/* $NetBSD: asm.h,v 1.32 2025/05/08 02:27:24 uwe Exp $ */ /*- * 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. * * @(#)asm.h 5.5 (Berkeley) 5/7/91 */ #ifndef _SH3_ASM_H_ #define _SH3_ASM_H_ /* * The old NetBSD/sh3 ELF toolchain used underscores. The new * NetBSD/sh3 ELF toolchain does not. The C pre-processor * defines __NO_LEADING_UNDERSCORES__ for the new ELF toolchain. */ #if defined(__ELF__) && defined(__NO_LEADING_UNDERSCORES__) # define _C_LABEL(x) x #else #ifdef __STDC__ # define _C_LABEL(x) _ ## x #else # define _C_LABEL(x) _/**/x #endif #endif #define _ASM_LABEL(x) x /* let kernels and others override entrypoint alignment */ #ifndef _ALIGN_TEXT # define _ALIGN_TEXT .align 2 #endif #ifdef __ELF__ #define _ENTRY(x) \ .text ;\ _ALIGN_TEXT ;\ .globl x ;\ .type x,@function ;\ x: #else /* !__ELF__ */ #define _ENTRY(x) \ .text ;\ _ALIGN_TEXT ;\ .globl x ;\ x: #endif /* !__ELF__ */ #ifdef GPROF #define _PROF_PROLOGUE \ mov.l 1f,r1 ; \ mova 2f,r0 ; \ jmp @r1 ; \ nop ; \ .align 2 ; \ 1: .long __mcount ; \ 2: #else /* !GPROF */ #define _PROF_PROLOGUE #endif /* !GPROF */ #define ENTRY(y) _ENTRY(_C_LABEL(y)) _PROF_PROLOGUE #define NENTRY(y) _ENTRY(_C_LABEL(y)) #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)) _PROF_PROLOGUE #define SET_ENTRY_SIZE(y) \ .size _C_LABEL(y), . - _C_LABEL(y) #define SET_ASENTRY_SIZE(y) \ .size _ASM_LABEL(y), . - _ASM_LABEL(y) #ifdef __ELF__ #define ALTENTRY(name) \ .globl _C_LABEL(name) ;\ .type _C_LABEL(name),@function ;\ _C_LABEL(name): #else #define ALTENTRY(name) \ .globl _C_LABEL(name) ;\ _C_LABEL(name): #endif /* * Hide the gory details of PIC calls vs. normal calls. Use as in the * following example: * * sts.l pr, @-sp * PIC_PROLOGUE(.L_got, r0) ! saves old r12 on stack * ... * mov.l .L_function_1, r0 * 1: CALL r0 ! each call site needs a label * nop * ... * mov.l .L_function_2, r0 * 2: CALL r0 * nop * ... * PIC_EPILOGUE ! restores r12 from stack * lds.l @sp+, pr ! so call in right order * rts * nop * * .align 2 * .L_got: * PIC_GOT_DATUM * .L_function_1: ! if you call the same function twice * CALL_DATUM(function, 1b) ! provide call datum for each call * .L_function_2: * CALL_DATUM(function, 2b) */ #ifdef __PIC__ #define PIC_PLT(x) x@PLT #define PIC_GOT(x) x@GOT #define PIC_GOTOFF(x) x@GOTOFF #define PIC_PROLOGUE(got) \ mov.l r12, @-sp; \ PIC_PROLOGUE_NOSAVE(got) /* * Functions that do non local jumps don't need to preserve r12, * so we can shave off two instructions to save/restore it. */ #define PIC_PROLOGUE_NOSAVE(got) \ mov.l got, r12; \ mova got, r0; \ add r0, r12 #define PIC_EPILOGUE \ mov.l @sp+, r12 #define PIC_EPILOGUE_SLOT \ PIC_EPILOGUE #define PIC_GOT_DATUM \ .long _GLOBAL_OFFSET_TABLE_ #define CALL bsrf #define JUMP braf #define CALL_DATUM(function, lpcs) \ .long PIC_PLT(function) - ((lpcs) + 4 - (.)) /* * This will result in text relocations in the shared library, * unless the function is local or has hidden or protected visibility. * Does not require PIC prologue. */ #define CALL_DATUM_LOCAL(function, lpcs) \ .long function - ((lpcs) + 4) #else /* !__PIC__ */ #define PIC_PROLOGUE(label) #define PIC_PROLOGUE_NOSAVE(label) #define PIC_EPILOGUE #define PIC_EPILOGUE_SLOT nop #define PIC_GOT_DATUM #define CALL jsr @ #define JUMP jmp @ #define CALL_DATUM(function, lpcs) \ .long function #define CALL_DATUM_LOCAL(function, lpcs) \ .long function #endif /* !__PIC__ */ #define ASMSTR .asciz #ifdef __ELF__ #ifdef _NETBSD_REVISIONID #define RCSID(x) .pushsection ".ident","MS",@progbits,1; \ .asciz x; \ .ascii "$"; .ascii "NetBSD: "; .ascii __FILE__; \ .ascii " "; .ascii _NETBSD_REVISIONID; \ .asciz " $"; \ .popsection #else #define RCSID(x) .pushsection ".ident","MS",@progbits,1; \ .asciz x; \ .popsection #endif #else #define RCSID(x) .text; .asciz x #endif #ifdef NO_KERNEL_RCSIDS #define __KERNEL_RCSID(_n, _s) /* nothing */ #else #define __KERNEL_RCSID(_n, _s) RCSID(_s) #endif #ifdef __ELF__ #define WEAK_ALIAS(alias,sym) \ .weak _C_LABEL(alias); \ _C_LABEL(alias) = _C_LABEL(sym) #endif /* * STRONG_ALIAS: create a strong alias. */ #define STRONG_ALIAS(alias,sym) \ .globl _C_LABEL(alias); \ _C_LABEL(alias) = _C_LABEL(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__ */ #endif /* !_SH3_ASM_H_ */
