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47 lines
891 B
C
47 lines
891 B
C
/*
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* l4/posix glue for fork()
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*
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* Copyright (C) 2008 Bahadir Balban
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <l4lib/arch/syscalls.h>
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#include <l4lib/arch/syslib.h>
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#include <l4lib/ipcdefs.h>
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#include <l4lib/utcb.h>
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#include <l4/macros.h>
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#include INC_GLUE(memory.h)
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static inline int l4_fork(void)
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{
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int err;
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/* Call pager with open() request. Check ipc error. */
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if ((err = l4_sendrecv(PAGER_TID, PAGER_TID, L4_IPC_TAG_FORK)) < 0) {
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printf("%s: L4 IPC Error: %d.\n", __FUNCTION__, err);
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return err;
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}
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/* Check if syscall itself was successful */
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if ((err = l4_get_retval()) < 0) {
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printf("%s: OPEN Error: %d.\n", __FUNCTION__, err);
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return err;
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}
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return err;
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}
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int fork(void)
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{
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int ret = l4_fork();
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/* If error, return positive error code */
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if (ret < 0) {
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errno = -ret;
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return -1;
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}
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/* else return value */
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return ret;
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}
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