xref: /illumos-gate/usr/src/uts/i86pc/sys/asm_misc.h (revision 65f20420)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5ae115bc7Smrj  * Common Development and Distribution License (the "License").
6ae115bc7Smrj  * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate  *
87c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate  * and limitations under the License.
127c478bd9Sstevel@tonic-gate  *
137c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate  *
197c478bd9Sstevel@tonic-gate  * CDDL HEADER END
207c478bd9Sstevel@tonic-gate  */
217c478bd9Sstevel@tonic-gate /*
22f0f4f396Ska  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
237c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
24*65f20420SRobert Mustacchi  * Copyright 2019 Joyent, Inc.
257c478bd9Sstevel@tonic-gate  */
267c478bd9Sstevel@tonic-gate 
277c478bd9Sstevel@tonic-gate #ifndef _SYS_ASM_MISC_H
287c478bd9Sstevel@tonic-gate #define	_SYS_ASM_MISC_H
297c478bd9Sstevel@tonic-gate 
307c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
317c478bd9Sstevel@tonic-gate extern "C" {
327c478bd9Sstevel@tonic-gate #endif
337c478bd9Sstevel@tonic-gate 
34*65f20420SRobert Mustacchi #define	RET_INSTR	0xc3
35*65f20420SRobert Mustacchi #define	NOP_INSTR	0x90
36*65f20420SRobert Mustacchi #define	STI_INSTR	0xfb
37*65f20420SRobert Mustacchi #define	JMP_INSTR	0x00eb
38*65f20420SRobert Mustacchi 
397c478bd9Sstevel@tonic-gate #ifdef _ASM	/* The remainder of this file is only for assembly files */
407c478bd9Sstevel@tonic-gate 
417c478bd9Sstevel@tonic-gate /* Load reg with pointer to per-CPU structure */
427c478bd9Sstevel@tonic-gate #if defined(__amd64)
437c478bd9Sstevel@tonic-gate #define	LOADCPU(reg)			\
447c478bd9Sstevel@tonic-gate 	movq	%gs:CPU_SELF, reg;
457c478bd9Sstevel@tonic-gate #else
467c478bd9Sstevel@tonic-gate #define	LOADCPU(reg)			\
477c478bd9Sstevel@tonic-gate 	movl	%gs:CPU_SELF, reg;
487c478bd9Sstevel@tonic-gate #endif
497c478bd9Sstevel@tonic-gate 
50ae115bc7Smrj #if defined(__i386)
51ae115bc7Smrj 
52ae115bc7Smrj #define	_HOT_PATCH_PROLOG			\
53ae115bc7Smrj 	push	%ebp;				\
54ae115bc7Smrj 	mov	%esp, %ebp;			\
55ae115bc7Smrj 	push	%ebx;				\
56ae115bc7Smrj 	push	%esi;				\
57ae115bc7Smrj 	push	%edi
58ae115bc7Smrj 
59ae115bc7Smrj #define	_HOT_PATCH(srcaddr, dstaddr, size)	\
60ae115bc7Smrj 	movl	$srcaddr, %esi;			\
61ae115bc7Smrj 	movl	$dstaddr, %edi;			\
62ae115bc7Smrj 	movl	$size, %ebx;			\
63ae115bc7Smrj 0:	pushl	$1;				\
64ae115bc7Smrj 	/*CSTYLED*/				\
65ae115bc7Smrj 	movzbl	(%esi), %eax;			\
66ae115bc7Smrj 	pushl	%eax;				\
67ae115bc7Smrj 	pushl	%edi;				\
68ae115bc7Smrj 	call	hot_patch_kernel_text;		\
69ae115bc7Smrj 	addl	$12, %esp;			\
70ae115bc7Smrj 	inc	%edi;				\
71ae115bc7Smrj 	inc	%esi;				\
72ae115bc7Smrj 	dec	%ebx;				\
73ae115bc7Smrj 	test	%ebx, %ebx;			\
74ae115bc7Smrj 	jne	0b
75ae115bc7Smrj 
76ae115bc7Smrj #define	_HOT_PATCH_EPILOG			\
77ae115bc7Smrj 	pop	%edi;				\
78ae115bc7Smrj 	pop	%esi;				\
79ae115bc7Smrj 	pop	%ebx;				\
80ae115bc7Smrj 	mov	%ebp, %esp;			\
81ae115bc7Smrj 	pop	%ebp
82ae115bc7Smrj 
83ae115bc7Smrj #endif	/* __i386 */
84ae115bc7Smrj 
857c478bd9Sstevel@tonic-gate #endif /* _ASM */
867c478bd9Sstevel@tonic-gate 
877c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
887c478bd9Sstevel@tonic-gate }
897c478bd9Sstevel@tonic-gate #endif
907c478bd9Sstevel@tonic-gate 
917c478bd9Sstevel@tonic-gate #endif	/* _SYS_ASM_MISC_H */
92