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x86: arch_has_single_step

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This defines the new standard arch_has_single_step macro.  It makes the
existing set_singlestep and clear_singlestep entry points global, and
renames them to the new standard names user_enable_single_step and
user_disable_single_step, respectively.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Roland McGrath 2008-01-30 13:30:48 +01:00 committed by Ingo Molnar
parent 77c03dcd44
commit 7f232343e0
3 changed files with 19 additions and 12 deletions
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12
arch/x86/kernel/ptrace_32.c
View File

@ -218,7 +218,7 @@ static inline int is_setting_trap_flag(struct task_struct *child, struct pt_regs
return 0;
}
static void set_singlestep(struct task_struct *child)
void user_enable_single_step(struct task_struct *child)
{
struct pt_regs *regs = get_child_regs(child);
@ -249,7 +249,7 @@ static void set_singlestep(struct task_struct *child)
child->ptrace |= PT_DTRACE;
}
static void clear_singlestep(struct task_struct *child)
void user_disable_single_step(struct task_struct *child)
{
/* Always clear TIF_SINGLESTEP... */
clear_tsk_thread_flag(child, TIF_SINGLESTEP);
@ -269,7 +269,7 @@ static void clear_singlestep(struct task_struct *child)
*/
void ptrace_disable(struct task_struct *child)
{
clear_singlestep(child);
user_disable_single_step(child);
clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
}
@ -403,7 +403,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
}
child->exit_code = data;
/* make sure the single step bit is not set. */
clear_singlestep(child);
user_disable_single_step(child);
wake_up_process(child);
ret = 0;
break;
@ -419,7 +419,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
break;
child->exit_code = SIGKILL;
/* make sure the single step bit is not set. */
clear_singlestep(child);
user_disable_single_step(child);
wake_up_process(child);
break;
@ -435,7 +435,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
set_singlestep(child);
user_enable_single_step(child);
child->exit_code = data;
/* give it a chance to run. */
wake_up_process(child);

12
arch/x86/kernel/ptrace_64.c
View File

@ -170,7 +170,7 @@ static int is_setting_trap_flag(struct task_struct *child, struct pt_regs *regs)
return 0;
}
static void set_singlestep(struct task_struct *child)
void user_enable_single_step(struct task_struct *child)
{
struct pt_regs *regs = task_pt_regs(child);
@ -201,7 +201,7 @@ static void set_singlestep(struct task_struct *child)
child->ptrace |= PT_DTRACE;
}
static void clear_singlestep(struct task_struct *child)
void user_disable_single_step(struct task_struct *child)
{
/* Always clear TIF_SINGLESTEP... */
clear_tsk_thread_flag(child, TIF_SINGLESTEP);
@ -221,7 +221,7 @@ static void clear_singlestep(struct task_struct *child)
*/
void ptrace_disable(struct task_struct *child)
{
clear_singlestep(child);
user_disable_single_step(child);
}
static int putreg(struct task_struct *child,
@ -461,7 +461,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
clear_tsk_thread_flag(child, TIF_SINGLESTEP);
child->exit_code = data;
/* make sure the single step bit is not set. */
clear_singlestep(child);
user_disable_single_step(child);
wake_up_process(child);
ret = 0;
break;
@ -504,7 +504,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
clear_tsk_thread_flag(child, TIF_SINGLESTEP);
child->exit_code = SIGKILL;
/* make sure the single step bit is not set. */
clear_singlestep(child);
user_disable_single_step(child);
wake_up_process(child);
break;
@ -513,7 +513,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
if (!valid_signal(data))
break;
clear_tsk_thread_flag(child,TIF_SYSCALL_TRACE);
set_singlestep(child);
user_enable_single_step(child);
child->exit_code = data;
/* give it a chance to run. */
wake_up_process(child);

7
include/asm-x86/ptrace.h
View File

@ -140,6 +140,13 @@ enum {
#ifdef __KERNEL__
/*
* These are defined as per linux/ptrace.h, which see.
*/
#define arch_has_single_step() (1)
extern void user_enable_single_step(struct task_struct *);
extern void user_disable_single_step(struct task_struct *);
struct user_desc;
extern int do_get_thread_area(struct task_struct *p, int idx,
struct user_desc __user *info);