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Kernel: Rewrite whole scheduler

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Current context saving was very hacky and dependant on compiler
behaviour that was not consistent. Now we always use iret for
context saving. This makes everything more clean.
This commit is contained in:
Bananymous
2024-03-29 18:02:12 +02:00
parent 1b65f850ee
commit 5050047cef
18 changed files with 364 additions and 364 deletions
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31
kernel/kernel/IDT.cpp
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@@ -10,7 +10,7 @@
#include <kernel/Timer/PIT.h>
#define ISR_LIST_X X(0) X(1) X(2) X(3) X(4) X(5) X(6) X(7) X(8) X(9) X(10) X(11) X(12) X(13) X(14) X(15) X(16) X(17) X(18) X(19) X(20) X(21) X(22) X(23) X(24) X(25) X(26) X(27) X(28) X(29) X(30) X(31)
#define IRQ_LIST_X X(0) X(1) X(2) X(3) X(4) X(5) X(6) X(7) X(8) X(9) X(10) X(11) X(12) X(13) X(14) X(15) X(16) X(17) X(18) X(19) X(20) X(21) X(22) X(23) X(24) X(25) X(26) X(27) X(28) X(29) X(30) X(31) X(32)
#define IRQ_LIST_X X(0) X(1) X(2) X(3) X(4) X(5) X(6) X(7) X(8) X(9) X(10) X(11) X(12) X(13) X(14) X(15) X(16) X(17) X(18) X(19) X(20) X(21) X(22) X(23) X(24) X(25) X(26) X(27) X(28) X(29) X(30) X(31)
namespace Kernel
{
@@ -173,9 +173,6 @@ namespace Kernel
if (tid)
{
Thread::current().set_return_sp(interrupt_stack->sp);
Thread::current().set_return_ip(interrupt_stack->ip);
if (isr == ISR::PageFault)
{
// Check if stack is OOB
@@ -202,9 +199,9 @@ namespace Kernel
page_fault_error.raw = error;
if (!page_fault_error.present)
{
asm volatile("sti");
Processor::set_interrupt_state(InterruptState::Enabled);
auto result = Process::current().allocate_page_for_demand_paging(regs->cr2);
asm volatile("cli");
Processor::set_interrupt_state(InterruptState::Disabled);
if (!result.is_error() && result.value())
goto done;
@@ -332,7 +329,14 @@ done:
return;
}
extern "C" void cpp_irq_handler(uint32_t irq, InterruptStack* interrupt_stack)
extern "C" void cpp_reschedule_handler(InterruptStack* interrupt_stack, InterruptRegisters* interrupt_registers)
{
Processor::enter_interrupt(interrupt_stack, interrupt_registers);
Scheduler::get().irq_reschedule();
Processor::leave_interrupt();
}
extern "C" void cpp_irq_handler(uint32_t irq)
{
if (g_paniced)
{
@@ -342,20 +346,14 @@ done:
asm volatile("cli; 1: hlt; jmp 1b");
}
if (Scheduler::current_tid())
{
Thread::current().set_return_sp(interrupt_stack->sp);
Thread::current().set_return_ip(interrupt_stack->ip);
}
ASSERT(irq != IRQ_IPI);
if (!InterruptController::get().is_in_service(irq))
dprintln("spurious irq 0x{2H}", irq);
else
{
InterruptController::get().eoi(irq);
if (irq == IRQ_IPI)
Scheduler::get().reschedule();
else if (auto* handler = s_interruptables[irq])
if (auto* handler = s_interruptables[irq])
handler->handle_irq();
else
dprintln("no handler for irq 0x{2H}", irq);
@@ -402,6 +400,7 @@ done:
IRQ_LIST_X
#undef X
extern "C" void asm_reschedule_handler();
extern "C" void syscall_asm();
IDT* IDT::create()
@@ -419,6 +418,8 @@ done:
IRQ_LIST_X
#undef X
idt->register_interrupt_handler(IRQ_VECTOR_BASE + IRQ_IPI, asm_reschedule_handler);
idt->register_syscall_handler(0x80, syscall_asm);
return idt;