URL
https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk
Subversion Repositories openrisc_me
[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.2/] [opcodes/] [h8500-dis.c] - Rev 330
Compare with Previous | Blame | View Log
/* Disassemble h8500 instructions. Copyright 1993, 1998, 2000, 2001, 2002, 2004, 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> #define DISASSEMBLER_TABLE #define DEFINE_TABLE #include "sysdep.h" #include "h8500-opc.h" #include "dis-asm.h" #include "opintl.h" /* Maximum length of an instruction. */ #define MAXLEN 8 #include <setjmp.h> struct private { /* Points to first byte not fetched. */ bfd_byte *max_fetched; bfd_byte the_buffer[MAXLEN]; bfd_vma insn_start; jmp_buf bailout; }; /* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive) to ADDR (exclusive) are valid. Returns 1 for success, longjmps on error. */ #define FETCH_DATA(info, addr) \ ((addr) <= ((struct private *)(info->private_data))->max_fetched \ ? 1 : fetch_data ((info), (addr))) static int fetch_data (struct disassemble_info *info, bfd_byte *addr) { int status; struct private *priv = (struct private *) info->private_data; bfd_vma start = priv->insn_start + (priv->max_fetched - priv->the_buffer); status = (*info->read_memory_func) (start, priv->max_fetched, addr - priv->max_fetched, info); if (status != 0) { (*info->memory_error_func) (status, start, info); longjmp (priv->bailout, 1); } else priv->max_fetched = addr; return 1; } static char *crname[] = { "sr", "ccr", "*", "br", "ep", "dp", "*", "tp" }; int print_insn_h8500 (bfd_vma addr, disassemble_info *info) { const h8500_opcode_info *opcode; void *stream = info->stream; fprintf_ftype func = info->fprintf_func; struct private priv; bfd_byte *buffer = priv.the_buffer; info->private_data = (PTR) & priv; priv.max_fetched = priv.the_buffer; priv.insn_start = addr; if (setjmp (priv.bailout) != 0) /* Error return. */ return -1; /* Run down the table to find the one which matches. */ for (opcode = h8500_table; opcode->name; opcode++) { int byte; int rn = 0; int rd = 0; int rs = 0; int disp = 0; int abs_val = 0; int imm = 0; int pcrel = 0; int qim = 0; int i; int cr = 0; for (byte = 0; byte < opcode->length; byte++) { FETCH_DATA (info, buffer + byte + 1); if ((buffer[byte] & opcode->bytes[byte].mask) != (opcode->bytes[byte].contents)) goto next; else { /* Extract any info parts. */ switch (opcode->bytes[byte].insert) { case 0: case FP: break; default: /* xgettext:c-format */ func (stream, _("can't cope with insert %d\n"), opcode->bytes[byte].insert); break; case RN: rn = buffer[byte] & 0x7; break; case RS: rs = buffer[byte] & 0x7; break; case CRB: cr = buffer[byte] & 0x7; if (cr == 0) goto next; break; case CRW: cr = buffer[byte] & 0x7; if (cr != 0) goto next; break; case DISP16: FETCH_DATA (info, buffer + byte + 2); disp = (buffer[byte] << 8) | (buffer[byte + 1]); break; case FPIND_D8: case DISP8: disp = ((char) (buffer[byte])); break; case RD: case RDIND: rd = buffer[byte] & 0x7; break; case ABS24: FETCH_DATA (info, buffer + byte + 3); abs_val = (buffer[byte] << 16) | (buffer[byte + 1] << 8) | (buffer[byte + 2]); break; case ABS16: FETCH_DATA (info, buffer + byte + 2); abs_val = (buffer[byte] << 8) | (buffer[byte + 1]); break; case ABS8: abs_val = (buffer[byte]); break; case IMM16: FETCH_DATA (info, buffer + byte + 2); imm = (buffer[byte] << 8) | (buffer[byte + 1]); break; case IMM4: imm = (buffer[byte]) & 0xf; break; case IMM8: case RLIST: imm = (buffer[byte]); break; case PCREL16: FETCH_DATA (info, buffer + byte + 2); pcrel = (buffer[byte] << 8) | (buffer[byte + 1]); break; case PCREL8: pcrel = (buffer[byte]); break; case QIM: switch (buffer[byte] & 0x7) { case 0: qim = 1; break; case 1: qim = 2; break; case 4: qim = -1; break; case 5: qim = -2; break; } break; } } } /* We get here when all the masks have passed so we can output the operands. */ FETCH_DATA (info, buffer + opcode->length); (func) (stream, "%s\t", opcode->name); for (i = 0; i < opcode->nargs; i++) { if (i) (func) (stream, ","); switch (opcode->arg_type[i]) { case FP: func (stream, "fp"); break; case RNIND_D16: func (stream, "@(0x%x:16,r%d)", disp, rn); break; case RNIND_D8: func (stream, "@(0x%x:8 (%d),r%d)", disp & 0xff, disp, rn); break; case RDIND_D16: func (stream, "@(0x%x:16,r%d)", disp, rd); break; case RDIND_D8: func (stream, "@(0x%x:8 (%d), r%d)", disp & 0xff, disp, rd); break; case FPIND_D8: func (stream, "@(0x%x:8 (%d), fp)", disp & 0xff, disp); break; case CRB: case CRW: func (stream, "%s", crname[cr]); break; case RN: func (stream, "r%d", rn); break; case RD: func (stream, "r%d", rd); break; case RS: func (stream, "r%d", rs); break; case RNDEC: func (stream, "@-r%d", rn); break; case RNINC: func (stream, "@r%d+", rn); break; case RNIND: func (stream, "@r%d", rn); break; case RDIND: func (stream, "@r%d", rd); break; case SPINC: func (stream, "@sp+"); break; case SPDEC: func (stream, "@-sp"); break; case ABS24: func (stream, "@0x%0x:24", abs_val); break; case ABS16: func (stream, "@0x%0x:16", abs_val & 0xffff); break; case ABS8: func (stream, "@0x%0x:8", abs_val & 0xff); break; case IMM16: func (stream, "#0x%0x:16", imm & 0xffff); break; case RLIST: { int j; int nc = 0; func (stream, "("); for (j = 0; j < 8; j++) { if (imm & (1 << j)) { func (stream, "r%d", j); if (nc) func (stream, ","); nc = 1; } } func (stream, ")"); } break; case IMM8: func (stream, "#0x%0x:8", imm & 0xff); break; case PCREL16: func (stream, "0x%0x:16", (int)(pcrel + addr + opcode->length) & 0xffff); break; case PCREL8: func (stream, "#0x%0x:8", (int)((char) pcrel + addr + opcode->length) & 0xffff); break; case QIM: func (stream, "#%d:q", qim); break; case IMM4: func (stream, "#%d:4", imm); break; } } return opcode->length; next: ; } /* Couldn't understand anything. */ /* xgettext:c-format */ func (stream, _("%02x\t\t*unknown*"), buffer[0]); return 1; }