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Optional W^X policy for JIT pages (#112)

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tevador
2019-08-25 13:47:40 +02:00
committed by GitHub
parent 971f10c9c2
commit 67010ab554
12 changed files with 195 additions and 55 deletions
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src/jit_compiler_x86.cpp
+13 -1
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@@ -218,7 +218,7 @@ namespace randomx {
}
JitCompilerX86::JitCompilerX86() {
code = (uint8_t*)allocExecutableMemory(CodeSize);
code = (uint8_t*)allocMemoryPages(CodeSize);
memcpy(code, codePrologue, prologueSize);
memcpy(code + epilogueOffset, codeEpilogue, epilogueSize);
}
@@ -227,6 +227,18 @@ namespace randomx {
freePagedMemory(code, CodeSize);
}
void JitCompilerX86::enableAll() {
setPagesRWX(code, CodeSize);
}
void JitCompilerX86::enableWriting() {
setPagesRW(code, CodeSize);
}
void JitCompilerX86::enableExecution() {
setPagesRX(code, CodeSize);
}
void JitCompilerX86::generateProgram(Program& prog, ProgramConfiguration& pcfg) {
generateProgramPrologue(prog, pcfg);
memcpy(code + codePos, codeReadDataset, readDatasetSize);