本文整理汇总了C++中codeGen::moveIndex方法的典型用法代码示例。如果您正苦于以下问题：C++ codeGen::moveIndex方法的具体用法？C++ codeGen::moveIndex怎么用？C++ codeGen::moveIndex使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类codeGen的用法示例。
在下文中一共展示了codeGen::moveIndex方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: generate
void insnCodeGen::generate(codeGen &gen,instruction & insn) {
assert(insn.ptr());
assert(insn.size());
memcpy(gen.cur_ptr(), insn.ptr(), insn.size());
gen.moveIndex(insn.size());
}示例2: modifyJcc
bool insnCodeGen::modifyJcc(Address targetAddr, NS_x86::instruction &insn, codeGen &gen) {
const unsigned char *origInsn = insn.ptr();
unsigned insnType = insn.type();
Address from = gen.currAddr();
Address potential;
signed long disp;
codeBufIndex_t start = gen.getIndex();
GET_PTR(newInsn, gen);
from += copy_prefixes_nosize_or_segments(origInsn, newInsn, insnType);
//8-bit jump
potential = from + 2;
disp = targetAddr - potential;
if (is_disp8(disp)) {
convert_to_rel8(origInsn, newInsn);
*newInsn++ = (signed char) disp;
SET_PTR(newInsn, gen);
return true;
}
//Can't convert short E0-E3 loops/jumps to 32-bit equivalents
if (*origInsn < 0xE0 || *origInsn > 0xE3) {
/*
//16-bit jump
potential = from + 5;
disp = targetAddr - potential;
if (is_disp16(disp) && gen.fromSpace()->getAddressWidth() != 8) {
*newInsn++ = 0x66; //Prefix to shift 32-bit to 16-bit
convert_to_rel32(origInsn, newInsn);
*((signed short *) newInsn) = (signed short) disp;
newInsn += 2;
SET_PTR(newInsn, gen);
return true;
}
*/
//32-bit jump
potential = from + 6;
disp = targetAddr - potential;
if (is_disp32(disp)) {
convert_to_rel32(origInsn, newInsn);
*((signed int *) newInsn) = (signed int) disp;
newInsn += 4;
SET_PTR(newInsn, gen);
return true;
}
}
// We use a three-step branch system that looks like so:
// jump conditional <A>
// becomes
// jump conditional <B>
// jump <C>
// B: jump <A>
// C: ... next insn
// Moves as appropriate...
convert_to_rel8(origInsn, newInsn);
// We now want a 2-byte branch past the branch at B
*newInsn++ = 2;
// Now for the branch to C - <jumpSize> unconditional branch
*newInsn++ = 0xEB;
SET_PTR(newInsn, gen);
// We now want to 1) move forward a byte (the offset we haven't filled
// in yet) and track that we want to fill it in once we're done.
codeBufIndex_t jump_to_c_offset_index = gen.getIndex();
gen.moveIndex(1);
codeBufIndex_t jump_from_index = gen.getIndex();
// Original address is a little skewed...
// We've moved past the original address (to the tune of nPrefixes + 2 (JCC) + 2 (J))
Address currAddr = from + (unsigned) gen.getIndex() - start;
insnCodeGen::generateBranch(gen, currAddr, targetAddr);
codeBufIndex_t done = gen.getIndex();
// Go back and generate the branch _around_ the offset we just calculated
gen.setIndex(jump_to_c_offset_index);
REGET_PTR(newInsn, gen);
//Go back and fill in the size of the jump at B into the 'jump <C>'
// The -1 is because
*newInsn = gen.getDisplacement(jump_from_index, done);
SET_PTR(newInsn, gen);
gen.setIndex(done);
return true;
}