arch/tile/include/uapi/asm/ptrace.h

   1 /*
   2  * Copyright 2010 Tilera Corporation. All Rights Reserved.
   3  *
   4  *   This program is free software; you can redistribute it and/or
   5  *   modify it under the terms of the GNU General Public License
   6  *   as published by the Free Software Foundation, version 2.
   7  *
   8  *   This program is distributed in the hope that it will be useful, but
   9  *   WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  11  *   NON INFRINGEMENT.  See the GNU General Public License for
  12  *   more details.
  13  */
  14
  15 #ifndef _UAPI_ASM_TILE_PTRACE_H
  16 #define _UAPI_ASM_TILE_PTRACE_H
  17
  18 #include <arch/chip.h>
  19 #include <arch/abi.h>
  20
  21 /* These must match struct pt_regs, below. */
  22 #if CHIP_WORD_SIZE() == 32
  23 #define PTREGS_OFFSET_REG(n)    ((n)*4)
  24 #else
  25 #define PTREGS_OFFSET_REG(n)    ((n)*8)
  26 #endif
  27 #define PTREGS_OFFSET_BASE      0
  28 #define PTREGS_OFFSET_TP        PTREGS_OFFSET_REG(53)
  29 #define PTREGS_OFFSET_SP        PTREGS_OFFSET_REG(54)
  30 #define PTREGS_OFFSET_LR        PTREGS_OFFSET_REG(55)
  31 #define PTREGS_NR_GPRS          56
  32 #define PTREGS_OFFSET_PC        PTREGS_OFFSET_REG(56)
  33 #define PTREGS_OFFSET_EX1       PTREGS_OFFSET_REG(57)
  34 #define PTREGS_OFFSET_FAULTNUM  PTREGS_OFFSET_REG(58)
  35 #define PTREGS_OFFSET_ORIG_R0   PTREGS_OFFSET_REG(59)
  36 #define PTREGS_OFFSET_FLAGS     PTREGS_OFFSET_REG(60)
  37 #if CHIP_HAS_CMPEXCH()
  38 #define PTREGS_OFFSET_CMPEXCH   PTREGS_OFFSET_REG(61)
  39 #endif
  40 #define PTREGS_SIZE             PTREGS_OFFSET_REG(64)
  41
  42
  43 #ifndef __ASSEMBLY__
  44
  45 #ifndef __KERNEL__
  46 /* Provide appropriate length type to userspace regardless of -m32/-m64. */
  47 typedef uint_reg_t pt_reg_t;
  48 #endif
  49
  50 /*
  51  * This struct defines the way the registers are stored on the stack during a
  52  * system call or exception.  "struct sigcontext" has the same shape.
  53  */
  54 struct pt_regs {
  55         union {
  56                 /* Saved main processor registers; 56..63 are special. */
  57                 pt_reg_t regs[56];
  58                 struct {
  59                         pt_reg_t __regs[53];
  60                         pt_reg_t tp;            /* aliases regs[TREG_TP] */
  61                         pt_reg_t sp;            /* aliases regs[TREG_SP] */
  62                         pt_reg_t lr;            /* aliases regs[TREG_LR] */
  63                 };
  64         };
  65
  66         /* Saved special registers. */
  67         pt_reg_t pc;            /* stored in EX_CONTEXT_K_0 */
  68         pt_reg_t ex1;           /* stored in EX_CONTEXT_K_1 (PL and ICS bit) */
  69         pt_reg_t faultnum;      /* fault number (INT_SWINT_1 for syscall) */
  70         pt_reg_t orig_r0;       /* r0 at syscall entry, else zero */
  71         pt_reg_t flags;         /* flags (see below) */
  72 #if !CHIP_HAS_CMPEXCH()
  73         pt_reg_t pad[3];
  74 #else
  75         pt_reg_t cmpexch;       /* value of CMPEXCH_VALUE SPR at interrupt */
  76         pt_reg_t pad[2];
  77 #endif
  78 };
  79
  80 #endif /* __ASSEMBLY__ */
  81
  82 #define PTRACE_GETREGS          12
  83 #define PTRACE_SETREGS          13
  84 #define PTRACE_GETFPREGS        14
  85 #define PTRACE_SETFPREGS        15
  86
  87 /* Support TILE-specific ptrace options, with events starting at 16. */
  88 #define PTRACE_EVENT_MIGRATE    16
  89 #define PTRACE_O_TRACEMIGRATE   (1 << PTRACE_EVENT_MIGRATE)
  90
  91 /*
  92  * Flag bits in pt_regs.flags that are part of the ptrace API.
  93  * We start our numbering higher up to avoid confusion with the
  94  * non-ABI kernel-internal values that use the low 16 bits.
  95  */
  96 #define PT_FLAGS_COMPAT         0x10000  /* process is an -m32 compat process */
  97
  98 #endif /* _UAPI_ASM_TILE_PTRACE_H */