old-cross-binutils/gdb/mips-linux-nat.c
Ulrich Weigand 3e8c568d4f 2007-06-18 Markus Deuling <deuling@de.ibm.com>
* gdbarch.sh (SP_REGNUM): Replace by gdbarch_sp_regnum.
	* v850-tdep.c (v850_unwind_sp): Likewise.
	* std-regs.c (value_of_builtin_frame_sp_reg): Likewise.
	* stack.c (frame_info): Likewise.
	* stabsread.c (define_symbol): Likewise.
	* sh-tdep.c (sh_push_dummy_call_fpu, sh_push_dummy_call_nofpu)
	(sh_dwarf2_frame_init_reg, sh_frame_cache, sh_frame_prev_register)
	(sh_unwind_sp): Likewise.
	* sh64-tdep.c (sh64_push_dummy_call, sh64_frame_cache)
	(sh64_frame_prev_register, sh64_unwind_sp): Likewise.
	* rs6000-tdep.c (rs6000_push_dummy_call, rs6000_unwind_dummy_id)
	(rs6000_frame_cache): Likewise.
	* rs6000-nat.c (store_register): Likewise.
	* remote-mips.c (mips_wait): Likewise.
	* procfs.c (procfs_fetch_registers, procfs_store_registers): Likewise.
	* ppc-sysv-tdep.c (ppc_sysv_abi_push_dummy_call)
	(ppc64_sysv_abi_push_dummy_call): Likewise.
	* ppcobsd-tdep.c (ppcobsd_sigtramp_frame_cache): Likewise.
	* ppcobsd-nat.c (ppcobsd_supply_pcb): Likewise.
	* ppcnbsd-tdep.c (ppcnbsd_sigtramp_cache_init): Likewise.
	* ppc-linux-tdep.c (ppc_linux_sigtramp_cache): Likewise.
	* m32r-rom.c (m32r_supply_register): Likewise.
	* frame.c (frame_sp_unwind): Likewise.
	* mips-tdep.c (mips_insn16_frame_cache)
	(mips_insn32_frame_cache): Likewise (comment).
	* m68klinux-nat.c (supply_gregset): Likewise.
	* m68k-tdep.c (m68k_get_longjmp_target): Likewise.
	* ia64-tdep.c (ia64_frame_prev_register): Likewise.
	* i386-tdep.c (i386_get_longjmp_target): Likewise.
	* dwarf2-frame.c (dwarf2_frame_default_init_reg): Likewise.
	* cris-tdep.c (cris_regnums, cris_sigcontext_addr)
	(cris_sigtramp_frame_unwind_cache, cris_push_dummy_call)
	(cris_scan_prologue, crisv32_scan_prologue, cris_unwind_sp)
	(cris_register_type, crisv32_register_type)
	(cris_dwarf2_frame_init_reg): Likewise.
	* arch-utils.c (legacy_virtual_frame_pointer): Likewise.
	* amd64-tdep.c (amd64_frame_prev_register): Likewise.
	* amd64-linux-tdep.c (amd64_linux_sigcontext_addr): Likewise.
	* libunwind-frame.c (libunwind_frame_cache): Likewise.

