Jordan Delong
363d1bb20f
This change is mostly for FB internal organizational reasons. Building is not effected beyond the fact that the target now lands in hphp/hhvm/hhvm rather than src/hhvm/hhvm.
99 linhas
3.2 KiB
C++
99 linhas
3.2 KiB
C++
/*
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+----------------------------------------------------------------------+
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| HipHop for PHP |
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+----------------------------------------------------------------------+
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| Copyright (c) 2010- Facebook, Inc. (http://www.facebook.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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*/
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#include <iomanip>
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#include <stdlib.h>
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#include "folly/Format.h"
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#include "util/disasm.h"
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#include "util/base.h"
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namespace HPHP {
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Disasm::Disasm(int indentLevel /* = 0 */, bool printEncoding /* = false */)
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: m_indent(indentLevel)
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, m_printEncoding(printEncoding)
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{
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#ifdef HAVE_LIBXED
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xed_state_init(&m_xedState, XED_MACHINE_MODE_LONG_64,
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XED_ADDRESS_WIDTH_64b, XED_ADDRESS_WIDTH_64b);
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xed_tables_init();
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#endif // HAVE_LIBXED
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}
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#ifdef HAVE_LIBXED
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static void error(std::string msg) {
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fprintf(stderr, "Error: %s\n", msg.c_str());
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exit(1);
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}
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#define MAX_INSTR_ASM_LEN 128
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static const xed_syntax_enum_t s_xed_syntax =
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getenv("HHVM_ATT_DISAS") ? XED_SYNTAX_ATT : XED_SYNTAX_INTEL;
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#endif // HAVE_LIBXED
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void Disasm::disasm(std::ostream& out, uint8_t* codeStartAddr,
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uint8_t* codeEndAddr) {
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#ifdef HAVE_LIBXED
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char codeStr[MAX_INSTR_ASM_LEN];
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xed_uint8_t *frontier;
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xed_decoded_inst_t xedd;
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uint64 ip;
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// Decode and print each instruction
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for (frontier = codeStartAddr, ip = (uint64)codeStartAddr;
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frontier < codeEndAddr; ) {
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xed_decoded_inst_zero_set_mode(&xedd, &m_xedState);
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xed_decoded_inst_set_input_chip(&xedd, XED_CHIP_INVALID);
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xed_error_enum_t xed_error = xed_decode(&xedd, frontier, 15);
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if (xed_error != XED_ERROR_NONE) error("disasm error: xed_decode failed");
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// Get disassembled instruction in codeStr
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if (!xed_format_context(s_xed_syntax, &xedd, codeStr,
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MAX_INSTR_ASM_LEN, ip, NULL)) {
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error("disasm error: xed_format_context failed");
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}
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for (int i = 0; i < m_indent; ++i) {
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out << ' ';
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}
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out << folly::format("{:#10x}: ", ip);
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uint32 instrLen = xed_decoded_inst_get_length(&xedd);
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if (m_printEncoding) {
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// print encoding, like in objdump
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unsigned posi = 0;
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for (; posi < instrLen; ++posi) {
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out << folly::format("{:02x} ", (uint8_t)frontier[posi]);
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}
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for (; posi < 16; ++posi) {
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out << " ";
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}
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}
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out << codeStr << std::endl;
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frontier += instrLen;
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ip += instrLen;
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}
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#else
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out << "This binary was compiled without disassembly support\n";
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#endif // HAVE_LIBXED
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}
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} // namespace HPHP
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