kernel,libc: syscall: Improve syscall code

- Remove the SYS_debug syscall
- First syscall starts at 1

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/sys/arch/amd64/amd64/syscall.c b/sys/arch/amd64/amd64/syscall.c
index e80fe94..68235d5 100644
--- a/sys/arch/amd64/amd64/syscall.c
+++ b/sys/arch/amd64/amd64/syscall.c
@@ -42,7 +42,8 @@ __syscall(struct trapframe *tf)
         .sp = tf->rsp
     };
 
-    if (args.code < __MAX_SYSCALLS) {
-        tf->rax = g_syscall_table[tf->rax](&args);
+    if (args.code < __MAX_SYSCALLS && args.code > 0) {
+        args.code -= 1;
+        tf->rax = g_syscall_table[args.code](&args);
     }
 }