implement arm eabi mem* functions

these functions are part of the ARM EABI, meaning compilers may
generate references to them. known versions of gcc do not use them,
but llvm does. they are not provided by libgcc, and the de facto
standard seems to be that libc provides them.

4 files changed, 36 insertions, 0 deletions

diff --git a/arch/arm/src/__aeabi_memclr.c b/arch/arm/src/__aeabi_memclr.c
new file mode 100644
index 00000000..a25306d7
--- /dev/null
+++ b/arch/arm/src/__aeabi_memclr.c
@@ -0,0 +1,9 @@
+#include <string.h>
+#include "libc.h"
+
+void __aeabi_memclr(void *dest, size_t n)
+{
+	memset(dest, 0, n);
+}
+weak_alias(__aeabi_memclr, __aeabi_memclr4);
+weak_alias(__aeabi_memclr, __aeabi_memclr8);
diff --git a/arch/arm/src/__aeabi_memcpy.c b/arch/arm/src/__aeabi_memcpy.c
new file mode 100644
index 00000000..4ae5c777
--- /dev/null
+++ b/arch/arm/src/__aeabi_memcpy.c
@@ -0,0 +1,9 @@
+#include <string.h>
+#include "libc.h"
+
+void __aeabi_memcpy(void *restrict dest, const void *restrict src, size_t n)
+{
+	memcpy(dest, src, n);
+}
+weak_alias(__aeabi_memcpy, __aeabi_memcpy4);
+weak_alias(__aeabi_memcpy, __aeabi_memcpy8);
diff --git a/arch/arm/src/__aeabi_memmove.c b/arch/arm/src/__aeabi_memmove.c
new file mode 100644
index 00000000..951e7d39
--- /dev/null
+++ b/arch/arm/src/__aeabi_memmove.c
@@ -0,0 +1,9 @@
+#include <string.h>
+#include "libc.h"
+
+void __aeabi_memmove(void *dest, const void *src, size_t n)
+{
+	memmove(dest, src, n);
+}
+weak_alias(__aeabi_memmove, __aeabi_memmove4);
+weak_alias(__aeabi_memmove, __aeabi_memmove8);
diff --git a/arch/arm/src/__aeabi_memset.c b/arch/arm/src/__aeabi_memset.c
new file mode 100644
index 00000000..89299757
--- /dev/null
+++ b/arch/arm/src/__aeabi_memset.c
@@ -0,0 +1,9 @@
+#include <string.h>
+#include "libc.h"
+
+void __aeabi_memset(void *dest, size_t n, int c)
+{
+	memset(dest, c, n);
+}
+weak_alias(__aeabi_memset, __aeabi_memset4);
+weak_alias(__aeabi_memset, __aeabi_memset8);