/* Print NS 32000 instructions for GDB, the GNU debugger.
- Copyright 1986, 1988, 1991, 1992, 1994, 1995
+ Copyright 1986, 1988, 1991, 1992, 1994, 1995, 1998, 1999, 2000, 2001
Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "frame.h"
+#include "gdbcore.h"
+
+static int sign_extend (int value, int bits);
void
_initialize_ns32k_tdep (void)
/* Advance PC across any function entry prologue instructions
to reach some "real" code. */
-CORE_ADDR
-merlin_skip_prologue (CORE_ADDR pc)
-{
- register int op = read_memory_integer (pc, 1);
- if (op == 0x82)
- {
- op = read_memory_integer (pc + 2, 1);
- if ((op & 0x80) == 0)
- pc += 3;
- else if ((op & 0xc0) == 0x80)
- pc += 4;
- else
- pc += 6;
- }
- return pc;
-}
-
CORE_ADDR
umax_skip_prologue (CORE_ADDR pc)
{
return pc;
}
-/* Return number of args passed to a frame.
- Can return -1, meaning no way to tell. */
-
-int
-merlin_frame_num_args (struct frame_info *fi)
-{
- int numargs;
- CORE_ADDR pc;
- int insn;
- int addr_mode;
- int width;
-
- pc = FRAME_SAVED_PC (fi);
- insn = read_memory_integer (pc, 2);
- addr_mode = (insn >> 11) & 0x1f;
- insn = insn & 0x7ff;
- if ((insn & 0x7fc) == 0x57c
- && addr_mode == 0x14) /* immediate */
- {
- if (insn == 0x57c) /* adjspb */
- width = 1;
- else if (insn == 0x57d) /* adjspw */
- width = 2;
- else if (insn == 0x57f) /* adjspd */
- width = 4;
- numargs = read_memory_integer (pc + 2, width);
- if (width > 1)
- flip_bytes (&numargs, width);
- numargs = -sign_extend (numargs, width * 8) / 4;
- }
- else
- numargs = -1;
- return numargs;
-}
-
-
/* Return number of args passed to a frame.
Can return -1, meaning no way to tell.
Encore's C compiler often reuses same area on stack for args,
so this will often not work properly. If the arg names
are known, it's likely most of them will be printed. */
+
int
umax_frame_num_args (struct frame_info *fi)
{
width = 2;
else if (insn == 0x57f) /* adjspd */
width = 4;
+ else
+ internal_error (__FILE__, __LINE__, "bad else");
numargs = read_memory_integer (pc + 2, width);
if (width > 1)
flip_bytes (&numargs, width);
return numargs;
}
-
+static int
sign_extend (int value, int bits)
{
value = value & ((1 << bits) - 1);
}
void
-flip_bytes (char *ptr, int count)
+flip_bytes (void *p, int count)
{
char tmp;
+ char *ptr = 0;
while (count > 0)
{