pkg/csource: fix 32-bit syscall calls

syscall accepts args as ellipsis, resources are uint64
and take 2 slots without the cast, which is wrong.
Cast resources to long when passing to syscall.

1 files changed, 7 insertions, 1 deletions

diff --git a/pkg/csource/csource.go b/pkg/csource/csource.go
index 0b3793afd..46d1711f7 100644
--- a/pkg/csource/csource.go
+++ b/pkg/csource/csource.go
@@ -234,7 +234,13 @@ func (ctx *context) emitCall(w *bytes.Buffer, call prog.ExecCall, ci int, haveCo
 			if arg.Format != prog.FormatNative && arg.Format != prog.FormatBigEndian {
 				panic("sring format in syscall argument")
 			}
-			fmt.Fprintf(w, "%v", ctx.resultArgToStr(arg))
+			val := ctx.resultArgToStr(arg)
+			if native && ctx.target.PtrSize == 4 {
+				// syscall accepts args as ellipsis, resources are uint64
+				// and take 2 slots without the cast, which would be wrong.
+				val = "(long)" + val
+			}
+			fmt.Fprintf(w, "%v", val)
 		default:
 			panic(fmt.Sprintf("unknown arg type: %+v", arg))
 		}