2 /* ppc-dis.c -- Disassemble PowerPC instructions
3 Copyright 1994, 1995, 2000, 2001, 2002, 2003, 2004
4 Free Software Foundation, Inc.
5 Written by Ian Lance Taylor, Cygnus Support
7 This file is part of GDB, GAS, and the GNU binutils.
9 GDB, GAS, and the GNU binutils are free software; you can redistribute
10 them and/or modify them under the terms of the GNU General Public
11 License as published by the Free Software Foundation; either version
12 2, or (at your option) any later version.
14 GDB, GAS, and the GNU binutils are distributed in the hope that they
15 will be useful, but WITHOUT ANY WARRANTY; without even the implied
16 warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 the GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this file; see the file COPYING. If not, write to the Free
21 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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);
37 /* Stash the result of parsing disassembler_options here. */
41 /* Determine which set of machines to disassemble for. PPC403/601 or
42 BookE. For convenience, also disassemble instructions supported
43 by the AltiVec vector unit. */
46 powerpc_dialect (struct disassemble_info *info)
48 int dialect = PPC_OPCODE_PPC | PPC_OPCODE_ALTIVEC;
49 void *pd = &info->private_data;
51 if (BFD_DEFAULT_TARGET_SIZE == 64)
52 dialect |= PPC_OPCODE_64;
54 if (info->disassembler_options
55 && strstr (info->disassembler_options, "booke") != NULL)
56 dialect |= PPC_OPCODE_BOOKE | PPC_OPCODE_BOOKE64;
57 else if ((info->mach == bfd_mach_ppc_e500)
58 || (info->disassembler_options
59 && strstr (info->disassembler_options, "e500") != NULL))
61 dialect |= PPC_OPCODE_BOOKE
62 | PPC_OPCODE_SPE | PPC_OPCODE_ISEL
63 | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK
64 | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK
66 /* efs* and AltiVec conflict. */
67 dialect &= ~PPC_OPCODE_ALTIVEC;
69 else if (info->disassembler_options
70 && strstr (info->disassembler_options, "efs") != NULL)
72 dialect |= PPC_OPCODE_EFS;
73 /* efs* and AltiVec conflict. */
74 dialect &= ~PPC_OPCODE_ALTIVEC;
77 dialect |= (PPC_OPCODE_403 | PPC_OPCODE_601 | PPC_OPCODE_CLASSIC
80 if (info->disassembler_options
81 && strstr (info->disassembler_options, "power4") != NULL)
82 dialect |= PPC_OPCODE_POWER4;
84 if (info->disassembler_options
85 && strstr (info->disassembler_options, "any") != NULL)
86 dialect |= PPC_OPCODE_ANY;
88 if (info->disassembler_options)
90 if (strstr (info->disassembler_options, "32") != NULL)
91 dialect &= ~PPC_OPCODE_64;
92 else if (strstr (info->disassembler_options, "64") != NULL)
93 dialect |= PPC_OPCODE_64;
96 ((struct dis_private *) pd)->dialect = dialect;
100 /* Print a big endian PowerPC instruction. */
103 print_insn_big_powerpc (bfd_vma memaddr, struct disassemble_info *info)
105 void *pd = &info->private_data;
106 int dialect = ((struct dis_private *) pd)->dialect;
107 return print_insn_powerpc (memaddr, info, 1, dialect);
110 /* Print a little endian PowerPC instruction. */
113 print_insn_little_powerpc (bfd_vma memaddr, struct disassemble_info *info)
115 void *pd = &info->private_data;
116 int dialect = ((struct dis_private *) pd)->dialect;
117 return print_insn_powerpc (memaddr, info, 0, dialect);
120 /* Print a POWER (RS/6000) instruction. */
123 print_insn_rs6000 (bfd_vma memaddr, struct disassemble_info *info)
125 return print_insn_powerpc (memaddr, info, 1, PPC_OPCODE_POWER);
128 /* Print a PowerPC or POWER instruction. */
131 print_insn_powerpc (bfd_vma memaddr,
132 struct disassemble_info *info,
139 const struct powerpc_opcode *opcode;
140 const struct powerpc_opcode *opcode_end;
144 dialect = powerpc_dialect (info);
146 status = (*info->read_memory_func) (memaddr, buffer, 4, info);
149 (*info->memory_error_func) (status, memaddr, info);
154 insn = bfd_getb32 (buffer);
156 insn = bfd_getl32 (buffer);
158 /* Get the major opcode of the instruction. */
161 /* Find the first match in the opcode table. We could speed this up
