mirror of
https://github.com/SerenityOS/serenity
synced 2024-10-17 13:22:58 +00:00
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. :^)
65 lines
2.2 KiB
C++
65 lines
2.2 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <Kernel/IO.h>
|
|
#include <Kernel/KSyms.h>
|
|
#include <Kernel/Process.h>
|
|
#include <Kernel/UserOrKernelBuffer.h>
|
|
|
|
namespace Kernel {
|
|
|
|
int Process::sys$dump_backtrace()
|
|
{
|
|
dump_backtrace();
|
|
return 0;
|
|
}
|
|
|
|
int Process::sys$dbgputch(u8 ch)
|
|
{
|
|
IO::out8(0xe9, ch);
|
|
return 0;
|
|
}
|
|
|
|
int Process::sys$dbgputstr(Userspace<const u8*> characters, int length)
|
|
{
|
|
if (length <= 0)
|
|
return 0;
|
|
|
|
auto buffer = UserOrKernelBuffer::for_user_buffer(characters, length);
|
|
if (!buffer.has_value())
|
|
return -EFAULT;
|
|
ssize_t nread = buffer.value().read_buffered<1024>(length, [&](const u8* buffer, size_t buffer_size) {
|
|
for (size_t i = 0; i < buffer_size; ++i)
|
|
IO::out8(0xe9, buffer[i]);
|
|
return (ssize_t)buffer_size;
|
|
});
|
|
if (nread < 0)
|
|
return (int)nread;
|
|
return 0;
|
|
}
|
|
|
|
}
|