diff options
Diffstat (limited to 'opcodes/m10200-dis.c')
| -rw-r--r-- | opcodes/m10200-dis.c | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/opcodes/m10200-dis.c b/opcodes/m10200-dis.c new file mode 100644 index 0000000..022c7e3 --- /dev/null +++ b/opcodes/m10200-dis.c @@ -0,0 +1,341 @@ +/* Disassemble MN10200 instructions. + Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. + +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 <stdio.h> + +#include "ansidecl.h" +#include "opcode/mn10200.h" +#include "dis-asm.h" +#include "opintl.h" + +static void disassemble PARAMS ((bfd_vma, struct disassemble_info *, + unsigned long insn, unsigned long, + unsigned int)); + +int +print_insn_mn10200 (memaddr, info) + bfd_vma memaddr; + struct disassemble_info *info; +{ + int status; + bfd_byte buffer[4]; + unsigned long insn; + unsigned long extension = 0; + unsigned int consume; + + /* First figure out how big the opcode is. */ + status = (*info->read_memory_func) (memaddr, buffer, 1, info); + if (status != 0) + { + (*info->memory_error_func) (status, memaddr, info); + return -1; + } + + insn = *(unsigned char *) buffer; + + /* These are one byte insns. */ + if ((insn & 0xf0) == 0x00 + || (insn & 0xf0) == 0x10 + || (insn & 0xf0) == 0x20 + || (insn & 0xf0) == 0x30 + || ((insn & 0xf0) == 0x80 + && (insn & 0x0c) >> 2 != (insn & 0x03)) + || (insn & 0xf0) == 0x90 + || (insn & 0xf0) == 0xa0 + || (insn & 0xf0) == 0xb0 + || (insn & 0xff) == 0xeb + || (insn & 0xff) == 0xf6 + || (insn & 0xff) == 0xfe + || (insn & 0xff) == 0xff) + { + extension = 0; + consume = 1; + } + + /* These are two byte insns. */ + else if ((insn & 0xf0) == 0x40 + || (insn & 0xf0) == 0x50 + || (insn & 0xf0) == 0x60 + || (insn & 0xf0) == 0x70 + || (insn & 0xf0) == 0x80 + || (insn & 0xfc) == 0xd0 + || (insn & 0xfc) == 0xd4 + || (insn & 0xfc) == 0xd8 + || (insn & 0xfc) == 0xe0 + || (insn & 0xfc) == 0xe4 + || (insn & 0xff) == 0xe8 + || (insn & 0xff) == 0xe9 + || (insn & 0xff) == 0xea + || (insn & 0xff) == 0xf0 + || (insn & 0xff) == 0xf1 + || (insn & 0xff) == 0xf2 + || (insn & 0xff) == 0xf3) + { + status = (*info->read_memory_func) (memaddr, buffer, 2, info); + if (status != 0) + { + (*info->memory_error_func) (status, memaddr, info); + return -1; + } + insn = bfd_getb16 (buffer); + consume = 2; + } + + /* These are three byte insns with a 16bit operand in little + endian form. */ + else if ((insn & 0xf0) == 0xc0 + || (insn & 0xfc) == 0xdc + || (insn & 0xfc) == 0xec + || (insn & 0xff) == 0xf8 + || (insn & 0xff) == 0xf9 + || (insn & 0xff) == 0xfa + || (insn & 0xff) == 0xfb + || (insn & 0xff) == 0xfc + || (insn & 0xff) == 0xfd) + { + status = (*info->read_memory_func) (memaddr + 1, buffer, 2, info); + if (status != 0) + { + (*info->memory_error_func) (status, memaddr, info); + return -1; + } + insn <<= 16; + insn |= bfd_getl16 (buffer); + extension = 0; + consume = 3; + } + /* These are three byte insns too, but we don't have to mess with + endianness stuff. */ + else if ((insn & 0xff) == 0xf5) + { + status = (*info->read_memory_func) (memaddr + 1, buffer, 2, info); + if (status != 0) + { + (*info->memory_error_func) (status, memaddr, info); + return -1; + } + insn <<= 16; + insn |= bfd_getb16 (buffer); + extension = 0; + consume = 3; + } + + /* These are four byte insns. */ + else if ((insn & 0xff) == 0xf7) + { + status = (*info->read_memory_func) (memaddr, buffer, 2, info); + if (status != 0) + { + (*info->memory_error_func) (status, memaddr, info); + return -1; + } + insn = bfd_getb16 (buffer); + insn <<= 16; + status = (*info->read_memory_func) (memaddr + 2, buffer, 2, info); + if (status != 0) + { + (*info->memory_error_func) (status, memaddr, info); + return -1; + } + insn |= bfd_getl16 (buffer); + extension = 0; + consume = 4; + } + + /* These are five byte insns. */ + else if ((insn & 0xff) == 0xf4) + { + status = (*info->read_memory_func) (memaddr, buffer, 2, info); + if (status != 0) + { + (*info->memory_error_func) (status, memaddr, info); + return -1; + } + insn = bfd_getb16 (buffer); + insn <<= 16; + + status = (*info->read_memory_func) (memaddr + 4, buffer, 1, info); + if (status != 0) + { + (*info->memory_error_func) (status, memaddr, info); + return -1; + } + insn |= (*(unsigned char *)buffer << 8) & 0xff00; + + status = (*info->read_memory_func) (memaddr + 3, buffer, 1, info); + if (status != 0) + { + (*info->memory_error_func) (status, memaddr, info); + return -1; + } + insn |= (*(unsigned char *)buffer) & 0xff; + + status = (*info->read_memory_func) (memaddr + 2, buffer, 1, info); + if (status != 0) + { + (*info->memory_error_func) (status, memaddr, info); + return -1; + } + extension = (*(unsigned char *)buffer) & 0xff; + consume = 5; + } + else + { + (*info->fprintf_func) (info->stream, _("unknown\t0x%02x"), insn); + return 1; + } + + disassemble (memaddr, info, insn, extension, consume); + + return consume; +} + +static void +disassemble (memaddr, info, insn, extension, size) + bfd_vma memaddr; + struct disassemble_info *info; + unsigned long insn; + unsigned long extension; + unsigned int size; +{ + struct mn10200_opcode *op = (struct mn10200_opcode *)mn10200_opcodes; + const struct mn10200_operand *operand; + int match = 0; + + /* Find the opcode. */ + while (op->name) + { + int mysize, extra_shift; + + if (op->format == FMT_1) + mysize = 1; + else if (op->format == FMT_2 + || op->format == FMT_4) + mysize = 2; + else if (op->format == FMT_3 + || op->format == FMT_5) + mysize = 3; + else if (op->format == FMT_6) + mysize = 4; + else if (op->format == FMT_7) + mysize = 5; + else + abort (); + + if (op->format == FMT_2 || op->format == FMT_5) + extra_shift = 8; + else if (op->format == FMT_3 + || op->format == FMT_6 + || op->format == FMT_7) + extra_shift = 16; + else + extra_shift = 0; + + if ((op->mask & insn) == op->opcode + && size == (unsigned int) mysize) + { + const unsigned char *opindex_ptr; + unsigned int nocomma; + int paren = 0; + + match = 1; + (*info->fprintf_func) (info->stream, "%s\t", op->name); + + /* Now print the operands. */ + for (opindex_ptr = op->operands, nocomma = 1; + *opindex_ptr != 0; + opindex_ptr++) + { + unsigned long value; + + operand = &mn10200_operands[*opindex_ptr]; + + if ((operand->flags & MN10200_OPERAND_EXTENDED) != 0) + { + value = (insn & 0xffff) << 8; + value |= extension; + } + else + { + value = ((insn >> (operand->shift)) + & ((1L << operand->bits) - 1L)); + } + + if ((operand->flags & MN10200_OPERAND_SIGNED) != 0) + value = ((long)(value << (32 - operand->bits)) + >> (32 - operand->bits)); + + if (!nocomma + && (!paren + || ((operand->flags & MN10200_OPERAND_PAREN) == 0))) + (*info->fprintf_func) (info->stream, ","); + + nocomma = 0; + + if ((operand->flags & MN10200_OPERAND_DREG) != 0) + { + value = ((insn >> (operand->shift + extra_shift)) + & ((1 << operand->bits) - 1)); + (*info->fprintf_func) (info->stream, "d%d", value); + } + + else if ((operand->flags & MN10200_OPERAND_AREG) != 0) + { + value = ((insn >> (operand->shift + extra_shift)) + & ((1 << operand->bits) - 1)); + (*info->fprintf_func) (info->stream, "a%d", value); + } + + else if ((operand->flags & MN10200_OPERAND_PSW) != 0) + (*info->fprintf_func) (info->stream, "psw"); + + else if ((operand->flags & MN10200_OPERAND_MDR) != 0) + (*info->fprintf_func) (info->stream, "mdr"); + + else if ((operand->flags & MN10200_OPERAND_PAREN) != 0) + { + if (paren) + (*info->fprintf_func) (info->stream, ")"); + else + { + (*info->fprintf_func) (info->stream, "("); + nocomma = 1; + } + paren = !paren; + } + + else if ((operand->flags & MN10200_OPERAND_PCREL) != 0) + (*info->print_address_func) ((value + memaddr + mysize) & 0xffffff, info); + + else if ((operand->flags & MN10200_OPERAND_MEMADDR) != 0) + (*info->print_address_func) (value, info); + + else + (*info->fprintf_func) (info->stream, "%ld", value); + } + /* All done. */ + break; + } + op++; + } + + if (!match) + { + (*info->fprintf_func) (info->stream, _("unknown\t0x%04lx"), insn); + } +} |