fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-x86 / ptrace_32.h
blob6002597b9e12212b8e0986f9b7070d2d0b5ba041
1 #ifndef _I386_PTRACE_H
2 #define _I386_PTRACE_H
4 #include <asm/ptrace-abi.h>
6 /* this struct defines the way the registers are stored on the
7 stack during a system call. */
9 struct 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 int xfs;
20 /* int xgs; */
21 long orig_eax;
22 long eip;
23 int xcs;
24 long eflags;
25 long esp;
26 int xss;
29 #ifdef __KERNEL__
31 #include <asm/vm86.h>
32 #include <asm/segment.h>
34 struct task_struct;
35 extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
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.
44 static inline int user_mode(struct pt_regs *regs)
46 return (regs->xcs & SEGMENT_RPL_MASK) == USER_RPL;
48 static inline int user_mode_vm(struct pt_regs *regs)
50 return ((regs->xcs & SEGMENT_RPL_MASK) | (regs->eflags & VM_MASK)) >= USER_RPL;
52 static inline int v8086_mode(struct pt_regs *regs)
54 return (regs->eflags & VM_MASK);
57 #define instruction_pointer(regs) ((regs)->eip)
58 #define regs_return_value(regs) ((regs)->eax)
60 extern unsigned long profile_pc(struct pt_regs *regs);
61 #endif /* __KERNEL__ */
63 #endif