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Fix SIGSEGV caused by negative mmoffset in 32bit system #15

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Fix SIGSEGV caused by negative mmoffset in 32bit system #15

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4 changes: 2 additions & 2 deletions util.c
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Original file line number Diff line number Diff line change
Expand Up @@ -213,9 +213,9 @@ void *mem_chunk(off_t base, size_t len, const char *devmem)
}

#ifdef _SC_PAGESIZE
mmoffset = base % sysconf(_SC_PAGESIZE);
mmoffset = base & (sysconf(_SC_PAGESIZE) - 1);
#else
mmoffset = base % getpagesize();
mmoffset = base & (getpagesize() - 1);
#endif /* _SC_PAGESIZE */
/*
* Please note that we don't use mmap() for performance reasons here,
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