/* Native-dependent code for AMD64.
- Copyright (C) 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
+ Copyright (C) 2003-2018 Free Software Foundation, Inc.
This file is part of GDB.
#include "gdbarch.h"
#include "regcache.h"
-#include "gdb_assert.h"
-#include "gdb_string.h"
-
#include "i386-tdep.h"
#include "amd64-tdep.h"
+#include "amd64-nat.h"
/* The following bits of code help with implementing debugging 32-bit
code natively on AMD64. The idea is to define two mappings between
general-purpose register set. */
static int
-amd64_native_gregset_reg_offset (int regnum)
+amd64_native_gregset_reg_offset (struct gdbarch *gdbarch, int regnum)
{
int *reg_offset = amd64_native_gregset64_reg_offset;
int num_regs = amd64_native_gregset64_num_regs;
gdb_assert (regnum >= 0);
- if (gdbarch_ptr_bit (current_gdbarch) == 32)
+ if (gdbarch_bfd_arch_info (gdbarch)->bits_per_word == 32)
{
reg_offset = amd64_native_gregset32_reg_offset;
num_regs = amd64_native_gregset32_num_regs;
}
- if (num_regs > gdbarch_num_regs (current_gdbarch))
- num_regs = gdbarch_num_regs (current_gdbarch);
+ if (num_regs > gdbarch_num_regs (gdbarch))
+ num_regs = gdbarch_num_regs (gdbarch);
+
+ if (regnum >= num_regs)
+ return -1;
- if (regnum < num_regs && regnum < gdbarch_num_regs (current_gdbarch))
- return reg_offset[regnum];
+ /* Kernels that predate Linux 2.6.25 don't provide access to
+ these segment registers in user_regs_struct. */
+#ifndef HAVE_STRUCT_USER_REGS_STRUCT_FS_BASE
+ if (regnum == AMD64_FSBASE_REGNUM || regnum == AMD64_GSBASE_REGNUM)
+ return -1;
+#endif
- return -1;
+ return reg_offset[regnum];
}
/* Return whether the native general-purpose register set supplies
register REGNUM. */
int
-amd64_native_gregset_supplies_p (int regnum)
+amd64_native_gregset_supplies_p (struct gdbarch *gdbarch, int regnum)
{
- return (amd64_native_gregset_reg_offset (regnum) != -1);
+ return (amd64_native_gregset_reg_offset (gdbarch, regnum) != -1);
}
amd64_supply_native_gregset (struct regcache *regcache,
const void *gregs, int regnum)
{
- const char *regs = gregs;
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ const char *regs = (const char *) gregs;
+ struct gdbarch *gdbarch = regcache->arch ();
int num_regs = amd64_native_gregset64_num_regs;
int i;
- if (gdbarch_ptr_bit (gdbarch) == 32)
+ if (gdbarch_bfd_arch_info (gdbarch)->bits_per_word == 32)
num_regs = amd64_native_gregset32_num_regs;
if (num_regs > gdbarch_num_regs (gdbarch))
{
if (regnum == -1 || regnum == i)
{
- int offset = amd64_native_gregset_reg_offset (i);
+ int offset = amd64_native_gregset_reg_offset (gdbarch, i);
if (offset != -1)
regcache_raw_supply (regcache, i, regs + offset);
amd64_collect_native_gregset (const struct regcache *regcache,
void *gregs, int regnum)
{
- char *regs = gregs;
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ char *regs = (char *) gregs;
+ struct gdbarch *gdbarch = regcache->arch ();
int num_regs = amd64_native_gregset64_num_regs;
int i;
- if (gdbarch_ptr_bit (gdbarch) == 32)
+ if (gdbarch_bfd_arch_info (gdbarch)->bits_per_word == 32)
{
num_regs = amd64_native_gregset32_num_regs;
for (i = 0; i <= I386_EIP_REGNUM; i++)
{
if (regnum == -1 || regnum == i)
- memset (regs + amd64_native_gregset_reg_offset (i), 0, 8);
+ memset (regs + amd64_native_gregset_reg_offset (gdbarch, i), 0, 8);
}
/* Ditto for %cs, %ss, %ds, %es, %fs, and %gs. */
for (i = I386_CS_REGNUM; i <= I386_GS_REGNUM; i++)
{
if (regnum == -1 || regnum == i)
- memset (regs + amd64_native_gregset_reg_offset (i), 0, 8);
+ memset (regs + amd64_native_gregset_reg_offset (gdbarch, i), 0, 8);
}
}
{
if (regnum == -1 || regnum == i)
{
- int offset = amd64_native_gregset_reg_offset (i);
+ int offset = amd64_native_gregset_reg_offset (gdbarch, i);
if (offset != -1)
regcache_raw_collect (regcache, i, regs + offset);