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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unwind.h (3446B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
      4 */
      5
      6#ifndef _ASM_ARC_UNWIND_H
      7#define _ASM_ARC_UNWIND_H
      8
      9#ifdef CONFIG_ARC_DW2_UNWIND
     10
     11#include <linux/sched.h>
     12
     13struct arc700_regs {
     14	unsigned long r0;
     15	unsigned long r1;
     16	unsigned long r2;
     17	unsigned long r3;
     18	unsigned long r4;
     19	unsigned long r5;
     20	unsigned long r6;
     21	unsigned long r7;
     22	unsigned long r8;
     23	unsigned long r9;
     24	unsigned long r10;
     25	unsigned long r11;
     26	unsigned long r12;
     27	unsigned long r13;
     28	unsigned long r14;
     29	unsigned long r15;
     30	unsigned long r16;
     31	unsigned long r17;
     32	unsigned long r18;
     33	unsigned long r19;
     34	unsigned long r20;
     35	unsigned long r21;
     36	unsigned long r22;
     37	unsigned long r23;
     38	unsigned long r24;
     39	unsigned long r25;
     40	unsigned long r26;
     41	unsigned long r27;	/* fp */
     42	unsigned long r28;	/* sp */
     43	unsigned long r29;
     44	unsigned long r30;
     45	unsigned long r31;	/* blink */
     46	unsigned long r63;	/* pc */
     47};
     48
     49struct unwind_frame_info {
     50	struct arc700_regs regs;
     51	struct task_struct *task;
     52	unsigned call_frame:1;
     53};
     54
     55#define UNW_PC(frame)		((frame)->regs.r63)
     56#define UNW_SP(frame)		((frame)->regs.r28)
     57#define UNW_BLINK(frame)	((frame)->regs.r31)
     58
     59/* Rajesh FIXME */
     60#ifdef CONFIG_FRAME_POINTER
     61#define UNW_FP(frame)		((frame)->regs.r27)
     62#define FRAME_RETADDR_OFFSET	4
     63#define FRAME_LINK_OFFSET	0
     64#define STACK_BOTTOM_UNW(tsk)	STACK_LIMIT((tsk)->thread.ksp)
     65#define STACK_TOP_UNW(tsk)	((tsk)->thread.ksp)
     66#else
     67#define UNW_FP(frame)		((void)(frame), 0)
     68#endif
     69
     70#define STACK_LIMIT(ptr)	(((ptr) - 1) & ~(THREAD_SIZE - 1))
     71
     72#define UNW_REGISTER_INFO \
     73	PTREGS_INFO(r0), \
     74	PTREGS_INFO(r1), \
     75	PTREGS_INFO(r2), \
     76	PTREGS_INFO(r3), \
     77	PTREGS_INFO(r4), \
     78	PTREGS_INFO(r5), \
     79	PTREGS_INFO(r6), \
     80	PTREGS_INFO(r7), \
     81	PTREGS_INFO(r8), \
     82	PTREGS_INFO(r9), \
     83	PTREGS_INFO(r10), \
     84	PTREGS_INFO(r11), \
     85	PTREGS_INFO(r12), \
     86	PTREGS_INFO(r13), \
     87	PTREGS_INFO(r14), \
     88	PTREGS_INFO(r15), \
     89	PTREGS_INFO(r16), \
     90	PTREGS_INFO(r17), \
     91	PTREGS_INFO(r18), \
     92	PTREGS_INFO(r19), \
     93	PTREGS_INFO(r20), \
     94	PTREGS_INFO(r21), \
     95	PTREGS_INFO(r22), \
     96	PTREGS_INFO(r23), \
     97	PTREGS_INFO(r24), \
     98	PTREGS_INFO(r25), \
     99	PTREGS_INFO(r26), \
    100	PTREGS_INFO(r27), \
    101	PTREGS_INFO(r28), \
    102	PTREGS_INFO(r29), \
    103	PTREGS_INFO(r30), \
    104	PTREGS_INFO(r31), \
    105	PTREGS_INFO(r63)
    106
    107#define UNW_DEFAULT_RA(raItem, dataAlign) \
    108	((raItem).where == Memory && !((raItem).value * (dataAlign) + 4))
    109
    110extern int arc_unwind(struct unwind_frame_info *frame);
    111extern void arc_unwind_init(void);
    112extern void *unwind_add_table(struct module *module, const void *table_start,
    113			      unsigned long table_size);
    114extern void unwind_remove_table(void *handle, int init_only);
    115
    116static inline int
    117arch_unwind_init_running(struct unwind_frame_info *info,
    118			 int (*callback) (struct unwind_frame_info *info,
    119					  void *arg),
    120			 void *arg)
    121{
    122	return 0;
    123}
    124
    125static inline int arch_unw_user_mode(const struct unwind_frame_info *info)
    126{
    127	return 0;
    128}
    129
    130static inline void arch_unw_init_blocked(struct unwind_frame_info *info)
    131{
    132	return;
    133}
    134
    135static inline void arch_unw_init_frame_info(struct unwind_frame_info *info,
    136					    struct pt_regs *regs)
    137{
    138	return;
    139}
    140
    141#else
    142
    143#define UNW_PC(frame) ((void)(frame), 0)
    144#define UNW_SP(frame) ((void)(frame), 0)
    145#define UNW_FP(frame) ((void)(frame), 0)
    146
    147static inline void arc_unwind_init(void)
    148{
    149}
    150
    151#define unwind_add_table(a, b, c)
    152#define unwind_remove_table(a, b)
    153
    154#endif /* CONFIG_ARC_DW2_UNWIND */
    155
    156#endif /* _ASM_ARC_UNWIND_H */