setjmp_aarch64.S

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    1 /*-
    2  * Copyright (c) 2014 Andrew Turner
    3  * Copyright (c) 2014-2015 The FreeBSD Foundation
    4  * All rights reserved.
    5  *
    6  * Portions of this software were developed by Andrew Turner
    7  * under sponsorship from the FreeBSD Foundation
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  *
   30  */
   31 
   32 
   33 #ifdef __aarch64__
   34 
   35 #define ENTRY(sym) \
   36         .text; \
   37         .globl  sym; \
   38         .balign 2; \
   39         .type   sym,#function; \
   40 sym:
   41 
   42 #define END(sym) \
   43         .size   sym, . - sym
   44 
   45 
   46 ENTRY(setjmp)
   47         /* Store the stack pointer */
   48         mov     x8, sp
   49         str     x8, [x0], #8
   50 
   51         /* Store the general purpose registers and lr */
   52         stp     x19, x20, [x0], #16
   53         stp     x21, x22, [x0], #16
   54         stp     x23, x24, [x0], #16
   55         stp     x25, x26, [x0], #16
   56         stp     x27, x28, [x0], #16
   57         stp     x29, x30, [x0], #16
   58 
   59         /* Return value */
   60         mov     x0, #0
   61         ret
   62 END(setjmp)
   63 
   64 ENTRY(longjmp)
   65         /* Restore the stack pointer */
   66         ldr     x8, [x0], #8
   67         mov     sp, x8
   68 
   69         /* Restore the general purpose registers and lr */
   70         ldp     x19, x20, [x0], #16
   71         ldp     x21, x22, [x0], #16
   72         ldp     x23, x24, [x0], #16
   73         ldp     x25, x26, [x0], #16
   74         ldp     x27, x28, [x0], #16
   75         ldp     x29, x30, [x0], #16
   76 
   77         /* Load the return value */
   78         mov     x0, x1
   79         ret
   80 END(longjmp)
   81 
   82 #ifdef __ELF__
   83 .section .note.GNU-stack,"",%progbits
   84 #endif
   85 
   86 #endif /* __aarch64__ */

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FreeBSD/Linux Kernel Cross Reference sys/contrib/openzfs/module/lua/setjmp/setjmp_aarch64.S

FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/module/lua/setjmp/setjmp_aarch64.S