	* gdbarch.sh (PC_REGNUM): Replace by gdbarch_pc_regnum.
	* regcache.c (read_pc_pid, generic_target_write_pc): Likewise.
	* xtensa-tdep.c (xtensa_register_type, xtensa_supply_gregset)
	(xtensa_unwind_pc, xtensa_frame_cache, xtensa_frame_prev_register)
	(xtensa_extract_return_value, xtensa_store_return_value): Likewise.
	* v850-tdep.c (v850_unwind_pc): Likewise.
	* stack.c (frame_info): Likewise.
	* sh-tdep.c (sh_generic_show_regs, sh3_show_regs, sh2e_show_regs)
	(sh2a_show_regs, sh2a_nofpu_show_regs, sh3e_show_regs)
	(sh3_dsp_show_regs, sh4_show_regs, sh4_nofpu_show_regs)
	(sh_dwarf2_frame_init_reg, sh_frame_prev_register, sh_unwind_pc)
	(sh_dsp_show_regs): Likewise.
	* shnbsd-tdep.c (shnbsd_supply_gregset)
	(shnbsd_collect_gregset): Likewise.
	* shnbsd-nat.c (GETREGS_SUPPLIES): Likewise.
	* sh64-tdep.c (sh64_compact_reg_base_num, sh64_show_media_regs)
	(sh64_frame_prev_register, sh64_unwind_pc): Likewise.
	* rs6000-tdep.c (ppc_supply_gregset, ppc_collect_gregset)
	(6000_register_reggroup_p, rs6000_unwind_pc)
	(rs6000_frame_cache): Likewise.
	* rs6000-nat.c (regmap, rs6000_fetch_inferior_registers)
	(rs6000_store_inferior_registers): Likewise.
	* remote-mips.c (mips_wait, mips_load): Likewise.
	* procfs.c (procfs_fetch_registers, procfs_store_registers): Likewise.
	* ppcobsd-tdep.c (ppcobsd_sigtramp_frame_cache): Likewise.
	* ppcobsd-nat.c (ppcobsd_supply_pcb): Likewise.
	* ppcnbsd-tdep.c (ppcnbsd_sigtramp_cache_init): Likewise.
	* ppcnbsd-nat.c (getregs_supplies, ppcnbsd_supply_pcb): Likewise.
	* ppc-linux-tdep.c (ppc_linux_sigtramp_cache): Likewise.
	* ppc-linux-nat.c (ppc_register_u_addr, fetch_ppc_registers)
	(store_ppc_registers, fill_gregset): Likewise.
	* mips-tdep.c (mips_stub_frame_cache, mips_gdbarch_init): Likewise.
	* mipsnbsd-tdep.c (mipsnbsd_supply_reg, mipsnbsd_fill_reg): Likewise.
	* mipsnbsd-nat.c (getregs_supplies): Likewise.
	* m68k-tdep.c (m68k_register_type, m68k_unwind_pc): Likewise.
	* m68klinux-nat.c (supply_gregset): Likewise.
	* irix5-nat.c (fill_gregset): Likewise.
	* i386-tdep.c (i386_unwind_pc): Likewise.
	* i386-linux-nat.c (i386_linux_resume): Likewise.
	* frame.c (get_prev_frame_1): Likewise.
	* dwarf2-frame.c (dwarf2_frame_default_init_reg): Likewise.
	* dbug-rom.c (dbug_supply_register): Likewise.
	* cris-tdep.c (cris_sigtramp_frame_unwind_cache, cris_scan_prologue)
	(crisv32_scan_prologue, cris_unwind_pc, cris_register_size)
	(cris_register_type, crisv32_register_type, crisv32_register_name)
	(cris_dwarf2_frame_init_reg, find_step_target)
	(cris_software_single_step, cris_supply_gregset)
	(cris_regnums): Likewise.
	* alpha-linux-nat.c (alpha_linux_register_u_offset): Likewise.
	* aix-thread.c (special_register_p, supply_sprs64, supply_sprs32)
	(fill_sprs64, fill_sprs32, store_regs_user_thread): Likewise.
	* mips-linux-tdep.c (mips_linux_write_pc): Likewise.

	* gdbarch.sh (PS_REGNUM): Replace by gdbarch_ps_regnum.
	* dbug-rom.c (dbug_supply_register): Likewise.
	* xtensa-tdep.c (xtensa_supply_gregset, xtensa_frame_cache)
	(xtensa_frame_prev_register, xtensa_push_dummy_call): Likewise.
	* win32-nat.c (win32_resume): Likewise.
	* std-regs.c (value_of_builtin_frame_ps_reg)
	(value_of_builtin_frame_pc_reg): Likewise.
	* m68k-tdep.c (m68k_register_type): Likewise.
	* m68klinux-nat.c (supply_gregset): Likewise.

