sysdeps/unix/sysv/linux/sparc/sparc64/getcontext.S

   1 /* Copyright (C) 1997-2016 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Richard Henderson (rth@tamu.edu).
   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 "ucontext_i.h"
  21
  22 /* int getcontext(ucontext_t *); */
  23
  24 ENTRY(__getcontext)
  25
  26         ldx     [%o0 + UC_LINK], %o1    /* Preserve uc_link field, the
  27                                            trap clears it.  */
  28         ta      0x6e
  29 1:
  30         ldx     [%o0 + UC_M_PC], %o2
  31         ldx     [%o0 + UC_M_NPC], %o3
  32         ldx     [%o0 + __UC_SIGMASK], %o4
  33         stx     %o1, [%o0 + UC_LINK]
  34         add     %o2, 2f - 1b, %o2
  35         stx     %o2, [%o0 + UC_M_PC]
  36         add     %o3, 2f - 1b, %o3
  37         stx     %o3, [%o0 + UC_M_NPC]
  38 #if SIGMASK_WORDS == 16
  39         stx     %o4, [%o0 + UC_SIGMASK]
  40         stx     %g0, [%o0 + UC_SIGMASK + 8]
  41         stx     %g0, [%o0 + UC_SIGMASK + 16]
  42         stx     %g0, [%o0 + UC_SIGMASK + 24]
  43         stx     %g0, [%o0 + UC_SIGMASK + 32]
  44         stx     %g0, [%o0 + UC_SIGMASK + 40]
  45         stx     %g0, [%o0 + UC_SIGMASK + 48]
  46         stx     %g0, [%o0 + UC_SIGMASK + 56]
  47         stx     %g0, [%o0 + UC_SIGMASK + 64]
  48         stx     %g0, [%o0 + UC_SIGMASK + 72]
  49         stx     %g0, [%o0 + UC_SIGMASK + 80]
  50         stx     %g0, [%o0 + UC_SIGMASK + 88]
  51         stx     %g0, [%o0 + UC_SIGMASK + 96]
  52         stx     %g0, [%o0 + UC_SIGMASK + 104]
  53         stx     %g0, [%o0 + UC_SIGMASK + 112]
  54         stx     %g0, [%o0 + UC_SIGMASK + 120]
  55 #else
  56 # error Adjust __getcontext
  57 #endif
  58 2:
  59         retl
  60          clr    %o0
  61
  62 END(__getcontext)
  63
  64 weak_alias (__getcontext, getcontext)