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122 lines
4.1 KiB
C
122 lines
4.1 KiB
C
/******************************************************************************
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* *
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* License Agreement *
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* *
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* Copyright (c) 2004 Altera Corporation, San Jose, California, USA. *
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* All rights reserved. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the "Software"), *
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* to deal in the Software without restriction, including without limitation *
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
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* and/or sell copies of the Software, and to permit persons to whom the *
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* Software is furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in *
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* all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *
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* DEALINGS IN THE SOFTWARE. *
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* *
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* This agreement shall be governed in all respects by the laws of the State *
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* of California and by the laws of the United States of America. *
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* *
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* Altera does not recommend, suggest or require that this reference design *
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* file be used in conjunction or combination with any other product. *
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******************************************************************************/
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#include <signal.h>
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#include <unistd.h>
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#include "sys/alt_errno.h"
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#include "os/alt_syscall.h"
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/*
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* kill() is used by newlib in order to send signals to processes. Since there
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* is only a single process in the HAL, the only valid values for pid are
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* either the current process id, or the broadcast values, i.e. pid must be
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* less than or equal to zero.
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*
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* ALT_KILL is mapped onto the kill() system call in alt_syscall.h
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*/
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int ALT_KILL (int pid, int sig)
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{
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int status = 0;
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if (pid <= 0)
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{
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switch (sig)
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{
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case 0:
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/* The null signal is used to check that a pid is valid. */
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break;
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case SIGABRT:
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case SIGALRM:
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case SIGFPE:
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case SIGILL:
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case SIGKILL:
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case SIGPIPE:
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case SIGQUIT:
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case SIGSEGV:
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case SIGTERM:
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case SIGUSR1:
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case SIGUSR2:
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case SIGBUS:
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case SIGPOLL:
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case SIGPROF:
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case SIGSYS:
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case SIGTRAP:
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case SIGVTALRM:
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case SIGXCPU:
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case SIGXFSZ:
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/*
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* The Posix standard defines the default behaviour for all these signals
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* as being eqivalent to a call to _exit(). No mechanism is provided to
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* change this behaviour.
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*/
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_exit(0);
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case SIGCHLD:
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case SIGURG:
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/*
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* The Posix standard defines these signals to be ignored by default. No
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* mechanism is provided to change this behaviour.
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*/
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break;
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default:
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/* Tried to send an unsupported signal */
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status = EINVAL;
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}
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}
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else if (pid > 0)
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{
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/* Attempted to signal a non-existant process */
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status = ESRCH;
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}
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if (status)
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{
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ALT_ERRNO = status;
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return -1;
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}
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return 0;
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}
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