[LinuxBIOS] FILO with the USB
fainshf at gmail.com
Wed Nov 14 20:03:25 CET 2007
It seams that the USB code was taken from the previous version of FILO
but never have been tested.
Some symptoms are
malloc_diag: alloc: 4208 bytes (8 blocks), free: 61320 bytes (1 blocks)
malloc_check: sizes mismatch: 0xa1 vs 0x0 at 00132670
dma_to_td: can not find td
Trying to debug it, I discovered the following piece of code:
void *allot2(size_t size, unsigned int alignment)
unsigned long addrval;
addrval+=alignment+1; // 0x12345600 + 0xff + 1
addrval&=~alignment; // 0x12345700
*(void * *)(addrval-sizeof(unsigned long))=addr;
return (void *)addrval;
void forget2(void *mem)
unsigned long addr=(unsigned long)mem;
free((void *)(*(unsigned long *)addr));
I have 2 questions:
if size = 8 and alignment=256, it writes outside malloc allocation, isn't it?
What was the meaning of the code?
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