diff options
34 files changed, 583 insertions, 432 deletions
diff --git a/Documentation/kprobes.txt b/Documentation/kprobes.txt index 0cfb00f..4bbeca8 100644 --- a/Documentation/kprobes.txt +++ b/Documentation/kprobes.txt @@ -22,8 +22,9 @@ Appendix B: The kprobes sysctl interface Kprobes enables you to dynamically break into any kernel routine and collect debugging and performance information non-disruptively. You -can trap at almost any kernel code address, specifying a handler +can trap at almost any kernel code address(*), specifying a handler routine to be invoked when the breakpoint is hit. +(*: some parts of the kernel code can not be trapped, see 1.5 Blacklist) There are currently three types of probes: kprobes, jprobes, and kretprobes (also called return probes). A kprobe can be inserted @@ -273,6 +274,19 @@ using one of the following techniques: or - Execute 'sysctl -w debug.kprobes_optimization=n' +1.5 Blacklist + +Kprobes can probe most of the kernel except itself. This means +that there are some functions where kprobes cannot probe. Probing +(trapping) such functions can cause a recursive trap (e.g. double +fault) or the nested probe handler may never be called. +Kprobes manages such functions as a blacklist. +If you want to add a function into the blacklist, you just need +to (1) include linux/kprobes.h and (2) use NOKPROBE_SYMBOL() macro +to specify a blacklisted function. +Kprobes checks the given probe address against the blacklist and +rejects registering it, if the given address is in the blacklist. + 2. Architectures Supported Kprobes, jprobes, and return probes are implemented on the following diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h index 4582e8e..7730c1c 100644 --- a/arch/x86/include/asm/asm.h +++ b/arch/x86/include/asm/asm.h @@ -57,6 +57,12 @@ .long (from) - . ; \ .long (to) - . + 0x7ffffff0 ; \ .popsection + +# define _ASM_NOKPROBE(entry) \ + .pushsection "_kprobe_blacklist","aw" ; \ + _ASM_ALIGN ; \ + _ASM_PTR (entry); \ + .popsection #else # define _ASM_EXTABLE(from,to) \ " .pushsection \"__ex_table\",\"a\"\n" \ @@ -71,6 +77,7 @@ " .long (" #from ") - .\n" \ " .long (" #to ") - . + 0x7ffffff0\n" \ " .popsection\n" +/* For C file, we already have NOKPROBE_SYMBOL macro */ #endif #endif /* _ASM_X86_ASM_H */ diff --git a/arch/x86/include/asm/kprobes.h b/arch/x86/include/asm/kprobes.h index 9454c16..53cdfb2 100644 --- a/arch/x86/include/asm/kprobes.h +++ b/arch/x86/include/asm/kprobes.h @@ -116,4 +116,6 @@ struct kprobe_ctlblk { extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr); extern int kprobe_exceptions_notify(struct notifier_block *self, unsigned long val, void *data); +extern int kprobe_int3_handler(struct pt_regs *regs); +extern int kprobe_debug_handler(struct pt_regs *regs); #endif /* _ASM_X86_KPROBES_H */ diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h index a7b212d..cf69d05 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/alternative.c b/arch/x86/kernel/alternative.c index df94598..703130f 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -5,7 +5,6 @@ #include <linux/mutex.h> #include <linux/list.h> #include <linux/stringify.h> -#include <linux/kprobes.h> #include <linux/mm.h> #include <linux/vmalloc.h> #include <linux/memory.h> @@ -551,7 +550,7 @@ void *__init_or_module text_poke_early(void *addr, const void *opcode, * * Note: Must be called under text_mutex. */ -void *__kprobes text_poke(void *addr, const void *opcode, size_t len) +void *text_poke(void *addr, const void *opcode, size_t len) { unsigned long flags; char *vaddr; 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/common.c b/arch/x86/kernel/cpu/common.c index a135239..5af696d 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -8,6 +8,7 @@ #include <linux/delay.h> #include <linux/sched.h> #include <linux/init.h> +#include <linux/kprobes.h> #include <linux/kgdb.h> #include <linux/smp.h> #include <linux/io.h> @@ -1160,6 +1161,7 @@ int is_debug_stack(unsigned long addr) (addr <= __get_cpu_var(debug_stack_addr) && addr > (__get_cpu_var(debug_stack_addr) - DEBUG_STKSZ)); } +NOKPROBE_SYMBOL(is_debug_stack); DEFINE_PER_CPU(u32, debug_idt_ctr); @@ -1168,6 +1170,7 @@ void debug_stack_set_zero(void) this_cpu_inc(debug_idt_ctr); load_current_idt(); } +NOKPROBE_SYMBOL(debug_stack_set_zero); void debug_stack_reset(void) { @@ -1176,6 +1179,7 @@ void debug_stack_reset(void) if (this_cpu_dec_return(debug_idt_ctr) == 0) load_current_idt(); } +NOKPROBE_SYMBOL(debug_stack_reset); #else /* CONFIG_X86_64 */ diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index 