/* Target-dependent code for FreeBSD/amd64.
- Copyright 2003 Free Software Foundation, Inc.
+
+ Copyright (C) 2003-2014 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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "arch-utils.h"
#include "regcache.h"
#include "osabi.h"
-#include "gdb_string.h"
-
-#include "x86-64-tdep.h"
+#include "amd64-tdep.h"
+#include "bsd-uthread.h"
+#include "fbsd-tdep.h"
+#include "solib-svr4.h"
/* Support for signal handlers. */
-/* Assuming NEXT_FRAME is for a frame following a BSD sigtramp
- routine, return the address of the associated sigcontext structure. */
+/* Assuming THIS_FRAME is for a BSD sigtramp routine, return the
+ address of the associated sigcontext structure. */
static CORE_ADDR
-amd64fbsd_sigcontext_addr (struct frame_info *next_frame)
+amd64fbsd_sigcontext_addr (struct frame_info *this_frame)
{
CORE_ADDR sp;
/* The `struct sigcontext' (which really is an `ucontext_t' on
FreeBSD/amd64) lives at a fixed offset in the signal frame. See
<machine/sigframe.h>. */
- sp = frame_unwind_register_unsigned (next_frame, X86_64_RSP_REGNUM);
+ sp = frame_unwind_register_unsigned (this_frame, AMD64_RSP_REGNUM);
return sp + 16;
}
\f
/* FreeBSD 5.1-RELEASE or later. */
+/* Mapping between the general-purpose registers in `struct reg'
+ format and GDB's register cache layout.
+
+ Note that some registers are 32-bit, but since we're little-endian
+ we get away with that. */
+
+/* From <machine/reg.h>. */
+static int amd64fbsd_r_reg_offset[] =
+{
+ 14 * 8, /* %rax */
+ 11 * 8, /* %rbx */
+ 13 * 8, /* %rcx */
+ 12 * 8, /* %rdx */
+ 9 * 8, /* %rsi */
+ 8 * 8, /* %rdi */
+ 10 * 8, /* %rbp */
+ 20 * 8, /* %rsp */
+ 7 * 8, /* %r8 ... */
+ 6 * 8,
+ 5 * 8,
+ 4 * 8,
+ 3 * 8,
+ 2 * 8,
+ 1 * 8,
+ 0 * 8, /* ... %r15 */
+ 17 * 8, /* %rip */
+ 19 * 8, /* %eflags */
+ 18 * 8, /* %cs */
+ 21 * 8, /* %ss */
+ -1, /* %ds */
+ -1, /* %es */
+ -1, /* %fs */
+ -1 /* %gs */
+};
+
/* Location of the signal trampoline. */
-CORE_ADDR amd64fbsd_sigtramp_start = 0x7fffffffffc0;
-CORE_ADDR amd64fbsd_sigtramp_end = 0x7fffffffffe0;
+CORE_ADDR amd64fbsd_sigtramp_start_addr = 0x7fffffffffc0ULL;
+CORE_ADDR amd64fbsd_sigtramp_end_addr = 0x7fffffffffe0ULL;
/* From <machine/signal.h>. */
-int amd64fbsd_sc_reg_offset[X86_64_NUM_GREGS] =
+int amd64fbsd_sc_reg_offset[] =
{
24 + 6 * 8, /* %rax */
24 + 7 * 8, /* %rbx */
24 + 1 * 8, /* %rsi */
24 + 0 * 8, /* %rdi */
24 + 8 * 8, /* %rbp */
- 24 + 21 * 8, /* %rsp */
- 24 + 4 * 8, /* %r8 */
- 24 + 5 * 8, /* %r9 */
- 24 + 9 * 8, /* %r10 */
- 24 + 10 * 8, /* %r11 */
- 24 + 11 * 8, /* %r12 */
- 24 + 12 * 8, /* %r13 */
- 24 + 13 * 8, /* %r14 */
- 24 + 14 * 8, /* %r15 */
- 24 + 18 * 8, /* %rip */
- 24 + 20 * 8, /* %eflags */
+ 24 + 22 * 8, /* %rsp */
+ 24 + 4 * 8, /* %r8 ... */
+ 24 + 5 * 8,
