mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-30 21:44:19 +08:00
322 lines
8.4 KiB
C
322 lines
8.4 KiB
C
|
/* Print instructions for the Motorola 88000, for GDB and GNU Binutils.
|
|||
|
|
Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1993
|
|||
|
|
Free Software Foundation, Inc.
|
|||
|
|
Contributed by Data General Corporation, November 1989.
|
|||
|
|
Partially derived from an earlier printcmd.c.
|
|||
|
|
|
|||
|
|
This file is part of GDB and the GNU Binutils.
|
|||
|
|
|
|||
|
|
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|||
|
|
|
|||
|
|
#include "dis-asm.h"
|
|||
|
|
#include "opcode/m88k.h"
|
|||
|
|
|
|||
|
|
/* FIXME: Uses the internal bfd swapping routines. */
|
|||
|
|
#include "libbfd.h"
|
|||
|
|
|
|||
|
|
INSTAB *hashtable[HASHVAL] = {0};
|
|||
|
|
|
|||
|
|
static int
|
|||
|
|
m88kdis PARAMS ((bfd_vma, unsigned long, struct disassemble_info *));
|
|||
|
|
|
|||
|
|
static void
|
|||
|
|
printop PARAMS ((struct disassemble_info *, OPSPEC *,
|
|||
|
|
unsigned long, bfd_vma, int));
|
|||
|
|
|
|||
|
|
static void
|
|||
|
|
init_disasm PARAMS ((void));
|
|||
|
|
|
|||
|
|
static void
|
|||
|
|
install PARAMS ((INSTAB *instptr));
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* Disassemble an M88000 Instruction
|
|||
|
|
*
|
|||
|
|
*
|
|||
|
|
* This module decodes the instruction at memaddr.
|
|||
|
|
*
|
|||
|
|
* Revision History
|
|||
|
|
*
|
|||
|
|
* Revision 1.0 11/08/85 Creation date by Motorola
|
|||
|
|
* 05/11/89 R. Trawick adapted to GDB interface.
|
|||
|
|
* 07/12/93 Ian Lance Taylor updated to
|
|||
|
|
* binutils interface.
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
int
|
|||
|
|
print_insn_m88k (memaddr, info)
|
|||
|
|
bfd_vma memaddr;
|
|||
|
|
struct disassemble_info *info;
|
|||
|
|
{
|
|||
|
|
bfd_byte buffer[4];
|
|||
|
|
int status;
|
|||
|
|
|
|||
|
|
/* Instruction addresses may have low two bits set. Clear them. */
|
|||
|
|
memaddr &=~ (bfd_vma) 3;
|
|||
|
|
|
|||
|
|
status = (*info->read_memory_func) (memaddr, buffer, 4, info);
|
|||
|
|
if (status != 0)
|
|||
|
|
{
|
|||
|
|
(*info->memory_error_func) (status, memaddr, info);
|
|||
|
|
return -1;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return m88kdis (memaddr, _do_getb32 (buffer), info);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* disassemble the instruction in 'instruction'.
|
|||
|
|
* 'pc' should be the address of this instruction, it will
|
|||
|
|
* be used to print the target address if this is a relative jump or call
|
|||
|
|
* the disassembled instruction is written to 'info'.
|
|||
|
|
* The function returns the length of this instruction in bytes.
