1/* ppc-dis.c -- Disassemble PowerPC instructions 2 Copyright 1994, 1995, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 3 Free Software Foundation, Inc. 4 Written by Ian Lance Taylor, Cygnus Support 5 6This file is part of GDB, GAS, and the GNU binutils. 7 8GDB, GAS, and the GNU binutils are free software; you can redistribute 9them and/or modify them under the terms of the GNU General Public 10License as published by the Free Software Foundation; either version 112, or (at your option) any later version. 12 13GDB, GAS, and the GNU binutils are distributed in the hope that they 14will be useful, but WITHOUT ANY WARRANTY; without even the implied 15warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 16the GNU General Public License for more details. 17 18You should have received a copy of the GNU General Public License 19along with this file; see the file COPYING. If not, write to the Free 20Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 21 22#include <stdio.h> 23#include "sysdep.h" 24#include "dis-asm.h" 25#include "opcode/ppc.h" 26 27/* This file provides several disassembler functions, all of which use 28 the disassembler interface defined in dis-asm.h. Several functions 29 are provided because this file handles disassembly for the PowerPC 30 in both big and little endian mode and also for the POWER (RS/6000) 31 chip. */ 32 33static int print_insn_powerpc (bfd_vma, struct disassemble_info *, int, int); 34 35/* Determine which set of machines to disassemble for. PPC403/601 or 36 BookE. For convenience, also disassemble instructions supported 37 by the AltiVec vector unit. */ 38 39static int 40powerpc_dialect (struct disassemble_info *info) 41{ 42 int dialect = PPC_OPCODE_PPC; 43 44 if (BFD_DEFAULT_TARGET_SIZE == 64) 45 dialect |= PPC_OPCODE_64; 46 47 if (info->disassembler_options 48 && strstr (info->disassembler_options, "booke") != NULL) 49 dialect |= PPC_OPCODE_BOOKE | PPC_OPCODE_BOOKE64; 50 else if ((info->mach == bfd_mach_ppc_e500) 51 || (info->disassembler_options 52 && strstr (info->disassembler_options, "e500") != NULL)) 53 dialect |= (PPC_OPCODE_BOOKE 54 | PPC_OPCODE_SPE | PPC_OPCODE_ISEL 55 | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK 56 | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK 57 | PPC_OPCODE_RFMCI); 58 else if (info->disassembler_options 59 && strstr (info->disassembler_options, "efs") != NULL) 60 dialect |= PPC_OPCODE_EFS; 61 else if (info->disassembler_options 62 && strstr (info->disassembler_options, "e300") != NULL) 63 dialect |= PPC_OPCODE_E300 | PPC_OPCODE_CLASSIC | PPC_OPCODE_COMMON; 64 else if (info->disassembler_options 65 && strstr (info->disassembler_options, "440") != NULL) 66 dialect |= PPC_OPCODE_BOOKE | PPC_OPCODE_32 67 | PPC_OPCODE_440 | PPC_OPCODE_ISEL | PPC_OPCODE_RFMCI; 68 else 69 dialect |= (PPC_OPCODE_403 | PPC_OPCODE_601 | PPC_OPCODE_CLASSIC 70 | PPC_OPCODE_COMMON | PPC_OPCODE_ALTIVEC); 71 72 if (info->disassembler_options 73 && strstr (info->disassembler_options, "power4") != NULL) 74 dialect |= PPC_OPCODE_POWER4; 75 76 if (info->disassembler_options 77 && strstr (info->disassembler_options, "power5") != NULL) 78 dialect |= PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5; 79 80 if (info->disassembler_options 81 && strstr (info->disassembler_options, "cell") != NULL) 82 dialect |= PPC_OPCODE_POWER4 | PPC_OPCODE_CELL | PPC_OPCODE_ALTIVEC; 83 84 if (info->disassembler_options 85 && strstr (info->disassembler_options, "power6") != NULL) 86 dialect |= PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_ALTIVEC; 