Kernel+LibC: Implement sigaltstack()

This is required for compiling wine for serenity

2 files changed, 7 insertions, 0 deletions

diff --git a/Userland/Libraries/LibC/signal.cpp b/Userland/Libraries/LibC/signal.cpp
index c6f213268c..3f43db5496 100644
--- a/Userland/Libraries/LibC/signal.cpp
+++ b/Userland/Libraries/LibC/signal.cpp
@@ -75,6 +75,12 @@ int sigaddset(sigset_t* set, int sig)
     return 0;
 }
 
+int sigaltstack(const stack_t* ss, stack_t* old_ss)
+{
+    int rc = syscall(SC_sigaltstack, ss, old_ss);
+    __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+
 int sigdelset(sigset_t* set, int sig)
 {
     if (sig < 1 || sig > 32) {
diff --git a/Userland/Libraries/LibC/signal.h b/Userland/Libraries/LibC/signal.h
index 5284d8bc68..e11bf80b8d 100644
--- a/Userland/Libraries/LibC/signal.h
+++ b/Userland/Libraries/LibC/signal.h
@@ -21,6 +21,7 @@ int sigaction(int sig, const struct sigaction* act, struct sigaction* old_act);
 int sigemptyset(sigset_t*);
 int sigfillset(sigset_t*);
 int sigaddset(sigset_t*, int sig);
+int sigaltstack(const stack_t* ss, stack_t* old_ss);
 int sigdelset(sigset_t*, int sig);
 int sigismember(const sigset_t*, int sig);
 int sigprocmask(int how, const sigset_t* set, sigset_t* old_set);