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Update docs for ssp and sspreq function attributes.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59203 91177308-0d34-0410-b5e6-96231b3b80d8
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Bill Wendling 2008-11-13 01:02:51 +00:00
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docs/LangRef.html
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@ -985,6 +985,18 @@ caller functions. It may dereference pointer arguments and read state that may
be set in the caller. A readonly function always returns the same value (or
throws the same exception) when called with the same set of arguments and global
state.</dd>
<dt><tt><a name="ssp">ssp</a></tt></dt>
<dd>This attribute indicates that the function should emit a stack smashing
protector. It is in the form of a "canary"&mdash;a random value placed on the
stack before the local variables that's checked upon return from the function to
see if it has been overwritten. A heuristic is used to determine if a function
needs stack protectors or not.</dd>
<dt><tt>ssp-req</tt></dt>
<dd>This attribute indicates that the function should <em>always</em> emit a
stack smashing protector. This overrides the <tt><a href="#ssp">ssp</a></tt>
function attribute.</dd>
</dl>
</div>