| 1 | /* tilepro-dis.c. Disassembly routines for the TILEPro architecture. |
| 2 | Copyright 2011 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of the GNU opcodes library. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 19 | MA 02110-1301, USA. */ |
| 20 | |
| 21 | #include <stddef.h> |
| 22 | #include <assert.h> |
| 23 | #include "bfd.h" |
| 24 | #include "elf/tilepro.h" |
| 25 | #include "elf-bfd.h" |
| 26 | #include "sysdep.h" |
| 27 | #include "dis-asm.h" |
| 28 | #include "opcode/tilepro.h" |
| 29 | |
| 30 | |
| 31 | #define TREG_ZERO 63 |
| 32 | |
| 33 | static int |
| 34 | contains_insn (tilepro_mnemonic expected_mnemonic, |
| 35 | int expected_first_operand, |
| 36 | int expected_second_operand, |
| 37 | bfd_vma memaddr, |
| 38 | int *last_operand_ret, |
| 39 | disassemble_info *info) |
| 40 | { |
| 41 | struct tilepro_decoded_instruction |
| 42 | decoded[TILEPRO_MAX_INSTRUCTIONS_PER_BUNDLE]; |
| 43 | bfd_byte opbuf[TILEPRO_BUNDLE_SIZE_IN_BYTES]; |
| 44 | int i, num_instructions; |
| 45 | |
| 46 | if ((*info->read_memory_func) (memaddr, opbuf, |
| 47 | TILEPRO_BUNDLE_SIZE_IN_BYTES, info) != 0) |
| 48 | /* If we cannot even read the memory, it obviously does not have the |
| 49 | instruction for which we are looking. */ |
| 50 | return 0; |
| 51 | |
| 52 | /* Parse the instructions in the bundle. */ |
| 53 | num_instructions = parse_insn_tilepro (bfd_getl64 (opbuf), memaddr, decoded); |
| 54 | |
| 55 | for (i = 0; i < num_instructions; i++) |
| 56 | { |
| 57 | const struct tilepro_opcode *opcode = decoded[i].opcode; |
| 58 | |
| 59 | if (opcode->mnemonic != expected_mnemonic) |
| 60 | continue; |
| 61 | |
| 62 | if (expected_first_operand != -1 |
| 63 | && decoded[i].operand_values[0] != expected_first_operand) |
| 64 | continue; |
| 65 | |
| 66 | if (expected_second_operand != -1 |
| 67 | && decoded[i].operand_values[1] != expected_second_operand) |
| 68 | continue; |
| 69 | |
| 70 | *last_operand_ret = decoded[i].operand_values[opcode->num_operands - 1]; |
| 71 | return 1; |
| 72 | } |
| 73 | |
| 74 | /* No match. */ |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | |
| 79 | int |
| 80 | print_insn_tilepro (bfd_vma memaddr, disassemble_info *info) |
| 81 | { |
| 82 | struct tilepro_decoded_instruction |
| 83 | decoded[TILEPRO_MAX_INSTRUCTIONS_PER_BUNDLE]; |
| 84 | bfd_byte opbuf[TILEPRO_BUNDLE_SIZE_IN_BYTES]; |
| 85 | int status, i, num_instructions, num_printed; |
| 86 | tilepro_mnemonic padding_mnemonic; |
| 87 | |
| 88 | status = (*info->read_memory_func) (memaddr, opbuf, |
| 89 | TILEPRO_BUNDLE_SIZE_IN_BYTES, info); |
| 90 | if (status != 0) |
| 91 | { |
| 92 | (*info->memory_error_func) (status, memaddr, info); |
| 93 | return -1; |
| 94 | } |
| 95 | |
| 96 | info->bytes_per_line = TILEPRO_BUNDLE_SIZE_IN_BYTES; |
| 97 | info->bytes_per_chunk = TILEPRO_BUNDLE_SIZE_IN_BYTES; |
| 98 | info->octets_per_byte = 1; |
| 99 | info->display_endian = BFD_ENDIAN_LITTLE; |
| 100 | |
| 101 | /* Parse the instructions in the bundle. */ |
| 102 | num_instructions = parse_insn_tilepro (bfd_getl64 (opbuf), memaddr, decoded); |
| 103 | |
| 104 | /* Print the instructions in the bundle. */ |
| 105 | info->fprintf_func (info->stream, "{ "); |
| 106 | num_printed = 0; |
| 107 | |
| 108 | /* Determine which nop opcode is used for padding and should be skipped. */ |
| 109 | padding_mnemonic = TILEPRO_OPC_FNOP; |
| 110 | for (i = 0; i < num_instructions; i++) |
| 111 | { |
| 112 | if (!decoded[i].opcode->can_bundle) |
| 113 | { |
