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71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
/* Copyright (C) 1991-2015 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <setjmp.h>
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/* Save the current program position in ENV and return 0. */
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int
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#if defined BSD_SETJMP
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# undef setjmp
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# define savemask 1
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setjmp (jmp_buf env)
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#elif defined BSD__SETJMP
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# undef _setjmp
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# define savemask 0
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_setjmp (jmp_buf env)
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#else
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__sigsetjmp (jmp_buf env, int savemask)
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#endif
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{
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/* Save data registers D1 through D7. */
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asm volatile ("movem%.l %/d1-%/d7, %0"
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: : "m" (env[0].__jmpbuf[0].__dregs[0]));
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/* Save return address in place of register A0. */
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env[0].__jmpbuf[0].__aregs[0] = __builtin_return_address (0);
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/* Save address registers A1 through A5. */
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asm volatile ("movem%.l %/a1-%/a5, %0"
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: : "m" (env[0].__jmpbuf[0].__aregs[1]));
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/* Save caller's FP, not our own. */
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env[0].__jmpbuf[0].__fp = *(int **) __builtin_frame_address (0);
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/* Save caller's SP, not our own. */
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env[0].__jmpbuf[0].__sp = (int *) __builtin_frame_address (0) + 2;
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#if defined __HAVE_68881__ || defined __HAVE_FPU__
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/* Save floating-point (68881) registers FP0 through FP7. */
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asm volatile ("fmovem%.x %/fp0-%/fp7, %0"
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: : "m" (env[0].__jmpbuf[0].__fpregs[0]));
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#elif defined (__mcffpu__)
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asm volatile ("fmovem %/fp0-%/fp7, %0"
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: : "m" (env[0].__jmpbuf[0].__fpregs[0]));
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#endif
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#if IS_IN (rtld)
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/* In ld.so we never save the signal mask. */
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return 0;
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#else
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/* Save the signal mask if requested. */
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return __sigjmp_save (env, savemask);
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#endif
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}
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#if !defined BSD_SETJMP && !defined BSD__SETJMP
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libc_hidden_def (__sigsetjmp)
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#endif
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