IB/mthca: Query port fix
[linux-2.6/verdex.git] / include / asm-x86_64 / unwind.h
blob2e7ff10fd7751db2e967101c4b7749ad32b7f3a8
1 #ifndef _ASM_X86_64_UNWIND_H
2 #define _ASM_X86_64_UNWIND_H
4 /*
5 * Copyright (C) 2002-2006 Novell, Inc.
6 * Jan Beulich <jbeulich@novell.com>
7 * This code is released under version 2 of the GNU GPL.
8 */
10 #ifdef CONFIG_STACK_UNWIND
12 #include <linux/sched.h>
13 #include <asm/ptrace.h>
14 #include <asm/uaccess.h>
15 #include <asm/vsyscall.h>
17 struct unwind_frame_info
19 struct pt_regs regs;
20 struct task_struct *task;
21 unsigned call_frame:1;
24 #define UNW_PC(frame) (frame)->regs.rip
25 #define UNW_SP(frame) (frame)->regs.rsp
26 #ifdef CONFIG_FRAME_POINTER
27 #define UNW_FP(frame) (frame)->regs.rbp
28 #define FRAME_RETADDR_OFFSET 8
29 #define FRAME_LINK_OFFSET 0
30 #define STACK_BOTTOM(tsk) (((tsk)->thread.rsp0 - 1) & ~(THREAD_SIZE - 1))
31 #define STACK_TOP(tsk) ((tsk)->thread.rsp0)
32 #endif
33 /* Might need to account for the special exception and interrupt handling
34 stacks here, since normally
35 EXCEPTION_STACK_ORDER < THREAD_ORDER < IRQSTACK_ORDER,
36 but the construct is needed only for getting across the stack switch to
37 the interrupt stack - thus considering the IRQ stack itself is unnecessary,
38 and the overhead of comparing against all exception handling stacks seems
39 not desirable. */
40 #define STACK_LIMIT(ptr) (((ptr) - 1) & ~(THREAD_SIZE - 1))
42 #define UNW_REGISTER_INFO \
43 PTREGS_INFO(rax), \
44 PTREGS_INFO(rdx), \
45 PTREGS_INFO(rcx), \
46 PTREGS_INFO(rbx), \
47 PTREGS_INFO(rsi), \
48 PTREGS_INFO(rdi), \
49 PTREGS_INFO(rbp), \
50 PTREGS_INFO(rsp), \
51 PTREGS_INFO(r8), \
52 PTREGS_INFO(r9), \
53 PTREGS_INFO(r10), \
54 PTREGS_INFO(r11), \
55 PTREGS_INFO(r12), \
56 PTREGS_INFO(r13), \
57 PTREGS_INFO(r14), \
58 PTREGS_INFO(r15), \
59 PTREGS_INFO(rip)
61 #define UNW_DEFAULT_RA(raItem, dataAlign) \
62 ((raItem).where == Memory && \
63 !((raItem).value * (dataAlign) + 8))
65 static inline void arch_unw_init_frame_info(struct unwind_frame_info *info,
66 /*const*/ struct pt_regs *regs)
68 info->regs = *regs;
71 static inline void arch_unw_init_blocked(struct unwind_frame_info *info)
73 extern const char thread_return[];
75 memset(&info->regs, 0, sizeof(info->regs));
76 info->regs.rip = (unsigned long)thread_return;
77 info->regs.cs = __KERNEL_CS;
78 __get_user(info->regs.rbp, (unsigned long *)info->task->thread.rsp);
79 info->regs.rsp = info->task->thread.rsp;
80 info->regs.ss = __KERNEL_DS;
83 extern int arch_unwind_init_running(struct unwind_frame_info *,
84 int (*callback)(struct unwind_frame_info *,
85 void *arg),
86 void *arg);
88 static inline int arch_unw_user_mode(const struct unwind_frame_info *info)
90 #if 0 /* This can only work when selector register saves/restores
91 are properly annotated (and tracked in UNW_REGISTER_INFO). */
92 return user_mode(&info->regs);
93 #else
94 return (long)info->regs.rip >= 0
95 || (info->regs.rip >= VSYSCALL_START && info->regs.rip < VSYSCALL_END)
96 || (long)info->regs.rsp >= 0;
97 #endif
100 #else
102 #define UNW_PC(frame) ((void)(frame), 0UL)
103 #define UNW_SP(frame) ((void)(frame), 0UL)
105 static inline int arch_unw_user_mode(const void *info)
107 return 0;
110 #endif
112 #endif /* _ASM_X86_64_UNWIND_H */