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Kernel: Start work on making tty a file 

TTY is now a file that you can read from/write to. I still have
to port shell to use this new interface
This commit is contained in:
Bananymous 2023-04-05 00:56:09 +03:00
parent 783842bac2
commit 7f95444bb5
17 changed files with 718 additions and 491 deletions
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4
kernel/CMakeLists.txt
View File

@ -43,8 +43,8 @@ set(KERNEL_SOURCES
kernel/Storage/StorageDevice.cpp
kernel/Syscall.cpp
kernel/Thread.cpp
kernel/TTY.cpp
kernel/VesaTerminalDriver.cpp
kernel/Terminal/TTY.cpp
kernel/Terminal/VesaTerminalDriver.cpp
userspace/userspace.cpp
icxxabi.cpp
)

4
kernel/include/kernel/FS/Inode.h
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@ -81,8 +81,8 @@ namespace Kernel
virtual BAN::ErrorOr<BAN::RefPtr<Inode>> read_directory_inode(BAN::StringView) { if (!mode().ifdir()) return BAN::Error::from_errno(ENOTDIR); ASSERT_NOT_REACHED(); }
virtual BAN::ErrorOr<BAN::Vector<BAN::String>> read_directory_entries(size_t) { if (!mode().ifdir()) return BAN::Error::from_errno(ENOTDIR); ASSERT_NOT_REACHED(); }
virtual BAN::ErrorOr<size_t> read(size_t, void*, size_t) { if (mode().ifdir()) return BAN::Error::from_errno(EISDIR); ASSERT_NOT_REACHED(); }
virtual BAN::ErrorOr<size_t> write(size_t, void*, size_t) { if (mode().ifdir()) return BAN::Error::from_errno(EISDIR); ASSERT_NOT_REACHED(); }
virtual BAN::ErrorOr<size_t> read(size_t, void*, size_t) { if (mode().ifdir()) return BAN::Error::from_errno(EISDIR); ASSERT_NOT_REACHED(); }
virtual BAN::ErrorOr<size_t> write(size_t, const void*, size_t) { if (mode().ifdir()) return BAN::Error::from_errno(EISDIR); ASSERT_NOT_REACHED(); }
virtual BAN::ErrorOr<void> create_file(BAN::StringView, mode_t) { if (!mode().ifdir()) return BAN::Error::from_errno(ENOTDIR); ASSERT_NOT_REACHED(); }
};

1
kernel/include/kernel/Process.h
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@ -32,6 +32,7 @@ namespace Kernel
BAN::ErrorOr<int> open(BAN::StringView, int);
BAN::ErrorOr<void> close(int);
BAN::ErrorOr<size_t> read(int, void*, size_t);
BAN::ErrorOr<size_t> write(int, const void*, size_t);
BAN::ErrorOr<void> creat(BAN::StringView, mode_t);
BAN::ErrorOr<void> fstat(int, stat*);

6
kernel/include/kernel/Shell.h
View File

@ -3,7 +3,6 @@
#include <BAN/String.h>
#include <BAN/Vector.h>
#include <kernel/Input/KeyEvent.h>
#include <kernel/TTY.h>
namespace Kernel
{
@ -11,7 +10,7 @@ namespace Kernel
class Shell
{
public:
Shell(TTY*);
Shell();
Shell(const Shell&) = delete;
BAN::ErrorOr<void> set_prompt(BAN::StringView);
void run();
@ -23,8 +22,7 @@ namespace Kernel
void key_event_callback(Input::KeyEvent);
BAN::ErrorOr<void> update_prompt();
private:
TTY* m_tty;
private:
BAN::Vector<BAN::String> m_old_buffer;
BAN::Vector<BAN::String> m_buffer;
BAN::String m_prompt_string;

57
kernel/include/kernel/TTY.h
View File

@ -1,57 +0,0 @@
#pragma once
#include <kernel/TerminalDriver.h>
#include <kernel/SpinLock.h>
class TTY
{
public:
TTY(TerminalDriver*);
void clear();
void putchar(char ch);
void write(const char* data, size_t size);
void write_string(const char* data);
void set_cursor_position(uint32_t x, uint32_t y);
void set_font(const Kernel::Font&);
uint32_t height() const { return m_height; }
uint32_t width() const { return m_width; }
void render_from_buffer(uint32_t x, uint32_t y);
// for kprint
static void putchar_current(char ch);
static bool is_initialized();
private:
void reset_ansi_escape();
void handle_ansi_sgr();
void handle_ansi_escape(uint16_t ch);
void putchar_at(uint16_t ch, uint32_t x, uint32_t y);
private:
struct Cell
{
TerminalDriver::Color foreground = TerminalColor::BRIGHT_WHITE;
TerminalDriver::Color background = TerminalColor::BLACK;
uint16_t character = ' ';
};
struct AnsiState
{
uint8_t mode = '\0';
int32_t index = 0;
int32_t nums[2] = { -1, -1 };
};
uint32_t m_width { 0 };
uint32_t m_height { 0 };
uint32_t m_row { 0 };
uint32_t m_column { 0 };
TerminalDriver::Color m_foreground { TerminalColor::BRIGHT_WHITE };
TerminalDriver::Color m_background { TerminalColor::BLACK };
Cell* m_buffer { nullptr };
AnsiState m_ansi_state;
TerminalDriver* m_terminal_driver { nullptr };
Kernel::SpinLock m_lock;
};

