* libtool.m4 (LD): Append -melf* option to LD on IRIX with GNU ld.

[deliverable/binutils-gdb.git] / gdb / i386ly-tdep.c

diff --git a/gdb/i386ly-tdep.c b/gdb/i386ly-tdep.c
index 1b011212824983a7327b5569c4e575b703b5d35b..d0775b7643727d5c3474c843c7f9a3145669026b 100644 (file)
--- a/gdb/i386ly-tdep.c
+++ b/gdb/i386ly-tdep.c
@@ -1,5 +1,5 @@
 /* Target-dependent code for Intel 386 running LynxOS.
-   Copyright 1993 Free Software Foundation, Inc.
+   Copyright 1993, 1996, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -19,27 +19,63 @@
    Boston, MA 02111-1307, USA.  */
 
 #include "defs.h"
+#include "gdbcore.h"
 #include "inferior.h"
+#include "regcache.h"
 #include "target.h"
-#include "gdbcore.h"
+#include "osabi.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.  */
+#include "i386-tdep.h"
 
-CORE_ADDR
-i386lynx_saved_pc_after_call (frame)
-     struct frame_info *frame;
+/* 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 */
+  { 0x9a, 0, 0, 0, 0, 8, 0 };  /* lcall 0x8,0x0 */
 
-  read_memory (frame->pc - 7, opcode, 7);
+  read_memory_nobpt (frame->pc - 7, opcode, 7);
   if (memcmp (opcode, call_inst, 7) == 0)
-    return read_memory_integer (read_register (SP_REGNUM) + 4, 4);
+    return read_memory_unsigned_integer (read_register (SP_REGNUM) + 4, 4);
+
+  return read_memory_unsigned_integer (read_register (SP_REGNUM), 4);
+}
+\f
+
+/* LynxOS.  */
+static void
+i386lynx_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+  set_gdbarch_saved_pc_after_call (gdbarch, i386lynx_saved_pc_after_call);
+}
+\f
+
+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;
+}
+
+\f
+/* 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);
 
-  return read_memory_integer (read_register (SP_REGNUM), 4);
+  gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_LYNXOS,
+                         i386lynx_init_abi);
 }