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>

1 files changed, 0 insertions, 91 deletions

diff --git a/include/asm-i386/unwind.h b/include/asm-i386/unwind.h
index aa2c931e30db..43c70c3de2f9 100644
--- a/include/asm-i386/unwind.h
+++ b/include/asm-i386/unwind.h
@@ -1,95 +1,6 @@
 #ifndef _ASM_I386_UNWIND_H
 #define _ASM_I386_UNWIND_H
 
-/*
- * Copyright (C) 2002-2006 Novell, Inc.
- *      Jan Beulich <jbeulich@novell.com>
- * This code is released under version 2 of the GNU GPL.
- */
-
-#ifdef CONFIG_STACK_UNWIND
-
-#include <linux/sched.h>
-#include <asm/fixmap.h>
-#include <asm/ptrace.h>
-#include <asm/uaccess.h>
-
-struct unwind_frame_info
-{
-        struct pt_regs regs;
-        struct task_struct *task;
-        unsigned call_frame:1;
-};
-
-#define UNW_PC(frame)        (frame)->regs.eip
-#define UNW_SP(frame)        (frame)->regs.esp
-#ifdef CONFIG_FRAME_POINTER
-#define UNW_FP(frame)        (frame)->regs.ebp
-#define FRAME_RETADDR_OFFSET 4
-#define FRAME_LINK_OFFSET    0
-#define STACK_BOTTOM(tsk)    STACK_LIMIT((tsk)->thread.esp0)
-#define STACK_TOP(tsk)       ((tsk)->thread.esp0)
-#else
-#define UNW_FP(frame) ((void)(frame), 0)
-#endif
-#define STACK_LIMIT(ptr)     (((ptr) - 1) & ~(THREAD_SIZE - 1))
-
-#define UNW_REGISTER_INFO \
-        PTREGS_INFO(eax), \
-        PTREGS_INFO(ecx), \
-        PTREGS_INFO(edx), \
-        PTREGS_INFO(ebx), \
-        PTREGS_INFO(esp), \
-        PTREGS_INFO(ebp), \
-        PTREGS_INFO(esi), \
-        PTREGS_INFO(edi), \
-        PTREGS_INFO(eip)
-
-#define UNW_DEFAULT_RA(raItem, dataAlign) \
-        ((raItem).where == Memory && \
-         !((raItem).value * (dataAlign) + 4))
-
-static inline void arch_unw_init_frame_info(struct unwind_frame_info *info,
-                                            /*const*/ struct pt_regs *regs)
-{
-        if (user_mode_vm(regs))
-                info->regs = *regs;
-        else {
-                memcpy(&info->regs, regs, offsetof(struct pt_regs, esp));
-                info->regs.esp = (unsigned long)&regs->esp;
-                info->regs.xss = __KERNEL_DS;
-        }
-}
-
-static inline void arch_unw_init_blocked(struct unwind_frame_info *info)
-{
-        memset(&info->regs, 0, sizeof(info->regs));
-        info->regs.eip = info->task->thread.eip;
-        info->regs.xcs = __KERNEL_CS;
-        __get_user(info->regs.ebp, (long *)info->task->thread.esp);
-        info->regs.esp = info->task->thread.esp;
-        info->regs.xss = __KERNEL_DS;
-        info->regs.xds = __USER_DS;
-        info->regs.xes = __USER_DS;
-        info->regs.xgs = __KERNEL_PDA;
-}
-
-extern asmlinkage int arch_unwind_init_running(struct unwind_frame_info *,
-                                               asmlinkage int (*callback)(struct unwind_frame_info *,
-                                                                          void *arg),
-                                               void *arg);
-
-static inline int arch_unw_user_mode(/*const*/ struct unwind_frame_info *info)
-{
-        return user_mode_vm(&info->regs)
-               || info->regs.eip < PAGE_OFFSET
-               || (info->regs.eip >= __fix_to_virt(FIX_VDSO)
-                   && info->regs.eip < __fix_to_virt(FIX_VDSO) + PAGE_SIZE)
-               || info->regs.esp < PAGE_OFFSET;
-}
-
-#else
-
 #define UNW_PC(frame) ((void)(frame), 0)
 #define UNW_SP(frame) ((void)(frame), 0)
 #define UNW_FP(frame) ((void)(frame), 0)
@@ -99,6 +10,4 @@ static inline int arch_unw_user_mode(const void *info)
         return 0;
 }
 
-#endif
-
 #endif /* _ASM_I386_UNWIND_H */