diff options
| -rw-r--r-- | intercept/hook.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/intercept/hook.c b/intercept/hook.c index 610db5e..d6fdb5b 100644 --- a/intercept/hook.c +++ b/intercept/hook.c @@ -131,7 +131,10 @@ bool insert_function_redirect(void *function, void *redirect, uint32_t flags) - (uintptr_t)(sizeof(struct branch)); // Fix permissions on the redirect. - mprotect((void *)((uintptr_t) fixup & PAGE_MASK), PAGE_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC); + if (mprotect((void *)((uintptr_t) fixup & PAGE_MASK), PAGE_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC) != 0) { + printf("mprotect() failed on stub => %m, try `sudo setenforce 0`\n", fixup); + return false; + } // Copy over the code we are going to clobber by installing the redirect. memcpy(&fixup->data, function, redirectsize); |