3 files changed, 46 insertions, 0 deletions
diff --git a/lib/libc/internal/init/Kbuild b/lib/libc/internal/init/Kbuild
index dd27261a..7941a53c 100644
--- a/lib/libc/internal/init/Kbuild
+++ b/lib/libc/internal/init/Kbuild
@@ -1 +1,2 @@
+obj-y += init.o
 obj-y += vdso.o
diff --git a/lib/libc/internal/init/init.c b/lib/libc/internal/init/init.c
new file mode 100644
index 00000000..36e66ee4
--- /dev/null
+++ b/lib/libc/internal/init/init.c
@@ -0,0 +1,40 @@
+#include <libc.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <sys/cdefs.h>
+
+extern void __init_vdso(void);
+
+struct libc __libc = { 0 };
+char **environ;
+char *__progname;
+
+extern int main(int, char **, char **);
+
+__used void __init(uintptr_t *rsp)
+{
+	char **argv;
+	size_t *auxv;
+	int argc;
+
+	argc = (int)(*rsp);
+	argv = (char **)(++rsp);
+
+	rsp += argc;
+
+	environ = (char **)(++rsp);
+	__progname = argv[0];
+
+	while (*rsp)
+		rsp++;
+
+	auxv = (size_t *)++rsp;
+
+	for (size_t i = 0; auxv[i]; i += 2)
+		__libc.auxv[auxv[i]] = auxv[i + 1];
+
+	__init_vdso();
+
+	exit(main(argc, argv, environ));
+}
diff --git a/lib/libc/internal/init/vdso.c b/lib/libc/internal/init/vdso.c
index f94401f6..de8d0e2f 100644
--- a/lib/libc/internal/init/vdso.c
+++ b/lib/libc/internal/init/vdso.c
@@ -6,6 +6,11 @@
 void __init_vdso(void)
 {
 	Elf64_Ehdr *ehdr = (Elf64_Ehdr *)getauxval(AT_SYSINFO_EHDR);
+
+	if (ehdr == NULL) {
+		return;
+	}
+
 	Elf64_Phdr *phdr = (Elf64_Phdr *)(ehdr + ehdr->e_phoff);
 
 	for (int i = 0; i < ehdr->e_phnum; i++) {