This is the mail archive of the gdb-patches@sourceware.org mailing list for the GDB project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

[RFA] Darwin/x86 port (v5 - part 3/4: i386-darwin files)




i386-darwin-tdep.h:

/* Target-dependent code for Darwin x86.

Copyright (C) 2008 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/ >. */
#ifndef __I386_DARWIN_TDEP_H__
#define __I386_DARWIN_TDEP_H__


#include <mach/thread_status.h>

/* Mapping between the general-purpose registers in Darwin x86 thread_state
struct and GDB's register cache layout. */
extern int i386_darwin_thread_state_reg_offset[];
extern const int i386_darwin_thread_state_num_regs;


/* Mapping between the general-purpose registers in Darwin x86-64 thread
   state and GDB's register cache layout.
   Indexed by amd64_regnum.  */
extern int amd64_darwin_thread_state_reg_offset[];
extern const int amd64_darwin_thread_state_num_regs;

#endif /* __I386_DARWIN_TDEP_H__ */




i386-darwin-tdep.c:


/* Darwin support for GDB, the GNU debugger.
   Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2005, 2008
   Free Software Foundation, Inc.

Contributed by Apple Computer, 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 "frame.h"
#include "inferior.h"
#include "gdbcore.h"
#include "target.h"
#include "floatformat.h"
#include "symtab.h"
#include "regcache.h"
#include "libbfd.h"
#include "objfiles.h"

#include "i387-tdep.h"
#include "i386-tdep.h"
#include "amd64-tdep.h"
#include "osabi.h"
#include "ui-out.h"
#include "symtab.h"
#include "frame.h"
#include "gdb_assert.h"
#include "i386-darwin-tdep.h"

/* Offsets into the struct i386_thread_state where we'll find the saved regs. */
/* From <mach/i386/thread_status.h> and i386-tdep.h */
int i386_darwin_thread_state_reg_offset[] =
{
0 * 4, /* EAX */
2 * 4, /* ECX */
3 * 4, /* EDX */
1 * 4, /* EBX */
7 * 4, /* ESP */
6 * 4, /* EBP */
5 * 4, /* ESI */
4 * 4, /* EDI */
10 * 4, /* EIP */
9 * 4, /* EFLAGS */
11 * 4, /* CS */
8, /* SS */
12 * 4, /* DS */
13 * 4, /* ES */
14 * 4, /* FS */
15 * 4 /* GS */
};


const int i386_darwin_thread_state_num_regs =
  ARRAY_SIZE (i386_darwin_thread_state_reg_offset);

/* Offsets into the struct x86_thread_state64 where we'll find the saved regs. */
/* From <mach/i386/thread_status.h> and amd64-tdep.h */
int amd64_darwin_thread_state_reg_offset[] =
{
0 * 8, /* %rax */
1 * 8, /* %rbx */
2 * 8, /* %rcx */
3 * 8, /* %rdx */
5 * 8, /* %rsi */
4 * 8, /* %rdi */
6 * 8, /* %rbp */
7 * 8, /* %rsp */
8 * 8, /* %r8 ... */
9 * 8,
10 * 8,
11 * 8,
12 * 8,
13 * 8,
14 * 8,
15 * 8, /* ... %r15 */
16 * 8, /* %rip */
17 * 8, /* %rflags */
18 * 8, /* %cs */
-1, /* %ss */
-1, /* %ds */
-1, /* %es */
19 * 8, /* %fs */
20 * 8 /* %gs */
};


const int amd64_darwin_thread_state_num_regs =
  ARRAY_SIZE (amd64_darwin_thread_state_reg_offset);

static void
i386_darwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

  /* We support the SSE registers.  */
  tdep->num_xmm_regs = I386_NUM_XREGS - 1;
  set_gdbarch_num_regs (gdbarch, I386_SSE_NUM_REGS);

tdep->struct_return = reg_struct_return;

  tdep->sigcontext_addr = NULL;
  tdep->sc_reg_offset = i386_darwin_thread_state_reg_offset;
  tdep->sc_num_regs = 16;

  tdep->jb_pc_offset = 20;
}

static void
x86_darwin_init_abi_64 (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);


amd64_init_abi (info, gdbarch);

tdep->struct_return = reg_struct_return;

