[tip:perf/kprobes] kprobes, x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation

From: tip-bot for Masami Hiramatsu
Date: Thu Apr 24 2014 - 07:02:02 EST

Commit-ID: 9326638cbee2d36b051ed2a69f3e4e107e5f86bd
Gitweb: http://git.kernel.org/tip/9326638cbee2d36b051ed2a69f3e4e107e5f86bd
Author: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
AuthorDate: Thu, 17 Apr 2014 17:18:14 +0900
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Thu, 24 Apr 2014 10:26:38 +0200

kprobes, x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation

Use NOKPROBE_SYMBOL macro for protecting functions
from kprobes instead of __kprobes annotation under
arch/x86.

This applies nokprobe_inline annotation for some cases,
because NOKPROBE_SYMBOL() will inhibit inlining by
referring the symbol address.

This just folds a bunch of previous NOKPROBE_SYMBOL()
cleanup patches for x86 to one patch.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20140417081814.26341.51656.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Fernando Luis VÃzquez Cao <fernando_b1@xxxxxxxxxxxxx>
Cc: Gleb Natapov <gleb@xxxxxxxxxx>
Cc: Jason Wang <jasowang@xxxxxxxxxx>
Cc: Jesper Nilsson <jesper.nilsson@xxxxxxxx>
Cc: Jiri Kosina <jkosina@xxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Jiri Slaby <jslaby@xxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Jonathan Lebon <jlebon@xxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Matt Fleming <matt.fleming@xxxxxxxxx>
Cc: Michel Lespinasse <walken@xxxxxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Seiji Aguchi <seiji.aguchi@xxxxxxx>
Cc: Srivatsa Vaddagiri <vatsa@xxxxxxxxxxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Vineet Gupta <vgupta@xxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/include/asm/traps.h | 2 +-
arch/x86/kernel/apic/hw_nmi.c | 3 +-
arch/x86/kernel/cpu/perf_event.c | 3 +-
arch/x86/kernel/cpu/perf_event_amd_ibs.c | 3 +-
arch/x86/kernel/dumpstack.c | 9 ++--
arch/x86/kernel/kprobes/core.c | 77 ++++++++++++++++++++------------
arch/x86/kernel/kprobes/ftrace.c | 15 ++++---
arch/x86/kernel/kprobes/opt.c | 8 ++--
arch/x86/kernel/kvm.c | 4 +-
arch/x86/kernel/nmi.c | 18 +++++---
arch/x86/kernel/traps.c | 20 ++++++---
arch/x86/mm/fault.c | 29 +++++++-----
12 files changed, 122 insertions(+), 69 deletions(-)

diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h
index 58d66fe..ca32508 100644
--- a/arch/x86/include/asm/traps.h
+++ b/arch/x86/include/asm/traps.h
@@ -68,7 +68,7 @@ dotraplinkage void do_segment_not_present(struct pt_regs *, long);
dotraplinkage void do_stack_segment(struct pt_regs *, long);
#ifdef CONFIG_X86_64
dotraplinkage void do_double_fault(struct pt_regs *, long);
-asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *);
+asmlinkage struct pt_regs *sync_regs(struct pt_regs *);
#endif
dotraplinkage void do_general_protection(struct pt_regs *, long);
dotraplinkage void do_page_fault(struct pt_regs *, unsigned long);
diff --git a/arch/x86/kernel/apic/hw_nmi.c b/arch/x86/kernel/apic/hw_nmi.c
index a698d71..73eb5b3 100644
--- a/arch/x86/kernel/apic/hw_nmi.c
+++ b/arch/x86/kernel/apic/hw_nmi.c
@@ -60,7 +60,7 @@ void arch_trigger_all_cpu_backtrace(void)
smp_mb__after_clear_bit();
}