113
kernel/include/kernel/Terminal/TTY.h Normal file
View File

@ -0,0 +1,113 @@
#pragma once
#include <BAN/Array.h>
#include <kernel/Device.h>
#include <kernel/Input/KeyEvent.h>
#include <kernel/SpinLock.h>
#include <kernel/Terminal/TerminalDriver.h>
#include <kernel/Terminal/termios.h>
#include <kernel/Semaphore.h>
namespace Kernel
{
class TTY : public CharacterDevice
{
public:
TTY(TerminalDriver*);
void clear();
void putchar(uint8_t ch);
void set_cursor_position(uint32_t x, uint32_t y);
void set_font(const Kernel::Font&);
uint32_t height() const { return m_height; }
uint32_t width() const { return m_width; }
// for kprint
static void putchar_current(uint8_t ch);
static bool is_initialized();
virtual BAN::ErrorOr<size_t> read(size_t, void*, size_t) override;
virtual BAN::ErrorOr<size_t> write(size_t, const void*, size_t) override;
private:
void reset_ansi();
void handle_ansi_csi(uint8_t ch);
void handle_ansi_csi_color();
void putchar_at(uint32_t codepoint, uint32_t x, uint32_t y);
void render_from_buffer(uint32_t x, uint32_t y);
void on_key(Input::KeyEvent);
private:
enum class State
{
Normal,
WaitingAnsiEscape,
WaitingAnsiCSI,
WaitingUTF8,
};
struct AnsiState
{
int32_t nums[2] { -1, -1 };
int32_t index { 0 };
};
struct UTF8State
{
uint32_t codepoint { 0 };
uint8_t bytes_missing { 0 };
};
struct Cell
{
TerminalDriver::Color foreground { TerminalColor::BRIGHT_WHITE };
TerminalDriver::Color background { TerminalColor::BLACK };
uint32_t codepoint { ' ' };
};
private:
Kernel::SpinLock m_lock;
State m_state { State::Normal };
AnsiState m_ansi_state { };
UTF8State m_utf8_state { };
uint32_t m_width { 0 };
uint32_t m_height { 0 };
uint32_t m_row { 0 };
uint32_t m_column { 0 };
Cell* m_buffer { nullptr };
TerminalDriver::Color m_foreground { TerminalColor::BRIGHT_WHITE };
TerminalDriver::Color m_background { TerminalColor::BLACK };
termios m_termios;
struct Buffer
{
BAN::Array<uint8_t, 1024> buffer;
size_t bytes { 0 };
bool flush { false };
Semaphore semaphore;
};
Buffer m_output;
TerminalDriver* m_terminal_driver { nullptr };
public:
virtual Mode mode() const override { return { Mode::IFCHR | Mode::IRUSR }; }
virtual uid_t uid() const override { return 0; }
virtual gid_t gid() const override { return 0; }
virtual dev_t rdev() const override { return m_rdev; }
virtual BAN::StringView name() const { return m_name; }
private:
const dev_t m_rdev;
const BAN::String m_name;
};
}

0
kernel/include/kernel/TerminalDriver.h → kernel/include/kernel/Terminal/TerminalDriver.h
View File

2
kernel/include/kernel/VesaTerminalDriver.h → kernel/include/kernel/Terminal/VesaTerminalDriver.h
View File

@ -1,6 +1,6 @@
#pragma once
#include <kernel/TerminalDriver.h>
#include <kernel/Terminal/TerminalDriver.h>
class VesaTerminalDriver final : public TerminalDriver
{

12
kernel/include/kernel/Terminal/termios.h Normal file
View File

@ -0,0 +1,12 @@
#pragma once
namespace Kernel
{
struct termios
{
bool canonical { true };
bool echo { true };
};
}

6
kernel/include/kernel/kprint.h
View File

@ -1,7 +1,7 @@
#pragma once
#include <BAN/Formatter.h>
#include <kernel/TTY.h>
#include <kernel/Terminal/TTY.h>
#define kprint(...) BAN::Formatter::print(TTY::putchar_current, __VA_ARGS__)
#define kprintln(...) BAN::Formatter::println(TTY::putchar_current, __VA_ARGS__)
#define kprint(...) BAN::Formatter::print(Kernel::TTY::putchar_current, __VA_ARGS__)
#define kprintln(...) BAN::Formatter::println(Kernel::TTY::putchar_current, __VA_ARGS__)

6
kernel/kernel/Debug.cpp
View File

@ -1,6 +1,6 @@
#include <kernel/Debug.h>
#include <kernel/Serial.h>
#include <kernel/TTY.h>
#include <kernel/Terminal/TTY.h>
namespace Debug
{
@ -40,8 +40,8 @@ namespace Debug
{
if (Serial::is_initialized())
return Serial::putchar(ch);
if (TTY::is_initialized())
return TTY::putchar_current(ch);
if (Kernel::TTY::is_initialized())
return Kernel::TTY::putchar_current(ch);
}
}

20
kernel/kernel/Process.cpp
View File

@ -90,6 +90,26 @@ namespace Kernel
return n_read;
}
BAN::ErrorOr<size_t> Process::write(int fd, const void* buffer, size_t count)
{
m_lock.lock();
TRY(validate_fd(fd));
auto open_fd_copy = open_file_description(fd);
m_lock.unlock();
if (!(open_fd_copy.flags & O_RDONLY))
return BAN::Error::from_errno(EBADF);
size_t n_written = TRY(open_fd_copy.inode->write(open_fd_copy.offset, buffer, count));
open_fd_copy.offset += n_written;
m_lock.lock();
MUST(validate_fd(fd));
open_file_description(fd) = open_fd_copy;
m_lock.unlock();
return n_written;
}
BAN::ErrorOr<void> Process::creat(BAN::StringView path, mode_t mode)
{
auto absolute_path = TRY(absolute_path_of(path));

