parameter order on the stack reversed for syscalls

1 files changed, 22 insertions, 6 deletions

diff --git a/src/main.go b/src/main.go
index 68db099..e4dfbff 100644
--- a/src/main.go
+++ b/src/main.go
@@ -246,26 +246,42 @@ func X86_64map(op Operation) string{
 	case "number":
 		return fmt.Sprintf("\tpush %d\n", op.intData)
 	case "syscall":
+		/* FIXME: make it more consise */
 		buf := ""
 		switch op.intData {
 		case 7:
+			buf += "\tpop rax\n"
+			buf += "\tpop rdi\n"
+			buf += "\tpop rsi\n"
+			buf += "\tpop rdx\n"
+			buf += "\tpop r10\n"
+			buf +="\tpop r8\n"
 			buf +="\tpop r9\n"
-			fallthrough
 		case 6:
+			buf += "\tpop rax\n"
+			buf += "\tpop rdi\n"
+			buf += "\tpop rsi\n"
+			buf += "\tpop rdx\n"
+			buf += "\tpop r10\n"
 			buf +="\tpop r8\n"
-			fallthrough
 		case 5:
+			buf += "\tpop rax\n"
+			buf += "\tpop rdi\n"
+			buf += "\tpop rsi\n"
+			buf += "\tpop rdx\n"
 			buf += "\tpop r10\n"
-			fallthrough
 		case 4:
+			buf += "\tpop rax\n"
+			buf += "\tpop rdi\n"
+			buf += "\tpop rsi\n"
 			buf += "\tpop rdx\n"
-			fallthrough
 		case 3:
+			buf += "\tpop rax\n"
+			buf += "\tpop rdi\n"
 			buf += "\tpop rsi\n"
-			fallthrough
 		case 2:
+			buf += "\tpop rax\n"
 			buf += "\tpop rdi\n"
-			fallthrough
 		case 1:
 			buf += "\tpop rax\n"
 		}