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Document pragma trampoline

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Lauri Kasanen 2017-05-01 19:50:01 +03:00
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doc/cc65.sgml
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@ -1209,6 +1209,31 @@ parameter with the <tt/#pragma/.
The <tt/#pragma/ understands the push and pop parameters as explained above.
<sect1><tt>#pragma trampoline (&lt;push&rt;, &lt;name&gt;, &lt;value&gt;)</tt><label id="pragma-trampoline"><p>
This pragma sets a trampoline for functions. The name is either
a function returning void and taking no parameters, or the address
of an array in memory (for a RAM trampoline). The value is an
8-bit number that's set to tmp4.
The address of the function is passed in ptr4.
This is useful for example with banked memory, to automatically
switch banks to where this function resides, and then restore
the bank when it returns.
The <tt/#pragma/ requires the push and pop parameters as explained above.
Example:
<tscreen><verb>
void mytrampoline(void);
#pragma trampoline (push, mytrampoline, 0)
void somefunc(void);
#pragma trampoline (pop)
</verb></tscreen>
<sect1><tt>#pragma warn (name, [push,] on|off)</tt><label id="pragma-warn"><p>
Switch compiler warnings on or off. "name" is the name of a warning (see the