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
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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>
44 #define _ASM_LABEL(x) x
47 # define _ALIGN_TEXT .align 0
50 #if defined(__ARM_EABI__) && !defined(_STANDALONE)
51 #define STOP_UNWINDING .cantunwind
52 #define _FNSTART .fnstart
55 #define STOP_UNWINDING
61 * gas/arm uses @ as a single comment character and thus cannot be used here.
62 * It recognises the # instead of an @ symbol in .type directives.
64 #define _ASM_TYPE_FUNCTION #function
65 #define _ASM_TYPE_OBJECT #object
67 /* XXX Is this still the right prologue for profiling? */
69 #define _PROF_PROLOGUE \
73 #define _PROF_PROLOGUE
77 * EENTRY()/EEND() mark "extra" entry/exit points from a function.
78 * LEENTRY()/LEEND() are the the same for local symbols.
79 * The unwind info cannot handle the concept of a nested function, or a function
80 * with multiple .fnstart directives, but some of our assembler code is written
81 * with multiple labels to allow entry at several points. The EENTRY() macro
82 * defines such an extra entry point without a new .fnstart, so that it's
83 * basically just a label that you can jump to. The EEND() macro does nothing
84 * at all, except document the exit point associated with the same-named entry.
86 #define GLOBAL(x) .global x
88 #define _LEENTRY(x) .type x,_ASM_TYPE_FUNCTION; x:
89 #define _LEEND(x) /* nothing */
90 #define _EENTRY(x) GLOBAL(x); _LEENTRY(x)
91 #define _EEND(x) _LEEND(x)
93 #define _LENTRY(x) .text; _ALIGN_TEXT; _LEENTRY(x); _FNSTART
94 #define _LEND(x) .size x, . - x; _FNEND
95 #define _ENTRY(x) .text; _ALIGN_TEXT; _EENTRY(x); _FNSTART
96 #define _END(x) _LEND(x)
98 #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
99 #define EENTRY(y) _EENTRY(_C_LABEL(y));
100 #define ENTRY_NP(y) _ENTRY(_C_LABEL(y))
101 #define EENTRY_NP(y) _EENTRY(_C_LABEL(y))
102 #define END(y) _END(_C_LABEL(y))
103 #define EEND(y) _EEND(_C_LABEL(y))
104 #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
105 #define ASLENTRY(y) _LENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
106 #define ASEENTRY(y) _EENTRY(_ASM_LABEL(y));
107 #define ASLEENTRY(y) _LEENTRY(_ASM_LABEL(y));
108 #define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y))
109 #define ASLENTRY_NP(y) _LENTRY(_ASM_LABEL(y))
110 #define ASEENTRY_NP(y) _EENTRY(_ASM_LABEL(y))
111 #define ASLEENTRY_NP(y) _LEENTRY(_ASM_LABEL(y))
112 #define ASEND(y) _END(_ASM_LABEL(y))
113 #define ASLEND(y) _LEND(_ASM_LABEL(y))
114 #define ASEEND(y) _EEND(_ASM_LABEL(y))
115 #define ASLEEND(y) _LEEND(_ASM_LABEL(y))
117 #define ASMSTR .asciz
120 #define PLT_SYM(x) PIC_SYM(x, PLT)
121 #define GOT_SYM(x) PIC_SYM(x, GOT)
122 #define GOT_GET(x,got,sym) \
125 #define GOT_INIT(got,gotsym,pclabel) \
127 pclabel: add got, got, pc
129 #define GOT_INITSYM(gotsym,pclabel) \
131 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+4)
133 #define GOT_INITSYM(gotsym,pclabel) \
135 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+8)
139 #define PIC_SYM(x,y) x ## ( ## y ## )
141 #define PIC_SYM(x,y) x/**/(/**/y/**/)
147 #define GOT_GET(x,got,sym) \
149 #define GOT_INIT(got,gotsym,pclabel)
150 #define GOT_INITSYM(gotsym,pclabel)
151 #define PIC_SYM(x,y) x
155 #if !defined(lint) && !defined(STRIP_FBSDID)
156 #define __FBSDID(s) .ident s
158 #define __FBSDID(s) /* nothing */
162 #define WEAK_ALIAS(alias,sym) \
167 #define WARN_REFERENCES(sym,msg) \
168 .stabs msg ## ,30,0,0,0 ; \
169 .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0
171 #define WARN_REFERENCES(sym,msg) \
172 .stabs msg,30,0,0,0 ; \
173 .stabs __STRING(sym),1,0,0,0
174 #endif /* __STDC__ */
176 /* Exactly one of the __ARM_ARCH_*__ macros will be defined by the compiler. */
177 /* The _ARM_ARCH_* macros are deprecated and will be removed soon. */
178 /* This should be moved into another header so it can be used in
179 * both asm and C code. machine/asm.h cannot be included in C code. */
180 #if defined (__ARM_ARCH_7__) || defined (__ARM_ARCH_7A__)
182 #define _HAVE_ARMv7_INSTRUCTIONS 1
185 #if defined (_HAVE_ARMv7_INSTRUCTIONS) || defined (__ARM_ARCH_6__) || \
186 defined (__ARM_ARCH_6J__) || defined (__ARM_ARCH_6K__) || \
187 defined (__ARM_ARCH_6Z__) || defined (__ARM_ARCH_6ZK__)
189 #define _HAVE_ARMv6_INSTRUCTIONS 1
192 #if defined (_HAVE_ARMv6_INSTRUCTIONS) || defined (__ARM_ARCH_5TE__) || \
193 defined (__ARM_ARCH_5TEJ__) || defined (__ARM_ARCH_5E__)
195 #define _HAVE_ARMv5E_INSTRUCTIONS 1
198 #if defined (_HAVE_ARMv5E_INSTRUCTIONS) || defined (__ARM_ARCH_5__) || \
199 defined (__ARM_ARCH_5T__)
201 #define _HAVE_ARMv5_INSTRUCTIONS 1
204 #if defined (_HAVE_ARMv5_INSTRUCTIONS) || defined (__ARM_ARCH_4T__)
206 #define _HAVE_ARMv4T_INSTRUCTIONS 1
209 /* FreeBSD requires ARMv4, so this is always set. */
210 #define _HAVE_ARMv4_INSTRUCTIONS 1
212 #if defined (_HAVE_ARMv4T_INSTRUCTIONS)
214 # define RETeq bxeq lr
215 # define RETne bxne lr
216 # define RETc(c) bx##c lr
218 # define RET mov pc, lr
219 # define RETeq moveq pc, lr
220 # define RETne movne pc, lr
221 # define RETc(c) mov##c pc, lr
224 #endif /* !_MACHINE_ASM_H_ */