mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 14:56:47 +07:00
8f14772703
Pull x86 irq updates from Ingo Molnar:
"Here are the main changes in this tree:
- Introduce x86-64 IRQ/exception/debug stack guard pages to detect
stack overflows immediately and deterministically.
- Clean up over a decade worth of cruft accumulated.
The outcome of this should be more clear-cut faults/crashes when any
of the low level x86 CPU stacks overflow, instead of silent memory
corruption and sporadic failures much later on"
* 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits)
x86/irq: Fix outdated comments
x86/irq/64: Remove stack overflow debug code
x86/irq/64: Remap the IRQ stack with guard pages
x86/irq/64: Split the IRQ stack into its own pages
x86/irq/64: Init hardirq_stack_ptr during CPU hotplug
x86/irq/32: Handle irq stack allocation failure proper
x86/irq/32: Invoke irq_ctx_init() from init_IRQ()
x86/irq/64: Rename irq_stack_ptr to hardirq_stack_ptr
x86/irq/32: Rename hard/softirq_stack to hard/softirq_stack_ptr
x86/irq/32: Make irq stack a character array
x86/irq/32: Define IRQ_STACK_SIZE
x86/dumpstack/64: Speedup in_exception_stack()
x86/exceptions: Split debug IST stack
x86/exceptions: Enable IST guard pages
x86/exceptions: Disconnect IST index and stack order
x86/cpu: Remove orig_ist array
x86/cpu: Prepare TSS.IST setup for guard pages
x86/dumpstack/64: Use cpu_entry_area instead of orig_ist
x86/irq/64: Use cpu entry area instead of orig_ist
x86/traps: Use cpu_entry_area instead of orig_ist
...
106 lines
2.5 KiB
C
106 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
|
* Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
|
|
*/
|
|
|
|
#ifndef _ASM_X86_STACKTRACE_H
|
|
#define _ASM_X86_STACKTRACE_H
|
|
|
|
#include <linux/uaccess.h>
|
|
#include <linux/ptrace.h>
|
|
|
|
#include <asm/cpu_entry_area.h>
|
|
#include <asm/switch_to.h>
|
|
|
|
enum stack_type {
|
|
STACK_TYPE_UNKNOWN,
|
|
STACK_TYPE_TASK,
|
|
STACK_TYPE_IRQ,
|
|
STACK_TYPE_SOFTIRQ,
|
|
STACK_TYPE_ENTRY,
|
|
STACK_TYPE_EXCEPTION,
|
|
STACK_TYPE_EXCEPTION_LAST = STACK_TYPE_EXCEPTION + N_EXCEPTION_STACKS-1,
|
|
};
|
|
|
|
struct stack_info {
|
|
enum stack_type type;
|
|
unsigned long *begin, *end, *next_sp;
|
|
};
|
|
|
|
bool in_task_stack(unsigned long *stack, struct task_struct *task,
|
|
struct stack_info *info);
|
|
|
|
bool in_entry_stack(unsigned long *stack, struct stack_info *info);
|
|
|
|
int get_stack_info(unsigned long *stack, struct task_struct *task,
|
|
struct stack_info *info, unsigned long *visit_mask);
|
|
|
|
const char *stack_type_name(enum stack_type type);
|
|
|
|
static inline bool on_stack(struct stack_info *info, void *addr, size_t len)
|
|
{
|
|
void *begin = info->begin;
|
|
void *end = info->end;
|
|
|
|
return (info->type != STACK_TYPE_UNKNOWN &&
|
|
addr >= begin && addr < end &&
|
|
addr + len > begin && addr + len <= end);
|
|
}
|
|
|
|
#ifdef CONFIG_X86_32
|
|
#define STACKSLOTS_PER_LINE 8
|
|
#else
|
|
#define STACKSLOTS_PER_LINE 4
|
|
#endif
|
|
|
|
#ifdef CONFIG_FRAME_POINTER
|
|
static inline unsigned long *
|
|
get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
|
|
{
|
|
if (regs)
|
|
return (unsigned long *)regs->bp;
|
|
|
|
if (task == current)
|
|
return __builtin_frame_address(0);
|
|
|
|
return &((struct inactive_task_frame *)task->thread.sp)->bp;
|
|
}
|
|
#else
|
|
static inline unsigned long *
|
|
get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif /* CONFIG_FRAME_POINTER */
|
|
|
|
static inline unsigned long *
|
|
get_stack_pointer(struct task_struct *task, struct pt_regs *regs)
|
|
{
|
|
if (regs)
|
|
return (unsigned long *)kernel_stack_pointer(regs);
|
|
|
|
if (task == current)
|
|
return __builtin_frame_address(0);
|
|
|
|
return (unsigned long *)task->thread.sp;
|
|
}
|
|
|
|
void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
|
|
unsigned long *stack, char *log_lvl);
|
|
|
|
/* The form of the top of the frame on the stack */
|
|
struct stack_frame {
|
|
struct stack_frame *next_frame;
|
|
unsigned long return_address;
|
|
};
|
|
|
|
struct stack_frame_ia32 {
|
|
u32 next_frame;
|
|
u32 return_address;
|
|
};
|
|
|
|
void show_opcodes(struct pt_regs *regs, const char *loglvl);
|
|
void show_ip(struct pt_regs *regs, const char *loglvl);
|
|
#endif /* _ASM_X86_STACKTRACE_H */
|