Completed preliminary host and guest state structure for VMLAUNCH. Added assembly...

[palacios.git] / palacios / src / palacios / vmx_lowlevel.S

diff --git a/palacios/src/palacios/vmx_lowlevel.S b/palacios/src/palacios/vmx_lowlevel.S
new file mode 100644 (file)
index 0000000..3591463
--- /dev/null
+++ b/palacios/src/palacios/vmx_lowlevel.S
@@ -0,0 +1,116 @@
+
+#define VMX_SUCCESS         0
+#define VMX_FAIL_INVALID    1
+#define VMX_FAIL_VALID      2
+
+#define VMCS_HOST_RSP       0x00006C14
+
+#if defined(__V3_64BIT__)
+
+#define r(reg) %r##reg
+
+#define PUSHA    \
+    push %rax;   \
+    push %rbx;   \
+    push %rcx;   \
+    push %rdx;   \
+    push %rbp;   \
+    push %rdi;   \
+    push %rsi;   \
+    push %r8 ;   \
+    push %r9 ;   \
+    push %r10;   \
+    push %r11;   \
+    push %r12;   \
+    push %r13;   \
+    push %r14;   \
+    push %r15;   
+
+#define POPA     \
+    pop %r15;    \
+    pop %r14;    \
+    pop %r13;    \
+    pop %r12;    \
+    pop %r11;    \
+    pop %r10;    \
+    pop %r9 ;    \
+    pop %r8 ;    \
+    pop %rsi;    \
+    pop %rdi;    \
+    pop %rbp;    \
+    pop %rdx;    \
+    pop %rcx;    \
+    pop %rbx;    \
+    pop %rax;    
+#else
+
+#define r(reg) %e##reg
+  
+#define PUSHA    \
+    push %eax;   \
+    push %ebx;   \
+    push %ecx;   \
+    push %edx;   \
+    push %ebp;   \
+    push %edi;   \
+    push %esi;
+
+#define POPA     \
+    pop %esi;    \
+    pop %edi;    \
+    pop %ebp;    \
+    pop %edx;    \
+    pop %ecx;    \
+    pop %ebx;    \
+    pop %eax;
+
+#endif
+
+.align 8
+.globl v3_vmx_exit_handler
+v3_vmx_exit_handler:
+    PUSHA
+    call v3_vmx_handle_exit
+    POPA
+
+v3_vmx_vmresume:
+    vmresume
+    sti
+    jz .Lfail_valid
+    jc .Lfail_invalid
+    jmp .Lreturn
+
+.globl v3_vmx_vmlaunch
+v3_vmx_vmlaunch:
+    cli 
+    pushf
+    PUSHA
+
+    mov r(sp), r(ax)
+    mov $VMCS_HOST_RSP, r(bx)
+    vmwrite r(bx), r(ax)
+    jz .Lfail_valid
+    jc .Lfail_invalid
+
+    vmlaunch
+    sti
+    jz .Lfail_valid
+    jc .Lfail_invalid
+    jmp .Lreturn
+
+.Lfail_valid:
+    mov $VMX_FAIL_VALID, r(ax)
+    jmp .Lreturn
+
+.Lfail_invalid:
+    mov $VMX_FAIL_INVALID, r(ax)
+    jmp .Lreturn
+
+.Lreturn:
+    POPA
+    popf
+    ret
+
+
+
+