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[S390] add kprobes annotations

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Add kprobes annotations to get the massive 'probe kernel.function("*") {}'
stress test working.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky 2011-01-05 12:47:25 +01:00 committed by Martin Schwidefsky
parent 4a1886358b
commit 860dba45e8
8 changed files with 26 additions and 9 deletions
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4
arch/s390/kernel/entry.S
View file

@ -188,6 +188,8 @@ STACK_SIZE = 1 << STACK_SHIFT
ssm __SF_EMPTY(%r15)
.endm
.section .kprobes.text, "ax"
/*
* Scheduler resume function, called by switch_to
* gpr2 = (task_struct *) prev
@ -861,6 +863,8 @@ restart_crash:
restart_go:
#endif
.section .kprobes.text, "ax"
#ifdef CONFIG_CHECK_STACK
/*
* The synchronous or the asynchronous stack overflowed. We are dead.

4
arch/s390/kernel/entry64.S
View file

@ -197,6 +197,8 @@ _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
ssm __SF_EMPTY(%r15)
.endm
.section .kprobes.text, "ax"
/*
* Scheduler resume function, called by switch_to
* gpr2 = (task_struct *) prev
@ -868,6 +870,8 @@ restart_crash:
restart_go:
#endif
.section .kprobes.text, "ax"
#ifdef CONFIG_CHECK_STACK
/*
* The synchronous or the asynchronous stack overflowed. We are dead.

2
arch/s390/kernel/mcount.S
View file

@ -7,6 +7,8 @@
#include <asm/asm-offsets.h>
.section .kprobes.text, "ax"
.globl ftrace_stub
ftrace_stub:
br %r14

2
arch/s390/kernel/mcount64.S
View file

@ -7,6 +7,8 @@
#include <asm/asm-offsets.h>
.section .kprobes.text, "ax"
.globl ftrace_stub
ftrace_stub:
br %r14

9
arch/s390/kernel/process.c
View file

@ -32,6 +32,7 @@
#include <linux/kernel_stat.h>
#include <linux/syscalls.h>
#include <linux/compat.h>
#include <linux/kprobes.h>
#include <asm/compat.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
@ -116,15 +117,17 @@ void cpu_idle(void)
}
}
extern void kernel_thread_starter(void);
extern void __kprobes kernel_thread_starter(void);
asm(
".align 4\n"
".section .kprobes.text, \"ax\"\n"
".global kernel_thread_starter\n"
"kernel_thread_starter:\n"
" la 2,0(10)\n"
" basr 14,9\n"
" la 2,0\n"
" br 11\n");
" br 11\n"
".previous\n");
int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
{

3
arch/s390/kernel/time.c
View file

@ -37,6 +37,7 @@
#include <linux/clocksource.h>
#include <linux/clockchips.h>
#include <linux/gfp.h>
#include <linux/kprobes.h>
#include <asm/uaccess.h>
#include <asm/delay.h>
#include <asm/s390_ext.h>
@ -60,7 +61,7 @@ static DEFINE_PER_CPU(struct clock_event_device, comparators);
/*
* Scheduler clock - returns current time in nanosec units.
*/
unsigned long long notrace sched_clock(void)
unsigned long long notrace __kprobes sched_clock(void)
{
return (get_clock_monotonic() * 125) >> 9;
}

6
arch/s390/kernel/traps.c
View file

@ -451,8 +451,8 @@ static inline void do_fp_trap(struct pt_regs *regs, void __user *location,
"floating point exception", regs, &si);
}
static void illegal_op(struct pt_regs *regs, long pgm_int_code,
unsigned long trans_exc_code)
static void __kprobes illegal_op(struct pt_regs *regs, long pgm_int_code,
unsigned long trans_exc_code)
{
siginfo_t info;
__u8 opcode[6];
@ -688,7 +688,7 @@ static void space_switch_exception(struct pt_regs *regs, long pgm_int_code,
do_trap(pgm_int_code, SIGILL, "space switch event", regs, &info);
}
asmlinkage void kernel_stack_overflow(struct pt_regs * regs)
asmlinkage void __kprobes kernel_stack_overflow(struct pt_regs * regs)
{
bust_spinlocks(1);
printk("Kernel stack overflow.\n");

5
arch/s390/kernel/vtime.c
View file

@ -20,6 +20,7 @@
#include <linux/rcupdate.h>
#include <linux/posix-timers.h>
#include <linux/cpu.h>
#include <linux/kprobes.h>
#include <asm/s390_ext.h>
#include <asm/timer.h>
@ -122,7 +123,7 @@ void account_system_vtime(struct task_struct *tsk)
}
EXPORT_SYMBOL_GPL(account_system_vtime);
void vtime_start_cpu(__u64 int_clock, __u64 enter_timer)
void __kprobes vtime_start_cpu(__u64 int_clock, __u64 enter_timer)
{
struct s390_idle_data *idle = &__get_cpu_var(s390_idle);
struct vtimer_queue *vq = &__get_cpu_var(virt_cpu_timer);
@ -162,7 +163,7 @@ void vtime_start_cpu(__u64 int_clock, __u64 enter_timer)
idle->sequence++;
}
void vtime_stop_cpu(void)
void __kprobes vtime_stop_cpu(void)
{
struct s390_idle_data *idle = &__get_cpu_var(s390_idle);
struct vtimer_queue *vq = &__get_cpu_var(virt_cpu_timer);