dc34d312c7
Previously we haven't been doing anything with verbose BUG() reporting, and we've been relying on the oops path for handling BUG()'s, which is rather sub-optimal. This switches BUG handling to use a fixed trapa vector (#0x3e) where we construct a small bug frame post trapa instruction to get the context right. This also makes it trivial to wire up a DIE_BUG for the atomic die chain, which we couldn't really do before. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
54 lines
919 B
C
54 lines
919 B
C
#ifndef __ASM_SH_BUG_H
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#define __ASM_SH_BUG_H
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#ifdef CONFIG_BUG
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struct bug_frame {
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unsigned short opcode;
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unsigned short line;
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const char *file;
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const char *func;
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};
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struct pt_regs;
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extern void handle_BUG(struct pt_regs *);
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#define TRAPA_BUG_OPCODE 0xc33e /* trapa #0x3e */
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#ifdef CONFIG_DEBUG_BUGVERBOSE
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#define BUG() \
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do { \
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__asm__ __volatile__ ( \
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".align 2\n\t" \
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".short %O0\n\t" \
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".short %O1\n\t" \
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".long %O2\n\t" \
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".long %O3\n\t" \
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: \
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: "n" (TRAPA_BUG_OPCODE), \
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"i" (__LINE__), "X" (__FILE__), \
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"X" (__FUNCTION__)); \
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} while (0)
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#else
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#define BUG() \
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do { \
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__asm__ __volatile__ ( \
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".align 2\n\t" \
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".short %O0\n\t" \
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: \
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: "n" (TRAPA_BUG_OPCODE)); \
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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 /* __ASM_SH_BUG_H */
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