user/libc: execve() supports passing argv now

1 files changed, 17 insertions, 0 deletions

diff --git a/src/user/lib/elfload.s b/src/user/lib/elfload.s
new file mode 100644
index 0000000..faab85f
--- /dev/null
+++ b/src/user/lib/elfload.s
@@ -0,0 +1,17 @@
+.section .text
+.global _freejmp_chstack
+.type _freejmp_chstack, @function
+// void _freejmp_chstack(void *entry, void *low, size_t len, char **argv, char **envp, void *stack);
+_freejmp_chstack:
+	mov %r9, %rsp
+	jmp _freejmp
+
+.section .text
+.global execbuf_chstack
+.type execbuf_chstack, @function
+// _Noreturn void execbuf_chstack(void *stack, void __user *buf, size_t len);
+execbuf_chstack:
+	mov %rdi, %rsp
+	mov $100, %rdi
+	syscall
+	jmp 0 // if execbuf failed we might as well crash