87 88 if (info->disassembler_options 89 && strstr (info->disassembler_options, "any") != NULL) 90 dialect |= PPC_OPCODE_ANY; 91 92 if (info->disassembler_options) 93 { 94 if (strstr (info->disassembler_options, "32") != NULL) 95 dialect &= ~PPC_OPCODE_64; 96 else if (strstr (info->disassembler_options, "64") != NULL) 97 dialect |= PPC_OPCODE_64; 98 } 99 100 info->private_data = (char *) 0 + dialect; 101 return dialect; 102} 103 104/* Print a big endian PowerPC instruction. */ 105 106int 107print_insn_big_powerpc (bfd_vma memaddr, struct disassemble_info *info) 108{ 109 int dialect = (char *) info->private_data - (char *) 0; 110 return print_insn_powerpc (memaddr, info, 1, dialect); 111} 112 113/* Print a little endian PowerPC instruction. */ 114 115int 116print_insn_little_powerpc (bfd_vma memaddr, struct disassemble_info *info) 117{ 118 int dialect = (char *) info->private_data - (char *) 0; 119 return print_insn_powerpc (memaddr, info, 0, dialect); 120} 121 122/* Print a POWER (RS/6000) instruction. */ 123 124int 125print_insn_rs6000 (bfd_vma memaddr, struct disassemble_info *info) 126{ 127 return print_insn_powerpc (memaddr, info, 1, PPC_OPCODE_POWER); 128} 129 130/* Print a PowerPC or POWER instruction. */ 131 132static int 133print_insn_powerpc (bfd_vma memaddr, 134 struct disassemble_info *info, 135 int bigendian, 136 int dialect) 137{ 138 bfd_byte buffer[4]; 139 int status; 140 unsigned long insn; 141 const struct powerpc_opcode *opcode; 142 const struct powerpc_opcode *opcode_end; 143 unsigned long op; 144 145 if (dialect == 0) 146 dialect = powerpc_dialect (info); 147 148 status = (*info->read_memory_func) (memaddr, buffer, 4, info); 149 if (status != 0) 150 { 151 (*info->memory_error_func) (status, memaddr, info); 152 return -1; 153 } 154 155 if (bigendian) 156 insn = bfd_getb32 (buffer); 157 else 158 insn = bfd_getl32 (buffer); 159 160 /* Get the major opcode of the instruction. */ 161 op = PPC_OP (insn); 162 163 /* Find the first match in the opcode table. We could speed this up 164 a bit by doing a binary search on the major opcode. */ 165 opcode_end = powerpc_opcodes + powerpc_num_opcodes; 166 again: 167 for (opcode = powerpc_opcodes; opcode < opcode_end; opcode++) 168 { 169 unsigned long table_op; 170 const unsigned char *opindex; 171 const struct powerpc_operand *operand; 172 int invalid; 173 int need_comma; 174 int need_paren; 175 176 table_op = PPC_OP (opcode->opcode); 177 if (op < table_op) 178 break; 179 if (op > table_op) 180 continue; 181 182 if ((insn & opcode->mask) != opcode->opcode 183 || (opcode->flags & dialect) == 0) 184 continue; 185 186 /* Make two passes over the operands. First see if any of them 187 have extraction functions, and, if they do, make sure the 188 instruction is valid. */ 189 invalid = 0; 190 for (opindex = opcode->operands; *opindex != 0; opindex++) 191 { 192 operand = powerpc_operands + *opindex; 193 if (operand->extract) 194 (*operand->extract) (insn, dialect, &invalid); 195 } 196 if (invalid) 197 continue; 198 199 /* The instruction is valid. */ 200 if (opcode->operands[0] != 0) 201 (*info->fprintf_func) (info->stream, "%-7s ", opcode->name); 202 else 203 (*info->fprintf_func) (info->stream, "%s", opcode->name); 204 205 /* Now extract and print the operands. */ 206 need_comma = 0; 207 need_paren = 0; 208 for (opindex = opcode->operands; *opindex != 0; opindex++) 209 { 210 long value; 211 212 operand = powerpc_operands + *opindex; 213 214 /* Operands that are marked FAKE are simply ignored. We 215 already made sure that the extract function