user/ports: bare minimum to run doomgeneric

1 files changed, 15 insertions, 1 deletions

diff --git a/src/user/lib/stdlib.c b/src/user/lib/stdlib.c
index 6018d16..38e87ad 100644
--- a/src/user/lib/stdlib.c
+++ b/src/user/lib/stdlib.c
@@ -1,7 +1,8 @@
-#include <camellia/syscalls.h>
 #include <camellia/flags.h>
+#include <camellia/syscalls.h>
 #include <errno.h>
 #include <string.h>
+#include <user/lib/panic.h>
 
 _Noreturn void abort(void) {
 	_syscall_exit(1);
@@ -30,3 +31,16 @@ int system(const char *cmd) {
 	errno = ENOSYS;
 	return -1;
 }
+
+int abs(int i) {
+	return i < 0 ? -i : i;
+}
+
+int atoi(const char *s) {
+	return strtol(s, NULL, 10);
+}
+
+double atof(const char *s) {
+	(void)s;
+	__libc_panic("unimplemented");
+}