1 files changed, 81 insertions, 0 deletions
diff --git a/contrib/gdb/gdb/i386ly-tdep.c b/contrib/gdb/gdb/i386ly-tdep.c
new file mode 100644
index 0000000..2374b71
--- /dev/null
+++ b/contrib/gdb/gdb/i386ly-tdep.c
@@ -0,0 +1,81 @@
+/* Target-dependent code for Intel 386 running LynxOS.
+   Copyright 1993, 1996, 2000, 2001, 2002, 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 "gdbcore.h"
+#include "inferior.h"
+#include "regcache.h"
+#include "target.h"
+#include "osabi.h"
+
+#include "i386-tdep.h"
+
+/* Return the PC of the caller from the call frame.  Assumes the subr
+   prologue has already been executed, and the frame pointer setup.
+   If this is the outermost frame, we check to see if we are in a
+   system call by examining the previous instruction.  If so, then the
+   return PC is actually at SP+4 because system calls use a different
+   calling sequence.  */
+
+static CORE_ADDR
+i386lynx_saved_pc_after_call (struct frame_info *frame)
+{
+  char opcode[7];
+  static const unsigned char call_inst[] =
+  { 0x9a, 0, 0, 0, 0, 8, 0 };	/* lcall 0x8,0x0 */
+
+  read_memory_nobpt (frame->pc - 7, opcode, 7);
+  if (memcmp (opcode, call_inst, 7) == 0)
+    return read_memory_unsigned_integer (read_register (SP_REGNUM) + 4, 4);
+
+  return read_memory_unsigned_integer (read_register (SP_REGNUM), 4);
+}
+
+
+/* LynxOS.  */
+static void
+i386lynx_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+  set_gdbarch_deprecated_saved_pc_after_call (gdbarch, i386lynx_saved_pc_after_call);
+}
+
+
+static enum gdb_osabi
+i386lynx_coff_osabi_sniffer (bfd *abfd)
+{
+  if (strcmp (bfd_get_target (abfd), "coff-i386-lynx") == 0)
+    return GDB_OSABI_LYNXOS;
+
+  return GDB_OSABI_UNKNOWN;
+}
+
+
+/* Provide a prototype to silence -Wmissing-prototypes.  */
+void _initialize_i386lynx_tdep (void);
+
+void
+_initialize_i386lynx_tdep (void)
+{
+  gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour,
+				  i386lynx_coff_osabi_sniffer);
+
+  gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_LYNXOS,
+			  i386lynx_init_abi);
+}