* config/i386/x86-64linux.mh: New file.

* config/i386/x86-64linux.mt: New file.
* config/i386/nm-x86_64.h: New file.
* x86-64-linux-tdep.c: New file.
* x86-64-linux-nat.c: New file.
* x86-64-tdep.c: New file.
* x86-64-tdep.h: New file.
* config/djgpp/fnchange.lst: Add entries for x86_64-linux-tdep.c
and x86_64-linux-nat.c
* Makefile.in: Add x86_64-linux-tdep.o, x86_64-tdep.o,
x86_64-linux-tdep.o, x86_64-nat.o, update dependencies.

1 files changed, 136 insertions, 0 deletions

diff --git a/gdb/x86-64-linux-tdep.c b/gdb/x86-64-linux-tdep.c
new file mode 100644
index 0000000..7a1a045
--- /dev/null
+++ b/gdb/x86-64-linux-tdep.c
@@ -0,0 +1,136 @@
+/* Target-dependent code for Linux running on x86-64, for GDB.
+   Copyright 2001
+   Free Software Foundation, Inc.
+   Contributed by Jiri Smid, SuSE Labs.
+
+   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 "gdbcore.h"
+#include "regcache.h"
+#include "x86-64-tdep.h"
+#include "dwarf2cfi.h"
+
+#define STRUCT_OFFSET(struct_type, member)    \
+    ((long) ((char*) &((struct_type*) 0)->member))
+
+#define LINUX_SIGTRAMP_INSN0 (0x48)	/* mov $NNNNNNNN,%rax */
+#define LINUX_SIGTRAMP_OFFSET0 (0)
+#define LINUX_SIGTRAMP_INSN1 (0x0f)	/* syscall */
+#define LINUX_SIGTRAMP_OFFSET1 (7)
+
+static const unsigned char linux_sigtramp_code[] = {
+  LINUX_SIGTRAMP_INSN0, 0xc7, 0xc0, 0x89, 0x00, 0x00, 0x00,	/*  mov $0x89,%rax */
+  LINUX_SIGTRAMP_INSN1, 0x05	/* syscall */
+};
+
+#define LINUX_SIGTRAMP_LEN (sizeof linux_sigtramp_code)
+
+/* If PC is in a sigtramp routine, return the address of the start of
+   the routine.  Otherwise, return 0.  */
+
+static CORE_ADDR
+x86_64_linux_sigtramp_start (CORE_ADDR pc)
+{
+  unsigned char buf[LINUX_SIGTRAMP_LEN];
+  if (read_memory_nobpt (pc, (char *) buf, LINUX_SIGTRAMP_LEN) != 0)
+    return 0;
+
+  if (buf[0] != LINUX_SIGTRAMP_INSN0)
+    {
+      if (buf[0] != LINUX_SIGTRAMP_INSN1)
+	return 0;
+
+      pc -= LINUX_SIGTRAMP_OFFSET1;
+
+      if (read_memory_nobpt (pc, (char *) buf, LINUX_SIGTRAMP_LEN) != 0)
+	return 0;
+    }
+
+  if (memcmp (buf, linux_sigtramp_code, LINUX_SIGTRAMP_LEN) != 0)
+    return 0;
+
+  return pc;
+}
+
+/* Offset to struct sigcontext in ucontext, from <asm/ucontext.h>.  */
+#define LINUX_UCONTEXT_SIGCONTEXT_OFFSET (36)
+
+/* Assuming FRAME is for a Linux sigtramp routine, return the address
+   of the associated sigcontext structure.  */
+CORE_ADDR
+x86_64_linux_sigcontext_addr (struct frame_info *frame)
+{
+  CORE_ADDR pc;
+
+  pc = x86_64_linux_sigtramp_start (frame->pc);
+  if (pc)
+    {
+      if (frame->next)
+	/* If this isn't the top frame, the next frame must be for the
+	   signal handler itself.  The sigcontext structure is part of
+	   the user context. */
+	return frame->next->frame + sizeof (struct siginfo) +
+	  LINUX_UCONTEXT_SIGCONTEXT_OFFSET;
+
+
+      /* This is the top frame. */
+      return read_register (SP_REGNUM) + sizeof (struct siginfo) +
+	LINUX_UCONTEXT_SIGCONTEXT_OFFSET;
+
+    }
+
+  error ("Couldn't recognize signal trampoline.");
+  return 0;
+}
+
+/* Offset to saved PC in sigcontext, from <asm/sigcontext.h>.  */
+#define LINUX_SIGCONTEXT_PC_OFFSET (136)
+
+/* Assuming FRAME is for a Linux sigtramp routine, return the saved
+   program counter.  */
+
+CORE_ADDR
+x86_64_linux_sigtramp_saved_pc (struct frame_info *frame)
+{
+  CORE_ADDR addr;
+
+  addr = x86_64_linux_sigcontext_addr (frame);
+  return read_memory_integer (addr + LINUX_SIGCONTEXT_PC_OFFSET, 8);
+}
+
+/* Immediately after a function call, return the saved pc.  */
+
+CORE_ADDR
+x86_64_linux_saved_pc_after_call (struct frame_info *frame)
+{
+  if (frame->signal_handler_caller)
+    return x86_64_linux_sigtramp_saved_pc (frame);
+
+  return read_memory_integer (read_register (SP_REGNUM), 8);
+}
+
+/* Saved Pc.  Get it from sigcontext if within sigtramp.  */
+CORE_ADDR
+x86_64_linux_frame_saved_pc (struct frame_info *frame)
+{
+  if (frame->signal_handler_caller)
+    return x86_64_linux_sigtramp_saved_pc (frame);
+  return cfi_get_ra (frame);
+}