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 * Instead it recognised the # instead of an @ symbols in .type directives
63 * We define a couple of macros so that assembly code will not be dependent
64 * on one or the other.
66 #define _ASM_TYPE_FUNCTION #function
67 #define _ASM_TYPE_OBJECT #object
68 #define GLOBAL(X) .globl x
70 .text; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; x: _FNSTART
71 #define _END(x) .size x, . - x; _FNEND
74 * EENTRY()/EEND() mark "extra" entry/exit points from a function.
75 * The unwind info cannot handle the concept of a nested function, or a function
76 * with multiple .fnstart directives, but some of our assembler code is written
77 * with multiple labels to allow entry at several points. The EENTRY() macro
78 * defines such an extra entry point without a new .fnstart, so that it's
79 * basically just a label that you can jump to. The EEND() macro does nothing
80 * at all, except document the exit point associated with the same-named entry.
82 #define _EENTRY(x) .globl x; .type x,_ASM_TYPE_FUNCTION; x:
83 #define _EEND(x) /* nothing */
86 # define _PROF_PROLOGUE \
87 mov ip, lr; bl __mcount
89 # define _PROF_PROLOGUE
92 #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
93 #define EENTRY(y) _EENTRY(_C_LABEL(y)); _PROF_PROLOGUE
94 #define ENTRY_NP(y) _ENTRY(_C_LABEL(y))
95 #define EENTRY_NP(y) _EENTRY(_C_LABEL(y))
96 #define END(y) _END(_C_LABEL(y))
98 #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
99 #define ASEENTRY(y) _EENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
100 #define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y))
101 #define ASEENTRY_NP(y) _EENTRY(_ASM_LABEL(y))
102 #define ASEND(y) _END(_ASM_LABEL(y))
105 #define ASMSTR .asciz
108 #define PLT_SYM(x) PIC_SYM(x, PLT)
109 #define GOT_SYM(x) PIC_SYM(x, GOT)
110 #define GOT_GET(x,got,sym) \
113 #define GOT_INIT(got,gotsym,pclabel) \
117 #define GOT_INITSYM(gotsym,pclabel) \
118 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) + (. - (pclabel+4))
121 #define PIC_SYM(x,y) x ## ( ## y ## )
123 #define PIC_SYM(x,y) x/**/(/**/y/**/)
129 #define GOT_GET(x,got,sym) \
131 #define GOT_INIT(got,gotsym,pclabel)
132 #define GOT_INITSYM(gotsym,pclabel)
133 #define PIC_SYM(x,y) x
137 #if !defined(lint) && !defined(STRIP_FBSDID)
138 #define __FBSDID(s) .ident s
140 #define __FBSDID(s) /* nothing */
144 #define WEAK_ALIAS(alias,sym) \
149 #define WARN_REFERENCES(sym,msg) \
150 .stabs msg ## ,30,0,0,0 ; \
151 .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0
153 #define WARN_REFERENCES(sym,msg) \
154 .stabs msg,30,0,0,0 ; \
155 .stabs __STRING(sym),1,0,0,0
156 #endif /* __STDC__ */
158 /* Exactly one of the __ARM_ARCH_*__ macros will be defined by the compiler. */
159 /* The _ARM_ARCH_* macros are deprecated and will be removed soon. */
160 /* This should be moved into another header so it can be used in
161 * both asm and C code. machine/asm.h cannot be included in C code. */
162 #if defined (__ARM_ARCH_7__) || defined (__ARM_ARCH_7A__)
164 #define _HAVE_ARMv7_INSTRUCTIONS 1
167 #if defined (_HAVE_ARMv7_INSTRUCTIONS) || defined (__ARM_ARCH_6__) || \
168 defined (__ARM_ARCH_6J__) || defined (__ARM_ARCH_6K__) || \
169 defined (__ARM_ARCH_6Z__) || defined (__ARM_ARCH_6ZK__)
171 #define _HAVE_ARMv6_INSTRUCTIONS 1
174 #if defined (_HAVE_ARMv6_INSTRUCTIONS) || defined (__ARM_ARCH_5TE__) || \
175 defined (__ARM_ARCH_5TEJ__) || defined (__ARM_ARCH_5E__)
177 #define _HAVE_ARMv5E_INSTRUCTIONS 1
180 #if defined (_HAVE_ARMv5E_INSTRUCTIONS) || defined (__ARM_ARCH_5__) || \
181 defined (__ARM_ARCH_5T__)
183 #define _HAVE_ARMv5_INSTRUCTIONS 1
186 #if defined (_HAVE_ARMv5_INSTRUCTIONS) || defined (__ARM_ARCH_4T__)
188 #define _HAVE_ARMv4T_INSTRUCTIONS 1
191 /* FreeBSD requires ARMv4, so this is always set. */
192 #define _HAVE_ARMv4_INSTRUCTIONS 1
194 #if defined (_HAVE_ARMv4T_INSTRUCTIONS)
196 # define RETeq bxeq lr
197 # define RETne bxne lr
198 # define RETc(c) bx##c lr
200 # define RET mov pc, lr
201 # define RETeq moveq pc, lr
202 # define RETne movne pc, lr
203 # define RETc(c) mov##c pc, lr
206 #endif /* !_MACHINE_ASM_H_ */