diff options
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index e94f1eed5c..0ebe7e1c26 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -5400,6 +5400,17 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, ret = get_errno(target_munmap(arg1, arg2)); break; case TARGET_NR_mprotect: + { + TaskState *ts = ((CPUState *)cpu_env)->opaque; + /* Special hack to detect libc making the stack executable. */ + if ((arg3 & PROT_GROWSDOWN) + && arg1 >= ts->info->stack_limit + && arg1 <= ts->info->start_stack) { + arg3 &= ~PROT_GROWSDOWN; + arg2 = arg2 + arg1 - ts->info->stack_limit; + arg1 = ts->info->stack_limit; + } + } ret = get_errno(target_mprotect(arg1, arg2, arg3)); break; #ifdef TARGET_NR_mremap |