/* We don't do signals yet. */
tdep->sigcontext_addr = NULL;
tdep->sc_reg_offset = amd64_darwin_thread_state_reg_offset;
tdep->sc_num_regs = ARRAY_SIZE (amd64_darwin_thread_state_reg_offset);


  tdep->jb_pc_offset = 148;
}

static enum gdb_osabi
i386_mach_o_osabi_sniffer (bfd *abfd)
{
  if (!bfd_check_format (abfd, bfd_object))
    return GDB_OSABI_UNKNOWN;

  if (bfd_get_arch (abfd) == bfd_arch_i386)
    return GDB_OSABI_DARWIN;

  return GDB_OSABI_UNKNOWN;
}

void
_initialize_i386_darwin_tdep (void)
{
gdbarch_register_osabi_sniffer (bfd_arch_unknown, bfd_target_mach_o_flavour,
i386_mach_o_osabi_sniffer);


  gdbarch_register_osabi (bfd_arch_i386, bfd_mach_i386_i386,
			  GDB_OSABI_DARWIN, i386_darwin_init_abi);

  gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
                          GDB_OSABI_DARWIN, x86_darwin_init_abi_64);
}




i386-darwin-nat.c:


/* Darwin support for GDB, the GNU debugger.
   Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2008
   Free Software Foundation, Inc.

Contributed by Apple Computer, 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 "frame.h"
#include "inferior.h"
#include "target.h"
#include "symfile.h"
#include "symtab.h"
#include "objfiles.h"
#include "gdbcmd.h"
#include "regcache.h"
#include "gdb_assert.h"
#include "i386-tdep.h"
#include "amd64-nat.h"
#include "i387-tdep.h"
#include "gdbarch.h"
#include "arch-utils.h"

#include "darwin-nat.h"
#include "i386-darwin-tdep.h"

/* Read register values from the inferior process.
If REGNO is -1, do this for all registers.
Otherwise, REGNO specifies which register (so we can save time). */
static void
i386_darwin_fetch_inferior_registers (struct regcache *regcache, int regno)
{
thread_t current_thread = ptid_get_tid (inferior_ptid);
int fetched = 0;
struct gdbarch *gdbarch = get_regcache_arch (regcache);


if (gdbarch_ptr_bit (gdbarch) == 64)
{
if (regno == -1 || amd64_native_gregset_supplies_p (gdbarch, regno))
{
x86_thread_state_t gp_regs;
unsigned int gp_count = x86_THREAD_STATE_COUNT;
kern_return_t ret;


ret = thread_get_state
(current_thread, x86_THREAD_STATE, (thread_state_t) & gp_regs,
&gp_count);
if (ret != KERN_SUCCESS)
{
printf_unfiltered (_("Error calling thread_get_state for GP registers for thread 0x%ulx"), current_thread);
MACH_CHECK_ERROR (ret);
}
amd64_supply_native_gregset (regcache, &gp_regs.uts, -1);
fetched++;
}


if (regno == -1 || !amd64_native_gregset_supplies_p (gdbarch, regno))
{
x86_float_state_t fp_regs;
unsigned int fp_count = x86_FLOAT_STATE_COUNT;
kern_return_t ret;


ret = thread_get_state
(current_thread, x86_FLOAT_STATE, (thread_state_t) & fp_regs,
&fp_count);
if (ret != KERN_SUCCESS)
{
printf_unfiltered (_("Error calling thread_get_state for float registers for thread 0x%ulx"), current_thread);
MACH_CHECK_ERROR (ret);
}
i387_supply_fxsave (regcache, -1, &fp_regs.ufs.fs64);
fetched++;
}
}
else
{
if (regno == -1 || regno < I386_NUM_GREGS)
{
i386_thread_state_t gp_regs;
unsigned int gp_count = i386_THREAD_STATE_COUNT;
kern_return_t ret;
int i;


ret = thread_get_state
(current_thread, i386_THREAD_STATE, (thread_state_t) & gp_regs,
&gp_count);
if (ret != KERN_SUCCESS)
{
printf_unfiltered (_("Error calling thread_get_state for GP registers for thread 0x%ulx"), current_thread);
MACH_CHECK_ERROR (ret);
}
for (i = 0; i < I386_NUM_GREGS; i++)
regcache_raw_supply
(regcache, i,
(char *)&gp_regs + i386_darwin_thread_state_reg_offset[i]);


