2 * ARM A64 disassembly output wrapper to libvixl
3 * Copyright (c) 2013 Linaro Limited
4 * Written by Claudio Fontana
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 2 of the License, or
9 * (at your option) any later version.
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.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include "qemu/osdep.h"
22 #include "disas/bfd.h"
25 #include "vixl/a64/disasm-a64.h"
29 static Decoder
*vixl_decoder
= NULL
;
30 static Disassembler
*vixl_disasm
= NULL
;
32 /* We don't use libvixl's PrintDisassembler because its output
33 * is a little unhelpful (trailing newlines, for example).
34 * Instead we use our own very similar variant so we have
35 * control over the format.
37 class QEMUDisassembler
: public Disassembler
{
39 QEMUDisassembler() : printf_(NULL
), stream_(NULL
) { }
40 ~QEMUDisassembler() { }
42 void SetStream(FILE *stream
) {
46 void SetPrintf(fprintf_function printf_fn
) {
51 virtual void ProcessOutput(const Instruction
*instr
) {
52 printf_(stream_
, "%08" PRIx32
" %s",
53 instr
->InstructionBits(), GetOutput());
57 fprintf_function printf_
;
61 static int vixl_is_initialized(void)
63 return vixl_decoder
!= NULL
;
66 static void vixl_init() {
67 vixl_decoder
= new Decoder();
68 vixl_disasm
= new QEMUDisassembler();
69 vixl_decoder
->AppendVisitor(vixl_disasm
);
74 /* Disassemble ARM A64 instruction. This is our only entry
75 * point from QEMU's C code.
77 int print_insn_arm_a64(uint64_t addr
, disassemble_info
*info
)
79 uint8_t bytes
[INSN_SIZE
];
81 const Instruction
*instr
;
84 status
= info
->read_memory_func(addr
, bytes
, INSN_SIZE
, info
);
86 info
->memory_error_func(status
, addr
, info
);
90 if (!vixl_is_initialized()) {
94 ((QEMUDisassembler
*)vixl_disasm
)->SetPrintf(info
->fprintf_func
);
95 ((QEMUDisassembler
*)vixl_disasm
)->SetStream(info
->stream
);
97 instrval
= bytes
[0] | bytes
[1] << 8 | bytes
[2] << 16 | bytes
[3] << 24;
98 instr
= reinterpret_cast<const Instruction
*>(&instrval
);
99 vixl_disasm
->MapCodeAddress(addr
, instr
);
100 vixl_decoder
->Decode(instr
);