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gerrit-public.fairphone.software / kernel / msm-4.9 / 2f8d16a996da0b9be2536994aa7a825418364471 / . / include / asm-i386 / ptrace.h
blob: 6002597b9e12212b8e0986f9b7070d2d0b5ba041 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1#ifndef _I386_PTRACE_H
2#define _I386_PTRACE_H
3
Jeff Dike70e0eb82006-09-25 23:33:09 -0700[diff] [blame]4#include <asm/ptrace-abi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]5
6/* this struct defines the way the registers are stored on the
7 stack during a system call. */
8
9struct pt_regs {
10 long ebx;
11 long ecx;
12 long edx;
13 long esi;
14 long edi;
15 long ebp;
16 long eax;
17 int xds;
18 int xes;
Jeremy Fitzhardinge464d1a72007-02-13 13:26:20 +0100[diff] [blame]19 int xfs;
20 /* int xgs; */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]21 long orig_eax;
22 long eip;
23 int xcs;
24 long eflags;
25 long esp;
26 int xss;
27};
28
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]29#ifdef __KERNEL__
Andrew Morton388b0922005-07-27 11:43:25 -0700[diff] [blame]30
31#include <asm/vm86.h>
Rusty Russell78be3702006-09-26 10:52:39 +0200[diff] [blame]32#include <asm/segment.h>
Andrew Morton388b0922005-07-27 11:43:25 -0700[diff] [blame]33
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]34struct task_struct;
35extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
Chuck Ebbertae6578f2005-07-26 21:57:24 -0400[diff] [blame]36
Zachary Amsden0998e422005-09-03 15:56:43 -0700[diff] [blame]37/*
38 * user_mode_vm(regs) determines whether a register set came from user mode.
39 * This is true if V8086 mode was enabled OR if the register set was from
40 * protected mode with RPL-3 CS value. This tricky test checks that with
41 * one comparison. Many places in the kernel can bypass this full check
42 * if they have already ruled out V8086 mode, so user_mode(regs) can be used.
43 */
Chuck Ebbertae6578f2005-07-26 21:57:24 -0400[diff] [blame]44static inline int user_mode(struct pt_regs *regs)
45{
Rusty Russell78be3702006-09-26 10:52:39 +0200[diff] [blame]46 return (regs->xcs & SEGMENT_RPL_MASK) == USER_RPL;
Chuck Ebbertae6578f2005-07-26 21:57:24 -0400[diff] [blame]47}
48static inline int user_mode_vm(struct pt_regs *regs)
49{
Rusty Russell78be3702006-09-26 10:52:39 +0200[diff] [blame]50 return ((regs->xcs & SEGMENT_RPL_MASK) | (regs->eflags & VM_MASK)) >= USER_RPL;
Chuck Ebbertae6578f2005-07-26 21:57:24 -0400[diff] [blame]51}
Zachary Amsden7b355202007-02-13 13:26:21 +0100[diff] [blame]52static inline int v8086_mode(struct pt_regs *regs)
53{
54 return (regs->eflags & VM_MASK);
55}
Ananth N Mavinakayanahallib3f827c2006-10-02 02:17:31 -0700[diff] [blame]56
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]57#define instruction_pointer(regs) ((regs)->eip)
Ananth N Mavinakayanahallib3f827c2006-10-02 02:17:31 -0700[diff] [blame]58#define regs_return_value(regs) ((regs)->eax)
59
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]60extern unsigned long profile_pc(struct pt_regs *regs);
Chuck Ebbertae6578f2005-07-26 21:57:24 -0400[diff] [blame]61#endif /* __KERNEL__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]62
63#endif