sysdeps/powerpc/powerpc32/setjmp-common.S

   1 /* setjmp for PowerPC.
   2    Copyright (C) 1995-2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sysdep.h>
  20 #include <stap-probe.h>
  21 #define _ASM
  22 #ifdef __NO_VMX__
  23 # include <novmxsetjmp.h>
  24 #else
  25 # include <jmpbuf-offsets.h>
  26 #endif
  27
  28 #if defined __SPE__ || (defined __NO_FPRS__ && !defined _SOFT_FLOAT)
  29 # define SAVE_GP(N)     evstdd r##N,((JB_FPRS+((N)-14)*2)*4)(3)
  30 #else
  31 # define SAVE_GP(N)     stw r##N,((JB_GPRS+(N)-14)*4)(3)
  32 #endif
  33
  34 ENTRY (__sigsetjmp_symbol)
  35
  36 #ifdef PTR_MANGLE
  37         mr   r5,r1
  38         PTR_MANGLE(r5, r10)
  39         stw  r5,(JB_GPR1*4)(3)
  40 #else
  41         stw  r1,(JB_GPR1*4)(3)
  42 #endif
  43         mflr r0
  44         /* setjmp probe expects longjmp first argument (4@3), second argument
  45            (-4@4), and target address (4@0), respectively.  */
  46         LIBC_PROBE (setjmp, 3, 4@3, -4@4, 4@0)
  47         SAVE_GP (14)
  48 #ifdef PTR_MANGLE
  49         PTR_MANGLE2 (r0, r10)
  50         li   r10,0
  51 #endif
  52         stw  r0,(JB_LR*4)(3)
  53         SAVE_GP (15)
  54         mfcr r0
  55         SAVE_GP (16)
  56         stw  r0,(JB_CR*4)(3)
  57         SAVE_GP (17)
  58         SAVE_GP (18)
  59         SAVE_GP (19)
  60         SAVE_GP (20)
  61         SAVE_GP (21)
  62         SAVE_GP (22)
  63         SAVE_GP (23)
  64         SAVE_GP (24)
  65         SAVE_GP (25)
  66         SAVE_GP (26)
  67         SAVE_GP (27)
  68         SAVE_GP (28)
  69         SAVE_GP (29)
  70         SAVE_GP (30)
  71         SAVE_GP (31)
  72 #if IS_IN (rtld)
  73         li   r3,0
  74         blr
  75 #else
  76         b __sigjmp_save_symbol@local
  77 #endif
  78 END (__sigsetjmp_symbol)