2001-02-10 01:58:38 +01:00
|
|
|
/* s390-dis.c -- Disassemble S390 instructions
|
2015-01-01 15:15:26 +01:00
|
|
|
Copyright (C) 2000-2015 Free Software Foundation, Inc.
|
2001-02-10 01:58:38 +01:00
|
|
|
Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
|
|
|
|
|
2007-07-05 11:49:03 +02:00
|
|
|
This file is part of the GNU opcodes library.
|
2001-02-10 01:58:38 +01:00
|
|
|
|
2007-07-05 11:49:03 +02:00
|
|
|
This library is free software; you can redistribute it and/or modify
|
2001-02-10 01:58:38 +01:00
|
|
|
it under the terms of the GNU General Public License as published by
|
2007-07-05 11:49:03 +02:00
|
|
|
the Free Software Foundation; either version 3, or (at your option)
|
|
|
|
any later version.
|
2001-02-10 01:58:38 +01:00
|
|
|
|
2007-07-05 11:49:03 +02:00
|
|
|
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.
|
2001-02-10 01:58:38 +01:00
|
|
|
|
|
|
|
You should have received a copy of the GNU General Public License
|
2007-07-05 11:49:03 +02:00
|
|
|
along with this file; see the file COPYING. If not, write to the
|
|
|
|
Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
|
|
|
|
MA 02110-1301, USA. */
|
2001-02-10 01:58:38 +01:00
|
|
|
|
2012-05-17 17:13:28 +02:00
|
|
|
#include "sysdep.h"
|
2001-02-10 01:58:38 +01:00
|
|
|
#include <stdio.h>
|
|
|
|
#include "ansidecl.h"
|
|
|
|
#include "dis-asm.h"
|
2008-04-10 15:36:43 +02:00
|
|
|
#include "opintl.h"
|
2001-02-10 01:58:38 +01:00
|
|
|
#include "opcode/s390.h"
|
|
|
|
|
|
|
|
static int init_flag = 0;
|
|
|
|
static int opc_index[256];
|
|
|
|
static int current_arch_mask = 0;
|
|
|
|
|
2001-07-23 15:41:14 +02:00
|
|
|
/* Set up index table for first opcode byte. */
|
|
|
|
|
|
|
|
static void
|
2005-07-01 13:16:33 +02:00
|
|
|
init_disasm (struct disassemble_info *info)
|
2001-02-10 01:58:38 +01:00
|
|
|
{
|
2014-08-19 16:42:13 +02:00
|
|
|
int i;
|
2008-04-10 15:36:43 +02:00
|
|
|
const char *p;
|
2001-02-10 01:58:38 +01:00
|
|
|
|
2001-07-23 15:41:14 +02:00
|
|
|
memset (opc_index, 0, sizeof (opc_index));
|
2014-08-19 16:42:13 +02:00
|
|
|
|
|
|
|
/* Reverse order, such that each opc_index ends up pointing to the
|
|
|
|
first matching entry instead of the last. */
|
|
|
|
for (i = s390_num_opcodes; i--; )
|
|
|
|
opc_index[s390_opcodes[i].opcode[0]] = i;
|
2008-04-10 15:36:43 +02:00
|
|
|
|
|
|
|
for (p = info->disassembler_options; p != NULL; )
|
2001-07-23 15:41:14 +02:00
|
|
|
{
|
2008-04-10 15:36:43 +02:00
|
|
|
if (CONST_STRNEQ (p, "esa"))
|
|
|
|
current_arch_mask = 1 << S390_OPCODE_ESA;
|
|
|
|
else if (CONST_STRNEQ (p, "zarch"))
|
|
|
|
current_arch_mask = 1 << S390_OPCODE_ZARCH;
|
|
|
|
else
|
|
|
|
fprintf (stderr, "Unknown S/390 disassembler option: %s\n", p);
|
|
|
|
|
|
|
|
p = strchr (p, ',');
