%include "symbol.asm"
+EXPORT DisableInts
+
+EXPORT GetGDTR
+EXPORT GetIDTR
+EXPORT GetTR
+
+EXPORT exit_test
+
+EXTERN handle_svm_exit
+
+EXPORT launch_svm
+EXPORT safe_svm_launch
+
+
+;; These need to be kept similar with the svm return values in svm.h
+SVM_HANDLER_SUCCESS equ 0x00
+SVM_HANDLER_ERROR equ 0x1
+SVM_HANDLER_HALT equ 0x2
+
[BITS 32]
+; Save and restore registers needed by SVM
+%macro Save_SVM_Registers 1
+ mov [%1], ebx
+ mov [%1 + 8], ecx
+ mov [%1 + 16], edx
+ mov [%1 + 24], esi
+ mov [%1 + 32], edi
+ mov [%1 + 40], ebp
+%endmacro
+
+
+%macro Restore_SVM_Registers 1
+ mov ebx, [%1]
+ mov ecx, [%1 + 8]
+ mov edx, [%1 + 16]
+ mov esi, [%1 + 24]
+ mov edi, [%1 + 32]
+ mov ebp, [%1 + 40]
+%endmacro
+
+%macro vmrun 0
+ db 00fh, 001h, 0d8h
+%endmacro
+
+%macro vmsave 0
+ db 00fh, 001h, 0dbh
+%endmacro
+
+%macro vmload 0
+ db 00fh, 001h, 0dah
+%endmacro
+
+;VMRUN equ db 0Fh, 01h, D8h
+;VMLOAD equ db 0x0F,0x01,0xDA
+;VMSAVE equ db 0x0F,0x01,0xDB
+;STGI equ db 0x0F,0x01,0xDC
+;CLGI equ db 0x0F,0x01,0xDD
+
+
+align 8
+DisableInts:
+ cli
+ ret
+
+
+align 8
+GetGDTR:
+ push ebp
+ mov ebp, esp
+ pusha
+ mov ebx, [ebp + 8]
+ sgdt [ebx]
+
+ popa
+ pop ebp
+ ret
+
+
+align 8
+GetIDTR:
+ push ebp
+ mov ebp, esp
+ pusha
+
+ mov ebx, [ebp + 8]
+ sidt [ebx]
+
+ popa
+ pop ebp
+ ret
+
+align 8
+GetTR:
+ push ebp
+ mov ebp, esp
+ pusha
+ mov ebx, [ebp + 8]
+ str [ebx]
+
+ popa
+ pop ebp
+ ret
+; I think its safe to say that there are some pretty serious register issues...
+align 8
+launch_svm:
+ push ebp
+ mov ebp, esp
+ pusha
+
+ mov eax, [ebp + 8]
+ vmrun
+; db 00fh, 001h, 0d8h
+ popa
+ pop ebp
+ ret
+
+
+
+
+exit_test:
+ mov cr4, eax
+ ret
+
+
+;; Need to check this..
+;; save_svm_launch(rax, struct guest_gprs * regs)
+align 8
+safe_svm_launch:
+ push ebp
+ mov ebp, esp
+ pushf
+ pusha ;; Save Host state
+
+
+ push dword [ebp + 12] ;; pointer to the guest GPR save area
+ push dword [ebp + 8] ;; pointer to the VMCB pointer
+
+ mov eax, [esp + 4] ;; mov guest GPR pointer to eax
+
+ Restore_SVM_Registers eax ;; Restore Guest GPR state
+ pop eax ;; pop VMCB pointer into eax
+
+ vmload
+ vmrun
+ vmsave
+
+ pop eax ;; pop Guest GPR pointer into eax
+ Save_SVM_Registers eax ;; save guest GPRs
+
+ popa ;; Restore Host state
+ popf
+ pop ebp
+ ret
+
+
+
+;;align 8
+;;safe_svm_launch:
+;; push ebp
+;; mov ebp, esp
+;; pushf
+;; pusha
+;;
+;.vmm_loop:
+; mov eax, [ebp + 8]
+; vmrun
+; Save_SVM_Registers
+;
+; call handle_svm_exit
+;
+; mov [ebp + 12], eax
+;
+; and eax, eax
+;
+; Restore_SVM_Registers
+;
+; jz .vmm_loop
+;
+; popa
+; popf
+; pop ebp
+; ret
+
+
%endif
+
+
