Turn __bss_start and __bss_end__ from linker-generated to compiler-generated symbols, causing relocations for these symbols to change type, from R_ARM_ABS32 to R_ARM_RELATIVE. This should have no functional impact, as it affects references to __bss_start and __bss_end__ only before relocation, and no such references are done. Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>master
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/*
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* Copyright 2013 Albert ARIBAUD <albert.u.boot@aribaud.net> |
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* |
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* See file CREDITS for list of people who contributed to this |
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* project. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of |
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* the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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* MA 02111-1307 USA |
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*/ |
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/**
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* These two symbols are declared in a C file so that the linker |
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* uses R_ARM_RELATIVE relocation, rather than the R_ARM_ABS32 one |
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* it would use if the symbols were defined in the linker file. |
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* Using only R_ARM_RELATIVE relocation ensures that references to |
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* the symbols are correct after as well as before relocation. |
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* |
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* We need a 0-byte-size type for these symbols, and the compiler |
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* does not allow defining objects of C type 'void'. Using an empty |
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* struct is allowed by the compiler, but causes gcc versions 4.4 and |
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* below to complain about aliasing. Therefore we use the next best |
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* thing: zero-sized arrays, which are both 0-byte-size and exempt from |
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* aliasing warnings. |
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*/ |
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char __bss_start[0] __attribute__((used, section(".__bss_start"))); |
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char __bss_end__[0] __attribute__((used, section(".__bss_end__"))); |
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