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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/parisc/include/asm/bug.h
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/* SPDX-License-Identifier: GPL-2.0 */

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#ifndef _PARISC_BUG_H

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#define _PARISC_BUG_H

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/*

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 * Tell the user there is some problem.

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 * The offending file and line are encoded in the __bug_table section.

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 */

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#ifdef CONFIG_BUG

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#define HAVE_ARCH_BUG

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#define HAVE_ARCH_WARN_ON

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/* the break instruction is used as BUG() marker.  */

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#define	PARISC_BUG_BREAK_ASM	"break 0x1f, 0x1fff"

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#define	PARISC_BUG_BREAK_INSN	0x03ffe01f  /* PARISC_BUG_BREAK_ASM */

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#ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS

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# define __BUG_REL(val) ".word " __stringify(val) " - ."

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#else

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# define __BUG_REL(val) ".word " __stringify(val)

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#endif

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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("\n"					\

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			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\

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			     "\t.pushsection __bug_table,\"a\"\n"	\

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			     "\t.align 4\n"				\

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			     "2:\t" __BUG_REL(1b) "\n"			\

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			     "\t" __BUG_REL(%c0)  "\n"			\

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			     "\t.short %1, %2\n"			\

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			     "\t.blockz %3-2*4-2*2\n"			\

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			     "\t.popsection"				\

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			     : : "i" (__FILE__), "i" (__LINE__),	\

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			     "i" (0), "i" (sizeof(struct bug_entry)) );	\

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		unreachable();						\

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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(PARISC_BUG_BREAK_ASM : : );		\

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		unreachable();						\

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	} while(0)

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#endif

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#ifdef CONFIG_DEBUG_BUGVERBOSE

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#define __WARN_FLAGS(cond_str, flags)					\

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	do {								\

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		asm volatile("\n"					\

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			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\

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			     "\t.pushsection __bug_table,\"a\"\n"	\

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			     "\t.align 4\n"				\

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			     "2:\t" __BUG_REL(1b) "\n"			\

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			     "\t" __BUG_REL(%c0)  "\n"			\

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			     "\t.short %1, %2\n"			\

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			     "\t.blockz %3-2*4-2*2\n"			\

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			     "\t.popsection"				\

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			     : : "i" (WARN_CONDITION_STR(cond_str) __FILE__), "i" (__LINE__), \

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			     "i" (BUGFLAG_WARNING|(flags)),		\

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			     "i" (sizeof(struct bug_entry)) );		\

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	} while(0)

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#else

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#define __WARN_FLAGS(cond_str, flags)					\

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	do {								\

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		asm volatile("\n"					\

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			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\

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			     "\t.pushsection __bug_table,\"a\"\n"	\

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			     "\t.align 4\n"				\

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			     "2:\t" __BUG_REL(1b) "\n"			\

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			     "\t.short %0\n"				\

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			     "\t.blockz %1-4-2\n"			\

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			     "\t.popsection"				\

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			     : : "i" (BUGFLAG_WARNING|(flags)),		\

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			     "i" (sizeof(struct bug_entry)) );		\

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	} while(0)

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#endif

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#define WARN_ON(x) ({						\

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	int __ret_warn_on = !!(x);				\

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	if (__builtin_constant_p(__ret_warn_on)) {		\

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		if (__ret_warn_on)				\

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			__WARN();				\

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	} else {						\

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		if (unlikely(__ret_warn_on))			\

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			__WARN();				\

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	}							\

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	unlikely(__ret_warn_on);				\

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})

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#endif

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#include <asm-generic/bug.h>

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#endif

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