You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
243 lines
8.9 KiB
243 lines
8.9 KiB
#ifndef _LINUX_PTRACE_H
|
|
#define _LINUX_PTRACE_H
|
|
/* ptrace.h */
|
|
/* structs and defines to help the user use the ptrace system call. */
|
|
|
|
/* has the defines to get at the registers. */
|
|
|
|
#define PTRACE_TRACEME 0
|
|
#define PTRACE_PEEKTEXT 1
|
|
#define PTRACE_PEEKDATA 2
|
|
#define PTRACE_PEEKUSR 3
|
|
#define PTRACE_POKETEXT 4
|
|
#define PTRACE_POKEDATA 5
|
|
#define PTRACE_POKEUSR 6
|
|
#define PTRACE_CONT 7
|
|
#define PTRACE_KILL 8
|
|
#define PTRACE_SINGLESTEP 9
|
|
|
|
#define PTRACE_ATTACH 16
|
|
#define PTRACE_DETACH 17
|
|
|
|
#define PTRACE_SYSCALL 24
|
|
|
|
/* 0x4200-0x4300 are reserved for architecture-independent additions. */
|
|
#define PTRACE_SETOPTIONS 0x4200
|
|
#define PTRACE_GETEVENTMSG 0x4201
|
|
#define PTRACE_GETSIGINFO 0x4202
|
|
#define PTRACE_SETSIGINFO 0x4203
|
|
|
|
/* options set using PTRACE_SETOPTIONS */
|
|
#define PTRACE_O_TRACESYSGOOD 0x00000001
|
|
#define PTRACE_O_TRACEFORK 0x00000002
|
|
#define PTRACE_O_TRACEVFORK 0x00000004
|
|
#define PTRACE_O_TRACECLONE 0x00000008
|
|
#define PTRACE_O_TRACEEXEC 0x00000010
|
|
#define PTRACE_O_TRACEVFORKDONE 0x00000020
|
|
#define PTRACE_O_TRACEEXIT 0x00000040
|
|
|
|
#define PTRACE_O_MASK 0x0000007f
|
|
|
|
/* Wait extended result codes for the above trace options. */
|
|
#define PTRACE_EVENT_FORK 1
|
|
#define PTRACE_EVENT_VFORK 2
|
|
#define PTRACE_EVENT_CLONE 3
|
|
#define PTRACE_EVENT_EXEC 4
|
|
#define PTRACE_EVENT_VFORK_DONE 5
|
|
#define PTRACE_EVENT_EXIT 6
|
|
|
|
#include <asm/ptrace.h>
|
|
|
|
#ifdef __KERNEL__
|
|
/*
|
|
* Ptrace flags
|
|
*
|
|
* The owner ship rules for task->ptrace which holds the ptrace
|
|
* flags is simple. When a task is running it owns it's task->ptrace
|
|
* flags. When the a task is stopped the ptracer owns task->ptrace.