34
kernel/kernel/Shell.cpp
View File

@ -1,12 +1,12 @@
#include <BAN/Math.h>
#include <BAN/ScopeGuard.h>
#include <BAN/StringView.h>
#include <BAN/Vector.h>
#include <kernel/CPUID.h>
#include <kernel/Device.h>
#include <kernel/Font.h>
#include <kernel/IO.h>
#include <kernel/PIT.h>
#include <kernel/PCI.h>
#include <kernel/PIT.h>
#include <kernel/Process.h>
#include <kernel/RTC.h>
#include <kernel/Shell.h>
@ -14,8 +14,8 @@
#include <fcntl.h>
#include <ctype.h>
#define TTY_PRINT(...) BAN::Formatter::print([this](char c) { m_tty->putchar(c); }, __VA_ARGS__)
#define TTY_PRINTLN(...) BAN::Formatter::println([this](char c) { m_tty->putchar(c); }, __VA_ARGS__)
#define TTY_PRINT(...)
#define TTY_PRINTLN(...)
namespace Kernel
{
@ -43,8 +43,7 @@ namespace Kernel
return (const char*)buffer;
};
Shell::Shell(TTY* tty)
: m_tty(tty)
Shell::Shell()
{
MUST(set_prompt(s_default_prompt));
MUST(m_buffer.push_back(""sv));
@ -100,14 +99,17 @@ namespace Kernel
void Shell::run()
{
int fd = MUST(Process::current()->open("/dev/input0"sv, O_RDONLY));
int fd = MUST(Process::current()->open("/dev/tty1"sv, O_RDONLY));
TTY_PRINT("{}", m_prompt);
for (;;)
{
Input::KeyEvent event;
MUST(Process::current()->read(fd, &event, sizeof(event)));
key_event_callback(event);
uint8_t buffer[128];
size_t n_read = MUST(Process::current()->read(fd, buffer, sizeof(buffer)));
dprintln("{}", BAN::StringView((const char*)buffer, n_read));
//Input::KeyEvent event;
//MUST(Process::current()->read(fd, &event, sizeof(event)));
//key_event_callback(event);
}
}
@ -267,8 +269,9 @@ argument_done:
{
if (arguments.size() != 1)
return BAN::Error::from_c_string("'clear' does not support command line arguments");
m_tty->clear();
m_tty->set_cursor_position(0, 0);
//m_tty->clear();
//m_tty->set_cursor_position(0, 0);
TTY_PRINT("\e[2J\e[1;1H"); // clear and reset cursor
}
else if (arguments.front() == "time")
{
@ -301,7 +304,8 @@ argument_done:
PIT::sleep(5000);
if (auto res = shell->process_command(args); res.is_error())
BAN::Formatter::println([&](char c) { shell->m_tty->putchar(c); }, "{}", res.error());
dprintln("{}", res.error());
//BAN::Formatter::println([&](char c) { shell->m_tty->putchar(c); }, "{}", res.error());
};
SpinLock spinlock;
@ -521,7 +525,7 @@ argument_done:
return BAN::Error::from_c_string("usage: 'loadfont font_path'");
auto font = TRY(Font::load(arguments[1]));
m_tty->set_font(font);
//m_tty->set_font(font);
}
else
{
@ -676,7 +680,7 @@ argument_done:
}
}
TTY_PRINT("\e[{}G", (m_prompt_length + m_cursor_pos.col) % m_tty->width() + 1);
//TTY_PRINT("\e[{}G", (m_prompt_length + m_cursor_pos.col) % m_tty->width() + 1);
}
}

