diff --git a/arch/risc-v/src/rv32im/up_schedulesigaction.c b/arch/risc-v/src/rv32im/up_schedulesigaction.c deleted file mode 100644 index 44b669acc48..00000000000 --- a/arch/risc-v/src/rv32im/up_schedulesigaction.c +++ /dev/null @@ -1,184 +0,0 @@ -/**************************************************************************** - * arch/risc-v/src/rv32im/up_schedulesigaction.c - * - * Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. The - * ASF licenses this file to you under the Apache License, Version 2.0 (the - * "License"); you may not use this file except in compliance with the - * License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT - * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the - * License for the specific language governing permissions and limitations - * under the License. - * - ****************************************************************************/ - -/**************************************************************************** - * Included Files - ****************************************************************************/ - -#include - -#include -#include -#include - -#include -#include - -#include "sched/sched.h" -#include "riscv_internal.h" -#include "riscv_arch.h" - -#ifndef CONFIG_DISABLE_SIGNALS - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: up_schedule_sigaction - * - * Description: - * This function is called by the OS when one or more - * signal handling actions have been queued for execution. - * The architecture specific code must configure things so - * that the 'igdeliver' callback is executed on the thread - * specified by 'tcb' as soon as possible. - * - * This function may be called from interrupt handling logic. - * - * This operation should not cause the task to be unblocked - * nor should it cause any immediate execution of sigdeliver. - * Typically, a few cases need to be considered: - * - * (1) This function may be called from an interrupt handler - * During interrupt processing, all xcptcontext structures - * should be valid for all tasks. That structure should - * be modified to invoke sigdeliver() either on return - * from (this) interrupt or on some subsequent context - * switch to the recipient task. - * (2) If not in an interrupt handler and the tcb is NOT - * the currently executing task, then again just modify - * the saved xcptcontext structure for the recipient - * task so it will invoke sigdeliver when that task is - * later resumed. - * (3) If not in an interrupt handler and the tcb IS the - * currently executing task -- just call the signal - * handler now. - * - ****************************************************************************/ - -void up_schedule_sigaction(struct tcb_s *tcb, sig_deliver_t sigdeliver) -{ - irqstate_t flags; - - sinfo("tcb=0x%p sigdeliver=0x%p\n", tcb, sigdeliver); - - /* Make sure that interrupts are disabled */ - - flags = enter_critical_section(); - - /* Refuse to handle nested signal actions */ - - if (!tcb->xcp.sigdeliver) - { - /* First, handle some special cases when the signal is - * being delivered to the currently executing task. - */ - - sinfo("rtcb=0x%p g_current_regs=0x%p\n", - this_task(), g_current_regs); - - if (tcb == this_task()) - { - /* CASE 1: We are not in an interrupt handler and - * a task is signalling itself for some reason. - */ - - if (!g_current_regs) - { - /* In this case just deliver the signal now. */ - - sigdeliver(tcb); - } - - /* CASE 2: We are in an interrupt handler AND the - * interrupted task is the same as the one that - * must receive the signal, then we will have to modify - * the return state as well as the state in the TCB. - * - * Hmmm... there looks like a latent bug here: The following - * logic would fail in the strange case where we are in an - * interrupt handler, the thread is signalling itself, but - * a context switch to another task has occurred so that - * g_current_regs does not refer to the thread of this_task()! - */ - - else - { - /* Save the return EPC and STATUS registers. These will be - * restored by the signal trampoline after the signals have - * been delivered. - */ - - tcb->xcp.sigdeliver = sigdeliver; - tcb->xcp.saved_epc = g_current_regs[REG_EPC]; - tcb->xcp.saved_int_ctx = g_current_regs[REG_INT_CTX]; - - /* Then set up to vector to the trampoline with interrupts - * disabled - */ - - g_current_regs[REG_EPC] = (uint32_t)up_sigdeliver; - - /* And make sure that the saved context in the TCB - * is the same as the interrupt return context. - */ - - up_savestate(tcb->xcp.regs); - - sinfo("PC/STATUS Saved: %08x/%08x New: %08x/%08x\n", - tcb->xcp.saved_epc, tcb->xcp.saved_int_ctx, - g_current_regs[REG_EPC], g_current_regs[REG_INT_CTX]); - } - } - - /* Otherwise, we are (1) signaling a task is not running - * from an interrupt handler or (2) we are not in an - * interrupt handler and the running task is signalling - * some non-running task. - */ - - else - { - /* Save the return EPC and STATUS registers. These will be - * restored by the signal trampoline after the signals have - * been delivered. - */ - - tcb->xcp.sigdeliver = sigdeliver; - tcb->xcp.saved_epc = tcb->xcp.regs[REG_EPC]; - tcb->xcp.saved_int_ctx = tcb->xcp.regs[REG_INT_CTX]; - - /* Then set up to vector to the trampoline with interrupts - * disabled - */ - - tcb->xcp.regs[REG_EPC] = (uint32_t)up_sigdeliver; - - sinfo("PC/STATUS Saved: %08x/%08x New: %08x/%08x\n", - tcb->xcp.saved_epc, tcb->xcp.saved_int_ctx, - tcb->xcp.regs[REG_EPC], tcb->xcp.regs[REG_INT_CTX]); - } - } - - leave_critical_section(flags); -} - -#endif /* !CONFIG_DISABLE_SIGNALS */