| /* ppc-dis.c -- Disassemble PowerPC instructions |
| Copyright 1994, 1995, 2000, 2001, 2002, 2003, 2004, 2005, 2006 |
| Free Software Foundation, Inc. |
| Written by Ian Lance Taylor, Cygnus Support |
| |
| This file is part of GDB, GAS, and the GNU binutils. |
| |
| GDB, GAS, and the GNU binutils are free software; you can redistribute |
| them and/or modify them under the terms of the GNU General Public |
| License as published by the Free Software Foundation; either version |
| 2, or (at your option) any later version. |
| |
| GDB, GAS, and the GNU binutils are distributed in the hope that they |
| will be useful, but WITHOUT ANY WARRANTY; without even the implied |
| warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| the GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this file; see the file COPYING. If not, write to the Free |
| Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| |
| #include <stdio.h> |
| #include "sysdep.h" |
| #include "dis-asm.h" |
| #include "opcode/ppc.h" |
| |
| /* This file provides several disassembler functions, all of which use |
| the disassembler interface defined in dis-asm.h. Several functions |
| are provided because this file handles disassembly for the PowerPC |
| in both big and little endian mode and also for the POWER (RS/6000) |
| chip. */ |
| |
| static int print_insn_powerpc (bfd_vma, struct disassemble_info *, int, int); |
| |
| /* Determine which set of machines to disassemble for. PPC403/601 or |
| BookE. For convenience, also disassemble instructions supported |
| by the AltiVec vector unit. */ |
| |
| static int |
| powerpc_dialect (struct disassemble_info *info) |
| { |
| int dialect = PPC_OPCODE_PPC; |
| |
| if (BFD_DEFAULT_TARGET_SIZE == 64) |
| dialect |= PPC_OPCODE_64; |
| |
| if (info->disassembler_options |
| && strstr (info->disassembler_options, "booke") != NULL) |
| dialect |= PPC_OPCODE_BOOKE | PPC_OPCODE_BOOKE64; |
| else if ((info->mach == bfd_mach_ppc_e500) |
| || (info->disassembler_options |
| && strstr (info->disassembler_options, "e500") != NULL)) |
| dialect |= (PPC_OPCODE_BOOKE |
| | PPC_OPCODE_SPE | PPC_OPCODE_ISEL |
| | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK |
| | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK |
| | PPC_OPCODE_RFMCI); |
| else if (info->disassembler_options |
| && strstr (info->disassembler_options, "efs") != NULL) |
| dialect |= PPC_OPCODE_EFS; |
| else if (info->disassembler_options |
| && strstr (info->disassembler_options, "e300") != NULL) |
| dialect |= PPC_OPCODE_E300 | PPC_OPCODE_CLASSIC | PPC_OPCODE_COMMON; |
| else |
| dialect |= (PPC_OPCODE_403 | PPC_OPCODE_601 | PPC_OPCODE_CLASSIC |
| | PPC_OPCODE_COMMON | PPC_OPCODE_ALTIVEC); |
| |
| if (info->disassembler_options |
| && strstr (info->disassembler_options, "power4") != NULL) |
| dialect |= PPC_OPCODE_POWER4; |
| |
| if (info->disassembler_options |
| && strstr (info->disassembler_options, "power5") != NULL) |
| dialect |= PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5; |
| |
| if (info->disassembler_options |
| && strstr (info->disassembler_options, "cell") != NULL) |
| dialect |= PPC_OPCODE_POWER4 | PPC_OPCODE_CELL | PPC_OPCODE_ALTIVEC; |
| |
| if (info->disassembler_options |
| && strstr (info->disassembler_options, "power6") != NULL) |
| dialect |= PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_ALTIVEC; |
| |
| if (info->disassembler_options |
| && strstr (info->disassembler_options, "any") != NULL) |
