1 /* ppc-dis.c -- Disassemble PowerPC instructions
2 Copyright 1994, 1995, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support
6 This file is part of GDB, GAS, and the GNU binutils.
8 GDB, GAS, and the GNU binutils are free software; you can redistribute
9 them and/or modify them under the terms of the GNU General Public
10 License as published by the Free Software Foundation; either version
11 2, or (at your option) any later version.
13 GDB, GAS, and the GNU binutils are distributed in the hope that they
14 will be useful, but WITHOUT ANY WARRANTY; without even the implied
15 warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
16 the GNU General Public 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 Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
25 #include "opcode/ppc.h"
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)
33 static int print_insn_powerpc (bfd_vma, struct disassemble_info *, int, int);
36 /* Stash the result of parsing disassembler_options here. */
40 /* Determine which set of machines to disassemble for. PPC403/601 or
41 BookE. For convenience, also disassemble instructions supported
42 by the AltiVec vector unit. */
45 powerpc_dialect (struct disassemble_info *info)
47 int dialect = PPC_OPCODE_PPC;
49 if (BFD_DEFAULT_TARGET_SIZE == 64)
50 dialect |= PPC_OPCODE_64;
52 if (info->disassembler_options
53 && strstr (info->disassembler_options, "booke") != NULL)
54 dialect |= PPC_OPCODE_BOOKE | PPC_OPCODE_BOOKE64;
55 else if ((info->mach == bfd_mach_ppc_e500)
56 || (info->disassembler_options
57 && strstr (info->disassembler_options, "e500") != NULL))
58 dialect |= (PPC_OPCODE_BOOKE
59 | PPC_OPCODE_SPE | PPC_OPCODE_ISEL
60 | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK
61 | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK
63 else if (info->disassembler_options
64 && strstr (info->disassembler_options, "efs") != NULL)
65 dialect |= PPC_OPCODE_EFS;
67 dialect |= (PPC_OPCODE_403 | PPC_OPCODE_601 | PPC_OPCODE_CLASSIC
68 | PPC_OPCODE_COMMON | PPC_OPCODE_ALTIVEC);
70 if (info->disassembler_options
71 && strstr (info->disassembler_options, "power4") != NULL)
72 dialect |= PPC_OPCODE_POWER4;
74 if (info->disassembler_options
75 && strstr (info->disassembler_options, "power5") != NULL)
76 dialect |= PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5;
78 if (info->disassembler_options
79 && strstr (info->disassembler_options, "any") != NULL)
80 dialect |= PPC_OPCODE_ANY;
82 if (info->disassembler_options)
84 if (strstr (info->disassembler_options, "32") != NULL)
85 dialect &= ~PPC_OPCODE_64;
86 else if (strstr (info->disassembler_options, "64") != NULL)
87 dialect |= PPC_OPCODE_64;
90 ((struct dis_private *) &info->private_data)->dialect = dialect;
94 /* Print a big endian PowerPC instruction. */
97 print_insn_big_powerpc (bfd_vma memaddr, struct disassemble_info *info)
99 int dialect = ((struct dis_private *) &info->private_data)->dialect;
100 return print_insn_powerpc (memaddr, info, 1, dialect);
103 /* Print a little endian PowerPC instruction. */
106 print_insn_little_powerpc (bfd_vma memaddr, struct disassemble_info *info)
108 int dialect = ((struct dis_private *) &info->private_data)->dialect;
109 return print_insn_powerpc (memaddr, info, 0, dialect);
112 /* Print a POWER (RS/6000) instruction. */
115 print_insn_rs6000 (bfd_vma memaddr, struct disassemble_info *info)
117 return print_insn_powerpc (memaddr, info, 1, PPC_OPCODE_POWER);
120 /* Print a PowerPC or POWER instruction. */
123 print_insn_powerpc (bfd_vma memaddr,
124 struct disassemble_info *info,
131 const struct powerpc_opcode *opcode;
132 const struct powerpc_opcode *opcode_end;
136 dialect = powerpc_dialect (info);
138 status = (*info->read_memory_func) (memaddr, buffer, 4, info);
141 (*info->memory_error_func) (status, memaddr, info);
146 insn = bfd_getb32 (buffer);
148 insn = bfd_getl32 (buffer);
150 /* Get the major opcode of the instruction. */
153 /* Find the first match in the opcode table. We could speed this up
