| #ifndef _ASM_X86_PTRACE_H |
| #define _ASM_X86_PTRACE_H |
| |
| #include <linux/compiler.h> /* For __user */ |
| #include <asm/ptrace-abi.h> |
| #include <asm/processor-flags.h> |
| |
| #ifdef __KERNEL__ |
| #include <asm/segment.h> |
| #include <asm/page_types.h> |
| #endif |
| |
| #ifndef __ASSEMBLY__ |
| |
| #ifdef __i386__ |
| /* this struct defines the way the registers are stored on the |
| stack during a system call. */ |
| |
| #ifndef __KERNEL__ |
| |
| struct pt_regs { |
| long ebx; |
| long ecx; |
| long edx; |
| long esi; |
| long edi; |
| long ebp; |
| long eax; |
| int xds; |
| int xes; |
| int xfs; |
| int xgs; |
| long orig_eax; |
| long eip; |
| int xcs; |
| long eflags; |
| long esp; |
| int xss; |
| }; |
| |
| #else /* __KERNEL__ */ |
| |
| struct pt_regs { |
| unsigned long bx; |
| unsigned long cx; |
| unsigned long dx; |
| unsigned long si; |
| unsigned long di; |
| unsigned long bp; |
| unsigned long ax; |
| unsigned long ds; |
| unsigned long es; |
| unsigned long fs; |
| unsigned long gs; |
| unsigned long orig_ax; |
| unsigned long ip; |
| unsigned long cs; |
| unsigned long flags; |
| unsigned long sp; |
| unsigned long ss; |
| }; |
| |
| #endif /* __KERNEL__ */ |
| |
| #else /* __i386__ */ |
| |
| #ifndef __KERNEL__ |
| |
| struct pt_regs { |
| unsigned long r15; |
| unsigned long r14; |
| unsigned long r13; |
| unsigned long r12; |
| unsigned long rbp; |
| unsigned long rbx; |
| /* arguments: non interrupts/non tracing syscalls only save up to here*/ |
| unsigned long r11; |
| unsigned long r10; |
| unsigned long r9; |
| unsigned long r8; |
| unsigned long rax; |
| unsigned long rcx; |
| unsigned long rdx; |
| unsigned long rsi; |
| unsigned long rdi; |
| unsigned long orig_rax; |
| /* end of arguments */ |
| /* cpu exception frame or undefined */ |
| unsigned long rip; |
| unsigned long cs; |
| unsigned long eflags; |
| unsigned long rsp; |
| unsigned long ss; |
| /* top of stack page */ |
| }; |
| |
| #else /* __KERNEL__ */ |
| |
| struct pt_regs { |
| unsigned long r15; |
| unsigned long r14; |
| unsigned long r13; |
| unsigned long r12; |
| unsigned long bp; |
| unsigned long bx; |
| /* arguments: non interrupts/non tracing syscalls only save up to here*/ |
| unsigned long r11; |
| unsigned long r10; |
| unsigned long r9; |
| unsigned long r8; |
| unsigned long ax; |
| unsigned long cx; |
| unsigned long dx; |
| unsigned long si; |
| unsigned long di; |
| unsigned long orig_ax; |
| /* end of arguments */ |
| /* cpu exception frame or undefined */ |
| unsigned long ip; |
| unsigned long cs; |
| unsigned long flags; |
| unsigned long sp; |
| unsigned long ss; |
| /* top of stack page */ |
| }; |
| |
| #endif /* __KERNEL__ */ |
| #endif /* !__i386__ */ |
| |
| |
| #ifdef __KERNEL__ |
| |
| #include <linux/init.h> |
| |
| struct cpuinfo_x86; |
| struct task_struct; |
| |
| extern unsigned long profile_pc(struct pt_regs *regs); |
| |
| extern unsigned long |
| convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs); |
| extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, |
| int error_code, int si_code); |
| void signal_fault(struct pt_regs *regs, void __user *frame, char *where); |
| |
| extern long syscall_trace_enter(struct pt_regs *); |
| extern void syscall_trace_leave(struct pt_regs *); |
| |
| static inline unsigned long regs_return_value(struct pt_regs *regs) |
| { |
| return regs->ax; |
| } |
| |
| /* |
| * user_mode_vm(regs) determines whether a register set came from user mode. |
| * This is true if V8086 mode was enabled OR if the register set was from |
| * protected mode with RPL-3 CS value. This tricky test checks that with |
| * one comparison. Many places in the kernel can bypass this full check |
| * if they have already ruled out V8086 mode, so user_mode(regs) can be used. |
| */ |
| static inline int user_mode(struct pt_regs *regs) |
| { |
| #ifdef CONFIG_X86_32 |
| return (regs->cs & SEGMENT_RPL_MASK) == USER_RPL; |
| #else |