| dialect |= PPC_OPCODE_ANY; |
| |
| if (info->disassembler_options) |
| { |
| if (strstr (info->disassembler_options, "32") != NULL) |
| dialect &= ~PPC_OPCODE_64; |
| else if (strstr (info->disassembler_options, "64") != NULL) |
| dialect |= PPC_OPCODE_64; |
| } |
| |
| info->private_data = (char *) 0 + dialect; |
| return dialect; |
| } |
| |
| /* Print a big endian PowerPC instruction. */ |
| |
| int |
| print_insn_big_powerpc (bfd_vma memaddr, struct disassemble_info *info) |
| { |
| int dialect = (char *) info->private_data - (char *) 0; |
| return print_insn_powerpc (memaddr, info, 1, dialect); |
| } |
| |
| /* Print a little endian PowerPC instruction. */ |
| |
| int |
| print_insn_little_powerpc (bfd_vma memaddr, struct disassemble_info *info) |
| { |
| int dialect = (char *) info->private_data - (char *) 0; |
| return print_insn_powerpc (memaddr, info, 0, dialect); |
| } |
| |
| /* Print a POWER (RS/6000) instruction. */ |
| |
| int |
| print_insn_rs6000 (bfd_vma memaddr, struct disassemble_info *info) |
| { |
| return print_insn_powerpc (memaddr, info, 1, PPC_OPCODE_POWER); |
| } |
| |
| /* Print a PowerPC or POWER instruction. */ |
| |
| static int |
| print_insn_powerpc (bfd_vma memaddr, |
| struct disassemble_info *info, |
| int bigendian, |
| int dialect) |
| { |
| bfd_byte buffer[4]; |
| int status; |
| unsigned long insn; |
| const struct powerpc_opcode *opcode; |
| const struct powerpc_opcode *opcode_end; |
| unsigned long op; |
| |
| if (dialect == 0) |
| dialect = powerpc_dialect (info); |
| |
| status = (*info->read_memory_func) (memaddr, buffer, 4, info); |
| if (status != 0) |
| { |
| (*info->memory_error_func) (status, memaddr, info); |
| return -1; |
| } |
| |
| if (bigendian) |
| insn = bfd_getb32 (buffer); |
| else |
| insn = bfd_getl32 (buffer); |
| |
| /* Get the major opcode of the instruction. */ |
| op = PPC_OP (insn); |
| |
| /* Find the first match in the opcode table. We could speed this up |
| a bit by doing a binary search on the major opcode. */ |
| opcode_end = powerpc_opcodes + powerpc_num_opcodes; |
| again: |
| for (opcode = powerpc_opcodes; opcode < opcode_end; opcode++) |
| { |
| unsigned long table_op; |
| const unsigned char *opindex; |
| const struct powerpc_operand *operand; |
| int invalid; |
| int need_comma; |
| int need_paren; |
| |
| table_op = PPC_OP (opcode->opcode); |
| if (op < table_op) |
| break; |
| if (op > table_op) |
| continue; |
| |
| if ((insn & opcode->mask) != opcode->opcode |
| || (opcode->flags & dialect) == 0) |
| continue; |
| |
| /* Make two passes over the operands. First see if any of them |
| have extraction functions, and, if they do, make sure the |
| instruction is valid. */ |
| invalid = 0; |
| for (opindex = opcode->operands; *opindex != 0; opindex++) |
| { |
| operand = powerpc_operands + *opindex; |
| if (operand->extract) |
| (*operand->extract) (insn, dialect, &invalid); |
| } |
| if (invalid) |
| continue; |
| |
| /* The instruction is valid. */ |
| if (opcode->operands[0] != 0) |
| (*info->fprintf_func) (info->stream, "%-7s ", opcode->name); |
| else |
| (*info->fprintf_func) (info->stream, "%s", opcode->name); |
| |
| /* Now extract and print the operands. */ |
| need_comma = 0; |
| need_paren = 0; |
| for (opindex = opcode->operands; *opindex != 0; opindex++) |
| { |
| long value; |
| |
| operand = powerpc_operands + *opindex; |
| |
| /* Operands that are marked FAKE are simply ignored. We |
| already made sure that the extract function considered |