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
static int
|
|||
|
|
m88kdis (pc, instruction, info)
|
|||
|
|
bfd_vma pc;
|
|||
|
|
unsigned long instruction;
|
|||
|
|
struct disassemble_info *info;
|
|||
|
|
{
|
|||
|
|
static int ihashtab_initialized = 0;
|
|||
|
|
unsigned int opcode;
|
|||
|
|
INSTAB *entry_ptr;
|
|||
|
|
int opmask;
|
|||
|
|
int class;
|
|||
|
|
|
|||
|
|
if (! ihashtab_initialized)
|
|||
|
|
init_disasm ();
|
|||
|
|
|
|||
|
|
/* create a the appropriate mask to isolate the opcode */
|
|||
|
|
opmask = DEFMASK;
|
|||
|
|
class = instruction & DEFMASK;
|
|||
|
|
if ((class >= SFU0) && (class <= SFU7))
|
|||
|
|
{
|
|||
|
|
if (instruction < SFU1)
|
|||
|
|
opmask = CTRLMASK;
|
|||
|
|
else
|
|||
|
|
opmask = SFUMASK;
|
|||
|
|
}
|
|||
|
|
else if (class == RRR)
|
|||
|
|
opmask = RRRMASK;
|
|||
|
|
else if (class == RRI10)
|
|||
|
|
opmask = RRI10MASK;
|
|||
|
|
|
|||
|
|
/* isolate the opcode */
|
|||
|
|
opcode = instruction & opmask;
|
|||
|
|
|
|||
|
|
/* search the hash table with the isolated opcode */
|
|||
|
|
for (entry_ptr = hashtable[opcode % HASHVAL];
|
|||
|
|
(entry_ptr != NULL) && (entry_ptr->opcode != opcode);
|
|||
|
|
entry_ptr = entry_ptr->next)
|
|||
|
|
;
|
|||
|
|
|
|||
|
|
if (entry_ptr == NULL)
|
|||
|
|
(*info->fprintf_func) (info->stream, "word\t%08x", instruction);
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
(*info->fprintf_func) (info->stream, "%s ", entry_ptr->mnemonic);
|
|||
|
|
printop (info, &(entry_ptr->op1), instruction, pc, 1);
|
|||
|
|
printop (info, &(entry_ptr->op2), instruction, pc, 0);
|
|||
|
|
printop (info, &(entry_ptr->op3), instruction, pc, 0);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return 4;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* Decode an Operand of an Instruction
|
|||
|
|
*
|
|||
|
|
* Functional Description
|
|||
|
|
*
|
|||
|
|
* This module formats and writes an operand of an instruction to info
|
|||
|
|
* based on the operand specification. When the first flag is set this
|
|||
|
|
* is the first operand of an instruction. Undefined operand types
|
|||
|
|
* cause a <dis error> message.
|
|||
|
|
*
|
|||
|
|
* Parameters
|
|||
|
|
* disassemble_info where the operand may be printed
|
|||
|
|
* OPSPEC *opptr Pointer to an operand specification
|
|||
|
|
* UINT inst Instruction from which operand is extracted
|
|||
|
|
* UINT pc PC of instruction; used for pc-relative disp.
|
|||
|
|
* int first Flag which if nonzero indicates the first
|
|||
|
|
* operand of an instruction
|
|||
|
|
*
|
|||
|
|
* Output
|
|||
|
|
*
|
|||
|
|
* The operand specified is extracted from the instruction and is
|
|||
|
|
* written to buf in the format specified. The operand is preceded
|
|||
|
|
* by a comma if it is not the first operand of an instruction and it
|
|||
|
|
* is not a register indirect form. Registers are preceded by 'r' and
|
|||
|
|
* hex values by '0x'.
|
|||
|
|
*
|
|||
|
|
* Revision History
|
|||
|
|
*
|
|||
|
|
* Revision 1.0 11/08/85 Creation date
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
static void
|
|||
|
|
printop (info, opptr, inst, pc, first)
|
|||
|
|
struct disassemble_info *info;
|
|||
|
|
OPSPEC *opptr;
|
|||
|
|
unsigned long inst;
|
|||
|
|
bfd_vma pc;
|
|||
|
|
int first;
|
|||
|
|
{
|
|||
|
|
int extracted_field;
|
|||
|
|
char *cond_mask_sym;
|
|||
|
|
|
|||
|
|
if (opptr->width == 0)
|
|||
|
|
return;
|
|||
|
|
|
|||
|
|
if (! first)
|
|||
|
|
{
|
|||
|
|
switch (opptr->type)
|
|||
|
|
{
|
|||
|
|
case REGSC:
|
|||
|
|
case CONT:
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
(*info->fprintf_func) (info->stream, ",");
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
switch (opptr->type)
|
|||
|
|
{
|
|||
|
|
case CRREG:
|
|||
|
|
(*info->fprintf_func) (info->stream, "cr%d",
|
|||
|
|
UEXT (inst, opptr->offset, opptr->width));
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
case FCRREG:
|
|||
|