-static int __kprobes
+static int
arch_trigger_all_cpu_backtrace_handler(unsigned int cmd, struct pt_regs *regs)
{
int cpu;
@@ -80,6 +80,7 @@ arch_trigger_all_cpu_backtrace_handler(unsigned int cmd, struct pt_regs *regs)

return NMI_DONE;
}
+NOKPROBE_SYMBOL(arch_trigger_all_cpu_backtrace_handler);

static int __init register_trigger_all_cpu_backtrace(void)
{
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index ae407f7..5fc8771 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1292,7 +1292,7 @@ void perf_events_lapic_init(void)
apic_write(APIC_LVTPC, APIC_DM_NMI);
}

-static int __kprobes
+static int
perf_event_nmi_handler(unsigned int cmd, struct pt_regs *regs)
{
u64 start_clock;
@@ -1310,6 +1310,7 @@ perf_event_nmi_handler(unsigned int cmd, struct pt_regs *regs)

return ret;
}
+NOKPROBE_SYMBOL(perf_event_nmi_handler);

struct event_constraint emptyconstraint;
struct event_constraint unconstrained;
diff --git a/arch/x86/kernel/cpu/perf_event_amd_ibs.c b/arch/x86/kernel/cpu/perf_event_amd_ibs.c
index 4c36bbe..cbb1be3e 100644
--- a/arch/x86/kernel/cpu/perf_event_amd_ibs.c
+++ b/arch/x86/kernel/cpu/perf_event_amd_ibs.c
@@ -593,7 +593,7 @@ out:
return 1;
}

-static int __kprobes
+static int
perf_ibs_nmi_handler(unsigned int cmd, struct pt_regs *regs)
{
int handled = 0;
@@ -606,6 +606,7 @@ perf_ibs_nmi_handler(unsigned int cmd, struct pt_regs *regs)

return handled;
}
+NOKPROBE_SYMBOL(perf_ibs_nmi_handler);

static __init int perf_ibs_pmu_init(struct perf_ibs *perf_ibs, char *name)
{
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index d9c12d3..b74ebc7 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -200,7 +200,7 @@ static arch_spinlock_t die_lock = __ARCH_SPIN_LOCK_UNLOCKED;
static int die_owner = -1;
static unsigned int die_nest_count;

-unsigned __kprobes long oops_begin(void)
+unsigned long oops_begin(void)
{
int cpu;
unsigned long flags;
@@ -223,8 +223,9 @@ unsigned __kprobes long oops_begin(void)
return flags;
}
EXPORT_SYMBOL_GPL(oops_begin);
+NOKPROBE_SYMBOL(oops_begin);

-void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
+void oops_end(unsigned long flags, struct pt_regs *regs, int signr)
{
if (regs && kexec_should_crash(current))
crash_kexec(regs);
@@ -247,8 +248,9 @@ void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
panic("Fatal exception");
do_exit(signr);
}
+NOKPROBE_SYMBOL(oops_end);

-int __kprobes __die(const char *str, struct pt_regs *regs, long err)
+int __die(const char *str, struct pt_regs *regs, long err)
{
#ifdef CONFIG_X86_32
unsigned short ss;
@@ -291,6 +293,7 @@ int __kprobes __die(const char *str, struct pt_regs *regs, long err)
#endif
return 0;
}
+NOKPROBE_SYMBOL(__die);

/*
* This is gone through when something in the kernel has done something bad
diff --git a/arch/x86/kernel/kprobes/core.c b/arch/x86/kernel/kprobes/core.c
index bd71713..7596df6 100644
--- a/arch/x86/kernel/kprobes/core.c
+++ b/arch/x86/kernel/kprobes/core.c
@@ -112,7 +112,8 @@ struct kretprobe_blackpoint kretprobe_blacklist[] = {

const int kretprobe_blacklist_size = ARRAY_SIZE(kretprobe_blacklist);

-static void __kprobes __synthesize_relative_insn(void *from, void *to, u8 op)
+static nokprobe_inline void
+__synthesize_relative_insn(void *from, void *to, u8 op)
{
struct __arch_relative_insn {
u8 op;
@@ -125,21 +126,23 @@ static void __kprobes __synthesize_relative_insn(void *from, void *to, u8 op)
}

