diff options
Diffstat (limited to 'klibc/include/arch/sparc/machine/asm.h')
| -rw-r--r-- | klibc/include/arch/sparc/machine/asm.h | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/klibc/include/arch/sparc/machine/asm.h b/klibc/include/arch/sparc/machine/asm.h new file mode 100644 index 0000000000..b622bd8cf1 --- /dev/null +++ b/klibc/include/arch/sparc/machine/asm.h @@ -0,0 +1,192 @@ +/* $NetBSD: asm.h,v 1.14 2002/07/20 08:37:30 mrg Exp $ */ + +/* + * Copyright (c) 1994 Allen Briggs + * All rights reserved. + * + * Gleaned from locore.s and sun3 asm.h which had the following copyrights: + * locore.s: + * Copyright (c) 1988 University of Utah. + * Copyright (c) 1982, 1990 The Regents of the University of California. + * sun3/include/asm.h: + * Copyright (c) 1993 Adam Glass + * Copyright (c) 1990 The Regents of the University of California. + * + * 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. + */ + +#ifndef _ASM_H_ +#define _ASM_H_ + +/* Pull in CCFSZ, CC64FSZ, and BIAS from frame.h */ +#ifndef _LOCORE +#define _LOCORE +#endif +#include <machine/frame.h> + +#ifdef __ELF__ +#define _C_LABEL(name) name +#else +#ifdef __STDC__ +#define _C_LABEL(name) _ ## name +#else +#define _C_LABEL(name) _/**/name +#endif +#endif +#define _ASM_LABEL(name) name + +#ifdef PIC +/* + * PIC_PROLOGUE() is akin to the compiler generated function prologue for + * PIC code. It leaves the address of the Global Offset Table in DEST, + * clobbering register TMP in the process. + * + * We can use two code sequences. We can read the %pc or use the call + * instruction that saves the pc in %o7. Call requires the branch unit and + * IEU1, and clobbers %o7 which needs to be restored. This instruction + * sequence takes about 4 cycles due to instruction interdependence. Reading + * the pc takes 4 cycles to dispatch and is always dispatched alone. That + * sequence takes 7 cycles. + */ +#ifdef __arch64__ +#define PIC_PROLOGUE(dest,tmp) \ + mov %o7, tmp; \ + sethi %hi(_GLOBAL_OFFSET_TABLE_-4),dest; \ + call 0f; \ + or dest,%lo(_GLOBAL_OFFSET_TABLE_+4),dest; \ +0: \ + add dest,%o7,dest; \ + mov tmp, %o7 +#else +#define PIC_PROLOGUE(dest,tmp) \ + mov %o7,tmp; 3: call 4f; nop; 4: \ + sethi %hi(_C_LABEL(_GLOBAL_OFFSET_TABLE_)-(3b-.)),dest; \ + or dest,%lo(_C_LABEL(_GLOBAL_OFFSET_TABLE_)-(3b-.)),dest; \ + add dest,%o7,dest; mov tmp,%o7 +#endif + +/* + * PICCY_SET() does the equivalent of a `set var, %dest' instruction in + * a PIC-like way, but without involving the Global Offset Table. This + * only works for VARs defined in the same file *and* in the text segment. + */ +#ifdef __arch64__ +#define PICCY_SET(var,dest,tmp) \ + 3: rd %pc, tmp; add tmp,(var-3b),dest +#else +#define PICCY_SET(var,dest,tmp) \ + mov %o7,tmp; 3: call 4f; nop; 4: \ + add %o7,(var-3b),dest; mov tmp,%o7 +#endif +#else +#define PIC_PROLOGUE(dest,tmp) +#define PICCY_OFFSET(var,dest,tmp) +#endif + +#define FTYPE(x) .type x,@function +#define OTYPE(x) .type x,@object + +#define _ENTRY(name) \ + .align 4; .globl name; .proc 1; FTYPE(name); name: + +#ifdef GPROF +/* see _MCOUNT_ENTRY in profile.h */ +#ifdef __ELF__ +#ifdef __arch64__ +#define _PROF_PROLOGUE \ + .data; .align 8; 1: .uaword 0; .uaword 0; \ + .text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call _mcount; \ + or %o0,%lo(1b),%o0; restore +#else +#define _PROF_PROLOGUE \ + .data; .align 4; 1: .long 0; \ + .text; save %sp,-96,%sp; sethi %hi(1b),%o0; call _mcount; \ + or %o0,%lo(1b),%o0; restore +#endif +#else +#ifdef __arch64__ +#define _PROF_PROLOGUE \ + .data; .align 8; 1: .uaword 0; .uaword 0; \ + .text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call mcount; \ + or %o0,%lo(1b),%o0; restore +#else +#define _PROF_PROLOGUE \ + .data; .align 4; 1: .long 0; \ + .text; save %sp,-96,%sp; sethi %hi(1b),%o0; call mcount; \ + or %o0,%lo(1b),%o0; restore +#endif +#endif +#else +#define _PROF_PROLOGUE +#endif + +#define ENTRY(name) _ENTRY(_C_LABEL(name)); _PROF_PROLOGUE +#define ENTRY_NOPROFILE(name) _ENTRY(_C_LABEL(name)) +#define ASENTRY(name) _ENTRY(_ASM_LABEL(name)); _PROF_PROLOGUE +#define FUNC(name) ASENTRY(name) +#define RODATA(name) .align 4; .text; .globl _C_LABEL(name); \ + OTYPE(_C_LABEL(name)); _C_LABEL(name): + + +#define ASMSTR .asciz + +#define RCSID(name) .asciz name + +#ifdef __ELF__ +#define WEAK_ALIAS(alias,sym) \ + .weak alias; \ + alias = sym +#endif + +/* + * WARN_REFERENCES: create a warning if the specified symbol is referenced. + */ +#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__ */ +#else +#ifdef __STDC__ +#define __STRING(x) #x +#define WARN_REFERENCES(sym,msg) \ + .stabs msg ## ,30,0,0,0 ; \ + .stabs __STRING(_ ## sym) ## ,1,0,0,0 +#else +#define __STRING(x) "x" +#define WARN_REFERENCES(sym,msg) \ + .stabs msg,30,0,0,0 ; \ + .stabs __STRING(_/**/sym),1,0,0,0 +#endif /* __STDC__ */ +#endif /* __ELF__ */ + +#endif /* _ASM_H_ */ |