|
(*info->fprintf_func) (info->stream, "fcr%d",
|
|||
|
|
UEXT (inst, opptr->offset, opptr->width));
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
case REGSC:
|
|||
|
|
(*info->fprintf_func) (info->stream, "[r%d]",
|
|||
|
|
UEXT (inst, opptr->offset, opptr->width));
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
case REG:
|
|||
|
|
(*info->fprintf_func) (info->stream, "r%d",
|
|||
|
|
UEXT (inst, opptr->offset, opptr->width));
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
case HEX:
|
|||
|
|
extracted_field = UEXT (inst, opptr->offset, opptr->width);
|
|||
|
|
if (extracted_field == 0)
|
|||
|
|
(*info->fprintf_func) (info->stream, "0");
|
|||
|
|
else
|
|||
|
|
(*info->fprintf_func) (info->stream, "0x%02x", extracted_field);
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
case CONDMASK:
|
|||
|
|
extracted_field = UEXT (inst, opptr->offset, opptr->width);
|
|||
|
|
switch (extracted_field & 0x0f)
|
|||
|
|
{
|
|||
|
|
case 0x1: cond_mask_sym = "gt0"; break;
|
|||
|
|
case 0x2: cond_mask_sym = "eq0"; break;
|
|||
|
|
case 0x3: cond_mask_sym = "ge0"; break;
|
|||
|
|
case 0xc: cond_mask_sym = "lt0"; break;
|
|||
|
|
case 0xd: cond_mask_sym = "ne0"; break;
|
|||
|
|
case 0xe: cond_mask_sym = "le0"; break;
|
|||
|
|
default: cond_mask_sym = NULL; break;
|
|||
|
|
}
|
|||
|
|
if (cond_mask_sym != NULL)
|
|||
|
|
(*info->fprintf_func) (info->stream, "%s", cond_mask_sym);
|
|||
|
|
else
|
|||
|
|
(*info->fprintf_func) (info->stream, "%x", extracted_field);
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
case PCREL:
|
|||
|
|
(*info->print_address_func)
|
|||
|
|
(pc + (4 * (SEXT (inst, opptr->offset, opptr->width))),
|
|||
|
|
info);
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
case CONT:
|
|||
|
|
(*info->fprintf_func) (info->stream, "%d,r%d",
|
|||
|
|
UEXT (inst, opptr->offset, 5),
|
|||
|
|
UEXT (inst, (opptr->offset) + 5, 5));
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
case BF:
|
|||
|
|
(*info->fprintf_func) (info->stream, "%d<%d>",
|
|||
|
|
UEXT (inst, (opptr->offset) + 5, 5),
|
|||
|
|
UEXT (inst, opptr->offset, 5));
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
default:
|
|||
|
|
(*info->fprintf_func) (info->stream, "# <dis error: %08x>", inst);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* Initialize the Disassembler Instruction Table
|
|||
|
|
*
|
|||
|
|
* Initialize the hash table and instruction table for the disassembler.
|
|||
|
|
* This should be called once before the first call to disasm().
|
|||
|
|
*
|
|||
|
|
* Parameters
|
|||
|
|
*
|
|||
|
|
* Output
|
|||
|
|
*
|
|||
|
|
* If the debug option is selected, certain statistics about the hashing
|
|||
|
|
* distribution are written to stdout.
|
|||
|
|
*
|
|||
|
|
* Revision History
|
|||
|
|
*
|
|||
|
|
* Revision 1.0 11/08/85 Creation date
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
static void
|
|||
|
|
init_disasm ()
|
|||
|
|
{
|
|||
|
|
int i, size;
|
|||
|
|
|
|||
|
|
for (i = 0; i < HASHVAL; i++)
|
|||
|
|
hashtable[i] = NULL;
|
|||
|
|
|
|||
|
|
size = sizeof (instructions) / sizeof (INSTAB);
|
|||
|
|
for (i = 0; i < size; i++)
|
|||
|
|
install (&instructions[i]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* Insert an instruction into the disassembler table by hashing the
|
|||
|
|
* opcode and inserting it into the linked list for that hash value.
|
|||
|
|
*
|
|||
|
|
* Parameters
|
|||
|
|
*
|
|||
|
|
* INSTAB *instptr Pointer to the entry in the instruction table
|
|||
|
|
* to be installed
|
|||
|
|
*
|
|||
|
|
* Revision 1.0 11/08/85 Creation date
|
|||
|
|
* 05/11/89 R. TRAWICK ADAPTED FROM MOTOROLA
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
static void
|
|||
|
|
install (instptr)
|
|||
|
|
INSTAB *instptr;
|
|||
|
|
{
|
|||
|
|
unsigned int i;
|
|||
|
|
|
|||
|
|
i = (instptr->opcode) % HASHVAL;
|
|||
|
|
instptr->next = hashtable[i];
|
|||
|
|
hashtable[i] = instptr;
|
|||
|
|
}
|