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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/KSyms.h>
#include <Kernel/Process.h>
#include <Kernel/UserOrKernelBuffer.h>
#include <Kernel/kstdio.h>
namespace Kernel {
KResultOr<FlatPtr> Process::sys$dump_backtrace()
{
dump_backtrace();
return 0;
}
KResultOr<FlatPtr> Process::sys$dbgputch(u8 ch)
{
dbgputch(ch);
return 0;
}
KResultOr<FlatPtr> Process::sys$dbgputstr(Userspace<const u8*> characters, size_t size)
{
if (size == 0)
return 0;
if (size <= 1024) {
char buffer[1024];
if (!copy_from_user(buffer, characters, size))
return EFAULT;
dbgputstr(buffer, size);
return size;
}
auto result = try_copy_kstring_from_user(reinterpret_cast<char const*>(characters.unsafe_userspace_ptr()), size);
if (result.is_error())
return result.error();
dbgputstr(result.value()->characters(), size);
return size;
}
}
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