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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [opcodes/] [m10200-dis.c] - Rev 430
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/* Disassemble MN10200 instructions. Copyright 1996, 1997, 1998, 2000, 2005, 2007 Free Software Foundation, Inc. This file is part of the GNU opcodes library. 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. 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 <stdio.h> #include "sysdep.h" #include "opcode/mn10200.h" #include "dis-asm.h" #include "opintl.h" static void disassemble (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%ld", 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%ld", 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); } int print_insn_mn10200 (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%02lx"), insn); return 1; } disassemble (memaddr, info, insn, extension, consume); return consume; }
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