e9a2e17d1b
In general, higher-level code will atomically verify that the process is not exiting and hold the process. In one case, we were using uwrite() to copy a probed instruction to a per-thread scratch space block, but copyout() can be used for this purpose instead; this change effectively reverts r227291. MFC after: 1 week
54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
/*-
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* Copyright 2016 Mark Johnston <markj@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/proc.h>
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#include <sys/ptrace.h>
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int
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uread(proc_t *p, void *kaddr, size_t len, uintptr_t uaddr)
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{
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ssize_t n;
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n = proc_readmem(curthread, p, uaddr, kaddr, len);
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if (n != len)
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return (ENOMEM);
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return (0);
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}
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int
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uwrite(proc_t *p, void *kaddr, size_t len, uintptr_t uaddr)
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{
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ssize_t n;
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n = proc_writemem(curthread, p, uaddr, kaddr, len);
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if (n != len)
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return (ENOMEM);
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return (0);
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}
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