[mirror_edk2.git] / StdLib / Include / Ia32 / machine / asm.h

/*	$NetBSD: asm.h,v 1.30 2006/01/20 22:02:40 christos Exp $	*/\r
\r
/*-\r
 * Copyright (c) 1990 The Regents of the University of California.\r
 * All rights reserved.\r
 *\r
 * This code is derived from software contributed to Berkeley by\r
 * William Jolitz.\r
 *\r
 * Redistribution and use in source and binary forms, with or without\r
 * modification, are permitted provided that the following conditions\r
 * are met:\r
 * 1. Redistributions of source code must retain the above copyright\r
 *    notice, this list of conditions and the following disclaimer.\r
 * 2. Redistributions in binary form must reproduce the above copyright\r
 *    notice, this list of conditions and the following disclaimer in the\r
 *    documentation and/or other materials provided with the distribution.\r
 * 3. Neither the name of the University nor the names of its contributors\r
 *    may be used to endorse or promote products derived from this software\r
 *    without specific prior written permission.\r
 *\r
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r
 * SUCH DAMAGE.\r
 *\r
 *	@(#)asm.h	5.5 (Berkeley) 5/7/91\r
 */\r
\r
#ifndef _I386_ASM_H_\r
#define _I386_ASM_H_\r
\r
#ifdef _KERNEL_OPT\r
#include "opt_multiprocessor.h"\r
#endif\r
\r
#ifdef PIC\r
#define PIC_PROLOGUE	\\r
	pushl	%ebx;	\\r
	call	1f;	\\r
1:			\\r
	popl	%ebx;	\\r
	addl	$_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx\r
#define PIC_EPILOGUE	\\r
	popl	%ebx\r
#define PIC_PLT(x)	x@PLT\r
#define PIC_GOT(x)	x@GOT(%ebx)\r
#define PIC_GOTOFF(x)	x@GOTOFF(%ebx)\r
#else\r
#define PIC_PROLOGUE\r
#define PIC_EPILOGUE\r
#define PIC_PLT(x)	x\r
#define PIC_GOT(x)	x\r
#define PIC_GOTOFF(x)	x\r
#endif\r
\r
#ifdef __ELF__\r
# define _C_LABEL(x)	x\r
#else\r
# ifdef __STDC__\r
#  define _C_LABEL(x)	_ ## x\r
# else\r
#  define _C_LABEL(x)	_/**/x\r
# endif\r
#endif\r
#define	_ASM_LABEL(x)	x\r
\r
#define CVAROFF(x, y)		_C_LABEL(x) + y\r
\r
#ifdef __STDC__\r
# define __CONCAT(x,y)	x ## y\r
# define __STRING(x)	#x\r
#else\r
# define __CONCAT(x,y)	x/**/y\r
# define __STRING(x)	"x"\r
#endif\r
\r
/* let kernels and others override entrypoint alignment */\r
#if !defined(_ALIGN_TEXT) && !defined(_KERNEL)\r
# ifdef __ELF__\r
#  define _ALIGN_TEXT .align 4\r
# else\r
#  define _ALIGN_TEXT .align 2\r
# endif\r
#endif\r
\r
#define _ENTRY(x) \\r
	.text; _ALIGN_TEXT; .globl x; .type x,@function; x:\r
\r
#ifdef _KERNEL\r
\r
#if defined(MULTIPROCESSOR)\r
#define CPUVAR(off) %fs:__CONCAT(CPU_INFO_,off)\r
#else\r
#define CPUVAR(off) _C_LABEL(cpu_info_primary)+__CONCAT(CPU_INFO_,off)\r
#endif /* MULTIPROCESSOR */\r
\r
/* XXX Can't use __CONCAT() here, as it would be evaluated incorrectly. */\r
#ifdef __ELF__\r
#ifdef __STDC__\r
#define	IDTVEC(name) \\r
	ALIGN_TEXT; .globl X ## name; .type X ## name,@function; X ## name:\r
#else \r
#define	IDTVEC(name) \\r
	ALIGN_TEXT; .globl X/**/name; .type X/**/name,@function; X/**/name:\r
#endif /* __STDC__ */ \r
#else \r
