1 /* $NetBSD: asm.h,v 1.5 2003/08/07 16:26:53 agc Exp $ */
4 * Copyright (c) 1990 The Regents of the University of California.
7 * This code is derived from software contributed to Berkeley by
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * from: @(#)asm.h 5.5 (Berkeley) 5/7/91
39 #ifndef _MACHINE_ASM_H_
40 #define _MACHINE_ASM_H_
41 #include <sys/cdefs.h>
42 #include <machine/acle-compat.h>
43 #include <machine/sysreg.h>
46 #define _ASM_LABEL(x) x
49 # define _ALIGN_TEXT .align 2
53 #define STOP_UNWINDING .cantunwind
54 #define _FNSTART .fnstart
57 #define STOP_UNWINDING
63 * gas/arm uses @ as a single comment character and thus cannot be used here.
64 * It recognises the # instead of an @ symbol in .type directives.
66 #define _ASM_TYPE_FUNCTION #function
67 #define _ASM_TYPE_OBJECT #object
69 /* XXX Is this still the right prologue for profiling? */
71 #define _PROF_PROLOGUE \
75 #define _PROF_PROLOGUE
79 * EENTRY()/EEND() mark "extra" entry/exit points from a function.
80 * LEENTRY()/LEEND() are the the same for local symbols.
81 * The unwind info cannot handle the concept of a nested function, or a function
82 * with multiple .fnstart directives, but some of our assembler code is written
83 * with multiple labels to allow entry at several points. The EENTRY() macro
84 * defines such an extra entry point without a new .fnstart, so that it's
85 * basically just a label that you can jump to. The EEND() macro does nothing
86 * at all, except document the exit point associated with the same-named entry.
88 #define GLOBAL(x) .global x
91 #define _FUNC_MODE .code 16; .thumb_func
93 #define _FUNC_MODE .code 32
96 #define _LEENTRY(x) .type x,_ASM_TYPE_FUNCTION; _FUNC_MODE; x:
97 #define _LEEND(x) /* nothing */
98 #define _EENTRY(x) GLOBAL(x); _LEENTRY(x)
99 #define _EEND(x) _LEEND(x)
101 #define _LENTRY(x) .text; _ALIGN_TEXT; _LEENTRY(x); _FNSTART
102 #define _LEND(x) .size x, . - x; _FNEND
103 #define _ENTRY(x) .text; _ALIGN_TEXT; _EENTRY(x); _FNSTART
104 #define _END(x) _LEND(x)
106 #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
107 #define EENTRY(y) _EENTRY(_C_LABEL(y));
108 #define ENTRY_NP(y) _ENTRY(_C_LABEL(y))
109 #define EENTRY_NP(y) _EENTRY(_C_LABEL(y))
110 #define END(y) _END(_C_LABEL(y))
111 #define EEND(y) _EEND(_C_LABEL(y))
112 #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
113 #define ASLENTRY(y) _LENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
114 #define ASEENTRY(y) _EENTRY(_ASM_LABEL(y));
115 #define ASLEENTRY(y) _LEENTRY(_ASM_LABEL(y));
116 #define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y))
117 #define ASLENTRY_NP(y) _LENTRY(_ASM_LABEL(y))
118 #define ASEENTRY_NP(y) _EENTRY(_ASM_LABEL(y))
119 #define ASLEENTRY_NP(y) _LEENTRY(_ASM_LABEL(y))
120 #define ASEND(y) _END(_ASM_LABEL(y))
121 #define ASLEND(y) _LEND(_ASM_LABEL(y))
122 #define ASEEND(y) _EEND(_ASM_LABEL(y))
