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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2007-12-29 01:05:26 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2007-12-29 01:05:26 +0000 |
commit | 1bfc8f64f63f26c6fe29fd2a5566bf84582b2048 (patch) | |
tree | b84c19d6f707c1156c94db5885328675aa37c886 /nuttx/arch/z80/src/common/up_sigdeliver.c | |
parent | 7e806d1ed76f03fbab77ab38b148b2a9c02eeba1 (diff) | |
download | px4-nuttx-1bfc8f64f63f26c6fe29fd2a5566bf84582b2048.tar.gz px4-nuttx-1bfc8f64f63f26c6fe29fd2a5566bf84582b2048.tar.bz2 px4-nuttx-1bfc8f64f63f26c6fe29fd2a5566bf84582b2048.zip |
Import of z80 target
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@455 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/z80/src/common/up_sigdeliver.c')
-rw-r--r-- | nuttx/arch/z80/src/common/up_sigdeliver.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/nuttx/arch/z80/src/common/up_sigdeliver.c b/nuttx/arch/z80/src/common/up_sigdeliver.c new file mode 100644 index 000000000..f8f0c79de --- /dev/null +++ b/nuttx/arch/z80/src/common/up_sigdeliver.c @@ -0,0 +1,137 @@ +/************************************************************ + * common/up_sigdeliver.c + * + * Copyright (C) 2007 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name Gregory Nutt nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************/ + +/************************************************************ + * Included Files + ************************************************************/ + +#include <nuttx/config.h> +#include <sys/types.h> +#include <sched.h> +#include <debug.h> +#include <nuttx/irq.h> +#include <nuttx/arch.h> +#include "os_internal.h" +#include "up_internal.h" +#include "up_arch.h" + +/************************************************************ + * Definitions + ************************************************************/ + +/************************************************************ + * Private Data + ************************************************************/ + +/************************************************************ + * Private Functions + ************************************************************/ + +/************************************************************ + * Public Funtions + ************************************************************/ + +/************************************************************ + * Name: up_sigdeliver + * + * Description: + * This is the a signal handling trampoline. When a + * signal action was posted. The task context was mucked + * with and forced to branch to this location with interrupts + * disabled. + * + ************************************************************/ + +void up_sigdeliver(void) +{ +#ifndef CONFIG_DISABLE_SIGNALS + _TCB *rtcb = (_TCB*)g_readytorun.head; + uint32 regs[XCPTCONTEXT_REGS]; + sig_deliver_t sigdeliver; + + /* Save the errno. This must be preserved throughout the + * signal handling so that the the user code final gets + * the correct errno value (probably EINTR). + */ + + int saved_errno = rtcb->errno; + + up_ledon(LED_SIGNAL); + + dbg("rtcb=%p sigdeliver=%p sigpendactionq.head=%p\n", + rtcb, rtcb->xcp.sigdeliver, rtcb->sigpendactionq.head); + ASSERT(rtcb->xcp.sigdeliver != NULL); + + /* Save the real return state on the stack. */ + + up_copystate(regs, rtcb->xcp.regs); + regs[REG_PC] = rtcb->xcp.saved_pc; + regs[REG_CPSR] = rtcb->xcp.saved_cpsr; + + /* Get a local copy of the sigdeliver function pointer. + * we do this so that we can nullify the sigdeliver + * function point in the TCB and accept more signal + * deliveries while processing the current pending + * signals. + */ + + sigdeliver = rtcb->xcp.sigdeliver; + rtcb->xcp.sigdeliver = NULL; + + /* Then restore the task interrupt state. */ + + irqrestore(regs[REG_CPSR]); + + /* Deliver the signals */ + + sigdeliver(rtcb); + + /* Output any debug messaged BEFORE restoring errno + * (because they may alter errno), then restore the + * original errno that is needed by the user logic + * (it is probably EINTR). + */ + + dbg("Resuming\n"); + rtcb->errno = saved_errno; + + /* Then restore the correct state for this thread of + * execution. + */ + + up_ledoff(LED_SIGNAL); + up_fullcontextrestore(regs); +#endif +} |