diff options
Diffstat (limited to 'libc/stdlib/malloc-simple/alloc.c')
| -rw-r--r-- | libc/stdlib/malloc-simple/alloc.c | 29 |
1 files changed, 7 insertions, 22 deletions
diff --git a/libc/stdlib/malloc-simple/alloc.c b/libc/stdlib/malloc-simple/alloc.c index 68cd77665..e017b6cbb 100644 --- a/libc/stdlib/malloc-simple/alloc.c +++ b/libc/stdlib/malloc-simple/alloc.c @@ -1,6 +1,6 @@ /* alloc.c * - * Written by Erik Andersen <andersee@debian.org> + * Written by Erik Andersen <andersee@codepoet.org> * LGPLv2 * * Parts of the memalign code were stolen from malloc-930716. @@ -32,19 +32,17 @@ void *malloc(size_t size) } #ifdef __ARCH_HAS_MMU__ +#define MMAP_FLAGS MAP_PRIVATE | MAP_ANONYMOUS +#else +#define MMAP_FLAGS MAP_SHARED | MAP_ANONYMOUS +#endif + result = mmap((void *) 0, size + sizeof(size_t), PROT_READ | PROT_WRITE, - MAP_PRIVATE | MAP_ANONYMOUS, 0, 0); + MMAP_FLAGS, 0, 0); if (result == MAP_FAILED) return 0; * (size_t *) result = size; return(result + sizeof(size_t)); -#else - result = mmap((void *) 0, size, PROT_READ | PROT_WRITE, - MAP_SHARED | MAP_ANONYMOUS, 0, 0); - if (result == MAP_FAILED) - return 0; - return(result); -#endif } #endif @@ -88,11 +86,7 @@ void *realloc(void *ptr, size_t size) newptr = malloc(size); if (newptr) { memcpy(newptr, ptr, -#ifdef __ARCH_HAS_MMU__ *((size_t *) (ptr - sizeof(size_t))) -#else - size -#endif ); free(ptr); } @@ -111,12 +105,8 @@ void free(void *ptr) return; } } -#ifdef __ARCH_HAS_MMU__ ptr -= sizeof(size_t); munmap(ptr, * (size_t *) ptr + sizeof(size_t)); -#else - munmap(ptr, 0); -#endif } #endif @@ -154,12 +144,8 @@ int __libc_free_aligned(void *ptr) /* Mark the block as free */ l->aligned = NULL; ptr = l->exact; -#ifdef __ARCH_HAS_MMU__ ptr -= sizeof(size_t); munmap(ptr, * (size_t *) ptr + sizeof(size_t)); -#else - munmap(ptr, 0); -#endif return 1; } } @@ -203,4 +189,3 @@ void * memalign (size_t alignment, size_t size) return result; } #endif - |