[PATCH V6 5/8] Add strstr to compressed string.c for ARM.
The shared efi-stub-helper.c functions require a strstr implementation.
The EFI stub is part of the decompressor, so it does not use the kernel
strstr() implementation. This patch adds a strstr() implementation to
the string.c file for the decompressor, with the implementation copied
from the arch/x86/boot/string.c file used by the x86 decompressor.
Signed-off-by: Roy Franz
Reviewed-by: Grant Likely
---
arch/arm/boot/compressed/string.c | 21 +
1 file changed, 21 insertions(+)
diff --git a/arch/arm/boot/compressed/string.c
b/arch/arm/boot/compressed/string.c
index 36e53ef..5397792 100644
--- a/arch/arm/boot/compressed/string.c
+++ b/arch/arm/boot/compressed/string.c
@@ -111,6 +111,27 @@ char *strchr(const char *s, int c)
return (char *)s;
}
+/**
+ * strstr - Find the first substring in a %NUL terminated string
+ * @s1: The string to be searched
+ * @s2: The string to search for
+ */
+char *strstr(const char *s1, const char *s2)
+{
+ size_t l1, l2;
+
+ l2 = strlen(s2);
+ if (!l2)
+ return (char *)s1;
+ l1 = strlen(s1);
+ while (l1 >= l2) {
+ l1--;
+ if (!memcmp(s1, s2, l2))
+ return (char *)s1;
+ s1++;
+ }
+ return NULL;
+}
#undef memset
void *memset(void *s, int c, size_t count)
--
1.7.10.4
--
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[PATCH V6 5/8] Add strstr to compressed string.c for ARM.
The shared efi-stub-helper.c functions require a strstr implementation.
The EFI stub is part of the decompressor, so it does not use the kernel
strstr() implementation. This patch adds a strstr() implementation to
the string.c file for the decompressor, with the implementation copied
from the arch/x86/boot/string.c file used by the x86 decompressor.
Signed-off-by: Roy Franz roy.fr...@linaro.org
Reviewed-by: Grant Likely grant.lik...@linaro.org
---
arch/arm/boot/compressed/string.c | 21 +
1 file changed, 21 insertions(+)
diff --git a/arch/arm/boot/compressed/string.c
b/arch/arm/boot/compressed/string.c
index 36e53ef..5397792 100644
--- a/arch/arm/boot/compressed/string.c
+++ b/arch/arm/boot/compressed/string.c
@@ -111,6 +111,27 @@ char *strchr(const char *s, int c)
return (char *)s;
}
+/**
+ * strstr - Find the first substring in a %NUL terminated string
+ * @s1: The string to be searched
+ * @s2: The string to search for
+ */
+char *strstr(const char *s1, const char *s2)
+{
+ size_t l1, l2;
+
+ l2 = strlen(s2);
+ if (!l2)
+ return (char *)s1;
+ l1 = strlen(s1);
+ while (l1 = l2) {
+ l1--;
+ if (!memcmp(s1, s2, l2))
+ return (char *)s1;
+ s1++;
+ }
+ return NULL;
+}
#undef memset
void *memset(void *s, int c, size_t count)
--
1.7.10.4
--
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Please read the FAQ at http://www.tux.org/lkml/
