To optimize out calls to undefined functions in PBL at compile-time
instead of link time, let's define stubs for the functions that
are referenced in obj-pbl-y files, but inside function sections
that are ultimately unreferenced.
We don't use IS_PROPER here as we want to fail the build in barebox
proper as before, when HWRNG support is missing.
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
include/stdlib.h | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/include/stdlib.h b/include/stdlib.h
index c427cbc87f6e..20bdc0491e3c 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -2,6 +2,7 @@
#ifndef __STDLIB_H
#define __STDLIB_H
+#include <linux/bug.h>
#include <types.h>
#include <malloc.h>
@@ -13,11 +14,27 @@ unsigned int rand(void);
/* set the seed for rand () */
void srand(unsigned int seed);
+struct hwrng;
+
/* fill a buffer with pseudo-random data */
+#if IN_PROPER
void get_random_bytes(void *buf, int len);
int get_crypto_bytes(void *buf, int len);
-struct hwrng;
int hwrng_get_crypto_bytes(struct hwrng *rng, void *buf, int len);
+#else
+static inline void get_random_bytes(void *buf, int len)
+{
+ BUG();
+}
+static inline int get_crypto_bytes(void *buf, int len)
+{
+ return -ENOSYS;
+}
+static inline int hwrng_get_crypto_bytes(struct hwrng *rng, void *buf, int len)
+{
+ return -ENOSYS;
+}
+#endif
static inline u32 random32(void)
{
--
2.39.5
