include/asm-x86/ptrace.h

   1 #ifndef _ASM_X86_PTRACE_H
   2 #define _ASM_X86_PTRACE_H
   3
   4 #include <linux/compiler.h>     /* For __user */
   5 #include <asm/ptrace-abi.h>
   6
   7
   8 #ifndef __ASSEMBLY__
   9
  10 #ifdef __i386__
  11 /* this struct defines the way the registers are stored on the
  12    stack during a system call. */
  13
  14 #ifndef __KERNEL__
  15
  16 struct pt_regs {
  17         long ebx;
  18         long ecx;
  19         long edx;
  20         long esi;
  21         long edi;
  22         long ebp;
  23         long eax;
  24         int  xds;
  25         int  xes;
  26         int  xfs;
  27         /* int  gs; */
  28         long orig_eax;
  29         long eip;
  30         int  xcs;
  31         long eflags;
  32         long esp;
  33         int  xss;
  34 };
  35
  36 #else /* __KERNEL__ */
  37
  38 struct pt_regs {
  39         long bx;
  40         long cx;
  41         long dx;
  42         long si;
  43         long di;
  44         long bp;
  45         long ax;
  46         int  ds;
  47         int  es;
  48         int  fs;
  49         /* int  gs; */
  50         long orig_ax;
  51         long ip;
  52         int  cs;
  53         long flags;
  54         long sp;
  55         int  ss;
  56 };
  57
  58 #include <asm/vm86.h>
  59 #include <asm/segment.h>
  60
  61 #endif /* __KERNEL__ */
  62
  63 #else /* __i386__ */
  64
  65 #ifndef __KERNEL__
  66
  67 struct pt_regs {
  68         unsigned long r15;
  69         unsigned long r14;
  70         unsigned long r13;
  71         unsigned long r12;
  72         unsigned long rbp;
  73         unsigned long rbx;
  74 /* arguments: non interrupts/non tracing syscalls only save upto here*/
  75         unsigned long r11;
  76         unsigned long r10;
  77         unsigned long r9;
  78         unsigned long r8;
  79         unsigned long rax;
  80         unsigned long rcx;
  81         unsigned long rdx;
  82         unsigned long rsi;
  83         unsigned long rdi;
  84         unsigned long orig_rax;
  85 /* end of arguments */
  86 /* cpu exception frame or undefined */
  87         unsigned long rip;
  88         unsigned long cs;
  89         unsigned long eflags;
  90         unsigned long rsp;
  91         unsigned long ss;
  92 /* top of stack page */
  93 };
  94
  95 #else /* __KERNEL__ */
  96
  97 struct pt_regs {
  98         unsigned long r15;
  99         unsigned long r14;
 100         unsigned long r13;
 101         unsigned long r12;
 102         unsigned long bp;
 103         unsigned long bx;
 104 /* arguments: non interrupts/non tracing syscalls only save upto here*/
 105         unsigned long r11;
 106         unsigned long r10;
 107         unsigned long r9;
 108         unsigned long r8;
 109         unsigned long ax;
 110         unsigned long cx;
 111         unsigned long dx;
 112         unsigned long si;
 113         unsigned long di;
 114         unsigned long orig_ax;
 115 /* end of arguments */
 116 /* cpu exception frame or undefined */
 117         unsigned long ip;
 118         unsigned long cs;
 119         unsigned long flags;
 120         unsigned long sp;
 121         unsigned long ss;
 122 /* top of stack page */
 123 };
 124
 125 #endif /* __KERNEL__ */
 126 #endif /* !__i386__ */
 127
 128 #ifdef __KERNEL__
 129
 130 /* the DS BTS struct is used for ptrace as well */
 131 #include <asm/ds.h>
 132
 133 struct task_struct;
 134
 135 extern void ptrace_bts_take_timestamp(struct task_struct *, enum bts_qualifier);
 136
 137 extern unsigned long profile_pc(struct pt_regs *regs);
 138
 139 extern unsigned long
 140 convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
 141
 142 #ifdef CONFIG_X86_32
 143 extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
 144 #else
 145 void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
 146 #endif
 147
 148 #define regs_return_value(regs) ((regs)->ax)
 149
 150 /*
 151  * user_mode_vm(regs) determines whether a register set came from user mode.
 152  * This is true if V8086 mode was enabled OR if the register set was from
 153  * protected mode with RPL-3 CS value.  This tricky test checks that with
 154  * one comparison.  Many places in the kernel can bypass this full check
 155  * if they have already ruled out V8086 mode, so user_mode(regs) can be used.
 156  */
 157 static inline int user_mode(struct pt_regs *regs)
 158 {
 159 #ifdef CONFIG_X86_32
 160         return (regs->cs & SEGMENT_RPL_MASK) == USER_RPL;
 161 #else
 162         return !!(regs->cs & 3);
 163 #endif
 164 }
 165
 166 static inline int user_mode_vm(struct pt_regs *regs)
 167 {
 168 #ifdef CONFIG_X86_32
 169         return ((regs->cs & SEGMENT_RPL_MASK) |
 170                 (regs->flags & VM_MASK)) >= USER_RPL;
 171 #else
 172         return user_mode(regs);
 173 #endif
 174 }
 175
 176 static inline int v8086_mode(struct pt_regs *regs)
 177 {
 178 #ifdef CONFIG_X86_32
 179         return (regs->flags & VM_MASK);
 180 #else
 181         return 0;       /* No V86 mode support in long mode */
 182 #endif
 183 }
 184
 185 /*
 186  * X86_32 CPUs don't save ss and esp if the CPU is already in kernel mode
 187  * when it traps.  So regs will be the current sp.
 188  *
 189  * This is valid only for kernel mode traps.
 190  */
 191 static inline unsigned long kernel_trap_sp(struct pt_regs *regs)
 192 {
 193 #ifdef CONFIG_X86_32
 194         return (unsigned long)regs;
 195 #else
 196         return regs->sp;
 197 #endif
 198 }
 199
 200 static inline unsigned long instruction_pointer(struct pt_regs *regs)
 201 {
 202         return regs->ip;
 203 }
 204
 205 static inline unsigned long frame_pointer(struct pt_regs *regs)
 206 {
 207         return regs->bp;
 208 }
 209
 210 /*
 211  * These are defined as per linux/ptrace.h, which see.
 212  */
 213 #define arch_has_single_step()  (1)
 214 extern void user_enable_single_step(struct task_struct *);
 215 extern void user_disable_single_step(struct task_struct *);
 216
 217 extern void user_enable_block_step(struct task_struct *);
 218 #ifdef CONFIG_X86_DEBUGCTLMSR
 219 #define arch_has_block_step()   (1)
 220 #else
 221 #define arch_has_block_step()   (boot_cpu_data.x86 >= 6)
 222 #endif
 223
 224 struct user_desc;
 225 extern int do_get_thread_area(struct task_struct *p, int idx,
 226                               struct user_desc __user *info);
 227 extern int do_set_thread_area(struct task_struct *p, int idx,
 228                               struct user_desc __user *info, int can_allocate);
 229
 230 #endif /* __KERNEL__ */
 231
 232 #endif /* !__ASSEMBLY__ */
 233
 234 #endif