          fetched++;
        }

      if (regno == -1
	  || (regno >= I386_ST0_REGNUM && regno < I386_SSE_NUM_REGS))
        {
          i386_float_state_t fp_regs;
          unsigned int fp_count = i386_FLOAT_STATE_COUNT;
          kern_return_t ret;

ret = thread_get_state
(current_thread, i386_FLOAT_STATE, (thread_state_t) & fp_regs,
&fp_count);
if (ret != KERN_SUCCESS)
{
printf_unfiltered (_("Error calling thread_get_state for float registers for thread 0x%ulx"), current_thread);
MACH_CHECK_ERROR (ret);
}
i387_supply_fxsave (regcache, -1, &fp_regs.__fpu_fcw);
fetched++;
}
}


  if (! fetched)
    {
      warning (_("unknown register %d"), regno);
      regcache_raw_supply (regcache, regno, NULL);
    }
}

/* Store our register values back into the inferior.
   If REGNO is -1, do this for all registers.
   Otherwise, REGNO specifies which register (so we can save time).  */

static void
i386_darwin_store_inferior_registers (struct regcache *regcache, int regno)
{
thread_t current_thread = ptid_get_tid (inferior_ptid);
struct gdbarch *gdbarch = get_regcache_arch (regcache);


if (gdbarch_ptr_bit (gdbarch) == 64)
{
if (regno == -1 || amd64_native_gregset_supplies_p (gdbarch, regno))
{
x86_thread_state_t gp_regs;
kern_return_t ret;
unsigned int gp_count = x86_THREAD_STATE_COUNT;


	  ret = thread_get_state
	    (current_thread, x86_THREAD_STATE, (thread_state_t) &gp_regs,
	     &gp_count);
          MACH_CHECK_ERROR (ret);
	  gdb_assert (gp_regs.tsh.flavor == x86_THREAD_STATE64);
          gdb_assert (gp_regs.tsh.count == x86_THREAD_STATE64_COUNT);

amd64_collect_native_gregset (regcache, &gp_regs.uts, regno);

          ret = thread_set_state (current_thread, x86_THREAD_STATE,
                                  (thread_state_t) &gp_regs,
                                  x86_THREAD_STATE_COUNT);
          MACH_CHECK_ERROR (ret);
        }

if (regno == -1 || !amd64_native_gregset_supplies_p (gdbarch, regno))
{
x86_float_state_t fp_regs;
kern_return_t ret;
unsigned int fp_count = x86_FLOAT_STATE_COUNT;


	  ret = thread_get_state
	    (current_thread, x86_FLOAT_STATE, (thread_state_t) & fp_regs,
	     &fp_count);
          MACH_CHECK_ERROR (ret);
          gdb_assert (fp_regs.fsh.flavor == x86_FLOAT_STATE64);
          gdb_assert (fp_regs.fsh.count == x86_FLOAT_STATE64_COUNT);

i387_collect_fxsave (regcache, regno, &fp_regs.ufs.fs64.__fpu_fcw);

	  ret = thread_set_state (current_thread, x86_FLOAT_STATE,
				  (thread_state_t) & fp_regs,
				  x86_FLOAT_STATE_COUNT);
	  MACH_CHECK_ERROR (ret);
        }
    }
  else
    {
      if (regno == -1 || regno < I386_NUM_GREGS)
        {
          i386_thread_state_t gp_regs;
          kern_return_t ret;
          unsigned int gp_count = i386_THREAD_STATE_COUNT;
	  int i;

ret = thread_get_state
(current_thread, i386_THREAD_STATE, (thread_state_t) & gp_regs,
&gp_count);
MACH_CHECK_ERROR (ret);


	  for (i = 0; i < I386_NUM_GREGS; i++)
	    if (regno == -1 || regno == i)
	      regcache_raw_collect
		(regcache, i,
		 (char *)&gp_regs + i386_darwin_thread_state_reg_offset[i]);

          ret = thread_set_state (current_thread, i386_THREAD_STATE,
                                  (thread_state_t) & gp_regs,
                                  i386_THREAD_STATE_COUNT);
          MACH_CHECK_ERROR (ret);
        }

      if (regno == -1
	  || (regno >= I386_ST0_REGNUM && regno < I386_SSE_NUM_REGS))
        {
          i386_float_state_t fp_regs;
          unsigned int fp_count = i386_FLOAT_STATE_COUNT;
          kern_return_t ret;

ret = thread_get_state
(current_thread, i386_FLOAT_STATE, (thread_state_t) & fp_regs,
&fp_count);
MACH_CHECK_ERROR (ret);


i387_collect_fxsave (regcache, regno, &fp_regs.__fpu_fcw);

	  ret = thread_set_state (current_thread, i386_FLOAT_STATE,
				  (thread_state_t) & fp_regs,
				  i386_FLOAT_STATE_COUNT);
	  MACH_CHECK_ERROR (ret);
        }
    }
}


