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0dccc8ba21
debug.h is a NuttX-specific, non-POSIX header. Placing it in the top-level include/ directory creates naming conflicts with external projects that define their own debug.h. This commit moves the canonical header to include/nuttx/debug.h, following the NuttX convention for non-POSIX/non-standard headers, and updates all in-tree references. A backward-compatibility shim is left at include/debug.h that emits a deprecation #warning and re-includes <nuttx/debug.h>, allowing out-of-tree code to continue building while migrating. Signed-off-by: Piyush Patle <piyushpatle228@gmail.com>
118 lines
4.3 KiB
C
118 lines
4.3 KiB
C
/****************************************************************************
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* arch/arm/src/armv7-a/arm_schedulesigaction.c
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*
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* SPDX-License-Identifier: Apache-2.0
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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 <stdint.h>
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#include <sched.h>
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#include <assert.h>
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#include <nuttx/debug.h>
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#include <nuttx/irq.h>
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#include <nuttx/arch.h>
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#include "arm.h"
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#include "sched/sched.h"
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#include "arm_internal.h"
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#include "irq/irq.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_schedule_sigaction
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*
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* Description:
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* This function is called by the OS when one or more
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* signal handling actions have been queued for execution.
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* The architecture specific code must configure things so
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* that the 'sigdeliver' callback is executed on the thread
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* specified by 'tcb' as soon as possible.
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*
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* This function may be called from interrupt handling logic.
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*
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* This operation should not cause the task to be unblocked
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* nor should it cause any immediate execution of sigdeliver.
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* Typically, a few cases need to be considered:
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*
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* (1) This function may be called from an interrupt handler
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* During interrupt processing, all xcptcontext structures
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* should be valid for all tasks. That structure should
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* be modified to invoke sigdeliver() either on return
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* from (this) interrupt or on some subsequent context
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* switch to the recipient task.
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* (2) If not in an interrupt handler and the tcb is NOT
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* the currently executing task, then again just modify
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* the saved xcptcontext structure for the recipient
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* task so it will invoke sigdeliver when that task is
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* later resumed.
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* (3) If not in an interrupt handler and the tcb IS the
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* currently executing task -- just call the signal
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* handler now.
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*
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* Assumptions:
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* Called from critical section
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*
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****************************************************************************/
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void up_schedule_sigaction(struct tcb_s *tcb)
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{
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sinfo("tcb=%p, rtcb=%p current_regs=%p\n", tcb, this_task(),
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this_task()->xcp.regs);
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/* Save the return lr and cpsr and one scratch register. These
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* will be restored by the signal trampoline after the signals
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* have been delivered.
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*/
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/* Save the current register context location */
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tcb->xcp.saved_regs = tcb->xcp.regs;
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/* Duplicate the register context. These will be
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* restored by the signal trampoline after the signal has been
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* delivered.
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*/
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tcb->xcp.regs = (void *)
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((uint32_t)tcb->xcp.regs -
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XCPTCONTEXT_SIZE);
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memcpy(tcb->xcp.regs, tcb->xcp.saved_regs, XCPTCONTEXT_SIZE);
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tcb->xcp.regs[REG_SP] = (uint32_t)tcb->xcp.regs +
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XCPTCONTEXT_SIZE;
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/* Then set up to vector to the trampoline with interrupts
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* disabled
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*/
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tcb->xcp.regs[REG_PC] = (uint32_t)arm_sigdeliver;
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tcb->xcp.regs[REG_CPSR] = (PSR_MODE_SYS | PSR_I_BIT | PSR_F_BIT);
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#ifdef CONFIG_ARM_THUMB
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tcb->xcp.regs[REG_CPSR] |= PSR_T_BIT;
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#endif
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}
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