/* Print DEC PDP-11 instructions.
- Copyright 2001 Free Software Foundation, Inc.
+ Copyright 2001, 2002, 2004, 2005, 2007 Free Software Foundation, Inc.
-This file 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 file is part of the GNU opcodes library.
-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.
+ This library 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 3, or (at your option)
+ any later version.
-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. */
+ It 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., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
+
+#include "sysdep.h"
#include "dis-asm.h"
#include "opcode/pdp11.h"
#define AFTER_INSTRUCTION "\t"
#define OPERAND_SEPARATOR ", "
-#define JUMP 0x1000 /* flag that this operand is used in a jump */
+#define JUMP 0x1000 /* Flag that this operand is used in a jump. */
#define FPRINTF (*info->fprintf_func)
#define F info->stream
-/* sign-extend a 16-bit number in an int */
+/* Sign-extend a 16-bit number in an int. */
#define SIGN_BITS (8 * sizeof (int) - 16)
#define sign_extend(x) (((x) << SIGN_BITS) >> SIGN_BITS)
-static int read_word PARAMS ((bfd_vma memaddr, int *word,
- disassemble_info *info));
-static void print_signed_octal PARAMS ((int n, disassemble_info *info));
-static void print_reg PARAMS ((int reg, disassemble_info *info));
-static void print_freg PARAMS ((int freg, disassemble_info *info));
-static int print_operand PARAMS ((bfd_vma *memaddr, int code,
- disassemble_info *info));
-int print_insn_pdp11 PARAMS ((bfd_vma memaddr, disassemble_info *info));
-
static int
-read_word (memaddr, word, info)
- bfd_vma memaddr;
- int *word;
- disassemble_info *info;
+read_word (bfd_vma memaddr, int *word, disassemble_info *info)
{
int status;
bfd_byte x[2];
}
static void
-print_signed_octal (n, info)
- int n;
- disassemble_info *info;
+print_signed_octal (int n, disassemble_info *info)
{
if (n < 0)
FPRINTF (F, "-%o", -n);
}
static void
-print_reg (reg, info)
- int reg;
- disassemble_info *info;
+print_reg (int reg, disassemble_info *info)
{
- /* mask off the addressing mode, if any */
+ /* Mask off the addressing mode, if any. */
reg &= 7;
switch (reg)
FPRINTF (F, "r%d", reg); break;
case 6: FPRINTF (F, "sp"); break;
case 7: FPRINTF (F, "pc"); break;
- default: /* error */
+ default: ; /* error */
}
}
static void
-print_freg (freg, info)
- int freg;
- disassemble_info *info;
+print_freg (int freg, disassemble_info *info)
{
FPRINTF (F, "fr%d", freg);
}
static int
-print_operand (memaddr, code, info)
- bfd_vma *memaddr;
- int code;
- disassemble_info *info;
+print_operand (bfd_vma *memaddr, int code, disassemble_info *info)
{
int mode = (code >> 3) & 7;
int reg = code & 7;
if (reg == 7)
{
int data;
+
if (read_word (*memaddr, &data, info) < 0)
return -1;
FPRINTF (F, "$");
if (reg == 7)
{
int address;
+
if (read_word (*memaddr, &address, info) < 0)
return -1;
FPRINTF (F, "*$%o", address);
if (reg == 7)
{
bfd_vma address = *memaddr + sign_extend (disp);
+
+ if (mode == 7)
+ FPRINTF (F, "*");
if (!(code & JUMP))
- FPRINTF (F, "*$");
+ FPRINTF (F, "$");
(*info->print_address_func) (address, info);
}
else
return 0;
}
+static int
+print_foperand (bfd_vma *memaddr, int code, disassemble_info *info)
+{
+ int mode = (code >> 3) & 7;
+ int reg = code & 7;
+
+ if (mode == 0)
+ print_freg (reg, info);
+ else
+ return print_operand (memaddr, code, info);
+
+ return 0;
+}
+
/* Print the PDP-11 instruction at address MEMADDR in debugged memory,
