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
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)
34 static int print_insn_powerpc (bfd_vma, struct disassemble_info *, int, int);
36 /* Determine which set of machines to disassemble for. PPC403/601 or
37 BookE. For convenience, also disassemble instructions supported
38 by the AltiVec vector unit. */
41 powerpc_dialect (struct disassemble_info *info)
43 int dialect = PPC_OPCODE_PPC;
45 if (BFD_DEFAULT_TARGET_SIZE == 64)
46 dialect |= PPC_OPCODE_64;
48 if (info->disassembler_options
49 && strstr (info->disassembler_options, "ppcps") != NULL)
50 dialect |= PPC_OPCODE_PPCPS;
51 else if (info->disassembler_options
52 && strstr (info->disassembler_options, "booke") != NULL)
53 dialect |= PPC_OPCODE_BOOKE | PPC_OPCODE_BOOKE64;
54 else if ((info->mach == bfd_mach_ppc_e500)
55 || (info->disassembler_options
56 && strstr (info->disassembler_options, "e500") != NULL))
57 dialect |= (PPC_OPCODE_BOOKE
58 | PPC_OPCODE_SPE | PPC_OPCODE_ISEL
59 | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK
60 | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK
62 else if (info->disassembler_options
63 && strstr (info->disassembler_options, "efs") != NULL)
64 dialect |= PPC_OPCODE_EFS;
65 else if (info->disassembler_options
66 && strstr (info->disassembler_options, "e300") != NULL)
67 dialect |= PPC_OPCODE_E300 | PPC_OPCODE_CLASSIC | PPC_OPCODE_COMMON;
68 else if (info->disassembler_options
69 && strstr (info->disassembler_options, "440") != NULL)
70 dialect |= PPC_OPCODE_BOOKE | PPC_OPCODE_32
71 | PPC_OPCODE_440 | PPC_OPCODE_ISEL | PPC_OPCODE_RFMCI;
73 dialect |= (PPC_OPCODE_403 | PPC_OPCODE_601 | PPC_OPCODE_CLASSIC
74 | PPC_OPCODE_COMMON | PPC_OPCODE_ALTIVEC);
76 if (info->disassembler_options
77 && strstr (info->disassembler_options, "power4") != NULL)
78 dialect |= PPC_OPCODE_POWER4;
80 if (info->disassembler_options
81 && strstr (info->disassembler_options, "power5") != NULL)
82 dialect |= PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5;
84 if (info->disassembler_options
85 && strstr (info->disassembler_options, "cell") != NULL)
86 dialect |= PPC_OPCODE_POWER4 | PPC_OPCODE_CELL | PPC_OPCODE_ALTIVEC;
88 if (info->disassembler_options
89 && strstr (info->disassembler_options, "power6") != NULL)
90 dialect |= PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_ALTIVEC;
92 if (info->disassembler_options
93 && strstr (info->disassembler_options, "any") != NULL)
94 dialect |= PPC_OPCODE_ANY;
96 if (info->disassembler_options)
98 if (strstr (info->disassembler_options, "32") != NULL)
99 dialect &= ~PPC_OPCODE_64;
100 else if (strstr (info->disassembler_options, "64") != NULL)
101 dialect |= PPC_OPCODE_64;
104 info->private_data = (char *) 0 + dialect;
108 /* Print a big endian PowerPC instruction. */
111 print_insn_big_powerpc (bfd_vma memaddr, struct disassemble_info *info)
113 int dialect = (char *) info->private_data - (char *) 0;
114 return print_insn_powerpc (memaddr, info, 1, dialect);
117 /* Print a little endian PowerPC instruction. */
120 print_insn_little_powerpc (bfd_vma memaddr, struct disassemble_info *info)
122 int dialect = (char *) info->private_data - (char *) 0;
123 return print_insn_powerpc (memaddr, info, 0, dialect);
126 /* Print a POWER (RS/6000) instruction. */
129 print_insn_rs6000 (bfd_vma memaddr, struct disassemble_info *info)
131 return print_insn_powerpc (memaddr, info, 1, PPC_OPCODE_POWER);
134 /* Extract the operand value from the PowerPC or POWER instruction. */
137 operand_value_powerpc (const struct powerpc_operand *operand,
138 unsigned long insn, int dialect)
142 /* Extract the value from the instruction. */
143 if (operand->extract)
144 value = (*operand->extract) (insn, dialect, &invalid);
147 value = (insn >> operand->shift) & operand->bitm;
148 if ((operand->flags & PPC_OPERAND_SIGNED) != 0)
150 /* BITM is always some number of zeros followed by some
151 number of ones, followed by some numer of zeros. */
152 unsigned long top = operand->bitm;
153 /* top & -top gives the rightmost 1 bit, so this
154 fills in any trailing zeros. */
155 top |= (top & -top) - 1;
157 value = (value ^ top) - top;
164 /* Determine whether the optional operand(s) should be printed. */
167 skip_optional_operands (const unsigned char *opindex,
168 unsigned long insn, int dialect)
170 const struct powerpc_operand *operand;
172 for (; *opindex != 0; opindex++)
174 operand = &powerpc_operands[*opindex];
175 if ((operand->flags & PPC_OPERAND_NEXT) != 0
176 || ((operand->flags & PPC_OPERAND_OPTIONAL) != 0
177 && operand_value_powerpc (operand, insn, dialect) != 0))
184 /* Print a PowerPC or POWER instruction. */
