mirror of https://gitee.com/openkylin/linux.git
62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
#ifndef _ASMARM_BUG_H
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#define _ASMARM_BUG_H
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#ifdef CONFIG_BUG
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/*
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* Use a suitable undefined instruction to use for ARM/Thumb2 bug handling.
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* We need to be careful not to conflict with those used by other modules and
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* the register_undef_hook() system.
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*/
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#ifdef CONFIG_THUMB2_KERNEL
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#define BUG_INSTR_VALUE 0xde02
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#define BUG_INSTR_TYPE ".hword "
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#else
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#define BUG_INSTR_VALUE 0xe7f001f2
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#define BUG_INSTR_TYPE ".word "
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#endif
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#define BUG() _BUG(__FILE__, __LINE__, BUG_INSTR_VALUE)
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#define _BUG(file, line, value) __BUG(file, line, value)
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#ifdef CONFIG_DEBUG_BUGVERBOSE
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/*
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* The extra indirection is to ensure that the __FILE__ string comes through
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* OK. Many version of gcc do not support the asm %c parameter which would be
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* preferable to this unpleasantness. We use mergeable string sections to
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* avoid multiple copies of the string appearing in the kernel image.
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*/
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#define __BUG(__file, __line, __value) \
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do { \
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BUILD_BUG_ON(sizeof(struct bug_entry) != 12); \
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asm volatile("1:\t" BUG_INSTR_TYPE #__value "\n" \
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".pushsection .rodata.str, \"aMS\", %progbits, 1\n" \
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"2:\t.asciz " #__file "\n" \
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".popsection\n" \
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".pushsection __bug_table,\"a\"\n" \
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"3:\t.word 1b, 2b\n" \
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"\t.hword " #__line ", 0\n" \
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".popsection"); \
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unreachable(); \
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} while (0)
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#else /* not CONFIG_DEBUG_BUGVERBOSE */
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#define __BUG(__file, __line, __value) \
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do { \
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asm volatile(BUG_INSTR_TYPE #__value); \
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unreachable(); \
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} while (0)
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#endif /* CONFIG_DEBUG_BUGVERBOSE */
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#define HAVE_ARCH_BUG
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#endif /* CONFIG_BUG */
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#include <asm-generic/bug.h>
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#endif
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