89f3b7c..32029e3 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -1293,7 +1293,7 @@ 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; @@ -1311,6 +1311,7 @@ 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/entry_32.S b/arch/x86/kernel/entry_32.S index a2a4f46..0ca5bf1 100644 --- a/arch/x86/kernel/entry_32.S +++ b/arch/x86/kernel/entry_32.S @@ -315,10 +315,6 @@ ENTRY(ret_from_kernel_thread) ENDPROC(ret_from_kernel_thread) /* - * Interrupt exit functions should be protected against kprobes - */ - .pushsection .kprobes.text, "ax" -/* * Return to user mode is not as complex as all this looks, * but we want the default path for a system call return to * go as quickly as possible which is why some of this is @@ -372,10 +368,6 @@ need_resched: END(resume_kernel) #endif CFI_ENDPROC -/* - * End of kprobes section - */ - .popsection /* SYSENTER_RETURN points to after the "sysenter" instruction in the vsyscall page. See vsyscall-sysentry.S, which defines the symbol. */ @@ -495,10 +487,6 @@ sysexit_audit: PTGS_TO_GS_EX ENDPROC(ia32_sysenter_target) -/* - * syscall stub including irq exit should be protected against kprobes - */ - .pushsection .kprobes.text, "ax" # system call handler stub ENTRY(system_call) RING0_INT_FRAME # can't unwind into user space anyway @@ -691,10 +679,6 @@ syscall_badsys: jmp resume_userspace END(syscall_badsys) CFI_ENDPROC -/* - * End of kprobes section - */ - .popsection .macro FIXUP_ESPFIX_STACK /* @@ -781,10 +765,6 @@ common_interrupt: ENDPROC(common_interrupt) CFI_ENDPROC -/* - * Irq entries should be protected against kprobes - */ - .pushsection .kprobes.text, "ax" #define BUILD_INTERRUPT3(name, nr, fn) \ ENTRY(name) \ RING0_INT_FRAME; \ @@ -961,10 +941,6 @@ ENTRY(spurious_interrupt_bug) jmp error_code CFI_ENDPROC END(spurious_interrupt_bug) -/* - * End of kprobes section - */ - .popsection #ifdef CONFIG_XEN /* Xen doesn't set %esp to be precisely what the normal sysenter @@ -1239,11 +1215,6 @@ return_to_handler: jmp *%ecx #endif -/* - * Some functions should be protected against kprobes - */ - .pushsection .kprobes.text, "ax" - #ifdef CONFIG_TRACING ENTRY(trace_page_fault) RING0_EC_FRAME @@ -1453,7 +1424,3 @@ ENTRY(async_page_fault) END(async_page_fault) #endif -/* - * End of kprobes section - */ - .popsection diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index 1e96c36..43bb389 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -487,8 +487,6 @@ ENDPROC(native_usergs_sysret64) TRACE_IRQS_OFF .endm -/* save complete stack frame */ - .pushsection .kprobes.text, "ax" ENTRY(save_paranoid) XCPT_FRAME 1 RDI+8 cld @@ -517,7 +515,6 @@ ENTRY(save_paranoid) 1: ret CFI_ENDPROC END(save_paranoid) - .popsection /* * A newly forked process directly context switches into this address. @@ -975,10 +972,6 @@ END(interrupt) call \func .endm -/* - * Interrupt entry/exit should be protected against kprobes - */ - .pushsection .kprobes.text, "ax" /* * The interrupt stubs push (~vector+0x80) onto the stack and * then jump to common_interrupt. @@ -1113,10 +1106,6 @@ ENTRY(retint_kernel) CFI_ENDPROC END(common_interrupt) -/* - * End of kprobes section - */ - .popsection /* * APIC interrupts. @@ -1477,11 +1466,6 @@ apicinterrupt3 HYPERVISOR_CALLBACK_VECTOR \ hyperv_callback_vector hyperv_vector_handler #endif /* CONFIG_HYPERV */ -/* - * Some functions should be protected against kprobes - */ - .pushsection .kprobes.text, "ax" - paranoidzeroentry_ist debug do_debug DEBUG_STACK paranoidzeroentry_ist int3 do_int3 DEBUG_STACK paranoiderrorentry stack_segment do_stack_segment @@ -1898,7 +1882,3 @@ ENTRY(ignore_sysret) CFI_ENDPROC END(ignore_sysret) -/* - * End of kprobes section - */ - .popsection diff --git a/arch/x86/kernel/hw_breakpoint.c b/arch/x86/kernel/hw_breakpoint.c index a67b47c..5f9cf20 100644 --- a/arch/x86/kernel/hw_breakpoint.c +++ b/arch/x86/kernel/hw_breakpoint.c @@ -32,7 +32,6 @@ #include <linux/irqflags.h> #include <linux/notifier.h> #include <linux/kallsyms.h> -#include <linux/kprobes.h> #include <linux/percpu.h> #include <linux/kdebug.h> #include <linux/kernel.h> @@ -424,7 +423,7 @@ EXPORT_SYMBOL_GPL(hw_breakpoint_restore); * NOTIFY_STOP returned for all other cases * */ -static int __kprobes hw_breakpoint_handler(struct die_args *args) +static int hw_breakpoint_handler(struct die_args *args) { int i, cpu, rc = NOTIFY_STOP; struct perf_event *bp; @@ -511,7 +510,7 @@ static int __kprobes hw_breakpoint_handler(struct die_args *args) /* * Handle debug exception notifications. */ -int __kprobes hw_breakpoint_exceptions_notify( +int hw_breakpoint_exceptions_notify( struct notifier_block *unused, unsigned long val, void *data) { if (val != DIE_DEBUG) diff --git a/arch/x86/kernel/kprobes/core.c b/arch/x86/kernel/kprobes/core.c index 61b17dc..