#ifdef __STDC__\r
#define	IDTVEC(name) \\r
	ALIGN_TEXT; .globl _X ## name; .type _X ## name,@function; _X ## name: \r
#else\r
#define	IDTVEC(name) \\r
	ALIGN_TEXT; .globl _X/**/name; .type _X/**/name,@function; _X/**/name:\r
#endif /* __STDC__ */\r
#endif /* __ELF__ */\r
\r
#ifdef __ELF__\r
#define ALIGN_DATA	.align	4\r
#define ALIGN_TEXT	.align	4,0x90  /* 4-byte boundaries, NOP-filled */\r
#define SUPERALIGN_TEXT	.align	16,0x90 /* 16-byte boundaries better for 486 */\r
#else\r
#define ALIGN_DATA	.align	2\r
#define ALIGN_TEXT	.align	2,0x90  /* 4-byte boundaries, NOP-filled */\r
#define SUPERALIGN_TEXT	.align	4,0x90  /* 16-byte boundaries better for 486 */\r
#endif /* __ELF__ */\r
\r
#define _ALIGN_TEXT ALIGN_TEXT\r
\r
#ifdef GPROF\r
#ifdef __ELF__\r
#define	MCOUNT_ASM	call	_C_LABEL(__mcount)\r
#else /* __ELF__ */\r
#define	MCOUNT_ASM	call	_C_LABEL(mcount)\r
#endif /* __ELF__ */\r
#else /* GPROF */\r
#define	MCOUNT_ASM	/* nothing */\r
#endif /* GPROF */\r
\r
#endif /* _KERNEL */\r
\r
\r
\r
#ifdef GPROF\r
# ifdef __ELF__\r
#  define _PROF_PROLOGUE	\\r
	pushl %ebp; movl %esp,%ebp; call PIC_PLT(__mcount); popl %ebp\r
# else \r
#  define _PROF_PROLOGUE	\\r
	pushl %ebp; movl %esp,%ebp; call PIC_PLT(mcount); popl %ebp\r
# endif\r
#else\r
# define _PROF_PROLOGUE\r
#endif\r
\r
#define	ENTRY(y)	_ENTRY(_C_LABEL(y)); _PROF_PROLOGUE\r
#define	NENTRY(y)	_ENTRY(_C_LABEL(y))\r
#define	ASENTRY(y)	_ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE\r
\r
#define	ASMSTR		.asciz\r
\r
#ifdef __ELF__\r
#define RCSID(x)	.section ".ident"; .asciz x\r
#else\r
#define RCSID(x)	.text; .asciz x\r
#endif\r
\r
#ifdef NO_KERNEL_RCSIDS\r
#define	__KERNEL_RCSID(_n, _s)	/* nothing */\r
#else\r
#define	__KERNEL_RCSID(_n, _s)	RCSID(_s)\r
#endif\r
\r
#ifdef __ELF__\r
#define	WEAK_ALIAS(alias,sym)						\\r
	.weak alias;							\\r
	alias = sym\r
#endif\r
/*\r
 * STRONG_ALIAS: create a strong alias.\r
 */\r
#define STRONG_ALIAS(alias,sym)						\\r
	.globl alias;							\\r
	alias = sym\r
\r
#ifdef __STDC__\r
#define	WARN_REFERENCES(sym,msg)					\\r
	.stabs msg ## ,30,0,0,0 ;					\\r
	.stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0\r
#elif defined(__ELF__)\r
#define	WARN_REFERENCES(sym,msg)					\\r
	.stabs msg,30,0,0,0 ;						\\r
	.stabs __STRING(sym),1,0,0,0\r
#else\r
#define	WARN_REFERENCES(sym,msg)					\\r
	.stabs msg,30,0,0,0 ;						\\r
	.stabs __STRING(_/**/sym),1,0,0,0\r
#endif /* __STDC__ */\r
\r
\r
\r
#endif /* !_I386_ASM_H_ */\r
Commit	Line	Data
2aa62f2b	1	/* $NetBSD: asm.h,v 1.30 2006/01/20 22:02:40 christos Exp $ */\r
	2	\r
	3	/*-\r
	4	* Copyright (c) 1990 The Regents of the University of California.\r
	5	* All rights reserved.\r
	6	*\r
	7	* This code is derived from software contributed to Berkeley by\r
	8	* William Jolitz.\r
	9	*\r
	10	* Redistribution and use in source and binary forms, with or without\r
	11	* modification, are permitted provided that the following conditions\r
	12	* are met:\r
	13	* 1. Redistributions of source code must retain the above copyright\r
