Add strnlen() to the string overrides to allow it to be called in the
guest.
The implementation for strnlen() was taken from the kernel's generic
version, lib/string.c.
This will be needed when printf is introduced.
Signed-off-by: Aaron Lewis <aaronlewis@xxxxxxxxxx>
---
tools/testing/selftests/kvm/Makefile | 1 +
tools/testing/selftests/kvm/lib/string_override.c | 9 +++++++++
2 files changed, 10 insertions(+)
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index 84a627c43795..cda631f10526 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -197,6 +197,7 @@ endif
CFLAGS += -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 \
-Wno-gnu-variable-sized-type-not-at-end \
-fno-builtin-memcmp -fno-builtin-memcpy -fno-builtin-memset \
+ -fno-builtin-strnlen \
-fno-stack-protector -fno-PIE -I$(LINUX_TOOL_INCLUDE) \
-I$(LINUX_TOOL_ARCH_INCLUDE) -I$(LINUX_HDR_PATH) -Iinclude \
-I$(<D) -Iinclude/$(ARCH_DIR) -I ../rseq -I.. $(EXTRA_CFLAGS) \
diff --git a/tools/testing/selftests/kvm/lib/string_override.c b/tools/testing/selftests/kvm/lib/string_override.c
index 632398adc229..5d1c87277c49 100644
--- a/tools/testing/selftests/kvm/lib/string_override.c
+++ b/tools/testing/selftests/kvm/lib/string_override.c
@@ -37,3 +37,12 @@ void *memset(void *s, int c, size_t count)
*xs++ = c;
return s;
}
+
+size_t strnlen(const char *s, size_t count)
+{
+ const char *sc;
+
+ for (sc = s; count-- && *sc != '\0'; ++sc)
+ /* nothing */;
+ return sc - s;
+}
--
2.40.0.rc0.216.gc4246ad0f0-goog
