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4e00532f37
Having multiple versions of on_accessible_stack() (one per unwinder) makes it very hard to reason about what is used where due to the complexity of the various includes, the forward declarations, and the reliance on everything being 'inline'. Instead, move the code back where it should be. Each unwinder implements: - on_accessible_stack() as well as the helpers it depends on, - unwind()/unwind_next(), as they pass on_accessible_stack as a parameter to unwind_next_common() (which is the only common code here) This hardly results in any duplication, and makes it much easier to reason about the code. Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Kalesh Singh <kaleshsingh@google.com> Tested-by: Kalesh Singh <kaleshsingh@google.com> Reviewed-by: Oliver Upton <oliver.upton@linux.dev> Link: https://lore.kernel.org/r/20220727142906.1856759-4-maz@kernel.org
61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2012 ARM Ltd.
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*/
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#ifndef __ASM_STACKTRACE_H
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#define __ASM_STACKTRACE_H
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#include <linux/percpu.h>
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#include <linux/sched.h>
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#include <linux/sched/task_stack.h>
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#include <linux/llist.h>
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#include <asm/memory.h>
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#include <asm/pointer_auth.h>
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#include <asm/ptrace.h>
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#include <asm/sdei.h>
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#include <asm/stacktrace/common.h>
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extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk,
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const char *loglvl);
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DECLARE_PER_CPU(unsigned long *, irq_stack_ptr);
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static inline bool on_irq_stack(unsigned long sp, unsigned long size,
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struct stack_info *info)
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{
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unsigned long low = (unsigned long)raw_cpu_read(irq_stack_ptr);
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unsigned long high = low + IRQ_STACK_SIZE;
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return on_stack(sp, size, low, high, STACK_TYPE_IRQ, info);
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}
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static inline bool on_task_stack(const struct task_struct *tsk,
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unsigned long sp, unsigned long size,
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struct stack_info *info)
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{
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unsigned long low = (unsigned long)task_stack_page(tsk);
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unsigned long high = low + THREAD_SIZE;
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return on_stack(sp, size, low, high, STACK_TYPE_TASK, info);
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}
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#ifdef CONFIG_VMAP_STACK
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DECLARE_PER_CPU(unsigned long [OVERFLOW_STACK_SIZE/sizeof(long)], overflow_stack);
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static inline bool on_overflow_stack(unsigned long sp, unsigned long size,
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struct stack_info *info)
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{
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unsigned long low = (unsigned long)raw_cpu_ptr(overflow_stack);
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unsigned long high = low + OVERFLOW_STACK_SIZE;
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return on_stack(sp, size, low, high, STACK_TYPE_OVERFLOW, info);
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}
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#else
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static inline bool on_overflow_stack(unsigned long sp, unsigned long size,
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struct stack_info *info) { return false; }
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#endif
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#endif /* __ASM_STACKTRACE_H */
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