|
|
|
|
if (p != NULL)
|
|
|
|
p++;
|
2001-07-23 15:41:14 +02:00
|
|
|
}
|
2008-04-10 15:36:43 +02:00
|
|
|
|
|
|
|
if (!current_arch_mask)
|
2013-10-30 18:04:32 +01:00
|
|
|
current_arch_mask = 1 << S390_OPCODE_ZARCH;
|
2008-04-10 15:36:43 +02:00
|
|
|
|
2001-02-10 01:58:38 +01:00
|
|
|
init_flag = 1;
|
|
|
|
}
|
|
|
|
|
2014-08-19 16:42:13 +02:00
|
|
|
/* Derive the length of an instruction from its first byte. */
|
|
|
|
|
|
|
|
static inline int
|
|
|
|
s390_insn_length (const bfd_byte *buffer)
|
|
|
|
{
|
|
|
|
/* 00xxxxxx -> 2, 01xxxxxx/10xxxxxx -> 4, 11xxxxxx -> 6. */
|
|
|
|
return ((buffer[0] >> 6) + 3) & ~1U;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Match the instruction in BUFFER against the given OPCODE, excluding
|
|
|
|
the first byte. */
|
|
|
|
|
|
|
|
static inline int
|
|
|
|
s390_insn_matches_opcode (const bfd_byte *buffer,
|
|
|
|
const struct s390_opcode *opcode)
|
|
|
|
{
|
|
|
|
return (buffer[1] & opcode->mask[1]) == opcode->opcode[1]
|
|
|
|
&& (buffer[2] & opcode->mask[2]) == opcode->opcode[2]
|
|
|
|
&& (buffer[3] & opcode->mask[3]) == opcode->opcode[3]
|
|
|
|
&& (buffer[4] & opcode->mask[4]) == opcode->opcode[4]
|
|
|
|
&& (buffer[5] & opcode->mask[5]) == opcode->opcode[5];
|
|
|
|
}
|
|
|
|
|
|
|
|
union operand_value
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
unsigned int u;
|
|
|
|
};
|
|
|
|
|
2001-02-10 01:58:38 +01:00
|
|
|
/* Extracts an operand value from an instruction. */
|
2009-09-10 10:47:20 +02:00
|
|
|
/* We do not perform the shift operation for larl-type address
|
|
|
|
operands here since that would lead to an overflow of the 32 bit
|
|
|
|
integer value. Instead the shift operation is done when printing
|
2014-08-19 16:42:13 +02:00
|
|
|
the operand. */
|
2001-02-10 01:58:38 +01:00
|
|
|
|
2014-08-19 16:42:13 +02:00
|
|
|
static inline union operand_value
|
|
|
|
s390_extract_operand (const bfd_byte *insn,
|
|
|
|
const struct s390_operand *operand)
|
2001-02-10 01:58:38 +01:00
|
|
|
{
|
2014-08-19 16:42:13 +02:00
|
|
|
union operand_value ret;
|
2001-02-10 01:58:38 +01:00
|
|
|
unsigned int val;
|
|
|
|
int bits;
|
|
|
|
|
2001-07-23 15:41:14 +02:00
|
|
|
/* Extract fragments of the operand byte for byte. */
|
|
|
|
insn += operand->shift / 8;
|
2001-02-10 01:58:38 +01:00
|
|
|
bits = (operand->shift & 7) + operand->bits;
|
|
|
|
val = 0;
|
2001-07-23 15:41:14 +02:00
|
|
|
do
|
|
|
|
{
|
|
|
|
val <<= 8;
|
|
|
|
val |= (unsigned int) *insn++;
|
|
|
|
bits -= 8;
|
|
|
|
}
|
|
|
|
while (bits > 0);
|
2001-02-10 01:58:38 +01:00
|
|
|
val >>= -bits;
|
2001-07-23 15:41:14 +02:00
|
|
|
val &= ((1U << (operand->bits - 1)) << 1) - 1;
|
|
|
|
|
* s390-dis.c (s390_extract_operand): Add support for long displacements.
