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84c0f98fb2
This rewrites the dbgputch and dbgputstr system calls as wrappers of kstdio.h. This fixes a bug where only the Kernel's debug output was also sent to a serial debugger, while the userspace's debug output was only sent to the Bochs debugger. This also fixes a bug where debug output from one process would sometimes "interrupt" the debug output from another process in the middle of a line.
38 lines
832 B
C++
38 lines
832 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/KSyms.h>
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#include <Kernel/Process.h>
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#include <Kernel/UserOrKernelBuffer.h>
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#include <Kernel/kstdio.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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dbgputch(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, size_t size)
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{
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if (size == 0)
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return 0;
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auto result = try_copy_kstring_from_user(reinterpret_cast<char const*>(characters.unsafe_userspace_ptr()), size);
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if (result.is_error())
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return result.error();
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dbgputstr(reinterpret_cast<const char*>(result.value()->characters()), size);
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return size;
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}
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}
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