Rather than using symlinks to find the vgetrandom-chacha.S file for each
arch, store this in a file that uses the compiler to determine
architecture, and then make use of weak symbols to skip the test on
architectures that don't provide the code.
Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx>
---
tools/arch/arm64/vdso | 1 -
tools/arch/loongarch/vdso | 1 -
tools/arch/powerpc/vdso | 1 -
tools/arch/s390/vdso | 1 -
tools/arch/x86/vdso | 1 -
tools/testing/selftests/vDSO/Makefile | 6 +-----
tools/testing/selftests/vDSO/vdso_test_chacha.c | 6 ++++++
.../selftests/vDSO/vgetrandom-chacha-finder.S | 16 ++++++++++++++++
8 files changed, 23 insertions(+), 10 deletions(-)
delete mode 120000 tools/arch/arm64/vdso
delete mode 120000 tools/arch/loongarch/vdso
delete mode 120000 tools/arch/powerpc/vdso
delete mode 120000 tools/arch/s390/vdso
delete mode 120000 tools/arch/x86/vdso
create mode 100644 tools/testing/selftests/vDSO/vgetrandom-chacha-finder.S
diff --git a/tools/arch/arm64/vdso b/tools/arch/arm64/vdso
deleted file mode 120000
index 233c7a26f6e5..000000000000
--- a/tools/arch/arm64/vdso
+++ /dev/null
@@ -1 +0,0 @@
-../../../arch/arm64/kernel/vdso
\ No newline at end of file
diff --git a/tools/arch/loongarch/vdso b/tools/arch/loongarch/vdso
deleted file mode 120000
index ebda43a82db7..000000000000
--- a/tools/arch/loongarch/vdso
+++ /dev/null
@@ -1 +0,0 @@
-../../../arch/loongarch/vdso
\ No newline at end of file
diff --git a/tools/arch/powerpc/vdso b/tools/arch/powerpc/vdso
deleted file mode 120000
index 4e676d1d1cb4..000000000000
--- a/tools/arch/powerpc/vdso
+++ /dev/null
@@ -1 +0,0 @@
-../../../arch/powerpc/kernel/vdso
\ No newline at end of file
diff --git a/tools/arch/s390/vdso b/tools/arch/s390/vdso
deleted file mode 120000
index 6cf4c1cebdcd..000000000000
--- a/tools/arch/s390/vdso
+++ /dev/null
@@ -1 +0,0 @@
-../../../arch/s390/kernel/vdso64
\ No newline at end of file
diff --git a/tools/arch/x86/vdso b/tools/arch/x86/vdso
deleted file mode 120000
index 7eb962fd3454..000000000000
--- a/tools/arch/x86/vdso
+++ /dev/null
@@ -1 +0,0 @@
-../../../arch/x86/entry/vdso/
\ No newline at end of file
diff --git a/tools/testing/selftests/vDSO/Makefile b/tools/testing/selftests/vDSO/Makefile
index 96b4f2a766e2..e453c178d97f 100644
--- a/tools/testing/selftests/vDSO/Makefile
+++ b/tools/testing/selftests/vDSO/Makefile
@@ -1,6 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
include ../../../scripts/Makefile.arch
-top_srcdir = $(realpath ../../../..)
TEST_GEN_PROGS := vdso_test_gettimeofday
TEST_GEN_PROGS += vdso_test_getcpu
@@ -11,15 +10,12 @@ TEST_GEN_PROGS += vdso_standalone_test_x86
endif
TEST_GEN_PROGS += vdso_test_correctness
TEST_GEN_PROGS += vdso_test_getrandom
-ifneq ($(wildcard $(top_srcdir)/tools/arch/$(SRCARCH)/vdso/vgetrandom-chacha.S),)
TEST_GEN_PROGS += vdso_test_chacha
-endif
CFLAGS := -std=gnu99 -O2
ifeq ($(CONFIG_X86_32),y)
LDLIBS += -lgcc_s
-TEST_GEN_PROGS := $(filter-out vdso_test_chacha,$(TEST_GEN_PROGS))
endif
include ../lib.mk
@@ -39,7 +35,7 @@ $(OUTPUT)/vdso_test_getrandom: CFLAGS += -isystem $(top_srcdir)/tools/include \
$(KHDR_INCLUDES) \
-isystem $(top_srcdir)/include/uapi
-$(OUTPUT)/vdso_test_chacha: $(top_srcdir)/tools/arch/$(SRCARCH)/vdso/vgetrandom-chacha.S
+$(OUTPUT)/vdso_test_chacha: vgetrandom-chacha-finder.S
$(OUTPUT)/vdso_test_chacha: CFLAGS += -idirafter $(top_srcdir)/tools/include \
-idirafter $(top_srcdir)/tools/include/generated \
-idirafter $(top_srcdir)/arch/$(SRCARCH)/include \
diff --git a/tools/testing/selftests/vDSO/vdso_test_chacha.c b/tools/testing/selftests/vDSO/vdso_test_chacha.c
index 60c5ea5cb925..e68f1cd4ebcf 100644
--- a/tools/testing/selftests/vDSO/vdso_test_chacha.c
+++ b/tools/testing/selftests/vDSO/vdso_test_chacha.c
@@ -78,6 +78,12 @@ typedef uint32_t u32;
typedef uint64_t u64;
#include <vdso/getrandom.h>
+__attribute__((weak))
+void __arch_chacha20_blocks_nostack(u8 *dst_bytes, const u32 *key, u32 *counter, size_t nblocks)
+{
+ ksft_exit_skip("Not implemented on architecture\n");
+}
+
int main(int argc, char *argv[])
{
enum { TRIALS = 1000, BLOCKS = 128, BLOCK_SIZE = 64 };
diff --git a/tools/testing/selftests/vDSO/vgetrandom-chacha-finder.S b/tools/testing/selftests/vDSO/vgetrandom-chacha-finder.S
new file mode 100644
index 000000000000..1ca240ddaab7
--- /dev/null
+++ b/tools/testing/selftests/vDSO/vgetrandom-chacha-finder.S
@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2024 Jason A. Donenfeld <Jason@xxxxxxxxx>. All Rights Reserved.
+ */
+
+#if defined(__aarch64__)
+#include "../../../../arch/arm64/kernel/vdso/vgetrandom-chacha.S"
+#elif defined(__loongarch__)
+#include "../../../../arch/loongarch/vdso/vgetrandom-chacha.S"
+#elif defined(__powerpc__) || defined(__powerpc64__)
+#include "../../../../arch/powerpc/kernel/vdso/vgetrandom-chacha.S"
+#elif defined(__s390x__)
+#include "../../../../arch/s390/kernel/vdso64/vgetrandom-chacha.S"
+#elif defined(__x86_64__)
+#include "../../../../arch/x86/entry/vdso/vgetrandom-chacha.S"
+#endif
--
2.46.0
