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48 lines
1.5 KiB
48 lines
1.5 KiB
4 years ago
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#include "exception.hpp"
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namespace exception
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{
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auto handle_debug() -> void
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{
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rflags g_rflags;
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ia32_debugctl_register debugctl;
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__vmx_vmread(VMCS_GUEST_RFLAGS, &g_rflags.flags);
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__vmx_vmread(VMCS_GUEST_DEBUGCTL, &debugctl.flags);
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// should also check: if ((g_rflags.trap_flag && (debugctl.btf && instruction.type == branching))
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if (g_rflags.trap_flag && !debugctl.btf)
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{
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vmx_exit_qualification_debug_exception pending_db;
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__vmx_vmread(VMCS_GUEST_PENDING_DEBUG_EXCEPTIONS, &pending_db.flags);
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pending_db.single_instruction = true;
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__vmx_vmwrite(VMCS_GUEST_PENDING_DEBUG_EXCEPTIONS, pending_db.flags);
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}
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vmx_interruptibility_state interrupt_state;
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__vmx_vmread(VMCS_GUEST_INTERRUPTIBILITY_STATE,
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reinterpret_cast<size_t*>(&interrupt_state.flags));
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// not going to clear blocked by NMI or
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// SMI stuff as IRETQ should unblock that...
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// im not emulating IRETQ instruction either...
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interrupt_state.blocking_by_mov_ss = false;
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interrupt_state.blocking_by_sti = false;
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__vmx_vmwrite(VMCS_GUEST_INTERRUPTIBILITY_STATE, interrupt_state.flags);
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}
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auto injection(interruption_type type, u8 vector, ecode_t error_code) -> void
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{
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vmentry_interrupt_information interrupt{};
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interrupt.interruption_type = type;
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interrupt.vector = vector;
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interrupt.valid = true;
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if (error_code.valid)
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{
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interrupt.deliver_error_code = error_code.valid;
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__vmx_vmwrite(VMCS_VMEXIT_INTERRUPTION_ERROR_CODE, error_code.valid);
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}
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__vmx_vmwrite(VMCS_CTRL_VMENTRY_INTERRUPTION_INFORMATION_FIELD, interrupt.flags);
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}
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}
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