392
kernel/kernel/TTY.cpp
View File

@ -1,392 +0,0 @@
#include <BAN/Errors.h>
#include <BAN/ScopeGuard.h>
#include <kernel/Debug.h>
#include <kernel/LockGuard.h>
#include <kernel/TTY.h>
#include <string.h>
#define BEL 0x07
#define BS 0x08
#define HT 0x09
#define LF 0x0A
#define FF 0x0C
#define CR 0x0D
#define ESC 0x1B
#define CSI '['
template<typename T> inline constexpr T max(T a, T b) { return a > b ? a : b; }
template<typename T> inline constexpr T min(T a, T b) { return a < b ? a : b; }
template<typename T> inline constexpr T clamp(T x, T a, T b) { return x < a ? a : x > b ? b : x; }
static TTY* s_tty = nullptr;
TTY::TTY(TerminalDriver* driver)
: m_terminal_driver(driver)
{
m_width = m_terminal_driver->width();
m_height = m_terminal_driver->height();
m_buffer = new Cell[m_width * m_height];
if (s_tty == nullptr)
s_tty = this;
}
void TTY::clear()
{
for (uint32_t i = 0; i < m_width * m_height; i++)
m_buffer[i] = { .foreground = m_foreground, .background = m_background, .character = ' ' };
m_terminal_driver->clear(m_background);
}
void TTY::set_cursor_position(uint32_t x, uint32_t y)
{
static uint32_t last_x = -1;
static uint32_t last_y = -1;
if (last_x != uint32_t(-1) && last_y != uint32_t(-1))
render_from_buffer(last_x, last_y); // Hacky way to clear previous cursor in graphics mode :D
m_terminal_driver->set_cursor_position(x, y);
last_x = m_column = x;
last_y = m_row = y;
}
void TTY::set_font(const Kernel::Font& font)
{
m_terminal_driver->set_font(font);
uint32_t new_width = m_terminal_driver->width();
uint32_t new_height = m_terminal_driver->height();
if (m_width != new_width || m_height != new_height)
{
Cell* new_buffer = new Cell[new_width * new_height];
ASSERT(new_buffer);
for (uint32_t i = 0; i < new_width * m_height; i++)
new_buffer[i] = { .foreground = m_foreground, .background = m_background, .character = ' ' };
for (uint32_t y = 0; y < BAN::Math::min<uint32_t>(m_height, new_height); y++)
for (uint32_t x = 0; x < BAN::Math::min<uint32_t>(m_width, new_width); x++)
new_buffer[y * new_width + x] = m_buffer[y * m_width + x];
delete[] m_buffer;
m_buffer = new_buffer;
m_width = new_width;
m_height = new_height;
}
for (uint32_t y = 0; y < m_height; y++)
for (uint32_t x = 0; x < m_width; x++)
render_from_buffer(x, y);
}
static uint16_t handle_unicode(uint8_t ch)
{
static uint8_t unicode_left = 0;
static uint16_t codepoint = 0;
if (unicode_left)
{
if ((ch >> 6) == 0b10)
{
codepoint = (codepoint << 6) | ch;
unicode_left--;
if (unicode_left > 0)
return 0xFFFF;
return codepoint;
}
else
{
// invalid utf-8
unicode_left = 0;
return 0x00;
}
}
else
{
if ((ch >> 3) == 0b11110)
{
unicode_left = 3;
codepoint = ch & 0b00000111;
return 0xFFFF;
}
if ((ch >> 4) == 0b1110)
{
unicode_left = 2;
codepoint = ch & 0b00001111;
return 0xFFFF;
}
if ((ch >> 5) == 0b110)
{
unicode_left = 1;
codepoint = ch & 0b00011111;
return 0xFFFF;
}
}
return ch & 0x7F;
}
void TTY::reset_ansi_escape()
{
m_ansi_state.mode = '\0';
m_ansi_state.index = 0;
m_ansi_state.nums[0] = -1;
m_ansi_state.nums[1] = -1;
}
void TTY::handle_ansi_sgr()
{
switch (m_ansi_state.nums[0])
{
case -1:
case 0:
m_foreground = TerminalColor::BRIGHT_WHITE;
m_background = TerminalColor::BLACK;
break;
case 30: m_foreground = TerminalColor::BRIGHT_BLACK; break;
case 31: m_foreground = TerminalColor::BRIGHT_RED; break;
case 32: m_foreground = TerminalColor::BRIGHT_GREEN; break;
case 33: m_foreground = TerminalColor::BRIGHT_YELLOW; break;
case 34: m_foreground = TerminalColor::BRIGHT_BLUE; break;
case 35: m_foreground = TerminalColor::BRIGHT_MAGENTA; break;
case 36: m_foreground = TerminalColor::BRIGHT_CYAN; break;
case 37: m_foreground = TerminalColor::BRIGHT_WHITE; break;
case 40: m_background = TerminalColor::BRIGHT_BLACK; break;
case 41: m_background = TerminalColor::BRIGHT_RED; break;
case 42: m_background = TerminalColor::BRIGHT_GREEN; break;
case 43: m_background = TerminalColor::BRIGHT_YELLOW; break;
case 44: m_background = TerminalColor::BRIGHT_BLUE; break;
case 45: m_background = TerminalColor::BRIGHT_MAGENTA; break;
case 46: m_background = TerminalColor::BRIGHT_CYAN; break;
case 47: m_background = TerminalColor::BRIGHT_WHITE; break;
}
}
void TTY::handle_ansi_escape(uint16_t ch)
{
switch (m_ansi_state.mode)
{
case '\1':
{
if (ch == CSI)
{
m_ansi_state.mode = CSI;
return;
}
return reset_ansi_escape();
}
case CSI:
{
switch (ch)
{
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
{
int32_t& val = m_ansi_state.nums[m_ansi_state.index];
val = (val == -1) ? (ch - '0') : (val * 10 + ch - '0');
return;
}
