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/dis-asm.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 | |