add ax88772C AX88772C_eeprom_tools

hc

2024-05-10 61598093bbdd283a7edc367d900f223070ead8d2

 kernel/include/linux/stacktrace.h
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@@ -3,15 +3,65 @@
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 #define __LINUX_STACKTRACE_H
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 #include <linux/types.h>
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+#include <asm/errno.h>
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 struct task_struct;
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 struct pt_regs;
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 #ifdef CONFIG_STACKTRACE
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+void stack_trace_print(const unsigned long *trace, unsigned int nr_entries,
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+		       int spaces);
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+int stack_trace_snprint(char *buf, size_t size, const unsigned long *entries,
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+			unsigned int nr_entries, int spaces);
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+unsigned int stack_trace_save(unsigned long *store, unsigned int size,
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+			      unsigned int skipnr);
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+unsigned int stack_trace_save_tsk(struct task_struct *task,
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+				  unsigned long *store, unsigned int size,
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+				  unsigned int skipnr);
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+unsigned int stack_trace_save_regs(struct pt_regs *regs, unsigned long *store,
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+				   unsigned int size, unsigned int skipnr);
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+unsigned int stack_trace_save_user(unsigned long *store, unsigned int size);
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+
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+/* Internal interfaces. Do not use in generic code */
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+#ifdef CONFIG_ARCH_STACKWALK
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+
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+/**
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+ * stack_trace_consume_fn - Callback for arch_stack_walk()
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+ * @cookie:	Caller supplied pointer handed back by arch_stack_walk()
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+ * @addr:	The stack entry address to consume
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+ *
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+ * Return:	True, if the entry was consumed or skipped
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+ *		False, if there is no space left to store
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+ */
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+typedef bool (*stack_trace_consume_fn)(void *cookie, unsigned long addr);
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+/**
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+ * arch_stack_walk - Architecture specific function to walk the stack
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+ * @consume_entry:	Callback which is invoked by the architecture code for
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+ *			each entry.
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+ * @cookie:		Caller supplied pointer which is handed back to
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+ *			@consume_entry
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+ * @task:		Pointer to a task struct, can be NULL
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+ * @regs:		Pointer to registers, can be NULL
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+ *
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+ * ============ ======= ============================================
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+ * task	        regs
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+ * ============ ======= ============================================
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+ * task		NULL	Stack trace from task (can be current)
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+ * current	regs	Stack trace starting on regs->stackpointer
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+ * ============ ======= ============================================
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+ */
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+void arch_stack_walk(stack_trace_consume_fn consume_entry, void *cookie,
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+		     struct task_struct *task, struct pt_regs *regs);
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+int arch_stack_walk_reliable(stack_trace_consume_fn consume_entry, void *cookie,
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+			     struct task_struct *task);
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+void arch_stack_walk_user(stack_trace_consume_fn consume_entry, void *cookie,
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+			  const struct pt_regs *regs);
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+
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+#else /* CONFIG_ARCH_STACKWALK */
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 struct stack_trace {
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 	unsigned int nr_entries, max_entries;
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 	unsigned long *entries;
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-	int skip;	/* input argument: How many entries to skip */
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+	unsigned int skip;	/* input argument: How many entries to skip */
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 };
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 extern void save_stack_trace(struct stack_trace *trace);
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@@ -21,24 +71,20 @@
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 				struct stack_trace *trace);
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 extern int save_stack_trace_tsk_reliable(struct task_struct *tsk,
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 					 struct stack_trace *trace);
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-
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-extern void print_stack_trace(struct stack_trace *trace, int spaces);
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-extern int snprint_stack_trace(char *buf, size_t size,
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-			struct stack_trace *trace, int spaces);
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-
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-#ifdef CONFIG_USER_STACKTRACE_SUPPORT
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 extern void save_stack_trace_user(struct stack_trace *trace);
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-#else
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-# define save_stack_trace_user(trace)              do { } while (0)
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-#endif
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-
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-#else /* !CONFIG_STACKTRACE */
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-# define save_stack_trace(trace)			do { } while (0)
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-# define save_stack_trace_tsk(tsk, trace)		do { } while (0)
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-# define save_stack_trace_user(trace)			do { } while (0)
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-# define print_stack_trace(trace, spaces)		do { } while (0)
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-# define snprint_stack_trace(buf, size, trace, spaces)	do { } while (0)
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-# define save_stack_trace_tsk_reliable(tsk, trace)	({ -ENOSYS; })
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+#endif /* !CONFIG_ARCH_STACKWALK */
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 #endif /* CONFIG_STACKTRACE */
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+#if defined(CONFIG_STACKTRACE) && defined(CONFIG_HAVE_RELIABLE_STACKTRACE)
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+int stack_trace_save_tsk_reliable(struct task_struct *tsk, unsigned long *store,
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+				  unsigned int size);
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+#else
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+static inline int stack_trace_save_tsk_reliable(struct task_struct *tsk,
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+						unsigned long *store,
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+						unsigned int size)
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+{
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+	return -ENOSYS;
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+}
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+#endif
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+
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 #endif /* __LINUX_STACKTRACE_H */