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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-03-16 23:36:25 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-03-16 23:36:25 +0000 |
commit | e5fcd6cdd87650d6b7720a7303044e946af353cc (patch) | |
tree | 677edd5697a8f6e0c4d649cfe0e117ab14ee960c /nuttx/arch/z80/src/ez80/ez80_sigdeliver.c | |
parent | 1ea725775cae34ddf86a8b2fca5f4af77fda5e6a (diff) | |
download | nuttx-e5fcd6cdd87650d6b7720a7303044e946af353cc.tar.gz nuttx-e5fcd6cdd87650d6b7720a7303044e946af353cc.tar.bz2 nuttx-e5fcd6cdd87650d6b7720a7303044e946af353cc.zip |
Added EZ80 files
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@738 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/z80/src/ez80/ez80_sigdeliver.c')
-rw-r--r-- | nuttx/arch/z80/src/ez80/ez80_sigdeliver.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/nuttx/arch/z80/src/ez80/ez80_sigdeliver.c b/nuttx/arch/z80/src/ez80/ez80_sigdeliver.c new file mode 100644 index 000000000..8a8d1ab2a --- /dev/null +++ b/nuttx/arch/z80/src/ez80/ez80_sigdeliver.c @@ -0,0 +1,141 @@ +/**************************************************************************** + * arch/z80/src/ez80/ez80_sigdeliver.c + * + * Copyright (C) 2008 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 NuttX 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 "chip/switch.h" +#include "os_internal.h" +#include "up_internal.h" + +#ifndef CONFIG_DISABLE_SIGNALS + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * 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 + FAR _TCB *rtcb = (_TCB*)g_readytorun.head; + chipret_t 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->pterrno; + + 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. */ + + z80_copystate(regs, rtcb->xcp.regs); + regs[XCPT_PC] = rtcb->xcp.saved_pc; + regs[XCPT_I] = rtcb->xcp.saved_i; + + /* 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[XCPT_I]); + + /* 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->pterrno = saved_errno; + + /* Then restore the correct state for this thread of + * execution. + */ + + up_ledoff(LED_SIGNAL); + z80_restoreusercontext(regs); +#endif +} + +#endif /* CONFIG_DISABLE_SIGNALS */ |