* s390-mkopc.c (s390_opcode_cpu_val): Add support for cpu type z990.
* s390-opc.c (D20_20): Add define for 20 bit displacements.
(INSTR_RRF_R0RR, INSTR_RSL_R0RD, INSTR_RSY_RRRD, INSTR_RSY_RURD,
INSTR_RSY_AARD, INSTR_RXY_RRRD, INSTR_RXY_FRRD, INSTR_SIY_URD): Add
new instruction formats.
(MASK_RRF_R0RR, MASK_RSL_R0RD, MASK_RSY_RRRD, MASK_RSY_RURD,
MASK_RSY_AARD, MASK_RXY_RRRD, MASK_RXY_FRRD, MASK_SIY_URD): Likewise.
(s390_opformats): Likewise.
* s390-opc.txt: Add new instructions for cpu type z990. Add missing
hfp instructions. Add missing instructions pgin, pgout and xsch.
2003-07-01 16:47:58 +02:00
|
|
|
/* Check for special long displacement case. */
|
|
|
|
if (operand->bits == 20 && operand->shift == 20)
|
|
|
|
val = (val & 0xff) << 12 | (val & 0xfff00) >> 8;
|
|
|
|
|
2014-08-19 16:42:13 +02:00
|
|
|
/* Sign extend value if the operand is signed or pc relative. Avoid
|
|
|
|
integer overflows. */
|
|
|
|
if (operand->flags & (S390_OPERAND_SIGNED | S390_OPERAND_PCREL))
|
|
|
|
{
|
|
|
|
unsigned int m = 1U << (operand->bits - 1);
|
|
|
|
|
|
|
|
if (val >= m)
|
|
|
|
ret.i = (int) (val - m) - 1 - (int) (m - 1U);
|
|
|
|
else
|
|
|
|
ret.i = (int) val;
|
|
|
|
}
|
|
|
|
else if (operand->flags & S390_OPERAND_LENGTH)
|
|
|
|
/* Length x in an instruction has real length x + 1. */
|
|
|
|
ret.u = val + 1;
|
|
|
|
else
|
|
|
|
ret.u = val;
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Print the S390 instruction in BUFFER, assuming that it matches the
|
|
|
|
given OPCODE. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
s390_print_insn_with_opcode (bfd_vma memaddr,
|
|
|
|
struct disassemble_info *info,
|
|
|
|
const bfd_byte *buffer,
|
|
|
|
const struct s390_opcode *opcode)
|
|
|
|
{
|
|
|
|
const unsigned char *opindex;
|
|
|
|
char separator;
|
|
|
|
|
|
|
|
/* Mnemonic. */
|
|
|
|
info->fprintf_func (info->stream, "%s", opcode->name);
|
|
|
|
|
|
|
|
/* Operands. */
|
|
|
|
separator = '\t';
|
|
|
|
for (opindex = opcode->operands; *opindex != 0; opindex++)
|
|
|
|
{
|
|
|
|
const struct s390_operand *operand = s390_operands + *opindex;
|
|
|
|
union operand_value val = s390_extract_operand (buffer, operand);
|
|
|
|
unsigned long flags = operand->flags;
|
|
|
|
|
|
|
|
if ((flags & S390_OPERAND_INDEX) && val.u == 0)
|
|
|
|
continue;
|
|
|
|
if ((flags & S390_OPERAND_BASE) &&
|
|
|
|
val.u == 0 && separator == '(')
|
|
|
|
{
|
|
|
|
separator = ',';
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
info->fprintf_func (info->stream, "%c", separator);
|
|
|
|
|
|
|
|
if (flags & S390_OPERAND_GPR)
|
|
|
|
info->fprintf_func (info->stream, "%%r%u", val.u);
|
|
|
|
else if (flags & S390_OPERAND_FPR)
|
|
|
|
info->fprintf_func (info->stream, "%%f%u", val.u);
