[mirror_edk2.git] / OvmfPkg / XenBusDxe / Ia32 / hypercall.S

# INTN\r
# EFIAPI\r
# XenHypercall2 (\r
#   IN     VOID *HypercallAddr,\r
#   IN OUT INTN Arg1,\r
#   IN OUT INTN Arg2\r
#   );\r
ASM_GLOBAL ASM_PFX(XenHypercall2)\r
ASM_PFX(XenHypercall2):\r
  # Save only ebx, ecx is supposed to be a scratch register and needs to be\r
  # saved by the caller\r
  push %ebx\r
  # Copy HypercallAddr to eax\r
  mov 8(%esp), %eax\r
  # Copy Arg1 to the register expected by Xen\r
  mov 12(%esp), %ebx\r
  # Copy Arg2 to the register expected by Xen\r
  mov 16(%esp), %ecx\r
  # Call HypercallAddr\r
  call *%eax\r
  pop %ebx\r
  ret\r
Commit	Line	Data
abcbbb14 AP	1	# INTN\r
	2	# EFIAPI\r
	3	# XenHypercall2 (\r
	4	# IN VOID *HypercallAddr,\r
	5	# IN OUT INTN Arg1,\r
	6	# IN OUT INTN Arg2\r
	7	# );\r
	8	ASM_GLOBAL ASM_PFX(XenHypercall2)\r
	9	ASM_PFX(XenHypercall2):\r
	10	# Save only ebx, ecx is supposed to be a scratch register and needs to be\r
	11	# saved by the caller\r
	12	push %ebx\r
	13	# Copy HypercallAddr to eax\r
	14	mov 8(%esp), %eax\r
	15	# Copy Arg1 to the register expected by Xen\r
	16	mov 12(%esp), %ebx\r
	17	# Copy Arg2 to the register expected by Xen\r
	18	mov 16(%esp), %ecx\r
	19	# Call HypercallAddr\r
	20	call *%eax\r
	21	pop %ebx\r
	22	ret\r