toolchain/gcc/newlib/libc/sys/a29khif/getenv.s

   1 ; @(#)getenv.s  1.4 90/10/14 21:57:45, AMD
   2 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
   3 ; Copyright 1990 Advanced Micro Devices, Inc.
   4 ;
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  26 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  27 ; getenv.s
  28 ;       char *value = getenv( const char *name );
  29 ;
  30         .file   "getenv.s"
  31
  32         .include "sys/sysmac.h"
  33
  34         .text
  35         .word   0x00030000      ; Debugger tag word
  36         .global _getenv
  37         .global __getenv
  38 _getenv:
  39 __getenv:
  40         const tav,HIF_getenv @ asneq V_SYSCALL,gr1,gr1          ; HIF service trap
  41         jmpti   tav, lr0        ; If tav is true, were finished, return.
  42         const   tpc, _errno
  43         consth  tpc, _errno     ; Otherwise,
  44         store   0, 0, tav, tpc  ;   store error code in _errno,
  45         jmpi    lr0             ;   then return
  46         const   v0, 0           ;   with a value of 0 (NULL pointer).
  47
  48         .end