1 /* ppc-dis.c -- Disassemble PowerPC instructions
2 Copyright 1994, 1995, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
3 2008 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support
6 This file is part of the GNU opcodes library.
8 This library is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 It is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
16 License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this file; see the file COPYING. If not, write to the
20 Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
26 #include "opcode/ppc.h"
28 /* This file provides several disassembler functions, all of which use
29 the disassembler interface defined in dis-asm.h. Several functions
30 are provided because this file handles disassembly for the PowerPC
31 in both big and little endian mode and also for the POWER (RS/6000)
33 static int print_insn_powerpc (bfd_vma, struct disassemble_info *, int,
38 /* Stash the result of parsing disassembler_options here. */
42 #define POWERPC_DIALECT(INFO) \
43 (((struct dis_private *) ((INFO)->private_data))->dialect)
45 /* Determine which set of machines to disassemble for. PPC403/601 or
46 BookE. For convenience, also disassemble instructions supported
47 by the AltiVec vector unit. */
50 powerpc_init_dialect (struct disassemble_info *info)
52 ppc_cpu_t dialect = PPC_OPCODE_PPC;
53 struct dis_private *priv = calloc (sizeof (*priv), 1);
58 if (BFD_DEFAULT_TARGET_SIZE == 64)
59 dialect |= PPC_OPCODE_64;
61 if (info->disassembler_options
62 && strstr (info->disassembler_options, "ppcps") != NULL)
63 dialect |= PPC_OPCODE_PPCPS;
64 else if (info->disassembler_options
65 && strstr (info->disassembler_options, "booke") != NULL)
66 dialect |= PPC_OPCODE_BOOKE | PPC_OPCODE_BOOKE64;
67 else if ((info->mach == bfd_mach_ppc_e500mc)
68 || (info->disassembler_options
69 && strstr (info->disassembler_options, "e500mc") != NULL))
70 dialect |= (PPC_OPCODE_BOOKE | PPC_OPCODE_ISEL
71 | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK
72 | PPC_OPCODE_RFMCI | PPC_OPCODE_E500MC);
73 else if ((info->mach == bfd_mach_ppc_e500)
74 || (info->disassembler_options
75 && strstr (info->disassembler_options, "e500") != NULL))
76 dialect |= (PPC_OPCODE_BOOKE
77 | PPC_OPCODE_SPE | PPC_OPCODE_ISEL
78 | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK
79 | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK
80 | PPC_OPCODE_RFMCI | PPC_OPCODE_E500MC);
81 else if (info->disassembler_options
82 && strstr (info->disassembler_options, "efs") != NULL)
83 dialect |= PPC_OPCODE_EFS;
84 else if (info->disassembler_options
85 && strstr (info->disassembler_options, "e300") != NULL)
86 dialect |= PPC_OPCODE_E300 | PPC_OPCODE_CLASSIC | PPC_OPCODE_COMMON;
87 else if (info->disassembler_options
88 && (strstr (info->disassembler_options, "440") != NULL
89 || strstr (info->disassembler_options, "464") != NULL))
90 dialect |= PPC_OPCODE_BOOKE | PPC_OPCODE_32
91 | PPC_OPCODE_440 | PPC_OPCODE_ISEL | PPC_OPCODE_RFMCI;
93 dialect |= (PPC_OPCODE_403 | PPC_OPCODE_601 | PPC_OPCODE_CLASSIC
94 | PPC_OPCODE_COMMON | PPC_OPCODE_ALTIVEC);
96 if (info->disassembler_options
97 && strstr (info->disassembler_options, "power4") != NULL)
98 dialect |= PPC_OPCODE_POWER4;
100 if (info->disassembler_options
101 && strstr (info->disassembler_options, "power5") != NULL)
102 dialect |= PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5;
104 if (info->disassembler_options
105 && strstr (info->disassembler_options, "cell") != NULL)
106 dialect |= PPC_OPCODE_POWER4 | PPC_OPCODE_CELL | PPC_OPCODE_ALTIVEC;
108 if (info->disassembler_options
109 && strstr (info->disassembler_options, "power6") != NULL)
110 dialect |= PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_ALTIVEC;