case ';':
m_ansi_state.index++;
return;
case 'A': // Cursor Up
if (m_ansi_state.nums[0] == -1)
m_ansi_state.nums[0] = 1;
m_row = max<int32_t>(m_row - m_ansi_state.nums[0], 0);
return reset_ansi_escape();
case 'B': // Curson Down
if (m_ansi_state.nums[0] == -1)
m_ansi_state.nums[0] = 1;
m_row = min<int32_t>(m_row + m_ansi_state.nums[0], m_height - 1);
return reset_ansi_escape();
case 'C': // Cursor Forward
if (m_ansi_state.nums[0] == -1)
m_ansi_state.nums[0] = 1;
m_column = min<int32_t>(m_column + m_ansi_state.nums[0], m_width - 1);
return reset_ansi_escape();
case 'D': // Cursor Back
if (m_ansi_state.nums[0] == -1)
m_ansi_state.nums[0] = 1;
m_column = max<int32_t>(m_column - m_ansi_state.nums[0], 0);
return reset_ansi_escape();
case 'E': // Cursor Next Line
if (m_ansi_state.nums[0] == -1)
m_ansi_state.nums[0] = 1;
m_row = min<int32_t>(m_row + m_ansi_state.nums[0], m_height - 1);
m_column = 0;
return reset_ansi_escape();
case 'F': // Cursor Previous Line
if (m_ansi_state.nums[0] == -1)
m_ansi_state.nums[0] = 1;
m_row = max<int32_t>(m_row - m_ansi_state.nums[0], 0);
m_column = 0;
return reset_ansi_escape();
case 'G': // Cursor Horizontal Absolute
if (m_ansi_state.nums[0] == -1)
m_ansi_state.nums[0] = 1;
m_column = clamp<int32_t>(m_ansi_state.nums[0] - 1, 0, m_width - 1);
return reset_ansi_escape();
case 'H': // Cursor Position
if (m_ansi_state.nums[0] == -1)
m_ansi_state.nums[0] = 1;
if (m_ansi_state.nums[1] == -1)
m_ansi_state.nums[1] = 1;
m_row = clamp<int32_t>(m_ansi_state.nums[0] - 1, 0, m_height - 1);
m_column = clamp<int32_t>(m_ansi_state.nums[1] - 1, 0, m_width - 1);
return reset_ansi_escape();
case 'J': // Erase in Display
dprintln("Unsupported ANSI CSI character J");
return reset_ansi_escape();
case 'K': // Erase in Line
if (m_ansi_state.nums[0] == -1 || m_ansi_state.nums[0] == 0)
for (uint32_t i = m_column; i < m_width; i++)
putchar_at(' ', i, m_row);
else
dprintln("Unsupported ANSI CSI character K");
return reset_ansi_escape();
case 'S': // Scroll Up
dprintln("Unsupported ANSI CSI character S");
return reset_ansi_escape();
case 'T': // Scroll Down
dprintln("Unsupported ANSI CSI character T");
return reset_ansi_escape();
case 'f': // Horizontal Vertical Position
dprintln("Unsupported ANSI CSI character f");
return reset_ansi_escape();
case 'm':
handle_ansi_sgr();
return reset_ansi_escape();
default:
dprintln("Unsupported ANSI CSI character {}", ch);
return reset_ansi_escape();
}
}
default:
dprintln("Unsupported ANSI mode");
return reset_ansi_escape();
}
}
void TTY::render_from_buffer(uint32_t x, uint32_t y)
{
ASSERT(x < m_width && y < m_height);
const auto& cell = m_buffer[y * m_width + x];
m_terminal_driver->putchar_at(cell.character, x, y, cell.foreground, cell.background);
}
void TTY::putchar_at(uint16_t ch, uint32_t x, uint32_t y)
{
ASSERT(x < m_width && y < m_height);
auto& cell = m_buffer[y * m_width + x];
cell.character = ch;
cell.foreground = m_foreground;
cell.background = m_background;
m_terminal_driver->putchar_at(ch, x, y, m_foreground, m_background);
}
void TTY::putchar(char ch)
{
Kernel::LockGuard guard(m_lock);
uint16_t cp = handle_unicode(ch);
if (cp == 0xFFFF)
return;
if (m_ansi_state.mode != 0)
{
handle_ansi_escape(cp);
set_cursor_position(m_column, m_row);
return;
}
// https://en.wikipedia.org/wiki/ANSI_escape_code
switch (cp)
{
case BEL: // TODO
break;
case BS:
if (m_column > 0)
m_column--;
break;
case HT:
m_column++;
while (m_column % 8)
m_column++;
break;
case LF:
m_column = 0;
m_row++;
break;
case FF:
m_row++;
break;
case CR:
m_column = 0;
break;
case ESC:
m_ansi_state.mode = '\1';
break;
default:
putchar_at(cp, m_column, m_row);
m_column++;
break;
}
if (m_column >= m_width)
{
m_column = 0;
m_row++;
}
while (m_row >= m_height)
{
memmove(m_buffer, m_buffer + m_width, m_width * (m_height - 1) * sizeof(Cell));
// Clear last line in buffer
for (uint32_t x = 0; x < m_width; x++)
m_buffer[(m_height - 1) * m_width + x] = { .foreground = m_foreground, .background = m_background, .character = ' ' };
// Render the whole buffer to the screen
for (uint32_t y = 0; y < m_height; y++)
for (uint32_t x = 0; x < m_width; x++)
render_from_buffer(x, y);
m_column = 0;
m_row--;
}
set_cursor_position(m_column, m_row);
}
void TTY::write(const char* data, size_t size)
{
for (size_t i = 0; i < size; i++)
putchar(data[i]);
}
void TTY::write_string(const char* data)
{
while (*data)
{
putchar(*data);
data++;
}
}
void TTY::putchar_current(char ch)
{
ASSERT(s_tty);
s_tty->putchar(ch);
}
bool TTY::is_initialized()
{
return s_tty != nullptr;
}

