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git://git.musl-libc.org/musl
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685e40bb09
with this patch, the syscallN() functions are no longer needed; a variadic syscall() macro allows syscalls with anywhere from 0 to 6 arguments to be made with a single macro name. also, manually casting each non-integer argument with (long) is no longer necessary; the casts are hidden in the macros. some source files which depended on being able to define the old macro SYSCALL_RETURNS_ERRNO have been modified to directly use __syscall() instead of syscall(). references to SYSCALL_SIGSET_SIZE and SYSCALL_LL have also been changed. x86_64 has not been tested, and may need a follow-up commit to fix any minor bugs/oversights.
33 lines
1.1 KiB
C
33 lines
1.1 KiB
C
#ifndef _SYS_SYSCALL_H
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#define _SYS_SYSCALL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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long __syscall_ret(long);
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long __syscall(long, ...);
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long syscall(long, ...);
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#include <bits/syscall.h>
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#define __syscall1(n,a) __syscall1(n,(long)(a))
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#define __syscall2(n,a,b) __syscall2(n,(long)(a),(long)(b))
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#define __syscall3(n,a,b,c) __syscall3(n,(long)(a),(long)(b),(long)(c))
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#define __syscall4(n,a,b,c,d) __syscall4(n,(long)(a),(long)(b),(long)(c),(long)(d))
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#define __syscall5(n,a,b,c,d,e) __syscall5(n,(long)(a),(long)(b),(long)(c),(long)(d),(long)(e))
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#define __syscall6(n,a,b,c,d,e,f) __syscall6(n,(long)(a),(long)(b),(long)(c),(long)(d),(long)(e),(long)(f))
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#define __SYSCALL_NARGS_X(a,b,c,d,e,f,g,n,...) n
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#define __SYSCALL_NARGS(...) __SYSCALL_NARGS_X(__VA_ARGS__,6,5,4,3,2,1,0)
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#define __SYSCALL_CONCAT_X(a,b) a##b
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#define __SYSCALL_CONCAT(a,b) __SYSCALL_CONCAT_X(a,b)
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#define __SYSCALL_DISP(b,...) __SYSCALL_CONCAT(b,__SYSCALL_NARGS(__VA_ARGS__))(__VA_ARGS__)
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#define __syscall(...) __SYSCALL_DISP(__syscall,__VA_ARGS__)
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#define syscall(...) __syscall_ret(__syscall(__VA_ARGS__))
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#ifdef __cplusplus
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}
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#endif
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#endif
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