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ret addr patching

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This commit is contained in:
Andrea Fioraldi
2019-09-12 16:57:17 +02:00
parent 95b641198e
commit 75d2881302
5 changed files with 37 additions and 46 deletions
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9
qemu_mode/patches/afl-qemu-cpu-inl.h
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@ -86,6 +86,7 @@ static int forkserver_installed = 0;
unsigned char afl_fork_child;
unsigned int afl_forksrv_pid;
unsigned char is_persistent;
target_long persistent_stack_offset;
/* Instrumentation ratio: */
@ -200,9 +201,10 @@ static void afl_setup(void) {
if (is_persistent) {
afl_persistent_addr = strtoll(getenv("AFL_QEMU_PERSISTENT_ADDR"), NULL, 16);
if (getenv("AFL_QEMU_PERSISTENT_RET") == NULL) exit(1);
afl_persistent_ret_addr =
strtoll(getenv("AFL_QEMU_PERSISTENT_RET"), NULL, 16);
if (getenv("AFL_QEMU_PERSISTENT_RET"))
afl_persistent_ret_addr =
strtoll(getenv("AFL_QEMU_PERSISTENT_RET"), NULL, 16);
/* If AFL_QEMU_PERSISTENT_RET is not specified patch the return addr */
}
@ -345,6 +347,7 @@ void afl_persistent_loop() {
cycle_cnt = afl_persistent_cnt;
first_pass = 0;
persistent_stack_offset = TARGET_LONG_BITS / 8;
return;