/* 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.
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
+/* 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);
+ deprecated_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_deprecated_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);
}