112 if (info->disassembler_options
113 && strstr (info->disassembler_options, "any") != NULL)
114 dialect |= PPC_OPCODE_ANY;
116 if (info->disassembler_options)
118 if (strstr (info->disassembler_options, "32") != NULL)
119 dialect &= ~PPC_OPCODE_64;
120 else if (strstr (info->disassembler_options, "64") != NULL)
121 dialect |= PPC_OPCODE_64;
124 info->private_data = priv;
125 POWERPC_DIALECT(info) = dialect;
130 /* Print a big endian PowerPC instruction. */
133 print_insn_big_powerpc (bfd_vma memaddr, struct disassemble_info *info)
135 if (info->private_data == NULL && !powerpc_init_dialect (info))
137 return print_insn_powerpc (memaddr, info, 1, POWERPC_DIALECT(info));
140 /* Print a little endian PowerPC instruction. */
143 print_insn_little_powerpc (bfd_vma memaddr, struct disassemble_info *info)
145 if (info->private_data == NULL && !powerpc_init_dialect (info))
147 return print_insn_powerpc (memaddr, info, 0, POWERPC_DIALECT(info));
150 /* Print a POWER (RS/6000) instruction. */
153 print_insn_rs6000 (bfd_vma memaddr, struct disassemble_info *info)
155 return print_insn_powerpc (memaddr, info, 1, PPC_OPCODE_POWER);
158 /* Extract the operand value from the PowerPC or POWER instruction. */
161 operand_value_powerpc (const struct powerpc_operand *operand,
162 unsigned long insn, ppc_cpu_t dialect)
166 /* Extract the value from the instruction. */
167 if (operand->extract)
168 value = (*operand->extract) (insn, dialect, &invalid);
171 value = (insn >> operand->shift) & operand->bitm;
172 if ((operand->flags & PPC_OPERAND_SIGNED) != 0)
174 /* BITM is always some number of zeros followed by some
175 number of ones, followed by some numer of zeros. */
176 unsigned long top = operand->bitm;
177 /* top & -top gives the rightmost 1 bit, so this
178 fills in any trailing zeros. */
179 top |= (top & -top) - 1;
181 value = (value ^ top) - top;
188 /* Determine whether the optional operand(s) should be printed. */
191 skip_optional_operands (const unsigned char *opindex,
192 unsigned long insn, ppc_cpu_t dialect)
194 const struct powerpc_operand *operand;
196 for (; *opindex != 0; opindex++)
198 operand = &powerpc_operands[*opindex];
199 if ((operand->flags & PPC_OPERAND_NEXT) != 0
200 || ((operand->flags & PPC_OPERAND_OPTIONAL) != 0
201 && operand_value_powerpc (operand, insn, dialect) != 0))
208 /* Print a PowerPC or POWER instruction. */
211 print_insn_powerpc (bfd_vma memaddr,
212 struct disassemble_info *info,
219 const struct powerpc_opcode *opcode;
220 const struct powerpc_opcode *opcode_end;
223 status = (*info->read_memory_func) (memaddr, buffer, 4, info);
226 (*info->memory_error_func) (status, memaddr, info);
231 insn = bfd_getb32 (buffer);
233 insn = bfd_getl32 (buffer);
235 /* Get the major opcode of the instruction. */
238 /* Find the first match in the opcode table. We could speed this up
239 a bit by doing a binary search on the major opcode. */
240 opcode_end = powerpc_opcodes + powerpc_num_opcodes;
242 for (opcode = powerpc_opcodes; opcode < opcode_end; opcode++)
244 unsigned long table_op;
245 const unsigned char *opindex;
246 const struct powerpc_operand *operand;
252 table_op = PPC_OP (opcode->opcode);
258 if ((insn & opcode->mask) != opcode->opcode
259 || (opcode->flags & dialect) == 0)
262 /* Make two passes over the operands. First see if any of them
263 have extraction functions, and, if they do, make sure the
264 instruction is valid. */
266 for (opindex = opcode->operands; *opindex != 0; opindex++)
268 operand = powerpc_operands + *opindex;
269 if (operand->extract)
270 (*operand->extract) (insn, dialect, &invalid);
275 /* The instruction is valid. */
276 if (opcode->operands[0] != 0)
