/* Native-dependent code for modern i386 BSD's.
- Copyright 2000, 2001 Free Software Foundation, Inc.
+ Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
This file is part of GDB.
#include "regcache.h"
#include "gdb_assert.h"
+#include <signal.h>
+#include <stddef.h>
#include <sys/types.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
REG_OFFSET (r_eax),
REG_OFFSET (r_ecx),
REG_OFFSET (r_edx),
- REG_OFFSET (r_edx),
+ REG_OFFSET (r_ebx),
REG_OFFSET (r_esp),
REG_OFFSET (r_ebp),
REG_OFFSET (r_esi),
#define REG_ADDR(regset, regno) ((char *) (regset) + reg_offset[regno])
+/* Macro to determine if a register is fetched with PT_GETREGS. */
+#define GETREGS_SUPPLIES(regno) \
+ ((0 <= (regno) && (regno) <= 15))
+
+#ifdef HAVE_PT_GETXMMREGS
+/* Set to 1 if the kernel supports PT_GETXMMREGS. Initialized to -1
+ so that we try PT_GETXMMREGS the first time around. */
+static int have_ptrace_xmmregs = -1;
+#endif
+
/* Return nonzero if we shouldn't try to fetch register REGNO. */
static int
for (i = 0; i < NUM_GREGS; i++)
if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i))
- memcpy (REG_ADDR (gregsetp, i), ®isters[REGISTER_BYTE (i)],
- REGISTER_RAW_SIZE (i));
+ regcache_collect (i, REG_ADDR (gregsetp, i));
}
-#include "i387-nat.h"
+#include "i387-tdep.h"
/* Fill GDB's register array with the floating-point register values
in *FPREGSETP. */
void
fetch_inferior_registers (int regno)
{
- gregset_t gregs;
- if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
- (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
- perror_with_name ("Couldn't get registers");
+ if (regno == -1 || GETREGS_SUPPLIES (regno))
+ {
+ gregset_t gregs;
+
+ if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
+ perror_with_name ("Couldn't get registers");
- supply_gregset (&gregs);
+ supply_gregset (&gregs);
+ if (regno != -1)
+ return;
+ }
if (regno == -1 || regno >= FP0_REGNUM)
{
fpregset_t fpregs;
+#ifdef HAVE_PT_GETXMMREGS
+ char xmmregs[512];
+
+ if (have_ptrace_xmmregs != 0 &&
+ ptrace(PT_GETXMMREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) xmmregs, 0) == 0)
+ {
+ have_ptrace_xmmregs = 1;
+ i387_supply_fxsave (xmmregs);
+ }
+ else
+ {
+ if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
+ perror_with_name ("Couldn't get floating point status");
+ supply_fpregset (&fpregs);
+ }
+#else
if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't get floating point status");
supply_fpregset (&fpregs);
+#endif
}
}
void
store_inferior_registers (int regno)
{
- gregset_t gregs;
- if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
- (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
- perror_with_name ("Couldn't get registers");
+ if (regno == -1 || GETREGS_SUPPLIES (regno))
+ {
+ gregset_t gregs;
- fill_gregset (&gregs, regno);
+ if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
+ perror_with_name ("Couldn't get registers");
- if (ptrace (PT_SETREGS, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
- perror_with_name ("Couldn't write registers");
+ fill_gregset (&gregs, regno);
+
+ if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
+ perror_with_name ("Couldn't write registers");
+
+ if (regno != -1)
+ return;
+ }
if (regno == -1 || regno >= FP0_REGNUM)
{
fpregset_t fpregs;
+#ifdef HAVE_PT_GETXMMREGS
+ char xmmregs[512];
- if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
- (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
- perror_with_name ("Couldn't get floating point status");
+ if (have_ptrace_xmmregs != 0 &&
+ ptrace(PT_GETXMMREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) xmmregs, 0) == 0)
+ {
+ have_ptrace_xmmregs = 1;
+
+ i387_fill_fxsave (xmmregs, regno);
+
+ if (ptrace (PT_SETXMMREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) xmmregs, 0) == -1)
+ perror_with_name ("Couldn't write XMM registers");
+ }
+ else
+ {
+ have_ptrace_xmmregs = 0;
+#endif
+ if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
+ perror_with_name ("Couldn't get floating point status");
- fill_fpregset (&fpregs, regno);
+ fill_fpregset (&fpregs, regno);
- if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
- (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
- perror_with_name ("Couldn't write floating point status");
+ if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
+ perror_with_name ("Couldn't write floating point status");
+#ifdef HAVE_PT_GETXMMREGS
+ }
+#endif
}
}
\f
/* FIXME: kettenis/2001-03-31: Calling perror_with_name if the
ptrace call fails breaks debugging remote targets. The correct
way to fix this is to add the hardware breakpoint and watchpoint
- stuff to the target vectore. For now, just return zero if the
+ stuff to the target vector. For now, just return zero if the
ptrace call fails. */
if (ptrace (PT_GETDBREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) & dbregs, 0) == -1)
{
return (sizeof (struct user));
}
+\f
+/* See i386bsd-tdep.c. */
+extern int i386bsd_sigcontext_pc_offset;
+
+void
+_initialize_i386bsd_nat (void)
+{
+ /* To support the recognition of signal handlers, i386bsd-tdep.c
+ hardcodes some constants. Inclusion of this file means that we
+ are compiling a native debugger, which means that we can use the
+ system header files and sysctl(3) to get at the relevant
+ information. */
+
+ /* Override the default value for the offset of the program counter
+ in the sigcontext structure. */
+ i386bsd_sigcontext_pc_offset = offsetof (struct sigcontext, sc_pc);
+}