/* Support for debug registers, boosted mostly from i386-linux-nat.c. */


#ifndef DR_FIRSTADDR
#define DR_FIRSTADDR 0
#endif

#ifndef DR_LASTADDR
#define DR_LASTADDR 3
#endif

#ifndef DR_STATUS
#define DR_STATUS 6
#endif

#ifndef DR_CONTROL
#define DR_CONTROL 7
#endif


static void i386_darwin_dr_set (int regnum, uint32_t value) { int current_pid; thread_t current_thread; x86_debug_state_t dr_regs; kern_return_t ret; unsigned int dr_count = x86_DEBUG_STATE_COUNT;

gdb_assert (regnum >= 0 && regnum <= DR_CONTROL);

current_thread = ptid_get_tid (inferior_ptid);

  dr_regs.dsh.flavor = x86_DEBUG_STATE32;
  dr_regs.dsh.count = x86_DEBUG_STATE32_COUNT;
  dr_count = x86_DEBUG_STATE_COUNT;
  ret = thread_get_state (current_thread, x86_DEBUG_STATE,
                          (thread_state_t) &dr_regs, &dr_count);

if (ret != KERN_SUCCESS)
{
printf_unfiltered (_("Error reading debug registers thread 0x%x via thread_get_state\n"), (int) current_thread);
MACH_CHECK_ERROR (ret);
}


  switch (regnum)
    {
      case 0:
        dr_regs.uds.ds32.__dr0 = value;
        break;
      case 1:
        dr_regs.uds.ds32.__dr1 = value;
        break;
      case 2:
        dr_regs.uds.ds32.__dr2 = value;
        break;
      case 3:
        dr_regs.uds.ds32.__dr3 = value;
        break;
      case 4:
        dr_regs.uds.ds32.__dr4 = value;
        break;
      case 5:
        dr_regs.uds.ds32.__dr5 = value;
        break;
      case 6:
        dr_regs.uds.ds32.__dr6 = value;
        break;
      case 7:
        dr_regs.uds.ds32.__dr7 = value;
        break;
    }

  ret = thread_set_state (current_thread, x86_DEBUG_STATE,
                          (thread_state_t) &dr_regs, dr_count);

if (ret != KERN_SUCCESS)
{
printf_unfiltered (_("Error writing debug registers thread 0x%x via thread_get_state\n"), (int) current_thread);
MACH_CHECK_ERROR (ret);
}
}



static uint32_t i386_darwin_dr_get (int regnum) { thread_t current_thread; x86_debug_state_t dr_regs; kern_return_t ret; unsigned int dr_count = x86_DEBUG_STATE_COUNT;

gdb_assert (regnum >= 0 && regnum <= DR_CONTROL);

current_thread = ptid_get_tid (inferior_ptid);

  dr_regs.dsh.flavor = x86_DEBUG_STATE32;
  dr_regs.dsh.count = x86_DEBUG_STATE32_COUNT;
  dr_count = x86_DEBUG_STATE_COUNT;
  ret = thread_get_state (current_thread, x86_DEBUG_STATE,
                          (thread_state_t) &dr_regs, &dr_count);

if (ret != KERN_SUCCESS)
{
printf_unfiltered (_("Error reading debug registers thread 0x%x via thread_get_state\n"), (int) current_thread);
MACH_CHECK_ERROR (ret);
}


  switch (regnum)
    {
      case 0:
        return dr_regs.uds.ds32.__dr0;
      case 1:
        return dr_regs.uds.ds32.__dr1;
      case 2:
        return dr_regs.uds.ds32.__dr2;
      case 3:
        return dr_regs.uds.ds32.__dr3;
      case 4:
        return dr_regs.uds.ds32.__dr4;
      case 5:
        return dr_regs.uds.ds32.__dr5;
      case 6:
        return dr_regs.uds.ds32.__dr6;
      case 7:
        return dr_regs.uds.ds32.__dr7;
      default:
        return -1;
    }
}

