lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-08-10 05:03:06 +03:00
Code Activity

Use uintptr_t instead of performing pointer subtraction with a null pointer

Browse Source 
Signed-off-by: Qihao Chencao <twose@qq.com>

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Qihao Chencao
2022-06-28 16:57:55 +08:00
committed by Adhemerval Zanella
parent dab6344279
commit cc4d6614b5
12 changed files with 35 additions and 36 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
elf/dl-minimal-malloc.c
View File

@@ -38,13 +38,13 @@ __minimal_malloc (size_t n)
/* Consume any unused space in the last page of our data segment. */
extern int _end attribute_hidden;
alloc_ptr = &_end;
alloc_end = (void *) 0 + (((alloc_ptr - (void *) 0)
alloc_end = (void *) 0 + ((((uintptr_t) alloc_ptr)
+ GLRO(dl_pagesize) - 1)
& ~(GLRO(dl_pagesize) - 1));
}
/* Make sure the allocation pointer is ideally aligned. */
alloc_ptr = (void *) 0 + (((alloc_ptr - (void *) 0) + MALLOC_ALIGNMENT - 1)
alloc_ptr = (void *) 0 + ((((uintptr_t) alloc_ptr) + MALLOC_ALIGNMENT - 1)
& ~(MALLOC_ALIGNMENT - 1));
if (alloc_ptr + n >= alloc_end || n >= -(uintptr_t) alloc_ptr)