9d40326830
Rewrite crtbegin.S -> crtbegin.c crtbegin_so.S -> crtbegin_so.c This change allows us to generate PIC code without relying on text relocations. As a consequence of this rewrite, also rewrite __dso_handle.S -> __dso_handle.c __dso_handle_so.S -> __dso_handle_so.c atexit.S -> atexit.c In crtbegin.c _start, place the __PREINIT_ARRAY__, __INIT_ARRAY__, __FINI_ARRAY__, and __CTOR_LIST__ variables onto the stack, instead of passing a pointer to the text section of the binary. This change appears sorta wonky, as I attempted to preserve, as much as possible, the structure of the original assembly. As a result, you have C files including other C files, and other programming uglyness. Result: This change reduces the number of files with text-relocations from 315 to 19 on my Android build. Before: $ scanelf -aR $OUT/system | grep TEXTREL | wc -l 315 After: $ scanelf -aR $OUT/system | grep TEXTREL | wc -l 19 Change-Id: Ib9f98107c0eeabcb606e1ddc7ed7fc4eba01c9c4
35 lines
1.5 KiB
C
35 lines
1.5 KiB
C
/*
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* Copyright (C) 2012 The Android Open Source Project
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* All rights reserved.
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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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* * 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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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* 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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#ifndef CRT_LEGACY_WORKAROUND
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__attribute__ ((visibility ("hidden")))
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#endif
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__attribute__ ((section (".bss")))
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void *__dso_handle = (void *) 0;
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