arch/mips/include/asm/ptrace.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000 by Ralf Baechle
   7  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
   8  */
   9 #ifndef _ASM_PTRACE_H
  10 #define _ASM_PTRACE_H
  11
  12 /* 0 - 31 are integer registers, 32 - 63 are fp registers.  */
  13 #define FPR_BASE        32
  14 #define PC              64
  15 #define CAUSE           65
  16 #define BADVADDR        66
  17 #define MMHI            67
  18 #define MMLO            68
  19 #define FPC_CSR         69
  20 #define FPC_EIR         70
  21 #define DSP_BASE        71              /* 3 more hi / lo register pairs */
  22 #define DSP_CONTROL     77
  23 #define ACX             78
  24
  25 /*
  26  * This struct defines the way the registers are stored on the stack during a
  27  * system call/exception. As usual the registers k0/k1 aren't being saved.
  28  */
  29 struct pt_regs {
  30 #ifdef CONFIG_32BIT
  31         /* Pad bytes for argument save space on the stack. */
  32         unsigned long pad0[6];
  33 #endif
  34
  35         /* Saved main processor registers. */
  36         unsigned long regs[32];
  37
  38         /* Saved special registers. */
  39         unsigned long cp0_status;
  40         unsigned long hi;
  41         unsigned long lo;
  42 #ifdef CONFIG_CPU_HAS_SMARTMIPS
  43         unsigned long acx;
  44 #endif
  45         unsigned long cp0_badvaddr;
  46         unsigned long cp0_cause;
  47         unsigned long cp0_epc;
  48 #ifdef CONFIG_MIPS_MT_SMTC
  49         unsigned long cp0_tcstatus;
  50 #endif /* CONFIG_MIPS_MT_SMTC */
  51 } __attribute__ ((aligned (8)));
  52
  53 /* Arbitrarily choose the same ptrace numbers as used by the Sparc code. */
  54 #define PTRACE_GETREGS          12
  55 #define PTRACE_SETREGS          13
  56 #define PTRACE_GETFPREGS                14
  57 #define PTRACE_SETFPREGS                15
  58 /* #define PTRACE_GETFPXREGS            18 */
  59 /* #define PTRACE_SETFPXREGS            19 */
  60
  61 #define PTRACE_OLDSETOPTIONS    21
  62
  63 #define PTRACE_GET_THREAD_AREA  25
  64 #define PTRACE_SET_THREAD_AREA  26
  65
  66 /* Calls to trace a 64bit program from a 32bit program.  */
  67 #define PTRACE_PEEKTEXT_3264    0xc0
  68 #define PTRACE_PEEKDATA_3264    0xc1
  69 #define PTRACE_POKETEXT_3264    0xc2
  70 #define PTRACE_POKEDATA_3264    0xc3
  71 #define PTRACE_GET_THREAD_AREA_3264     0xc4
  72
  73 /* Read and write watchpoint registers.  */
  74 enum pt_watch_style {
  75         pt_watch_style_mips32,
  76         pt_watch_style_mips64
  77 };
  78 struct mips32_watch_regs {
  79         unsigned int watchlo[8];
  80         /* Lower 16 bits of watchhi. */
  81         unsigned short watchhi[8];
  82         /* Valid mask and I R W bits.
  83          * bit 0 -- 1 if W bit is usable.
  84          * bit 1 -- 1 if R bit is usable.
  85          * bit 2 -- 1 if I bit is usable.
  86          * bits 3 - 11 -- Valid watchhi mask bits.
  87          */
  88         unsigned short watch_masks[8];
  89         /* The number of valid watch register pairs.  */
  90         unsigned int num_valid;
  91 } __attribute__((aligned(8)));
  92
  93 struct mips64_watch_regs {
  94         unsigned long long watchlo[8];
  95         unsigned short watchhi[8];
  96         unsigned short watch_masks[8];
  97         unsigned int num_valid;
  98 } __attribute__((aligned(8)));
  99
 100 struct pt_watch_regs {
 101         enum pt_watch_style style;
 102         union {
 103                 struct mips32_watch_regs mips32;
 104                 struct mips32_watch_regs mips64;
 105         };
 106 };
 107
 108 #define PTRACE_GET_WATCH_REGS   0xd0
 109 #define PTRACE_SET_WATCH_REGS   0xd1
 110
 111 #ifdef __KERNEL__
 112
 113 #include <linux/compiler.h>
 114 #include <linux/linkage.h>
 115 #include <linux/types.h>
 116 #include <asm/isadep.h>
 117
 118 struct task_struct;
 119
 120 extern int ptrace_getregs(struct task_struct *child, __s64 __user *data);
 121 extern int ptrace_setregs(struct task_struct *child, __s64 __user *data);
 122
 123 extern int ptrace_getfpregs(struct task_struct *child, __u32 __user *data);
 124 extern int ptrace_setfpregs(struct task_struct *child, __u32 __user *data);
 125
 126 extern int ptrace_get_watch_regs(struct task_struct *child,
 127         struct pt_watch_regs __user *addr);
 128 extern int ptrace_set_watch_regs(struct task_struct *child,
 129         struct pt_watch_regs __user *addr);
 130
 131 /*
 132  * Does the process account for user or for system time?
 133  */
 134 #define user_mode(regs) (((regs)->cp0_status & KU_MASK) == KU_USER)
 135
 136 #define instruction_pointer(regs) ((regs)->cp0_epc)
 137 #define profile_pc(regs) instruction_pointer(regs)
 138
 139 extern asmlinkage void do_syscall_trace(struct pt_regs *regs, int entryexit);
 140
 141 extern NORET_TYPE void die(const char *, const struct pt_regs *) ATTRIB_NORET;
 142
 143 static inline void die_if_kernel(const char *str, const struct pt_regs *regs)
 144 {
 145         if (unlikely(!user_mode(regs)))
 146                 die(str, regs);
 147 }
 148
 149 #endif
 150
 151 #endif /* _ASM_PTRACE_H */