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review.evervolv.com / android_kernel_htc_msm8960 / 9b823b43ff308c914530ec7fde5e2d79cb37b51a / . / include / asm-i386 / ptrace.h
blob: d505f501077a67bc77b01729a724b61eb6e26b7a [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;
19 long orig_eax;
20 long eip;
21 int xcs;
22 long eflags;
23 long esp;
24 int xss;
25};
26
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]27#ifdef __KERNEL__
Andrew Morton388b0922005-07-27 11:43:25 -0700[diff] [blame]28
29#include <asm/vm86.h>
Rusty Russell78be3702006-09-26 10:52:39 +0200[diff] [blame]30#include <asm/segment.h>
Andrew Morton388b0922005-07-27 11:43:25 -0700[diff] [blame]31
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]32struct task_struct;
33extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
Chuck Ebbertae6578f2005-07-26 21:57:24 -0400[diff] [blame]34
Zachary Amsden0998e422005-09-03 15:56:43 -0700[diff] [blame]35/*
36 * user_mode_vm(regs) determines whether a register set came from user mode.
37 * This is true if V8086 mode was enabled OR if the register set was from
38 * protected mode with RPL-3 CS value. This tricky test checks that with
39 * one comparison. Many places in the kernel can bypass this full check
40 * if they have already ruled out V8086 mode, so user_mode(regs) can be used.
41 */
Chuck Ebbertae6578f2005-07-26 21:57:24 -0400[diff] [blame]42static inline int user_mode(struct pt_regs *regs)
43{
Rusty Russell78be3702006-09-26 10:52:39 +0200[diff] [blame]44 return (regs->xcs & SEGMENT_RPL_MASK) == USER_RPL;
Chuck Ebbertae6578f2005-07-26 21:57:24 -0400[diff] [blame]45}
46static inline int user_mode_vm(struct pt_regs *regs)
47{
Rusty Russell78be3702006-09-26 10:52:39 +0200[diff] [blame]48 return ((regs->xcs & SEGMENT_RPL_MASK) | (regs->eflags & VM_MASK)) >= USER_RPL;
Chuck Ebbertae6578f2005-07-26 21:57:24 -0400[diff] [blame]49}
Ananth N Mavinakayanahallib3f827c2006-10-02 02:17:31 -0700[diff] [blame]50
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]51#define instruction_pointer(regs) ((regs)->eip)
Ananth N Mavinakayanahallib3f827c2006-10-02 02:17:31 -0700[diff] [blame]52#define regs_return_value(regs) ((regs)->eax)
53
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]54extern unsigned long profile_pc(struct pt_regs *regs);
Chuck Ebbertae6578f2005-07-26 21:57:24 -0400[diff] [blame]55#endif /* __KERNEL__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]56
57#endif