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

     /*
      * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
      *      The President and Fellows of Harvard College.
      * Copyright (c) 2017 MIPS Technologies, Inc.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    #include <asm/asm.h>
    #include <asm/regdef.h>
    
    /*
     * setjmp and longjmp for MIPS.
     */
    
       .text
       .set noreorder
    
       /*
        * int setjmp(jmp_buf jb);
        *
        * Save the current state so we can return again from the call later
        * if/when longjmp is called. (If the function that called setjmp
        * returns before longjmp is called, the results are undefined. We
        * only need to save registers, not the whole contents of the stack.)
        */
    LEAF(setjmp)
       /*
        * jmp_buf is in a0. We need to save s0-s8, sp, gp, and ra in it.
        * Don't store more registers without adjusting machine/setjmp.h.
        */
    
       REG_S sp, 0(a0)              /* save registers */
       REG_S ra, 1*SZREG(a0)
       REG_S gp, 2*SZREG(a0)
       REG_S s0, 3*SZREG(a0)
       REG_S s1, 4*SZREG(a0)
       REG_S s2, 5*SZREG(a0)
       REG_S s3, 6*SZREG(a0)
       REG_S s4, 7*SZREG(a0)
       REG_S s5, 8*SZREG(a0)
       REG_S s6, 9*SZREG(a0)
       REG_S s7, 10*SZREG(a0)
       REG_S s8, 11*SZREG(a0)
    
       jr ra                /* done */
        move v0, zero       /* return 0 (in delay slot) */
    END(setjmp)
    
    
       /*
        * void longjmp(jmp_buf jb, int code);
        */
    LEAF(longjmp)
       /*
        * jmp_buf is in a0. Return code is in a1.
        * We need to restore s0-s8, sp, gp, and ra from the jmp_buf.
        * The return code is forced to 1 if 0 is passed in.
        */
    
       sltiu t0, a1, 1      /* set t0 to 1 if return code is 0... otherwise 0 */
       addu a1, a1, t0      /* update the return code */
    
       REG_L sp, 0(a0)              /* restore registers */
       REG_L ra, 1*SZREG(a0)
       REG_L gp, 2*SZREG(a0)
       REG_L s0, 3*SZREG(a0)
       REG_L s1, 4*SZREG(a0)
       REG_L s2, 5*SZREG(a0)
       REG_L s3, 6*SZREG(a0)
       REG_L s4, 7*SZREG(a0)
       REG_L s5, 8*SZREG(a0)
       REG_L s6, 9*SZREG(a0)
       REG_L s7, 10*SZREG(a0)
       REG_L s8, 11*SZREG(a0)
    
       jr ra                /* return, to where setjmp was called from */
       move v0, a1         /* set return value */
   END(longjmp)
   
   #ifdef __ELF__
   .section .note.GNU-stack,"",%progbits
   #endif

Cache object: a4bf782f24b8a1ee96d4ccffb3903836