Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame^] | 1 | #include <stdlib.h> |
| 2 | #include <console/console.h> |
| 3 | |
| 4 | #if 0 |
| 5 | #define MALLOCDBG(x) |
| 6 | #else |
| 7 | #define MALLOCDBG(x) printk_spew x |
| 8 | #endif |
| 9 | extern unsigned char _heap, _eheap; |
| 10 | static size_t free_mem_ptr = (size_t)&_heap; /* Start of heap */ |
| 11 | static size_t free_mem_end_ptr = (size_t)&_eheap; /* End of heap */ |
| 12 | |
| 13 | |
| 14 | void malloc_mark(malloc_mark_t *place) |
| 15 | { |
| 16 | *place = free_mem_ptr; |
| 17 | printk_spew("malloc_mark 0x%08lx\n", (unsigned long)free_mem_ptr); |
| 18 | } |
| 19 | |
| 20 | void malloc_release(malloc_mark_t *ptr) |
| 21 | { |
| 22 | free_mem_ptr = *ptr; |
| 23 | printk_spew("malloc_release 0x%08lx\n", (unsigned long)free_mem_ptr); |
| 24 | } |
| 25 | |
| 26 | void *malloc(size_t size) |
| 27 | { |
| 28 | void *p; |
| 29 | |
| 30 | MALLOCDBG(("%s Enter, size %d, free_mem_ptr %p\n", __FUNCTION__, size, free_mem_ptr)); |
| 31 | if (size < 0) |
| 32 | die("Error! malloc: Size < 0"); |
| 33 | if (free_mem_ptr <= 0) |
| 34 | die("Error! malloc: Free_mem_ptr <= 0"); |
| 35 | |
| 36 | free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */ |
| 37 | |
| 38 | p = (void *) free_mem_ptr; |
| 39 | free_mem_ptr += size; |
| 40 | |
| 41 | if (free_mem_ptr >= free_mem_end_ptr) |
| 42 | die("Error! malloc: Free_mem_ptr >= free_mem_end_ptr"); |
| 43 | |
| 44 | MALLOCDBG(("malloc 0x%08lx\n", (unsigned long)p)); |
| 45 | |
| 46 | return p; |
| 47 | } |
| 48 | |
| 49 | void free(void *where) |
| 50 | { |
| 51 | /* Don't care */ |
| 52 | } |