/* Insert a jump instruction at address 'from', which jumps to address 'to'.*/
-void __kprobes synthesize_reljump(void *from, void *to)
+void synthesize_reljump(void *from, void *to)
{
__synthesize_relative_insn(from, to, RELATIVEJUMP_OPCODE);
}
+NOKPROBE_SYMBOL(synthesize_reljump);

/* Insert a call instruction at address 'from', which calls address 'to'.*/
-void __kprobes synthesize_relcall(void *from, void *to)
+void synthesize_relcall(void *from, void *to)
{
__synthesize_relative_insn(from, to, RELATIVECALL_OPCODE);
}
+NOKPROBE_SYMBOL(synthesize_relcall);

/*
* Skip the prefixes of the instruction.
*/
-static kprobe_opcode_t *__kprobes skip_prefixes(kprobe_opcode_t *insn)
+static kprobe_opcode_t *skip_prefixes(kprobe_opcode_t *insn)
{
insn_attr_t attr;

@@ -154,6 +157,7 @@ static kprobe_opcode_t *__kprobes skip_prefixes(kprobe_opcode_t *insn)
#endif
return insn;
}
+NOKPROBE_SYMBOL(skip_prefixes);

/*
* Returns non-zero if opcode is boostable.
@@ -425,7 +429,8 @@ void arch_remove_kprobe(struct kprobe *p)
}
}

-static void __kprobes save_previous_kprobe(struct kprobe_ctlblk *kcb)
+static nokprobe_inline void
+save_previous_kprobe(struct kprobe_ctlblk *kcb)
{
kcb->prev_kprobe.kp = kprobe_running();
kcb->prev_kprobe.status = kcb->kprobe_status;
@@ -433,7 +438,8 @@ static void __kprobes save_previous_kprobe(struct kprobe_ctlblk *kcb)
kcb->prev_kprobe.saved_flags = kcb->kprobe_saved_flags;
}

-static void __kprobes restore_previous_kprobe(struct kprobe_ctlblk *kcb)
+static nokprobe_inline void
+restore_previous_kprobe(struct kprobe_ctlblk *kcb)
{
__this_cpu_write(current_kprobe, kcb->prev_kprobe.kp);
kcb->kprobe_status = kcb->prev_kprobe.status;
@@ -441,8 +447,9 @@ static void __kprobes restore_previous_kprobe(struct kprobe_ctlblk *kcb)
kcb->kprobe_saved_flags = kcb->prev_kprobe.saved_flags;
}

-static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs,
- struct kprobe_ctlblk *kcb)
+static nokprobe_inline void
+set_current_kprobe(struct kprobe *p, struct pt_regs *regs,
+ struct kprobe_ctlblk *kcb)
{
__this_cpu_write(current_kprobe, p);
kcb->kprobe_saved_flags = kcb->kprobe_old_flags
@@ -451,7 +458,7 @@ static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs,
kcb->kprobe_saved_flags &= ~X86_EFLAGS_IF;
}

-static void __kprobes clear_btf(void)
+static nokprobe_inline void clear_btf(void)
{
if (test_thread_flag(TIF_BLOCKSTEP)) {
unsigned long debugctl = get_debugctlmsr();
@@ -461,7 +468,7 @@ static void __kprobes clear_btf(void)
}
}

-static void __kprobes restore_btf(void)
+static nokprobe_inline void restore_btf(void)
{
if (test_thread_flag(TIF_BLOCKSTEP)) {
unsigned long debugctl = get_debugctlmsr();
@@ -471,8 +478,7 @@ static void __kprobes restore_btf(void)
}
}

-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)
{
unsigned long *sara = stack_addr(regs);

@@ -481,9 +487,10 @@ arch_prepare_kretprobe(struct kretprobe_instance *ri, struct pt_regs *regs)
/* Replace the return addr with trampoline addr */
*sara = (unsigned long) &kretprobe_trampoline;
}
+NOKPROBE_SYMBOL(arch_prepare_kretprobe);

