno);
|
|
else
|
|
mips64_fill_gregset (regcache, (mips64_elf_gregset_t *) gregsetp, regno);
|
|
}
|
|
|
|
void
|
|
supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp)
|
|
{
|
|
if (mips_isa_regsize (get_regcache_arch (regcache)) == 4)
|
|
mips_supply_fpregset (regcache, (const mips_elf_fpregset_t *) fpregsetp);
|
|
else
|
|
mips64_supply_fpregset (regcache, (const mips64_elf_fpregset_t *) fpregsetp);
|
|
}
|
|
|
|
void
|
|
fill_fpregset (const struct regcache *regcache,
|
|
gdb_fpregset_t *fpregsetp, int regno)
|
|
{
|
|
if (mips_isa_regsize (get_regcache_arch (regcache)) == 4)
|
|
mips_fill_fpregset (regcache, (mips_elf_fpregset_t *) fpregsetp, regno);
|
|
else
|
|
mips64_fill_fpregset (regcache, (mips64_elf_fpregset_t *) 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 (struct regcache *regcache, int regno)
|
|
{
|
|
struct gdbarch *gdbarch = get_regcache_arch (regcache);
|
|
int is_fp;
|
|
int tid;
|
|
|
|
if (regno >= mips_regnum (gdbarch)->fp0
|
|
&& regno <= mips_regnum (gdbarch)->fp0 + 32)
|
|
is_fp = 1;
|
|
else if (regno == mips_regnum (gdbarch)->fp_control_status)
|
|
is_fp = 1;
|
|
else if (regno == mips_regnum (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 (regcache,
|
|
(const mips64_elf_gregset_t *) ®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 (regcache,
|
|
(const mips64_elf_fpregset_t *) &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 (const struct regcache *regcache, int regno)
|
|
{
|
|
struct gdbarch *gdbarch = get_regcache_arch (regcache);
|
|
int is_fp;
|
|
int tid;
|
|
|
|
if (regno >= mips_regnum (gdbarch)->fp0
|
|
&& regno <= mips_regnum (gdbarch)->fp0 + 32)
|
|
is_fp = 1;
|
|
else if (regno == mips_regnum (gdbarch)->fp_control_status)
|
|
is_fp = 1;
|
|
else if (regno == mips_regnum (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 (regcache, ®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 (regcache, &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 (struct target_ops *ops,
|
|
struct regcache *regcache, int regnum)
|
|
{
|
|
/* Unless we already know that PTRACE_GETREGS does not work, try it. */
|
|
if (have_ptrace_regsets)
|
|
mips64_linux_regsets_fetch_registers (regcache, 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 (ops, regcache, regnum);
|
|
}
|
|
|
|
/* Store REGNO (or all registers if REGNO == -1) to the target
|
|
using any working method. */
|
|
|
|
static void
|
|
mips64_linux_store_registers (struct target_ops *ops,
|
|
struct regcache *regcache, int regnum)
|
|
{
|
|
/* Unless we already know that PTRACE_GETREGS does not work, try it. */
|
|
if (have_ptrace_regsets)
|
|
mips64_linux_regsets_store_registers (regcache, 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 (ops, regcache, regnum);
|
|
}
|
|
|
|
/* Return the address in the core dump or inferior of register
|
|
REGNO. */
|
|
|
|
static CORE_ADDR
|
|
mips_linux_register_u_offset (struct gdbarch *gdbarch, int regno, int store_p)
|
|
{
|
|
if (mips_abi_regsize (gdbarch) == 8)
|
|
return mips64_linux_register_addr (gdbarch, regno, store_p);
|
|
else
|
|
return mips_linux_register_addr (gdbarch, regno, store_p);
|
|
}
|
|
|
|
static const struct target_desc *
|
|
mips_linux_read_description (struct target_ops *ops)
|
|
{
|
|
/* Report that target registers are a size we know for sure
|
|
that we can get from ptrace. */
|
|
if (_MIPS_SIM == _ABIO32)
|
|
return tdesc_mips_linux;
|
|
else
|
|
return tdesc_mips64_linux;
|
|
}
|
|
|
|
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;
|
|
|
|
t->to_read_description = mips_linux_read_description;
|
|
|
|
linux_nat_add_target (t);
|
|
|
|
/* Initialize the standard target descriptions. */
|
|
initialize_tdesc_mips_linux ();
|
|
initialize_tdesc_mips64_linux ();
|
|
}
|