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+/* $NetBSD: asm.h,v 1.5 2003/08/07 16:26:53 agc Exp $ */
+
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * William Jolitz.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _MACHINE_ASM_H_
+#define _MACHINE_ASM_H_
+#include <sys/cdefs.h>
+
+#define _C_LABEL(x) x
+#define _ASM_LABEL(x) x
+
+#ifndef _ALIGN_TEXT
+# define _ALIGN_TEXT .align 2
+#endif
+
+#ifndef _STANDALONE
+#define STOP_UNWINDING .cantunwind
+#define _FNSTART .fnstart
+#define _FNEND .fnend
+#define _SAVE(...) .save __VA_ARGS__
+#else
+#define STOP_UNWINDING
+#define _FNSTART
+#define _FNEND
+#define _SAVE(...)
+#endif
+
+/*
+ * gas/arm uses @ as a single comment character and thus cannot be used here.
+ * It recognises the # instead of an @ symbol in .type directives.
+ */
+#define _ASM_TYPE_FUNCTION #function
+#define _ASM_TYPE_OBJECT #object
+
+/*
+ * EENTRY()/EEND() mark "extra" entry/exit points from a function.
+ * LEENTRY()/LEEND() are the same for local symbols.
+ * The unwind info cannot handle the concept of a nested function, or a function
+ * with multiple .fnstart directives, but some of our assembler code is written
+ * with multiple labels to allow entry at several points. The EENTRY() macro
+ * defines such an extra entry point without a new .fnstart, so that it's
+ * basically just a label that you can jump to. The EEND() macro does nothing
+ * at all, except document the exit point associated with the same-named entry.
+ */
+#define GLOBAL(x) .global x
+
+#ifdef __thumb__
+#define _FUNC_MODE .code 16; .thumb_func
+#else
+#define _FUNC_MODE .code 32
+#endif
+
+#define _LEENTRY(x) .type x,_ASM_TYPE_FUNCTION; _FUNC_MODE; x:
+#define _LEEND(x) /* nothing */
+#define _EENTRY(x) GLOBAL(x); _LEENTRY(x)
+#define _EEND(x) _LEEND(x)
+
+#define _LENTRY(x) .text; _ALIGN_TEXT; _LEENTRY(x); _FNSTART
+#define _LEND(x) .size x, . - x; _FNEND
+#define _ENTRY(x) .text; _ALIGN_TEXT; _EENTRY(x); _FNSTART
+#define _END(x) _LEND(x)
+
+#define ENTRY(y) _ENTRY(_C_LABEL(y));
+#define EENTRY(y) _EENTRY(_C_LABEL(y));
+#define ENTRY_NP(y) _ENTRY(_C_LABEL(y))
+#define EENTRY_NP(y) _EENTRY(_C_LABEL(y))
+#define END(y) _END(_C_LABEL(y))
+#define EEND(y) _EEND(_C_LABEL(y))
+#define ASENTRY(y) _ENTRY(_ASM_LABEL(y));
+#define ASLENTRY(y) _LENTRY(_ASM_LABEL(y));
+#define ASEENTRY(y) _EENTRY(_ASM_LABEL(y));
+#define ASLEENTRY(y) _LEENTRY(_ASM_LABEL(y));
+#define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y))
+#define ASLENTRY_NP(y) _LENTRY(_ASM_LABEL(y))
+#define ASEENTRY_NP(y) _EENTRY(_ASM_LABEL(y))
+#define ASLEENTRY_NP(y) _LEENTRY(_ASM_LABEL(y))
+#define ASEND(y) _END(_ASM_LABEL(y))
+#define ASLEND(y) _LEND(_ASM_LABEL(y))
+#define ASEEND(y) _EEND(_ASM_LABEL(y))
+#define ASLEEND(y) _LEEND(_ASM_LABEL(y))
+
+#define ASMSTR .asciz
+
+#if defined(PIC)
+#define PLT_SYM(x) PIC_SYM(x, PLT)
+#define GOT_SYM(x) PIC_SYM(x, GOT)
+#define GOT_GET(x,got,sym) \
+ ldr x, sym; \
+ ldr x, [x, got]
+#define GOT_INIT(got,gotsym,pclabel) \
+ ldr got, gotsym; \
+ pclabel: add got, pc
+#ifdef __thumb__
+#define GOT_INITSYM(gotsym,pclabel) \
+ .align 2; \
+ gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+4)
+#else
+#define GOT_INITSYM(gotsym,pclabel) \
+ .align 2; \
+ gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+8)
+#endif
+
+#ifdef __STDC__
+#define PIC_SYM(x,y) x ## ( ## y ## )
+#else
+#define PIC_SYM(x,y) x/**/(/**/y/**/)
+#endif
+
+#else
+#define PLT_SYM(x) x
+#define GOT_SYM(x) x
+#define GOT_GET(x,got,sym) \
+ ldr x, sym;
+#define GOT_INIT(got,gotsym,pclabel)
+#define GOT_INITSYM(gotsym,pclabel)
+#define PIC_SYM(x,y) x
+#endif /* PIC */
+
+#undef __FBSDID
+#if !defined(lint) && !defined(STRIP_FBSDID)
+#define __FBSDID(s) .ident s
+#else
+#define __FBSDID(s) /* nothing */
+#endif
+
+#define WEAK_ALIAS(alias,sym) \
+ .weak alias; \
+ alias = sym
+
+#ifdef __STDC__
+#define WARN_REFERENCES(sym,msg) \
+ .stabs msg ## ,30,0,0,0 ; \
+ .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0
+#else
+#define WARN_REFERENCES(sym,msg) \
+ .stabs msg,30,0,0,0 ; \
+ .stabs __STRING(sym),1,0,0,0
+#endif /* __STDC__ */
+
+# define RET bx lr
+# define RETeq bxeq lr
+# define RETne bxne lr
+# define RETc(c) bx##c lr
+
+#define ISB isb
+#define DSB dsb
+#define DMB dmb
+#define WFI wfi
+
+#if defined(__ARM_ARCH_7VE__) || defined(__clang__)
+#define MSR_ELR_HYP(regnum) msr elr_hyp, lr
+#define ERET eret
+#else
+#define MSR_ELR_HYP(regnum) .word (0xe12ef300 | regnum)
+#define ERET .word 0xe160006e
+#endif
+
+
+#endif /* !_MACHINE_ASM_H_ */