diff options
| author | Ian Beer <ian.beer@chromium.org> | 2013-11-25 15:31:55 +0400 |
|---|---|---|
| committer | Ian Beer <ian.beer@chromium.org> | 2013-11-25 15:31:55 +0400 |
| commit | 1425e9621234316fe35f84c1668fb94c9ee32a73 (patch) | |
| tree | 46f4498d5cbe664ba44b54ccfe0a6790264dea39 | |
| parent | 1a1bb35291a915c545842cd64b5e12e1e76883fc (diff) | |
remove PROT_WRITE from islands and hooked functions
| -rw-r--r-- | mach_override.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/mach_override.c b/mach_override.c index a2fe80b..4a41efa 100644 --- a/mach_override.c +++ b/mach_override.c @@ -163,7 +163,7 @@ mach_error_t makeIslandExecutable(void *address) { host_page_size( mach_host_self(), &pageSize ); uintptr_t page = (uintptr_t)address & ~(uintptr_t)(pageSize-1); int e = err_none; - e |= mprotect((void *)page, pageSize, PROT_EXEC | PROT_READ | PROT_WRITE); + e |= mprotect((void *)page, pageSize, PROT_EXEC | PROT_READ); e |= msync((void *)page, pageSize, MS_INVALIDATE ); if (e) { err = err_cannot_override; @@ -342,6 +342,11 @@ mach_override_ptr( #endif if ( !err ) atomic_mov64((uint64_t *)originalFunctionPtr, jumpRelativeInstruction); + mach_error_t prot_err = err_none; + prot_err = vm_protect( mach_task_self(), + (vm_address_t) originalFunctionPtr, 8, false, + (VM_PROT_READ | VM_PROT_EXECUTE) ); + if(prot_err) fprintf(stderr, "err = %x %s:%d\n", prot_err, __FILE__, __LINE__); } #endif |