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fixed bug #33545: With MEM_USE_POOLS==1, mem_malloc can return an unaligned pointer.
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@ -27,6 +27,10 @@ HISTORY
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++ Bugfixes:
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2011-06-26: Simon Goldschmidt
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* mem.c: fixed bug #33545: With MEM_USE_POOLS==1, mem_malloc can return an
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unaligned pointer.
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2011-06-26: Simon Goldschmidt
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* mem.c: fixed bug #33544 "warning in mem.c in lwip 1.4.0 with NO_SYS=1"
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@ -78,9 +78,10 @@
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void *
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mem_malloc(mem_size_t size)
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{
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void *ret;
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struct memp_malloc_helper *element;
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memp_t poolnr;
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mem_size_t required_size = size + sizeof(struct memp_malloc_helper);
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mem_size_t required_size = size + LWIP_MEM_ALIGN_SIZE(sizeof(struct memp_malloc_helper));
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for (poolnr = MEMP_POOL_FIRST; poolnr <= MEMP_POOL_LAST; poolnr = (memp_t)(poolnr + 1)) {
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#if MEM_USE_POOLS_TRY_BIGGER_POOL
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@ -113,9 +114,9 @@ again:
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/* save the pool number this element came from */
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element->poolnr = poolnr;
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/* and return a pointer to the memory directly after the struct memp_malloc_helper */
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element++;
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ret = (u8_t*)element + LWIP_MEM_ALIGN_SIZE(sizeof(struct memp_malloc_helper));
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return element;
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return ret;
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}
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/**
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@ -128,13 +129,13 @@ again:
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void
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mem_free(void *rmem)
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{
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struct memp_malloc_helper *hmem = (struct memp_malloc_helper*)rmem;
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struct memp_malloc_helper *hmem;
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LWIP_ASSERT("rmem != NULL", (rmem != NULL));
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LWIP_ASSERT("rmem == MEM_ALIGN(rmem)", (rmem == LWIP_MEM_ALIGN(rmem)));
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/* get the original struct memp_malloc_helper */
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hmem--;
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hmem = (struct memp_malloc_helper*)(void*)((u8_t*)rmem - LWIP_MEM_ALIGN_SIZE(sizeof(struct memp_malloc_helper)));
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LWIP_ASSERT("hmem != NULL", (hmem != NULL));
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LWIP_ASSERT("hmem == MEM_ALIGN(hmem)", (hmem == LWIP_MEM_ALIGN(hmem)));
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