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-rw-r--r--disas/arm-a64.cc101
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diff --git a/disas/arm-a64.cc b/disas/arm-a64.cc
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--- a/disas/arm-a64.cc
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-/*
- * ARM A64 disassembly output wrapper to libvixl
- * Copyright (c) 2013 Linaro Limited
- * Written by Claudio Fontana
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "qemu/osdep.h"
-#include "disas/dis-asm.h"
-
-#include "vixl/a64/disasm-a64.h"
-
-using namespace vixl;
-
-static Decoder *vixl_decoder = NULL;
-static Disassembler *vixl_disasm = NULL;
-
-/* We don't use libvixl's PrintDisassembler because its output
- * is a little unhelpful (trailing newlines, for example).
- * Instead we use our own very similar variant so we have
- * control over the format.
- */
-class QEMUDisassembler : public Disassembler {
-public:
- QEMUDisassembler() : printf_(NULL), stream_(NULL) { }
- ~QEMUDisassembler() { }
-
- void SetStream(FILE *stream) {
- stream_ = stream;
- }
-
- void SetPrintf(fprintf_function printf_fn) {
- printf_ = printf_fn;
- }
-
-protected:
- virtual void ProcessOutput(const Instruction *instr) {
- printf_(stream_, "%08" PRIx32 " %s",
- instr->InstructionBits(), GetOutput());
- }
-
-private:
- fprintf_function printf_;
- FILE *stream_;
-};
-
-static int vixl_is_initialized(void)
-{
- return vixl_decoder != NULL;
-}
-
-static void vixl_init() {
- vixl_decoder = new Decoder();
- vixl_disasm = new QEMUDisassembler();
- vixl_decoder->AppendVisitor(vixl_disasm);
-}
-
-#define INSN_SIZE 4
-
-/* Disassemble ARM A64 instruction. This is our only entry
- * point from QEMU's C code.
- */
-int print_insn_arm_a64(uint64_t addr, disassemble_info *info)
-{
- uint8_t bytes[INSN_SIZE];
- uint32_t instrval;
- const Instruction *instr;
- int status;
-
- status = info->read_memory_func(addr, bytes, INSN_SIZE, info);
- if (status != 0) {
- info->memory_error_func(status, addr, info);
- return -1;
- }
-
- if (!vixl_is_initialized()) {
- vixl_init();
- }
-
- ((QEMUDisassembler *)vixl_disasm)->SetPrintf(info->fprintf_func);
- ((QEMUDisassembler *)vixl_disasm)->SetStream(info->stream);
-
- instrval = bytes[0] | bytes[1] << 8 | bytes[2] << 16 | bytes[3] << 24;
- instr = reinterpret_cast<const Instruction *>(&instrval);
- vixl_disasm->MapCodeAddress(addr, instr);
- vixl_decoder->Decode(instr);
-
- return INSN_SIZE;
-}