512
kernel/kernel/Terminal/TTY.cpp Normal file
View File

@ -0,0 +1,512 @@
#include <BAN/Errors.h>
#include <BAN/ScopeGuard.h>
#include <BAN/UTF8.h>
#include <kernel/Debug.h>
#include <kernel/LockGuard.h>
#include <kernel/Process.h>
#include <kernel/Terminal/TTY.h>
#include <fcntl.h>
#include <string.h>
#define BEL 0x07
#define BS 0x08
#define HT 0x09
#define LF 0x0A
#define FF 0x0C
#define CR 0x0D
#define ESC 0x1B
#define CSI '['
namespace Kernel
{
static dev_t next_tty_rdev()
{
static dev_t major = DeviceManager::get().get_next_rdev();
static dev_t minor = 1;
return makedev(major, minor++);
}
static TTY* s_tty = nullptr;
TTY::TTY(TerminalDriver* driver)
: m_terminal_driver(driver)
, m_rdev(next_tty_rdev())
, m_name(BAN::String::formatted("tty{}", minor(m_rdev)))
{
m_width = m_terminal_driver->width();
m_height = m_terminal_driver->height();
m_buffer = new Cell[m_width * m_height];
if (s_tty == nullptr)
s_tty = this;
MUST(Process::create_kernel(
[](void* tty_)
{
TTY* tty = (TTY*)tty_;
int fd = MUST(Process::current()->open("/dev/input0"sv, O_RDONLY));
while (true)
{
Input::KeyEvent event;
MUST(Process::current()->read(fd, &event, sizeof(event)));
tty->on_key(event);
}
}, this)
);
}
void TTY::on_key(Input::KeyEvent event)
{
ASSERT(!m_lock.is_locked());
LockGuard _(m_lock);
if (event.released())
return;
const char* ansi = Input::key_event_to_utf8(event);
bool flush = false;
if (event.ctrl())
{
ansi = nullptr;
switch (event.key)
{
case Input::Key::D:
flush = true;
break;
default:
break;
}
}
else
{
switch (event.key)
{
case Input::Key::Enter:
case Input::Key::NumpadEnter:
flush = true;
ansi = "\n";
break;
case Input::Key::Backspace:
if (m_output.bytes > 0)
{
// Multibyte UTF8
if ((m_output.buffer[m_output.bytes - 1] & 0xC0) == 0x80)
{
// NOTE: this should be valid UTF8 since keyboard input already 'validates' it
while ((m_output.buffer[m_output.bytes - 1] & 0xC0) == 0x80)
{
ASSERT(m_output.bytes > 0);
m_output.bytes--;
}
ansi = "\b \b";
}
// Control sequence
else if (m_output.bytes >= 2 && m_output.buffer[m_output.bytes - 2] == '\e')
{
m_output.bytes -= 2;
ansi = "\b\b \b\b";
}
// Ascii
else
{
m_output.bytes--;
ansi = "\b \b";
}
}
break;
default:
break;
}
}
if (!m_termios.canonical)
flush = true;
if (ansi != nullptr)
{
for (size_t i = 0; ansi[i]; i++)
{
if (m_termios.echo)
putchar(ansi[i]);
if (m_output.bytes == m_output.buffer.size())
{
dprintln("TTY buffer full");
continue;
}
m_output.buffer[m_output.bytes++] = ansi[i];
}
}
if (flush)
{
m_output.flush = true;
m_output.semaphore.unblock();
}
}
void TTY::clear()
{
for (uint32_t i = 0; i < m_width * m_height; i++)
m_buffer[i] = { .foreground = m_foreground, .background = m_background, .codepoint = ' ' };
m_terminal_driver->clear(m_background);
}
void TTY::set_cursor_position(uint32_t x, uint32_t y)
{
static uint32_t last_x = -1;
static uint32_t last_y = -1;
if (last_x != uint32_t(-1) && last_y != uint32_t(-1))
render_from_buffer(last_x, last_y); // Hacky way to clear previous cursor in graphics mode :D
m_terminal_driver->set_cursor_position(x, y);
last_x = m_column = x;
last_y = m_row = y;
}
void TTY::set_font(const Kernel::Font& font)
{
m_terminal_driver->set_font(font);
uint32_t new_width = m_terminal_driver->width();
uint32_t new_height = m_terminal_driver->height();
if (m_width != new_width || m_height != new_height)
{
Cell* new_buffer = new Cell[new_width * new_height];
ASSERT(new_buffer);
for (uint32_t i = 0; i < new_width * m_height; i++)
new_buffer[i] = { .foreground = m_foreground, .background = m_background, .codepoint = ' ' };
for (uint32_t y = 0; y < BAN::Math::min<uint32_t>(m_height, new_height); y++)
for (uint32_t x = 0; x < BAN::Math::min<uint32_t>(m_width, new_width); x++)
new_buffer[y * new_width + x] = m_buffer[y * m_width + x];
delete[] m_buffer;
m_buffer = new_buffer;
m_width = new_width;
m_height = new_height;
}
for (uint32_t y = 0; y < m_height; y++)
for (uint32_t x = 0; x < m_width; x++)
render_from_buffer(x, y);
}
void TTY::reset_ansi()
{
m_ansi_state.index = 0;
m_ansi_state.nums[0] = -1;
m_ansi_state.nums[1] = -1;
m_state = State::Normal;
}
void TTY::handle_ansi_csi_color()
{
switch (m_ansi_state.nums[0])
{
case -1:
case 0:
m_foreground = TerminalColor::BRIGHT_WHITE;
m_background = TerminalColor::BLACK;
break;
case 30: m_foreground = TerminalColor::BRIGHT_BLACK; break;
case 31: m_foreground = TerminalColor::BRIGHT_RED; break;
case 32: m_foreground = TerminalColor::BRIGHT_GREEN; break;
case 33: m_foreground = TerminalColor::BRIGHT_YELLOW; break;
case 34: m_foreground = TerminalColor::BRIGHT_BLUE; break;
case 35: m_foreground = TerminalColor::BRIGHT_MAGENTA; break;
case 36: m_foreground = TerminalColor::BRIGHT_CYAN; break;
case 37: m_foreground = TerminalColor::BRIGHT_WHITE; break;
case 40: m_background = TerminalColor::BRIGHT_BLACK; break;
case 41: m_background = TerminalColor::BRIGHT_RED; break;
case 42: m_background = TerminalColor::BRIGHT_GREEN; break;
case 43: m_background = TerminalColor::BRIGHT_YELLOW; break;
case 44: m_background = TerminalColor::BRIGHT_BLUE; break;
case 45: m_background = TerminalColor::BRIGHT_MAGENTA; break;
case 46: m_background = TerminalColor::BRIGHT_CYAN; break;
case 47: m_background = TerminalColor::BRIGHT_WHITE; break;
}
}
void TTY::handle_ansi_csi(uint8_t ch)
{
uint32_t old_column = m_column;
uint32_t old_row = m_row;
switch (ch)
{
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
{
int32_t& val = m_ansi_state.nums[m_ansi_state.index];
val = (val == -1) ? (ch - '0') : (val * 10 + ch - '0');
return;
}
case ';':
m_ansi_state.index++;
return;
case 'A': // Cursor Up
if (m_ansi_state.nums[0] == -1)
m_ansi_state.nums[0] = 1;
m_row = BAN::Math::max<int32_t>(m_row - m_ansi_state.nums[0], 0);
return reset_ansi();
