Syscalls return a value, right?

2022-10-02 10:47:59 +02:00 · 2022-10-02 10:47:59 +02:00 · dc0fd428d3
commit dc0fd428d3
parent 85d4268b01
2 changed files with 5 additions and 3 deletions
--- a/libs/libc/include/luna/syscall.h
+++ b/libs/libc/include/luna/syscall.h
@ -8,7 +8,7 @@ extern "C"
 {
 #endif

-    void __syscall0(int sys_num);
+    long int __syscall0(int sys_num);

 #ifdef __cplusplus
 }
--- a/libs/libc/src/luna/syscall.cpp
+++ b/libs/libc/src/luna/syscall.cpp
@ -3,8 +3,10 @@

 extern "C"
 {
-    void __syscall0(int sys_num)
+    long int __syscall0(int sys_num)
    {
-        asm volatile("int $0x42" : : "a"(sys_num));
+        long int result;
+        asm volatile("int $0x42" : "=a"(result) : "a"(sys_num));
+        return result;
    }
 }