mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-22 15:40:19 +00:00
1682f0b760
SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
147 lines
3.2 KiB
C++
147 lines
3.2 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/PrintfImplementation.h>
|
|
#include <AK/Types.h>
|
|
#include <Kernel/Console.h>
|
|
#include <Kernel/IO.h>
|
|
#include <Kernel/Process.h>
|
|
#include <Kernel/SpinLock.h>
|
|
#include <Kernel/kstdio.h>
|
|
|
|
#include <LibC/stdarg.h>
|
|
|
|
static bool serial_debug;
|
|
// A recursive spinlock allows us to keep writing in the case where a
|
|
// page fault happens in the middle of a dbgln(), etc
|
|
static RecursiveSpinLock s_log_lock;
|
|
|
|
void set_serial_debug(bool on_or_off)
|
|
{
|
|
serial_debug = on_or_off;
|
|
}
|
|
|
|
int get_serial_debug()
|
|
{
|
|
return serial_debug;
|
|
}
|
|
|
|
static void serial_putch(char ch)
|
|
{
|
|
static bool serial_ready = false;
|
|
static bool was_cr = false;
|
|
|
|
if (!serial_ready) {
|
|
IO::out8(0x3F8 + 1, 0x00);
|
|
IO::out8(0x3F8 + 3, 0x80);
|
|
IO::out8(0x3F8 + 0, 0x02);
|
|
IO::out8(0x3F8 + 1, 0x00);
|
|
IO::out8(0x3F8 + 3, 0x03);
|
|
IO::out8(0x3F8 + 2, 0xC7);
|
|
IO::out8(0x3F8 + 4, 0x0B);
|
|
|
|
serial_ready = true;
|
|
}
|
|
|
|
while ((IO::in8(0x3F8 + 5) & 0x20) == 0)
|
|
;
|
|
|
|
if (ch == '\n' && !was_cr)
|
|
IO::out8(0x3F8, '\r');
|
|
|
|
IO::out8(0x3F8, ch);
|
|
|
|
if (ch == '\r')
|
|
was_cr = true;
|
|
else
|
|
was_cr = false;
|
|
}
|
|
|
|
static void console_out(char ch)
|
|
{
|
|
if (serial_debug)
|
|
serial_putch(ch);
|
|
|
|
// It would be bad to reach the assert in Console()::the() and do a stack overflow
|
|
|
|
if (Console::is_initialized()) {
|
|
Console::the().put_char(ch);
|
|
} else {
|
|
IO::out8(0xe9, ch);
|
|
}
|
|
}
|
|
|
|
static void buffer_putch(char*& bufptr, char ch)
|
|
{
|
|
*bufptr++ = ch;
|
|
}
|
|
|
|
// Declare it, so that the symbol is exported, because libstdc++ uses it.
|
|
// However, *only* libstdc++ uses it, and none of the rest of the Kernel.
|
|
extern "C" int sprintf(char* buffer, const char* fmt, ...);
|
|
|
|
int sprintf(char* buffer, const char* fmt, ...)
|
|
{
|
|
va_list ap;
|
|
va_start(ap, fmt);
|
|
int ret = printf_internal(buffer_putch, buffer, fmt, ap);
|
|
buffer[ret] = '\0';
|
|
va_end(ap);
|
|
return ret;
|
|
}
|
|
|
|
static size_t __vsnprintf_space_remaining;
|
|
ALWAYS_INLINE void sized_buffer_putch(char*& bufptr, char ch)
|
|
{
|
|
if (__vsnprintf_space_remaining) {
|
|
*bufptr++ = ch;
|
|
--__vsnprintf_space_remaining;
|
|
}
|
|
}
|
|
|
|
int snprintf(char* buffer, size_t size, const char* fmt, ...)
|
|
{
|
|
va_list ap;
|
|
va_start(ap, fmt);
|
|
if (size) {
|
|
__vsnprintf_space_remaining = size - 1;
|
|
} else {
|
|
__vsnprintf_space_remaining = 0;
|
|
}
|
|
int ret = printf_internal(sized_buffer_putch, buffer, fmt, ap);
|
|
if (__vsnprintf_space_remaining) {
|
|
buffer[ret] = '\0';
|
|
} else if (size > 0) {
|
|
buffer[size - 1] = '\0';
|
|
}
|
|
va_end(ap);
|
|
return ret;
|
|
}
|
|
|
|
static void debugger_out(char ch)
|
|
{
|
|
if (serial_debug)
|
|
serial_putch(ch);
|
|
IO::out8(0xe9, ch);
|
|
}
|
|
|
|
extern "C" void dbgputstr(const char* characters, size_t length)
|
|
{
|
|
if (!characters)
|
|
return;
|
|
ScopedSpinLock lock(s_log_lock);
|
|
for (size_t i = 0; i < length; ++i)
|
|
debugger_out(characters[i]);
|
|
}
|
|
|
|
extern "C" void kernelputstr(const char* characters, size_t length)
|
|
{
|
|
if (!characters)
|
|
return;
|
|
ScopedSpinLock lock(s_log_lock);
|
|
for (size_t i = 0; i < length; ++i)
|
|
console_out(characters[i]);
|
|
}
|