/* $NetBSD: asm.h,v 1.18 1999/02/24 18:36:32 drochner Exp $ */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Ralph Campbell. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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. * * @(#)machAsmDefs.h 8.1 (Berkeley) 6/10/93 */ /* * machAsmDefs.h -- * * Macros used when writing assembler programs. * * Copyright (C) 1989 Digital Equipment Corporation. * Permission to use, copy, modify, and distribute this software and * its documentation for any purpose and without fee is hereby granted, * provided that the above copyright notice appears in all copies. * Digital Equipment Corporation makes no representations about the * suitability of this software for any purpose. It is provided "as is" * without express or implied warranty. * * from: Header: /sprite/src/kernel/mach/ds3100.md/RCS/machAsmDefs.h, * v 1.2 89/08/15 18:28:24 rab Exp SPRITE (DECWRL) */ #ifndef _MIPS_ASM_H #define _MIPS_ASM_H /* * Symbolic register names */ #define zero $0 /* always zero */ #define AT $at /* assembler temporary */ #define v0 $2 /* return value */ #define v1 $3 #define a0 $4 /* argument registers */ #define a1 $5 #define a2 $6 #define a3 $7 #define t0 $8 /* temp registers (not saved across subroutine calls) */ #define t1 $9 #define t2 $10 #define t3 $11 #define t4 $12 #define t5 $13 #define t6 $14 #define t7 $15 #define s0 $16 /* saved across subroutine calls (callee saved) */ #define s1 $17 #define s2 $18 #define s3 $19 #define s4 $20 #define s5 $21 #define s6 $22 #define s7 $23 #define t8 $24 /* two more temporary registers */ #define t9 $25 #define k0 $26 /* kernel temporary */ #define k1 $27 #define gp $28 /* global pointer */ #define sp $29 /* stack pointer */ #define s8 $30 /* one more callee saved */ #define ra $31 /* return address */ /* * Define -pg profile entry code. * XXX assume .set noreorder for kernel, .set reorder for user code. */ #define _KERN_MCOUNT \ .set noat; \ move $1,$31; \ jal _mcount; \ subu sp,sp,8; \ .set at #ifdef GPROF # if defined(_KERNEL) || defined(_LOCORE) # define MCOUNT _KERN_MCOUNT # else # define MCOUNT .set noreorder; _KERN_MCOUNT ; .set reorder; # endif #else #define MCOUNT #endif #ifdef __NO_LEADING_UNDERSCORES__ # define _C_LABEL(x) x #else # ifdef __STDC__ # define _C_LABEL(x) _ ## x # else # define _C_LABEL(x) _/**/x # define _END_LABEL(x) x/**/End # endif #endif #ifdef __STDC__ # define _END_LABEL(x) x ## End #else # define _END_LABEL(x) x/**/End #endif #ifdef USE_AENT #define AENT(x) \ .aent x, 0 #else #define AENT(x) #endif /* * WARN_REFERENCES: create a warning if the specified symbol is referenced * (ELF only, and thus, no leading underscores). */ #ifdef __ELF__ #ifdef __STDC__ #define WARN_REFERENCES(_sym,_msg) \ .section .gnu.warning. ## _sym ; .ascii _msg ; .text #else #define WARN_REFERENCES(_sym,_msg) \ .section .gnu.warning./**/_sym ; .ascii _msg ; .text #endif /* __STDC__ */ #endif /* __ELF__ */ /* * LEAF * A leaf routine does * - call no other function, * - never use any register that callee-saved (S0-S8), and * - not use any local stack storage. */ #define LEAF(x) \ .globl _C_LABEL(x); \ .ent _C_LABEL(x), 0; \ _C_LABEL(x): ; \ .frame sp, 0, ra; \ MCOUNT /* * LEAF_NOPROFILE * No profilable leaf routine. */ #define LEAF_NOPROFILE(x) \ .globl _C_LABEL(x); \ .ent _C_LABEL(x), 0; \ _C_LABEL(x): ; \ .frame sp, 0, ra /* * XLEAF * declare alternate entry to leaf routine */ #define XLEAF(x) \ .globl _C_LABEL(x); \ .aent _C_LABEL(x),0; \ _C_LABEL(x): /* * NESTED * A function calls other functions and needs * therefore stack space to save/restore registers. */ #define NESTED(x, fsize, retpc) \ .globl _C_LABEL(x); \ .ent _C_LABEL(x), 0; \ _C_LABEL(x): ; \ .frame sp, fsize, retpc; \ MCOUNT /* * NESTED_NOPROFILE(x) * No profilable nested routine. */ #define NESTED_NOPROFILE(x, fsize, retpc) \ .globl _C_LABEL(x); \ .ent _C_LABEL(x), 0; \ _C_LABEL(x): ; \ .frame sp, fsize, retpc /* * XNESTED * declare alternate entry point to nested routine. */ #define XNESTED(x) \ .globl _C_LABEL(x); \ .aent _C_LABEL(x),0; \ _C_LABEL(x): /* * END * Mark end of a procedure. */ #define END(x) \ .end _C_LABEL(x) /* * IMPORT -- import external symbol */ #define IMPORT(sym, size) \ .extern sym,size /* * EXPORT -- export definition of symbol */ #define EXPORT(x) \ .globl _C_LABEL(x); \ _C_LABEL(x): /* * ALIAS * Global alias for a function, or alternate entry point */ #define ALIAS(x) \ .globl _C_LABEL(x); \ _C_LABEL(x): /* * VECTOR * exception vector entrypoint */ #define VECTOR(x, regmask) \ .ent _C_LABEL(x),0; \ EXPORT(x); \ #define VECTOR_END(x) \ .end _C_LABEL(x); \ EXPORT(_END_LABEL(x)) /* * Macros to panic and printf from assembly language. */ #define PANIC(msg) \ la a0, 9f; \ jal _C_LABEL(panic); \ MSG(msg) #define PRINTF(msg) \ la a0, 9f; \ jal _C_LABEL(printf); \ MSG(msg) #define MSG(msg) \ .rdata; \ 9: .asciiz msg; \ .text #define ASMSTR(str) \ .asciiz str; \ .align 3 /* * XXX retain dialects XXX */ #define ALEAF(x) \ .globl _C_LABEL(x); \ AENT (_C_LABEL(x)) \ _C_LABEL(x): #define NLEAF(x) \ .globl _C_LABEL(x); \ .ent _C_LABEL(x), 0; \ _C_LABEL(x): ; \ .frame sp, 0, ra #define NON_LEAF(x, fsize, retpc) \ .globl _C_LABEL(x); \ .ent _C_LABEL(x), 0; \ _C_LABEL(x): ; \ .frame sp, fsize, retpc; \ MCOUNT #define NNON_LEAF(x, fsize, retpc) \ .globl _C_LABEL(x); \ .ent _C_LABEL(x), 0; \ _C_LABEL(x): ; \ .frame sp, fsize, retpc /* * standard callframe { * register_t cf_args[4]; arg0 - arg3 * register_t cf_sp; frame pointer * register_t cf_ra; return address * }; */ #define CALLFRAME_SIZ (4 * (4 + 2)) #define CALLFRAME_SP (4 * 4) #define CALLFRAME_RA (4 * 5) /* * While it would be nice to be compatible with the SGI * REG_L and REG_S macros, because they do not take parameters, it * is impossible to use them with the _MIPS_SIM_ABIX32 model. * * These macros hide the use of mips3 instructions from the * assembler to prevent the assembler from generating 64-bit style * ABI calls. */ #if !defined(_MIPS_BSD_API) || _MIPS_BSD_API == _MIPS_BSD_API_LP32 #define REG_L lw #define REG_S sw #define REG_LI li #define REG_PROLOGUE .set push #define REG_EPILOGUE .set pop #define SZREG 4 #else #define REG_L ld #define REG_S sd #define REG_LI dli #define REG_PROLOGUE .set push ; .set mips3 #define REG_EPILOGUE .set pop #define SZREG 8 #endif /* _MIPS_BSD_API */ #endif /* _MIPS_ASM_H */