diff options
Diffstat (limited to 'OvmfPkg/XenBusDxe/X64/hypercall.asm')
-rw-r--r-- | OvmfPkg/XenBusDxe/X64/hypercall.asm | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/OvmfPkg/XenBusDxe/X64/hypercall.asm b/OvmfPkg/XenBusDxe/X64/hypercall.asm new file mode 100644 index 0000000000..5b3451473d --- /dev/null +++ b/OvmfPkg/XenBusDxe/X64/hypercall.asm @@ -0,0 +1,26 @@ +.code
+
+; INTN
+; EFIAPI
+; XenHypercall2 (
+; IN VOID *HypercallAddr,
+; IN OUT INTN Arg1,
+; IN OUT INTN Arg2
+; );
+XenHypercall2 PROC
+ push rdi
+ push rsi
+ ; Copy HypercallAddr to rax
+ mov rax, rcx
+ ; Copy Arg1 to the register expected by Xen
+ mov rdi, rdx
+ ; Copy Arg2 to the register expected by Xen
+ mov rsi, r8
+ ; Call HypercallAddr
+ call rax
+ pop rsi
+ pop rdi
+ ret
+XenHypercall2 ENDP
+
+END
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