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Merge branch 'perf/kprobes' into perf/core

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Conflicts:
	arch/x86/kernel/traps.c

The kprobes enhancements are fully cooked, ship them upstream.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar
2014-06-05 11:18:34 +02:00
parent c56d34064b 69902c718c
commit 10b0256496
34 changed files with 583 additions and 432 deletions
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35
arch/x86/kernel/traps.c
View File

@@ -107,7 +107,7 @@ static inline void preempt_conditional_cli(struct pt_regs *regs)
preempt_count_dec();
}
static int __kprobes
static nokprobe_inline int
do_trap_no_signal(struct task_struct *tsk, int trapnr, char *str,
struct pt_regs *regs, long error_code)
{
@@ -168,7 +168,7 @@ static siginfo_t *fill_trap_info(struct pt_regs *regs, int signr, int trapnr,
return info;
}
static void __kprobes
static void
do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
long error_code, siginfo_t *info)
{
@@ -202,6 +202,7 @@ do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
force_sig_info(signr, info ?: SEND_SIG_PRIV, tsk);
}
NOKPROBE_SYMBOL(do_trap);
static void do_error_trap(struct pt_regs *regs, long error_code, char *str,
unsigned long trapnr, int signr)
@@ -277,7 +278,7 @@ dotraplinkage void do_double_fault(struct pt_regs *regs, long error_code)
}
#endif
dotraplinkage void __kprobes
dotraplinkage void
do_general_protection(struct pt_regs *regs, long error_code)
{
struct task_struct *tsk;
@@ -323,9 +324,10 @@ do_general_protection(struct pt_regs *regs, long error_code)
exit:
exception_exit(prev_state);
}
NOKPROBE_SYMBOL(do_general_protection);
/* May run on IST stack. */
dotraplinkage void __kprobes notrace do_int3(struct pt_regs *regs, long error_code)
dotraplinkage void notrace do_int3(struct pt_regs *regs, long error_code)
{
enum ctx_state prev_state;
@@ -341,13 +343,18 @@ dotraplinkage void __kprobes notrace do_int3(struct pt_regs *regs, long error_co
if (poke_int3_handler(regs))
return;
prev_state = exception_enter();
#ifdef CONFIG_KGDB_LOW_LEVEL_TRAP
if (kgdb_ll_trap(DIE_INT3, "int3", regs, error_code, X86_TRAP_BP,
SIGTRAP) == NOTIFY_STOP)
goto exit;
#endif /* CONFIG_KGDB_LOW_LEVEL_TRAP */
#ifdef CONFIG_KPROBES
if (kprobe_int3_handler(regs))
return;
#endif
prev_state = exception_enter();
if (notify_die(DIE_INT3, "int3", regs, error_code, X86_TRAP_BP,
SIGTRAP) == NOTIFY_STOP)
goto exit;
@@ -364,6 +371,7 @@ dotraplinkage void __kprobes notrace do_int3(struct pt_regs *regs, long error_co
exit:
exception_exit(prev_state);
}
NOKPROBE_SYMBOL(do_int3);
#ifdef CONFIG_X86_64
/*
@@ -371,7 +379,7 @@ exit:
* for scheduling or signal handling. The actual stack switch is done in
* entry.S
*/
asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *eregs)
asmlinkage struct pt_regs *sync_regs(struct pt_regs *eregs)
{
struct pt_regs *regs = eregs;
/* Did already sync */
@@ -390,6 +398,7 @@ asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *eregs)
*regs = *eregs;
return regs;
}
NOKPROBE_SYMBOL(sync_regs);
#endif
/*
@@ -416,7 +425,7 @@ asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *eregs)
*
* May run on IST stack.
*/
dotraplinkage void __kprobes do_debug(struct pt_regs *regs, long error_code)
dotraplinkage void do_debug(struct pt_regs *regs, long error_code)
{
struct task_struct *tsk = current;
enum ctx_state prev_state;
@@ -424,8 +433,6 @@ dotraplinkage void __kprobes do_debug(struct pt_regs *regs, long error_code)
unsigned long dr6;
int si_code;
prev_state = exception_enter();
get_debugreg(dr6, 6);
/* Filter out all the reserved bits which are preset to 1 */
@@ -454,6 +461,12 @@ dotraplinkage void __kprobes do_debug(struct pt_regs *regs, long error_code)
/* Store the virtualized DR6 value */
tsk->thread.debugreg6 = dr6;
#ifdef CONFIG_KPROBES
if (kprobe_debug_handler(regs))
goto exit;
#endif
prev_state = exception_enter();
if (notify_die(DIE_DEBUG, "debug", regs, (long)&dr6, error_code,
SIGTRAP) == NOTIFY_STOP)
goto exit;
@@ -496,6 +509,7 @@ dotraplinkage void __kprobes do_debug(struct pt_regs *regs, long error_code)
exit:
exception_exit(prev_state);
}
NOKPROBE_SYMBOL(do_debug);
/*
* Note that we play around with the 'TS' bit in an attempt to get
@@ -667,7 +681,7 @@ void math_state_restore(void)
}
EXPORT_SYMBOL_GPL(math_state_restore);
dotraplinkage void __kprobes
dotraplinkage void
do_device_not_available(struct pt_regs *regs, long error_code)
{
enum ctx_state prev_state;
@@ -693,6 +707,7 @@ do_device_not_available(struct pt_regs *regs, long error_code)
#endif
exception_exit(prev_state);
}
NOKPROBE_SYMBOL(do_device_not_available);
#ifdef CONFIG_X86_32
dotraplinkage void do_iret_error(struct pt_regs *regs, long error_code)