|
|
|
|
else if (flags & S390_OPERAND_AR)
|
|
|
|
info->fprintf_func (info->stream, "%%a%u", val.u);
|
|
|
|
else if (flags & S390_OPERAND_CR)
|
|
|
|
info->fprintf_func (info->stream, "%%c%u", val.u);
|
|
|
|
else if (flags & S390_OPERAND_PCREL)
|
|
|
|
info->print_address_func (memaddr + val.i + val.i, info);
|
|
|
|
else if (flags & S390_OPERAND_SIGNED)
|
|
|
|
info->fprintf_func (info->stream, "%i", val.i);
|
|
|
|
else
|
|
|
|
info->fprintf_func (info->stream, "%u", val.u);
|
|
|
|
|
|
|
|
if (flags & S390_OPERAND_DISP)
|
|
|
|
separator = '(';
|
|
|
|
else if (flags & S390_OPERAND_BASE)
|
|
|
|
{
|
|
|
|
info->fprintf_func (info->stream, ")");
|
|
|
|
separator = ',';
|
|
|
|
}
|
|
|
|
else
|
|
|
|
separator = ',';
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Check whether opcode A's mask is more specific than that of B. */
|
2001-07-23 15:41:14 +02:00
|
|
|
|
2014-08-19 16:42:13 +02:00
|
|
|
static int
|
|
|
|
opcode_mask_more_specific (const struct s390_opcode *a,
|
|
|
|
const struct s390_opcode *b)
|
|
|
|
{
|
|
|
|
return (((int) a->mask[0] + a->mask[1] + a->mask[2]
|
|
|
|
+ a->mask[3] + a->mask[4] + a->mask[5])
|
|
|
|
> ((int) b->mask[0] + b->mask[1] + b->mask[2]
|
|
|
|
+ b->mask[3] + b->mask[4] + b->mask[5]));
|
2001-02-10 01:58:38 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Print a S390 instruction. */
|
|
|
|
|
|
|
|
int
|
2005-07-01 13:16:33 +02:00
|
|
|
print_insn_s390 (bfd_vma memaddr, struct disassemble_info *info)
|
2001-02-10 01:58:38 +01:00
|
|
|
{
|
|
|
|
bfd_byte buffer[6];
|
2014-08-19 16:42:13 +02:00
|
|
|
const struct s390_opcode *opcode = NULL;
|
2001-02-10 01:58:38 +01:00
|
|
|
unsigned int value;
|
|
|
|
int status, opsize, bufsize;
|
|
|
|
|
|
|
|
if (init_flag == 0)
|
2001-07-23 15:41:14 +02:00
|
|
|
init_disasm (info);
|
2001-02-10 01:58:38 +01:00
|
|
|
|
|
|
|
/* The output looks better if we put 6 bytes on a line. */
|
|
|
|
info->bytes_per_line = 6;
|
|
|
|
|
|
|
|
/* Every S390 instruction is max 6 bytes long. */
|
2001-07-23 15:41:14 +02:00
|
|
|
memset (buffer, 0, 6);
|
2014-08-19 16:42:13 +02:00
|
|
|
status = info->read_memory_func (memaddr, buffer, 6, info);
|
2001-07-23 15:41:14 +02:00
|
|
|
if (status != 0)
|
|
|
|
{
|
|
|
|
for (bufsize = 0; bufsize < 6; bufsize++)
|
2014-08-19 16:42:13 +02:00
|
|
|
if (info->read_memory_func (memaddr, buffer, bufsize + 1, info) != 0)
|
2001-07-23 15:41:14 +02:00
|
|
|
break;
|
|
|
|
if (bufsize <= 0)
|
|
|
|
{
|
2014-08-19 16:42:13 +02:00
|
|
|
info->memory_error_func (status, memaddr, info);
|
2001-07-23 15:41:14 +02:00
|
|
|
return -1;
|
|
|
|
}
|
2014-08-19 16:42:13 +02:00
|
|
|
opsize = s390_insn_length (buffer);
|
2001-07-23 15:41:14 +02:00
|
|
|
