objc-msg-stub-ppc.s   [plain text]


/*
 * Copyright (c) 2004, 2006 Apple Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */

/*
 * Interposing support.
 * When OBJC_ALLOW_INTERPOSING is set, calls to objc_msgSend_rtp
 * jump to the ordinary messenger via this stub. If objc_msgSend 
 * itself is interposed, dyld will find and change this stub.
 * This stub must be compiled into a separate linker module.
 */

	.data
	.picsymbol_stub
L_objc_msgSend$stub:
	.indirect_symbol _objc_msgSend
	mflr	r0
	bcl	20,31,1f
1:
	mflr	r11
	addis	r11,r11,ha16(L_objc_msgSend$lazy_ptr-1b)
	mtlr	r0
	lwz	r12,lo16(L_objc_msgSend$lazy_ptr-1b)(r11)
	mtctr	r12
	addi	r11,r11,lo16(L_objc_msgSend$lazy_ptr-1b)
	bctr

	.data
	.lazy_symbol_pointer
L_objc_msgSend$lazy_ptr:
	.indirect_symbol _objc_msgSend
	.long dyld_stub_binding_helper
	
	.text
	.align 4
	.private_extern _objc_msgSend_stub

_objc_msgSend_stub:
	b	L_objc_msgSend$stub