359ad0d401
Tighten the requirements on both input to and output from the Dwarf2 unwinder. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de>
109 lines
3.0 KiB
C
109 lines
3.0 KiB
C
#ifndef _ASM_X86_64_UNWIND_H
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#define _ASM_X86_64_UNWIND_H
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/*
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* Copyright (C) 2002-2006 Novell, Inc.
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* Jan Beulich <jbeulich@novell.com>
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* This code is released under version 2 of the GNU GPL.
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*/
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#ifdef CONFIG_STACK_UNWIND
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#include <linux/sched.h>
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#include <asm/ptrace.h>
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#include <asm/uaccess.h>
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#include <asm/vsyscall.h>
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struct unwind_frame_info
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{
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struct pt_regs regs;
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struct task_struct *task;
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unsigned call_frame:1;
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};
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#define UNW_PC(frame) (frame)->regs.rip
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#define UNW_SP(frame) (frame)->regs.rsp
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#ifdef CONFIG_FRAME_POINTER
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#define UNW_FP(frame) (frame)->regs.rbp
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#define FRAME_RETADDR_OFFSET 8
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#define FRAME_LINK_OFFSET 0
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#define STACK_BOTTOM(tsk) (((tsk)->thread.rsp0 - 1) & ~(THREAD_SIZE - 1))
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#define STACK_TOP(tsk) ((tsk)->thread.rsp0)
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#endif
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/* Might need to account for the special exception and interrupt handling
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stacks here, since normally
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EXCEPTION_STACK_ORDER < THREAD_ORDER < IRQSTACK_ORDER,
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but the construct is needed only for getting across the stack switch to
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the interrupt stack - thus considering the IRQ stack itself is unnecessary,
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and the overhead of comparing against all exception handling stacks seems
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not desirable. */
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#define STACK_LIMIT(ptr) (((ptr) - 1) & ~(THREAD_SIZE - 1))
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#define UNW_REGISTER_INFO \
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PTREGS_INFO(rax), \
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PTREGS_INFO(rdx), \
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PTREGS_INFO(rcx), \
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PTREGS_INFO(rbx), \
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PTREGS_INFO(rsi), \
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PTREGS_INFO(rdi), \
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PTREGS_INFO(rbp), \
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PTREGS_INFO(rsp), \
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PTREGS_INFO(r8), \
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PTREGS_INFO(r9), \
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PTREGS_INFO(r10), \
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PTREGS_INFO(r11), \
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PTREGS_INFO(r12), \
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PTREGS_INFO(r13), \
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PTREGS_INFO(r14), \
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PTREGS_INFO(r15), \
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PTREGS_INFO(rip)
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#define UNW_DEFAULT_RA(raItem, dataAlign) \
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((raItem).where == Memory && \
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!((raItem).value * (dataAlign) + 8))
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static inline void arch_unw_init_frame_info(struct unwind_frame_info *info,
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/*const*/ struct pt_regs *regs)
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{
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info->regs = *regs;
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}
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static inline void arch_unw_init_blocked(struct unwind_frame_info *info)
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{
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extern const char thread_return[];
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memset(&info->regs, 0, sizeof(info->regs));
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info->regs.rip = (unsigned long)thread_return;
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info->regs.cs = __KERNEL_CS;
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__get_user(info->regs.rbp, (unsigned long *)info->task->thread.rsp);
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info->regs.rsp = info->task->thread.rsp;
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info->regs.ss = __KERNEL_DS;
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}
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extern int arch_unwind_init_running(struct unwind_frame_info *,
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int (*callback)(struct unwind_frame_info *,
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void *arg),
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void *arg);
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static inline int arch_unw_user_mode(const struct unwind_frame_info *info)
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{
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return user_mode(&info->regs)
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|| (long)info->regs.rip >= 0
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|| (info->regs.rip >= VSYSCALL_START && info->regs.rip < VSYSCALL_END)
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|| (long)info->regs.rsp >= 0;
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}
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#else
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#define UNW_PC(frame) ((void)(frame), 0UL)
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#define UNW_SP(frame) ((void)(frame), 0UL)
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static inline int arch_unw_user_mode(const void *info)
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{
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return 0;
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}
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#endif
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#endif /* _ASM_X86_64_UNWIND_H */
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