84 lines
3.2 KiB
ArmAsm
84 lines
3.2 KiB
ArmAsm
/****************************************************************************
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* arch/xtensa/src/common/xtensa_sigtramp.S
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*
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* Adapted from use in NuttX by:
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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.file "xtensa_sigtramp.S"
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include "xtensa_abi.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: _xtensa_sig_trampoline
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*
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* Description:
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* Just sets up a proper window call to xtensa_sig_deliver(). We get
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* here via a context switch setup in up_schedule_signaction. Which
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* re-vectors the context switch to this location.
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*
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* Here we just call xtensa_sig_deliver() using the proper ABI. NOTE
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* that this function cannot return and depends on the fact that
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* xtensa_sig_deliver() does not return.
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*
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*
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****************************************************************************/
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.text
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.global _xtensa_sig_trampoline
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.type _xtensa_sig_trampoline, @function
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.align 4
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_xtensa_sig_trampoline:
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ENTRY(16) /* REVISIT: This should not be here */
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#ifdef __XTENSA_CALL0_ABI__
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cali0 xtensa_sig_deliver /* Call xtensa_sig_deliver */
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#else
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call4 xtensa_sig_deliver /* Call xtensa_sig_deliver */
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#endif
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1: j 1b /* xtensa_sig_deliver does not return */
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.size _xtensa_sig_trampoline, . - _xtensa_sig_trampoline
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