1 #ifndef _ASM_X86_PTRACE_H
2 #define _ASM_X86_PTRACE_H
4 #include <linux/compiler.h> /* For __user */
5 #include <asm/ptrace-abi.h>
10 /* this struct defines the way the registers are stored on the
11 stack during a system call. */
36 #include <asm/segment.h>
39 extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
42 * user_mode_vm(regs) determines whether a register set came from user mode.
43 * This is true if V8086 mode was enabled OR if the register set was from
44 * protected mode with RPL-3 CS value. This tricky test checks that with
45 * one comparison. Many places in the kernel can bypass this full check
46 * if they have already ruled out V8086 mode, so user_mode(regs) can be used.
48 static inline int user_mode(struct pt_regs *regs)
50 return (regs->xcs & SEGMENT_RPL_MASK) == USER_RPL;
52 static inline int user_mode_vm(struct pt_regs *regs)
54 return ((regs->xcs & SEGMENT_RPL_MASK) | (regs->eflags & VM_MASK)) >= USER_RPL;
56 static inline int v8086_mode(struct pt_regs *regs)
58 return (regs->eflags & VM_MASK);
61 #define instruction_pointer(regs) ((regs)->eip)
62 #define frame_pointer(regs) ((regs)->ebp)
63 #define stack_pointer(regs) ((unsigned long)(regs))
64 #define regs_return_value(regs) ((regs)->eax)
66 extern unsigned long profile_pc(struct pt_regs *regs);
67 #endif /* __KERNEL__ */
78 /* arguments: non interrupts/non tracing syscalls only save upto here*/
88 unsigned long orig_rax;
89 /* end of arguments */
90 /* cpu exception frame or undefined */
96 /* top of stack page */
101 #define user_mode(regs) (!!((regs)->cs & 3))
102 #define user_mode_vm(regs) user_mode(regs)
103 #define instruction_pointer(regs) ((regs)->rip)
104 #define frame_pointer(regs) ((regs)->rbp)
105 #define stack_pointer(regs) ((regs)->rsp)
106 #define regs_return_value(regs) ((regs)->rax)
108 extern unsigned long profile_pc(struct pt_regs *regs);
109 void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
113 extern unsigned long ptrace_get_debugreg(struct task_struct *child, int n);
114 extern int ptrace_set_debugreg(struct task_struct *child, int n, unsigned long);
117 convert_rip_to_linear(struct task_struct *child, struct pt_regs *regs);
129 EF_IOPL = 0x00003000,
130 EF_IOPL_RING0 = 0x00000000,
131 EF_IOPL_RING1 = 0x00001000,
132 EF_IOPL_RING2 = 0x00002000,
133 EF_NT = 0x00004000, /* nested task */
134 EF_RF = 0x00010000, /* resume */
135 EF_VM = 0x00020000, /* virtual mode */
136 EF_AC = 0x00040000, /* alignment */
137 EF_VIF = 0x00080000, /* virtual interrupt */
138 EF_VIP = 0x00100000, /* virtual interrupt pending */
139 EF_ID = 0x00200000, /* id */
141 #endif /* __KERNEL__ */
142 #endif /* !__i386__ */
147 * These are defined as per linux/ptrace.h, which see.
149 #define arch_has_single_step() (1)
150 extern void user_enable_single_step(struct task_struct *);
151 extern void user_disable_single_step(struct task_struct *);
153 extern void user_enable_block_step(struct task_struct *);
154 #ifdef CONFIG_X86_DEBUGCTLMSR
155 #define arch_has_block_step() (1)
157 #define arch_has_block_step() (boot_cpu_data.x86 >= 6)
161 extern int do_get_thread_area(struct task_struct *p, int idx,
162 struct user_desc __user *info);
163 extern int do_set_thread_area(struct task_struct *p, int idx,
164 struct user_desc __user *info, int can_allocate);
166 #endif /* __KERNEL__ */
168 #endif /* !__ASSEMBLY__ */