testdata: add big-endian binaries

Signed-off-by: Ilya Leoshkevich <[email protected]>

elf_reader_test.go

@@ -2,6 +2,7 @@ package ebpf
 
 import (
 	"flag"
+	"fmt"
 	"path/filepath"
 	"reflect"
 	"strings"
@@ -11,7 +12,8 @@ import (
 )
 
 func TestLoadCollectionSpec(t *testing.T) {
-	files, err := filepath.Glob("testdata/loader-*.elf")
+	pattern := fmt.Sprintf("testdata/loader-*-%s.elf", testutils.GetHostEndianness())
+	files, err := filepath.Glob(pattern)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -209,7 +211,8 @@ func TestCollectionSpecDetach(t *testing.T) {
 }
 
 func TestLoadInvalidMap(t *testing.T) {
-	_, err := LoadCollectionSpec("testdata/invalid_map.elf")
+	path := fmt.Sprintf("testdata/invalid_map-%s.elf", testutils.GetHostEndianness())
+	_, err := LoadCollectionSpec(path)
 	t.Log(err)
 	if err == nil {
 		t.Fatal("should be fail")

internal/btf/btf_test.go

@@ -53,7 +53,7 @@ func TestParseCurrentKernelBTF(t *testing.T) {
 }
 
 func TestLoadSpecFromElf(t *testing.T) {
-	fh, err := os.Open("../../testdata/loader-clang-9.elf")
+	fh, err := os.Open(fmt.Sprintf("../../testdata/loader-clang-9-%s.elf", testutils.GetHostEndianness()));
 	if err != nil {
 		t.Fatal(err)
 	}

internal/testutils/endianness.go

@@ -0,0 +1,15 @@
+package testutils
+
+import (
+        "encoding/binary"
+
+	"github.com/cilium/ebpf/internal"
+)
+
+func GetHostEndianness() string {
+	if internal.NativeEndian == binary.LittleEndian {
+		return "el"
+	} else {
+		return "eb"
+	}
+}

testdata/Makefile

@@ -1,19 +1,22 @@
 LLVM_PREFIX ?= /usr/bin
 CLANG ?= $(LLVM_PREFIX)/clang
+CFLAGS := -target bpf -O2 -g -Wall -Werror $(CFLAGS)
 
 .PHONY: all clean
-all: loader-clang-6.0.elf loader-clang-7.elf loader-clang-8.elf loader-clang-9.elf rewrite.elf invalid_map.elf
+all: loader-clang-6.0-el.elf loader-clang-7-el.elf loader-clang-8-el.elf loader-clang-9-el.elf rewrite-el.elf invalid_map-el.elf \
+	loader-clang-6.0-eb.elf loader-clang-7-eb.elf loader-clang-8-eb.elf loader-clang-9-eb.elf rewrite-eb.elf invalid_map-eb.elf
 
 clean:
 	-$(RM) *.elf
 
-loader-%.elf: loader.c
-	$* -target bpf -O2 -g \
-		-Wall -Werror \
-		-c $< -o $@
+loader-%-el.elf: loader.c
+	$* $(CFLAGS) -mlittle-endian -c $< -o $@
 
-%.elf : %.c
-	$(CLANG) -target bpf -O2 -g \
-		-Wall -Werror \
-		-c $< -o $@
+loader-%-eb.elf: loader.c
+	$* $(CFLAGS) -mbig-endian -c $< -o $@
 
+%-el.elf: %.c
+	$(CLANG) $(CFLAGS) -mlittle-endian -c $< -o $@
+
+%-eb.elf : %.c
+	$(CLANG) $(CFLAGS) -mbig-endian -c $< -o $@