considered 216 the instruction to be valid. */ 217 if ((operand->flags & PPC_OPERAND_FAKE) != 0) 218 continue; 219 220 /* Extract the value from the instruction. */ 221 if (operand->extract) 222 value = (*operand->extract) (insn, dialect, &invalid); 223 else 224 { 225 value = (insn >> operand->shift) & ((1 << operand->bits) - 1); 226 if ((operand->flags & PPC_OPERAND_SIGNED) != 0 227 && (value & (1 << (operand->bits - 1))) != 0) 228 value -= 1 << operand->bits; 229 } 230 231 /* If the operand is optional, and the value is zero, don't 232 print anything. */ 233 if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0 234 && (operand->flags & PPC_OPERAND_NEXT) == 0 235 && value == 0) 236 continue; 237 238 if (need_comma) 239 { 240 (*info->fprintf_func) (info->stream, ","); 241 need_comma = 0; 242 } 243 244 /* Print the operand as directed by the flags. */ 245 if ((operand->flags & PPC_OPERAND_GPR) != 0 246 || ((operand->flags & PPC_OPERAND_GPR_0) != 0 && value != 0)) 247 (*info->fprintf_func) (info->stream, "r%ld", value); 248 else if ((operand->flags & PPC_OPERAND_FPR) != 0) 249 (*info->fprintf_func) (info->stream, "f%ld", value); 250 else if ((operand->flags & PPC_OPERAND_VR) != 0) 251 (*info->fprintf_func) (info->stream, "v%ld", value); 252 else if ((operand->flags & PPC_OPERAND_RELATIVE) != 0) 253 (*info->print_address_func) (memaddr + value, info); 254 else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0) 255 (*info->print_address_func) ((bfd_vma) value & 0xffffffff, info); 256 else if ((operand->flags & PPC_OPERAND_CR) == 0 257 || (dialect & PPC_OPCODE_PPC) == 0) 258 (*info->fprintf_func) (info->stream, "%ld", value); 259 else 260 { 261 if (operand->bits == 3) 262 (*info->fprintf_func) (info->stream, "cr%ld", value); 263 else 264 { 265 static const char *cbnames[4] = { "lt", "gt", "eq", "so" }; 266 int cr; 267 int cc; 268 269 cr = value >> 2; 270 if (cr != 0) 271 (*info->fprintf_func) (info->stream, "4*cr%d+", cr); 272 cc = value & 3; 273 (*info->fprintf_func) (info->stream, "%s", cbnames[cc]); 274 } 275 } 276 277 if (need_paren) 278 { 279 (*info->fprintf_func) (info->stream, ")"); 280 need_paren = 0; 281 } 282 283 if ((operand->flags & PPC_OPERAND_PARENS) == 0) 284 need_comma = 1; 285 else 286 { 287 (*info->fprintf_func) (info->stream, "("); 288 need_paren = 1; 289 } 290 } 291 292 /* We have found and printed an instruction; return. */ 293 return 4; 294 } 295 296 if ((dialect & PPC_OPCODE_ANY) != 0) 297 { 298 dialect = ~PPC_OPCODE_ANY; 299 goto again; 300 } 301 302 /* We could not find a match. */ 303 (*info->fprintf_func) (info->stream, ".long 0x%lx", insn); 304 305 return 4; 306} 307 308void 309print_ppc_disassembler_options (FILE *stream) 310{ 311 fprintf (stream, "\n\ 312The following PPC specific disassembler options are supported for use with\n\ 313the -M switch:\n"); 314 315 fprintf (stream, " booke|booke32|booke64 Disassemble the BookE instructions\n"); 316 fprintf (stream, " e300 Disassemble the e300 instructions\n"); 317 fprintf (stream, " e500|e500x2 Disassemble the e500 instructions\n"); 318 fprintf (stream, " 440 Disassemble the 440 instructions\n"); 319 fprintf (stream, " efs Disassemble the EFS instructions\n"); 320 fprintf (stream, " power4 Disassemble the Power4 instructions\n"); 321 fprintf (stream, " power5 Disassemble the Power5 instructions\n"); 322 fprintf (stream, " power6 Disassemble the Power6 instructions\n"); 323 fprintf (stream, " 32 Do not disassemble 64-bit instructions\n"); 324 fprintf (stream, " 64 Allow disassembly of 64-bit instructions\n"); 325} 326