Commit a1c1b55e authored by Aaron Lewis's avatar Aaron Lewis Committed by Sean Christopherson
Browse files

KVM: selftests: Add strnlen() to the string overrides 



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: default avatarAaron Lewis <aaronlewis@google.com>
Link: https://lore.kernel.org/r/20230729003643.1053367-5-seanjc@google.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent 6783ca41

tools/testing/selftests/kvm/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -204,6 +204,7 @@ endif 
CFLAGS += -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 \

	-Wno-gnu-variable-sized-type-not-at-end -MD\

	-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) \

tools/testing/selftests/kvm/lib/string_override.c

+9 −0
Original line number Diff line number Diff line
@@ -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;

}