1 /* ppc-dis.c -- Disassemble PowerPC instructions
2 Copyright 1994, 1995, 2000, 2001, 2002 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support
5 This file is part of GDB, GAS, and the GNU binutils.
7 GDB, GAS, and the GNU binutils are free software; you can redistribute
8 them and/or modify them under the terms of the GNU General Public
9 License as published by the Free Software Foundation; either version
10 2, or (at your option) any later version.
12 GDB, GAS, and the GNU binutils are distributed in the hope that they
13 will be useful, but WITHOUT ANY WARRANTY; without even the implied
14 warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 the GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this file; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 typedef unsigned char u1;
23 typedef unsigned int u4;
24 typedef signed int s4;
32 unsigned long bfd_getb32(void *);
33 unsigned long bfd_getl32(void *);
35 /* This file provides several disassembler functions, all of which use
36 the disassembler interface defined in dis-asm.h. Several functions
37 are provided because this file handles disassembly for the PowerPC
38 in both big and little endian mode and also for the POWER (RS/6000)
41 static int print_insn_powerpc PARAMS ((bfd_vma, struct disassemble_info *,
42 int bigendian, int dialect));
44 static int powerpc_dialect PARAMS ((struct disassemble_info *));
46 /* Determine which set of machines to disassemble for. PPC403/601 or
47 BookE. For convenience, also disassemble instructions supported
48 by the AltiVec vector unit. */
52 struct disassemble_info *info;
54 int dialect = PPC_OPCODE_PPC | PPC_OPCODE_ALTIVEC;
57 if (BFD_DEFAULT_TARGET_SIZE == 64)
58 dialect |= PPC_OPCODE_64;
61 if (info->disassembler_options
62 && (strcmp (info->disassembler_options, "booke") == 0
63 || strcmp (info->disassembler_options, "booke32") == 0
64 || strcmp (info->disassembler_options, "booke64") == 0))
65 dialect |= PPC_OPCODE_BOOKE | PPC_OPCODE_BOOKE64;
68 || (info->disassembler_options
69 && ( strcmp (info->disassembler_options, "e500") == 0
70 || strcmp (info->disassembler_options, "e500x2") == 0)))
72 dialect |= PPC_OPCODE_BOOKE
73 | PPC_OPCODE_SPE | PPC_OPCODE_ISEL
74 | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK
75 | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK
77 /* efs* and AltiVec conflict. */
78 dialect &= ~PPC_OPCODE_ALTIVEC;
81 if (info->disassembler_options
82 && (strcmp (info->disassembler_options, "efs") == 0))
84 dialect |= PPC_OPCODE_EFS;
85 /* efs* and AltiVec conflict. */
86 dialect &= ~PPC_OPCODE_ALTIVEC;
89 dialect |= PPC_OPCODE_403 | PPC_OPCODE_601 | PPC_OPCODE_COMMON;
91 if (info->disassembler_options
92 && strcmp (info->disassembler_options, "power4") == 0)
93 dialect |= PPC_OPCODE_POWER4;
95 if (info->disassembler_options)
97 if (strstr (info->disassembler_options, "32") != NULL)
98 dialect &= ~PPC_OPCODE_64;
99 else if (strstr (info->disassembler_options, "64") != NULL)
100 dialect |= PPC_OPCODE_64;
106 /* Print a big endian PowerPC instruction. */
109 print_insn_big_powerpc (memaddr, info)
111 struct disassemble_info *info;
113 return print_insn_powerpc (memaddr, info, 1, powerpc_dialect(info));
116 /* Print a little endian PowerPC instruction. */
119 print_insn_little_powerpc (memaddr, info)
121 struct disassemble_info *info;
123 return print_insn_powerpc (memaddr, info, 0, powerpc_dialect(info));
126 /* Print a POWER (RS/6000) instruction. */
129 print_insn_rs6000 (memaddr, info)
131 struct disassemble_info *info;
133 return print_insn_powerpc (memaddr, info, 1, PPC_OPCODE_POWER);
136 /* Print a PowerPC or POWER instruction. */
139 print_insn_powerpc (memaddr, info, bigendian, dialect)
141 struct disassemble_info *info;
