73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/* Print VAX instructions for GDB, the GNU debugger.
|
|
Copyright 1986, 1989, 1991, 1992, 1996 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 "symtab.h"
|
|
#include "gdbcore.h"
|
|
#include "frame.h"
|
|
#include "value.h"
|
|
#include "opcode/vax.h"
|
|
|
|
/* Advance PC across any function entry prologue instructions
|
|
to reach some "real" code. */
|
|
|
|
CORE_ADDR
|
|
vax_skip_prologue (pc)
|
|
CORE_ADDR pc;
|
|
{
|
|
register int op = (unsigned char) read_memory_integer (pc, 1);
|
|
if (op == 0x11)
|
|
pc += 2; /* skip brb */
|
|
if (op == 0x31)
|
|
pc += 3; /* skip brw */
|
|
if (op == 0xC2
|
|
&& ((unsigned char) read_memory_integer (pc + 2, 1)) == 0x5E)
|
|
pc += 3; /* skip subl2 */
|
|
if (op == 0x9E
|
|
&& ((unsigned char) read_memory_integer (pc + 1, 1)) == 0xAE
|
|
&& ((unsigned char) read_memory_integer (pc + 3, 1)) == 0x5E)
|
|
pc += 4; /* skip movab */
|
|
if (op == 0x9E
|
|
&& ((unsigned char) read_memory_integer (pc + 1, 1)) == 0xCE
|
|
&& ((unsigned char) read_memory_integer (pc + 4, 1)) == 0x5E)
|
|
pc += 5; /* skip movab */
|
|
if (op == 0x9E
|
|
&& ((unsigned char) read_memory_integer (pc + 1, 1)) == 0xEE
|
|
&& ((unsigned char) read_memory_integer (pc + 6, 1)) == 0x5E)
|
|
pc += 7; /* skip movab */
|
|
return pc;
|
|
}
|
|
|
|
/* Return number of args passed to a frame.
|
|
Can return -1, meaning no way to tell. */
|
|
|
|
int
|
|
vax_frame_num_args (fi)
|
|
struct frame_info *fi;
|
|
{
|
|
return (0xff & read_memory_integer (FRAME_ARGS_ADDRESS (fi), 1));
|
|
}
|
|
|
|
void
|
|
_initialize_vax_tdep ()
|
|
{
|
|
tm_print_insn = print_insn_vax;
|
|
}
|