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| author | Wolfgang Denk <wd@denx.de> | 2010-01-15 11:20:10 +0100 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2010-01-15 13:26:20 +0100 |
| commit | 2740544881f652566756815dda4da0bcd946e9de (patch) | |
| tree | 2a76867d094fa88bdfdd6c229fa30ad448dd3123 /common/dlmalloc.c | |
| parent | f098337152ca48e135448f5e7836cce938e12bc0 (diff) | |
| download | u-boot-imx-2740544881f652566756815dda4da0bcd946e9de.zip u-boot-imx-2740544881f652566756815dda4da0bcd946e9de.tar.gz u-boot-imx-2740544881f652566756815dda4da0bcd946e9de.tar.bz2 | |
malloc: return NULL if not initialized yet
When malloc() was called before it was properly initialized
(as would happen if when used before relocation to RAM) it returned
random, non-NULL values, which called all kinds of difficult to debug
subsequent errors.
Make sure to return NULL when initialization was not done yet.
Signed-off-by: Wolfgang Denk <wd@denx.de>
Diffstat (limited to 'common/dlmalloc.c')
| -rw-r--r-- | common/dlmalloc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/common/dlmalloc.c b/common/dlmalloc.c index 735b344..205fc40 100644 --- a/common/dlmalloc.c +++ b/common/dlmalloc.c @@ -2179,6 +2179,12 @@ Void_t* mALLOc(bytes) size_t bytes; INTERNAL_SIZE_T nb; + /* check if mem_malloc_init() was run */ + if ((mem_malloc_start == 0) && (mem_malloc_end == 0)) { + /* not initialized yet */ + return 0; + } + if ((long)bytes < 0) return 0; nb = request2size(bytes); /* padded request size; */ |