Added memory ranges

[palacios.git] / palacios / src / geekos / svm_lowlevel.asm

diff --git a/palacios/src/geekos/svm_lowlevel.asm b/palacios/src/geekos/svm_lowlevel.asm
index c468c5a..57ea853 100644 (file)
--- 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
 
 
@@ -60,4 +62,30 @@ launch_svm:
 ;  ret
 ;
 ;
-;
\ No newline at end of file
+;
+
+
+
+;; 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