--- /dev/null
+/* Native-dependent code for FreeBSD/amd64.
+ Copyright 2003 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 2 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, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#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 <sys/sysctl.h>
+#include <machine/reg.h>
+
+#ifdef HAVE_SYS_PROCFS_H
+#include <sys/procfs.h>
+#endif
+
+#ifndef HAVE_GREGSET_T
+typedef struct reg gregset_t;
+#endif
+
+#ifndef HAVE_FPREGSET_T
+typedef struct fpreg fpregset_t;
+#endif
+
+#include "gregset.h"
+#include "x86-64-tdep.h"
+\f
+
+/* Offset to the gregset_t location where REG is stored. */
+#define REG_OFFSET(reg) offsetof (gregset_t, reg)
+
+/* At reg_offset[REGNO] you'll find the offset to the gregset_t
+ location where the GDB register REGNO is stored. Unsupported
+ registers are marked with `-1'. */
+static int reg_offset[] =
+{
+ REG_OFFSET (r_rax),
+ REG_OFFSET (r_rbx),
+ REG_OFFSET (r_rcx),
+ REG_OFFSET (r_rdx),
+ REG_OFFSET (r_rsi),
+ REG_OFFSET (r_rdi),
+ REG_OFFSET (r_rbp),
+ REG_OFFSET (r_rsp),
+ REG_OFFSET (r_r8),
+ REG_OFFSET (r_r9),
+ REG_OFFSET (r_r10),
+ REG_OFFSET (r_r11),
+ REG_OFFSET (r_r12),
+ REG_OFFSET (r_r13),
+ REG_OFFSET (r_r14),
+ REG_OFFSET (r_r15),
+ REG_OFFSET (r_rip),
+ REG_OFFSET (r_rflags),
+ -1,
+ -1,
+ -1,
+ -1
+};
+
+#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) < X86_64_NUM_GREGS))
+\f
+
+/* Transfering the registers between GDB, inferiors and core files. */
+
+/* Fill GDB's register array with the general-purpose register values
+ in *GREGSETP. */
+
+void
+supply_gregset (gregset_t *gregsetp)
+{
+ int i;
+
+ for (i = 0; i < X86_64_NUM_GREGS; i++)
+ {
+ if (reg_offset[i] == -1)
+ supply_register (i, NULL);
+ else
+ supply_register (i, REG_ADDR (gregsetp, i));
+ }
+}
+
+/* Fill register REGNO (if it is a general-purpose register) in
+ *GREGSETPS with the value in GDB's register array. If REGNO is -1,
+ do this for all registers. */
+
+void
+fill_gregset (gregset_t *gregsetp, int regno)
+{
+ int i;
+
+ for (i = 0; i < X86_64_NUM_GREGS; i++)
+ if ((regno == -1 || regno == i) && reg_offset[i] != -1)
+ regcache_collect (i, REG_ADDR (gregsetp, i));
+}
+
+/* Fill GDB's register array with the floating-point register values
+ in *FPREGSETP. */
+
+void
+supply_fpregset (fpregset_t *fpregsetp)
+{
+ x86_64_supply_fxsave ((char *) fpregsetp);
+}
+
+/* Fill register REGNO (if it is a floating-point register) in
+ *FPREGSETP with the value in GDB's register array. If REGNO is -1,
+ do this for all registers. */
+
+void
+fill_fpregset (fpregset_t *fpregsetp, int regno)
+{
+ x86_64_fill_fxsave ((char *) fpregsetp, regno);
+}
+
+/* Fetch register REGNO from the inferior. If REGNO is -1, do this
+ for all registers (including the floating point registers). */
+
+void
+fetch_inferior_registers (int regno)
+{
+ 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);
+ if (regno != -1)
+ return;
+ }
+
+ if (regno == -1 || regno >= FP0_REGNUM)
+ {
+ fpregset_t fpregs;
+
+ 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). */
+
+void
+store_inferior_registers (int regno)
+{
+ 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");
+
+ 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;
+
+ 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, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
+ perror_with_name ("Couldn't write floating point status");
+ }
+}
+\f
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+void _initialize_amd64fbsd_nat (void);
+
+void
+_initialize_am64fbsd_nat (void)
+{
+ int offset;
+
+ /* 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. */
+
+#define SC_REG_OFFSET amd64fbsd_sc_reg_offset
+
+ /* We only check the program counter, stack pointer and frame
+ pointer since these members of `struct sigcontext' are essential
+ for providing backtraces. */
+
+#define SC_RIP_OFFSET SC_REG_OFFSET[X86_64_RIP_REGNUM]
+#define SC_RSP_OFFSET SC_REG_OFFSET[X86_64_RSP_REGNUM]
+#define SC_RBP_OFFSET SC_REG_OFFSET[X86_64_RBP_REGNUM]
+
+ /* Override the default value for the offset of the program counter
+ in the sigcontext structure. */
+ offset = offsetof (struct sigcontext, sc_rip);
+
+ if (SC_RIP_OFFSET != offset)
+ {
+ warning ("\
+offsetof (struct sigcontext, sc_rip) yields %d instead of %d.\n\
+Please report this to <bug-gdb@gnu.org>.",
+ offset, SC_RIP_OFFSET);
+ }
+
+ SC_RIP_OFFSET = offset;
+
+ /* Likewise for the stack pointer. */
+ offset = offsetof (struct sigcontext, sc_rsp);
+
+ if (SC_RSP_OFFSET != offset)
+ {
+ warning ("\
+offsetof (struct sigcontext, sc_rsp) yields %d instead of %d.\n\
+Please report this to <bug-gdb@gnu.org>.",
+ offset, SC_RSP_OFFSET);
+ }
+
+ SC_RSP_OFFSET = offset;
+
+ /* And the frame pointer. */
+ offset = offsetof (struct sigcontext, sc_rbp);
+
+ if (SC_RBP_OFFSET != offset)
+ {
+ warning ("\
+offsetof (struct sigcontext, sc_rbp) yields %d instead of %d.\n\
+Please report this to <bug-gdb@gnu.org>.",
+ offset, SC_RBP_OFFSET);
+ }
+
+ SC_RBP_OFFSET = offset;
+
+ /* FreeBSD provides a kern.ps_strings sysctl that we can use to
+ locate the sigtramp. That way we can still recognize a sigtramp
+ if its location is changed in a new kernel. Of course this is
+ still based on the assumption that the sigtramp is placed
+ directly under the location where the program arguments and
+ environment can be found. */
+ {
+ int mib[2];
+ int ps_strings;
+ size_t len;
+
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_PS_STRINGS;
+ len = sizeof (ps_strings);
+ if (sysctl (mib, 2, &ps_strings, &len, NULL, 0) == 0)
+ {
+ amd64fbsd_sigtramp_start = ps_strings - 32;
+ amd64fbsd_sigtramp_end = ps_strings;
+ }
+ }
+}
projects / thirdparty / binutils-gdb.git / commitdiff