| the instruction to be valid. */ |
| if ((operand->flags & PPC_OPERAND_FAKE) != 0) |
| continue; |
| |
| /* Extract the value from the instruction. */ |
| if (operand->extract) |
| value = (*operand->extract) (insn, dialect, &invalid); |
| else |
| { |
| value = (insn >> operand->shift) & ((1 << operand->bits) - 1); |
| if ((operand->flags & PPC_OPERAND_SIGNED) != 0 |
| && (value & (1 << (operand->bits - 1))) != 0) |
| value -= 1 << operand->bits; |
| } |
| |
| /* If the operand is optional, and the value is zero, don't |
| print anything. */ |
| if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0 |
| && (operand->flags & PPC_OPERAND_NEXT) == 0 |
| && value == 0) |
| continue; |
| |
| if (need_comma) |
| { |
| (*info->fprintf_func) (info->stream, ","); |
| need_comma = 0; |
| } |
| |
| /* Print the operand as directed by the flags. */ |
| if ((operand->flags & PPC_OPERAND_GPR) != 0 |
| || ((operand->flags & PPC_OPERAND_GPR_0) != 0 && value != 0)) |
| (*info->fprintf_func) (info->stream, "r%ld", value); |
| else if ((operand->flags & PPC_OPERAND_FPR) != 0) |
| (*info->fprintf_func) (info->stream, "f%ld", value); |
| else if ((operand->flags & PPC_OPERAND_VR) != 0) |
| (*info->fprintf_func) (info->stream, "v%ld", value); |
| else if ((operand->flags & PPC_OPERAND_RELATIVE) != 0) |
| (*info->print_address_func) (memaddr + value, info); |
| else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0) |
| (*info->print_address_func) ((bfd_vma) value & 0xffffffff, info); |
| else if ((operand->flags & PPC_OPERAND_CR) == 0 |
| || (dialect & PPC_OPCODE_PPC) == 0) |
| (*info->fprintf_func) (info->stream, "%ld", value); |
| else |
| { |
| if (operand->bits == 3) |
| (*info->fprintf_func) (info->stream, "cr%ld", value); |
| else |
| { |
| static const char *cbnames[4] = { "lt", "gt", "eq", "so" }; |
| int cr; |
| int cc; |
| |
| cr = value >> 2; |
| if (cr != 0) |
| (*info->fprintf_func) (info->stream, "4*cr%d+", cr); |
| cc = value & 3; |
| (*info->fprintf_func) (info->stream, "%s", cbnames[cc]); |
| } |
| } |
| |
| if (need_paren) |
| { |
| (*info->fprintf_func) (info->stream, ")"); |
| need_paren = 0; |
| } |
| |
| if ((operand->flags & PPC_OPERAND_PARENS) == 0) |
| need_comma = 1; |
| else |
| { |
| (*info->fprintf_func) (info->stream, "("); |
| need_paren = 1; |
| } |
| } |
| |
| /* We have found and printed an instruction; return. */ |
| return 4; |
| } |
| |
| if ((dialect & PPC_OPCODE_ANY) != 0) |
| { |
| dialect = ~PPC_OPCODE_ANY; |
| goto again; |
| } |
| |
| /* We could not find a match. */ |
| (*info->fprintf_func) (info->stream, ".long 0x%lx", insn); |
| |
| return 4; |
| } |
| |
| void |
| print_ppc_disassembler_options (FILE *stream) |
| { |
| fprintf (stream, "\n\ |
| The following PPC specific disassembler options are supported for use with\n\ |
| the -M switch:\n"); |
| |
| fprintf (stream, " booke|booke32|booke64 Disassemble the BookE instructions\n"); |
| fprintf (stream, " e300 Disassemble the e300 instructions\n"); |
| fprintf (stream, " e500|e500x2 Disassemble the e500 instructions\n"); |
| fprintf (stream, " efs Disassemble the EFS instructions\n"); |
| fprintf (stream, " power4 Disassemble the Power4 instructions\n"); |
| fprintf (stream, " power5 Disassemble the Power5 instructions\n"); |
| fprintf (stream, " power6 Disassemble the Power6 instructions\n"); |
| fprintf (stream, " 32 Do not disassemble 64-bit instructions\n"); |
| fprintf (stream, " 64 Allow disassembly of 64-bit instructions\n"); |
| } |