148 const struct powerpc_opcode *opcode;
149 const struct powerpc_opcode *opcode_end;
152 status = (*info->read_memory_func) (memaddr, buffer, 4, info);
155 (*info->memory_error_func) (status, memaddr, info);
160 insn = bfd_getb32 (buffer);
162 insn = bfd_getl32 (buffer);
164 /* Get the major opcode of the instruction. */
167 /* Find the first match in the opcode table. We could speed this up
168 a bit by doing a binary search on the major opcode. */
169 opcode_end = powerpc_opcodes + powerpc_num_opcodes;
170 for (opcode = powerpc_opcodes; opcode < opcode_end; opcode++)
172 unsigned long table_op;
173 const unsigned char *opindex;
174 const struct powerpc_operand *operand;
179 table_op = PPC_OP (opcode->opcode);
185 if ((insn & opcode->mask) != opcode->opcode
186 || (opcode->flags & dialect) == 0)
189 if ((dialect & PPC_OPCODE_EFS) && (opcode->flags & PPC_OPCODE_ALTIVEC))
192 /* Make two passes over the operands. First see if any of them
193 have extraction functions, and, if they do, make sure the
194 instruction is valid. */
196 for (opindex = opcode->operands; *opindex != 0; opindex++)
198 operand = powerpc_operands + *opindex;
199 if (operand->extract)
200 (*operand->extract) (insn, dialect, &invalid);
205 /* The instruction is valid. */
206 (*info->fprintf_func) (info->stream, "%s", opcode->name);
207 if (opcode->operands[0] != 0)
208 (*info->fprintf_func) (info->stream, "\t");
210 /* Now extract and print the operands. */
213 for (opindex = opcode->operands; *opindex != 0; opindex++)
217 operand = powerpc_operands + *opindex;
219 /* Operands that are marked FAKE are simply ignored. We
220 already made sure that the extract function considered
221 the instruction to be valid. */
222 if ((operand->flags & PPC_OPERAND_FAKE) != 0)
225 /* Extract the value from the instruction. */
226 if (operand->extract)
227 value = (*operand->extract) (insn, dialect, (int *) NULL);
230 value = (insn >> operand->shift) & ((1 << operand->bits) - 1);
231 if ((operand->flags & PPC_OPERAND_SIGNED) != 0
232 && (value & (1 << (operand->bits - 1))) != 0)
233 value -= 1 << operand->bits;
236 /* If the operand is optional, and the value is zero, don't
238 if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0
239 && (operand->flags & PPC_OPERAND_NEXT) == 0
245 (*info->fprintf_func) (info->stream, ",");
249 /* Print the operand as directed by the flags. */
250 if ((operand->flags & PPC_OPERAND_GPR) != 0)
251 (*info->fprintf_func) (info->stream, "r%ld", value);
252 else if ((operand->flags & PPC_OPERAND_FPR) != 0)
253 (*info->fprintf_func) (info->stream, "f%ld", value);
254 else if ((operand->flags & PPC_OPERAND_VR) != 0)
255 (*info->fprintf_func) (info->stream, "v%ld", value);
256 else if ((operand->flags & PPC_OPERAND_RELATIVE) != 0)
257 (*info->print_address_func) (memaddr + value, info);
258 else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0)
259 (*info->print_address_func) ((bfd_vma) value & 0xffffffff, info);
260 else if ((operand->flags & PPC_OPERAND_CR) == 0
261 || (dialect & PPC_OPCODE_PPC) == 0)
262 (*info->fprintf_func) (info->stream, "%ld", value);
265 if (operand->bits == 3)
266 (*info->fprintf_func) (info->stream, "cr%d", value);
269 static const char *cbnames[4] = { "lt", "gt", "eq", "so" };
275 (*info->fprintf_func) (info->stream, "4*cr%d", cr);
280 (*info->fprintf_func) (info->stream, "+");
281 (*info->fprintf_func) (info->stream, "%s", cbnames[cc]);
288 (*info->fprintf_func) (info->stream, ")");
292 if ((operand->flags & PPC_OPERAND_PARENS) == 0)
296 (*info->fprintf_func) (info->stream, "(");
301 /* We have found and printed an instruction; return. */
305 /* We could not find a match. */
306 (*info->fprintf_func) (info->stream, ".long 0x%lx", insn);