--- /dev/null
+/* Native-dependent code for OpenBSD/amd64.
+
+ Copyright 2003, 2004 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 "gdb_assert.h"
+
+#include "x86-64-tdep.h"
+#include "amd64-nat.h"
+
+/* Mapping between the general-purpose registers in OpenBSD/amd64
+ `struct reg' format and GDB's register cache layout for
+ OpenBSD/i386.
+
+ Note that most (if not all) OpenBSD/amd64 registers are 64-bit,
+ while the OpenBSD/i386 registers are all 32-bit, but since we're
+ little-endian we get away with that. */
+
+/* From <machine/reg.h>. */
+static int amd64obsd32_r_reg_offset[] =
+{
+ 14 * 8, /* %eax */
+ 3 * 8, /* %ecx */
+ 2 * 8, /* %edx */
+ 13 * 8, /* %ebx */
+ 15 * 8, /* %esp */
+ 12 * 8, /* %ebp */
+ 1 * 8, /* %esi */
+ 0 * 8, /* %edi */
+ 16 * 8, /* %eip */
+ 17 * 8, /* %eflags */
+ 18 * 8, /* %cs */
+ 19 * 8, /* %ss */
+ 20 * 8, /* %ds */
+ 21 * 8, /* %es */
+ 22 * 8, /* %fs */
+ 23 * 8 /* %gs */
+};
+\f
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+void _initialize_amd64obsd_nat (void);
+
+void
+_initialize_amd64obsd_nat (void)
+{
+ amd64_native_gregset32_reg_offset = amd64obsd32_r_reg_offset;
+ amd64_native_gregset32_num_regs = ARRAY_SIZE (amd64obsd32_r_reg_offset);
+ amd64_native_gregset64_reg_offset = amd64obsd_r_reg_offset;
+}
--- /dev/null
+/* Target-dependent code for OpenBSD/amd64.
+
+ Copyright 2003, 2004 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 "frame.h"
+#include "gdbcore.h"
+#include "osabi.h"
+#include "target.h"
+
+#include "gdb_assert.h"
+#include "gdb_string.h"
+
+#include "x86-64-tdep.h"
+
+/* Support for signal handlers. */
+
+static const int amd64obsd_page_size = 4096;
+
+static int
+amd64obsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
+{
+ CORE_ADDR start_pc = (pc & ~(amd64obsd_page_size - 1));
+ const char sigreturn[] =
+ {
+ 0x48, 0xc7, 0xc0,
+ 0x67, 0x00, 0x00, 0x00, /* movq $SYS_sigreturn, %rax */
+ 0x0f, 0x05 /* syscall */
+ };
+ char *buf;
+
+ if (name)
+ return 0;
+
+ /* If we can't read the instructions at START_PC, return zero. */
+ buf = alloca (sizeof sigreturn);
+ if (target_read_memory (start_pc + 0x7, buf, sizeof sigreturn))
+ return 0;
+
+ /* Check for sigreturn(2). */
+ if (memcmp (buf, sigreturn, sizeof sigreturn))
+ return 0;
+
+ return 1;
+}
+
+/* Assuming NEXT_FRAME is for a frame following a BSD sigtramp
+ routine, return the address of the associated sigcontext structure. */
+
+static CORE_ADDR
+amd64obsd_sigcontext_addr (struct frame_info *next_frame)
+{
+ /* The %rsp register points at `struct sigcontext' upon entry of a
+ signal trampoline. */
+ return frame_unwind_register_unsigned (next_frame, X86_64_RSP_REGNUM);
+}
+\f
+/* OpenBSD 3.5 or later. */
+
+/* Mapping between the general-purpose registers in `struct reg'
+ format and GDB's register cache layout. */
+
+/* From <machine/reg.h>. Used for ptrace(2), but not for core dumps. */
+int amd64obsd_r_reg_offset[] =
+{
+ 14 * 8, /* %rax */
+ 13 * 8, /* %rbx */
+ 3 * 8, /* %rcx */
+ 2 * 8, /* %rdx */
+ 1 * 8, /* %rsi */
+ 0 * 8, /* %rdi */
+ 12 * 8, /* %rbp */
+ 15 * 8, /* %rsp */
+ 4 * 8, /* %r8 .. */
+ 5 * 8,
+ 6 * 8,
+ 7 * 8,
+ 8 * 8,
+ 9 * 8,
+ 10 * 8,
+ 11 * 8, /* ... %r15 */
+ 16 * 8, /* %rip */
+ 17 * 8, /* %eflags */
+ 18 * 8, /* %cs */
+ 19 * 8, /* %ss */
+ 20 * 8, /* %ds */
+ 21 * 8, /* %es */
+ 22 * 8, /* %fs */
+ 23 * 8 /* %gs */
+};
+
+/* From <machine/signal.h>. Also used for core dumps. */
+static int amd64obsd_sc_reg_offset[] =
+{
+ 14 * 8, /* %rax */
+ 13 * 8, /* %rbx */
+ 3 * 8, /* %rcx */
+ 2 * 8, /* %rdx */
+ 1 * 8, /* %rsi */
+ 0 * 8, /* %rdi */
+ 12 * 8, /* %rbp */
+ 24 * 8, /* %rsp */
+ 4 * 8, /* %r8 ... */
+ 5 * 8,
+ 6 * 8,
+ 7 * 8,
+ 8 * 8,
+ 9 * 8,
+ 10 * 8,
+ 11 * 8, /* ... %r15 */
+ 21 * 8, /* %rip */
+ 23 * 8, /* %eflags */
+ 22 * 8, /* %cs */
+ 25 * 8, /* %ss */
+ 18 * 8, /* %ds */
+ 17 * 8, /* %es */
+ 16 * 8, /* %fs */
+ 15 * 8 /* %gs */
+};
+
+static void
+amd64obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ /* Initialize general-purpose register set details first. */
+ tdep->gregset_reg_offset = amd64obsd_sc_reg_offset;
+ tdep->gregset_num_regs = ARRAY_SIZE (amd64obsd_sc_reg_offset);
+ tdep->sizeof_gregset = 26 * 8;
+
+ x86_64_init_abi (info, gdbarch);
+
+ tdep->jb_pc_offset = 7 * 8;
+
+ set_gdbarch_pc_in_sigtramp (gdbarch, amd64obsd_pc_in_sigtramp);
+ tdep->sigcontext_addr = amd64obsd_sigcontext_addr;
+ tdep->sc_reg_offset = amd64obsd_sc_reg_offset;
+ tdep->sc_num_regs = ARRAY_SIZE (amd64obsd_sc_reg_offset);
+}
+\f
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+void _initialize_amd64obsd_tdep (void);
+
+void
+_initialize_amd64obsd_ndep (void)
+{
+ /* The OpenBSD/amd64 native dependent code makes this assumption. */
+ gdb_assert (ARRAY_SIZE (amd64obsd_r_reg_offset) == X86_64_NUM_GREGS);
+
+ gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
+ GDB_OSABI_OPENBSD_ELF, amd64obsd_init_abi);
+}
projects / external / binutils.git / commitdiff