ptrace.h

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/*
 * include/asm-xtensa/ptrace.h
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2001 - 2005 Tensilica Inc.
 */
#ifndef _XTENSA_PTRACE_H
#define _XTENSA_PTRACE_H

#include <uapi/asm/ptrace.h>


#ifndef __ASSEMBLY__

#include <asm/coprocessor.h>

/*
 * This struct defines the way the registers are stored on the
 * kernel stack during a system call or other kernel entry.
 */
struct pt_regs {
    unsigned long pc;       /*   4 */
    unsigned long ps;       /*   8 */
    unsigned long depc;     /*  12 */
    unsigned long exccause;     /*  16 */
    unsigned long excvaddr;     /*  20 */
    unsigned long debugcause;   /*  24 */
    unsigned long wmask;        /*  28 */
    unsigned long lbeg;     /*  32 */
    unsigned long lend;     /*  36 */
    unsigned long lcount;       /*  40 */
    unsigned long sar;      /*  44 */
    unsigned long windowbase;   /*  48 */
    unsigned long windowstart;  /*  52 */
    unsigned long syscall;      /*  56 */
    unsigned long icountlevel;  /*  60 */
    int reserved[1];        /*  64 */

    /* Additional configurable registers that are used by the compiler. */
    xtregs_opt_t xtregs_opt;

    /* Make sure the areg field is 16 bytes aligned. */
    int align[0] __attribute__ ((aligned(16)));

    /* current register frame.
     * Note: The ESF for kernel exceptions ends after 16 registers!
     */
    unsigned long areg[16];     /* 128 (64) */
};

#include <variant/core.h>

# define arch_has_single_step() (1)
# define task_pt_regs(tsk) ((struct pt_regs*) \
  (task_stack_page(tsk) + KERNEL_STACK_SIZE - (XCHAL_NUM_AREGS-16)*4) - 1)
# define user_mode(regs) (((regs)->ps & 0x00000020)!=0)
# define instruction_pointer(regs) ((regs)->pc)

# ifndef CONFIG_SMP
#  define profile_pc(regs) instruction_pointer(regs)
# endif

#else   /* __ASSEMBLY__ */

# include <asm/asm-offsets.h>
#define PT_REGS_OFFSET    (KERNEL_STACK_SIZE - PT_USER_SIZE)

#endif  /* !__ASSEMBLY__ */

#endif  /* _XTENSA_PTRACE_H */