154 a bit by doing a binary search on the major opcode. */
155 opcode_end = powerpc_opcodes + powerpc_num_opcodes;
157 for (opcode = powerpc_opcodes; opcode < opcode_end; opcode++)
159 unsigned long table_op;
160 const unsigned char *opindex;
161 const struct powerpc_operand *operand;
166 table_op = PPC_OP (opcode->opcode);
172 if ((insn & opcode->mask) != opcode->opcode
173 || (opcode->flags & dialect) == 0)
176 /* Make two passes over the operands. First see if any of them
177 have extraction functions, and, if they do, make sure the
178 instruction is valid. */
180 for (opindex = opcode->operands; *opindex != 0; opindex++)
182 operand = powerpc_operands + *opindex;
183 if (operand->extract)
184 (*operand->extract) (insn, dialect, &invalid);
189 /* The instruction is valid. */
190 if (opcode->operands[0] != 0)
191 (*info->fprintf_func) (info->stream, "%-7s ", opcode->name);
193 (*info->fprintf_func) (info->stream, "%s", opcode->name);
195 /* Now extract and print the operands. */
198 for (opindex = opcode->operands; *opindex != 0; opindex++)
202 operand = powerpc_operands + *opindex;
204 /* Operands that are marked FAKE are simply ignored. We
205 already made sure that the extract function considered
206 the instruction to be valid. */
207 if ((operand->flags & PPC_OPERAND_FAKE) != 0)
210 /* Extract the value from the instruction. */
211 if (operand->extract)
212 value = (*operand->extract) (insn, dialect, &invalid);
215 value = (insn >> operand->shift) & ((1 << operand->bits) - 1);
216 if ((operand->flags & PPC_OPERAND_SIGNED) != 0
217 && (value & (1 << (operand->bits - 1))) != 0)
218 value -= 1 << operand->bits;
221 /* If the operand is optional, and the value is zero, don't
223 if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0
224 && (operand->flags & PPC_OPERAND_NEXT) == 0
230 (*info->fprintf_func) (info->stream, ",");
234 /* Print the operand as directed by the flags. */
235 if ((operand->flags & PPC_OPERAND_GPR) != 0
236 || ((operand->flags & PPC_OPERAND_GPR_0) != 0 && value != 0))
237 (*info->fprintf_func) (info->stream, "r%ld", value);
238 else if ((operand->flags & PPC_OPERAND_FPR) != 0)
239 (*info->fprintf_func) (info->stream, "f%ld", value);
240 else if ((operand->flags & PPC_OPERAND_VR) != 0)
241 (*info->fprintf_func) (info->stream, "v%ld", value);
242 else if ((operand->flags & PPC_OPERAND_RELATIVE) != 0)
243 (*info->print_address_func) (memaddr + value, info);
244 else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0)
245 (*info->print_address_func) ((bfd_vma) value & 0xffffffff, info);
246 else if ((operand->flags & PPC_OPERAND_CR) == 0
247 || (dialect & PPC_OPCODE_PPC) == 0)
248 (*info->fprintf_func) (info->stream, "%ld", value);
251 if (operand->bits == 3)
252 (*info->fprintf_func) (info->stream, "cr%ld", value);
255 static const char *cbnames[4] = { "lt", "gt", "eq", "so" };
261 (*info->fprintf_func) (info->stream, "4*cr%d+", cr);
263 (*info->fprintf_func) (info->stream, "%s", cbnames[cc]);
269 (*info->fprintf_func) (info->stream, ")");
273 if ((operand->flags & PPC_OPERAND_PARENS) == 0)
277 (*info->fprintf_func) (info->stream, "(");
282 /* We have found and printed an instruction; return. */
286 if ((dialect & PPC_OPCODE_ANY) != 0)
288 dialect = ~PPC_OPCODE_ANY;
292 /* We could not find a match. */
293 (*info->fprintf_func) (info->stream, ".long 0x%lx", insn);
299 print_ppc_disassembler_options (FILE *stream)
301 fprintf (stream, "\n\
302 The following PPC specific disassembler options are supported for use with\n\
305 fprintf (stream, " booke|booke32|booke64 Disassemble the BookE instructions\n");
306 fprintf (stream, " e500|e500x2 Disassemble the e500 instructions\n");
307 fprintf (stream, " efs Disassemble the EFS instructions\n");
308 fprintf (stream, " power4 Disassemble the Power4 instructions\n");
309 fprintf (stream, " power5 Disassemble the Power5 instructions\n");
310 fprintf (stream, " 32 Do not disassemble 64-bit instructions\n");
311 fprintf (stream, " 64 Allow disassembly of 64-bit instructions\n");