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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ptrace.h (3308B)

      1/*
      2 * include/asm-xtensa/ptrace.h
      3 *
      4 * This file is subject to the terms and conditions of the GNU General Public
      5 * License.  See the file "COPYING" in the main directory of this archive
      6 * for more details.
      7 *
      8 * Copyright (C) 2001 - 2005 Tensilica Inc.
      9 */
     10#ifndef _XTENSA_PTRACE_H
     11#define _XTENSA_PTRACE_H
     12
     13#include <asm/kmem_layout.h>
     14#include <uapi/asm/ptrace.h>
     15
     16/*
     17 * Kernel stack
     18 *
     19 *		+-----------------------+  -------- STACK_SIZE
     20 *		|     register file     |  |
     21 *		+-----------------------+  |
     22 *		|    struct pt_regs     |  |
     23 *		+-----------------------+  | ------ PT_REGS_OFFSET
     24 * double	:  16 bytes spill area  :  |  ^
     25 * excetion	:- - - - - - - - - - - -:  |  |
     26 * frame	:    struct pt_regs     :  |  |
     27 *		:- - - - - - - - - - - -:  |  |
     28 *		|                       |  |  |
     29 *		|     memory stack      |  |  |
     30 *		|                       |  |  |
     31 *		~                       ~  ~  ~
     32 *		~                       ~  ~  ~
     33 *		|                       |  |  |
     34 *		|                       |  |  |
     35 *		+-----------------------+  |  | --- STACK_BIAS
     36 *		|  struct task_struct   |  |  |  ^
     37 *  current --> +-----------------------+  |  |  |
     38 *		|  struct thread_info   |  |  |  |
     39 *		+-----------------------+ --------
     40 */
     41
     42#define NO_SYSCALL (-1)
     43
     44#ifndef __ASSEMBLY__
     45
     46#include <asm/coprocessor.h>
     47#include <asm/core.h>
     48
     49/*
     50 * This struct defines the way the registers are stored on the
     51 * kernel stack during a system call or other kernel entry.
     52 */
     53struct pt_regs {
     54	unsigned long pc;		/*   4 */
     55	unsigned long ps;		/*   8 */
     56	unsigned long depc;		/*  12 */
     57	unsigned long exccause;		/*  16 */
     58	unsigned long excvaddr;		/*  20 */
     59	unsigned long debugcause;	/*  24 */
     60	unsigned long wmask;		/*  28 */
     61	unsigned long lbeg;		/*  32 */
     62	unsigned long lend;		/*  36 */
     63	unsigned long lcount;		/*  40 */
     64	unsigned long sar;		/*  44 */
     65	unsigned long windowbase;	/*  48 */
     66	unsigned long windowstart;	/*  52 */
     67	unsigned long syscall;		/*  56 */
     68	unsigned long icountlevel;	/*  60 */
     69	unsigned long scompare1;	/*  64 */
     70	unsigned long threadptr;	/*  68 */
     71
     72	/* Additional configurable registers that are used by the compiler. */
     73	xtregs_opt_t xtregs_opt;
     74
     75	/* Make sure the areg field is 16 bytes aligned. */
     76	int align[0] __attribute__ ((aligned(16)));
     77
     78	/* current register frame.
     79	 * Note: The ESF for kernel exceptions ends after 16 registers!
     80	 */
     81	unsigned long areg[XCHAL_NUM_AREGS];
     82};
     83
     84# define arch_has_single_step()	(1)
     85# define task_pt_regs(tsk) ((struct pt_regs*) \
     86	(task_stack_page(tsk) + KERNEL_STACK_SIZE) - 1)
     87# define user_mode(regs) (((regs)->ps & 0x00000020)!=0)
     88# define instruction_pointer(regs) ((regs)->pc)
     89# define return_pointer(regs) (MAKE_PC_FROM_RA((regs)->areg[0], \
     90					       (regs)->areg[1]))
     91
     92# ifndef CONFIG_SMP
     93#  define profile_pc(regs) instruction_pointer(regs)
     94# else
     95#  define profile_pc(regs)						\
     96	({								\
     97		in_lock_functions(instruction_pointer(regs)) ?		\
     98		return_pointer(regs) : instruction_pointer(regs);	\
     99	})
    100# endif
    101
    102#define user_stack_pointer(regs) ((regs)->areg[1])
    103
    104static inline unsigned long regs_return_value(struct pt_regs *regs)
    105{
    106	return regs->areg[2];
    107}
    108
    109#else	/* __ASSEMBLY__ */
    110
    111# include <asm/asm-offsets.h>
    112#define PT_REGS_OFFSET	  (KERNEL_STACK_SIZE - PT_USER_SIZE)
    113
    114#endif	/* !__ASSEMBLY__ */
    115
    116#endif	/* _XTENSA_PTRACE_H */