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; @@ -154,12 +157,13 @@ 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. * RIP relative instructions are adjusted at copying time in 64 bits mode */ -int __kprobes can_boost(kprobe_opcode_t *opcodes) +int can_boost(kprobe_opcode_t *opcodes) { kprobe_opcode_t opcode; kprobe_opcode_t *orig_opcodes = opcodes; @@ -260,7 +264,7 @@ unsigned long recover_probed_instruction(kprobe_opcode_t *buf, unsigned long add } /* Check if paddr is at an instruction boundary */ -static int __kprobes can_probe(unsigned long paddr) +static int can_probe(unsigned long paddr) { unsigned long addr, __addr, offset = 0; struct insn insn; @@ -299,7 +303,7 @@ static int __kprobes can_probe(unsigned long paddr) /* * Returns non-zero if opcode modifies the interrupt flag. */ -static int __kprobes is_IF_modifier(kprobe_opcode_t *insn) +static int is_IF_modifier(kprobe_opcode_t *insn) { /* Skip prefixes */ insn = skip_prefixes(insn); @@ -322,7 +326,7 @@ static int __kprobes is_IF_modifier(kprobe_opcode_t *insn) * If not, return null. * Only applicable to 64-bit x86. */ -int __kprobes __copy_instruction(u8 *dest, u8 *src) +int __copy_instruction(u8 *dest, u8 *src) { struct insn insn; kprobe_opcode_t buf[MAX_INSN_SIZE]; @@ -365,7 +369,7 @@ int __kprobes __copy_instruction(u8 *dest, u8 *src) return insn.length; } -static int __kprobes arch_copy_kprobe(struct kprobe *p) +static int arch_copy_kprobe(struct kprobe *p) { int ret; @@ -392,7 +396,7 @@ static int __kprobes arch_copy_kprobe(struct kprobe *p) return 0; } -int __kprobes arch_prepare_kprobe(struct kprobe *p) +int arch_prepare_kprobe(struct kprobe *p) { if (alternatives_text_reserved(p->addr, p->addr)) return -EINVAL; @@ -407,17 +411,17 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p) return arch_copy_kprobe(p); } -void __kprobes arch_arm_kprobe(struct kprobe *p) +void arch_arm_kprobe(struct kprobe *p) { text_poke(p->addr, ((unsigned char []){BREAKPOINT_INSTRUCTION}), 1); } -void __kprobes arch_disarm_kprobe(struct kprobe *p) +void arch_disarm_kprobe(struct kprobe *p) { text_poke(p->addr, &p->opcode, 1); } -void __kprobes arch_remove_kprobe(struct kprobe *p) +void arch_remove_kprobe(struct kprobe *p) { if (p->ainsn.insn) { free_insn_slot(p->ainsn.insn, (p->ainsn.boostable == 1)); @@ -425,7 +429,8 @@ void __kprobes 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; @@ -519,22 +526,24 @@ 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: case KPROBE_HIT_ACTIVE: + case KPROBE_HIT_SS: kprobes_inc_nmissed_count(p); setup_singlestep(p, regs, kcb, 1); break; - case KPROBE_HIT_SS: + case KPROBE_REENTER: /* A probe has been hit in the codepath leading up to, or just * after, single-stepping of a probed instruction. This entire * codepath should strictly reside in .kprobes.text section. @@ -553,12 +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. */ -static int __kprobes kprobe_handler(struct pt_regs *regs) +int kprobe_int3_handler(struct pt_regs *regs) { kprobe_opcode_t *addr; struct kprobe *p; @@ -621,12 +631,13 @@ static int __kprobes kprobe_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" @@ -657,11 +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; @@ -747,6 +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 @@ -775,8 +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; @@ -851,12 +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. */ -static int __kprobes post_kprobe_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(); @@ -891,8 +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(); @@ -949,12 +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; @@ -962,22 +979,7 @@ kprobe_exceptions_notify(struct notifier_block *self, unsigned long val, void *d if (args->regs && user_mode_vm(args->regs)) return ret; - switch (val) { - case DIE_INT3: - if (kprobe_handler(args->regs)) - ret = NOTIFY_STOP; - break; - case DIE_DEBUG: - if (post_kprobe_handler(args->regs)) { - /* - * Reset the BS bit in dr6 (pointed by args->err) to - * denote completion of processing - */ - (*(unsigned long *)ERR_PTR(args->err)) &= ~DR_STEP; - ret = NOTIFY_STOP; - } - break; - case DIE_GPF: + if (val == DIE_GPF) { /* * To be potentially processing a kprobe fault and to * trust the result from kprobe_running(), we have @@ -986,14 +988,12 @@ kprobe_exceptions_notify(struct notifier_block *self, unsigned long val, void *d if (!preemptible() && kprobe_running() && kprobe_fault_handler(args->regs, args->trapnr)) ret = NOTIFY_STOP; - break; - default: - break; } 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; @@ -1017,8 +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(); @@ -1034,8 +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); @@ -1063,13 +1066,22 @@ 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) +{ + return (addr >= (unsigned long)__kprobes_text_start && + addr < (unsigned long)__kprobes_text_end) || + (addr >= (unsigned long)__entry_text_start && + addr < (unsigned long)__entry_text_end); +} int __init arch_init_kprobes(void) { return 0; } -int __kprobes arch_trampoline_kprobe(struct kprobe *p) +int arch_trampoline_kprobe(struct kprobe *p) { return 0; } diff --git a/arch/x86/kernel/kprobes/ftrace.c b/arch/x86/kernel/kprobes/ftrace.c index 23ef5c5..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; @@ -84,8 +86,9 @@ void __kprobes kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip, end: local_irq_restore(flags); } +NOKPROBE_SYMBOL(kprobe_ftrace_handler); -int __kprobes arch_prepare_kprobe_ftrace(struct kprobe *p) +int arch_prepare_kprobe_ftrace(struct kprobe *p) { p->ainsn.insn = NULL; p->ainsn.boostable = -1; diff --git a/arch/x86/kernel/kprobes/opt.c b/arch/x86/kernel/kprobes/opt.c index 898160b..f304773 100644 --- a/arch/x86/kernel/kprobes/opt.c +++ b/arch/x86/kernel/kprobes/opt.c @@ -77,7 +77,7 @@ found: } /* Insert a move instruction which sets a pointer to eax/rdi (1st arg). */ -static void __kprobes synthesize_set_arg1(kprobe_opcode_t *addr, unsigned long val) +static void synthesize_set_arg1(kprobe_opcode_t *addr, unsigned long val) { #ifdef CONFIG_X86_64 *addr++ = 0x48; @@ -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; @@ -168,8 +169,9 @@ static void __kprobes optimized_callback(struct optimized_kprobe *op, struct pt_ } local_irq_restore(flags); } +NOKPROBE_SYMBOL(optimized_callback); -static int __kprobes copy_optimized_instructions(u8 *dest, u8 *src) +static int copy_optimized_instructions(u8 *dest, u8 *src) { int len = 0, ret; @@ -189,7 +191,7 @@ static int __kprobes copy_optimized_instructions(u8 *dest, u8 *src) } /* Check whether insn is indirect jump */ -static int __kprobes insn_is_indirect_jump(struct insn *insn) +static int insn_is_indirect_jump(struct insn *insn) { return ((insn->opcode.bytes[0] == 0xff && (X86_MODRM_REG(insn->modrm.value) & 6) == 4) || /* Jump */ @@ -224,7 +226,7 @@ static int insn_jump_into_range(struct insn *insn, unsigned long start, int len) } /* Decode whole function to ensure any instructions don't jump into target */ -static int __kprobes can_optimize(unsigned long paddr) +static int can_optimize(unsigned long paddr) { unsigned long addr, size = 0, offset = 0; struct insn insn; @@ -275,7 +277,7 @@ static int __kprobes can_optimize(unsigned long paddr) } /* Check optimized_kprobe can actually be optimized. */ -int __kprobes arch_check_optimized_kprobe(struct optimized_kprobe *op) +int arch_check_optimized_kprobe(struct optimized_kprobe *op) { int i; struct kprobe *p; @@ -290,15 +292,15 @@ int __kprobes arch_check_optimized_kprobe(struct optimized_kprobe *op) } /* Check the addr is within the optimized instructions. */ -int __kprobes -arch_within_optimized_kprobe(struct optimized_kprobe *op, unsigned long addr) +int arch_within_optimized_kprobe(struct optimized_kprobe *op, + unsigned long addr) { return ((unsigned long)op->kp.addr <= addr && (unsigned long)op->kp.addr + op->optinsn.size > addr); } /* Free optimized instruction slot */ -static __kprobes +static void __arch_remove_optimized_kprobe(struct optimized_kprobe *op, int dirty) { if (op->optinsn.insn) { @@ -308,7 +310,7 @@ void __arch_remove_optimized_kprobe(struct optimized_kprobe *op, int dirty) } } -void __kprobes arch_remove_optimized_kprobe(struct optimized_kprobe *op) +void arch_remove_optimized_kprobe(struct optimized_kprobe *op) { __arch_remove_optimized_kprobe(op, 1); } @@ -318,7 +320,7 @@ void __kprobes arch_remove_optimized_kprobe(struct optimized_kprobe *op) * Target instructions MUST be relocatable (checked inside) * This is called when new aggr(opt)probe is allocated or reused. */ -int __kprobes arch_prepare_optimized_kprobe(struct optimized_kprobe *op) +int arch_prepare_optimized_kprobe(struct optimized_kprobe *op) { u8 *buf; int ret; @@ -372,7 +374,7 @@ int __kprobes arch_prepare_optimized_kprobe(struct optimized_kprobe *op) * Replace breakpoints (int3) with relative jumps. * Caller must call with locking kprobe_mutex and text_mutex. */ -void __kprobes arch_optimize_kprobes(struct list_head *oplist) +void arch_optimize_kprobes(struct list_head *oplist) { struct optimized_kprobe *op, *tmp; u8 insn_buf[RELATIVEJUMP_SIZE]; @@ -398,7 +400,7 @@ void __kprobes arch_optimize_kprobes(struct list_head *oplist) } /* Replace a relative jump with a breakpoint (int3). */ -void __kprobes arch_unoptimize_kprobe(struct optimized_kprobe *op) +void arch_unoptimize_kprobe(struct optimized_kprobe *op) { u8 insn_buf[RELATIVEJUMP_SIZE]; @@ -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/paravirt.c b/arch/x86/kernel/paravirt.c index 1b10af8..548d25f 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -23,6 +23,7 @@ #include <linux/efi.h> #include <linux/bcd.h> #include <linux/highmem.h> +#include <linux/kprobes.h> #include <asm/bug.h> #include <asm/paravirt.h> @@ -389,6 +390,11 @@ __visible struct pv_cpu_ops pv_cpu_ops = { .end_context_switch = paravirt_nop, }; +/* At this point, native_get/set_debugreg has real function entries */ +NOKPROBE_SYMBOL(native_get_debugreg); +NOKPROBE_SYMBOL(native_set_debugreg); +NOKPROBE_SYMBOL(native_load_idt); + struct pv_apic_ops pv_apic_ops = { #ifdef CONFIG_X86_LOCAL_APIC .startup_ipi_hook = paravirt_nop, diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index 3fdb205..461926b 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -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) diff --git a/arch/x86/lib/thunk_32.S b/arch/x86/lib/thunk_32.S index 2930ae0..28f85c91 100644 --- a/arch/x86/lib/thunk_32.S +++ b/arch/x86/lib/thunk_32.S @@ -4,8 +4,8 @@ * (inspired by Andi Kleen's thunk_64.S) * Subject to the GNU public license, v.2. No warranty of any kind. */ - #include <linux/linkage.h> + #include <asm/asm.h> #ifdef CONFIG_TRACE_IRQFLAGS /* put return address in eax (arg1) */ @@ -22,6 +22,7 @@ popl %ecx popl %eax ret + _ASM_NOKPROBE(\name) .endm thunk_ra trace_hardirqs_on_thunk,trace_hardirqs_on_caller diff --git a/arch/x86/lib/thunk_64.S b/arch/x86/lib/thunk_64.S index a63efd6..92d9fea 100644 --- a/arch/x86/lib/thunk_64.S +++ b/arch/x86/lib/thunk_64.S @@ -8,6 +8,7 @@ #include <linux/linkage.h> #include <asm/dwarf2.h> #include <asm/calling.h> +#include <asm/asm.h> /* rdi: arg1 ... normal C conventions. rax is saved/restored. */ .macro THUNK name, func, put_ret_addr_in_rdi=0 @@ -25,6 +26,7 @@ call \func jmp restore CFI_ENDPROC + _ASM_NOKPROBE(\name) .endm #ifdef CONFIG_TRACE_IRQFLAGS @@ -43,3 +45,4 @@ restore: RESTORE_ARGS ret CFI_ENDPROC + _ASM_NOKPROBE(restore) 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 */ diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 146e4ff..8e0204a 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -109,6 +109,15 @@ #define BRANCH_PROFILE() #endif +#ifdef CONFIG_KPROBES +#define KPROBE_BLACKLIST() . = ALIGN(8); \ + VMLINUX_SYMBOL(__start_kprobe_blacklist) = .; \ + *(_kprobe_blacklist) \ + VMLINUX_SYMBOL(__stop_kprobe_blacklist) = .; +#else +#define KPROBE_BLACKLIST() +#endif + #ifdef CONFIG_EVENT_TRACING #define FTRACE_EVENTS() . = ALIGN(8); \ VMLINUX_SYMBOL(__start_ftrace_events) = .; \ @@ -507,6 +516,7 @@ *(.init.rodata) \ FTRACE_EVENTS() \ TRACE_SYSCALLS() \ + KPROBE_BLACKLIST() \ MEM_DISCARD(init.rodata) \ CLK_OF_TABLES() \ RESERVEDMEM_OF_TABLES() \ diff --git a/include/linux/compiler.h b/include/linux/compiler.h index ee7239e..0300c0f 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -374,7 +374,9 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect); /* Ignore/forbid kprobes attach on very low level functions marked by this attribute: */ #ifdef CONFIG_KPROBES # define __kprobes __attribute__((__section__(".kprobes.text"))) +# define nokprobe_inline __always_inline #else # define __kprobes +# define nokprobe_inline inline #endif #endif /* __LINUX_COMPILER_H */ diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h index 925eaf2..e059507 100644 --- a/include/linux/kprobes.h +++ b/include/linux/kprobes.h @@ -205,10 +205,10 @@ struct kretprobe_blackpoint { void *addr; }; -struct kprobe_blackpoint { - const char *name; +struct kprobe_blacklist_entry { + struct list_head list; unsigned long start_addr; - unsigned long range; + unsigned long end_addr; }; #ifdef CONFIG_KPROBES @@ -265,6 +265,7 @@ extern void arch_disarm_kprobe(struct kprobe *p); extern int arch_init_kprobes(void); extern void show_registers(struct pt_regs *regs); extern void kprobes_inc_nmissed_count(struct kprobe *p); +extern bool