| return !!(regs->cs & 3); |
| #endif |
| } |
| |
| static inline int user_mode_vm(struct pt_regs *regs) |
| { |
| #ifdef CONFIG_X86_32 |
| return ((regs->cs & SEGMENT_RPL_MASK) | (regs->flags & X86_VM_MASK)) >= |
| USER_RPL; |
| #else |
| return user_mode(regs); |
| #endif |
| } |
| |
| static inline int v8086_mode(struct pt_regs *regs) |
| { |
| #ifdef CONFIG_X86_32 |
| return (regs->flags & X86_VM_MASK); |
| #else |
| return 0; /* No V86 mode support in long mode */ |
| #endif |
| } |
| |
| /* |
| * X86_32 CPUs don't save ss and esp if the CPU is already in kernel mode |
| * when it traps. The previous stack will be directly underneath the saved |
| * registers, and 'sp/ss' won't even have been saved. Thus the '®s->sp'. |
| * |
| * This is valid only for kernel mode traps. |
| */ |
| static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) |
| { |
| #ifdef CONFIG_X86_32 |
| return (unsigned long)(®s->sp); |
| #else |
| return regs->sp; |
| #endif |
| } |
| |
| static inline unsigned long instruction_pointer(struct pt_regs *regs) |
| { |
| return regs->ip; |
| } |
| |
| static inline unsigned long frame_pointer(struct pt_regs *regs) |
| { |
| return regs->bp; |
| } |
| |
| static inline unsigned long user_stack_pointer(struct pt_regs *regs) |
| { |
| return regs->sp; |
| } |
| |
| /* Query offset/name of register from its name/offset */ |
| extern int regs_query_register_offset(const char *name); |
| extern const char *regs_query_register_name(unsigned int offset); |
| #define MAX_REG_OFFSET (offsetof(struct pt_regs, ss)) |
| |
| /** |
| * regs_get_register() - get register value from its offset |
| * @regs: pt_regs from which register value is gotten. |
| * @offset: offset number of the register. |
| * |
| * regs_get_register returns the value of a register. The @offset is the |
| * offset of the register in struct pt_regs address which specified by @regs. |
| * If @offset is bigger than MAX_REG_OFFSET, this returns 0. |
| */ |
| static inline unsigned long regs_get_register(struct pt_regs *regs, |
| unsigned int offset) |
| { |
| if (unlikely(offset > MAX_REG_OFFSET)) |
| return 0; |
| return *(unsigned long *)((unsigned long)regs + offset); |
| } |
| |
| /** |
| * regs_within_kernel_stack() - check the address in the stack |
| * @regs: pt_regs which contains kernel stack pointer. |
| * @addr: address which is checked. |
| * |
| * regs_within_kernel_stack() checks @addr is within the kernel stack page(s). |
| * If @addr is within the kernel stack, it returns true. If not, returns false. |
| */ |
| static inline int regs_within_kernel_stack(struct pt_regs *regs, |
| unsigned long addr) |
| { |
| return ((addr & ~(THREAD_SIZE - 1)) == |
| (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1))); |
| } |
| |
| /** |
| * regs_get_kernel_stack_nth() - get Nth entry of the stack |
| * @regs: pt_regs which contains kernel stack pointer. |
| * @n: stack entry number. |
| * |
| * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which |
| * is specified by @regs. If the @n th entry is NOT in the kernel stack, |
| * this returns 0. |
| */ |
| static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, |
| unsigned int n) |
| { |
| unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs); |
| addr += n; |
| if (regs_within_kernel_stack(regs, (unsigned long)addr)) |
| return *addr; |
| else |
| return 0; |
| } |
| |
| #define arch_has_single_step() (1) |
| #ifdef CONFIG_X86_DEBUGCTLMSR |
| #define arch_has_block_step() (1) |
| #else |
| #define arch_has_block_step() (boot_cpu_data.x86 >= 6) |
| #endif |
| |
| #define ARCH_HAS_USER_SINGLE_STEP_INFO |
| |
| struct user_desc; |
| extern int do_get_thread_area(struct task_struct *p, int idx, |
| struct user_desc __user *info); |
| extern int do_set_thread_area(struct task_struct *p, int idx, |
| struct user_desc __user *info, int can_allocate); |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #endif /* _ASM_X86_PTRACE_H */ |