36 lines
574 B
C++
36 lines
574 B
C++
namespace factor
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{
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inline cell align_page(cell a)
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{
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return align(a,getpagesize());
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}
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/* segments set up guard pages to check for under/overflow.
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size must be a multiple of the page size */
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struct segment {
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cell start;
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cell size;
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cell end;
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explicit segment(cell size, bool executable_p);
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~segment();
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bool underflow_p(cell addr)
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{
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return (addr >= start - getpagesize() && addr < start);
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}
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bool overflow_p(cell addr)
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{
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return (addr >= end && addr < end + getpagesize());
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}
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bool in_segment_p(cell addr)
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{
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return (addr >= start && addr < end);
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}
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};
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}
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