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Kernel: Add x86_64 support for fork()
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4 changed files with 42 additions and 35 deletions
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@ -39,6 +39,7 @@ Atomic<u32> Processor::s_idle_cpu_mask { 0 };
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extern "C" void thread_context_first_enter(void);
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extern "C" void exit_kernel_thread(void);
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extern "C" void do_assume_context(Thread* thread, u32 flags);
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// The compiler can't see the calls to these functions inside assembly.
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// Declare them, to avoid dead code warnings.
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@ -1233,4 +1234,20 @@ extern "C" FlatPtr do_init_context(Thread* thread, u32 flags)
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#endif
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return Processor::current().init_context(*thread, true);
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}
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void Processor::assume_context(Thread& thread, FlatPtr flags)
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{
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dbgln_if(CONTEXT_SWITCH_DEBUG, "Assume context for thread {} {}", VirtualAddress(&thread), thread);
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VERIFY_INTERRUPTS_DISABLED();
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Scheduler::prepare_after_exec();
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// in_critical() should be 2 here. The critical section in Process::exec
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// and then the scheduler lock
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VERIFY(Processor::current().in_critical() == 2);
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do_assume_context(&thread, flags);
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VERIFY_NOT_REACHED();
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}
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}
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