X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fmips-linux-nat.c;h=2db2969c5fee7190d1257e43cab1c448b8850550;hb=2bd7c093f663139ad9e57ddc748ade12f6bfbe01;hp=197f7e92a5b8536b76af43605a688c5ab16046a8;hpb=56cea623828ea5eea0cc592f7f55157b4b902bb4;p=deliverable%2Fbinutils-gdb.git
diff --git a/gdb/mips-linux-nat.c b/gdb/mips-linux-nat.c
index 197f7e92a5..2db2969c5f 100644
--- a/gdb/mips-linux-nat.c
+++ b/gdb/mips-linux-nat.c
@@ -1,12 +1,13 @@
/* Native-dependent code for GNU/Linux on MIPS processors.
- Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
+ 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 2 of the License, or
+ 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,
@@ -15,49 +16,365 @@
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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see . */
#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"
-/* Pseudo registers can not be read. ptrace does not provide a way to
- read (or set) PS_REGNUM, and there's no point in reading or setting
- ZERO_REGNUM. We also can not set BADVADDR, CAUSE, or FCRIR via
- ptrace(). */
-
-int
-mips_linux_cannot_fetch_register (int regno)
-{
- if (regno > ZERO_REGNUM && regno < 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 > ZERO_REGNUM && regno < 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;
+#include "gdb_proc_service.h"
+#include "gregset.h"
+
+#include
+#include
+
+#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 .
+
+ 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 ();
}