mirror of
https://github.com/RGBCube/serenity
synced 2025-07-27 07:57:46 +00:00
Kernel+LibC: Add a DebugLogDevice that forwards everything to I/O port 0xe9.
This is then used to implement the userspace dbgprintf() in a far more efficient way than what we had before. :^)
This commit is contained in:
parent
3b986da643
commit
3817f5f619
7 changed files with 61 additions and 7 deletions
28
Kernel/Devices/DebugLogDevice.cpp
Normal file
28
Kernel/Devices/DebugLogDevice.cpp
Normal file
|
@ -0,0 +1,28 @@
|
|||
#include <Kernel/Devices/DebugLogDevice.h>
|
||||
#include <Kernel/IO.h>
|
||||
|
||||
static DebugLogDevice* s_the;
|
||||
|
||||
DebugLogDevice& DebugLogDevice::the()
|
||||
{
|
||||
ASSERT(s_the);
|
||||
return *s_the;
|
||||
}
|
||||
|
||||
DebugLogDevice::DebugLogDevice()
|
||||
: CharacterDevice(1, 18)
|
||||
{
|
||||
s_the = this;
|
||||
}
|
||||
|
||||
DebugLogDevice::~DebugLogDevice()
|
||||
{
|
||||
}
|
||||
|
||||
ssize_t DebugLogDevice::write(Process&, const byte* data, ssize_t data_size)
|
||||
{
|
||||
for (int i = 0; i < data_size; ++i)
|
||||
IO::out8(0xe9, data[i]);
|
||||
return data_size;
|
||||
}
|
||||
|
17
Kernel/Devices/DebugLogDevice.h
Normal file
17
Kernel/Devices/DebugLogDevice.h
Normal file
|
@ -0,0 +1,17 @@
|
|||
#include <Kernel/Devices/CharacterDevice.h>
|
||||
|
||||
class DebugLogDevice final : public CharacterDevice {
|
||||
public:
|
||||
DebugLogDevice();
|
||||
virtual ~DebugLogDevice() override;
|
||||
|
||||
static DebugLogDevice& the();
|
||||
|
||||
private:
|
||||
// ^CharacterDevice
|
||||
virtual ssize_t read(Process&, byte*, ssize_t) override { return 0; }
|
||||
virtual ssize_t write(Process&, const byte*, ssize_t) override;
|
||||
virtual bool can_write(Process&) const override { return true; }
|
||||
virtual bool can_read(Process&) const override { return true; }
|
||||
virtual const char* class_name() const override { return "DebugLogDevice"; }
|
||||
};
|
Loading…
Add table
Add a link
Reference in a new issue