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Fix function pointers (fixes #86)

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Karol Stasiak
2020-11-18 09:34:02 +01:00
parent fc7643c416
commit 385b2fd40b
3 changed files with 40 additions and 5 deletions
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docs/lang/functions.md
+4 -1
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@@ -39,7 +39,7 @@ Examples:
You are not allowed to call such functions directly.
The function cannot have parameters and the return type should be `void`.
* `kernal_interrupt` – the function is an interrupt handler called from a generic vendor-provider hardware interrupt handler.
* `kernal_interrupt` – the function is an interrupt handler called from a generic vendor-provided hardware interrupt handler.
The hardware instruction handler is assumed to have preserved the CPU registers,
so this function only has to preserve the zeropage pseudoregisters.
An example is the Commodore 64 interrupt handler that calls the function at an address read from $314/$315.
@@ -85,9 +85,12 @@ and return `void` or a value of size max 2 bytes,
can be accessed via a pointer.
void f() {}
void g(byte x) {}
function.void.to.void p = f.pointer
function.byte.to.void p = g.pointer
call(p)
call(p, 13)
The value of the pointer `f.pointer` may not be the same as the value of the function address `f.addr`.