12b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// copyright notice, this list of conditions and the following disclaimer 22b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// in the documentation and/or other materials provided with the 32b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// distribution. 42b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// * Neither the name of Google Inc. nor the names of its 52b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// contributors may be used to endorse or promote products derived from 62b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// this software without specific prior written permission. 72b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// 82b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 92b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 102b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 112b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 122b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 132b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 142b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 152b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 162b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 172b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 182b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 192b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 202b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// disassembler_x86.cc: simple x86 disassembler. 212b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// 222b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// Provides single step disassembly of x86 bytecode and flags instructions 232b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// that utilize known bad register values. 242b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// 252b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org// Author: Cris Neckar 262b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 272b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org#include "processor/disassembler_x86.h" 282b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 292b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org#include <string.h> 302b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org#include <unistd.h> 312b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 322b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.orgnamespace google_breakpad { 332b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 346162aed3c3fcfc53373c963ac375d39a5dfa5a25ted.mielczarek@gmail.comDisassemblerX86::DisassemblerX86(const uint8_t *bytecode, 356162aed3c3fcfc53373c963ac375d39a5dfa5a25ted.mielczarek@gmail.com uint32_t size, 366162aed3c3fcfc53373c963ac375d39a5dfa5a25ted.mielczarek@gmail.com uint32_t virtual_address) : 372b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org bytecode_(bytecode), 382b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org size_(size), 392b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org virtual_address_(virtual_address), 402b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org current_byte_offset_(0), 412b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org current_inst_offset_(0), 422b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org instr_valid_(false), 432b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org register_valid_(false), 442b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org pushed_bad_value_(false), 452b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org end_of_block_(false), 462b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org flags_(0) { 472b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org libdis::x86_init(libdis::opt_none, NULL, NULL); 482b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org} 492b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 502b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.orgDisassemblerX86::~DisassemblerX86() { 519a51ba04705be56f59e27e510958d6356153fdb9benchan@chromium.org if (instr_valid_) 529a51ba04705be56f59e27e510958d6356153fdb9benchan@chromium.org libdis::x86_oplist_free(¤t_instr_); 539a51ba04705be56f59e27e510958d6356153fdb9benchan@chromium.org 542b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org libdis::x86_cleanup(); 552b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org} 562b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 576162aed3c3fcfc53373c963ac375d39a5dfa5a25ted.mielczarek@gmail.comuint32_t DisassemblerX86::NextInstruction() { 582b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (instr_valid_) 592b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org libdis::x86_oplist_free(¤t_instr_); 602b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 612b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (current_byte_offset_ >= size_) { 622b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org instr_valid_ = false; 632b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org return 0; 642b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org } 656162aed3c3fcfc53373c963ac375d39a5dfa5a25ted.mielczarek@gmail.com uint32_t instr_size = 0; 662b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org instr_size = libdis::x86_disasm((unsigned char *)bytecode_, size_, 672b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org virtual_address_, current_byte_offset_, 682b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org ¤t_instr_); 692b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (instr_size == 0) { 702b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org instr_valid_ = false; 712b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org return 0; 722b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org } 732b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 742b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org current_byte_offset_ += instr_size; 752b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org current_inst_offset_++; 762b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org instr_valid_ = libdis::x86_insn_is_valid(¤t_instr_); 772b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (!instr_valid_) 782b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org return 0; 792b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 802b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (current_instr_.type == libdis::insn_return) 812b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org end_of_block_ = true; 822b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org libdis::x86_op_t *src = libdis::x86_get_src_operand(¤t_instr_); 832b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org libdis::x86_op_t *dest = libdis::x86_get_dest_operand(¤t_instr_); 842b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 852b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (register_valid_) { 862b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org switch (current_instr_.group) { 872b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org // Flag branches based off of bad registers and calls that occur 882b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org // after pushing bad values. 892b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::insn_controlflow: 902b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org switch (current_instr_.type) { 912b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::insn_jmp: 922b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::insn_jcc: 932b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::insn_call: 942b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::insn_callcc: 952b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (dest) { 962b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org switch (dest->type) { 972b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::op_expression: 982b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (dest->data.expression.base.id == bad_register_.id) 992b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org flags_ |= DISX86_BAD_BRANCH_TARGET; 1002b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org break; 1012b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::op_register: 1022b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (dest->data.reg.id == bad_register_.id) 1032b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org flags_ |= DISX86_BAD_BRANCH_TARGET; 1042b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org break; 1052b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org default: 1062b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (pushed_bad_value_ && 1072b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org (current_instr_.type == libdis::insn_call || 1082b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org current_instr_.type == libdis::insn_callcc)) 1092b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org flags_ |= DISX86_BAD_ARGUMENT_PASSED; 1102b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org break; 1112b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org } 1122b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org } 1132b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org break; 114361f24eac7fb452a795709479fc48fd59b04bc1fSiyangXie@gmail.com default: 115361f24eac7fb452a795709479fc48fd59b04bc1fSiyangXie@gmail.com break; 1162b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org } 1172b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org break; 1182b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 1192b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org // Flag block data operations that use bad registers for src or dest. 1202b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::insn_string: 1212b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (dest && dest->type == libdis::op_expression && 1222b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org dest->data.expression.base.id == bad_register_.id) 1232b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org flags_ |= DISX86_BAD_BLOCK_WRITE; 1242b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (src && src->type == libdis::op_expression && 1252b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org src->data.expression.base.id == bad_register_.id) 1262b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org flags_ |= DISX86_BAD_BLOCK_READ; 1272b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org break; 1282b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 1292b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org // Flag comparisons based on bad data. 1302b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::insn_comparison: 1312b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if ((dest && dest->type == libdis::op_expression && 1322b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org dest->data.expression.base.id == bad_register_.id) || 1332b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org (src && src->type == libdis::op_expression && 1342b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org src->data.expression.base.id == bad_register_.id) || 1352b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org (dest && dest->type == libdis::op_register && 1362b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org dest->data.reg.id == bad_register_.id) || 1372b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org (src && src->type == libdis::op_register && 1382b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org src->data.reg.id == bad_register_.id)) 1392b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org flags_ |= DISX86_BAD_COMPARISON; 1402b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org break; 1412b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 1422b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org // Flag any other instruction which derefs a bad register for 1432b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org // src or dest. 1442b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org default: 1452b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (dest && dest->type == libdis::op_expression && 1462b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org dest->data.expression.base.id == bad_register_.id) 1472b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org flags_ |= DISX86_BAD_WRITE; 1482b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (src && src->type == libdis::op_expression && 1492b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org src->data.expression.base.id == bad_register_.id) 1502b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org flags_ |= DISX86_BAD_READ; 1512b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org break; 1522b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org } 1532b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org } 1542b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 1552b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org // When a register is marked as tainted check if it is pushed. 1562b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org // TODO(cdn): may also want to check for MOVs into EBP offsets. 1572b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (register_valid_ && dest && current_instr_.type == libdis::insn_push) { 1582b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org switch (dest->type) { 1592b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::op_expression: 1602b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (dest->data.expression.base.id == bad_register_.id || 1612b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org dest->data.expression.index.id == bad_register_.id) 1622b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org pushed_bad_value_ = true; 1632b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org break; 1642b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::op_register: 1652b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (dest->data.reg.id == bad_register_.id) 1662b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org pushed_bad_value_ = true; 1672b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org break; 168361f24eac7fb452a795709479fc48fd59b04bc1fSiyangXie@gmail.com default: 169361f24eac7fb452a795709479fc48fd59b04bc1fSiyangXie@gmail.com break; 1702b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org } 1712b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org } 1722b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 1732b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org // Check if a tainted register value is clobbered. 1742b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org // For conditional MOVs and XCHGs assume that 1752b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org // there is a hit. 1762b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (register_valid_) { 1772b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org switch (current_instr_.type) { 1782b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::insn_xor: 1792b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (src && src->type == libdis::op_register && 18094074a84d0907f7151b7f274606fcbcf1a248fd5cdn@chromium.org dest && dest->type == libdis::op_register && 1812b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org src->data.reg.id == bad_register_.id && 1822b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org src->data.reg.id == dest->data.reg.id) 1832b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org register_valid_ = false; 1842b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org break; 1852b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::insn_pop: 1862b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::insn_mov: 1872b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::insn_movcc: 1882b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (dest && dest->type == libdis::op_register && 1892b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org dest->data.reg.id == bad_register_.id) 1902b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org register_valid_ = false; 1912b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org break; 1922b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::insn_popregs: 1932b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org register_valid_ = false; 1942b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org break; 1952b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::insn_xchg: 1962b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org case libdis::insn_xchgcc: 1972b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (dest && dest->type == libdis::op_register && 19894074a84d0907f7151b7f274606fcbcf1a248fd5cdn@chromium.org src && src->type == libdis::op_register) { 1992b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (dest->data.reg.id == bad_register_.id) 2002b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org memcpy(&bad_register_, &src->data.reg, sizeof(libdis::x86_reg_t)); 2012b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org else if (src->data.reg.id == bad_register_.id) 2022b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org memcpy(&bad_register_, &dest->data.reg, sizeof(libdis::x86_reg_t)); 2032b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org } 2042b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org break; 205361f24eac7fb452a795709479fc48fd59b04bc1fSiyangXie@gmail.com default: 206361f24eac7fb452a795709479fc48fd59b04bc1fSiyangXie@gmail.com break; 2072b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org } 2082b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org } 2092b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 2102b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org return instr_size; 2112b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org} 2122b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 2132b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.orgbool DisassemblerX86::setBadRead() { 2142b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (!instr_valid_) 2152b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org return false; 2162b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 2172b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org libdis::x86_op_t *operand = libdis::x86_get_src_operand(¤t_instr_); 218fb7fdb9426ac53d17b7ba034264aa4ee4a50b19ecdn@chromium.org if (!operand || operand->type != libdis::op_expression) 2192b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org return false; 2202b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 2212b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org memcpy(&bad_register_, &operand->data.expression.base, 2222b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org sizeof(libdis::x86_reg_t)); 2232b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org register_valid_ = true; 2242b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org return true; 2252b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org} 2262b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 2272b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.orgbool DisassemblerX86::setBadWrite() { 2282b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org if (!instr_valid_) 2292b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org return false; 2302b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 2312b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org libdis::x86_op_t *operand = libdis::x86_get_dest_operand(¤t_instr_); 232fb7fdb9426ac53d17b7ba034264aa4ee4a50b19ecdn@chromium.org if (!operand || operand->type != libdis::op_expression) 2332b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org return false; 2342b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 2352b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org memcpy(&bad_register_, &operand->data.expression.base, 2362b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org sizeof(libdis::x86_reg_t)); 2372b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org register_valid_ = true; 2382b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org return true; 2392b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org} 2402b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org 2412b4274afc4fae883d1251a7a420e24fd526a9f16cdn@chromium.org} // namespace google_breakpad 242