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https://github.com/xemu-project/xemu.git
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5de6f3c0f4
Update our copy of libvixl to upstream's 1.12 release. The major benefit from QEMU's point of view is that some instructions previously disassembled as "unimplemented (System)" are now displayed as something more useful. It also fixes some warnings about format strings that newer w64-mingw32 compilers were emitting. We didn't have any local changes to libvixl so nothing needed to be forward-ported. Although this is a large commit (due to upstream renaming most of the files), only a few of the files changed in this commit are not just straight copies of upstream libvixl files: disas/arm-a64.cc disas/libvixl/Makefile.objs disas/libvixl/README Note that this commit introduces some signed-unsigned comparison warnings on the old mingw compilers. Those compilers have broken TLS support anyway so have only ever been much use for compile tests; anybody still using them should add -Wno-sign-compare to their --extra-cflags. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
103 lines
2.7 KiB
C++
103 lines
2.7 KiB
C++
/*
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* ARM A64 disassembly output wrapper to libvixl
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* Copyright (c) 2013 Linaro Limited
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* Written by Claudio Fontana
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "vixl/a64/disasm-a64.h"
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extern "C" {
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#include "disas/bfd.h"
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}
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using namespace vixl;
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static Decoder *vixl_decoder = NULL;
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static Disassembler *vixl_disasm = NULL;
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/* We don't use libvixl's PrintDisassembler because its output
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* is a little unhelpful (trailing newlines, for example).
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* Instead we use our own very similar variant so we have
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* control over the format.
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*/
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class QEMUDisassembler : public Disassembler {
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public:
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QEMUDisassembler() : printf_(NULL), stream_(NULL) { }
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~QEMUDisassembler() { }
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void SetStream(FILE *stream) {
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stream_ = stream;
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}
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void SetPrintf(fprintf_function printf_fn) {
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printf_ = printf_fn;
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}
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protected:
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virtual void ProcessOutput(const Instruction *instr) {
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printf_(stream_, "%08" PRIx32 " %s",
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instr->InstructionBits(), GetOutput());
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}
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private:
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fprintf_function printf_;
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FILE *stream_;
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};
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static int vixl_is_initialized(void)
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{
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return vixl_decoder != NULL;
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}
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static void vixl_init() {
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vixl_decoder = new Decoder();
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vixl_disasm = new QEMUDisassembler();
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vixl_decoder->AppendVisitor(vixl_disasm);
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}
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#define INSN_SIZE 4
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/* Disassemble ARM A64 instruction. This is our only entry
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* point from QEMU's C code.
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*/
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int print_insn_arm_a64(uint64_t addr, disassemble_info *info)
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{
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uint8_t bytes[INSN_SIZE];
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uint32_t instrval;
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const Instruction *instr;
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int status;
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status = info->read_memory_func(addr, bytes, INSN_SIZE, info);
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if (status != 0) {
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info->memory_error_func(status, addr, info);
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return -1;
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}
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if (!vixl_is_initialized()) {
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vixl_init();
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}
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((QEMUDisassembler *)vixl_disasm)->SetPrintf(info->fprintf_func);
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((QEMUDisassembler *)vixl_disasm)->SetStream(info->stream);
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instrval = bytes[0] | bytes[1] << 8 | bytes[2] << 16 | bytes[3] << 24;
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instr = reinterpret_cast<const Instruction *>(&instrval);
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vixl_disasm->MapCodeAddress(addr, instr);
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vixl_decoder->Decode(instr);
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return INSN_SIZE;
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}
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