[RFC PATCH v1 4/4] riscv: Add test for hwcaps-subdir

[Yao Zihong]

Introduce basic tests for RISC-V glibc-hwcaps subdirs(rva20u64),
similar to existing powerpc/x86 coverage.

Signed-off-by: Yao Zihong <zihong.plct@isrc.iscas.ac.cn>
---
 elf/Makefile                      |  2 +-
 elf/tst-glibc-hwcaps-cache.script | 10 +++++
 sysdeps/riscv/Makefile            |  6 +++
 sysdeps/riscv/tst-glibc-hwcaps.c  | 64 +++++++++++++++++++++++++++++++
 4 files changed, 81 insertions(+), 1 deletion(-)
 create mode 100644 sysdeps/riscv/tst-glibc-hwcaps.c

diff --git a/elf/Makefile b/elf/Makefile
index 5a676f858d..54703e761a 100644
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -2884,7 +2884,7 @@ $(objpfx)argv0test.out: tst-rtld-argv0.sh $(objpfx)ld.so \
 # glibc-hwcaps mechanism for this architecture).  Used to obtain test
 # coverage for some glibc-hwcaps tests for the widest possible range
 # of systems.
-glibc-hwcaps-first-subdirs-for-tests = power9 x86-64-v2 z13
+glibc-hwcaps-first-subdirs-for-tests = power9 x86-64-v2 z13 rva20u64
 
 # The test modules are parameterized by preprocessor macros.
 LDFLAGS-libmarkermod1-1.so += -Wl,-soname,libmarkermod1.so
diff --git a/elf/tst-glibc-hwcaps-cache.script b/elf/tst-glibc-hwcaps-cache.script
index af89e9c6f8..b85b8224bf 100644
--- a/elf/tst-glibc-hwcaps-cache.script
+++ b/elf/tst-glibc-hwcaps-cache.script
@@ -43,3 +43,13 @@ mkdirp 0770 $L/glibc-hwcaps/x86-64-v4
 cp $B/elf/libmarkermod4-2.so $L/glibc-hwcaps/x86-64-v2/libmarkermod4.so
 cp $B/elf/libmarkermod4-3.so $L/glibc-hwcaps/x86-64-v3/libmarkermod4.so
 cp $B/elf/libmarkermod4-4.so $L/glibc-hwcaps/x86-64-v4/libmarkermod4.so
+
+mkdirp 0770 $L/glibc-hwcaps/rva20u64
+cp $B/elf/libmarkermod2-2.so $L/glibc-hwcaps/rva20u64/libmarkermod2.so
+mkdirp 0770 $L/glibc-hwcaps/rva22u64
+cp $B/elf/libmarkermod3-2.so $L/glibc-hwcaps/rva20u64/libmarkermod3.so
+cp $B/elf/libmarkermod3-3.so $L/glibc-hwcaps/rva22u64/libmarkermod3.so
+mkdirp 0770 $L/glibc-hwcaps/rva23u64
+cp $B/elf/libmarkermod4-2.so $L/glibc-hwcaps/rva20u64/libmarkermod4.so
+cp $B/elf/libmarkermod4-3.so $L/glibc-hwcaps/rva22u64/libmarkermod4.so
+cp $B/elf/libmarkermod4-4.so $L/glibc-hwcaps/rva23u64/libmarkermod4.so
diff --git a/sysdeps/riscv/Makefile b/sysdeps/riscv/Makefile
index 7d149d42e6..be49c6fcf5 100644
--- a/sysdeps/riscv/Makefile
+++ b/sysdeps/riscv/Makefile
@@ -37,6 +37,12 @@ $(objpfx)glibc-hwcaps/rva23u64/libmarkermod4.so: $(objpfx)libmarkermod4-4.so
 	$(make-target-directory)
 	cp $< $@
 
+ifeq (no,$(build-hardcoded-path-in-tests))
+# This is an ld.so.cache test, and RPATH/RUNPATH in the executable
+# interferes with its test objectives.
+tests-container += tst-glibc-hwcaps-cache
+endif
+
 endif
 
 # RISC-V's assembler also needs to know about PIC as it changes the definition
diff --git a/sysdeps/riscv/tst-glibc-hwcaps.c b/sysdeps/riscv/tst-glibc-hwcaps.c
new file mode 100644
index 0000000000..c1396cf39b
--- /dev/null
+++ b/sysdeps/riscv/tst-glibc-hwcaps.c
@@ -0,0 +1,64 @@
+/* glibc-hwcaps subdirectory test.  RISC-V version.
+   Copyright (C) 2025 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <support/check.h>
+#include <sys/param.h>
+#include <elf.h>
+#include <get-profile-level.h>
+
+extern int marker2 (void);
+extern int marker3 (void);
+extern int marker4 (void);
+
+/* Return the RISC-V profile level, 1 for the baseline.  */
+static int
+compute_level (void)
+{
+  unsigned int profile_level = get_profile_level ();
+
+  if(profile_level < 20) {
+    return 1;
+  }
+
+  /* v2: RVA20U64 */
+  if(profile_level < 22) {
+    return 2;
+  }
+
+  /* v3: RVA22U64 */
+  if(profile_level < 23) {
+    return 3;
+  }
+
+  /* v4: RVA23U64 */
+  return 4;
+}
+
+static int
+do_test (void)
+{
+  int level = compute_level ();
+  printf ("info: detected RISC-V micro-architecture level: %d\n", level);
+  TEST_COMPARE (marker2 (), MIN (level, 2));
+  TEST_COMPARE (marker3 (), MIN (level, 3));
+  TEST_COMPARE (marker4 (), MIN (level, 4));
+  return 0;
+}
+
+#include <support/test-driver.c>
-- 
2.47.2