cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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bug.h (2835B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __ASM_SH_BUG_H
      3#define __ASM_SH_BUG_H
      4
      5#include <linux/linkage.h>
      6
      7#define TRAPA_BUG_OPCODE	0xc33e	/* trapa #0x3e */
      8#define BUGFLAG_UNWINDER	(1 << 1)
      9
     10#ifdef CONFIG_GENERIC_BUG
     11#define HAVE_ARCH_BUG
     12#define HAVE_ARCH_WARN_ON
     13
     14/**
     15 * _EMIT_BUG_ENTRY
     16 * %1 - __FILE__
     17 * %2 - __LINE__
     18 * %3 - trap type
     19 * %4 - sizeof(struct bug_entry)
     20 *
     21 * The trapa opcode itself sits in %0.
     22 * The %O notation is used to avoid # generation.
     23 *
     24 * The offending file and line are encoded in the __bug_table section.
     25 */
     26#ifdef CONFIG_DEBUG_BUGVERBOSE
     27#define _EMIT_BUG_ENTRY				\
     28	"\t.pushsection __bug_table,\"aw\"\n"	\
     29	"2:\t.long 1b, %O1\n"			\
     30	"\t.short %O2, %O3\n"			\
     31	"\t.org 2b+%O4\n"			\
     32	"\t.popsection\n"
     33#else
     34#define _EMIT_BUG_ENTRY				\
     35	"\t.pushsection __bug_table,\"aw\"\n"	\
     36	"2:\t.long 1b\n"			\
     37	"\t.short %O3\n"			\
     38	"\t.org 2b+%O4\n"			\
     39	"\t.popsection\n"
     40#endif
     41
     42#define BUG()						\
     43do {							\
     44	__asm__ __volatile__ (				\
     45		"1:\t.short %O0\n"			\
     46		_EMIT_BUG_ENTRY				\
     47		 :					\
     48		 : "n" (TRAPA_BUG_OPCODE),		\
     49		   "i" (__FILE__),			\
     50		   "i" (__LINE__), "i" (0),		\
     51		   "i" (sizeof(struct bug_entry)));	\
     52	unreachable();					\
     53} while (0)
     54
     55#define __WARN_FLAGS(flags)				\
     56do {							\
     57	__asm__ __volatile__ (				\
     58		"1:\t.short %O0\n"			\
     59		 _EMIT_BUG_ENTRY			\
     60		 :					\
     61		 : "n" (TRAPA_BUG_OPCODE),		\
     62		   "i" (__FILE__),			\
     63		   "i" (__LINE__),			\
     64		   "i" (BUGFLAG_WARNING|(flags)),	\
     65		   "i" (sizeof(struct bug_entry)));	\
     66} while (0)
     67
     68#define WARN_ON(x) ({						\
     69	int __ret_warn_on = !!(x);				\
     70	if (__builtin_constant_p(__ret_warn_on)) {		\
     71		if (__ret_warn_on)				\
     72			__WARN();				\
     73	} else {						\
     74		if (unlikely(__ret_warn_on))			\
     75			__WARN();				\
     76	}							\
     77	unlikely(__ret_warn_on);				\
     78})
     79
     80#define UNWINDER_BUG()					\
     81do {							\
     82	__asm__ __volatile__ (				\
     83		"1:\t.short %O0\n"			\
     84		_EMIT_BUG_ENTRY				\
     85		 :					\
     86		 : "n" (TRAPA_BUG_OPCODE),		\
     87		   "i" (__FILE__),			\
     88		   "i" (__LINE__),			\
     89		   "i" (BUGFLAG_UNWINDER),		\
     90		   "i" (sizeof(struct bug_entry)));	\
     91} while (0)
     92
     93#define UNWINDER_BUG_ON(x) ({					\
     94	int __ret_unwinder_on = !!(x);				\
     95	if (__builtin_constant_p(__ret_unwinder_on)) {		\
     96		if (__ret_unwinder_on)				\
     97			UNWINDER_BUG();				\
     98	} else {						\
     99		if (unlikely(__ret_unwinder_on))		\
    100			UNWINDER_BUG();				\
    101	}							\
    102	unlikely(__ret_unwinder_on);				\
    103})
    104
    105#else
    106
    107#define UNWINDER_BUG	BUG
    108#define UNWINDER_BUG_ON	BUG_ON
    109
    110#endif /* CONFIG_GENERIC_BUG */
    111
    112#include <asm-generic/bug.h>
    113
    114struct pt_regs;
    115
    116/* arch/sh/kernel/traps.c */
    117extern void die(const char *str, struct pt_regs *regs, long err) __attribute__ ((noreturn));
    118extern void die_if_kernel(const char *str, struct pt_regs *regs, long err);
    119extern void die_if_no_fixup(const char *str, struct pt_regs *regs, long err);
    120
    121#endif /* __ASM_SH_BUG_H */