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33 lines
694 B
C
33 lines
694 B
C
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/*
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* Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
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* Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#include <setjmp.h>
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#include <string.h>
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unsigned long __do_user_copy(void *to, const void *from, int n,
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void **fault_addr, void **fault_catcher,
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void (*op)(void *to, const void *from,
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int n), int *faulted_out)
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{
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unsigned long *faddrp = (unsigned long *) fault_addr, ret;
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sigjmp_buf jbuf;
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*fault_catcher = &jbuf;
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if(sigsetjmp(jbuf, 1) == 0){
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(*op)(to, from, n);
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ret = 0;
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*faulted_out = 0;
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}
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else {
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ret = *faddrp;
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*faulted_out = 1;
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}
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*fault_addr = NULL;
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*fault_catcher = NULL;
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return ret;
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}
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