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authorLinus Torvalds <torvalds@woody.osdl.org>2006-12-15 11:43:13 -0500
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-15 11:47:51 -0500
commitd1526e2cda64d5a1de56aef50bad9e5df14245c2 (patch)
treed7b490b1a11dd9720c9918733ca0c06e0e82cfba /include/asm-x86_64/unwind.h
parentd1998ef38a13c4e74c69df55ccd38b0440c429b2 (diff)
Remove stack unwinder for now
It has caused more problems than it ever really solved, and is apparently not getting cleaned up and fixed. We can put it back when it's stable and isn't likely to make warning or bug events worse. In the meantime, enable frame pointers for more readable stack traces. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-x86_64/unwind.h')
-rw-r--r--include/asm-x86_64/unwind.h96
1 files changed, 0 insertions, 96 deletions
diff --git a/include/asm-x86_64/unwind.h b/include/asm-x86_64/unwind.h
index 2f6349e48717..02710f6a4560 100644
--- a/include/asm-x86_64/unwind.h
+++ b/include/asm-x86_64/unwind.h
@@ -1,100 +1,6 @@
1#ifndef _ASM_X86_64_UNWIND_H 1#ifndef _ASM_X86_64_UNWIND_H
2#define _ASM_X86_64_UNWIND_H 2#define _ASM_X86_64_UNWIND_H
3 3
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 */
9
10#ifdef CONFIG_STACK_UNWIND
11
12#include <linux/sched.h>
13#include <asm/ptrace.h>
14#include <asm/uaccess.h>
15#include <asm/vsyscall.h>
16
17struct unwind_frame_info
18{
19 struct pt_regs regs;
20 struct task_struct *task;
21 unsigned call_frame:1;
22};
23
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))
41
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)
60
61#define UNW_DEFAULT_RA(raItem, dataAlign) \
62 ((raItem).where == Memory && \
63 !((raItem).value * (dataAlign) + 8))
64
65static inline void arch_unw_init_frame_info(struct unwind_frame_info *info,
66 /*const*/ struct pt_regs *regs)
67{
68 info->regs = *regs;
69}
70
71static inline void arch_unw_init_blocked(struct unwind_frame_info *info)
72{
73 extern const char thread_return[];
74
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;
81}
82
83extern int arch_unwind_init_running(struct unwind_frame_info *,
84 int (*callback)(struct unwind_frame_info *,
85 void *arg),
86 void *arg);
87
88static inline int arch_unw_user_mode(const struct unwind_frame_info *info)
89{
90 return user_mode(&info->regs)
91 || (long)info->regs.rip >= 0
92 || (info->regs.rip >= VSYSCALL_START && info->regs.rip < VSYSCALL_END)
93 || (long)info->regs.rsp >= 0;
94}
95
96#else
97
98#define UNW_PC(frame) ((void)(frame), 0UL) 4#define UNW_PC(frame) ((void)(frame), 0UL)
99#define UNW_SP(frame) ((void)(frame), 0UL) 5#define UNW_SP(frame) ((void)(frame), 0UL)
100 6
@@ -103,6 +9,4 @@ static inline int arch_unw_user_mode(const void *info)
103 return 0; 9 return 0;
104} 10}
105 11
106#endif
107
108#endif /* _ASM_X86_64_UNWIND_H */ 12#endif /* _ASM_X86_64_UNWIND_H */