1 /* 2 * Copyright (c) 2017, Max Filippov, Open Source and Linux Lab. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * * Neither the name of the Open Source and Linux Lab nor the 13 * names of its contributors may be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "qemu/osdep.h" 29 #include "disas/bfd.h" 30 #include "hw/xtensa/xtensa-isa.h" 31 32 int print_insn_xtensa(bfd_vma memaddr, struct disassemble_info *info) 33 { 34 xtensa_isa isa = info->private_data; 35 xtensa_insnbuf insnbuf = xtensa_insnbuf_alloc(isa); 36 xtensa_insnbuf slotbuf = xtensa_insnbuf_alloc(isa); 37 bfd_byte *buffer = g_malloc(1); 38 int status = info->read_memory_func(memaddr, buffer, 1, info); 39 xtensa_format fmt; 40 int slot, slots; 41 unsigned len; 42 43 if (status) { 44 info->memory_error_func(status, memaddr, info); 45 len = -1; 46 goto out; 47 } 48 len = xtensa_isa_length_from_chars(isa, buffer); 49 if (len == XTENSA_UNDEFINED) { 50 info->fprintf_func(info->stream, ".byte 0x%02x", buffer[0]); 51 len = 1; 52 goto out; 53 } 54 buffer = g_realloc(buffer, len); 55 status = info->read_memory_func(memaddr + 1, buffer + 1, len - 1, info); 56 if (status) { 57 info->fprintf_func(info->stream, ".byte 0x%02x", buffer[0]); 58 info->memory_error_func(status, memaddr + 1, info); 59 len = 1; 60 goto out; 61 } 62 63 xtensa_insnbuf_from_chars(isa, insnbuf, buffer, len); 64 fmt = xtensa_format_decode(isa, insnbuf); 65 if (fmt == XTENSA_UNDEFINED) { 66 unsigned i; 67 68 for (i = 0; i < len; ++i) { 69 info->fprintf_func(info->stream, "%s 0x%02x", 70 i ? ", " : ".byte ", buffer[i]); 71 } 72 goto out; 73 } 74 slots = xtensa_format_num_slots(isa, fmt); 75 76 if (slots > 1) { 77 info->fprintf_func(info->stream, "{ "); 78 } 79 80 for (slot = 0; slot < slots; ++slot) { 81 xtensa_opcode opc; 82 int opnd, vopnd, opnds; 83 84 if (slot) { 85 info->fprintf_func(info->stream, "; "); 86 } 87 xtensa_format_get_slot(isa, fmt, slot, insnbuf, slotbuf); 88 opc = xtensa_opcode_decode(isa, fmt, slot, slotbuf); 89 if (opc == XTENSA_UNDEFINED) { 90 info->fprintf_func(info->stream, "???"); 91 continue; 92 } 93 opnds = xtensa_opcode_num_operands(isa, opc); 94 95 info->fprintf_func(info->stream, "%s", xtensa_opcode_name(isa, opc)); 96 97 for (opnd = vopnd = 0; opnd < opnds; ++opnd) { 98 if (xtensa_operand_is_visible(isa, opc, opnd)) { 99 uint32_t v = 0xbadc0de; 100 int rc; 101 102 info->fprintf_func(info->stream, vopnd ? ", " : "\t"); 103 xtensa_operand_get_field(isa, opc, opnd, fmt, slot, 104 slotbuf, &v); 105 rc = xtensa_operand_decode(isa, opc, opnd, &v); 106 if (rc == XTENSA_UNDEFINED) { 107 info->fprintf_func(info->stream, "???"); 108 } else if (xtensa_operand_is_register(isa, opc, opnd)) { 109 xtensa_regfile rf = xtensa_operand_regfile(isa, opc, opnd); 110 111 info->fprintf_func(info->stream, "%s%d", 112 xtensa_regfile_shortname(isa, rf), v); 113 } else if (xtensa_operand_is_PCrelative(isa, opc, opnd)) { 114 xtensa_operand_undo_reloc(isa, opc, opnd, &v, memaddr); 115 info->fprintf_func(info->stream, "0x%x", v); 116 } else { 117 info->fprintf_func(info->stream, "%d", v); 118 } 119 ++vopnd; 120 } 121 } 122 } 123 if (slots > 1) { 124 info->fprintf_func(info->stream, " }"); 125 } 126 127 out: 128 g_free(buffer); 129 xtensa_insnbuf_free(isa, insnbuf); 130 xtensa_insnbuf_free(isa, slotbuf); 131 132 return len; 133 } 134