case 'B': // Curson Down
if (m_ansi_state.nums[0] == -1)
m_ansi_state.nums[0] = 1;
m_row = BAN::Math::min<int32_t>(m_row + m_ansi_state.nums[0], m_height - 1);
return reset_ansi();
case 'C': // Cursor Forward
if (m_ansi_state.nums[0] == -1)
m_ansi_state.nums[0] = 1;
m_column = BAN::Math::min<int32_t>(m_column + m_ansi_state.nums[0], m_width - 1);
return reset_ansi();
case 'D': // Cursor Back
if (m_ansi_state.nums[0] == -1)
m_ansi_state.nums[0] = 1;
m_column = BAN::Math::max<int32_t>(m_column - m_ansi_state.nums[0], 0);
return reset_ansi();
case 'E': // Cursor Next Line
if (m_ansi_state.nums[0] == -1)
m_ansi_state.nums[0] = 1;
m_row = BAN::Math::min<int32_t>(m_row + m_ansi_state.nums[0], m_height - 1);
m_column = 0;
return reset_ansi();
case 'F': // Cursor Previous Line
if (m_ansi_state.nums[0] == -1)
m_ansi_state.nums[0] = 1;
m_row = BAN::Math::max<int32_t>(m_row - m_ansi_state.nums[0], 0);
m_column = 0;
return reset_ansi();
case 'G': // Cursor Horizontal Absolute
if (m_ansi_state.nums[0] == -1)
m_ansi_state.nums[0] = 1;
m_column = BAN::Math::clamp<int32_t>(m_ansi_state.nums[0] - 1, 0, m_width - 1);
return reset_ansi();
case 'H': // Cursor Position
if (m_ansi_state.nums[0] == -1)
m_ansi_state.nums[0] = 1;
if (m_ansi_state.nums[1] == -1)
m_ansi_state.nums[1] = 1;
m_row = BAN::Math::clamp<int32_t>(m_ansi_state.nums[0] - 1, 0, m_height - 1);
m_column = BAN::Math::clamp<int32_t>(m_ansi_state.nums[1] - 1, 0, m_width - 1);
return reset_ansi();
case 'J': // Erase in Display
dprintln("Unsupported ANSI CSI character J");
return reset_ansi();
case 'K': // Erase in Line
if (m_ansi_state.nums[0] == -1 || m_ansi_state.nums[0] == 0)
for (uint32_t i = m_column; i < m_width; i++)
putchar_at(' ', i, m_row);
else
dprintln("Unsupported ANSI CSI character K");
return reset_ansi();
case 'S': // Scroll Up
dprintln("Unsupported ANSI CSI character S");
return reset_ansi();
case 'T': // Scroll Down
dprintln("Unsupported ANSI CSI character T");
return reset_ansi();
case 'f': // Horizontal Vertical Position
dprintln("Unsupported ANSI CSI character f");
return reset_ansi();
case 'm':
handle_ansi_csi_color();
return reset_ansi();
default:
dprintln("Unsupported ANSI CSI character {}", ch);
return reset_ansi();
}
if (old_column != m_column || old_row != m_row)
set_cursor_position(m_column, m_row);
}
void TTY::render_from_buffer(uint32_t x, uint32_t y)
{
ASSERT(x < m_width && y < m_height);
const auto& cell = m_buffer[y * m_width + x];
m_terminal_driver->putchar_at(cell.codepoint, x, y, cell.foreground, cell.background);
}
void TTY::putchar_at(uint32_t codepoint, uint32_t x, uint32_t y)
{
ASSERT(x < m_width && y < m_height);
auto& cell = m_buffer[y * m_width + x];
cell.codepoint = codepoint;
cell.foreground = m_foreground;
cell.background = m_background;
m_terminal_driver->putchar_at(codepoint, x, y, m_foreground, m_background);
}
void TTY::putchar(uint8_t ch)
{
ASSERT(m_lock.is_locked());
uint32_t codepoint = ch;
switch (m_state)
{
case State::Normal:
if ((ch & 0x80) == 0)
break;
if ((ch & 0xE0) == 0xC0)
{
m_utf8_state.codepoint = ch & 0x1F;
m_utf8_state.bytes_missing = 1;
}
else if ((ch & 0xF0) == 0xE0)
{
m_utf8_state.codepoint = ch & 0x0F;
m_utf8_state.bytes_missing = 2;
}
else if ((ch & 0xF8) == 0xF0)
{
m_utf8_state.codepoint = ch & 0x07;
m_utf8_state.bytes_missing = 3;
}
else
{
dprintln("invalid utf8");
}
m_state = State::WaitingUTF8;
return;
case State::WaitingAnsiEscape:
if (ch == CSI)
m_state = State::WaitingAnsiCSI;
else
{
dprintln("unsupported byte after ansi escape {2H}", (uint8_t)ch);
reset_ansi();
}
return;
case State::WaitingAnsiCSI:
handle_ansi_csi(ch);
return;
case State::WaitingUTF8:
if ((ch & 0xC0) != 0x80)
{
dprintln("invalid utf8");
m_state = State::Normal;
return;
}
m_utf8_state.codepoint = (m_utf8_state.codepoint << 6) | (ch & 0x3F);
m_utf8_state.bytes_missing--;
if (m_utf8_state.bytes_missing)
return;
m_state = State::Normal;
codepoint = m_utf8_state.codepoint;
break;
default:
ASSERT_NOT_REACHED();
}
switch (codepoint)
{
case BEL: // TODO
break;
case BS:
if (m_column > 0)
m_column--;
break;
case HT:
m_column++;
while (m_column % 8)
m_column++;
break;
case LF:
m_column = 0;
m_row++;
break;
case FF:
m_row++;
break;
case CR:
m_column = 0;
break;
case ESC:
m_state = State::WaitingAnsiEscape;
break;;
default:
putchar_at(codepoint, m_column, m_row);
m_column++;
break;
}
if (m_column >= m_width)
{
m_column = 0;
m_row++;
}
while (m_row >= m_height)
{
memmove(m_buffer, m_buffer + m_width, m_width * (m_height - 1) * sizeof(Cell));
// Clear last line in buffer
for (uint32_t x = 0; x < m_width; x++)
m_buffer[(m_height - 1) * m_width + x] = { .foreground = m_foreground, .background = m_background, .codepoint = ' ' };
// Render the whole buffer to the screen
for (uint32_t y = 0; y < m_height; y++)
for (uint32_t x = 0; x < m_width; x++)
render_from_buffer(x, y);
m_column = 0;
m_row--;
}
set_cursor_position(m_column, m_row);
}
BAN::ErrorOr<size_t> TTY::read(size_t, void* buffer, size_t count)
{
m_lock.lock();
while (!m_output.flush)
{
m_lock.unlock();
m_output.semaphore.block();
m_lock.lock();
}
size_t to_copy = BAN::Math::min<size_t>(count, m_output.bytes);
memcpy(buffer, m_output.buffer.data(), to_copy);
memmove(m_output.buffer.data(), m_output.buffer.data() + to_copy, m_output.bytes - to_copy);
m_output.bytes -= to_copy;
if (m_output.bytes == 0)
m_output.flush = false;
m_lock.unlock();
return to_copy;
}
BAN::ErrorOr<size_t> TTY::write(size_t, const void* buffer, size_t count)
{
LockGuard _(m_lock);
for (size_t i = 0; i < count; i++)
putchar(((uint8_t*)buffer)[i]);
return count;
}
void TTY::putchar_current(uint8_t ch)
{
ASSERT(s_tty);
LockGuard _(s_tty->m_lock);
s_tty->putchar(ch);
}
bool TTY::is_initialized()
{
return s_tty != nullptr;
}
}

