#include <stdlib.h> #include <console/console.h> #if CONFIG_DEBUG_MALLOC #define MALLOCDBG(x...) printk(BIOS_SPEW, x) #else #define MALLOCDBG(x...) #endif extern unsigned char _heap, _eheap; static void *free_mem_ptr = &_heap; /* Start of heap */ static void *free_mem_end_ptr = &_eheap; /* End of heap */ void *malloc(size_t size) { void *p; MALLOCDBG("%s Enter, size %ld, free_mem_ptr %p\n", __func__, size, free_mem_ptr); /* Checking arguments */ if (size < 0) die("Error! malloc: size < 0"); /* Overzealous linker check */ if (free_mem_ptr <= 0) die("Error! malloc: Free_mem_ptr <= 0"); free_mem_ptr = (void *)ALIGN((unsigned long)free_mem_ptr, 4); p = (void *) free_mem_ptr; free_mem_ptr += size; if (free_mem_ptr >= free_mem_end_ptr) die("Error! malloc: Out of memory (free_mem_ptr >= free_mem_end_ptr)"); MALLOCDBG("malloc %p\n", p); return p; } void free(void *where) { /* Don't care */ MALLOCDBG("free %p\n", where); }