-static void __kprobes
-setup_singlestep(struct kprobe *p, struct pt_regs *regs, struct kprobe_ctlblk *kcb, int reenter)
+static void setup_singlestep(struct kprobe *p, struct pt_regs *regs,
+ struct kprobe_ctlblk *kcb, int reenter)
{
if (setup_detour_execution(p, regs, reenter))
return;
@@ -519,14 +526,15 @@ setup_singlestep(struct kprobe *p, struct pt_regs *regs, struct kprobe_ctlblk *k
else
regs->ip = (unsigned long)p->ainsn.insn;
}
+NOKPROBE_SYMBOL(setup_singlestep);

/*
* We have reentered the kprobe_handler(), since another probe was hit while
* within the handler. We save the original kprobes variables and just single
* step on the instruction of the new probe without calling any user handlers.
*/
-static int __kprobes
-reenter_kprobe(struct kprobe *p, struct pt_regs *regs, struct kprobe_ctlblk *kcb)
+static int reenter_kprobe(struct kprobe *p, struct pt_regs *regs,
+ struct kprobe_ctlblk *kcb)
{
switch (kcb->kprobe_status) {
case KPROBE_HIT_SSDONE:
@@ -554,12 +562,13 @@ reenter_kprobe(struct kprobe *p, struct pt_regs *regs, struct kprobe_ctlblk *kcb

return 1;
}
+NOKPROBE_SYMBOL(reenter_kprobe);

/*
* Interrupts are disabled on entry as trap3 is an interrupt gate and they
* remain disabled throughout this function.
*/
-int __kprobes kprobe_int3_handler(struct pt_regs *regs)
+int kprobe_int3_handler(struct pt_regs *regs)
{
kprobe_opcode_t *addr;
struct kprobe *p;
@@ -622,12 +631,13 @@ int __kprobes kprobe_int3_handler(struct pt_regs *regs)
preempt_enable_no_resched();
return 0;
}
+NOKPROBE_SYMBOL(kprobe_int3_handler);

/*
* When a retprobed function returns, this code saves registers and
* calls trampoline_handler() runs, which calls the kretprobe's handler.
*/
-static void __used __kprobes kretprobe_trampoline_holder(void)
+static void __used kretprobe_trampoline_holder(void)
{
asm volatile (
".global kretprobe_trampoline\n"
@@ -658,11 +668,13 @@ static void __used __kprobes kretprobe_trampoline_holder(void)
#endif
" ret\n");
}
+NOKPROBE_SYMBOL(kretprobe_trampoline_holder);
+NOKPROBE_SYMBOL(kretprobe_trampoline);

/*
* Called from kretprobe_trampoline
*/
-__visible __used __kprobes void *trampoline_handler(struct pt_regs *regs)
+__visible __used void *trampoline_handler(struct pt_regs *regs)
{
struct kretprobe_instance *ri = NULL;
struct hlist_head *head, empty_rp;
@@ -748,6 +760,7 @@ __visible __used __kprobes void *trampoline_handler(struct pt_regs *regs)
}
return (void *)orig_ret_address;
}
+NOKPROBE_SYMBOL(trampoline_handler);

/*
* Called after single-stepping. p->addr is the address of the
@@ -776,8 +789,8 @@ __visible __used __kprobes void *trampoline_handler(struct pt_regs *regs)
* jump instruction after the copied instruction, that jumps to the next
* instruction after the probepoint.
*/
-static void __kprobes
-resume_execution(struct kprobe *p, struct pt_regs *regs, struct kprobe_ctlblk *kcb)
+static void resume_execution(struct kprobe *p, struct pt_regs *regs,
+ struct kprobe_ctlblk *kcb)
{
unsigned long *tos = stack_addr(regs);
unsigned long copy_ip = (unsigned long)p->ainsn.insn;
@@ -852,12 +865,13 @@ resume_execution(struct kprobe *p, struct pt_regs *regs, struct kprobe_ctlblk *k
no_change:
restore_btf();
}
+NOKPROBE_SYMBOL(resume_execution);

