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(-)src/lib/libc/sys/mprotect.2 (+16 lines)
Lines 52-57 Link Here
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.Fa prot .
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.Fa prot .
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Not all implementations will guarantee protection on a page basis;
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Not all implementations will guarantee protection on a page basis;
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the granularity of protection changes may be as large as an entire region.
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the granularity of protection changes may be as large as an entire region.
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A region is the virtual address space defined by the start
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and end addresses of a
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.Vt "struct vm_map_entry" .
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.Pp
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Currently these protection bits are known,
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which can be combined, OR'd together:
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.Bl -tag width "PROT_WRITE"
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.It PROT_NONE
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No permissions at all.
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.It PROT_READ
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The pages can be read.
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.It PROT_WRITE
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The pages can be written.
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.It PROT_EXEC
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The pages can be executed.
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.El
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.Sh RETURN VALUES
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.Sh RETURN VALUES
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.Rv -std mprotect
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.Rv -std mprotect
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.Sh ERRORS
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.Sh ERRORS

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