Add checks to selftest
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/programs/test/selftest.c b/programs/test/selftest.c
index b4d7008..13423a1 100644
--- a/programs/test/selftest.c
+++ b/programs/test/selftest.c
@@ -337,6 +337,32 @@
void *pointer;
/*
+ * Check some basic platform requirements as specified in README.md
+ */
+ if (SIZE_MAX < INT_MAX || SIZE_MAX < UINT_MAX) {
+ mbedtls_printf("SIZE_MAX must be at least as big as INT_MAX and UINT_MAX\n");
+ mbedtls_exit(MBEDTLS_EXIT_FAILURE);
+ }
+
+ if (sizeof(int) < 4) {
+ mbedtls_printf("int must be at least 32 bits\n");
+ mbedtls_exit(MBEDTLS_EXIT_FAILURE);
+ }
+
+ if (sizeof(size_t) < 4) {
+ mbedtls_printf("size_t must be at least 32 bits\n");
+ mbedtls_exit(MBEDTLS_EXIT_FAILURE);
+ }
+
+ uint32_t endian_test = 0x12345678;
+ char *p = (char *) &endian_test;
+ if (!(p[0] == 0x12 && p[1] == 0x34 && p[2] == 0x56 && p[3] == 0x78) &&
+ !(p[3] == 0x12 && p[2] == 0x34 && p[1] == 0x56 && p[0] == 0x78)) {
+ mbedtls_printf("Mixed-endian platforms are not supported\n");
+ mbedtls_exit(MBEDTLS_EXIT_FAILURE);
+ }
+
+ /*
* The C standard doesn't guarantee that all-bits-0 is the representation
* of a NULL pointer. We do however use that in our code for initializing
* structures, which should work on every modern platform. Let's be sure.