/*
* Interrupts are disabled on entry as trap1 is an interrupt gate and they
* remain disabled throughout this function.
*/
-int __kprobes kprobe_debug_handler(struct pt_regs *regs)
+int kprobe_debug_handler(struct pt_regs *regs)
{
struct kprobe *cur = kprobe_running();
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
@@ -892,8 +906,9 @@ out:

return 1;
}
+NOKPROBE_SYMBOL(kprobe_debug_handler);

-int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
+int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
{
struct kprobe *cur = kprobe_running();
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
@@ -950,12 +965,13 @@ int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)

return 0;
}
+NOKPROBE_SYMBOL(kprobe_fault_handler);

/*
* Wrapper routine 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 = data;
int ret = NOTIFY_DONE;
@@ -975,8 +991,9 @@ kprobe_exceptions_notify(struct notifier_block *self, unsigned long val, void *d
}
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);
unsigned long addr;
@@ -1000,8 +1017,9 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
regs->ip = (unsigned long)(jp->entry);
return 1;
}
+NOKPROBE_SYMBOL(setjmp_pre_handler);

-void __kprobes jprobe_return(void)
+void jprobe_return(void)
{
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();

@@ -1017,8 +1035,10 @@ void __kprobes jprobe_return(void)
" nop \n"::"b"
(kcb->jprobe_saved_sp):"memory");
}
+NOKPROBE_SYMBOL(jprobe_return);
+NOKPROBE_SYMBOL(jprobe_return_end);

-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();
u8 *addr = (u8 *) (regs->ip - 1);
@@ -1046,6 +1066,7 @@ int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
}
return 0;
}
+NOKPROBE_SYMBOL(longjmp_break_handler);

bool arch_within_kprobe_blacklist(unsigned long addr)
{
diff --git a/arch/x86/kernel/kprobes/ftrace.c b/arch/x86/kernel/kprobes/ftrace.c
index dcaa131..717b02a 100644
--- a/arch/x86/kernel/kprobes/ftrace.c
+++ b/arch/x86/kernel/kprobes/ftrace.c
@@ -25,8 +25,9 @@

#include "common.h"

-static int __skip_singlestep(struct kprobe *p, struct pt_regs *regs,
- struct kprobe_ctlblk *kcb)
+static nokprobe_inline
+int __skip_singlestep(struct kprobe *p, struct pt_regs *regs,
+ struct kprobe_ctlblk *kcb)
{
/*
* Emulate singlestep (and also recover regs->ip)
@@ -41,18 +42,19 @@ static int __skip_singlestep(struct kprobe *p, struct pt_regs *regs,
return 1;
}

-int __kprobes skip_singlestep(struct kprobe *p, struct pt_regs *regs,
- struct kprobe_ctlblk *kcb)
+int skip_singlestep(struct kprobe *p, struct pt_regs *regs,
+ struct kprobe_ctlblk *kcb)
{
if (kprobe_ftrace(p))
return __skip_singlestep(p, regs, kcb);
else
return 0;
}
+NOKPROBE_SYMBOL(skip_singlestep);

/* Ftrace callback handler for kprobes */
-void __kprobes kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip,
- struct ftrace_ops *ops, struct pt_regs *regs)
+void kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip,
+ struct ftrace_ops *ops, struct pt_regs *regs)
{
struct kprobe *p;
struct kprobe_ctlblk *kcb;
@@ -84,6 +86,7 @@ void __kprobes kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip,
end:
local_irq_restore(flags);
}
+NOKPROBE_SYMBOL(kprobe_ftrace_handler);

int arch_prepare_kprobe_ftrace(struct kprobe *p)
{
diff --git a/arch/x86/kernel/kprobes/opt.c b/arch/x86/kernel/kprobes/opt.c
index fba7fb0..f304773 100644
--- a/arch/x86/kernel/kprobes/opt.c
+++ b/arch/x86/kernel/kprobes/opt.c
@@ -138,7 +138,8 @@ asm (
#define INT3_SIZE sizeof(kprobe_opcode_t)

