newlib/libc/machine/pru/setjmp.s

   1 /* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   2  *
   3  * Copyright (c) 2018-2019 Dimitar Dimitrov <dimitar@dinux.eu>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26         .section        .text
  27         .align  3
  28         .globl  setjmp
  29         .type   setjmp,@function
  30         .globl  longjmp
  31         .type   longjmp,@function
  32
  33
  34 setjmp:
  35         sbbo    r2, r14, 0, 4*12        /* SP, RA, FP, r5-r13 */
  36         ldi     r14, 0
  37         ret
  38
  39 longjmp:
  40         lbbo    r2, r14, 0, 4*12        /* SP, RA, FP, r5-r13 */
  41         mov     r14, r15                /* copy second arg to return location */
  42         qbne    1f, r14, 0              /* per stdC, we cannot return 0 */
  43         ldi     r14, 1
  44 1:
  45         ret