From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/x86/include/asm/stacktrace.h | 114 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 114 insertions(+) create mode 100644 arch/x86/include/asm/stacktrace.h (limited to 'arch/x86/include/asm/stacktrace.h') diff --git a/arch/x86/include/asm/stacktrace.h b/arch/x86/include/asm/stacktrace.h new file mode 100644 index 000000000..3881b5333 --- /dev/null +++ b/arch/x86/include/asm/stacktrace.h @@ -0,0 +1,114 @@ +/* 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 +#include + +#include +#include + +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); +bool get_stack_info_noinstr(unsigned long *stack, struct task_struct *task, + struct stack_info *info); + +static __always_inline +bool get_stack_guard_info(unsigned long *stack, struct stack_info *info) +{ + /* make sure it's not in the stack proper */ + if (get_stack_info_noinstr(stack, current, info)) + return false; + /* but if it is in the page below it, we hit a guard */ + return get_stack_info_noinstr((void *)stack + PAGE_SIZE, current, info); +} + +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 *)regs->sp; + + if (task == current) + return __builtin_frame_address(0); + + return (unsigned long *)task->thread.sp; +} + +/* 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 */ -- cgit v1.2.3