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e46343bf9a
This makes error propagation less cumbersome (and also exposed some places where we were not doing it.)
42 lines
909 B
C++
42 lines
909 B
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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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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KResultOr<int> Process::sys$dump_backtrace()
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{
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dump_backtrace();
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return 0;
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}
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KResultOr<int> Process::sys$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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KResultOr<size_t> 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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return buffer.value().read_buffered<1024>(length, [&](u8 const* 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 buffer_size;
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});
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}
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}
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