sys/targets: introduce HasCallNumber to reduce clutter

This centralizes all strings.HasPrefix(callName, "syz_") checks.

2 files changed, 6 insertions, 4 deletions

diff --git a/sys/syz-sysgen/sysgen.go b/sys/syz-sysgen/sysgen.go
index 2ac48e94e..0459d544f 100644
--- a/sys/syz-sysgen/sysgen.go
+++ b/sys/syz-sysgen/sysgen.go
@@ -12,7 +12,6 @@ import (
 	"path/filepath"
 	"reflect"
 	"sort"
-	"strings"
 	"sync"
 	"text/template"
 
@@ -287,8 +286,7 @@ func generateExecutorSyscalls(target *targets.Target, syscalls []*prog.Syscall,
 		data.Calls = append(data.Calls, newSyscallData(target, c, attrVals[:last+1]))
 		// Some syscalls might not be present on the compiling machine, so we
 		// generate definitions for them.
-		if target.SyscallNumbers && !strings.HasPrefix(c.CallName, "syz_") &&
-			target.NeedSyscallDefine(c.NR) {
+		if target.HasCallNumber(c.CallName) && target.NeedSyscallDefine(c.NR) {
 			defines[target.SyscallPrefix+c.CallName] = fmt.Sprintf("%d", c.NR)
 		}
 	}
@@ -316,7 +314,7 @@ func newSyscallData(target *targets.Target, sc *prog.Syscall, attrs []uint64) Sy
 		Name:     sc.Name,
 		CallName: callName,
 		NR:       int32(sc.NR),
-		NeedCall: (!target.SyscallNumbers || strings.HasPrefix(sc.CallName, "syz_") || patchCallName) && !sc.Attrs.Disabled,
+		NeedCall: (!target.HasCallNumber(sc.CallName) || patchCallName) && !sc.Attrs.Disabled,
 		Attrs:    attrs,
 	}
 }
diff --git a/sys/targets/targets.go b/sys/targets/targets.go
index 99c64725a..67c3161e4 100644
--- a/sys/targets/targets.go
+++ b/sys/targets/targets.go
@@ -46,6 +46,10 @@ type Target struct {
 	timeouts Timeouts
 }
 
+func (target *Target) HasCallNumber(callName string) bool {
+	return target.SyscallNumbers && !strings.HasPrefix(callName, "syz_")
+}
+
 type osCommon struct {
 	// What OS can build native binaries for this OS.
 	// If not set, defaults to itself (i.e. native build).