Retro68/gcc/newlib/libc/sys/a29khif/read.S

55 lines
2.0 KiB
ArmAsm
Raw Normal View History

2017-04-11 21:13:36 +00:00
; @(#)_read.s 1.4 90/10/14 21:57:32, AMD
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Copyright 1990 Advanced Micro Devices, Inc.
;
; This software is the property of Advanced Micro Devices, Inc (AMD) which
; specifically grants the user the right to modify, use and distribute this
; software provided this notice is not removed or altered. All other rights
; are reserved by AMD.
;
; AMD MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS
; SOFTWARE. IN NO EVENT SHALL AMD BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL
; DAMAGES IN CONNECTION WITH OR ARISING FROM THE FURNISHING, PERFORMANCE, OR
; USE OF THIS SOFTWARE.
;
; So that all may benefit from your experience, please report any problems
; or suggestions about this software to the 29K Technical Support Center at
; 800-29-29-AMD (800-292-9263) in the USA, or 0800-89-1131 in the UK, or
; 0031-11-1129 in Japan, toll free. The direct dial number is 512-462-4118.
;
; Advanced Micro Devices, Inc.
; 29K Support Products
; Mail Stop 573
; 5900 E. Ben White Blvd.
; Austin, TX 78741
; 800-292-9263
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; _read.s
; int nread = _read( int fd, char *buf, int count );
;
.file "_read.s"
.include "sys/sysmac.h"
.text
.word 0x00050000 ; Debugger tag word
.global __read
;; syscalls used now -- .global _read
__read:
;; syscalls used now -- _read:
.ifdef _BSD_OS
; BSD version - uses readv const tav,HIF_call @ asneq V_SYSCALL,gr1,gr1 @ jmpti tav,lr0 @ const tpc,_errno @ consth tpc,_errno @ store 0,0,tav,tpc @ jmpi lr0 @ constn v0,-1
sub msp, msp, 8
store 0, 0, lr3, msp
add tav, msp, 4
add lr3, msp, 0
store 0, 0, lr4, tav
const lr4, 1
const tav,HIF_readv @ asneq V_SYSCALL,gr1,gr1
jmpti tav, lr0
add msp, msp, 8
const tpc,_errno @ consth tpc,_errno @ store 0,0,tav,tpc @ jmpi lr0 @ constn v0,-1
.else
const tav,HIF_read @ asneq V_SYSCALL,gr1,gr1 @ jmpti tav,lr0 @ const tpc,_errno @ consth tpc,_errno @ store 0,0,tav,tpc @ jmpi lr0 @ constn v0,-1
.endif
.end