include/asm-xtensa/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
  11 #ifndef _XTENSA_PTRACE_H
  12 #define _XTENSA_PTRACE_H
  13
  14 /*
  15  * Kernel stack
  16  *
  17  *              +-----------------------+  -------- STACK_SIZE
  18  *              |     register file     |  |
  19  *              +-----------------------+  |
  20  *              |    struct pt_regs     |  |
  21  *              +-----------------------+  | ------ PT_REGS_OFFSET
  22  * double       :  16 bytes spill area  :  |  ^
  23  * excetion     :- - - - - - - - - - - -:  |  |
  24  * frame        :    struct pt_regs     :  |  |
  25  *              :- - - - - - - - - - - -:  |  |
  26  *              |                       |  |  |
  27  *              |     memory stack      |  |  |
  28  *              |                       |  |  |
  29  *              ~                       ~  ~  ~
  30  *              ~                       ~  ~  ~
  31  *              |                       |  |  |
  32  *              |                       |  |  |
  33  *              +-----------------------+  |  | --- STACK_BIAS
  34  *              |  struct task_struct   |  |  |  ^
  35  *  current --> +-----------------------+  |  |  |
  36  *              |  struct thread_info   |  |  |  |
  37  *              +-----------------------+ --------
  38  */
  39
  40 #define KERNEL_STACK_SIZE (2 * PAGE_SIZE)
  41
  42 /*  Offsets for exception_handlers[] (3 x 64-entries x 4-byte tables). */
  43
  44 #define EXC_TABLE_KSTK          0x004   /* Kernel Stack */
  45 #define EXC_TABLE_DOUBLE_SAVE   0x008   /* Double exception save area for a0 */
  46 #define EXC_TABLE_FIXUP         0x00c   /* Fixup handler */
  47 #define EXC_TABLE_PARAM         0x010   /* For passing a parameter to fixup */
  48 #define EXC_TABLE_SYSCALL_SAVE  0x014   /* For fast syscall handler */
  49 #define EXC_TABLE_FAST_USER     0x100   /* Fast user exception handler */
  50 #define EXC_TABLE_FAST_KERNEL   0x200   /* Fast kernel exception handler */
  51 #define EXC_TABLE_DEFAULT       0x300   /* Default C-Handler */
  52 #define EXC_TABLE_SIZE          0x400
  53
  54 /* Registers used by strace */
  55
  56 <<<<<<< HEAD:include/asm-xtensa/ptrace.h
  57 #define REG_A_BASE      0xfc000000
  58 #define REG_AR_BASE     0x04000000
  59 #define REG_PC          0x14000000
  60 #define REG_PS          0x080000e6
  61 #define REG_WB          0x08000048
  62 #define REG_WS          0x08000049
  63 #define REG_LBEG        0x08000000
  64 #define REG_LEND        0x08000001
  65 #define REG_LCOUNT      0x08000002
  66 #define REG_SAR         0x08000003
  67 #define REG_DEPC        0x080000c0
  68 #define REG_EXCCAUSE    0x080000e8
  69 #define REG_EXCVADDR    0x080000ee
  70 #define SYSCALL_NR      0x1
  71
  72 #define AR_REGNO_TO_A_REGNO(ar, wb) (ar - wb*4) & ~(XCHAL_NUM_AREGS - 1)
  73 =======
  74 #define REG_A_BASE      0x0000
  75 #define REG_AR_BASE     0x0100
  76 #define REG_PC          0x0020
  77 #define REG_PS          0x02e6
  78 #define REG_WB          0x0248
  79 #define REG_WS          0x0249
  80 #define REG_LBEG        0x0200
  81 #define REG_LEND        0x0201
  82 #define REG_LCOUNT      0x0202
  83 #define REG_SAR         0x0203
  84
  85 #define SYSCALL_NR      0x00ff
  86 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:include/asm-xtensa/ptrace.h
  87
  88 /* Other PTRACE_ values defined in <linux/ptrace.h> using values 0-9,16,17,24 */
  89
  90 <<<<<<< HEAD:include/asm-xtensa/ptrace.h
  91 #define PTRACE_GETREGS            12
  92 #define PTRACE_SETREGS            13
  93 #define PTRACE_GETFPREGS          14
  94 #define PTRACE_SETFPREGS          15
  95 #define PTRACE_GETFPREGSIZE       18
  96 =======
  97 #define PTRACE_GETREGS          12
  98 #define PTRACE_SETREGS          13
  99 #define PTRACE_GETXTREGS        18
 100 #define PTRACE_SETXTREGS        19
 101 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:include/asm-xtensa/ptrace.h
 102
 103 #ifndef __ASSEMBLY__
 104
 105 <<<<<<< HEAD:include/asm-xtensa/ptrace.h
 106 =======
 107 #ifdef __KERNEL__
 108
 109 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:include/asm-xtensa/ptrace.h
 110 /*
 111  * This struct defines the way the registers are stored on the
 112  * kernel stack during a system call or other kernel entry.
 113  */
 114 struct pt_regs {
 115         unsigned long pc;               /*   4 */
 116         unsigned long ps;               /*   8 */
 117         unsigned long depc;             /*  12 */
 118         unsigned long exccause;         /*  16 */
 119         unsigned long excvaddr;         /*  20 */
 120         unsigned long debugcause;       /*  24 */
 121         unsigned long wmask;            /*  28 */
 122         unsigned long lbeg;             /*  32 */
 123         unsigned long lend;             /*  36 */
 124         unsigned long lcount;           /*  40 */
 125         unsigned long sar;              /*  44 */
 126         unsigned long windowbase;       /*  48 */
 127         unsigned long windowstart;      /*  52 */
 128         unsigned long syscall;          /*  56 */
 129         unsigned long icountlevel;      /*  60 */
 130         int reserved[1];                /*  64 */
 131
 132 <<<<<<< HEAD:include/asm-xtensa/ptrace.h
 133 =======
 134         /* Additional configurable registers that are used by the compiler. */
 135         xtregs_opt_t xtregs_opt;
 136
 137 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:include/asm-xtensa/ptrace.h
 138         /* Make sure the areg field is 16 bytes aligned. */
 139         int align[0] __attribute__ ((aligned(16)));
 140
 141         /* current register frame.
 142          * Note: The ESF for kernel exceptions ends after 16 registers!
 143          */
 144         unsigned long areg[16];         /* 128 (64) */
 145 };
 146
 147 <<<<<<< HEAD:include/asm-xtensa/ptrace.h
 148 #ifdef __KERNEL__
 149
 150 =======
 151 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:include/asm-xtensa/ptrace.h
 152 #include <asm/variant/core.h>
 153
 154 # define task_pt_regs(tsk) ((struct pt_regs*) \
 155   (task_stack_page(tsk) + KERNEL_STACK_SIZE - (XCHAL_NUM_AREGS-16)*4) - 1)
 156 # define user_mode(regs) (((regs)->ps & 0x00000020)!=0)
 157 # define instruction_pointer(regs) ((regs)->pc)
 158 extern void show_regs(struct pt_regs *);
 159
 160 # ifndef CONFIG_SMP
 161 #  define profile_pc(regs) instruction_pointer(regs)
 162 # endif
 163 #endif /* __KERNEL__ */
 164
 165 #else   /* __ASSEMBLY__ */
 166
 167 #ifdef __KERNEL__
 168 # include <asm/asm-offsets.h>
 169 #define PT_REGS_OFFSET    (KERNEL_STACK_SIZE - PT_USER_SIZE)
 170 #endif
 171
 172 #endif  /* !__ASSEMBLY__ */
 173 #endif  /* _XTENSA_PTRACE_H */