2
kernel/kernel/VesaTerminalDriver.cpp → kernel/kernel/Terminal/VesaTerminalDriver.cpp
View File

@ -2,7 +2,7 @@
#include <kernel/Debug.h>
#include <kernel/MMU.h>
#include <kernel/multiboot.h>
#include <kernel/VesaTerminalDriver.h>
#include <kernel/Terminal/VesaTerminalDriver.h>
VesaTerminalDriver* VesaTerminalDriver::create()
{

38
kernel/kernel/kernel.cpp
View File

@ -19,8 +19,8 @@
#include <kernel/Serial.h>
#include <kernel/Shell.h>
#include <kernel/Syscall.h>
#include <kernel/TTY.h>
#include <kernel/VesaTerminalDriver.h>
#include <kernel/Terminal/TTY.h>
#include <kernel/Terminal/VesaTerminalDriver.h>
extern "C" const char g_kernel_cmdline[];
@ -142,8 +142,6 @@ extern "C" void kernel_main()
TerminalDriver* terminal_driver = VesaTerminalDriver::create();
ASSERT(terminal_driver);
dprintln("VESA initialized");
TTY* tty1 = new TTY(terminal_driver);
ASSERT(tty1);
MUST(ACPI::initialize());
dprintln("ACPI initialized");
@ -200,19 +198,17 @@ extern "C" void kernel_main()
}
))));
#else
MUST(scheduler.add_thread(MUST(Thread::create(init2, tty1))));
MUST(scheduler.add_thread(MUST(Thread::create(init2, terminal_driver))));
#endif
scheduler.start();
ASSERT(false);
}
static void init2(void* tty1_ptr)
static void init2(void* terminal_driver)
{
using namespace Kernel;
using namespace Kernel::Input;
TTY* tty1 = (TTY*)tty1_ptr;
DeviceManager::initialize();
MUST(VirtualFileSystem::initialize(cmdline.root));
@ -220,12 +216,32 @@ static void init2(void* tty1_ptr)
if (auto res = PS2Controller::initialize(); res.is_error())
dprintln("{}", res.error());
TTY* tty1 = new TTY((TerminalDriver*)terminal_driver);
ASSERT(tty1);
DeviceManager::get().add_device(tty1);
MUST(Process::create_kernel(
[](void* tty1)
[](void*)
{
Shell* shell = new Shell((TTY*)tty1);
int fd = MUST(Process::current()->open("/dev/tty1", 1));
while (true)
{
char buffer[1024];
int n_read = MUST(Process::current()->read(fd, buffer, sizeof(buffer)));
MUST(Process::current()->write(fd, buffer, n_read));
dprintln("{} bytes", n_read);
}
}, nullptr
));
return;
MUST(Process::create_kernel(
[](void*)
{
Shell* shell = new Shell();
ASSERT(shell);
shell->run();
}, tty1
}, nullptr
));
}