arch_within_kprobe_blacklist(unsigned long addr); struct kprobe_insn_cache { struct mutex mutex; @@ -476,4 +477,18 @@ static inline int enable_jprobe(struct jprobe *jp) return enable_kprobe(&jp->kp); } +#ifdef CONFIG_KPROBES +/* + * Blacklist ganerating macro. Specify functions which is not probed + * by using this macro. + */ +#define __NOKPROBE_SYMBOL(fname) \ +static unsigned long __used \ + __attribute__((section("_kprobe_blacklist"))) \ + _kbl_addr_##fname = (unsigned long)fname; +#define NOKPROBE_SYMBOL(fname) __NOKPROBE_SYMBOL(fname) +#else +#define NOKPROBE_SYMBOL(fname) +#endif + #endif /* _LINUX_KPROBES_H */ diff --git a/kernel/kprobes.c b/kernel/kprobes.c index ceeadfc..3214289 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -86,21 +86,8 @@ static raw_spinlock_t *kretprobe_table_lock_ptr(unsigned long hash) return &(kretprobe_table_locks[hash].lock); } -/* - * Normally, functions that we'd want to prohibit kprobes in, are marked - * __kprobes. But, there are cases where such functions already belong to - * a different section (__sched for preempt_schedule) - * - * For such cases, we now have a blacklist - */ -static struct kprobe_blackpoint kprobe_blacklist[] = { - {"preempt_schedule",}, - {"native_get_debugreg",}, - {"irq_entries_start",}, - {"common_interrupt",}, - {"mcount",}, /* mcount can be called from everywhere */ - {NULL} /* Terminator */ -}; +/* Blacklist -- list of struct kprobe_blacklist_entry */ +static LIST_HEAD(kprobe_blacklist); #ifdef __ARCH_WANT_KPROBES_INSN_SLOT /* @@ -151,13 +138,13 @@ struct kprobe_insn_cache kprobe_insn_slots = { .insn_size = MAX_INSN_SIZE, .nr_garbage = 0, }; -static int __kprobes collect_garbage_slots(struct kprobe_insn_cache *c); +static int collect_garbage_slots(struct kprobe_insn_cache *c); /** * __get_insn_slot() - Find a slot on an executable page for an instruction. * We allocate an executable page if there's no room on existing ones. */ -kprobe_opcode_t __kprobes *__get_insn_slot(struct kprobe_insn_cache *c) +kprobe_opcode_t *__get_insn_slot(struct kprobe_insn_cache *c) { struct kprobe_insn_page *kip; kprobe_opcode_t *slot = NULL; @@ -214,7 +201,7 @@ out: } /* Return 1 if all garbages are collected, otherwise 0. */ -static int __kprobes collect_one_slot(struct kprobe_insn_page *kip, int idx) +static int collect_one_slot(struct kprobe_insn_page *kip, int idx) { kip->slot_used[idx] = SLOT_CLEAN; kip->nused--; @@ -235,7 +222,7 @@ static int __kprobes collect_one_slot(struct kprobe_insn_page *kip, int idx) return 0; } -static int __kprobes collect_garbage_slots(struct kprobe_insn_cache *c) +static int collect_garbage_slots(struct kprobe_insn_cache *c) { struct kprobe_insn_page *kip, *next; @@ -257,8 +244,8 @@ static int __kprobes collect_garbage_slots(struct kprobe_insn_cache *c) return 0; } -void __kprobes __free_insn_slot(struct kprobe_insn_cache *c, - kprobe_opcode_t *slot, int dirty) +void __free_insn_slot(struct kprobe_insn_cache *c, + kprobe_opcode_t *slot, int dirty) { struct kprobe_insn_page *kip; @@ -314,7 +301,7 @@ static inline void reset_kprobe_instance(void) * OR * - with preemption disabled - from arch/xxx/kernel/kprobes.c */ -struct kprobe __kprobes *get_kprobe(void *addr) +struct kprobe *get_kprobe(void *addr) { struct hlist_head *head; struct kprobe *p; @@ -327,8 +314,9 @@ struct kprobe __kprobes *get_kprobe(void *addr) return NULL; } +NOKPROBE_SYMBOL(get_kprobe); -static int __kprobes aggr_pre_handler(struct kprobe *p, struct pt_regs *regs); +static int aggr_pre_handler(struct kprobe *p, struct pt_regs *regs); /* Return true if the kprobe is an aggregator */ static inline int kprobe_aggrprobe(struct kprobe *p) @@ -360,7 +348,7 @@ static bool kprobes_allow_optimization; * Call all pre_handler on the list, but ignores its return value. * This must be called from arch-dep optimized caller. */ -void __kprobes opt_pre_handler(struct kprobe *p, struct pt_regs *regs) +void opt_pre_handler(struct kprobe *p, struct pt_regs *regs) { struct kprobe *kp; @@ -372,9 +360,10 @@ void __kprobes opt_pre_handler(struct kprobe *p, struct pt_regs *regs) reset_kprobe_instance(); } } +NOKPROBE_SYMBOL(opt_pre_handler); /* Free optimized instructions and optimized_kprobe */ -static __kprobes void free_aggr_kprobe(struct kprobe *p) +static void free_aggr_kprobe(struct kprobe *p) { struct optimized_kprobe *op; @@ -412,7 +401,7 @@ static inline int kprobe_disarmed(struct kprobe *p) } /* Return true(!0) if the probe is queued on (un)optimizing lists */ -static int __kprobes kprobe_queued(struct kprobe *p) +static