|
|
*/
|
|
|
|
#define PT_PTRACED 0x00000001
|
|
#define PT_DTRACE 0x00000002 /* delayed trace (used on m68k, i386) */
|
|
#define PT_TRACESYSGOOD 0x00000004
|
|
#define PT_PTRACE_CAP 0x00000008 /* ptracer can follow suid-exec */
|
|
#define PT_TRACE_FORK 0x00000010
|
|
#define PT_TRACE_VFORK 0x00000020
|
|
#define PT_TRACE_CLONE 0x00000040
|
|
#define PT_TRACE_EXEC 0x00000080
|
|
#define PT_TRACE_VFORK_DONE 0x00000100
|
|
#define PT_TRACE_EXIT 0x00000200
|
|
|
|
#define PT_TRACE_MASK 0x000003f4
|
|
|
|
/* single stepping state bits (used on ARM and PA-RISC) */
|
|
#define PT_SINGLESTEP_BIT 31
|
|
#define PT_SINGLESTEP (1<<PT_SINGLESTEP_BIT)
|
|
#define PT_BLOCKSTEP_BIT 30
|
|
#define PT_BLOCKSTEP (1<<PT_BLOCKSTEP_BIT)
|
|
|
|
#include <linux/compiler.h> /* For unlikely. */
|
|
#include <linux/sched.h> /* For struct task_struct. */
|
|
|
|
|
|
extern long arch_ptrace(struct task_struct *child, long request, long addr, long data);
|
|
extern struct task_struct *ptrace_get_task_struct(pid_t pid);
|
|
extern int ptrace_traceme(void);
|
|
extern int ptrace_readdata(struct task_struct *tsk, unsigned long src, char __user *dst, int len);
|
|
extern int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long dst, int len);
|
|
extern int ptrace_attach(struct task_struct *tsk);
|
|
extern int ptrace_detach(struct task_struct *, unsigned int);
|
|
extern void ptrace_disable(struct task_struct *);
|
|
extern int ptrace_check_attach(struct task_struct *task, int kill);
|
|
extern int ptrace_request(struct task_struct *child, long request, long addr, long data);
|
|
extern void ptrace_notify(int exit_code);
|
|
extern void __ptrace_link(struct task_struct *child,
|
|
struct task_struct *new_parent);
|
|
extern void __ptrace_unlink(struct task_struct *child);
|
|
extern void ptrace_untrace(struct task_struct *child);
|
|
extern int ptrace_may_attach(struct task_struct *task);
|
|
extern int __ptrace_may_attach(struct task_struct *task);
|
|
|
|
static inline void ptrace_link(struct task_struct *child,
|
|
struct task_struct *new_parent)
|
|
{
|
|
if (unlikely(child->ptrace))
|
|
__ptrace_link(child, new_parent);
|
|
}
|
|
static inline void ptrace_unlink(struct task_struct *child)
|
|
{
|
|
if (unlikely(child->ptrace))
|
|
__ptrace_unlink(child);
|
|
}
|
|
|
|
int generic_ptrace_peekdata(struct task_struct *tsk, long addr, long data);
|
|
int generic_ptrace_pokedata(struct task_struct *tsk, long addr, long data);
|
|
|
|
#ifndef force_successful_syscall_return
|
|
/*
|
|
* System call handlers that, upon successful completion, need to return a
|
|
* negative value should call force_successful_syscall_return() right before
|
|
* returning. On architectures where the syscall convention provides for a
|
|
* separate error flag (e.g., alpha, ia64, ppc{,64}, sparc{,64}, possibly
|
|
* others), this macro can be used to ensure that the error flag will not get
|
|
* set. On architectures which do not support a separate error flag, the macro
|
|
* is a no-op and the spurious error condition needs to be filtered out by some
|
|
* other means (e.g., in user-level, by passing an extra argument to the
|
|
* syscall handler, or something along those lines).
|
|
*/
|
|
#define force_successful_syscall_return() do { } while (0)
|
|
#endif
|
|
|
|
/*
|
|
* <asm/ptrace.h> should define the following things inside #ifdef __KERNEL__.
|
|
*
|
|
* These do-nothing inlines are used when the arch does not
|
|
* implement single-step. The kerneldoc comments are here
|
|
* to document the interface for all arch definitions.
|
|
*/
|
|
|
|
#ifndef arch_has_single_step
|
|
/**
|
|
* arch_has_single_step - does this CPU support user-mode single-step?
|
|
*
|
|
* If this is defined, then there must be function declarations or
|
|
* inlines for user_enable_single_step() and user_disable_single_step().
|
|
* arch_has_single_step() should evaluate to nonzero iff the machine
|
|
* supports instruction single-step for user mode.
|
|
* It can be a constant or it can test a CPU feature bit.
|
|
*/
|
|
#define arch_has_single_step() (0)
|
|
|
|
/**
|
|
* user_enable_single_step - single-step in user-mode task
|
|
* @task: either current or a task stopped in %TASK_TRACED
|
|
*
|
|
* This can only be called when arch_has_single_step() has returned nonzero.
