2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
223 lines
5.9 KiB
C
223 lines
5.9 KiB
C
/* $NetBSD: asm.h,v 1.39 2010/12/20 21:11:24 joerg Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)asm.h 5.5 (Berkeley) 5/7/91
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*/
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#ifndef _I386_ASM_H_
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#define _I386_ASM_H_
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#ifdef _KERNEL_OPT
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#include "opt_multiprocessor.h"
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#endif
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#ifdef PIC
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#define PIC_PROLOGUE \
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pushl %ebx; \
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call 1f; \
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1: \
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popl %ebx; \
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addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx
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#define PIC_EPILOGUE \
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popl %ebx
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#define PIC_PLT(x) x@PLT
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#define PIC_GOT(x) x@GOT(%ebx)
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#define PIC_GOTOFF(x) x@GOTOFF(%ebx)
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#else
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#define PIC_PROLOGUE
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#define PIC_EPILOGUE
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#define PIC_PLT(x) x
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#define PIC_GOT(x) x
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#define PIC_GOTOFF(x) x
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#endif
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#ifdef __ELF__
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# define _C_LABEL(x) x
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#else
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# ifdef __STDC__
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# define _C_LABEL(x) _ ## x
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# else
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# define _C_LABEL(x) _/**/x
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# endif
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#endif
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#define _ASM_LABEL(x) x
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#define CVAROFF(x, y) _C_LABEL(x) + y
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#ifdef __STDC__
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# define __CONCAT(x,y) x ## y
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# define __STRING(x) #x
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#else
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# define __CONCAT(x,y) x/**/y
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# define __STRING(x) "x"
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#endif
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/* let kernels and others override entrypoint alignment */
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#if !defined(_ALIGN_TEXT) && !defined(_KERNEL)
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# ifdef _STANDALONE
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# define _ALIGN_TEXT .align 4
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# elif defined __ELF__
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# define _ALIGN_TEXT .align 16
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# else
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# define _ALIGN_TEXT .align 4
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# endif
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#endif
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#define _ENTRY(x) \
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.text; _ALIGN_TEXT; .globl x; .type x,@function; x:
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#define _LABEL(x) \
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.globl x; x:
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#ifdef _KERNEL
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#define CPUVAR(off) %fs:__CONCAT(CPU_INFO_,off)
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/* XXX Can't use __CONCAT() here, as it would be evaluated incorrectly. */
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#ifdef __ELF__
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#ifdef __STDC__
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#define IDTVEC(name) \
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ALIGN_TEXT; .globl X ## name; .type X ## name,@function; X ## name:
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#define IDTVEC_END(name) \
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.size X ## name, . - X ## name
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#else
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#define IDTVEC(name) \
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ALIGN_TEXT; .globl X/**/name; .type X/**/name,@function; X/**/name:
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#define IDTVEC_END(name) \
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.size X/**/name, . - X/**/name
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#endif /* __STDC__ */
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#else
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#ifdef __STDC__
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#define IDTVEC(name) \
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ALIGN_TEXT; .globl _X ## name; .type _X ## name,@function; _X ## name:
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#define IDTVEC_END(name) \
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.size _X ## name, . - _X ## name
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#else
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#define IDTVEC(name) \
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ALIGN_TEXT; .globl _X/**/name; .type _X/**/name,@function; _X/**/name:
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#define IDTVEC_END(name) \
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.size _X/**/name, . - _X/**/name
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#endif /* __STDC__ */
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#endif /* __ELF__ */
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#ifdef _STANDALONE
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#define ALIGN_DATA .align 4
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#define ALIGN_TEXT .align 4 /* 4-byte boundaries */
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#define SUPERALIGN_TEXT .align 16 /* 15-byte boundaries */
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#elif defined __ELF__
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#define ALIGN_DATA .align 4
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#define ALIGN_TEXT .align 16 /* 16-byte boundaries */
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#define SUPERALIGN_TEXT .align 16 /* 16-byte boundaries */
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#else
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#define ALIGN_DATA .align 2
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#define ALIGN_TEXT .align 4 /* 16-byte boundaries */
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#define SUPERALIGN_TEXT .align 4 /* 16-byte boundaries */
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#endif /* __ELF__ */
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#define _ALIGN_TEXT ALIGN_TEXT
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#ifdef GPROF
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#ifdef __ELF__
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#define MCOUNT_ASM call _C_LABEL(__mcount)
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#else /* __ELF__ */
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#define MCOUNT_ASM call _C_LABEL(mcount)
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#endif /* __ELF__ */
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#else /* GPROF */
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#define MCOUNT_ASM /* nothing */
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#endif /* GPROF */
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#endif /* _KERNEL */
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#ifdef GPROF
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# ifdef __ELF__
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# define _PROF_PROLOGUE \
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pushl %ebp; movl %esp,%ebp; call PIC_PLT(__mcount); popl %ebp
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# else
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# define _PROF_PROLOGUE \
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pushl %ebp; movl %esp,%ebp; call PIC_PLT(mcount); popl %ebp
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# endif
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#else
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# define _PROF_PROLOGUE
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#endif
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#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
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#define NENTRY(y) _ENTRY(_C_LABEL(y))
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#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
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#define LABEL(y) _LABEL(_C_LABEL(y))
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#define END(y) .size y, . - y
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#define ASMSTR .asciz
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#ifdef __ELF__
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#define RCSID(x) .pushsection ".ident"; .asciz x; .popsection
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#else
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#define RCSID(x) .text; .asciz x
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#endif
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#ifdef NO_KERNEL_RCSIDS
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#define __KERNEL_RCSID(_n, _s) /* nothing */
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#else
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#define __KERNEL_RCSID(_n, _s) RCSID(_s)
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#endif
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#if defined(__ELF__) || defined(__minix)
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#define WEAK_ALIAS(alias,sym) \
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.weak alias; \
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alias = sym
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#endif
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/*
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* STRONG_ALIAS: create a strong alias.
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*/
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#define STRONG_ALIAS(alias,sym) \
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.globl alias; \
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alias = sym
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#ifdef __STDC__
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#define WARN_REFERENCES(sym,msg) \
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.pushsection .gnu.warning. ## sym; \
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.ascii msg; \
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.popsection
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#else
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#define WARN_REFERENCES(sym,msg) \
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.pushsection .gnu.warning./**/sym; \
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.ascii msg; \
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.popsection
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#endif /* __STDC__ */
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#ifdef __minix
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#define IMPORT(sym) \
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.extern _C_LABEL(sym)
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#endif
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#endif /* !_I386_ASM_H_ */
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