/* Native-dependent code for GNU/Linux i386.
Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
- 2009, 2010 Free Software Foundation, Inc.
+ 2009, 2010, 2011 Free Software Foundation, Inc.
This file is part of GDB.
those names are now used for the register sets used in the
`mcontext_t' type, and have a different size and layout. */
-/* Mapping between the general-purpose registers in `struct user'
- format and GDB's register array layout. */
-static int regmap[] =
-{
- EAX, ECX, EDX, EBX,
- UESP, EBP, ESI, EDI,
- EIP, EFL, CS, SS,
- DS, ES, FS, GS,
- -1, -1, -1, -1, /* st0, st1, st2, st3 */
- -1, -1, -1, -1, /* st4, st5, st6, st7 */
- -1, -1, -1, -1, /* fctrl, fstat, ftag, fiseg */
- -1, -1, -1, -1, /* fioff, foseg, fooff, fop */
- -1, -1, -1, -1, /* xmm0, xmm1, xmm2, xmm3 */
- -1, -1, -1, -1, /* xmm4, xmm5, xmm6, xmm6 */
- -1, /* mxcsr */
- -1, -1, -1, -1, /* ymm0h, ymm1h, ymm2h, ymm3h */
- -1, -1, -1, -1, /* ymm4h, ymm5h, ymm6h, ymm6h */
- ORIG_EAX
-};
-
/* Which ptrace request retrieves which registers?
These apply to the corresponding SET requests as well. */
for this to be a simple variable. */
int have_ptrace_getfpxregs =
#ifdef HAVE_PTRACE_GETFPXREGS
- 1
+ -1
#else
0
#endif
int val;
gdb_assert (!have_ptrace_getregs);
- if (regmap[regno] == -1)
+ if (i386_linux_gregset_reg_offset[regno] == -1)
{
regcache_raw_supply (regcache, regno, NULL);
return;
tid = PIDGET (inferior_ptid); /* Not a threaded program. */
errno = 0;
- val = ptrace (PTRACE_PEEKUSER, tid, 4 * regmap[regno], 0);
+ val = ptrace (PTRACE_PEEKUSER, tid,
+ i386_linux_gregset_reg_offset[regno], 0);
if (errno != 0)
error (_("Couldn't read register %s (#%d): %s."),
gdbarch_register_name (get_regcache_arch (regcache), regno),
regcache_raw_supply (regcache, regno, &val);
}
-/* Store one register. */
+/* Store one register. */
static void
store_register (const struct regcache *regcache, int regno)
int val;
gdb_assert (!have_ptrace_getregs);
- if (regmap[regno] == -1)
+ if (i386_linux_gregset_reg_offset[regno] == -1)
return;
/* GNU/Linux LWP ID's are process ID's. */
errno = 0;
regcache_raw_collect (regcache, regno, &val);
- ptrace (PTRACE_POKEUSER, tid, 4 * regmap[regno], val);
+ ptrace (PTRACE_POKEUSER, tid,
+ i386_linux_gregset_reg_offset[regno], val);
if (errno != 0)
error (_("Couldn't write register %s (#%d): %s."),
gdbarch_register_name (get_regcache_arch (regcache), regno),
void
supply_gregset (struct regcache *regcache, const elf_gregset_t *gregsetp)
{
- const elf_greg_t *regp = (const elf_greg_t *) gregsetp;
+ const gdb_byte *regp = (const gdb_byte *) gregsetp;
int i;
for (i = 0; i < I386_NUM_GREGS; i++)
- regcache_raw_supply (regcache, i, regp + regmap[i]);
+ regcache_raw_supply (regcache, i,
+ regp + i386_linux_gregset_reg_offset[i]);
if (I386_LINUX_ORIG_EAX_REGNUM
< gdbarch_num_regs (get_regcache_arch (regcache)))
- regcache_raw_supply (regcache, I386_LINUX_ORIG_EAX_REGNUM,
- regp + ORIG_EAX);
+ regcache_raw_supply (regcache, I386_LINUX_ORIG_EAX_REGNUM, regp
+ + i386_linux_gregset_reg_offset[I386_LINUX_ORIG_EAX_REGNUM]);
}
/* Fill register REGNO (if it is a general-purpose register) in
fill_gregset (const struct regcache *regcache,
elf_gregset_t *gregsetp, int regno)
{
- elf_greg_t *regp = (elf_greg_t *) gregsetp;
+ gdb_byte *regp = (gdb_byte *) gregsetp;
int i;
for (i = 0; i < I386_NUM_GREGS; i++)
if (regno == -1 || regno == i)
- regcache_raw_collect (regcache, i, regp + regmap[i]);
+ regcache_raw_collect (regcache, i,
+ regp + i386_linux_gregset_reg_offset[i]);
if ((regno == -1 || regno == I386_LINUX_ORIG_EAX_REGNUM)
&& I386_LINUX_ORIG_EAX_REGNUM
