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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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fa3eb71d96
Currently ASM_BUG() and its constituent macros define local assembler labels 0, 1 and 2 internally, which carries a high risk of clash with callers' labels and consequent mis-assembly. This patch gives the labels a big random offset to minimise the chance of such errors. Signed-off-by: Dave Martin <Dave.Martin@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
#ifndef __ASM_ASM_BUG_H
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/*
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* Copyright (C) 2017 ARM Limited
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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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, see <http://www.gnu.org/licenses/>.
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*/
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#define __ASM_ASM_BUG_H
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#include <asm/brk-imm.h>
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#ifdef CONFIG_DEBUG_BUGVERBOSE
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#define _BUGVERBOSE_LOCATION(file, line) __BUGVERBOSE_LOCATION(file, line)
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#define __BUGVERBOSE_LOCATION(file, line) \
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.pushsection .rodata.str,"aMS",@progbits,1; \
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14472: .string file; \
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.popsection; \
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\
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.long 14472b - 14470b; \
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.short line;
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#else
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#define _BUGVERBOSE_LOCATION(file, line)
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#endif
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#ifdef CONFIG_GENERIC_BUG
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#define __BUG_ENTRY(flags) \
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.pushsection __bug_table,"aw"; \
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.align 2; \
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14470: .long 14471f - 14470b; \
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_BUGVERBOSE_LOCATION(__FILE__, __LINE__) \
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.short flags; \
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.popsection; \
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14471:
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#else
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#define __BUG_ENTRY(flags)
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#endif
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#define ASM_BUG_FLAGS(flags) \
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__BUG_ENTRY(flags) \
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brk BUG_BRK_IMM
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#define ASM_BUG() ASM_BUG_FLAGS(0)
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#endif /* __ASM_ASM_BUG_H */
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