mirror of
git://git.musl-libc.org/musl
synced 2024-12-23 07:03:16 +00:00
fd142e5ec4
the changes to syscall_ret are mostly no-ops in the generated code, just cleanup of type issues and removal of some implementation-defined behavior. the one exception is the change in the comparison value, which is fixed so that 0xf...f000 (which in principle could be a valid return value for mmap, although probably never in reality) is not treated as an error return.
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(unsigned 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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