/* Native-dependent code for GNU/Linux on MIPS processors.
- Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
Free Software Foundation, Inc.
This file is part of GDB.
#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
/* 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);
+void (*super_fetch_registers) (struct regcache *, int);
+void (*super_store_registers) (struct regcache *, 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(). */
+/* Map gdb internal register number to ptrace ``address''.
+ These ``addresses'' are normally defined in <asm/ptrace.h>.
-int
-mips_linux_cannot_fetch_register (int regno)
+ 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)
- 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;
+ 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
- return 1;
+ regaddr = (CORE_ADDR) -1;
+
+ return regaddr;
}
-int
-mips_linux_cannot_store_register (int regno)
+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)
- 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;
+ regaddr = regno;
+ else if ((regno >= mips_regnum (gdbarch)->fp0)
+ && (regno < mips_regnum (gdbarch)->fp0 + 32))
+ regaddr = MIPS64_FPR_BASE + (regno - FP0_REGNUM);
+ 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
- return 1;
+ regaddr = (CORE_ADDR) -1;
+
+ return regaddr;
}
/* Fetch the thread-local storage pointer for libthread_db. */
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 (int regno)
+mips64_linux_regsets_fetch_registers (struct regcache *regcache, int regno)
{
int is_fp;
int tid;
perror_with_name (_("Couldn't get registers"));
}
- mips64_supply_gregset (®s);
+ mips64_supply_gregset (regcache,
+ (const mips64_elf_gregset_t *) ®s);
}
if (regno == -1 || is_fp)
perror_with_name (_("Couldn't get FP registers"));
}
- mips64_supply_fpregset (&fp_regs);
+ mips64_supply_fpregset (regcache,
+ (const mips64_elf_fpregset_t *) &fp_regs);
}
}
using PTRACE_SETREGS et al. */
static void
-mips64_linux_regsets_store_registers (int regno)
+mips64_linux_regsets_store_registers (const struct regcache *regcache, int regno)
{
int is_fp;
int tid;
if (ptrace (PTRACE_GETREGS, tid, 0L, (PTRACE_TYPE_ARG3) ®s) == -1)
perror_with_name (_("Couldn't get registers"));
- mips64_fill_gregset (®s, regno);
+ mips64_fill_gregset (regcache, ®s, regno);
if (ptrace (PTRACE_SETREGS, tid, 0L, (PTRACE_TYPE_ARG3) ®s) == -1)
perror_with_name (_("Couldn't set registers"));
(PTRACE_TYPE_ARG3) &fp_regs) == -1)
perror_with_name (_("Couldn't get FP registers"));
- mips64_fill_fpregset (&fp_regs, regno);
+ mips64_fill_fpregset (regcache, &fp_regs, regno);
if (ptrace (PTRACE_SETFPREGS, tid, 0L,
(PTRACE_TYPE_ARG3) &fp_regs) == -1)
using any working method. */
static void
-mips64_linux_fetch_registers (int regnum)
+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 (regnum);
+ 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 (regnum);
+ 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 (int regnum)
+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 (regnum);
+ 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 (regnum);
+ 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_target ();
+ 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);
}
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