lib/libc/arch/powerpc/SYS.h

   1 /*      $NetBSD: SYS.h,v 1.13 2014/08/23 02:24:22 matt Exp $    */
   2
   3 #include <machine/asm.h>
   4 #include <sys/syscall.h>
   5
   6 #define BRANCH_TO_CERROR()      b       _C_LABEL(__cerror)
   7
   8 #define _DOSYSCALL(x)           li      %r0,(SYS_ ## x)         ;\
   9                                 sc
  10
  11 #define _SYSCALL_NOERROR(x,y)   .text                           ;\
  12                                 .p2align 2                      ;\
  13                         ENTRY(x)                                ;\
  14                                 _DOSYSCALL(y)
  15
  16 #define _SYSCALL(x,y)           .text                           ;\
  17                                 .p2align 2                      ;\
  18                         2:      BRANCH_TO_CERROR()              ;\
  19                                 _SYSCALL_NOERROR(x,y)           ;\
  20                                 bso     2b
  21
  22 #define SYSCALL_NOERROR(x)      _SYSCALL_NOERROR(x,x)
  23
  24 #define SYSCALL(x)              _SYSCALL(x,x)
  25
  26 #define PSEUDO_NOERROR(x,y)     _SYSCALL_NOERROR(x,y)           ;\
  27                                 blr                             ;\
  28                                 END(x)
  29
  30 #define PSEUDO(x,y)             _SYSCALL_NOERROR(x,y)           ;\
  31                                 bnslr                           ;\
  32                                 BRANCH_TO_CERROR()              ;\
  33                                 END(x)
  34
  35 #define RSYSCALL_NOERROR(x)     PSEUDO_NOERROR(x,x)
  36
  37 #define RSYSCALL(x)             PSEUDO(x,x)
  38
  39 #define WSYSCALL(weak,strong)   WEAK_ALIAS(weak,strong)         ;\
  40                                 PSEUDO(strong,weak)