/* Optimized kprobe call back function: called from optinsn */
-static void __kprobes optimized_callback(struct optimized_kprobe *op, struct pt_regs *regs)
+static void
+optimized_callback(struct optimized_kprobe *op, struct pt_regs *regs)
{
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
unsigned long flags;
@@ -168,6 +169,7 @@ static void __kprobes optimized_callback(struct optimized_kprobe *op, struct pt_
}
local_irq_restore(flags);
}
+NOKPROBE_SYMBOL(optimized_callback);

static int copy_optimized_instructions(u8 *dest, u8 *src)
{
@@ -424,8 +426,7 @@ extern void arch_unoptimize_kprobes(struct list_head *oplist,
}
}

-int __kprobes
-setup_detour_execution(struct kprobe *p, struct pt_regs *regs, int reenter)
+int setup_detour_execution(struct kprobe *p, struct pt_regs *regs, int reenter)
{
struct optimized_kprobe *op;

@@ -441,3 +442,4 @@ setup_detour_execution(struct kprobe *p, struct pt_regs *regs, int reenter)
}
return 0;
}
+NOKPROBE_SYMBOL(setup_detour_execution);
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 0331cb3..d81abcb 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -251,8 +251,9 @@ u32 kvm_read_and_reset_pf_reason(void)
return reason;
}
EXPORT_SYMBOL_GPL(kvm_read_and_reset_pf_reason);
+NOKPROBE_SYMBOL(kvm_read_and_reset_pf_reason);

-dotraplinkage void __kprobes
+dotraplinkage void
do_async_page_fault(struct pt_regs *regs, unsigned long error_code)
{
enum ctx_state prev_state;
@@ -276,6 +277,7 @@ do_async_page_fault(struct pt_regs *regs, unsigned long error_code)
break;
}
}
+NOKPROBE_SYMBOL(do_async_page_fault);

static void __init paravirt_ops_setup(void)
{
diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c
index b4872b9..c3e985d 100644
--- a/arch/x86/kernel/nmi.c
+++ b/arch/x86/kernel/nmi.c
@@ -110,7 +110,7 @@ static void nmi_max_handler(struct irq_work *w)
a->handler, whole_msecs, decimal_msecs);
}

-static int __kprobes nmi_handle(unsigned int type, struct pt_regs *regs, bool b2b)
+static int nmi_handle(unsigned int type, struct pt_regs *regs, bool b2b)
{
struct nmi_desc *desc = nmi_to_desc(type);
struct nmiaction *a;
@@ -146,6 +146,7 @@ static int __kprobes nmi_handle(unsigned int type, struct pt_regs *regs, bool b2
/* return total number of NMI events handled */
return handled;
}
+NOKPROBE_SYMBOL(nmi_handle);

int __register_nmi_handler(unsigned int type, struct nmiaction *action)
{
@@ -208,7 +209,7 @@ void unregister_nmi_handler(unsigned int type, const char *name)
}
EXPORT_SYMBOL_GPL(unregister_nmi_handler);

-static __kprobes void
+static void
pci_serr_error(unsigned char reason, struct pt_regs *regs)
{
/* check to see if anyone registered against these types of errors */
@@ -238,8 +239,9 @@ pci_serr_error(unsigned char reason, struct pt_regs *regs)
reason = (reason & NMI_REASON_CLEAR_MASK) | NMI_REASON_CLEAR_SERR;
outb(reason, NMI_REASON_PORT);
}
+NOKPROBE_SYMBOL(pci_serr_error);

-static __kprobes void
+static void
io_check_error(unsigned char reason, struct pt_regs *regs)
{
unsigned long i;
@@ -269,8 +271,9 @@ io_check_error(unsigned char reason, struct pt_regs *regs)
reason &= ~NMI_REASON_CLEAR_IOCHK;
outb(reason, NMI_REASON_PORT);
}
+NOKPROBE_SYMBOL(io_check_error);

