diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/OvmfPkg/Library/XenHypercallLib/Ia32/hypercall.nasm | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/OvmfPkg/Library/XenHypercallLib/Ia32/hypercall.nasm')
| -rw-r--r-- | roms/edk2/OvmfPkg/Library/XenHypercallLib/Ia32/hypercall.nasm | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/roms/edk2/OvmfPkg/Library/XenHypercallLib/Ia32/hypercall.nasm b/roms/edk2/OvmfPkg/Library/XenHypercallLib/Ia32/hypercall.nasm new file mode 100644 index 000000000..e0fa71bb5 --- /dev/null +++ b/roms/edk2/OvmfPkg/Library/XenHypercallLib/Ia32/hypercall.nasm @@ -0,0 +1,25 @@ +SECTION .text
+
+; INTN
+; EFIAPI
+; __XenHypercall2 (
+; IN VOID *HypercallAddr,
+; IN OUT INTN Arg1,
+; IN OUT INTN Arg2
+; );
+global ASM_PFX(__XenHypercall2)
+ASM_PFX(__XenHypercall2):
+ ; Save only ebx, ecx is supposed to be a scratch register and needs to be
+ ; saved by the caller
+ push ebx
+ ; Copy HypercallAddr to eax
+ mov eax, [esp + 8]
+ ; Copy Arg1 to the register expected by Xen
+ mov ebx, [esp + 12]
+ ; Copy Arg2 to the register expected by Xen
+ mov ecx, [esp + 16]
+ ; Call HypercallAddr
+ call eax
+ pop ebx
+ ret
+
|