struct super_block;
struct dentry;
struct file_operations;
+struct pt_regs;
/* Operations structure to be filled in */
struct oprofile_operations {
int (*start)(void);
/* Stop delivering interrupts. */
void (*stop)(void);
+ /* Initiate a stack backtrace. Optional. */
+ void (*backtrace)(struct pt_regs * const regs, unsigned int depth);
/* CPU identification string. */
char * cpu_type;
};
/**
* One-time initialisation. *ops must be set to a filled-in
* operations structure. This is called even in timer interrupt
- * mode.
+ * mode so an arch can set a backtrace callback.
*
- * Return 0 on success.
+ * If an error occurs, the fields should be left untouched.
*/
-int oprofile_arch_init(struct oprofile_operations ** ops);
+int oprofile_arch_init(struct oprofile_operations * ops);
/**
* One-time exit/cleanup for the arch.
* Add a sample. This may be called from any context. Pass
* smp_processor_id() as cpu.
*/
-extern void oprofile_add_sample(unsigned long eip, unsigned int is_kernel,
- unsigned long event, int cpu);
+void oprofile_add_sample(struct pt_regs * const regs, unsigned long event);
+
+/* Use this instead when the PC value is not from the regs. Doesn't
+ * backtrace. */
+void oprofile_add_pc(unsigned long pc, int is_kernel, unsigned long event);
+
+/* add a backtrace entry, to be called from the ->backtrace callback */
+void oprofile_add_trace(unsigned long eip);
+
/**
* Create a file of the given name as a child of the given root, with