X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fgeekos%2Fsvm_lowlevel.asm;h=57ea853114d557c75b41315822896033af4a116c;hb=701de97007c8b6776998eeab78469a4304f6b871;hp=40bb8ea1ad5a8e59a2f7b8382c2fc00a76a58b1b;hpb=2e05f3b8f738466246add183c55bcb17abf33ec9;p=palacios-OLD.git

diff --git a/palacios/src/geekos/svm_lowlevel.asm b/palacios/src/geekos/svm_lowlevel.asm
index 40bb8ea..57ea853 100644
--- a/palacios/src/geekos/svm_lowlevel.asm
+++ b/palacios/src/geekos/svm_lowlevel.asm
@@ -9,6 +9,8 @@
 
 
 
+EXTERN handle_svm_exit
+
 EXPORT launch_svm
 
 
@@ -27,16 +29,63 @@ EXPORT launch_svm
 
 
 
+
+; I think its safe to say that there are some pretty serious register issues...
 launch_svm:
 	push 	ebp
 	mov	ebp, esp
 	pusha
 	
 	mov	eax, [ebp + 8]
-;	vmrun
-	db	00fh, 001h, 0d8h
+	vmrun
+;	db	00fh, 001h, 0d8h
 	popa
 	pop	ebp
 	ret
 
 %endif
+
+
+
+
+; eventual svm_launch
+;   pusha
+;   pushf
+;
+; .vmm_loop
+;	vmrun
+;	push guest GPRs
+;	call handle_svm_exit
+;	jz .vmm_loop
+;  popf
+;  popa
+;  ret
+;
+;
+;
+
+
+
+;; Need to check this..
+;; Since RAX/EAX is saved in the VMCB, we should probably just 
+;;      do our own replacement for pusha/popa that excludes [e|r]ax
+safe_svm_launch:
+	push	ebp
+	mov	ebp, esp
+	pushf
+	pusha
+
+.vmm_loop:
+	mov	eax, [ebp + 8]
+	vmrun
+	pusha
+	call 	handle_svm_exit
+	and 	eax, eax
+	popa			;; restore the guest GPRs, (DOES THIS AFFECT E/RFLAGS?)
+	jz	.vmm_loop
+
+	;; HOW DO WE GET THE RETURN VALUE OF HANDLE_SVM_EXIT BACK TO THE CALLER
+	popf
+	popa
+	pop	ebp
+	ret
\ No newline at end of file