lib: os: cbprintf: Fix static packaging for sparc
Sparc architecture is strange. Va_list arguments are packed (1 byte
alignment) while unaligned access fails. Added dedicated handling of
Z_CBPRINTF_STORE_ARG which is copying the data word by word.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
diff --git a/include/sys/cbprintf_internal.h b/include/sys/cbprintf_internal.h
index 9cc3ebb..56c02c7 100644
--- a/include/sys/cbprintf_internal.h
+++ b/include/sys/cbprintf_internal.h
@@ -120,6 +120,26 @@
*
* @param arg Argument.
*/
+#ifdef __sparc__
+static inline void cbprintf_wcpy(int *dst, int *src, uint32_t len)
+{
+ for (int i = 0; i < len; i++) {
+ dst[i] = src[i];
+ }
+}
+/* Sparc is expecting va_list to be packed but don't support unaligned access.*/
+#define Z_CBPRINTF_STORE_ARG(buf, arg) do {\
+ __auto_type _v = (arg) + 0; \
+ double _d = _Generic((arg) + 0, \
+ float : (arg) + 0, \
+ default : \
+ 0.0); \
+ uint32_t _wsize = Z_CBPRINTF_ARG_SIZE(arg) / sizeof(int); \
+ cbprintf_wcpy((int *)buf, \
+ (int *) _Generic((arg) + 0, float : &_d, default : &_v), \
+ _wsize); \
+} while (0)
+#else /* __sparc__ */
#define Z_CBPRINTF_STORE_ARG(buf, arg) \
*_Generic((arg) + 0, \
char : (int *)buf, \
@@ -137,6 +157,7 @@
long double : (long double *)buf, \
default : \
(const void **)buf) = arg
+#endif
/** @brief Return alignment needed for given argument.
*