-static __kprobes void
+static void
unknown_nmi_error(unsigned char reason, struct pt_regs *regs)
{
int handled;
@@ -298,11 +301,12 @@ unknown_nmi_error(unsigned char reason, struct pt_regs *regs)

pr_emerg("Dazed and confused, but trying to continue\n");
}
+NOKPROBE_SYMBOL(unknown_nmi_error);

static DEFINE_PER_CPU(bool, swallow_nmi);
static DEFINE_PER_CPU(unsigned long, last_nmi_rip);

-static __kprobes void default_do_nmi(struct pt_regs *regs)
+static void default_do_nmi(struct pt_regs *regs)
{
unsigned char reason = 0;
int handled;
@@ -401,6 +405,7 @@ static __kprobes void default_do_nmi(struct pt_regs *regs)
else
unknown_nmi_error(reason, regs);
}
+NOKPROBE_SYMBOL(default_do_nmi);

/*
* NMIs can hit breakpoints which will cause it to lose its
@@ -520,7 +525,7 @@ static inline void nmi_nesting_postprocess(void)
}
#endif

-dotraplinkage notrace __kprobes void
+dotraplinkage notrace void
do_nmi(struct pt_regs *regs, long error_code)
{
nmi_nesting_preprocess(regs);
@@ -537,6 +542,7 @@ do_nmi(struct pt_regs *regs, long error_code)
/* On i386, may loop back to preprocess */
nmi_nesting_postprocess();
}
+NOKPROBE_SYMBOL(do_nmi);

void stop_nmi(void)
{
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index ba9abe9..3c8ae7d 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -106,7 +106,7 @@ 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)
{
@@ -136,7 +136,7 @@ do_trap_no_signal(struct task_struct *tsk, int trapnr, char *str,
return -1;
}

-static void __kprobes
+static void
do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
long error_code, siginfo_t *info)
{
@@ -173,6 +173,7 @@ do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
else
force_sig(signr, tsk);
}
+NOKPROBE_SYMBOL(do_trap);

#define DO_ERROR(trapnr, signr, str, name) \
dotraplinkage void do_##name(struct pt_regs *regs, long error_code) \
@@ -263,7 +264,7 @@ 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;
@@ -309,9 +310,10 @@ 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;

@@ -355,6 +357,7 @@ 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
/*
@@ -362,7 +365,7 @@ 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 */
@@ -381,6 +384,7 @@ asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *eregs)
*regs = *eregs;
return regs;
}
+NOKPROBE_SYMBOL(sync_regs);
#endif

/*
@@ -407,7 +411,7 @@ 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;
@@ -491,6 +495,7 @@ 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
@@ -662,7 +667,7 @@ 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;
@@ -688,6 +693,7 @@ 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)
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 8e57229..f83bd0d 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -8,7 +8,7 @@
#include <linux/kdebug.h> /* oops_begin/end, ... */
#include <linux/module.h> /* search_exception_table */
#include <linux/bootmem.h> /* max_low_pfn */
-#include <linux/kprobes.h> /* __kprobes, ... */
+#include <linux/kprobes.h> /* NOKPROBE_SYMBOL, ... */
#include <linux/mmiotrace.h> /* kmmio_handler, ... */
#include <linux/perf_event.h> /* perf_sw_event */
#include <linux/hugetlb.h> /* hstate_index_to_shift */
@@ -45,7 +45,7 @@ enum x86_pf_error_code {
* Returns 0 if mmiotrace is disabled, or if the fault is not
* handled by mmiotrace:
*/
-static inline int __kprobes
+static nokprobe_inline int
kmmio_fault(struct pt_regs *regs, unsigned long addr)
{
if (unlikely(is_kmmio_active()))
@@ -54,7 +54,7 @@ kmmio_fault(struct pt_regs *regs, unsigned long addr)
return 0;
}

