mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 07:26:16 +07:00
8b5e99f022
The unwinder warnings are good at finding unexpected unwinder issues, but they often don't give enough data to be able to fully diagnose them. Print a one-time stack dump when a warning is detected. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Andy Lutomirski <luto@amacapital.net> Link: http://lkml.kernel.org/r/15607370e3ddb1732b6a73d5c65937864df16ac8.1481904011.git.jpoimboe@redhat.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
#ifndef _ASM_X86_UNWIND_H
|
|
#define _ASM_X86_UNWIND_H
|
|
|
|
#include <linux/sched.h>
|
|
#include <linux/ftrace.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/stacktrace.h>
|
|
|
|
struct unwind_state {
|
|
struct stack_info stack_info;
|
|
unsigned long stack_mask;
|
|
struct task_struct *task;
|
|
int graph_idx;
|
|
#ifdef CONFIG_FRAME_POINTER
|
|
unsigned long *bp, *orig_sp;
|
|
struct pt_regs *regs;
|
|
#else
|
|
unsigned long *sp;
|
|
#endif
|
|
};
|
|
|
|
void __unwind_start(struct unwind_state *state, struct task_struct *task,
|
|
struct pt_regs *regs, unsigned long *first_frame);
|
|
|
|
bool unwind_next_frame(struct unwind_state *state);
|
|
|
|
unsigned long unwind_get_return_address(struct unwind_state *state);
|
|
|
|
static inline bool unwind_done(struct unwind_state *state)
|
|
{
|
|
return state->stack_info.type == STACK_TYPE_UNKNOWN;
|
|
}
|
|
|
|
static inline
|
|
void unwind_start(struct unwind_state *state, struct task_struct *task,
|
|
struct pt_regs *regs, unsigned long *first_frame)
|
|
{
|
|
first_frame = first_frame ? : get_stack_pointer(task, regs);
|
|
|
|
__unwind_start(state, task, regs, first_frame);
|
|
}
|
|
|
|
#ifdef CONFIG_FRAME_POINTER
|
|
|
|
static inline
|
|
unsigned long *unwind_get_return_address_ptr(struct unwind_state *state)
|
|
{
|
|
if (unwind_done(state))
|
|
return NULL;
|
|
|
|
return state->regs ? &state->regs->ip : state->bp + 1;
|
|
}
|
|
|
|
static inline struct pt_regs *unwind_get_entry_regs(struct unwind_state *state)
|
|
{
|
|
if (unwind_done(state))
|
|
return NULL;
|
|
|
|
return state->regs;
|
|
}
|
|
|
|
#else /* !CONFIG_FRAME_POINTER */
|
|
|
|
static inline
|
|
unsigned long *unwind_get_return_address_ptr(struct unwind_state *state)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct pt_regs *unwind_get_entry_regs(struct unwind_state *state)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
#endif /* CONFIG_FRAME_POINTER */
|
|
|
|
#endif /* _ASM_X86_UNWIND_H */
|