int kprobe_queued(struct kprobe *p) { struct optimized_kprobe *op; @@ -428,7 +417,7 @@ static int __kprobes kprobe_queued(struct kprobe *p) * Return an optimized kprobe whose optimizing code replaces * instructions including addr (exclude breakpoint). */ -static struct kprobe *__kprobes get_optimized_kprobe(unsigned long addr) +static struct kprobe *get_optimized_kprobe(unsigned long addr) { int i; struct kprobe *p = NULL; @@ -460,7 +449,7 @@ static DECLARE_DELAYED_WORK(optimizing_work, kprobe_optimizer); * Optimize (replace a breakpoint with a jump) kprobes listed on * optimizing_list. */ -static __kprobes void do_optimize_kprobes(void) +static void do_optimize_kprobes(void) { /* Optimization never be done when disarmed */ if (kprobes_all_disarmed || !kprobes_allow_optimization || @@ -488,7 +477,7 @@ static __kprobes void do_optimize_kprobes(void) * Unoptimize (replace a jump with a breakpoint and remove the breakpoint * if need) kprobes listed on unoptimizing_list. */ -static __kprobes void do_unoptimize_kprobes(void) +static void do_unoptimize_kprobes(void) { struct optimized_kprobe *op, *tmp; @@ -520,7 +509,7 @@ static __kprobes void do_unoptimize_kprobes(void) } /* Reclaim all kprobes on the free_list */ -static __kprobes void do_free_cleaned_kprobes(void) +static void do_free_cleaned_kprobes(void) { struct optimized_kprobe *op, *tmp; @@ -532,13 +521,13 @@ static __kprobes void do_free_cleaned_kprobes(void) } /* Start optimizer after OPTIMIZE_DELAY passed */ -static __kprobes void kick_kprobe_optimizer(void) +static void kick_kprobe_optimizer(void) { schedule_delayed_work(&optimizing_work, OPTIMIZE_DELAY); } /* Kprobe jump optimizer */ -static __kprobes void kprobe_optimizer(struct work_struct *work) +static void kprobe_optimizer(struct work_struct *work) { mutex_lock(&kprobe_mutex); /* Lock modules while optimizing kprobes */ @@ -574,7 +563,7 @@ static __kprobes void kprobe_optimizer(struct work_struct *work) } /* Wait for completing optimization and unoptimization */ -static __kprobes void wait_for_kprobe_optimizer(void) +static void wait_for_kprobe_optimizer(void) { mutex_lock(&kprobe_mutex); @@ -593,7 +582,7 @@ static __kprobes void wait_for_kprobe_optimizer(void) } /* Optimize kprobe if p is ready to be optimized */ -static __kprobes void optimize_kprobe(struct kprobe *p) +static void optimize_kprobe(struct kprobe *p) { struct optimized_kprobe *op; @@ -627,7 +616,7 @@ static __kprobes void optimize_kprobe(struct kprobe *p) } /* Short cut to direct unoptimizing */ -static __kprobes void force_unoptimize_kprobe(struct optimized_kprobe *op) +static void force_unoptimize_kprobe(struct optimized_kprobe *op) { get_online_cpus(); arch_unoptimize_kprobe(op); @@ -637,7 +626,7 @@ static __kprobes void force_unoptimize_kprobe(struct optimized_kprobe *op) } /* Unoptimize a kprobe if p is optimized */ -static __kprobes void unoptimize_kprobe(struct kprobe *p, bool force) +static void unoptimize_kprobe(struct kprobe *p, bool force) { struct optimized_kprobe *op; @@ -697,7 +686,7 @@ static void reuse_unused_kprobe(struct kprobe *ap) } /* Remove optimized instructions */ -static void __kprobes kill_optimized_kprobe(struct kprobe *p) +static void kill_optimized_kprobe(struct kprobe *p) { struct optimized_kprobe *op; @@ -723,7 +712,7 @@ static void __kprobes kill_optimized_kprobe(struct kprobe *p) } /* Try to prepare optimized instructions */ -static __kprobes void prepare_optimized_kprobe(struct kprobe *p) +static void prepare_optimized_kprobe(struct kprobe *p) { struct optimized_kprobe *op; @@ -732,7 +721,7 @@ static __kprobes void prepare_optimized_kprobe(struct kprobe *p) } /* Allocate new optimized_kprobe and try to prepare optimized instructions */ -static __kprobes struct kprobe *alloc_aggr_kprobe(struct kprobe *p) +static struct kprobe *alloc_aggr_kprobe(struct kprobe *p) { struct optimized_kprobe *op; @@ -747,13 +736,13 @@ static __kprobes struct kprobe *alloc_aggr_kprobe(struct kprobe *p) return &op->kp; } -static void __kprobes init_aggr_kprobe(struct kprobe *ap, struct kprobe *p); +static void init_aggr_kprobe(struct kprobe *ap, struct kprobe *p); /* * Prepare an optimized_kprobe and optimize it * NOTE: p must be a normal registered kprobe */ -static __kprobes void try_to_optimize_kprobe(struct kprobe *p) +static void try_to_optimize_kprobe(struct kprobe *p) { struct kprobe *ap; struct optimized_kprobe *op; @@ -787,7 +776,7 @@ out: } #ifdef CONFIG_SYSCTL -static void __kprobes optimize_all_kprobes(void) +static void optimize_all_kprobes(void) { struct