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s390/kprobes: make use of NOKPROBE_SYMBOL()

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Use NOKPROBE_SYMBOL() instead of __kprobes annotation.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2014-10-22 12:42:38 +02:00 committed by Martin Schwidefsky
parent c933146a5e
commit 7a5388de5c
7 changed files with 74 additions and 46 deletions
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4
arch/s390/kernel/ftrace.c
View File

@ -152,8 +152,7 @@ device_initcall(ftrace_plt_init);
* Hook the return address and push it in the stack of return addresses
* in current thread info.
*/
unsigned long __kprobes prepare_ftrace_return(unsigned long parent,
unsigned long ip)
unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip)
{
struct ftrace_graph_ent trace;
@ -171,6 +170,7 @@ unsigned long __kprobes prepare_ftrace_return(unsigned long parent,
out:
return parent;
}
NOKPROBE_SYMBOL(prepare_ftrace_return);
/*
* Patch the kernel code at ftrace_graph_caller location. The instruction

3
arch/s390/kernel/idle.c
View File

@ -19,7 +19,7 @@
static DEFINE_PER_CPU(struct s390_idle_data, s390_idle);
void __kprobes enabled_wait(void)
void enabled_wait(void)
{
struct s390_idle_data *idle = this_cpu_ptr(&s390_idle);
unsigned long long idle_time;
@ -46,6 +46,7 @@ void __kprobes enabled_wait(void)
smp_wmb();
idle->sequence++;
}
NOKPROBE_SYMBOL(enabled_wait);
static ssize_t show_idle_count(struct device *dev,
struct device_attribute *attr, char *buf)

