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. */
35 #else /* __KERNEL__ */
58 #include <asm/segment.h>
61 extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
64 * user_mode_vm(regs) determines whether a register set came from user mode.
65 * This is true if V8086 mode was enabled OR if the register set was from
66 * protected mode with RPL-3 CS value. This tricky test checks that with
67 * one comparison. Many places in the kernel can bypass this full check
68 * if they have already ruled out V8086 mode, so user_mode(regs) can be used.
70 static inline int user_mode(struct pt_regs *regs)
72 return (regs->cs & SEGMENT_RPL_MASK) == USER_RPL;
74 static inline int user_mode_vm(struct pt_regs *regs)
76 return ((regs->cs & SEGMENT_RPL_MASK) |
77 (regs->flags & VM_MASK)) >= USER_RPL;
79 static inline int v8086_mode(struct pt_regs *regs)
81 return (regs->flags & VM_MASK);
84 #define instruction_pointer(regs) ((regs)->ip)
85 #define frame_pointer(regs) ((regs)->bp)
86 #define stack_pointer(regs) ((unsigned long)(regs))
87 #define regs_return_value(regs) ((regs)->ax)
89 extern unsigned long profile_pc(struct pt_regs *regs);
90 #endif /* __KERNEL__ */
103 /* arguments: non interrupts/non tracing syscalls only save upto here*/
113 unsigned long orig_rax;
114 /* end of arguments */
115 /* cpu exception frame or undefined */
118 unsigned long eflags;
121 /* top of stack page */
124 #else /* __KERNEL__ */
133 /* arguments: non interrupts/non tracing syscalls only save upto here*/
143 unsigned long orig_ax;
144 /* end of arguments */
145 /* cpu exception frame or undefined */
151 /* top of stack page */
154 #define user_mode(regs) (!!((regs)->cs & 3))
155 #define user_mode_vm(regs) user_mode(regs)
156 #define v8086_mode(regs) 0 /* No V86 mode support in long mode */
157 #define instruction_pointer(regs) ((regs)->ip)
158 #define frame_pointer(regs) ((regs)->bp)
159 #define stack_pointer(regs) ((regs)->sp)
160 #define regs_return_value(regs) ((regs)->ax)
162 extern unsigned long profile_pc(struct pt_regs *regs);
163 void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
167 extern unsigned long ptrace_get_debugreg(struct task_struct *child, int n);
168 extern int ptrace_set_debugreg(struct task_struct *child, int n, unsigned long);
171 convert_rip_to_linear(struct task_struct *child, struct pt_regs *regs);
173 #endif /* __KERNEL__ */
174 #endif /* !__i386__ */
179 * These are defined as per linux/ptrace.h, which see.
181 #define arch_has_single_step() (1)
182 extern void user_enable_single_step(struct task_struct *);
183 extern void user_disable_single_step(struct task_struct *);
185 extern void user_enable_block_step(struct task_struct *);
186 #ifdef CONFIG_X86_DEBUGCTLMSR
187 #define arch_has_block_step() (1)
189 #define arch_has_block_step() (boot_cpu_data.x86 >= 6)
193 extern int do_get_thread_area(struct task_struct *p, int idx,
194 struct user_desc __user *info);
195 extern int do_set_thread_area(struct task_struct *p, int idx,
196 struct user_desc __user *info, int can_allocate);
198 #endif /* __KERNEL__ */
200 #endif /* !__ASSEMBLY__ */