| 114 | /* Instructions that cannot be bundled are padded out with nops, |
| 115 | rather than fnops. Displaying them is always clutter. */ |
| 116 | padding_mnemonic = TILEPRO_OPC_NOP; |
| 117 | break; |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | for (i = 0; i < num_instructions; i++) |
| 122 | { |
| 123 | const struct tilepro_opcode *opcode = decoded[i].opcode; |
| 124 | const char *name; |
| 125 | int j; |
| 126 | |
| 127 | /* Do not print out fnops, unless everything is an fnop, in |
| 128 | which case we will print out just the last one. */ |
| 129 | if (opcode->mnemonic == padding_mnemonic |
| 130 | && (num_printed > 0 || i + 1 < num_instructions)) |
| 131 | continue; |
| 132 | |
| 133 | if (num_printed > 0) |
| 134 | info->fprintf_func (info->stream, " ; "); |
| 135 | ++num_printed; |
| 136 | |
| 137 | name = opcode->name; |
| 138 | if (name == NULL) |
| 139 | name = "<invalid>"; |
| 140 | info->fprintf_func (info->stream, "%s", name); |
| 141 | |
| 142 | for (j = 0; j < opcode->num_operands; j++) |
| 143 | { |
| 144 | int num; |
| 145 | const struct tilepro_operand *op; |
| 146 | const char *spr_name; |
| 147 | |
| 148 | if (j > 0) |
| 149 | info->fprintf_func (info->stream, ","); |
| 150 | info->fprintf_func (info->stream, " "); |
| 151 | |
| 152 | num = decoded[i].operand_values[j]; |
| 153 | |
| 154 | op = decoded[i].operands[j]; |
| 155 | switch (op->type) |
| 156 | { |
| 157 | case TILEPRO_OP_TYPE_REGISTER: |
| 158 | info->fprintf_func (info->stream, "%s", |
| 159 | tilepro_register_names[num]); |
| 160 | break; |
| 161 | |
| 162 | case TILEPRO_OP_TYPE_SPR: |
| 163 | spr_name = get_tilepro_spr_name(num); |
| 164 | if (spr_name != NULL) |
| 165 | info->fprintf_func (info->stream, "%s", spr_name); |
| 166 | else |
| 167 | info->fprintf_func (info->stream, "%d", num); |
| 168 | break; |
| 169 | |
| 170 | case TILEPRO_OP_TYPE_IMMEDIATE: |
| 171 | { |
| 172 | bfd_vma addr = 0; |
| 173 | int found_addr = 0; |
| 174 | int addr_piece; |
| 175 | |
| 176 | switch (opcode->mnemonic) |
| 177 | { |
| 178 | case TILEPRO_OPC_ADDLI: |
| 179 | if (contains_insn (TILEPRO_OPC_AULI, |
| 180 | decoded[i].operand_values[1], |
| 181 | TREG_ZERO, |
| 182 | memaddr - TILEPRO_BUNDLE_SIZE_IN_BYTES, |
| 183 | &addr_piece, |
| 184 | info)) |
| 185 | { |
| 186 | addr = num + (addr_piece << 16); |
| 187 | found_addr = 1; |
| 188 | } |
| 189 | break; |
| 190 | |
| 191 | case TILEPRO_OPC_AULI: |
| 192 | if (contains_insn (TILEPRO_OPC_MOVELI, |
| 193 | decoded[i].operand_values[1], |
| 194 | -1, |
| 195 | memaddr - TILEPRO_BUNDLE_SIZE_IN_BYTES, |
| 196 | &addr_piece, |
| 197 | info)) |
| 198 | { |
| 199 | addr = (num << 16) + addr_piece; |
| 200 | found_addr = 1; |
| 201 | } |
| 202 | break; |
| 203 | |
| 204 | default: |
| 205 | /* Operand does not look like a constructed address. */ |
| 206 | break; |
| 207 | } |
| 208 | |
| 209 | info->fprintf_func (info->stream, "%d", num); |
| 210 | |
| 211 | if (found_addr) |
| 212 | { |
| 213 | info->fprintf_func (info->stream, " /* "); |
| 214 | info->print_address_func (addr, info); |
| 215 | info->fprintf_func (info->stream, " */"); |
| 216 | } |
| 217 | } |
| 218 | break; |
| 219 | |
| 220 | case TILEPRO_OP_TYPE_ADDRESS: |
| 221 | info->print_address_func ((bfd_vma)(unsigned int) num, info); |
| 222 | break; |
| 223 | |
| 224 | default: |
| 225 | abort (); |
| 226 | } |
| 227 | } |
| 228 | } |
| 229 | info->fprintf_func (info->stream, " }"); |
| 230 | |
| 231 | return TILEPRO_BUNDLE_SIZE_IN_BYTES; |
| 232 | } |