88
arch/s390/kernel/kprobes.c
View File

@ -59,7 +59,7 @@ struct kprobe_insn_cache kprobe_dmainsn_slots = {
.insn_size = MAX_INSN_SIZE,
};
static void __kprobes copy_instruction(struct kprobe *p)
static void copy_instruction(struct kprobe *p)
{
unsigned long ip = (unsigned long) p->addr;
s64 disp, new_disp;
@ -91,13 +91,14 @@ static void __kprobes copy_instruction(struct kprobe *p)
new_disp = ((addr + (disp * 2)) - new_addr) / 2;
*(s32 *)&p->ainsn.insn[1] = new_disp;
}
NOKPROBE_SYMBOL(copy_instruction);
static inline int is_kernel_addr(void *addr)
{
return addr < (void *)_end;
}
static int __kprobes s390_get_insn_slot(struct kprobe *p)
static int s390_get_insn_slot(struct kprobe *p)
{
/*
* Get an insn slot that is within the same 2GB area like the original
@ -111,8 +112,9 @@ static int __kprobes s390_get_insn_slot(struct kprobe *p)
p->ainsn.insn = get_insn_slot();
return p->ainsn.insn ? 0 : -ENOMEM;
}
NOKPROBE_SYMBOL(s390_get_insn_slot);
static void __kprobes s390_free_insn_slot(struct kprobe *p)
static void s390_free_insn_slot(struct kprobe *p)
{
if (!p->ainsn.insn)
return;
@ -122,8 +124,9 @@ static void __kprobes s390_free_insn_slot(struct kprobe *p)
free_insn_slot(p->ainsn.insn, 0);
p->ainsn.insn = NULL;
}
NOKPROBE_SYMBOL(s390_free_insn_slot);
int __kprobes arch_prepare_kprobe(struct kprobe *p)
int arch_prepare_kprobe(struct kprobe *p)
{
if ((unsigned long) p->addr & 0x01)
return -EINVAL;
@ -135,6 +138,7 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
copy_instruction(p);
return 0;
}
NOKPROBE_SYMBOL(arch_prepare_kprobe);
int arch_check_ftrace_location(struct kprobe *p)
{
@ -146,7 +150,7 @@ struct swap_insn_args {
unsigned int arm_kprobe : 1;
};
static int __kprobes swap_instruction(void *data)
static int swap_instruction(void *data)
{
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
unsigned long status = kcb->kprobe_status;
@ -177,29 +181,33 @@ static int __kprobes swap_instruction(void *data)
kcb->kprobe_status = status;
return 0;
}
NOKPROBE_SYMBOL(swap_instruction);
void __kprobes arch_arm_kprobe(struct kprobe *p)
void arch_arm_kprobe(struct kprobe *p)
{
struct swap_insn_args args = {.p = p, .arm_kprobe = 1};
stop_machine(swap_instruction, &args, NULL);
}
NOKPROBE_SYMBOL(arch_arm_kprobe);
void __kprobes arch_disarm_kprobe(struct kprobe *p)
void arch_disarm_kprobe(struct kprobe *p)
{
struct swap_insn_args args = {.p = p, .arm_kprobe = 0};
stop_machine(swap_instruction, &args, NULL);
}
NOKPROBE_SYMBOL(arch_disarm_kprobe);
void __kprobes arch_remove_kprobe(struct kprobe *p)
void arch_remove_kprobe(struct kprobe *p)
{
s390_free_insn_slot(p);
}
NOKPROBE_SYMBOL(arch_remove_kprobe);
static void __kprobes enable_singlestep(struct kprobe_ctlblk *kcb,
struct pt_regs *regs,
unsigned long ip)
static void enable_singlestep(struct kprobe_ctlblk *kcb,
struct pt_regs *regs,
unsigned long ip)
{
struct per_regs per_kprobe;
@ -219,10 +227,11 @@ static void __kprobes enable_singlestep(struct kprobe_ctlblk *kcb,
regs->psw.mask &= ~(PSW_MASK_IO | PSW_MASK_EXT);
regs->psw.addr = ip | PSW_ADDR_AMODE;
}
NOKPROBE_SYMBOL(enable_singlestep);
static void __kprobes disable_singlestep(struct kprobe_ctlblk *kcb,
struct pt_regs *regs,
unsigned long ip)
static void disable_singlestep(struct kprobe_ctlblk *kcb,
struct pt_regs *regs,
unsigned long ip)
{
/* Restore control regs and psw mask, set new psw address */
__ctl_load(kcb->kprobe_saved_ctl, 9, 11);
@ -230,41 +239,43 @@ static void __kprobes disable_singlestep(struct kprobe_ctlblk *kcb,
regs->psw.mask |= kcb->kprobe_saved_imask;
regs->psw.addr = ip | PSW_ADDR_AMODE;
}
NOKPROBE_SYMBOL(disable_singlestep);
/*
* Activate a kprobe by storing its pointer to current_kprobe. The
* previous kprobe is stored in kcb->prev_kprobe. A stack of up to
* two kprobes can be active, see KPROBE_REENTER.
*/
static void __kprobes push_kprobe(struct kprobe_ctlblk *kcb, struct kprobe *p)
static void push_kprobe(struct kprobe_ctlblk *kcb, struct kprobe *p)
{
kcb->prev_kprobe.kp = __this_cpu_read(current_kprobe);
kcb->prev_kprobe.status = kcb->kprobe_status;
__this_cpu_write(current_kprobe, p);
}
NOKPROBE_SYMBOL(push_kprobe);
/*
* Deactivate a kprobe by backing up to the previous state. If the
* current state is KPROBE_REENTER prev_kprobe.kp will be non-NULL,
* for any other state prev_kprobe.kp will be NULL.
*/
static void __kprobes pop_kprobe(struct kprobe_ctlblk *kcb)
static void pop_kprobe(struct kprobe_ctlblk *kcb)
{
__this_cpu_write(current_kprobe, kcb->prev_kprobe.kp);
kcb->kprobe_status = kcb->prev_kprobe.status;
}
NOKPROBE_SYMBOL(pop_kprobe);
void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
struct pt_regs *regs)
void arch_prepare_kretprobe(struct kretprobe_instance *ri, struct pt_regs *regs)
{
