/* $NetBSD: asm.h,v 1.30 2019/01/27 04:52:07 dholland Exp $ */ /*- * Copyright (c) 2014 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Matt Thomas of 3am Software Foundry. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* * 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. * * from: @(#)asm.h 5.5 (Berkeley) 5/7/91 */ #ifndef _ARM_ASM_H_ #define _ARM_ASM_H_ #include #ifdef __thumb__ #define THUMB_INSN(n) n #else #define THUMB_INSN(n) #endif #define __BIT(n) (1 << (n)) #define __BITS(hi,lo) ((~((~0)<<((hi)+1)))&((~0)<<(lo))) #define __LOWEST_SET_BIT(__mask) ((((__mask) - 1) & (__mask)) ^ (__mask)) #define __SHIFTOUT(__x, __mask) (((__x) & (__mask)) / __LOWEST_SET_BIT(__mask)) #define __SHIFTIN(__x, __mask) ((__x) * __LOWEST_SET_BIT(__mask)) #define _C_LABEL(x) x #define _ASM_LABEL(x) x #ifdef __STDC__ # define __CONCAT(x,y) x ## y # define __STRING(x) #x #else # define __CONCAT(x,y) x/**/y # define __STRING(x) "x" #endif #ifndef _ALIGN_TEXT # define _ALIGN_TEXT .align 2 #endif #ifndef _TEXT_SECTION #define _TEXT_SECTION .text #endif #ifdef __arm__ .syntax unified /* * gas/arm uses @ as a single comment character and thus cannot be used here * Instead it recognised the # instead of an @ symbols in .type directives * We define a couple of macros so that assembly code will not be dependent * on one or the other. */ #define _ASM_TYPE_FUNCTION %function #define _ASM_TYPE_OBJECT %object #define _THUMB_ENTRY(x) \ _TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; \ .thumb_func; .code 16; x: #define _ARM_ENTRY(x) \ _TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; \ .code 32; x: #ifdef __thumb__ #define _ENTRY(x) _THUMB_ENTRY(x) #else #define _ENTRY(x) _ARM_ENTRY(x) #endif #define _END(x) .size x,.-x #ifdef GPROF # define _PROF_PROLOGUE \ mov ip, lr; bl __mcount #else # define _PROF_PROLOGUE #endif #endif #ifdef __aarch64__ #define _ASM_TYPE_FUNCTION @function #define _ASM_TYPE_OBJECT @object #define _ENTRY(x) \ _TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; x: #define _END(x) .size x,.-x #ifdef GPROF # define _PROF_PROLOGUE \ mov x9, x30; bl __mcount #else # define _PROF_PROLOGUE #endif #ifdef __PIC__ #define GOTREF(x) :got:x #define GOTLO12(x) :got_lo12:x #else #define GOTREF(x) x #define GOTLO12(x) :lo12:x #endif #endif #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE #define ENTRY_NP(y) _ENTRY(_C_LABEL(y)) #define END(y) _END(_C_LABEL(y)) #define ARM_ENTRY(y) _ARM_ENTRY(_C_LABEL(y)); _PROF_PROLOGUE #define ARM_ENTRY_NP(y) _ARM_ENTRY(_C_LABEL(y)) #define THUMB_ENTRY(y) _THUMB_ENTRY(_C_LABEL(y)); _PROF_PROLOGUE #define THUMB_ENTRY_NP(y) _THUMB_ENTRY(_C_LABEL(y)) #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE #define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y)) #define ASEND(y) _END(_ASM_LABEL(y)) #define ARM_ASENTRY(y) _ARM_ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE #define ARM_ASENTRY_NP(y) _ARM_ENTRY(_ASM_LABEL(y)) #define THUMB_ASENTRY(y) _THUMB_ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE #define THUMB_ASENTRY_NP(y) _THUMB_ENTRY(_ASM_LABEL(y)) #define ASMSTR .asciz #ifdef __PIC__ #define REL_SYM(a, b) ((a) - (b)) #define PLT_SYM(x) x #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, got, pc #ifdef __thumb__ #define GOT_INITSYM(gotsym,pclabel) \ .align 0; \ gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+4) #else #define GOT_INITSYM(gotsym,pclabel) \ .align 0; \ 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 REL_SYM(a, b) (a) #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__ */ #define RCSID(x) .pushsection ".ident"; .asciz x; .popsection #define WEAK_ALIAS(alias,sym) \ .weak alias; \ alias = sym /* * STRONG_ALIAS: create a strong alias. */ #define STRONG_ALIAS(alias,sym) \ .globl alias; \ alias = sym #ifdef __STDC__ #define WARN_REFERENCES(sym,msg) \ .pushsection .gnu.warning. ## sym; \ .ascii msg; \ .popsection #else #define WARN_REFERENCES(sym,msg) \ .pushsection .gnu.warning./**/sym; \ .ascii msg; \ .popsection #endif /* __STDC__ */ #ifdef __thumb__ # define XPUSH push # define XPOP pop # define XPOPRET pop {pc} #else # define XPUSH stmfd sp!, # define XPOP ldmfd sp!, # ifdef _ARM_ARCH_5 # define XPOPRET ldmfd sp!, {pc} # else # define XPOPRET ldmfd sp!, {lr}; mov pc, lr # endif #endif #if defined(__aarch64__) # define RET ret #elif defined (_ARM_ARCH_4T) # define RET bx lr # define RETr(r) bx r # if defined(__thumb__) # if defined(_ARM_ARCH_7) # define RETc(c) it c; __CONCAT(bx,c) lr # endif # else # define RETc(c) __CONCAT(bx,c) lr # endif #else # define RET mov pc, lr # define RETr(r) mov pc, r # define RETc(c) __CONCAT(mov,c) pc, lr #endif #ifdef _ARM_ARCH_7 #define KMODTRAMPOLINE(n) \ _ENTRY(__wrap_ ## n) \ movw ip, #:lower16:n; \ movt ip, #:upper16:n; \ bx ip #elif defined(_ARM_ARCH_4T) #define KMODTRAMPOLINE(n) \ _ENTRY(__wrap_ ## n) \ ldr ip, [pc]; \ bx ip; \ .word n #else #define KMODTRAMPOLINE(n) \ _ENTRY(__wrap_ ## n) \ ldr pc, [pc, #-4]; \ .word n #endif #endif /* !_ARM_ASM_H_ */