From 1a87c1eae23a987dbc5a99af80bf28a4e152476d Mon Sep 17 00:00:00 2001
From: Yann MAGNIN <yann.magnin@protonmail.com>
Date: Sun, 12 May 2024 12:47:31 +0200
Subject: [PATCH] exposes `_exit()` as an alias to `_Exit()` to support the
 libSSP with GGC 14.1

---
 CMakeLists.txt     | 2 ++
 include/unistd.h   | 4 ++++
 src/unistd/_exit.c | 4 ++++
 3 files changed, 10 insertions(+)
 create mode 100644 src/unistd/_exit.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7852235..06c9b7b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -190,6 +190,8 @@ set(SOURCES
   src/stdlib/strtoll.c
   src/stdlib/strtoul.c
   src/stdlib/strtoull.c
+  # unistd
+  src/unistd/_exit.c
   # string
   src/string/memchr.c
   src/string/memcmp.c
diff --git a/include/unistd.h b/include/unistd.h
index faf2394..886fa4f 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -45,6 +45,10 @@ extern char *getcwd(char *__buf, size_t __size);
 
 extern int chdir(char const *__path);
 
+/* Exit immediately, bypassing exit handlers or signal handlers. */
+__attribute__((noreturn))
+extern void _exit(int __status);
+
 
 /* Kernel-style functions supported only by Vhex. */
 
diff --git a/src/unistd/_exit.c b/src/unistd/_exit.c
new file mode 100644
index 0000000..c7199fa
--- /dev/null
+++ b/src/unistd/_exit.c
@@ -0,0 +1,4 @@
+#include <unistd.h>
+
+/* Exit immediately, bypassing exit handlers or signal handlers. */
+void _exit(int status) __attribute__((alias("_Exit")));