sysdeps/powerpc/longjmp.c

   1 /* Copyright (C) 1991-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 /* Versioned copy of sysdeps/generic/longjmp.c modified for AltiVec support. */
  19
  20 #include  <shlib-compat.h>
  21 #include <stddef.h>
  22 #include <setjmp.h>
  23 #include <signal.h>
  24
  25 #undef longjmp
  26 #undef siglongjmp
  27
  28 extern void __vmx__longjmp (__jmp_buf __env, int __val)
  29      __attribute__ ((noreturn));
  30 extern void __vmx__libc_longjmp (sigjmp_buf env, int val)
  31      __attribute__ ((noreturn));
  32 libc_hidden_proto (__vmx__libc_longjmp)
  33
  34 /* Set the signal mask to the one specified in ENV, and jump
  35    to the position specified in ENV, causing the setjmp
  36    call there to return VAL, or 1 if VAL is 0.  */
  37 void
  38 __vmx__libc_siglongjmp (sigjmp_buf env, int val)
  39 {
  40   /* Perform any cleanups needed by the frames being unwound.  */
  41   _longjmp_unwind (env, val);
  42
  43   if (env[0].__mask_was_saved)
  44     /* Restore the saved signal mask.  */
  45     (void) __sigprocmask (SIG_SETMASK, &env[0].__saved_mask,
  46                           (sigset_t *) NULL);
  47
  48   /* Call the machine-dependent function to restore machine state.  */
  49   __vmx__longjmp (env[0].__jmpbuf, val ?: 1);
  50 }
  51
  52 strong_alias (__vmx__libc_siglongjmp, __vmx__libc_longjmp)
  53 libc_hidden_def (__vmx__libc_longjmp)
  54
  55 strong_alias (__vmx__libc_longjmp, __libc_longjmp)
  56 strong_alias (__vmx__libc_siglongjmp, __libc_siglongjmp)
  57 versioned_symbol (libc, __vmx__libc_siglongjmp, _longjmp, GLIBC_2_3_4);
  58 versioned_symbol (libc, __vmx__libc_siglongjmp, longjmp, GLIBC_2_3_4);
  59 versioned_symbol (libc, __vmx__libc_siglongjmp, siglongjmp, GLIBC_2_3_4);