e5b8bced3f
As part of the migration away from obsolete binutils we want to retire GNU as. Most assembly files used on amd64 have a .S extension and are assembled with Clang's integrated assembler; rename two files in stand/i386/btx/lib to .S to use IAS as well. The generated .text is identical (the entire .o files are not, as Clang adds debug info). PR: 205250, 233094 Discussed with: imp Sponsored by: The FreeBSD Foundation
86 lines
2.1 KiB
ArmAsm
86 lines
2.1 KiB
ArmAsm
#
|
|
# Copyright (c) 1998 Robert Nordier
|
|
# All rights reserved.
|
|
#
|
|
# Redistribution and use in source and binary forms are freely
|
|
# permitted provided that the above copyright notice and this
|
|
# paragraph and the following disclaimer are duplicated in all
|
|
# such forms.
|
|
#
|
|
# This software is provided "AS IS" and without any express or
|
|
# implied warranties, including, without limitation, the implied
|
|
# warranties of merchantability and fitness for a particular
|
|
# purpose.
|
|
#
|
|
|
|
# $FreeBSD$
|
|
|
|
#
|
|
# BTX V86 interface.
|
|
#
|
|
|
|
#
|
|
# Globals.
|
|
#
|
|
.global __v86int
|
|
#
|
|
# Fields in V86 interface structure.
|
|
#
|
|
.set V86_CTL,0x0 # Control flags
|
|
.set V86_ADDR,0x4 # Int number/address
|
|
.set V86_ES,0x8 # V86 ES
|
|
.set V86_DS,0xc # V86 DS
|
|
.set V86_FS,0x10 # V86 FS
|
|
.set V86_GS,0x14 # V86 GS
|
|
.set V86_EAX,0x18 # V86 EAX
|
|
.set V86_ECX,0x1c # V86 ECX
|
|
.set V86_EDX,0x20 # V86 EDX
|
|
.set V86_EBX,0x24 # V86 EBX
|
|
.set V86_EFL,0x28 # V86 eflags
|
|
.set V86_EBP,0x2c # V86 EBP
|
|
.set V86_ESI,0x30 # V86 ESI
|
|
.set V86_EDI,0x34 # V86 EDI
|
|
#
|
|
# Other constants.
|
|
#
|
|
.set INT_V86,0x31 # Interrupt number
|
|
.set SIZ_V86,0x38 # Size of V86 structure
|
|
#
|
|
# V86 interface function.
|
|
#
|
|
__v86int: popl __v86ret # Save return address
|
|
pushl $__v86 # Push pointer
|
|
call __v86_swap # Load V86 registers
|
|
int $INT_V86 # To BTX
|
|
call __v86_swap # Load user registers
|
|
addl $0x4,%esp # Discard pointer
|
|
pushl __v86ret # Restore return address
|
|
ret # To user
|
|
#
|
|
# Swap V86 and user registers.
|
|
#
|
|
__v86_swap: xchgl %ebp,0x4(%esp,1) # Swap pointer, EBP
|
|
xchgl %eax,V86_EAX(%ebp) # Swap EAX
|
|
xchgl %ecx,V86_ECX(%ebp) # Swap ECX
|
|
xchgl %edx,V86_EDX(%ebp) # Swap EDX
|
|
xchgl %ebx,V86_EBX(%ebp) # Swap EBX
|
|
pushl %eax # Save
|
|
pushf # Put eflags
|
|
popl %eax # in EAX
|
|
xchgl %eax,V86_EFL(%ebp) # Swap
|
|
pushl %eax # Put EAX
|
|
popf # in eflags
|
|
movl 0x8(%esp,1),%eax # Load EBP
|
|
xchgl %eax,V86_EBP(%ebp) # Swap
|
|
movl %eax,0x8(%esp,1) # Save EBP
|
|
popl %eax # Restore
|
|
xchgl %esi,V86_ESI(%ebp) # Swap ESI
|
|
xchgl %edi,V86_EDI(%ebp) # Swap EDI
|
|
xchgl %ebp,0x4(%esp,1) # Swap pointer, EBP
|
|
ret # To caller
|
|
#
|
|
# V86 interface structure.
|
|
#
|
|
.comm __v86,SIZ_V86
|
|
.comm __v86ret,4
|