f2857ce920
is_prefetch was the last user of get_segment_eip and only on X86_32. This function returned the faulting instruction's address and set the upper segment limit. Instead, use the convert_ip_to_linear helper and rely on probe_kernel_address to do the segment checks which was already done everywhere the segment limit was being checked on X86_32. Remove get_segment_eip as well. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
216 lines
4.7 KiB
C
216 lines
4.7 KiB
C
#ifndef _ASM_X86_PTRACE_H
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#define _ASM_X86_PTRACE_H
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#include <linux/compiler.h> /* For __user */
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#include <asm/ptrace-abi.h>
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#ifndef __ASSEMBLY__
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#ifdef __KERNEL__
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/* the DS BTS struct is used for ptrace as well */
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#include <asm/ds.h>
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struct task_struct;
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extern void ptrace_bts_take_timestamp(struct task_struct *, enum bts_qualifier);
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#endif /* __KERNEL__ */
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#ifdef __i386__
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/* this struct defines the way the registers are stored on the
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stack during a system call. */
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#ifndef __KERNEL__
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struct pt_regs {
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long ebx;
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long ecx;
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long edx;
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long esi;
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long edi;
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long ebp;
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long eax;
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int xds;
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int xes;
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int xfs;
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/* int gs; */
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long orig_eax;
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long eip;
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int xcs;
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long eflags;
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long esp;
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int xss;
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};
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#else /* __KERNEL__ */
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struct pt_regs {
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long bx;
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long cx;
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long dx;
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long si;
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long di;
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long bp;
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long ax;
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int ds;
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int es;
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int fs;
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/* int gs; */
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long orig_ax;
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long ip;
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int cs;
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long flags;
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long sp;
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int ss;
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};
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#include <asm/vm86.h>
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#include <asm/segment.h>
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struct task_struct;
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extern unsigned long
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convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
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extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
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/*
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* user_mode_vm(regs) determines whether a register set came from user mode.
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* This is true if V8086 mode was enabled OR if the register set was from
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* protected mode with RPL-3 CS value. This tricky test checks that with
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* one comparison. Many places in the kernel can bypass this full check
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* if they have already ruled out V8086 mode, so user_mode(regs) can be used.
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*/
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static inline int user_mode(struct pt_regs *regs)
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{
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return (regs->cs & SEGMENT_RPL_MASK) == USER_RPL;
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}
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static inline int user_mode_vm(struct pt_regs *regs)
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{
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return ((regs->cs & SEGMENT_RPL_MASK) |
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(regs->flags & VM_MASK)) >= USER_RPL;
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}
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static inline int v8086_mode(struct pt_regs *regs)
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{
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return (regs->flags & VM_MASK);
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}
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#define instruction_pointer(regs) ((regs)->ip)
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#define frame_pointer(regs) ((regs)->bp)
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#define stack_pointer(regs) ((unsigned long)(regs))
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#define regs_return_value(regs) ((regs)->ax)
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extern unsigned long profile_pc(struct pt_regs *regs);
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#endif /* __KERNEL__ */
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#else /* __i386__ */
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#ifndef __KERNEL__
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struct pt_regs {
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unsigned long r15;
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unsigned long r14;
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unsigned long r13;
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unsigned long r12;
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unsigned long rbp;
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unsigned long rbx;
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/* arguments: non interrupts/non tracing syscalls only save upto here*/
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unsigned long r11;
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unsigned long r10;
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unsigned long r9;
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unsigned long r8;
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unsigned long rax;
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unsigned long rcx;
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unsigned long rdx;
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unsigned long rsi;
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unsigned long rdi;
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unsigned long orig_rax;
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/* end of arguments */
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/* cpu exception frame or undefined */
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unsigned long rip;
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unsigned long cs;
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unsigned long eflags;
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unsigned long rsp;
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unsigned long ss;
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/* top of stack page */
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};
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#else /* __KERNEL__ */
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struct pt_regs {
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unsigned long r15;
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unsigned long r14;
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unsigned long r13;
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unsigned long r12;
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unsigned long bp;
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unsigned long bx;
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/* arguments: non interrupts/non tracing syscalls only save upto here*/
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unsigned long r11;
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unsigned long r10;
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unsigned long r9;
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unsigned long r8;
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unsigned long ax;
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unsigned long cx;
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unsigned long dx;
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unsigned long si;
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unsigned long di;
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unsigned long orig_ax;
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/* end of arguments */
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/* cpu exception frame or undefined */
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unsigned long ip;
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unsigned long cs;
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unsigned long flags;
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unsigned long sp;
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unsigned long ss;
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/* top of stack page */
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};
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#define user_mode(regs) (!!((regs)->cs & 3))
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#define user_mode_vm(regs) user_mode(regs)
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#define v8086_mode(regs) 0 /* No V86 mode support in long mode */
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#define instruction_pointer(regs) ((regs)->ip)
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#define frame_pointer(regs) ((regs)->bp)
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#define stack_pointer(regs) ((regs)->sp)
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#define regs_return_value(regs) ((regs)->ax)
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extern unsigned long profile_pc(struct pt_regs *regs);
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void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
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struct task_struct;
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extern unsigned long
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convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
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#endif /* __KERNEL__ */
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#endif /* !__i386__ */
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#ifdef __KERNEL__
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/*
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* These are defined as per linux/ptrace.h, which see.
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*/
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#define arch_has_single_step() (1)
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extern void user_enable_single_step(struct task_struct *);
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extern void user_disable_single_step(struct task_struct *);
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extern void user_enable_block_step(struct task_struct *);
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#ifdef CONFIG_X86_DEBUGCTLMSR
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#define arch_has_block_step() (1)
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#else
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#define arch_has_block_step() (boot_cpu_data.x86 >= 6)
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#endif
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struct user_desc;
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extern int do_get_thread_area(struct task_struct *p, int idx,
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struct user_desc __user *info);
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extern int do_set_thread_area(struct task_struct *p, int idx,
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struct user_desc __user *info, int can_allocate);
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#endif /* __KERNEL__ */
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#endif /* !__ASSEMBLY__ */
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#endif
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