162 a bit by doing a binary search on the major opcode. */
163 opcode_end = powerpc_opcodes + powerpc_num_opcodes;
165 for (opcode = powerpc_opcodes; opcode < opcode_end; opcode++)
167 unsigned long table_op;
168 const unsigned char *opindex;
169 const struct powerpc_operand *operand;
174 table_op = PPC_OP (opcode->opcode);
180 if ((insn & opcode->mask) != opcode->opcode
181 || (opcode->flags & dialect) == 0)
184 /* Make two passes over the operands. First see if any of them
185 have extraction functions, and, if they do, make sure the
186 instruction is valid. */
188 for (opindex = opcode->operands; *opindex != 0; opindex++)
190 operand = powerpc_operands + *opindex;
191 if (operand->extract)
192 (*operand->extract) (insn, dialect, &invalid);
197 /* The instruction is valid. */
198 if (opcode->operands[0] != 0)
199 (*info->fprintf_func) (info->stream, "%-7s ", opcode->name);
201 (*info->fprintf_func) (info->stream, "%s", opcode->name);
203 /* Now extract and print the operands. */
206 for (opindex = opcode->operands; *opindex != 0; opindex++)
210 operand = powerpc_operands + *opindex;
212 /* Operands that are marked FAKE are simply ignored. We
213 already made sure that the extract function considered
214 the instruction to be valid. */
215 if ((operand->flags & PPC_OPERAND_FAKE) != 0)
218 /* Extract the value from the instruction. */
219 if (operand->extract)
220 value = (*operand->extract) (insn, dialect, &invalid);
223 value = (insn >> operand->shift) & ((1 << operand->bits) - 1);
224 if ((operand->flags & PPC_OPERAND_SIGNED) != 0
225 && (value & (1 << (operand->bits - 1))) != 0)
226 value -= 1 << operand->bits;
229 /* If the operand is optional, and the value is zero, don't
231 if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0
232 && (operand->flags & PPC_OPERAND_NEXT) == 0
238 (*info->fprintf_func) (info->stream, ",");
242 /* Print the operand as directed by the flags. */
243 if ((operand->flags & PPC_OPERAND_GPR) != 0
244 || ((operand->flags & PPC_OPERAND_GPR_0) != 0 && value != 0))
245 (*info->fprintf_func) (info->stream, "r%ld", value);
246 else if ((operand->flags & PPC_OPERAND_FPR) != 0)
247 (*info->fprintf_func) (info->stream, "f%ld", value);
248 else if ((operand->flags & PPC_OPERAND_VR) != 0)
249 (*info->fprintf_func) (info->stream, "v%ld", value);
250 else if ((operand->flags & PPC_OPERAND_RELATIVE) != 0)
251 (*info->print_address_func) (memaddr + value, info);
252 else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0)
253 (*info->print_address_func) ((bfd_vma) value & 0xffffffff, info);
254 else if ((operand->flags & PPC_OPERAND_CR) == 0
255 || (dialect & PPC_OPCODE_PPC) == 0)
256 (*info->fprintf_func) (info->stream, "%ld", value);
259 if (operand->bits == 3)
260 (*info->fprintf_func) (info->stream, "cr%d", value);
263 static const char *cbnames[4] = { "lt", "gt", "eq", "so" };
269 (*info->fprintf_func) (info->stream, "4*cr%d+", cr);
271 (*info->fprintf_func) (info->stream, "%s", cbnames[cc]);
277 (*info->fprintf_func) (info->stream, ")");
281 if ((operand->flags & PPC_OPERAND_PARENS) == 0)
285 (*info->fprintf_func) (info->stream, "(");
290 /* We have found and printed an instruction; return. */
294 if ((dialect & PPC_OPCODE_ANY) != 0)
296 dialect = ~PPC_OPCODE_ANY;
300 /* We could not find a match. */
301 (*info->fprintf_func) (info->stream, ".long 0x%lx", insn);
307 print_ppc_disassembler_options (FILE *stream)
309 fprintf (stream, "\n\
310 The following PPC specific disassembler options are supported for use with\n\
313 fprintf (stream, " booke|booke32|booke64 Disassemble the BookE instructions\n");
314 fprintf (stream, " e500|e500x2 Disassemble the e500 instructions\n");
315 fprintf (stream, " efs Disassemble the EFS instructions\n");
316 fprintf (stream, " power4 Disassemble the Power4 instructions\n");
317 fprintf (stream, " 32 Do not disassemble 64-bit instructions\n");
318 fprintf (stream, " 64 Allow disassembly of 64-bit instructions\n");