ptrace.h File Reference

#include <linux/compiler.h>
#include <uapi/asm/ptrace.h>

Go to the source code of this file.

Data Structures
struct	single_step_state

Macros
#define	PTRACE_O_MASK_TILE   (PTRACE_O_TRACEMIGRATE)
#define	PT_TRACE_MIGRATE   0x00080000
#define	PT_TRACE_MASK_TILE   (PT_TRACE_MIGRATE)
#define	PT_FLAGS_DISABLE_IRQ   1 /* on return to kernel, disable irqs */
#define	PT_FLAGS_CALLER_SAVES   2 /* caller-save registers are valid */
#define	PT_FLAGS_RESTORE_REGS   4 /* restore callee-save regs on return */
#define	instruction_pointer(regs)   ((regs)->pc)
#define	profile_pc(regs)   instruction_pointer(regs)
#define	user_mode(regs)   (EX1_PL((regs)->ex1) == USER_PL)
#define	arch_has_single_step()   (1)
#define	SINGLESTEP_STATE_MASK_IS_ENABLED   0x1
#define	SINGLESTEP_STATE_MASK_UPDATE   0x2
#define	SINGLESTEP_STATE_TARGET_LB   2
#define	SINGLESTEP_STATE_TARGET_UB   7

Typedefs
typedef unsigned long	pt_reg_t

Functions
struct pt_regs *	get_pt_regs (struct pt_regs *)
void	do_syscall_trace (void)
void	single_step_once (struct pt_regs *regs)
void	single_step_execve (void)
void	send_sigtrap (struct task_struct *tsk, struct pt_regs *regs, int error_code)

Macro Definition Documentation

#define arch_has_single_step

(

)

(1)

Definition at line 49 of file ptrace.h.

#define instruction_pointer

(

regs

)

((regs)->pc)

Definition at line 37 of file ptrace.h.

#define profile_pc

(

regs

)

instruction_pointer(regs)

Definition at line 38 of file ptrace.h.

#define PT_FLAGS_CALLER_SAVES   2 /* caller-save registers are valid */

Definition at line 32 of file ptrace.h.

#define PT_FLAGS_DISABLE_IRQ   1 /* on return to kernel, disable irqs */

Definition at line 31 of file ptrace.h.

#define PT_FLAGS_RESTORE_REGS   4 /* restore callee-save regs on return */

Definition at line 33 of file ptrace.h.

#define PT_TRACE_MASK_TILE   (PT_TRACE_MIGRATE)

Definition at line 28 of file ptrace.h.

#define PT_TRACE_MIGRATE   0x00080000

Definition at line 27 of file ptrace.h.

#define PTRACE_O_MASK_TILE   (PTRACE_O_TRACEMIGRATE)

Definition at line 26 of file ptrace.h.

#define SINGLESTEP_STATE_MASK_IS_ENABLED   0x1

Definition at line 91 of file ptrace.h.

#define SINGLESTEP_STATE_MASK_UPDATE   0x2

Definition at line 92 of file ptrace.h.

#define SINGLESTEP_STATE_TARGET_LB   2

Definition at line 93 of file ptrace.h.

#define SINGLESTEP_STATE_TARGET_UB   7

Definition at line 94 of file ptrace.h.

#define user_mode

(

regs

)

(EX1_PL((regs)->ex1) == USER_PL)

Definition at line 41 of file ptrace.h.

Typedef Documentation

typedef unsigned long pt_reg_t

Definition at line 21 of file ptrace.h.

Function Documentation

void do_syscall_trace

(

void

)

Definition at line 181 of file ptrace.c.

struct pt_regs* get_pt_regs ( struct pt_regs *  )

read

void send_sigtrap	(	struct task_struct *	tsk,
		struct pt_regs *	regs,
		int	error_code
	)

Definition at line 188 of file ptrace.c.

void single_step_execve

(

void

)

Definition at line 281 of file single_step.c.

void single_step_once

(

struct pt_regs *

regs

)

single_step_once() - entry point when single stepping has been triggered. : The machine register state

When we arrive at this routine via a trampoline, the single step engine copies the executing bundle to the single step buffer. If the instruction is a condition branch, then the target is reset to one past the next instruction. If the instruction sets the lr, then that is noted. If the instruction is a jump or call, then the new target pc is preserved and the current bundle instruction set to null.

The necessary post-single-step rewriting information is stored in single_step_state-> We use data segment values because the stack will be rewound when we run the rewritten single-stepped instruction.

Definition at line 305 of file single_step.c.