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Kernel: Add kernelearlyputstr and use it in dbgln in very-early boot

This variant of dbgputstr does not lock the global log lock, as it is
called before the current or any other processor was initialized,
meaning that:
A) The $gs base was not setup yet, so we cannot enter into critical
   sections, and as a result we cannot use SpinLocks
B) No other processors may try to print at the same time anyway
This commit is contained in:
Idan Horowitz 2021-09-10 21:46:54 +03:00
parent 18d2a74e62
commit 6348b63476
3 changed files with 20 additions and 0 deletions

View file

@ -817,6 +817,14 @@ void vdbgln(StringView fmtstr, TypeErasedFormatParams& params)
const auto string = builder.string_view();
#ifdef __serenity__
# ifdef KERNEL
if (!Kernel::Processor::is_initialized()) {
kernelearlyputstr(string.characters_without_null_termination(), string.length());
return;
}
# endif
#endif
dbgputstr(string.characters_without_null_termination(), string.length());
}