arch/xtensa/include/asm/ptrace.h

   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 <uapi/asm/ptrace.h>
  14
  15
  16 #ifndef __ASSEMBLY__
  17
  18 #include <asm/coprocessor.h>
  19
  20 /*
  21  * This struct defines the way the registers are stored on the
  22  * kernel stack during a system call or other kernel entry.
  23  */
  24 struct pt_regs {
  25         unsigned long pc;               /*   4 */
  26         unsigned long ps;               /*   8 */
  27         unsigned long depc;             /*  12 */
  28         unsigned long exccause;         /*  16 */
  29         unsigned long excvaddr;         /*  20 */
  30         unsigned long debugcause;       /*  24 */
  31         unsigned long wmask;            /*  28 */
  32         unsigned long lbeg;             /*  32 */
  33         unsigned long lend;             /*  36 */
  34         unsigned long lcount;           /*  40 */
  35         unsigned long sar;              /*  44 */
  36         unsigned long windowbase;       /*  48 */
  37         unsigned long windowstart;      /*  52 */
  38         unsigned long syscall;          /*  56 */
  39         unsigned long icountlevel;      /*  60 */
  40         unsigned long scompare1;        /*  64 */
  41         unsigned long threadptr;        /*  68 */
  42
  43         /* Additional configurable registers that are used by the compiler. */
  44         xtregs_opt_t xtregs_opt;
  45
  46         /* Make sure the areg field is 16 bytes aligned. */
  47         int align[0] __attribute__ ((aligned(16)));
  48
  49         /* current register frame.
  50          * Note: The ESF for kernel exceptions ends after 16 registers!
  51          */
  52         unsigned long areg[16];
  53 };
  54
  55 #include <variant/core.h>
  56
  57 # define arch_has_single_step() (1)
  58 # define task_pt_regs(tsk) ((struct pt_regs*) \
  59         (task_stack_page(tsk) + KERNEL_STACK_SIZE - (XCHAL_NUM_AREGS-16)*4) - 1)
  60 # define user_mode(regs) (((regs)->ps & 0x00000020)!=0)
  61 # define instruction_pointer(regs) ((regs)->pc)
  62 # define return_pointer(regs) (MAKE_PC_FROM_RA((regs)->areg[0], \
  63                                                (regs)->areg[1]))
  64
  65 # ifndef CONFIG_SMP
  66 #  define profile_pc(regs) instruction_pointer(regs)
  67 # else
  68 #  define profile_pc(regs)                                              \
  69         ({                                                              \
  70                 in_lock_functions(instruction_pointer(regs)) ?          \
  71                 return_pointer(regs) : instruction_pointer(regs);       \
  72         })
  73 # endif
  74
  75 #define user_stack_pointer(regs) ((regs)->areg[1])
  76
  77 #else   /* __ASSEMBLY__ */
  78
  79 # include <asm/asm-offsets.h>
  80 #define PT_REGS_OFFSET    (KERNEL_STACK_SIZE - PT_USER_SIZE)
  81
  82 #endif  /* !__ASSEMBLY__ */
  83
  84 #endif  /* _XTENSA_PTRACE_H */