< gdbarch_num_regs (get_regcache_arch (regcache)))
- regcache_raw_collect (regcache, I386_LINUX_ORIG_EAX_REGNUM,
- regp + ORIG_EAX);
+ regcache_raw_collect (regcache, I386_LINUX_ORIG_EAX_REGNUM, regp
+ + i386_linux_gregset_reg_offset[I386_LINUX_ORIG_EAX_REGNUM]);
}
#ifdef HAVE_PTRACE_GETREGS
#else
-static void fetch_fpregs (struct regcache *regcache, int tid) {}
-static void store_fpregs (const struct regcache *regcache, int tid, int regno) {}
+static void
+fetch_fpregs (struct regcache *regcache, int tid)
+{
+}
+
+static void
+store_fpregs (const struct regcache *regcache, int tid, int regno)
+{
+}
#endif
\f
#ifdef HAVE_PTRACE_GETFPXREGS
-/* Fill GDB's register array with the floating-point and SSE register
- values in *FPXREGSETP. */
-
-void
-supply_fpxregset (struct regcache *regcache,
- const elf_fpxregset_t *fpxregsetp)
-{
- i387_supply_fxsave (regcache, -1, fpxregsetp);
-}
-
-/* Fill register REGNO (if it is a floating-point or SSE register) in
- *FPXREGSETP with the value in GDB's register array. If REGNO is
- -1, do this for all registers. */
-
-void
-fill_fpxregset (const struct regcache *regcache,
- elf_fpxregset_t *fpxregsetp, int regno)
-{
- i387_collect_fxsave (regcache, regno, fpxregsetp);
-}
-
/* Fetch all registers covered by the PTRACE_GETFPXREGS request from
process/thread TID and store their values in GDB's register array.
Return non-zero if successful, zero otherwise. */
perror_with_name (_("Couldn't read floating-point and SSE registers"));
}
- supply_fpxregset (regcache, (const elf_fpxregset_t *) &fpxregs);
+ i387_supply_fxsave (regcache, -1, (const elf_fpxregset_t *) &fpxregs);
return 1;
}
perror_with_name (_("Couldn't read floating-point and SSE registers"));
}
- fill_fpxregset (regcache, &fpxregs, regno);
+ i387_collect_fxsave (regcache, regno, &fpxregs);
if (ptrace (PTRACE_SETFPXREGS, tid, 0, &fpxregs) == -1)
perror_with_name (_("Couldn't write floating-point and SSE registers"));
#else
-static int fetch_fpxregs (struct regcache *regcache, int tid) { return 0; }
-static int store_fpxregs (const struct regcache *regcache, int tid, int regno) { return 0; }
+static int
+fetch_fpxregs (struct regcache *regcache, int tid)
+{
+ return 0;
+}
+
+static int
+store_fpxregs (const struct regcache *regcache, int tid, int regno)
+{
+ return 0;
+}
#endif /* HAVE_PTRACE_GETFPXREGS */
\f
call.
Is this function needed? I'm guessing that the `base' is the
- address of a a descriptor that libthread_db uses to find the
+ address of a descriptor that libthread_db uses to find the
thread local address base that GDB needs. Perhaps that
descriptor is defined by the ABI. Anyway, given that
libthread_db calls this function without prompting (gdb
static const struct target_desc *
i386_linux_read_description (struct target_ops *ops)
{
+ int tid;
static uint64_t xcr0;
+ /* GNU/Linux LWP ID's are process ID's. */
+ tid = TIDGET (inferior_ptid);
+ if (tid == 0)
+ tid = PIDGET (inferior_ptid); /* Not a threaded program. */
+
+#ifdef HAVE_PTRACE_GETFPXREGS
+ if (have_ptrace_getfpxregs == -1)
+ {
+ elf_fpxregset_t fpxregs;
+
+ if (ptrace (PTRACE_GETFPXREGS, tid, 0, (int) &fpxregs) < 0)
+ {
+ have_ptrace_getfpxregs = 0;
+ have_ptrace_getregset = 0;
+ return tdesc_i386_mmx_linux;
+ }
+ }
+#endif
+
if (have_ptrace_getregset == -1)
{
- int tid;
uint64_t xstateregs[(I386_XSTATE_SSE_SIZE / sizeof (uint64_t))];
struct iovec iov;
- /* GNU/Linux LWP ID's are process ID's. */
- tid = TIDGET (inferior_ptid);
- if (tid == 0)
- tid = PIDGET (inferior_ptid); /* Not a threaded program. */
-
iov.iov_base = xstateregs;
iov.iov_len = sizeof (xstateregs);