	14	* notice, this list of conditions and the following disclaimer.\r
	15	* 2. Redistributions in binary form must reproduce the above copyright\r
	16	* notice, this list of conditions and the following disclaimer in the\r
	17	* documentation and/or other materials provided with the distribution.\r
	18	* 3. Neither the name of the University nor the names of its contributors\r
	19	* may be used to endorse or promote products derived from this software\r
	20	* without specific prior written permission.\r
	21	*\r
	22	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r
	23	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
	24	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
	25	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r
	26	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r
	27	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r
	28	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
	29	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
	30	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r
	31	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r
	32	* SUCH DAMAGE.\r
	33	*\r
	34	* @(#)asm.h 5.5 (Berkeley) 5/7/91\r
	35	*/\r
	36	\r
	37	#ifndef _I386_ASM_H_\r
	38	#define _I386_ASM_H_\r
	39	\r
	40	#ifdef _KERNEL_OPT\r
	41	#include "opt_multiprocessor.h"\r
	42	#endif\r
	43	\r
	44	#ifdef PIC\r
	45	#define PIC_PROLOGUE \\r
	46	pushl %ebx; \\r
	47	call 1f; \\r
	48	1: \\r
	49	popl %ebx; \\r
	50	addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx\r
	51	#define PIC_EPILOGUE \\r
	52	popl %ebx\r
	53	#define PIC_PLT(x) x@PLT\r
	54	#define PIC_GOT(x) x@GOT(%ebx)\r
	55	#define PIC_GOTOFF(x) x@GOTOFF(%ebx)\r
	56	#else\r
	57	#define PIC_PROLOGUE\r
	58	#define PIC_EPILOGUE\r
	59	#define PIC_PLT(x) x\r
	60	#define PIC_GOT(x) x\r
	61	#define PIC_GOTOFF(x) x\r
	62	#endif\r
	63	\r
	64	#ifdef __ELF__\r
65	# define _C_LABEL(x) x\r
66	#else\r
67	# ifdef __STDC__\r
68	# define _C_LABEL(x) _ ## x\r
69	# else\r
70	# define _C_LABEL(x) _/**/x\r
71	# endif\r
72	#endif\r
73	#define _ASM_LABEL(x) x\r
74	\r
75	#define CVAROFF(x, y) _C_LABEL(x) + y\r
76	\r
77	#ifdef __STDC__\r
78	# define __CONCAT(x,y) x ## y\r
79	# define __STRING(x) #x\r
80	#else\r
81	# define __CONCAT(x,y) x/**/y\r
82	# define __STRING(x) "x"\r
83	#endif\r
84	\r
85	/* let kernels and others override entrypoint alignment */\r
86	#if !defined(_ALIGN_TEXT) && !defined(_KERNEL)\r
87	# ifdef __ELF__\r
88	# define _ALIGN_TEXT .align 4\r
89	# else\r
90	# define _ALIGN_TEXT .align 2\r
91	# endif\r
92	#endif\r
93	\r
94	#define _ENTRY(x) \\r
95	.text; _ALIGN_TEXT; .globl x; .type x,@function; x:\r
96	\r
97	#ifdef _KERNEL\r
98	\r
99	#if defined(MULTIPROCESSOR)\r
100	#define CPUVAR(off) %fs:__CONCAT(CPU_INFO_,off)\r
101	#else\r
102	#define CPUVAR(off) _C_LABEL(cpu_info_primary)+__CONCAT(CPU_INFO_,off)\r
103	#endif /* MULTIPROCESSOR */\r
104	\r
105	/* XXX Can't use __CONCAT() here, as it would be evaluated incorrectly. */\r
106	#ifdef __ELF__\r
107	#ifdef __STDC__\r