187 print_insn_powerpc (bfd_vma memaddr,
188 struct disassemble_info *info,
195 const struct powerpc_opcode *opcode;
196 const struct powerpc_opcode *opcode_end;
200 dialect = powerpc_dialect (info);
202 status = (*info->read_memory_func) (memaddr, buffer, 4, info);
205 (*info->memory_error_func) (status, memaddr, info);
210 insn = bfd_getb32 (buffer);
212 insn = bfd_getl32 (buffer);
214 /* Get the major opcode of the instruction. */
217 /* Find the first match in the opcode table. We could speed this up
218 a bit by doing a binary search on the major opcode. */
219 opcode_end = powerpc_opcodes + powerpc_num_opcodes;
221 for (opcode = powerpc_opcodes; opcode < opcode_end; opcode++)
223 unsigned long table_op;
224 const unsigned char *opindex;
225 const struct powerpc_operand *operand;
231 table_op = PPC_OP (opcode->opcode);
237 if ((insn & opcode->mask) != opcode->opcode
238 || (opcode->flags & dialect) == 0)
241 /* Make two passes over the operands. First see if any of them
242 have extraction functions, and, if they do, make sure the
243 instruction is valid. */
245 for (opindex = opcode->operands; *opindex != 0; opindex++)
247 operand = powerpc_operands + *opindex;
248 if (operand->extract)
249 (*operand->extract) (insn, dialect, &invalid);
254 /* The instruction is valid. */
255 if (opcode->operands[0] != 0)
256 (*info->fprintf_func) (info->stream, "%-7s ", opcode->name);
258 (*info->fprintf_func) (info->stream, "%s", opcode->name);
260 /* Now extract and print the operands. */
264 for (opindex = opcode->operands; *opindex != 0; opindex++)
268 operand = powerpc_operands + *opindex;
270 /* Operands that are marked FAKE are simply ignored. We
271 already made sure that the extract function considered
272 the instruction to be valid. */
273 if ((operand->flags & PPC_OPERAND_FAKE) != 0)
276 /* If all of the optional operands have the value zero,
277 then don't print any of them. */
278 if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0)
280 if (skip_optional < 0)
281 skip_optional = skip_optional_operands (opindex, insn,
287 value = operand_value_powerpc (operand, insn, dialect);
291 (*info->fprintf_func) (info->stream, ",");
295 /* Print the operand as directed by the flags. */
296 if ((operand->flags & PPC_OPERAND_GPR) != 0
297 || ((operand->flags & PPC_OPERAND_GPR_0) != 0 && value != 0))
298 (*info->fprintf_func) (info->stream, "r%ld", value);
299 else if ((operand->flags & PPC_OPERAND_FPR) != 0)
300 (*info->fprintf_func) (info->stream, "f%ld", value);
301 else if ((operand->flags & PPC_OPERAND_VR) != 0)
302 (*info->fprintf_func) (info->stream, "v%ld", value);
303 else if ((operand->flags & PPC_OPERAND_RELATIVE) != 0)
304 (*info->print_address_func) (memaddr + value, info);
305 else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0)
306 (*info->print_address_func) ((bfd_vma) value & 0xffffffff, info);
307 else if ((operand->flags & PPC_OPERAND_CR) == 0
308 || (dialect & PPC_OPCODE_PPC) == 0)
309 (*info->fprintf_func) (info->stream, "%ld", value);
312 if (operand->bitm == 7)
313 (*info->fprintf_func) (info->stream, "cr%ld", value);
316 static const char *cbnames[4] = { "lt", "gt", "eq", "so" };
322 (*info->fprintf_func) (info->stream, "4*cr%d+", cr);
324 (*info->fprintf_func) (info->stream, "%s", cbnames[cc]);
330 (*info->fprintf_func) (info->stream, ")");
334 if ((operand->flags & PPC_OPERAND_PARENS) == 0)
338 (*info->fprintf_func) (info->stream, "(");
343 /* We have found and printed an instruction; return. */
347 if ((dialect & PPC_OPCODE_ANY) != 0)
349 dialect = ~PPC_OPCODE_ANY;
353 /* We could not find a match. */
354 (*info->fprintf_func) (info->stream, ".long 0x%lx", insn);
360 print_ppc_disassembler_options (FILE *stream)
362 fprintf (stream, "\n\
363 The following PPC specific disassembler options are supported for use with\n\
366 fprintf (stream, " booke|booke32|booke64 Disassemble the BookE instructions\n");
367 fprintf (stream, " e300 Disassemble the e300 instructions\n");
368 fprintf (stream, " e500|e500x2 Disassemble the e500 instructions\n");
369 fprintf (stream, " 440 Disassemble the 440 instructions\n");
370 fprintf (stream, " efs Disassemble the EFS instructions\n");
371 fprintf (stream, " ppcps Disassemble the PowerPC paired singles instructions\n");
372 fprintf (stream, " power4 Disassemble the Power4 instructions\n");
373 fprintf (stream, " power5 Disassemble the Power5 instructions\n");
374 fprintf (stream, " power6 Disassemble the Power6 instructions\n");
375 fprintf (stream, " 32 Do not disassemble 64-bit instructions\n");
376 fprintf (stream, " 64 Allow disassembly of 64-bit instructions\n");