-static inline int __kprobes kprobes_fault(struct pt_regs *regs)
+static nokprobe_inline int kprobes_fault(struct pt_regs *regs)
{
int ret = 0;

@@ -261,7 +261,7 @@ void vmalloc_sync_all(void)
*
* Handle a fault on the vmalloc or module mapping area
*/
-static noinline __kprobes int vmalloc_fault(unsigned long address)
+static noinline int vmalloc_fault(unsigned long address)
{
unsigned long pgd_paddr;
pmd_t *pmd_k;
@@ -291,6 +291,7 @@ static noinline __kprobes int vmalloc_fault(unsigned long address)

return 0;
}
+NOKPROBE_SYMBOL(vmalloc_fault);

/*
* Did it hit the DOS screen memory VA from vm86 mode?
@@ -358,7 +359,7 @@ void vmalloc_sync_all(void)
*
* This assumes no large pages in there.
*/
-static noinline __kprobes int vmalloc_fault(unsigned long address)
+static noinline int vmalloc_fault(unsigned long address)
{
pgd_t *pgd, *pgd_ref;
pud_t *pud, *pud_ref;
@@ -425,6 +426,7 @@ static noinline __kprobes int vmalloc_fault(unsigned long address)

return 0;
}
+NOKPROBE_SYMBOL(vmalloc_fault);

#ifdef CONFIG_CPU_SUP_AMD
static const char errata93_warning[] =
@@ -927,7 +929,7 @@ static int spurious_fault_check(unsigned long error_code, pte_t *pte)
* There are no security implications to leaving a stale TLB when
* increasing the permissions on a page.
*/
-static noinline __kprobes int
+static noinline int
spurious_fault(unsigned long error_code, unsigned long address)
{
pgd_t *pgd;
@@ -975,6 +977,7 @@ spurious_fault(unsigned long error_code, unsigned long address)

return ret;
}
+NOKPROBE_SYMBOL(spurious_fault);

int show_unhandled_signals = 1;

@@ -1030,7 +1033,7 @@ static inline bool smap_violation(int error_code, struct pt_regs *regs)
* {,trace_}do_page_fault() have notrace on. Having this an actual function
* guarantees there's a function trace entry.
*/
-static void __kprobes noinline
+static noinline void
__do_page_fault(struct pt_regs *regs, unsigned long error_code,
unsigned long address)
{
@@ -1253,8 +1256,9 @@ good_area:

up_read(&mm->mmap_sem);
}
+NOKPROBE_SYMBOL(__do_page_fault);

-dotraplinkage void __kprobes notrace
+dotraplinkage void notrace
do_page_fault(struct pt_regs *regs, unsigned long error_code)
{
unsigned long address = read_cr2(); /* Get the faulting address */
@@ -1272,10 +1276,12 @@ do_page_fault(struct pt_regs *regs, unsigned long error_code)
__do_page_fault(regs, error_code, address);
exception_exit(prev_state);
}
+NOKPROBE_SYMBOL(do_page_fault);

#ifdef CONFIG_TRACING
-static void trace_page_fault_entries(unsigned long address, struct pt_regs *regs,
- unsigned long error_code)
+static nokprobe_inline void
+trace_page_fault_entries(unsigned long address, struct pt_regs *regs,
+ unsigned long error_code)
{
if (user_mode(regs))
trace_page_fault_user(address, regs, error_code);
@@ -1283,7 +1289,7 @@ static void trace_page_fault_entries(unsigned long address, struct pt_regs *regs
trace_page_fault_kernel(address, regs, error_code);
}

-dotraplinkage void __kprobes notrace
+dotraplinkage void notrace
trace_do_page_fault(struct pt_regs *regs, unsigned long error_code)
{
/*
@@ -1300,4 +1306,5 @@ trace_do_page_fault(struct pt_regs *regs, unsigned long error_code)
__do_page_fault(regs, error_code, address);
exception_exit(prev_state);
}
+NOKPROBE_SYMBOL(trace_do_page_fault);
#endif /* CONFIG_TRACING */
--
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