sysdeps/powerpc/powerpc32/__longjmp-common.S

   1 /* longjmp 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 LOAD_GP(N)     evldd r##N,((JB_FPRS+((N)-14)*2)*4)(r3)
  30 #else
  31 # define LOAD_GP(N)     lwz r##N,((JB_GPRS+(N)-14)*4)(r3)
  32 #endif
  33
  34 ENTRY (__longjmp_symbol)
  35
  36 #if defined PTR_DEMANGLE || defined CHECK_SP
  37         lwz r24,(JB_GPR1*4)(r3)
  38 # ifdef CHECK_SP
  39 #  ifdef PTR_DEMANGLE
  40         PTR_DEMANGLE3 (r24, r24, r25)
  41 #  endif
  42         CHECK_SP (r24)
  43         mr r1,r24
  44 # endif
  45 #else
  46         lwz r1,(JB_GPR1*4)(r3)
  47 #endif
  48         lwz r0,(JB_LR*4)(r3)
  49         LOAD_GP (14)
  50         LOAD_GP (15)
  51         LOAD_GP (16)
  52         LOAD_GP (17)
  53         LOAD_GP (18)
  54         LOAD_GP (19)
  55         LOAD_GP (20)
  56 #ifdef PTR_DEMANGLE
  57 # ifndef CHECK_SP
  58         PTR_DEMANGLE3 (r1, r24, r25)
  59 # endif
  60         PTR_DEMANGLE2 (r0, r25)
  61 #endif
  62         /* longjmp/longjmp_target probe expects longjmp first argument (4@3),
  63            second argument (-4@4), and target address (4@0), respectively.  */
  64         LIBC_PROBE (longjmp, 3, 4@3, -4@4, 4@0)
  65         mtlr r0
  66         LOAD_GP (21)
  67         LOAD_GP (22)
  68         lwz r5,(JB_CR*4)(r3)
  69         LOAD_GP (23)
  70         LOAD_GP (24)
  71         LOAD_GP (25)
  72         mtcrf 0xFF,r5
  73         LOAD_GP (26)
  74         LOAD_GP (27)
  75         LOAD_GP (28)
  76         LOAD_GP (29)
  77         LOAD_GP (30)
  78         LOAD_GP (31)
  79         LIBC_PROBE (longjmp_target, 3, 4@3, -4@4, 4@0)
  80         mr r3,r4
  81         blr
  82 END (__longjmp_symbol)