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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: Aaron Lewis <aaronlewis@google.com> Link: https://lore.kernel.org/r/20230729003643.1053367-5-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
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@ -204,6 +204,7 @@ endif
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CFLAGS += -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 \
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-Wno-gnu-variable-sized-type-not-at-end -MD\
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-fno-builtin-memcmp -fno-builtin-memcpy -fno-builtin-memset \
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-fno-builtin-strnlen \
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-fno-stack-protector -fno-PIE -I$(LINUX_TOOL_INCLUDE) \
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-I$(LINUX_TOOL_ARCH_INCLUDE) -I$(LINUX_HDR_PATH) -Iinclude \
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-I$(<D) -Iinclude/$(ARCH_DIR) -I ../rseq -I.. $(EXTRA_CFLAGS) \
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@ -37,3 +37,12 @@ void *memset(void *s, int c, size_t count)
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*xs++ = c;
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return s;
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}
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size_t strnlen(const char *s, size_t count)
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{
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const char *sc;
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for (sc = s; count-- && *sc != '\0'; ++sc)
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/* nothing */;
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return sc - s;
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}
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