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https://github.com/RGBCube/serenity
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1730c23775
We forgot to remove the automatic SMAP disablers after fixing up all this code to not access userspace memory directly. Let's lock things down at last. :^)
64 lines
2.2 KiB
C++
64 lines
2.2 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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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 are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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 OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <Kernel/IO.h>
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#include <Kernel/KSyms.h>
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#include <Kernel/Process.h>
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#include <Kernel/UserOrKernelBuffer.h>
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namespace Kernel {
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int Process::sys$dump_backtrace()
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{
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dump_backtrace();
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return 0;
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}
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int Process::sys$dbgputch(u8 ch)
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{
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IO::out8(0xe9, ch);
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return 0;
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}
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int Process::sys$dbgputstr(Userspace<const u8*> characters, int length)
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{
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if (length <= 0)
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return 0;
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auto buffer = UserOrKernelBuffer::for_user_buffer(characters, length);
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if (!buffer.has_value())
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return -EFAULT;
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ssize_t nread = buffer.value().read_buffered<1024>(length, [&](const u8* buffer, size_t buffer_size) {
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for (size_t i = 0; i < buffer_size; ++i)
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IO::out8(0xe9, buffer[i]);
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return (ssize_t)buffer_size;
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});
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if (nread < 0)
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return (int)nread;
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return 0;
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}
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}
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