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>
6 #include <asm/processor-flags.h>
9 #include <asm/ds.h> /* the DS BTS struct is used for ptrace too */
10 #include <asm/segment.h>
16 /* this struct defines the way the registers are stored on the
17 stack during a system call. */
41 #else /* __KERNEL__ */
55 unsigned long orig_ax;
63 #endif /* __KERNEL__ */
76 /* arguments: non interrupts/non tracing syscalls only save upto here*/
86 unsigned long orig_rax;
87 /* end of arguments */
88 /* cpu exception frame or undefined */
94 /* top of stack page */
97 #else /* __KERNEL__ */
106 /* arguments: non interrupts/non tracing syscalls only save upto here*/
116 unsigned long orig_ax;
117 /* end of arguments */
118 /* cpu exception frame or undefined */
124 /* top of stack page */
127 #endif /* __KERNEL__ */
128 #endif /* !__i386__ */
131 #ifdef CONFIG_X86_PTRACE_BTS
132 /* a branch trace record entry
134 * In order to unify the interface between various processor versions,
135 * we use the below data structure for all processors.
152 /* BTS_TASK_ARRIVES or
157 #endif /* CONFIG_X86_PTRACE_BTS */
161 #include <linux/init.h>
166 #ifdef CONFIG_X86_PTRACE_BTS
167 extern void __cpuinit ptrace_bts_init_intel(struct cpuinfo_x86 *);
168 extern void ptrace_bts_take_timestamp(struct task_struct *, enum bts_qualifier);
170 #define ptrace_bts_init_intel(config) do {} while (0)
171 #endif /* CONFIG_X86_PTRACE_BTS */
173 extern unsigned long profile_pc(struct pt_regs *regs);
176 convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
177 extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
178 int error_code, int si_code);
179 void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
181 extern long syscall_trace_enter(struct pt_regs *);
182 extern void syscall_trace_leave(struct pt_regs *);
184 static inline unsigned long regs_return_value(struct pt_regs *regs)
190 * user_mode_vm(regs) determines whether a register set came from user mode.
191 * This is true if V8086 mode was enabled OR if the register set was from
192 * protected mode with RPL-3 CS value. This tricky test checks that with
193 * one comparison. Many places in the kernel can bypass this full check
194 * if they have already ruled out V8086 mode, so user_mode(regs) can be used.
196 static inline int user_mode(struct pt_regs *regs)
199 return (regs->cs & SEGMENT_RPL_MASK) == USER_RPL;
201 return !!(regs->cs & 3);
205 static inline int user_mode_vm(struct pt_regs *regs)
208 return ((regs->cs & SEGMENT_RPL_MASK) | (regs->flags & X86_VM_MASK)) >=
211 return user_mode(regs);
215 static inline int v8086_mode(struct pt_regs *regs)
218 return (regs->flags & X86_VM_MASK);
220 return 0; /* No V86 mode support in long mode */
225 * X86_32 CPUs don't save ss and esp if the CPU is already in kernel mode
226 * when it traps. So regs will be the current sp.
228 * This is valid only for kernel mode traps.
230 static inline unsigned long kernel_trap_sp(struct pt_regs *regs)
233 return (unsigned long)regs;
239 static inline unsigned long instruction_pointer(struct pt_regs *regs)
244 static inline unsigned long frame_pointer(struct pt_regs *regs)
249 static inline unsigned long user_stack_pointer(struct pt_regs *regs)
255 * These are defined as per linux/ptrace.h, which see.
257 #define arch_has_single_step() (1)
258 extern void user_enable_single_step(struct task_struct *);
259 extern void user_disable_single_step(struct task_struct *);
261 extern void user_enable_block_step(struct task_struct *);
262 #ifdef CONFIG_X86_DEBUGCTLMSR
263 #define arch_has_block_step() (1)
265 #define arch_has_block_step() (boot_cpu_data.x86 >= 6)
269 extern int do_get_thread_area(struct task_struct *p, int idx,
270 struct user_desc __user *info);
271 extern int do_set_thread_area(struct task_struct *p, int idx,
272 struct user_desc __user *info, int can_allocate);
274 #define __ARCH_WANT_COMPAT_SYS_PTRACE
276 #endif /* __KERNEL__ */
278 #endif /* !__ASSEMBLY__ */
280 #endif /* _ASM_X86_PTRACE_H */