277 (*info->fprintf_func) (info->stream, "%-7s ", opcode->name);
279 (*info->fprintf_func) (info->stream, "%s", opcode->name);
281 /* Now extract and print the operands. */
285 for (opindex = opcode->operands; *opindex != 0; opindex++)
289 operand = powerpc_operands + *opindex;
291 /* Operands that are marked FAKE are simply ignored. We
292 already made sure that the extract function considered
293 the instruction to be valid. */
294 if ((operand->flags & PPC_OPERAND_FAKE) != 0)
297 /* If all of the optional operands have the value zero,
298 then don't print any of them. */
299 if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0)
301 if (skip_optional < 0)
302 skip_optional = skip_optional_operands (opindex, insn,
308 value = operand_value_powerpc (operand, insn, dialect);
312 (*info->fprintf_func) (info->stream, ",");
316 /* Print the operand as directed by the flags. */
317 if ((operand->flags & PPC_OPERAND_GPR) != 0
318 || ((operand->flags & PPC_OPERAND_GPR_0) != 0 && value != 0))
319 (*info->fprintf_func) (info->stream, "r%ld", value);
320 else if ((operand->flags & PPC_OPERAND_FPR) != 0)
321 (*info->fprintf_func) (info->stream, "f%ld", value);
322 else if ((operand->flags & PPC_OPERAND_VR) != 0)
323 (*info->fprintf_func) (info->stream, "v%ld", value);
324 else if ((operand->flags & PPC_OPERAND_RELATIVE) != 0)
325 (*info->print_address_func) (memaddr + value, info);
326 else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0)
327 (*info->print_address_func) ((bfd_vma) value & 0xffffffff, info);
328 else if ((operand->flags & PPC_OPERAND_CR) == 0
329 || (dialect & PPC_OPCODE_PPC) == 0)
330 (*info->fprintf_func) (info->stream, "%ld", value);
331 else if ((operand->flags & PPC_OPERAND_FSL) != 0)
332 (*info->fprintf_func) (info->stream, "fsl%ld", value);
333 else if ((operand->flags & PPC_OPERAND_FCR) != 0)
334 (*info->fprintf_func) (info->stream, "fcr%ld", value);
335 else if ((operand->flags & PPC_OPERAND_UDI) != 0)
336 (*info->fprintf_func) (info->stream, "%ld", value);
339 if (operand->bitm == 7)
340 (*info->fprintf_func) (info->stream, "cr%ld", value);
343 static const char *cbnames[4] = { "lt", "gt", "eq", "so" };
349 (*info->fprintf_func) (info->stream, "4*cr%d+", cr);
351 (*info->fprintf_func) (info->stream, "%s", cbnames[cc]);
357 (*info->fprintf_func) (info->stream, ")");
361 if ((operand->flags & PPC_OPERAND_PARENS) == 0)
365 (*info->fprintf_func) (info->stream, "(");
370 /* We have found and printed an instruction; return. */
374 if ((dialect & PPC_OPCODE_ANY) != 0)
376 dialect = ~PPC_OPCODE_ANY;
380 /* We could not find a match. */
381 (*info->fprintf_func) (info->stream, ".long 0x%lx", insn);
387 print_ppc_disassembler_options (FILE *stream)
389 fprintf (stream, "\n\
390 The following PPC specific disassembler options are supported for use with\n\
393 fprintf (stream, " booke|booke32|booke64 Disassemble the BookE instructions\n");
394 fprintf (stream, " e300 Disassemble the e300 instructions\n");
395 fprintf (stream, " e500|e500x2 Disassemble the e500 instructions\n");
396 fprintf (stream, " e500mc Disassemble the e500mc instructions\n");
397 fprintf (stream, " 440 Disassemble the 440 instructions\n");
398 fprintf (stream, " 464 Disassemble the 464 instructions\n");
399 fprintf (stream, " efs Disassemble the EFS instructions\n");
400 fprintf (stream, " ppcps Disassemble the PowerPC paired singles instructions\n");
401 fprintf (stream, " power4 Disassemble the Power4 instructions\n");
402 fprintf (stream, " power5 Disassemble the Power5 instructions\n");
403 fprintf (stream, " power6 Disassemble the Power6 instructions\n");
404 fprintf (stream, " 32 Do not disassemble 64-bit instructions\n");
405 fprintf (stream, " 64 Allow disassembly of 64-bit instructions\n");