/* Native-dependent code for modern i386 BSD's.
- Copyright (C) 2000 Free Software Foundation, Inc.
+ Copyright 2000, 2001 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "inferior.h"
+#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>
typedef struct fpreg fpregset_t;
#endif
+#include "gregset.h"
+\f
+
/* In older BSD versions we cannot get at some of the segment
registers. FreeBSD for example didn't support the %fs and %gs
registers until the 3.0 release. We have autoconf checks for their
/* Registers we shouldn't try to store. */
#if !defined (CANNOT_STORE_REGISTER)
-#define CANNOT_STORE_REGISTER(regno) CANNOT_FETCH_REGISTER (regno)
+#define CANNOT_STORE_REGISTER(regno) cannot_fetch_register (regno)
#endif
/* Offset to the gregset_t location where REG is stored. */
REG_OFFSET (r_ss),
REG_OFFSET (r_ds),
REG_OFFSET (r_es),
-#ifdef HAVE_R_FS
+#ifdef HAVE_STRUCT_REG_R_FS
REG_OFFSET (r_fs),
#else
-1,
#endif
-#ifdef HAVE_R_GS
+#ifdef HAVE_STRUCT_REG_R_GS
REG_OFFSET (r_gs)
#else
-1
/* Transfering the registers between GDB, inferiors and core files. */
-/* Fill GDB's register array with the genereal-purpose register values
+/* Fill GDB's register array with the general-purpose register values
in *GREGSETP. */
void
supply_gregset (gregset_t *gregsetp)
{
- char buf[MAX_REGISTER_RAW_SIZE];
int i;
for (i = 0; i < NUM_GREGS; i++)
{
if (CANNOT_FETCH_REGISTER (i))
- {
- memset (buf, 0, REGISTER_RAW_SIZE (i));
- supply_register (i, buf);
- }
+ supply_register (i, NULL);
else
supply_register (i, REG_ADDR (gregsetp, i));
}
for (i = 0; i < NUM_GREGS; i++)
if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i))
- memcpy (REG_ADDR (gregsetp, i), ®isters[REGISTER_BYTE (regno)],
+ memcpy (REG_ADDR (gregsetp, i), ®isters[REGISTER_BYTE (i)],
REGISTER_RAW_SIZE (i));
}
{
gregset_t gregs;
- if (ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
+ if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
perror_with_name ("Couldn't get registers");
supply_gregset (&gregs);
{
fpregset_t fpregs;
- if (ptrace (PT_GETFPREGS, inferior_pid,
+ 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);
}
-}
+}
/* Store register REGNO back into the inferior. If REGNO is -1, do
this for all registers (including the floating point registers). */
{
gregset_t gregs;
- if (ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
+ if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
perror_with_name ("Couldn't get registers");
fill_gregset (&gregs, regno);
- if (ptrace (PT_SETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
+ if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
perror_with_name ("Couldn't write registers");
if (regno == -1 || regno >= FP0_REGNUM)
{
fpregset_t fpregs;
- if (ptrace (PT_GETFPREGS, inferior_pid,
+ 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);
- if (ptrace (PT_SETFPREGS, inferior_pid,
+ if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't write floating point status");
}
}
\f
+/* Support for debug registers. */
+
+#ifdef HAVE_PT_GETDBREGS
+
+/* Not all versions of FreeBSD/i386 that support the debug registers
+ have this macro. */
+#ifndef DBREG_DRX
+#define DBREG_DRX(d, x) ((&d->dr0)[x])
+#endif
+
+static void
+i386bsd_dr_set (int regnum, unsigned int value)
+{
+ struct dbreg dbregs;
+
+ if (ptrace (PT_GETDBREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) &dbregs, 0) == -1)
+ perror_with_name ("Couldn't get debug registers");
+
+ /* For some mysterious reason, some of the reserved bits in the
+ debug control register get set. Mask these off, otherwise the
+ ptrace call below will fail. */
+ dbregs.dr7 &= ~(0x0000fc00);
+
+ DBREG_DRX ((&dbregs), regnum) = value;
+
+ if (ptrace (PT_SETDBREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) &dbregs, 0) == -1)
+ perror_with_name ("Couldn't write debug registers");
+}
+
+void
+i386bsd_dr_set_control (unsigned long control)
+{
+ i386bsd_dr_set (7, control);
+}
+
+void
+i386bsd_dr_set_addr (int regnum, CORE_ADDR addr)
+{
+ gdb_assert (regnum >= 0 && regnum <= 4);
+
+ i386bsd_dr_set (regnum, addr);
+}
+
+void
+i386bsd_dr_reset_addr (int regnum)
+{
+ gdb_assert (regnum >= 0 && regnum <= 4);
+
+ i386bsd_dr_set (regnum, 0);
+}
+
+unsigned long
+i386bsd_dr_get_status (void)
+{
+ struct dbreg dbregs;
+
+ /* 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 vector. For now, just return zero if the
+ ptrace call fails. */
+ if (ptrace (PT_GETDBREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) & dbregs, 0) == -1)
+#if 0
+ perror_with_name ("Couldn't read debug registers");
+#else
+ return 0;
+#endif
+
+ return dbregs.dr6;
+}
+
+#endif /* PT_GETDBREGS */
+\f
+
/* Support for the user struct. */
/* Return the address register REGNO. BLOCKEND is the value of
{
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);
+}
projects / deliverable / binutils-gdb.git / blobdiff