Inital commit of stm32f4xx framework.

1 files changed, 38 insertions, 0 deletions

diff --git a/stm/malloc0.c b/stm/malloc0.c
new file mode 100644
index 0000000000..55c1ae8044
--- /dev/null
+++ b/stm/malloc0.c
@@ -0,0 +1,38 @@
+#include <stdint.h>
+#include "std.h"
+
+static uint32_t mem = 0;
+
+void *malloc(size_t n) {
+    if (mem == 0) {
+        mem = 0x20008000; // need to use big ram block so we can execute code from it; start up a bit in case that's where bss is...?
+    }
+    void *ptr = (void*)mem;
+    mem = (mem + n + 3) & (~3);
+    if (mem > 0x20000000 + 0x18000) {
+        void __fatal_error(const char*);
+        __fatal_error("out of memory");
+    }
+    return ptr;
+}
+
+void free(void *ptr) {
+}
+
+void *calloc(size_t sz, size_t n) {
+    char *ptr = malloc(sz * n);
+    for (int i = 0; i < sz * n; i++) {
+        ptr[i] = 0;
+    }
+    return ptr;
+}
+
+void *realloc(void *ptr, size_t n) {
+    return malloc(n);
+}
+
+void __assert_func() {
+    printf("\nASSERT FAIL!");
+    for (;;) {
+    }
+}