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https://github.com/cc65/cc65.git
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88c6dd2da8
The fix avoids any possible problems with how cc65 will handle old-style (K & R) function declarations, in the future.
49 lines
948 B
C
49 lines
948 B
C
/*
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!!DESCRIPTION!! wrapped-call pragma w/ variadic function
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!!ORIGIN!! cc65 regression tests
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!!LICENCE!! Public Domain
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!!AUTHOR!! Lauri Kasanen
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*/
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#include <stdarg.h>
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static unsigned char flag;
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static void trampoline_set(void) {
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// The Y register is used for variadics - save and restore
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asm("sty tmp3");
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asm("ldy tmp4");
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asm("sty %v", flag);
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asm("ldy tmp3");
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asm("jsr callptr4");
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}
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#pragma wrapped-call(push, trampoline_set, 4)
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unsigned adder(unsigned char num, ...);
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#pragma wrapped-call(pop)
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unsigned adder(unsigned char num, ...) {
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unsigned char i;
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unsigned sum = 0;
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va_list ap;
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va_start(ap, num);
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for (i = 0; i < num; i++) {
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sum += va_arg(ap, unsigned);
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}
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va_end(ap);
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return sum;
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}
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int main() {
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flag = 0;
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return adder(3, 0, 5, 500) == 505 && flag == 4 ? 0 : 1;
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}
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