5fbf2e0992
This patch defines a few new macros that can be used to control the visibility of symbols exported by the C library: - ENTRY_PRIVATE() can be used in assembly sources to indicate that an assembler function should have "hidden" visibility, i.e. will never be exported by the C library's shared library. This is the equivalent of using __LIBC_HIDDEN__ for a C function, but ENTRY_PRIVATE() works like ENTRY(), and must be used with END() to tag the end of the function. - __LIBC_ABI_PUBLIC__ can be used to tag a C functions as being part of the C library's public ABI. This is important for a few functions that must be exposed by the NDK to maintain binary compatibility. Once a symbol has been tagged with this macro, it shall *never* be removed from the library, even if it becomes directly unused due to implementation changes (e.g. __is_threaded). - __LIBC_ABI_PRIVATE__ can be used for C functions that should always be exported by the C library because they are used by other libraries in the platform, but should not be exposed by the NDK. It is possible to remove such symbols from the implementation if all callers are also modified. + Add missing END() assembly macro for x86 Change-Id: Ia96236ea0dbec41d57bea634b39d246b30e5e234
135 lines
4.0 KiB
C
135 lines
4.0 KiB
C
/* $OpenBSD: asm.h,v 1.8 2004/06/13 21:49:16 niklas Exp $ */
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/* $NetBSD: asm.h,v 1.7 1994/10/27 04:15:56 cgd 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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/* This is borrowed from FreeBSD /src/sys/i386/include/asmacros.h v1.27 */
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/*
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* CNAME and HIDENAME manage the relationship between symbol names in C
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* and the equivalent assembly language names. CNAME is given a name as
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* it would be used in a C program. It expands to the equivalent assembly
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* language name. HIDENAME is given an assembly-language name, and expands
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* to a possibly-modified form that will be invisible to C programs.
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*/
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#define CNAME(csym) csym
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#define HIDENAME(asmsym) .asmsym
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#ifdef PIC
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#define PIC_PROLOGUE \
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pushl %ebx; \
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call 666f; \
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666: \
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popl %ebx; \
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addl $_C_LABEL(_GLOBAL_OFFSET_TABLE_)+[.-666b], %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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#define _C_LABEL(name) name
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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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/*
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* WEAK ALIAS: create a weak alias
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*/
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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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/*
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* WARN_REFERENCES: create a warning if the specified symbol is referenced
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*/
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#define WARN_REFERENCES(_sym,_msg) \
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.section .gnu.warning. ## _sym ; .ascii _msg ; .text
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/* let kernels and others override entrypoint alignment */
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#ifndef _ALIGN_TEXT
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# define _ALIGN_TEXT .align 2, 0x90
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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 _ASM_SIZE(x) .size x, .-x;
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#define _END(x) \
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.fnend; \
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_ASM_SIZE(x)
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#ifdef GPROF
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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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#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 END(y) _END(_C_LABEL(y))
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#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
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#define ENTRY_PRIVATE(y) ENTRY(y); .hidden _C_LABEL(y)
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#define ALTENTRY(name) .globl _C_LABEL(name); _C_LABEL(name):
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#define ASMSTR .asciz
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#define RCSID(x) .text; .asciz x
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#define __FBSDID(x) RCSID(x)
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#endif /* !_I386_ASM_H_ */
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