diff options
Diffstat (limited to 'linux-user')
| -rw-r--r-- | linux-user/syscall.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index d9f4695..dea827f 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -703,6 +703,7 @@ safe_syscall4(pid_t, wait4, pid_t, pid, int *, status, int, options, \ struct rusage *, rusage) safe_syscall5(int, waitid, idtype_t, idtype, id_t, id, siginfo_t *, infop, \ int, options, struct rusage *, rusage) +safe_syscall3(int, execve, const char *, filename, char **, argv, char **, envp) static inline int host_to_target_sock_type(int host_type) { @@ -6179,7 +6180,17 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, if (!(p = lock_user_string(arg1))) goto execve_efault; - ret = get_errno(execve(p, argp, envp)); + /* Although execve() is not an interruptible syscall it is + * a special case where we must use the safe_syscall wrapper: + * if we allow a signal to happen before we make the host + * syscall then we will 'lose' it, because at the point of + * execve the process leaves QEMU's control. So we use the + * safe syscall wrapper to ensure that we either take the + * signal as a guest signal, or else it does not happen + * before the execve completes and makes it the other + * program's problem. + */ + ret = get_errno(safe_execve(p, argp, envp)); unlock_user(p, arg1, 0); goto execve_end; |