ARM: 6199/1: Add kprobe-based event tracer
This patch enables the HAVE_REGS_AND_STACK_ACCESS_API option for ARM which is required by the kprobe events tracer. Code based on the PowerPC port. Cc: Jean Pihet <jpihet@mvista.com> Tested-by: Jamie Iles <jamie.iles@picochip.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
committed by
Russell King
parent
eb668c6d06
commit
e513f8bf24
@@ -184,6 +184,42 @@ extern unsigned long profile_pc(struct pt_regs *regs);
|
||||
#define predicate(x) ((x) & 0xf0000000)
|
||||
#define PREDICATE_ALWAYS 0xe0000000
|
||||
|
||||
/*
|
||||
* kprobe-based event tracer support
|
||||
*/
|
||||
#include <linux/stddef.h>
|
||||
#include <linux/types.h>
|
||||
#define MAX_REG_OFFSET (offsetof(struct pt_regs, ARM_ORIG_r0))
|
||||
|
||||
extern int regs_query_register_offset(const char *name);
|
||||
extern const char *regs_query_register_name(unsigned int offset);
|
||||
extern bool regs_within_kernel_stack(struct pt_regs *regs, unsigned long addr);
|
||||
extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
|
||||
unsigned int n);
|
||||
|
||||
/**
|
||||
* regs_get_register() - get register value from its offset
|
||||
* @regs: pt_regs from which register value is gotten
|
||||
* @offset: offset number of the register.
|
||||
*
|
||||
* regs_get_register returns the value of a register whose offset from @regs.
|
||||
* The @offset is the offset of the register in struct pt_regs.
|
||||
* If @offset is bigger than MAX_REG_OFFSET, this returns 0.
|
||||
*/
|
||||
static inline unsigned long regs_get_register(struct pt_regs *regs,
|
||||
unsigned int offset)
|
||||
{
|
||||
if (unlikely(offset > MAX_REG_OFFSET))
|
||||
return 0;
|
||||
return *(unsigned long *)((unsigned long)regs + offset);
|
||||
}
|
||||
|
||||
/* Valid only for Kernel mode traps. */
|
||||
static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
|
||||
{
|
||||
return regs->ARM_sp;
|
||||
}
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
|
||||
#endif /* __ASSEMBLY__ */
|
||||
|
Reference in New Issue
Block a user