usr/src/lib/libbc/sparc/inc/SYS.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 !
  23 !       "@(#)SYS.h 1.14 88/02/08"
  24 !       Copyright (c) 1986, 1996 by Sun Microsystems, Inc.
  25 !       All rights reserved.
  26 !
  27
  28 #include <sys/syscall.h>
  29 #include <machine/asm_linkage.h>
  30 #include "PIC.h"
  31
  32 #define SV_ERESTART     91      /* ERESTART is returned by the kernel for
  33                                    restartable system calls */
  34
  35 #define WINDOWSIZE      (16*4)
  36
  37         .global .cerror
  38
  39 #define SYSCALL(x) \
  40         ENTRY(x); \
  41         mov     SYS_/**/x, %g1; \
  42         t       8; \
  43         CERROR(o5)
  44
  45 #define BSDSYSCALL(x) \
  46         ENTRY(_/**/x); \
  47         mov     SYS_/**/x, %g1; \
  48         t       8; \
  49         CERROR(o5)
  50
  51 /*
  52  * SYSREENTRY provides the entry sequence for restartable system calls.
  53  */
  54 #define SYSREENTRY(x)   \
  55         ENTRY(x);       \
  56         st      %o0,[%sp+68]; \
  57 .restart_/**/x:
  58
  59 #define PSEUDO(x, y) \
  60         ENTRY(x); \
  61         mov     SYS_/**/y, %g1; \
  62         t       8;
  63
  64 /*
  65  * SYSCALL_RESTART provides the most common restartable system call sequence.
  66  */
  67 #define SYSCALL_RESTART(x) \
  68         SYSREENTRY(x); \
  69         mov     SYS_/**/x, %g1; \
  70         t       8; \
  71         SYSRESTART(.restart_/**/x)
  72
  73 /*
  74  * SYSREENTRY provides the entry sequence for restartable system calls.
  75  */
  76 #define SYSREENTRY(x) \
  77         ENTRY(x); \
  78         st      %o0,[%sp+68]; \
  79 .restart_/**/x:
  80
  81 /*
  82  * SYSRESTART provides the error handling sequence for restartable
  83  * system calls.
  84  */
  85 #ifdef PIC
  86 #define SYSRESTART(x) \
  87         bcc     noerr; \
  88         cmp     %o0, SV_ERESTART; \
  89         be,a    x; \
  90         ld       [%sp+68], %o0; \
  91         PIC_SETUP(o5); \
  92         ld      [%o5 + .cerror], %o5; \
  93         jmp     %o5; \
  94         .empty; \
  95 noerr:  nop     ;
  96 #else
  97 #define SYSRESTART(x) \
  98         bcc     noerr; \
  99         cmp     %o0, SV_ERESTART; \
 100         be,a    x; \
 101         ld      [%sp+68], %o0; \
 102         ba      .cerror; \
 103         .empty; \
 104 noerr:  nop     ;
 105 #endif
 106
 107 #define RET     retl; nop;
 108
 109 #ifdef PIC
 110 #define CERROR(free_reg) \
 111         bcc     noerr; \
 112         PIC_SETUP(free_reg); \
 113         .empty; \
 114         ld      [%free_reg+ .cerror],%free_reg; \
 115         jmp     %free_reg; \
 116         .empty; \
 117 noerr:  nop;
 118 #else
 119 #define CERROR(free_reg) \
 120         bcc     noerr; \
 121         .empty; \
 122         sethi   %hi(.cerror), %free_reg;\
 123         or      %free_reg, %lo(.cerror), %free_reg;\
 124         jmp     %free_reg;\
 125         .empty;\
 126 noerr: nop;
 127 #endif