arch/arm/lib/setjmp_aarch64.S

   1 /*
   2  * (C) 2017 Theobroma Systems Design und Consulting GmbH
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <config.h>
   8 #include <asm/macro.h>
   9 #include <linux/linkage.h>
  10
  11 .pushsection .text.setjmp, "ax"
  12 ENTRY(setjmp)
  13         /* Preserve all callee-saved registers and the SP */
  14         stp  x19, x20, [x0,#0]
  15         stp  x21, x22, [x0,#16]
  16         stp  x23, x24, [x0,#32]
  17         stp  x25, x26, [x0,#48]
  18         stp  x27, x28, [x0,#64]
  19         stp  x29, x30, [x0,#80]
  20         mov  x2, sp
  21         str  x2, [x0, #96]
  22         mov  x0, #0
  23         ret
  24 ENDPROC(setjmp)
  25 .popsection
  26
  27 .pushsection .text.longjmp, "ax"
  28 ENTRY(longjmp)
  29         ldp  x19, x20, [x0,#0]
  30         ldp  x21, x22, [x0,#16]
  31         ldp  x23, x24, [x0,#32]
  32         ldp  x25, x26, [x0,#48]
  33         ldp  x27, x28, [x0,#64]
  34         ldp  x29, x30, [x0,#80]
  35         ldr  x2, [x0,#96]
  36         mov  sp, x2
  37         /* Move the return value in place, but return 1 if passed 0. */
  38         adds x0, xzr, x1
  39         csinc x0, x0, xzr, ne
  40         ret
  41 ENDPROC(longjmp)
  42 .popsection