status = opsize > bufsize;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
bufsize = 6;
|
2014-08-19 16:42:13 +02:00
|
|
|
opsize = s390_insn_length (buffer);
|
2001-07-23 15:41:14 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
if (status == 0)
|
|
|
|
{
|
2010-09-27 15:33:00 +02:00
|
|
|
const struct s390_opcode *op;
|
|
|
|
|
2014-08-19 16:42:13 +02:00
|
|
|
/* Find the "best match" in the opcode table. */
|
|
|
|
for (op = s390_opcodes + opc_index[buffer[0]];
|
|
|
|
op != s390_opcodes + s390_num_opcodes
|
|
|
|
&& op->opcode[0] == buffer[0];
|
|
|
|
op++)
|
2001-07-23 15:41:14 +02:00
|
|
|
{
|
2014-08-19 16:42:13 +02:00
|
|
|
if ((op->modes & current_arch_mask)
|
|
|
|
&& s390_insn_matches_opcode (buffer, op)
|
|
|
|
&& (opcode == NULL
|
|
|
|
|| opcode_mask_more_specific (op, opcode)))
|
|
|
|
opcode = op;
|
2001-07-23 15:41:14 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-08-19 16:42:13 +02:00
|
|
|
if (opcode != NULL)
|
|
|
|
{
|
|
|
|
/* The instruction is valid. Print it and return its size. */
|
|
|
|
s390_print_insn_with_opcode (memaddr, info, buffer, opcode);
|
|
|
|
return opsize;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Fall back to hex print. */
|
2001-07-23 15:41:14 +02:00
|
|
|
if (bufsize >= 4)
|
|
|
|
{
|
|
|
|
value = (unsigned int) buffer[0];
|
|
|
|
value = (value << 8) + (unsigned int) buffer[1];
|
|
|
|
value = (value << 8) + (unsigned int) buffer[2];
|
|
|
|
value = (value << 8) + (unsigned int) buffer[3];
|
2014-08-19 16:42:13 +02:00
|
|
|
info->fprintf_func (info->stream, ".long\t0x%08x", value);
|
2001-07-23 15:41:14 +02:00
|
|
|
return 4;
|
|
|
|
}
|
|
|
|
else if (bufsize >= 2)
|
|
|
|
{
|
|
|
|
value = (unsigned int) buffer[0];
|
|
|
|
value = (value << 8) + (unsigned int) buffer[1];
|
2014-08-19 16:42:13 +02:00
|
|
|
info->fprintf_func (info->stream, ".short\t0x%04x", value);
|
2001-07-23 15:41:14 +02:00
|
|
|
return 2;
|
2001-02-10 01:58:38 +01:00
|
|
|
}
|
2001-07-23 15:41:14 +02:00
|
|
|
else
|
|
|
|
{
|
|
|
|
value = (unsigned int) buffer[0];
|
2014-08-19 16:42:13 +02:00
|
|
|
info->fprintf_func (info->stream, ".byte\t0x%02x", value);
|
2001-07-23 15:41:14 +02:00
|
|
|
return 1;
|
2001-02-10 01:58:38 +01:00
|
|
|
}
|
|
|
|
}
|
2008-04-10 15:36:43 +02:00
|
|
|
|
|
|
|
void
|
|
|
|
print_s390_disassembler_options (FILE *stream)
|
|
|
|
{
|
|
|
|
fprintf (stream, _("\n\
|
|
|
|
The following S/390 specific disassembler options are supported for use\n\
|
|
|
|
with the -M switch (multiple options should be separated by commas):\n"));
|
|
|
|
|
|
|
|
fprintf (stream, _(" esa Disassemble in ESA architecture mode\n"));
|
|
|
|
fprintf (stream, _(" zarch Disassemble in z/Architecture mode\n"));
|
|
|
|
}
|