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https://github.com/fluencelabs/musl
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30c1205acd
in general, we aim to always include the header that's declaring a function before defining it so that the compiler can check that prototypes match. additionally, the internal syscall.h declares __syscall_ret with a visibility attribute to improve code generation for shared libc (to prevent gratuitous GOT-register loads). this declaration should be visible at the point where __syscall_ret is defined, too, or the inconsistency could theoretically lead to problems at link-time.
12 lines
142 B
C
12 lines
142 B
C
#include <errno.h>
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#include "syscall.h"
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long __syscall_ret(unsigned long r)
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{
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if (r > -4096UL) {
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errno = -r;
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return -1;
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}
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return r;
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}
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