ri->ret_addr = (kprobe_opcode_t *) regs->gprs[14];
/* Replace the return addr with trampoline addr */
regs->gprs[14] = (unsigned long) &kretprobe_trampoline;
}
NOKPROBE_SYMBOL(arch_prepare_kretprobe);
static void __kprobes kprobe_reenter_check(struct kprobe_ctlblk *kcb,
struct kprobe *p)
static void kprobe_reenter_check(struct kprobe_ctlblk *kcb, struct kprobe *p)
{
switch (kcb->kprobe_status) {
case KPROBE_HIT_SSDONE:
@ -284,8 +295,9 @@ static void __kprobes kprobe_reenter_check(struct kprobe_ctlblk *kcb,
BUG();
}
}
NOKPROBE_SYMBOL(kprobe_reenter_check);
static int __kprobes kprobe_handler(struct pt_regs *regs)
static int kprobe_handler(struct pt_regs *regs)
{
struct kprobe_ctlblk *kcb;
struct kprobe *p;
@ -359,6 +371,7 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
preempt_enable_no_resched();
return 0;
}
NOKPROBE_SYMBOL(kprobe_handler);
/*
* Function return probe trampoline:
@ -375,8 +388,7 @@ static void __used kretprobe_trampoline_holder(void)
/*
* Called when the probe at kretprobe trampoline is hit
*/
static int __kprobes trampoline_probe_handler(struct kprobe *p,
struct pt_regs *regs)
static int trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
{
struct kretprobe_instance *ri;
struct hlist_head *head, empty_rp;
@ -464,6 +476,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
*/
return 1;
}
NOKPROBE_SYMBOL(trampoline_probe_handler);
/*
* Called after single-stepping. p->addr is the address of the
@ -473,7 +486,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
* single-stepped a copy of the instruction. The address of this
* copy is p->ainsn.insn.
*/
static void __kprobes resume_execution(struct kprobe *p, struct pt_regs *regs)
static void resume_execution(struct kprobe *p, struct pt_regs *regs)
{
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
unsigned long ip = regs->psw.addr & PSW_ADDR_INSN;
@ -514,8 +527,9 @@ static void __kprobes resume_execution(struct kprobe *p, struct pt_regs *regs)
disable_singlestep(kcb, regs, ip);
}
NOKPROBE_SYMBOL(resume_execution);
static int __kprobes post_kprobe_handler(struct pt_regs *regs)
static int post_kprobe_handler(struct pt_regs *regs)
{
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
struct kprobe *p = kprobe_running();
@ -542,8 +556,9 @@ static int __kprobes post_kprobe_handler(struct pt_regs *regs)
return 1;
}
NOKPROBE_SYMBOL(post_kprobe_handler);
static int __kprobes kprobe_trap_handler(struct pt_regs *regs, int trapnr)
static int kprobe_trap_handler(struct pt_regs *regs, int trapnr)
{
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
struct kprobe *p = kprobe_running();
@ -605,8 +620,9 @@ static int __kprobes kprobe_trap_handler(struct pt_regs *regs, int trapnr)
}
return 0;
}
NOKPROBE_SYMBOL(kprobe_trap_handler);
int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
{
int ret;
@ -617,12 +633,13 @@ int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
local_irq_restore(regs->psw.mask & ~PSW_MASK_PER);
return ret;
}
NOKPROBE_SYMBOL(kprobe_fault_handler);
/*
* Wrapper routine to for handling exceptions.
*/
int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
unsigned long val, void *data)
int kprobe_exceptions_notify(struct notifier_block *self,
unsigned long val, void *data)
{
struct die_args *args = (struct die_args *) data;
struct pt_regs *regs = args->regs;
@ -654,8 +671,9 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
return ret;
}
NOKPROBE_SYMBOL(kprobe_exceptions_notify);
int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
int setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
{
struct jprobe *jp = container_of(p, struct jprobe, kp);
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
@ -673,13 +691,15 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
memcpy(kcb->jprobes_stack, (void *) stack, MIN_STACK_SIZE(stack));
return 1;
}
NOKPROBE_SYMBOL(setjmp_pre_handler);
void __kprobes jprobe_return(void)
void jprobe_return(void)
{
asm volatile(".word 0x0002");
}
NOKPROBE_SYMBOL(jprobe_return);
int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
int longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
{
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
unsigned long stack;
@ -693,6 +713,7 @@ int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
preempt_enable_no_resched();
return 1;
}
NOKPROBE_SYMBOL(longjmp_break_handler);
static struct kprobe trampoline = {
.addr = (kprobe_opcode_t *) &kretprobe_trampoline,
@ -704,7 +725,8 @@ int __init arch_init_kprobes(void)
return register_kprobe(&trampoline);
}
int __kprobes arch_trampoline_kprobe(struct kprobe *p)
int arch_trampoline_kprobe(struct kprobe *p)
{
return p->addr == (kprobe_opcode_t *) &kretprobe_trampoline;
}
NOKPROBE_SYMBOL(arch_trampoline_kprobe);

