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syscall organization overhaul

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now public syscall.h only exposes __NR_* and SYS_* constants and the
variadic syscall function. no macros or inline functions, no
__syscall_ret or other internal details, no 16-/32-bit legacy syscall
renaming, etc. this logic has all been moved to src/internal/syscall.h
with the arch-specific parts in arch/$(ARCH)/syscall_arch.h, and the
amount of arch-specific stuff has been reduced to a minimum.

changes still need to be reviewed/double-checked. minimal testing on
i386 and mips has already been performed.
This commit is contained in:
Rich Felker
2012-09-08 22:43:14 -04:00
parent fe0260400e
commit 208eb584ef
10 changed files with 420 additions and 655 deletions
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include/sys/syscall.h
-18
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@@ -6,28 +6,10 @@ extern "C" {
#include <features.h>
long __syscall_ret(unsigned long);
long __syscall(long, ...);
long syscall(long, ...);
#include <bits/syscall.h>
#define __syscall1(n,a) __syscall1(n,(long)(a))
#define __syscall2(n,a,b) __syscall2(n,(long)(a),(long)(b))
#define __syscall3(n,a,b,c) __syscall3(n,(long)(a),(long)(b),(long)(c))
#define __syscall4(n,a,b,c,d) __syscall4(n,(long)(a),(long)(b),(long)(c),(long)(d))
#define __syscall5(n,a,b,c,d,e) __syscall5(n,(long)(a),(long)(b),(long)(c),(long)(d),(long)(e))
#define __syscall6(n,a,b,c,d,e,f) __syscall6(n,(long)(a),(long)(b),(long)(c),(long)(d),(long)(e),(long)(f))
#define __SYSCALL_NARGS_X(a,b,c,d,e,f,g,n,...) n
#define __SYSCALL_NARGS(...) __SYSCALL_NARGS_X(__VA_ARGS__,6,5,4,3,2,1,0)
#define __SYSCALL_CONCAT_X(a,b) a##b
#define __SYSCALL_CONCAT(a,b) __SYSCALL_CONCAT_X(a,b)
#define __SYSCALL_DISP(b,...) __SYSCALL_CONCAT(b,__SYSCALL_NARGS(__VA_ARGS__))(__VA_ARGS__)
#define __syscall(...) __SYSCALL_DISP(__syscall,__VA_ARGS__)
#define syscall(...) __syscall_ret(__syscall(__VA_ARGS__))
#ifdef __cplusplus
}
#endif