77 lines
3.1 KiB
C
77 lines
3.1 KiB
C
/****************************************************************************
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* arch/arm/src/common/arm_signal_dispatch.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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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 <nuttx/arch.h>
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#include <arch/syscall.h>
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#include "arm_internal.h"
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#if !defined(CONFIG_BUILD_FLAT) && defined(__KERNEL__)
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_signal_dispatch
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*
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* Description:
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* In the kernel mode build, this function will be called to execute a
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* a signal handler in user-space. When the signal is delivered, a
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* kernel-mode stub will first run to perform some housekeeping functions.
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* This kernel-mode stub will then be called transfer control to the user
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* mode signal handler by calling this function.
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*
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* Normally the user-mode signaling handling stub will also execute
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* before the ultimate signal handler is called. See
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* arch/arm/src/armvx-y/arm_signal_handler.S. This function is the
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* user-space, signal handler trampoline function. It is called from
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* up_signal_dispatch() in user-mode.
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*
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* Input Parameters:
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* sighand - The address user-space signal handling function
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* signo, info, and ucontext - Standard arguments to be passed to the
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* signal handling function.
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*
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* Returned Value:
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* None. This function does not return in the normal sense. It returns
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* via an architecture specific system call made by up_signal_handler().
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* However, this will look like a normal return by the caller of
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* up_signal_dispatch.
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*
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****************************************************************************/
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void up_signal_dispatch(_sa_sigaction_t sighand, int signo,
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siginfo_t *info, void *ucontext)
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{
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/* Let sys_call4() do all of the work */
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sys_call4(SYS_signal_handler, (uintptr_t)sighand, (uintptr_t)signo,
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(uintptr_t)info, (uintptr_t)ucontext);
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}
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#endif /* !CONFIG_BUILD_FLAT && __KERNEL__ */
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