123 #define ASLEEND(y) _LEEND(_ASM_LABEL(y))
125 #define ASMSTR .asciz
128 #define PLT_SYM(x) PIC_SYM(x, PLT)
129 #define GOT_SYM(x) PIC_SYM(x, GOT)
130 #define GOT_GET(x,got,sym) \
133 #define GOT_INIT(got,gotsym,pclabel) \
137 #define GOT_INITSYM(gotsym,pclabel) \
139 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+4)
141 #define GOT_INITSYM(gotsym,pclabel) \
143 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+8)
147 #define PIC_SYM(x,y) x ## ( ## y ## )
149 #define PIC_SYM(x,y) x/**/(/**/y/**/)
155 #define GOT_GET(x,got,sym) \
157 #define GOT_INIT(got,gotsym,pclabel)
158 #define GOT_INITSYM(gotsym,pclabel)
159 #define PIC_SYM(x,y) x
163 #if !defined(lint) && !defined(STRIP_FBSDID)
164 #define __FBSDID(s) .ident s
166 #define __FBSDID(s) /* nothing */
170 #define WEAK_ALIAS(alias,sym) \
175 #define WARN_REFERENCES(sym,msg) \
176 .stabs msg ## ,30,0,0,0 ; \
177 .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0
179 #define WARN_REFERENCES(sym,msg) \
180 .stabs msg,30,0,0,0 ; \
181 .stabs __STRING(sym),1,0,0,0
182 #endif /* __STDC__ */
184 /* Exactly one of the __ARM_ARCH_*__ macros will be defined by the compiler. */
185 /* The _ARM_ARCH_* macros are deprecated and will be removed soon. */
186 /* This should be moved into another header so it can be used in
187 * both asm and C code. machine/asm.h cannot be included in C code. */
188 #if defined (__ARM_ARCH_7__) || defined (__ARM_ARCH_7A__)
190 #define _HAVE_ARMv7_INSTRUCTIONS 1
193 #if defined (_HAVE_ARMv7_INSTRUCTIONS) || defined (__ARM_ARCH_6__) || \
194 defined (__ARM_ARCH_6J__) || defined (__ARM_ARCH_6K__) || \
195 defined (__ARM_ARCH_6Z__) || defined (__ARM_ARCH_6ZK__)
197 #define _HAVE_ARMv6_INSTRUCTIONS 1
200 #if defined (_HAVE_ARMv6_INSTRUCTIONS) || defined (__ARM_ARCH_5TE__) || \
201 defined (__ARM_ARCH_5TEJ__) || defined (__ARM_ARCH_5E__)
203 #define _HAVE_ARMv5E_INSTRUCTIONS 1
206 #if defined (_HAVE_ARMv5E_INSTRUCTIONS) || defined (__ARM_ARCH_5__) || \
207 defined (__ARM_ARCH_5T__)
209 #define _HAVE_ARMv5_INSTRUCTIONS 1
212 #if defined (_HAVE_ARMv5_INSTRUCTIONS) || defined (__ARM_ARCH_4T__)
214 #define _HAVE_ARMv4T_INSTRUCTIONS 1
217 /* FreeBSD requires ARMv4, so this is always set. */
218 #define _HAVE_ARMv4_INSTRUCTIONS 1
220 #if defined (_HAVE_ARMv4T_INSTRUCTIONS)
222 # define RETeq bxeq lr
223 # define RETne bxne lr
224 # define RETc(c) bx##c lr
226 # define RET mov pc, lr
227 # define RETeq moveq pc, lr
228 # define RETne movne pc, lr
229 # define RETc(c) mov##c pc, lr
237 #elif __ARM_ARCH == 6
238 #define ISB mcr CP15_CP15ISB
239 #define DSB mcr CP15_CP15DSB
240 #define DMB mcr CP15_CP15DMB
241 #define WFI mcr CP15_CP15WFI
243 #define ISB mcr CP15_CP15ISB
244 #define DSB mcr CP15_CP15DSB /* DSB and DMB are the */
245 #define DMB mcr CP15_CP15DSB /* same prior to v6.*/
246 /* No form of WFI available on v4, define nothing to get an error on use. */
249 #endif /* !_MACHINE_ASM_H_ */