void
i386_darwin_dr_set_control (unsigned long control)
{
  i386_darwin_dr_set (DR_CONTROL, control);
}

void
i386_darwin_dr_set_addr (int regnum, CORE_ADDR addr)
{
  gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR);

  i386_darwin_dr_set (DR_FIRSTADDR + regnum, addr);
}

void
i386_darwin_dr_reset_addr (int regnum)
{
  gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR);

  i386_darwin_dr_set (DR_FIRSTADDR + regnum, 0L);
}

unsigned long
i386_darwin_dr_get_status (void)
{
  return i386_darwin_dr_get (DR_STATUS);
}

void
darwin_check_osabi (darwin_inferior *inf, thread_t thread)
{
  if (gdbarch_osabi (current_gdbarch) == GDB_OSABI_UNKNOWN)
    {
      /* Attaching to a process.  Let's figure out what kind it is. */
      x86_thread_state_t gp_regs;
      struct gdbarch_info info;
      unsigned int gp_count = x86_THREAD_STATE_COUNT;
      kern_return_t ret;

      ret = thread_get_state (thread, x86_THREAD_STATE,
			      (thread_state_t) &gp_regs, &gp_count);
      if (ret != KERN_SUCCESS)
	{
	  MACH_CHECK_ERROR (ret);
	  return;
	}

      gdbarch_info_init (&info);
      gdbarch_info_fill (&info);
      info.byte_order = gdbarch_byte_order (current_gdbarch);
      info.osabi = GDB_OSABI_DARWIN;
      if (gp_regs.tsh.flavor == x86_THREAD_STATE64)
	info.bfd_arch_info = bfd_lookup_arch (bfd_arch_i386,
					      bfd_mach_x86_64);
      else
	info.bfd_arch_info = bfd_lookup_arch (bfd_arch_i386,
					      bfd_mach_i386_i386);
      gdbarch_update_p (info);
    }
}

#define X86_EFLAGS_T 0x100UL

void
darwin_set_sstep (thread_t thread, int enable)
{
  x86_thread_state_t regs;
  unsigned int count = x86_THREAD_STATE_COUNT;
  kern_return_t kret;

kret = thread_get_state (thread, x86_THREAD_STATE,
(thread_state_t) &regs, &count);
if (kret != KERN_SUCCESS)
{
printf_unfiltered (_("darwin_set_sstep: error %x, thread=%x\n"),
kret, thread);
return;
}
switch (regs.tsh.flavor)
{
case x86_THREAD_STATE32:
{
__uint32_t bit = enable ? X86_EFLAGS_T : 0;

if ((regs.uts.ts32.__eflags & X86_EFLAGS_T) == bit)
return;
regs.uts.ts32.__eflags = (regs.uts.ts32.__eflags & ~X86_EFLAGS_T) | bit;
kret = thread_set_state (thread, x86_THREAD_STATE,
(thread_state_t) &regs, count);
MACH_CHECK_ERROR (kret);
}
break;
case x86_THREAD_STATE64:
{
__uint64_t bit = enable ? X86_EFLAGS_T : 0;


if ((regs.uts.ts64.__rflags & X86_EFLAGS_T) == bit)
return;
regs.uts.ts64.__rflags = (regs.uts.ts64.__rflags & ~X86_EFLAGS_T) | bit;
kret = thread_set_state (thread, x86_THREAD_STATE,
(thread_state_t) &regs, count);
MACH_CHECK_ERROR (kret);
}
break;
default:
error (_("darwin_set_sstep: unknown flavour: %d\n"), regs.tsh.flavor);
}
}


void
darwin_complete_target (struct target_ops *target)
{
amd64_native_gregset64_reg_offset = amd64_darwin_thread_state_reg_offset;
amd64_native_gregset64_num_regs = amd64_darwin_thread_state_num_regs;
amd64_native_gregset32_reg_offset = i386_darwin_thread_state_reg_offset;
amd64_native_gregset32_num_regs = i386_darwin_thread_state_num_regs;


  target->to_fetch_registers = i386_darwin_fetch_inferior_registers;
  target->to_store_registers = i386_darwin_store_inferior_registers;
}


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]