2
arch/s390/kernel/process.c
View File

@ -61,7 +61,7 @@ unsigned long thread_saved_pc(struct task_struct *tsk)
return sf->gprs[8];
}
extern void __kprobes kernel_thread_starter(void);
extern void kernel_thread_starter(void);
/*
* Free current thread data structures etc..

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

@ -61,10 +61,11 @@ static DEFINE_PER_CPU(struct clock_event_device, comparators);
/*
* Scheduler clock - returns current time in nanosec units.
*/
unsigned long long notrace __kprobes sched_clock(void)
unsigned long long notrace sched_clock(void)
{
return tod_to_ns(get_tod_clock_monotonic());
}
NOKPROBE_SYMBOL(sched_clock);
/*
* Monotonic_clock - returns # of nanoseconds passed since time_init()

14
arch/s390/kernel/traps.c
View File

@ -87,16 +87,16 @@ void do_report_trap(struct pt_regs *regs, int si_signo, int si_code, char *str)
}
}
static void __kprobes do_trap(struct pt_regs *regs, int si_signo, int si_code,
char *str)
static void do_trap(struct pt_regs *regs, int si_signo, int si_code, char *str)
{
if (notify_die(DIE_TRAP, str, regs, 0,
regs->int_code, si_signo) == NOTIFY_STOP)
return;
do_report_trap(regs, si_signo, si_code, str);
}
NOKPROBE_SYMBOL(do_trap);
void __kprobes do_per_trap(struct pt_regs *regs)
void do_per_trap(struct pt_regs *regs)
{
siginfo_t info;
@ -111,6 +111,7 @@ void __kprobes do_per_trap(struct pt_regs *regs)
(void __force __user *) current->thread.per_event.address;
force_sig_info(SIGTRAP, &info, current);
}
NOKPROBE_SYMBOL(do_per_trap);
void default_trap_handler(struct pt_regs *regs)
{
@ -179,7 +180,7 @@ static inline void do_fp_trap(struct pt_regs *regs, int fpc)
do_trap(regs, SIGFPE, si_code, "floating point exception");
}
void __kprobes illegal_op(struct pt_regs *regs)
void illegal_op(struct pt_regs *regs)
{
siginfo_t info;
__u8 opcode[6];
@ -252,7 +253,7 @@ void __kprobes illegal_op(struct pt_regs *regs)
if (signal)
do_trap(regs, signal, ILL_ILLOPC, "illegal operation");
}
NOKPROBE_SYMBOL(illegal_op);
#ifdef CONFIG_MATHEMU
void specification_exception(struct pt_regs *regs)
@ -469,7 +470,7 @@ void space_switch_exception(struct pt_regs *regs)
do_trap(regs, SIGILL, ILL_PRVOPC, "space switch event");
}
void __kprobes kernel_stack_overflow(struct pt_regs * regs)
void kernel_stack_overflow(struct pt_regs *regs)
{
bust_spinlocks(1);
printk("Kernel stack overflow.\n");
@ -477,6 +478,7 @@ void __kprobes kernel_stack_overflow(struct pt_regs * regs)
bust_spinlocks(0);
panic("Corrupt kernel stack, can't continue.");
}
NOKPROBE_SYMBOL(kernel_stack_overflow);
void __init trap_init(void)
{

6
arch/s390/mm/fault.c
View File

@ -548,7 +548,7 @@ static inline int do_exception(struct pt_regs *regs, int access)
return fault;
}
void __kprobes do_protection_exception(struct pt_regs *regs)
void do_protection_exception(struct pt_regs *regs)
{
unsigned long trans_exc_code;
int fault;
@ -574,8 +574,9 @@ void __kprobes do_protection_exception(struct pt_regs *regs)
if (unlikely(fault))
do_fault_error(regs, fault);
}
NOKPROBE_SYMBOL(do_protection_exception);
void __kprobes do_dat_exception(struct pt_regs *regs)
void do_dat_exception(struct pt_regs *regs)
{
int access, fault;
@ -584,6 +585,7 @@ void __kprobes do_dat_exception(struct pt_regs *regs)
if (unlikely(fault))
do_fault_error(regs, fault);
}
NOKPROBE_SYMBOL(do_dat_exception);
#ifdef CONFIG_PFAULT
/*