273577165c
On ppc64 we look at a profiling register to work out the sample address and if it was in userspace or kernel. The backtrace interface oprofile_add_sample does not allow this. Create oprofile_add_ext_sample and make oprofile_add_sample use it too. Signed-off-by: Anton Blanchard <anton@samba.org> Cc: Philippe Elie <phil.el@wanadoo.fr> Cc: John Levon <levon@movementarian.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
130 lines
4.0 KiB
C
130 lines
4.0 KiB
C
/**
|
|
* @file oprofile.h
|
|
*
|
|
* API for machine-specific interrupts to interface
|
|
* to oprofile.
|
|
*
|
|
* @remark Copyright 2002 OProfile authors
|
|
* @remark Read the file COPYING
|
|
*
|
|
* @author John Levon <levon@movementarian.org>
|
|
*/
|
|
|
|
#ifndef OPROFILE_H
|
|
#define OPROFILE_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/spinlock.h>
|
|
#include <asm/atomic.h>
|
|
|
|
struct super_block;
|
|
struct dentry;
|
|
struct file_operations;
|
|
struct pt_regs;
|
|
|
|
/* Operations structure to be filled in */
|
|
struct oprofile_operations {
|
|
/* create any necessary configuration files in the oprofile fs.
|
|
* Optional. */
|
|
int (*create_files)(struct super_block * sb, struct dentry * root);
|
|
/* Do any necessary interrupt setup. Optional. */
|
|
int (*setup)(void);
|
|
/* Do any necessary interrupt shutdown. Optional. */
|
|
void (*shutdown)(void);
|
|
/* Start delivering interrupts. */
|
|
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 so an arch can set a backtrace callback.
|
|
*
|
|
* If an error occurs, the fields should be left untouched.
|
|
*/
|
|
int oprofile_arch_init(struct oprofile_operations * ops);
|
|
|
|
/**
|
|
* One-time exit/cleanup for the arch.
|
|
*/
|
|
void oprofile_arch_exit(void);
|
|
|
|
/**
|
|
* Add a sample. This may be called from any context. Pass
|
|
* smp_processor_id() as cpu.
|
|
*/
|
|
void oprofile_add_sample(struct pt_regs * const regs, unsigned long event);
|
|
|
|
/**
|
|
* Add an extended sample. Use this when the PC is not from the regs, and
|
|
* we cannot determine if we're in kernel mode from the regs.
|
|
*
|
|
* This function does perform a backtrace.
|
|
*
|
|
*/
|
|
void oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
|
|
unsigned long event, int is_kernel);
|
|
|
|
/* 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
|
|
* the specified file operations.
|
|
*/
|
|
int oprofilefs_create_file(struct super_block * sb, struct dentry * root,
|
|
char const * name, struct file_operations * fops);
|
|
|
|
int oprofilefs_create_file_perm(struct super_block * sb, struct dentry * root,
|
|
char const * name, struct file_operations * fops, int perm);
|
|
|
|
/** Create a file for read/write access to an unsigned long. */
|
|
int oprofilefs_create_ulong(struct super_block * sb, struct dentry * root,
|
|
char const * name, ulong * val);
|
|
|
|
/** Create a file for read-only access to an unsigned long. */
|
|
int oprofilefs_create_ro_ulong(struct super_block * sb, struct dentry * root,
|
|
char const * name, ulong * val);
|
|
|
|
/** Create a file for read-only access to an atomic_t. */
|
|
int oprofilefs_create_ro_atomic(struct super_block * sb, struct dentry * root,
|
|
char const * name, atomic_t * val);
|
|
|
|
/** create a directory */
|
|
struct dentry * oprofilefs_mkdir(struct super_block * sb, struct dentry * root,
|
|
char const * name);
|
|
|
|
/**
|
|
* Write the given asciz string to the given user buffer @buf, updating *offset
|
|
* appropriately. Returns bytes written or -EFAULT.
|
|
*/
|
|
ssize_t oprofilefs_str_to_user(char const * str, char __user * buf, size_t count, loff_t * offset);
|
|
|
|
/**
|
|
* Convert an unsigned long value into ASCII and copy it to the user buffer @buf,
|
|
* updating *offset appropriately. Returns bytes written or -EFAULT.
|
|
*/
|
|
ssize_t oprofilefs_ulong_to_user(unsigned long val, char __user * buf, size_t count, loff_t * offset);
|
|
|
|
/**
|
|
* Read an ASCII string for a number from a userspace buffer and fill *val on success.
|
|
* Returns 0 on success, < 0 on error.
|
|
*/
|
|
int oprofilefs_ulong_from_user(unsigned long * val, char const __user * buf, size_t count);
|
|
|
|
/** lock for read/write safety */
|
|
extern spinlock_t oprofilefs_lock;
|
|
|
|
#endif /* OPROFILE_H */
|