108	#define IDTVEC(name) \\r
109	ALIGN_TEXT; .globl X ## name; .type X ## name,@function; X ## name:\r
110	#else \r
111	#define IDTVEC(name) \\r
112	ALIGN_TEXT; .globl X//name; .type X//name,@function; X/**/name:\r
113	#endif /* __STDC__ */ \r
114	#else \r
115	#ifdef __STDC__\r
116	#define IDTVEC(name) \\r
117	ALIGN_TEXT; .globl _X ## name; .type _X ## name,@function; _X ## name: \r
118	#else\r
119	#define IDTVEC(name) \\r
120	ALIGN_TEXT; .globl _X//name; .type _X//name,@function; _X/**/name:\r
121	#endif /* __STDC__ */\r
122	#endif /* __ELF__ */\r
123	\r
124	#ifdef __ELF__\r
125	#define ALIGN_DATA .align 4\r
126	#define ALIGN_TEXT .align 4,0x90 /* 4-byte boundaries, NOP-filled */\r
127	#define SUPERALIGN_TEXT .align 16,0x90 /* 16-byte boundaries better for 486 */\r
128	#else\r
129	#define ALIGN_DATA .align 2\r
130	#define ALIGN_TEXT .align 2,0x90 /* 4-byte boundaries, NOP-filled */\r
131	#define SUPERALIGN_TEXT .align 4,0x90 /* 16-byte boundaries better for 486 */\r
132	#endif /* __ELF__ */\r
133	\r
134	#define _ALIGN_TEXT ALIGN_TEXT\r
135	\r
136	#ifdef GPROF\r
137	#ifdef __ELF__\r
138	#define MCOUNT_ASM call _C_LABEL(__mcount)\r
139	#else /* __ELF__ */\r
140	#define MCOUNT_ASM call _C_LABEL(mcount)\r
141	#endif /* __ELF__ */\r
142	#else /* GPROF */\r
143	#define MCOUNT_ASM /* nothing */\r
144	#endif /* GPROF */\r
145	\r
146	#endif /* _KERNEL */\r
147	\r
148	\r
149	\r
150	#ifdef GPROF\r
151	# ifdef __ELF__\r
152	# define _PROF_PROLOGUE \\r
153	pushl %ebp; movl %esp,%ebp; call PIC_PLT(__mcount); popl %ebp\r
154	# else \r
155	# define _PROF_PROLOGUE \\r
156	pushl %ebp; movl %esp,%ebp; call PIC_PLT(mcount); popl %ebp\r
157	# endif\r
158	#else\r
159	# define _PROF_PROLOGUE\r
160	#endif\r
161	\r
162	#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE\r
163	#define NENTRY(y) _ENTRY(_C_LABEL(y))\r
164	#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE\r
165	\r
166	#define ASMSTR .asciz\r
167	\r
168	#ifdef __ELF__\r
169	#define RCSID(x) .section ".ident"; .asciz x\r
170	#else\r
171	#define RCSID(x) .text; .asciz x\r
172	#endif\r
173	\r
174	#ifdef NO_KERNEL_RCSIDS\r
175	#define __KERNEL_RCSID(_n, _s) /* nothing */\r
176	#else\r
177	#define __KERNEL_RCSID(_n, _s) RCSID(_s)\r
178	#endif\r
179	\r
180	#ifdef __ELF__\r
181	#define WEAK_ALIAS(alias,sym) \\r
182	.weak alias; \\r
183	alias = sym\r
184	#endif\r
185	/*\r
186	* STRONG_ALIAS: create a strong alias.\r
187	*/\r
188	#define STRONG_ALIAS(alias,sym) \\r
189	.globl alias; \\r
190	alias = sym\r
191	\r
192	#ifdef __STDC__\r
193	#define WARN_REFERENCES(sym,msg) \\r
194	.stabs msg ## ,30,0,0,0 ; \\r
195	.stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0\r
196	#elif defined(__ELF__)\r
197	#define WARN_REFERENCES(sym,msg) \\r
198	.stabs msg,30,0,0,0 ; \\r
199	.stabs __STRING(sym),1,0,0,0\r
200	#else\r
201	#define WARN_REFERENCES(sym,msg) \\r
202	.stabs msg,30,0,0,0 ; \\r
203	.stabs __STRING(_/**/sym),1,0,0,0\r
204	#endif /* __STDC__ */\r
205	\r
206	\r
207	\r
208	#endif /* !_I386_ASM_H_ */\r