	* gdbarch.sh (FP0_REGNUM): Replace by gdbarch_fp0_regnum.
	* sh-tdep.c (sh_extract_return_value_fpu, sh_store_return_value_fpu)
	(sh2e_show_regs, sh2a_show_regs, sh3e_show_regs, sh4_show_regs)
	(sh_sh2a_register_type, sh_sh3e_register_type, sh_sh4_register_type)
	(fv_reg_base_num, dr_reg_base_num): Likewise.
	* sh64-tdep.c (sh64_fv_reg_base_num, sh64_dr_reg_base_num)
	(sh64_fpp_reg_base_num, sh64_compact_reg_base_num, sh64_push_dummy_call)
	(sh64_extract_return_value, sh64_store_return_value)
	(sh64_show_media_regs, sh64_show_compact_regs, sh64_register_type)
	(sh64_do_fp_register, sh64_media_print_registers_info): Likewise.
	* procfs.c (procfs_fetch_registers, procfs_store_registers)
	(invalidate_cache): Likewise.
	* ppc-linux-tdep.c (ppc_linux_sigtramp_cache): Likewise.
	* mipsnbsd-tdep.c (mipsnbsd_supply_fpreg)
	(mipsnbsd_fill_fpreg): Likewise.
	* mipsnbsd-nat.c (mipsnbsd_fetch_inferior_registers)
	(mipsnbsd_store_inferior_registers): Likewise.
	* mips-linux-tdep.c (mips_supply_fpregset, mips_fill_fpregset)
	(mips64_supply_fpregset, mips64_fill_fpregset): Likewise.
	* mips-linux-nat.c (mips64_linux_register_addr): Likewise.
	* m68k-tdep.c (m68k_register_type, m68k_convert_register_p): Likewise.
	* m68klinux-nat.c (getfpregs_supplies, supply_fpregset)
	(fill_fpregset): Likewise.
	* irix5-nat.c (supply_fpregset, fill_fpregset): Likewise.
	* i386-tdep.h (struct_return): Likewise (comment).
	* i386-nto-tdep.c (i386nto_register_area): Likewise.
	* go32-nat.c (fetch_register, go32_fetch_registers, store_register)
	(go32_store_registers): Likewise.
	* alpha-tdep.c (alpha_next_pc): Likewise.
	* alpha-linux-nat.c (alpha_linux_register_u_offset): Likewise.
	* alphabsd-nat.c (alphabsd_fetch_inferior_registers)
	(alphabsd_store_inferior_registers): Likewise.
	* core-regset.c (fetch_core_registers): Likewise.
	* i386v4-nat.c (supply_fpregset, fill_fpregset): Likewise.

	* gdbarch.c, gdbarch.h: Regenerate.
2007-06-18 17:45:26 +00:00

393 lines
12 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 "regcache.h"
#include "linux-nat.h"
#include "mips-linux-tdep.h"
#include "target-descriptions.h"
#include "xml-support.h"
#include "gdb_proc_service.h"
#include "gregset.h"
#include <sgidefs.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) (struct regcache *, int);
void (*super_store_registers) (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 (current_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 (current_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 (current_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 (current_gdbarch) == 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 (current_gdbarch) == 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 (current_gdbarch) == 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 (current_gdbarch) == 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)
{
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) &regs) == -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 *) &regs);
}
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)
{
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) &regs) == -1)
perror_with_name (_("Couldn't get registers"));
mips64_fill_gregset (regcache, &regs, regno);
if (ptrace (PTRACE_SETREGS, tid, 0L, (PTRACE_TYPE_ARG3) &regs) == -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 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 (regcache, regnum);
}
/* Store REGNO (or all registers if REGNO == -1) to the target
using any working method. */
static void
mips64_linux_store_registers (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 (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 LONGEST (*super_xfer_partial) (struct target_ops *, enum target_object,
const char *, gdb_byte *, const gdb_byte *,
ULONGEST, LONGEST);
static LONGEST
mips_linux_xfer_partial (struct target_ops *ops,
enum target_object object,
const char *annex,
gdb_byte *readbuf, const gdb_byte *writebuf,
ULONGEST offset, LONGEST len)
{
if (object == TARGET_OBJECT_AVAILABLE_FEATURES)
{
if (annex != NULL && strcmp (annex, "target.xml") == 0)
{
/* Report that target registers are a size we know for sure
that we can get from ptrace. */
if (_MIPS_SIM == _ABIO32)
annex = "mips-linux.xml";
else
annex = "mips64-linux.xml";
}
return xml_builtin_xfer_partial (annex, readbuf, writebuf, offset, len);
}
return super_xfer_partial (ops, object, annex, readbuf, writebuf,
offset, len);
}
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;
/* Override the default to_xfer_partial. */
super_xfer_partial = t->to_xfer_partial;
t->to_xfer_partial = mips_linux_xfer_partial;
linux_nat_add_target (t);
}