|
|
* Set @task so that when it returns to user mode, it will trap after the
|
|
* next single instruction executes. If arch_has_block_step() is defined,
|
|
* this must clear the effects of user_enable_block_step() too.
|
|
*/
|
|
static inline void user_enable_single_step(struct task_struct *task)
|
|
{
|
|
BUG(); /* This can never be called. */
|
|
}
|
|
|
|
/**
|
|
* user_disable_single_step - cancel user-mode single-step
|
|
* @task: either current or a task stopped in %TASK_TRACED
|
|
*
|
|
* Clear @task of the effects of user_enable_single_step() and
|
|
* user_enable_block_step(). This can be called whether or not either
|
|
* of those was ever called on @task, and even if arch_has_single_step()
|
|
* returned zero.
|
|
*/
|
|
static inline void user_disable_single_step(struct task_struct *task)
|
|
{
|
|
}
|
|
#endif /* arch_has_single_step */
|
|
|
|
#ifndef arch_has_block_step
|
|
/**
|
|
* arch_has_block_step - does this CPU support user-mode block-step?
|
|
*
|
|
* If this is defined, then there must be a function declaration or inline
|
|
* for user_enable_block_step(), and arch_has_single_step() must be defined
|
|
* too. arch_has_block_step() should evaluate to nonzero iff the machine
|
|
* supports step-until-branch for user mode. It can be a constant or it
|
|
* can test a CPU feature bit.
|
|
*/
|
|
#define arch_has_block_step() (0)
|
|
|
|
/**
|
|
* user_enable_block_step - step until branch in user-mode task
|
|
* @task: either current or a task stopped in %TASK_TRACED
|
|
*
|
|
* This can only be called when arch_has_block_step() has returned nonzero,
|
|
* and will never be called when single-instruction stepping is being used.
|
|
* Set @task so that when it returns to user mode, it will trap after the
|
|
* next branch or trap taken.
|
|
*/
|
|
static inline void user_enable_block_step(struct task_struct *task)
|
|
{
|
|
BUG(); /* This can never be called. */
|
|
}
|
|
#endif /* arch_has_block_step */
|
|
|
|
#ifndef arch_ptrace_stop_needed
|
|
/**
|
|
* arch_ptrace_stop_needed - Decide whether arch_ptrace_stop() should be called
|
|
* @code: current->exit_code value ptrace will stop with
|
|
* @info: siginfo_t pointer (or %NULL) for signal ptrace will stop with
|
|
*
|
|
* This is called with the siglock held, to decide whether or not it's
|
|
* necessary to release the siglock and call arch_ptrace_stop() with the
|
|
* same @code and @info arguments. It can be defined to a constant if
|
|
* arch_ptrace_stop() is never required, or always is. On machines where
|
|
* this makes sense, it should be defined to a quick test to optimize out
|
|
* calling arch_ptrace_stop() when it would be superfluous. For example,
|
|
* if the thread has not been back to user mode since the last stop, the
|
|
* thread state might indicate that nothing needs to be done.
|
|
*/
|
|
#define arch_ptrace_stop_needed(code, info) (0)
|
|
#endif
|
|
|
|
#ifndef arch_ptrace_stop
|
|
/**
|
|
* arch_ptrace_stop - Do machine-specific work before stopping for ptrace
|
|
* @code: current->exit_code value ptrace will stop with
|
|
* @info: siginfo_t pointer (or %NULL) for signal ptrace will stop with
|
|
*
|
|
* This is called with no locks held when arch_ptrace_stop_needed() has
|
|
* just returned nonzero. It is allowed to block, e.g. for user memory
|
|
* access. The arch can have machine-specific work to be done before
|
|
* ptrace stops. On ia64, register backing store gets written back to user
|
|
* memory here. Since this can be costly (requires dropping the siglock),
|
|
* we only do it when the arch requires it for this particular stop, as
|
|
* indicated by arch_ptrace_stop_needed().
|
|
*/
|
|
#define arch_ptrace_stop(code, info) do { } while (0)
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#endif
|
|
|