libc

commit f80057393b3fd01070c5b0e14c3c2c85587b869f
parent fc2e8fdcfbdcfff92e72aef056e0491b23ad61bc
Author: evenfri <evenfri256@gmail.com>
Date:   Mon, 10 Aug 2026 03:09:05 +0800

fix start.s

Diffstat:
M
execvp.c
 | 
2
+-
M
start.s
 | 
4
++++

2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/execvp.c b/execvp.c
@@ -5,10 +5,10 @@
 
 #include "libc.h"
 
-static char *empty_env[] = { NULL };
 char **environ;
 
 int execvp(const char *file, char *const argv[]) {
+  static char *empty_env[] = { NULL };
   char **env = (environ != NULL) ? environ : empty_env;
 
   if (strchr(file, '/') != 0) {
diff --git a/start.s b/start.s
@@ -9,6 +9,10 @@ _start:
 
   lea rdx, [rsi + rdi*8 + 8] 
 
+  # save envp to environ
+  lea rax, [rip + environ]
+  mov [rax], rdx
+
   sub rsp, 8
 
   call main