on INFO->STREAM. Returns length of the instruction, in bytes. */
int
-print_insn_pdp11 (memaddr, info)
- bfd_vma memaddr;
- disassemble_info *info;
+print_insn_pdp11 (bfd_vma memaddr, disassemble_info *info)
{
bfd_vma start_memaddr = memaddr;
int opcode;
{
case PDP11_OPCODE_NO_OPS:
FPRINTF (F, OP.name);
- break;
+ goto done;
case PDP11_OPCODE_REG:
FPRINTF (F, OP.name);
FPRINTF (F, AFTER_INSTRUCTION);
print_reg (dst, info);
- break;
+ goto done;
case PDP11_OPCODE_OP:
FPRINTF (F, OP.name);
FPRINTF (F, AFTER_INSTRUCTION);
dst |= JUMP;
if (print_operand (&memaddr, dst, info) < 0)
return -1;
- break;
+ goto done;
+ case PDP11_OPCODE_FOP:
+ FPRINTF (F, OP.name);
+ FPRINTF (F, AFTER_INSTRUCTION);
+ if (strcmp (OP.name, "jmp") == 0)
+ dst |= JUMP;
+ if (print_foperand (&memaddr, dst, info) < 0)
+ return -1;
+ goto done;
case PDP11_OPCODE_REG_OP:
FPRINTF (F, OP.name);
FPRINTF (F, AFTER_INSTRUCTION);
dst |= JUMP;
if (print_operand (&memaddr, dst, info) < 0)
return -1;
- break;
+ goto done;
case PDP11_OPCODE_REG_OP_REV:
FPRINTF (F, OP.name);
FPRINTF (F, AFTER_INSTRUCTION);
return -1;
FPRINTF (F, OPERAND_SEPARATOR);
print_reg (src, info);
- break;
+ goto done;
+ case PDP11_OPCODE_AC_FOP:
+ {
+ int ac = (opcode & 0xe0) >> 6;
+ FPRINTF (F, OP.name);
+ FPRINTF (F, AFTER_INSTRUCTION);
+ print_freg (ac, info);
+ FPRINTF (F, OPERAND_SEPARATOR);
+ if (print_foperand (&memaddr, dst, info) < 0)
+ return -1;
+ goto done;
+ }
+ case PDP11_OPCODE_FOP_AC:
+ {
+ int ac = (opcode & 0xe0) >> 6;
+ FPRINTF (F, OP.name);
+ FPRINTF (F, AFTER_INSTRUCTION);
+ if (print_foperand (&memaddr, dst, info) < 0)
+ return -1;
+ FPRINTF (F, OPERAND_SEPARATOR);
+ print_freg (ac, info);
+ goto done;
+ }
case PDP11_OPCODE_AC_OP:
{
int ac = (opcode & 0xe0) >> 6;
FPRINTF (F, OPERAND_SEPARATOR);
if (print_operand (&memaddr, dst, info) < 0)
return -1;
- break;
+ goto done;
+ }
+ case PDP11_OPCODE_OP_AC:
+ {
+ int ac = (opcode & 0xe0) >> 6;
+ FPRINTF (F, OP.name);
+ FPRINTF (F, AFTER_INSTRUCTION);
+ if (print_operand (&memaddr, dst, info) < 0)
+ return -1;
+ FPRINTF (F, OPERAND_SEPARATOR);
+ print_freg (ac, info);
+ goto done;
}
case PDP11_OPCODE_OP_OP:
FPRINTF (F, OP.name);
FPRINTF (F, OPERAND_SEPARATOR);
if (print_operand (&memaddr, dst, info) < 0)
return -1;
- break;
+ goto done;
case PDP11_OPCODE_DISPL:
{
int displ = (opcode & 0xff) << 8;
FPRINTF (F, OP.name);
FPRINTF (F, AFTER_INSTRUCTION);
(*info->print_address_func) (address, info);
- break;
+ goto done;
}
case PDP11_OPCODE_REG_DISPL:
{
int displ = (opcode & 0x3f) << 10;
- bfd_vma address = memaddr + (sign_extend (displ) >> 9);
+ bfd_vma address = memaddr - (displ >> 9);
+
FPRINTF (F, OP.name);
FPRINTF (F, AFTER_INSTRUCTION);
print_reg (src, info);
FPRINTF (F, OPERAND_SEPARATOR);
(*info->print_address_func) (address, info);
- break;
+ goto done;
}
case PDP11_OPCODE_IMM8:
{
FPRINTF (F, OP.name);
FPRINTF (F, AFTER_INSTRUCTION);
FPRINTF (F, "%o", code);
- break;
+ goto done;
}
case PDP11_OPCODE_IMM6:
{
FPRINTF (F, OP.name);
FPRINTF (F, AFTER_INSTRUCTION);
FPRINTF (F, "%o", code);
- break;
+ goto done;
}
case PDP11_OPCODE_IMM3:
{
FPRINTF (F, OP.name);
FPRINTF (F, AFTER_INSTRUCTION);
FPRINTF (F, "%o", code);
- break;
+ goto done;
+ }
+ case PDP11_OPCODE_ILLEGAL:
+ {
+ FPRINTF (F, ".word");
+ FPRINTF (F, AFTER_INSTRUCTION);
+ FPRINTF (F, "%o", opcode);
+ goto done;
}
default:
/* TODO: is this a proper way of signalling an error? */
}
#undef OP
}
+ done:
return memaddr - start_memaddr;
}
projects / binutils.git / blobdiff