Max Filippov | 5a6539e | 2017-10-31 16:17:43 -0700 | [diff] [blame] | 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" |
Markus Armbruster | 3979fca | 2019-04-17 21:18:04 +0200 | [diff] [blame] | 29 | #include "disas/dis-asm.h" |
Max Filippov | 5a6539e | 2017-10-31 16:17:43 -0700 | [diff] [blame] | 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; |
Max Filippov | 847a647 | 2018-01-18 10:08:49 -0800 | [diff] [blame] | 40 | int slot, slots; |
Max Filippov | 5a6539e | 2017-10-31 16:17:43 -0700 | [diff] [blame] | 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; |
Max Filippov | 847a647 | 2018-01-18 10:08:49 -0800 | [diff] [blame] | 82 | int opnd, vopnd, opnds; |
Max Filippov | 5a6539e | 2017-10-31 16:17:43 -0700 | [diff] [blame] | 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 | } |