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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. :^)
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3b986da643
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7 changed files with 61 additions and 7 deletions
28
Kernel/Devices/DebugLogDevice.cpp
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28
Kernel/Devices/DebugLogDevice.cpp
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#include <Kernel/Devices/DebugLogDevice.h>
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#include <Kernel/IO.h>
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static DebugLogDevice* s_the;
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DebugLogDevice& DebugLogDevice::the()
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{
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ASSERT(s_the);
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return *s_the;
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}
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DebugLogDevice::DebugLogDevice()
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: CharacterDevice(1, 18)
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{
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s_the = this;
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}
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DebugLogDevice::~DebugLogDevice()
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{
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}
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ssize_t DebugLogDevice::write(Process&, const byte* data, ssize_t data_size)
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{
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for (int i = 0; i < data_size; ++i)
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IO::out8(0xe9, data[i]);
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return data_size;
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}
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