GDB 6.1 (excluding .info files)

1 files changed, 224 insertions, 0 deletions

diff --git a/gnu/usr.bin/binutils/gdb/amd64obsd-tdep.c b/gnu/usr.bin/binutils/gdb/amd64obsd-tdep.c
new file mode 100644
index 00000000000..198c87e4a28
--- /dev/null
+++ b/gnu/usr.bin/binutils/gdb/amd64obsd-tdep.c
@@ -0,0 +1,224 @@
+/* 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 "regset.h"
+#include "target.h"
+
+#include "gdb_assert.h"
+#include "gdb_string.h"
+
+#include "amd64-tdep.h"
+#include "i387-tdep.h"
+#include "solib-svr4.h"
+
+/* Support for core dumps.  */
+
+static void
+amd64obsd_supply_regset (const struct regset *regset,
+			 struct regcache *regcache, int regnum,
+			 const void *regs, size_t len)
+{
+  const struct gdbarch_tdep *tdep = regset->descr;
+
+  gdb_assert (len >= tdep->sizeof_gregset + I387_SIZEOF_FXSAVE);
+
+  i386_supply_gregset (regset, regcache, regnum, regs, tdep->sizeof_gregset);
+  amd64_supply_fxsave (regcache, regnum, (char *)regs + tdep->sizeof_gregset);
+}
+
+static const struct regset *
+amd64obsd_regset_from_core_section (struct gdbarch *gdbarch,
+				    const char *sect_name, size_t sect_size)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+  /* OpenBSD core dumps don't use seperate register sets for the
+     general-purpose and floating-point registers.  */
+
+  if (strcmp (sect_name, ".reg") == 0
+      && sect_size >= tdep->sizeof_gregset + I387_SIZEOF_FXSAVE)
+    {
+      if (tdep->gregset == NULL)
+	{
+	  tdep->gregset = XMALLOC (struct regset);
+	  tdep->gregset->descr = tdep;
+	  tdep->gregset->supply_regset = amd64obsd_supply_regset;
+	}
+      return tdep->gregset;
+    }
+
+  return NULL;
+}
+
+
+/* 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 */
+    0xcd, 0x80			/* int $0x80 */
+  };
+  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, AMD64_RSP_REGNUM);
+}
+
+/* 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>.  */
+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>.  */
+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);
+
+  amd64_init_abi (info, gdbarch);
+
+  /* Initialize general-purpose register set details.  */
+  tdep->gregset_reg_offset = amd64obsd_r_reg_offset;
+  tdep->gregset_num_regs = ARRAY_SIZE (amd64obsd_r_reg_offset);
+  tdep->sizeof_gregset = 24 * 8;
+
+  set_gdbarch_regset_from_core_section (gdbarch,
+					amd64obsd_regset_from_core_section);
+
+  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);
+
+  /* OpenBSD uses SVR4-style shared libraries.  */
+  set_solib_svr4_fetch_link_map_offsets
+    (gdbarch, svr4_lp64_fetch_link_map_offsets);
+}
+
+
+/* Provide a prototype to silence -Wmissing-prototypes.  */
+void _initialize_amd64obsd_tdep (void);
+
+void
+_initialize_amd64obsd_tdep (void)
+{
+  /* The OpenBSD/amd64 native dependent code makes this assumption.  */
+  gdb_assert (ARRAY_SIZE (amd64obsd_r_reg_offset) == AMD64_NUM_GREGS);
+
+  gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
+			  GDB_OSABI_OPENBSD_ELF, amd64obsd_init_abi);
+
+  /* OpenBSD uses traditional (a.out) NetBSD-style core dumps.  */
+  gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
+			  GDB_OSABI_NETBSD_AOUT, amd64obsd_init_abi);
+}