LXR linux/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. */
  47typedef 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 */
  54struct 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 */
  99