lib/libc/arch/powerpc/SYS.h

   1 /*      $NetBSD: SYS.h,v 1.12 2011/01/15 07:31:12 matt Exp $    */
   2
   3 #include <machine/asm.h>
   4 #include <sys/syscall.h>
   5
   6 #ifdef __STDC__
   7 #define _DOSYSCALL(x)           li      %r0,(SYS_ ## x)         ;\
   8                                 sc
   9 #else
  10 #define _DOSYSCALL(x)           li      %r0,(SYS_/**/x)         ;\
  11                                 sc
  12 #endif /* __STDC__ */
  13
  14 #define _SYSCALL_NOERROR(x,y)   .text                           ;\
  15                                 .align  2                       ;\
  16                         ENTRY(x)                                ;\
  17                                 _DOSYSCALL(y)
  18
  19 #define _SYSCALL(x,y)           .text                           ;\
  20                                 .align  2                       ;\
  21                         2:      b       _C_LABEL(__cerror)      ;\
  22                                 _SYSCALL_NOERROR(x,y)           ;\
  23                                 bso     2b
  24
  25 #define SYSCALL_NOERROR(x)      _SYSCALL_NOERROR(x,x)
  26
  27 #define SYSCALL(x)              _SYSCALL(x,x)
  28
  29 #define PSEUDO_NOERROR(x,y)     _SYSCALL_NOERROR(x,y)           ;\
  30                                 blr                             ;\
  31                                 END(x)
  32
  33 #define PSEUDO(x,y)             _SYSCALL_NOERROR(x,y)           ;\
  34                                 bnslr                           ;\
  35                                 b       _C_LABEL(__cerror)      ;\
  36                                 END(x)
  37
  38 #define RSYSCALL_NOERROR(x)     PSEUDO_NOERROR(x,x)
  39
  40 #define RSYSCALL(x)             PSEUDO(x,x)
  41
  42 #define WSYSCALL(weak,strong)   WEAK_ALIAS(weak,strong)         ;\
  43                                 PSEUDO(strong,weak)