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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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db44e9c5ec
Currently. we can only use BUG() from C code, though there are situations where we would like an equivalent mechanism in assembly code. This patch refactors our BUG() definition such that it can be used in either C or assembly, in the form of a new ASM_BUG(). The refactoring requires the removal of escape sequences, such as '\n' and '\t', but these aren't strictly necessary as we can use ';' to terminate assembler statements. The low-level assembly is factored out into <asm/asm-bug.h>, with <asm/bug.h> retained as the C wrapper. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Dave Martin <dave.martin@arm.com> Cc: James Morse <james.morse@arm.com> Cc: Will Deacon <will.deacon@arm.com>
40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/*
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* Copyright (C) 2015 ARM Limited
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* Author: Dave Martin <Dave.Martin@arm.com>
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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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#ifndef _ARCH_ARM64_ASM_BUG_H
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#define _ARCH_ARM64_ASM_BUG_H
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#include <linux/stringify.h>
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#include <asm/asm-bug.h>
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#define __BUG_FLAGS(flags) \
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asm volatile (__stringify(ASM_BUG_FLAGS(flags)));
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#define BUG() do { \
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__BUG_FLAGS(0); \
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unreachable(); \
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} while (0)
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#define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLAG_WARNING|(flags))
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#define HAVE_ARCH_BUG
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#include <asm-generic/bug.h>
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#endif /* ! _ARCH_ARM64_ASM_BUG_H */
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