+ 24 + 9 * 8,
+ 24 + 10 * 8,
+ 24 + 11 * 8,
+ 24 + 12 * 8,
+ 24 + 13 * 8,
+ 24 + 14 * 8, /* ... %r15 */
+ 24 + 19 * 8, /* %rip */
+ 24 + 21 * 8, /* %eflags */
+ 24 + 20 * 8, /* %cs */
+ 24 + 23 * 8, /* %ss */
-1, /* %ds */
-1, /* %es */
-1, /* %fs */
-1 /* %gs */
};
-void
+/* From /usr/src/lib/libc/amd64/gen/_setjmp.S. */
+static int amd64fbsd_jmp_buf_reg_offset[] =
+{
+ -1, /* %rax */
+ 1 * 8, /* %rbx */
+ -1, /* %rcx */
+ -1, /* %rdx */
+ -1, /* %rsi */
+ -1, /* %rdi */
+ 3 * 8, /* %rbp */
+ 2 * 8, /* %rsp */
+ -1, /* %r8 ... */
+ -1,
+ -1,
+ -1, /* ... %r11 */
+ 4 * 8, /* %r12 ... */
+ 5 * 8,
+ 6 * 8,
+ 7 * 8, /* ... %r15 */
+ 0 * 8 /* %rip */
+};
+
+static void
+amd64fbsd_supply_uthread (struct regcache *regcache,
+ int regnum, CORE_ADDR addr)
+{
+ gdb_byte buf[8];
+ int i;
+
+ gdb_assert (regnum >= -1);
+
+ for (i = 0; i < ARRAY_SIZE (amd64fbsd_jmp_buf_reg_offset); i++)
+ {
+ if (amd64fbsd_jmp_buf_reg_offset[i] != -1
+ && (regnum == -1 || regnum == i))
+ {
+ read_memory (addr + amd64fbsd_jmp_buf_reg_offset[i], buf, 8);
+ regcache_raw_supply (regcache, i, buf);
+ }
+ }
+}
+
+static void
+amd64fbsd_collect_uthread (const struct regcache *regcache,
+ int regnum, CORE_ADDR addr)
+{
+ gdb_byte buf[8];
+ int i;
+
+ gdb_assert (regnum >= -1);
+
+ for (i = 0; i < ARRAY_SIZE (amd64fbsd_jmp_buf_reg_offset); i++)
+ {
+ if (amd64fbsd_jmp_buf_reg_offset[i] != -1
+ && (regnum == -1 || regnum == i))
+ {
+ regcache_raw_collect (regcache, i, buf);
+ write_memory (addr + amd64fbsd_jmp_buf_reg_offset[i], buf, 8);
+ }
+ }
+}
+
+static void
amd64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ /* Generic FreeBSD support. */
+ fbsd_init_abi (info, gdbarch);
+
/* Obviously FreeBSD is BSD-based. */
i386bsd_init_abi (info, gdbarch);
- x86_64_init_abi (info, gdbarch);
+ tdep->gregset_reg_offset = amd64fbsd_r_reg_offset;
+ tdep->gregset_num_regs = ARRAY_SIZE (amd64fbsd_r_reg_offset);
+ tdep->sizeof_gregset = 22 * 8;
- tdep->sigtramp_start = amd64fbsd_sigtramp_start;
- tdep->sigtramp_end = amd64fbsd_sigtramp_end;
+ amd64_init_abi (info, gdbarch);
+
+ tdep->sigtramp_start = amd64fbsd_sigtramp_start_addr;
+ tdep->sigtramp_end = amd64fbsd_sigtramp_end_addr;
tdep->sigcontext_addr = amd64fbsd_sigcontext_addr;
tdep->sc_reg_offset = amd64fbsd_sc_reg_offset;
- tdep->sc_num_regs = X86_64_NUM_GREGS;
+ tdep->sc_num_regs = ARRAY_SIZE (amd64fbsd_sc_reg_offset);
+
+ /* FreeBSD provides a user-level threads implementation. */
+ bsd_uthread_set_supply_uthread (gdbarch, amd64fbsd_supply_uthread);
+ bsd_uthread_set_collect_uthread (gdbarch, amd64fbsd_collect_uthread);
+
+ /* FreeBSD uses SVR4-style shared libraries. */
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, svr4_lp64_fetch_link_map_offsets);
}
\f
projects / platform / upstream / binutils.git / blobdiff