| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2012 ARM Ltd. |
| */ |
| #ifndef __ASM_STACKTRACE_H |
| #define __ASM_STACKTRACE_H |
| |
| #include <linux/percpu.h> |
| #include <linux/sched.h> |
| #include <linux/sched/task_stack.h> |
| #include <linux/llist.h> |
| |
| #include <asm/memory.h> |
| #include <asm/pointer_auth.h> |
| #include <asm/ptrace.h> |
| #include <asm/sdei.h> |
| |
| #include <asm/stacktrace/common.h> |
| |
| extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk, |
| const char *loglvl); |
| |
| DECLARE_PER_CPU(unsigned long *, irq_stack_ptr); |
| |
| static inline struct stack_info stackinfo_get_irq(void) |
| { |
| unsigned long low = (unsigned long)raw_cpu_read(irq_stack_ptr); |
| unsigned long high = low + IRQ_STACK_SIZE; |
| |
| return (struct stack_info) { |
| .low = low, |
| .high = high, |
| }; |
| } |
| |
| static inline bool on_irq_stack(unsigned long sp, unsigned long size) |
| { |
| struct stack_info info = stackinfo_get_irq(); |
| return stackinfo_on_stack(&info, sp, size); |
| } |
| |
| static inline struct stack_info stackinfo_get_task(const struct task_struct *tsk) |
| { |
| unsigned long low = (unsigned long)task_stack_page(tsk); |
| unsigned long high = low + THREAD_SIZE; |
| |
| return (struct stack_info) { |
| .low = low, |
| .high = high, |
| }; |
| } |
| |
| static inline bool on_task_stack(const struct task_struct *tsk, |
| unsigned long sp, unsigned long size) |
| { |
| struct stack_info info = stackinfo_get_task(tsk); |
| return stackinfo_on_stack(&info, sp, size); |
| } |
| |
| #define on_thread_stack() (on_task_stack(current, current_stack_pointer, 1)) |
| |
| #ifdef CONFIG_VMAP_STACK |
| DECLARE_PER_CPU(unsigned long [OVERFLOW_STACK_SIZE/sizeof(long)], overflow_stack); |
| |
| static inline struct stack_info stackinfo_get_overflow(void) |
| { |
| unsigned long low = (unsigned long)raw_cpu_ptr(overflow_stack); |
| unsigned long high = low + OVERFLOW_STACK_SIZE; |
| |
| return (struct stack_info) { |
| .low = low, |
| .high = high, |
| }; |
| } |
| #else |
| #define stackinfo_get_overflow() stackinfo_get_unknown() |
| #endif |
| |
| #if defined(CONFIG_ARM_SDE_INTERFACE) && defined(CONFIG_VMAP_STACK) |
| DECLARE_PER_CPU(unsigned long *, sdei_stack_normal_ptr); |
| DECLARE_PER_CPU(unsigned long *, sdei_stack_critical_ptr); |
| |
| static inline struct stack_info stackinfo_get_sdei_normal(void) |
| { |
| unsigned long low = (unsigned long)raw_cpu_read(sdei_stack_normal_ptr); |
| unsigned long high = low + SDEI_STACK_SIZE; |
| |
| return (struct stack_info) { |
| .low = low, |
| .high = high, |
| }; |
| } |
| |
| static inline struct stack_info stackinfo_get_sdei_critical(void) |
| { |
| unsigned long low = (unsigned long)raw_cpu_read(sdei_stack_critical_ptr); |
| unsigned long high = low + SDEI_STACK_SIZE; |
| |
| return (struct stack_info) { |
| .low = low, |
| .high = high, |
| }; |
| } |
| #else |
| #define stackinfo_get_sdei_normal() stackinfo_get_unknown() |
| #define stackinfo_get_sdei_critical() stackinfo_get_unknown() |
| #endif |
| |
| #endif /* __ASM_STACKTRACE_H */ |