hlist_head *head; struct kprobe *p; @@ -810,7 +799,7 @@ out: mutex_unlock(&kprobe_mutex); } -static void __kprobes unoptimize_all_kprobes(void) +static void unoptimize_all_kprobes(void) { struct hlist_head *head; struct kprobe *p; @@ -861,7 +850,7 @@ int proc_kprobes_optimization_handler(struct ctl_table *table, int write, #endif /* CONFIG_SYSCTL */ /* Put a breakpoint for a probe. Must be called with text_mutex locked */ -static void __kprobes __arm_kprobe(struct kprobe *p) +static void __arm_kprobe(struct kprobe *p) { struct kprobe *_p; @@ -876,7 +865,7 @@ static void __kprobes __arm_kprobe(struct kprobe *p) } /* Remove the breakpoint of a probe. Must be called with text_mutex locked */ -static void __kprobes __disarm_kprobe(struct kprobe *p, bool reopt) +static void __disarm_kprobe(struct kprobe *p, bool reopt) { struct kprobe *_p; @@ -911,13 +900,13 @@ static void reuse_unused_kprobe(struct kprobe *ap) BUG_ON(kprobe_unused(ap)); } -static __kprobes void free_aggr_kprobe(struct kprobe *p) +static void free_aggr_kprobe(struct kprobe *p) { arch_remove_kprobe(p); kfree(p); } -static __kprobes struct kprobe *alloc_aggr_kprobe(struct kprobe *p) +static struct kprobe *alloc_aggr_kprobe(struct kprobe *p) { return kzalloc(sizeof(struct kprobe), GFP_KERNEL); } @@ -931,7 +920,7 @@ static struct ftrace_ops kprobe_ftrace_ops __read_mostly = { static int kprobe_ftrace_enabled; /* Must ensure p->addr is really on ftrace */ -static int __kprobes prepare_kprobe(struct kprobe *p) +static int prepare_kprobe(struct kprobe *p) { if (!kprobe_ftrace(p)) return arch_prepare_kprobe(p); @@ -940,7 +929,7 @@ static int __kprobes prepare_kprobe(struct kprobe *p) } /* Caller must lock kprobe_mutex */ -static void __kprobes arm_kprobe_ftrace(struct kprobe *p) +static void arm_kprobe_ftrace(struct kprobe *p) { int ret; @@ -955,7 +944,7 @@ static void __kprobes arm_kprobe_ftrace(struct kprobe *p) } /* Caller must lock kprobe_mutex */ -static void __kprobes disarm_kprobe_ftrace(struct kprobe *p) +static void disarm_kprobe_ftrace(struct kprobe *p) { int ret; @@ -975,7 +964,7 @@ static void __kprobes disarm_kprobe_ftrace(struct kprobe *p) #endif /* Arm a kprobe with text_mutex */ -static void __kprobes arm_kprobe(struct kprobe *kp) +static void arm_kprobe(struct kprobe *kp) { if (unlikely(kprobe_ftrace(kp))) { arm_kprobe_ftrace(kp); @@ -992,7 +981,7 @@ static void __kprobes arm_kprobe(struct kprobe *kp) } /* Disarm a kprobe with text_mutex */ -static void __kprobes disarm_kprobe(struct kprobe *kp, bool reopt) +static void disarm_kprobe(struct kprobe *kp, bool reopt) { if (unlikely(kprobe_ftrace(kp))) { disarm_kprobe_ftrace(kp); @@ -1008,7 +997,7 @@ static void __kprobes disarm_kprobe(struct kprobe *kp, bool reopt) * Aggregate handlers for multiple kprobes support - these handlers * take care of invoking the individual kprobe handlers on p->list */ -static int __kprobes aggr_pre_handler(struct kprobe *p, struct pt_regs *regs) +static int aggr_pre_handler(struct kprobe *p, struct pt_regs *regs) { struct kprobe *kp; @@ -1022,9 +1011,10 @@ static int __kprobes aggr_pre_handler(struct kprobe *p, struct pt_regs *regs) } return 0; } +NOKPROBE_SYMBOL(aggr_pre_handler); -static void __kprobes aggr_post_handler(struct kprobe *p, struct pt_regs *regs, - unsigned long flags) +static void aggr_post_handler(struct kprobe *p, struct pt_regs *regs, + unsigned long flags) { struct kprobe *kp; @@ -1036,9 +1026,10 @@ static void __kprobes aggr_post_handler(struct kprobe *p, struct pt_regs *regs, } } } +NOKPROBE_SYMBOL(aggr_post_handler); -static int __kprobes aggr_fault_handler(struct kprobe *p, struct pt_regs *regs, - int trapnr) +static int aggr_fault_handler(struct kprobe *p, struct pt_regs *regs, + int trapnr) { struct kprobe *cur = __this_cpu_read(kprobe_instance); @@ -1052,8 +1043,9 @@ static int __kprobes aggr_fault_handler(struct kprobe *p, struct pt_regs *regs, } return 0; } +NOKPROBE_SYMBOL(aggr_fault_handler); -static int __kprobes aggr_break_handler(struct kprobe *p, struct pt_regs *regs) +static int aggr_break_handler(struct kprobe *p, struct pt_regs *regs) { struct kprobe *cur = __this_cpu_read(kprobe_instance); int ret = 0; @@ -1065,9 +1057,10 @@ static int __kprobes aggr_break_handler(struct kprobe *p, struct pt_regs *regs) reset_kprobe_instance(); return ret; } +NOKPROBE_SYMBOL(aggr_break_handler); /* Walks the list and increments nmissed count for multiprobe case */ -void __kprobes kprobes_inc_nmissed_count(struct kprobe *p) +void kprobes_inc_nmissed_count(struct kprobe *p) { struct kprobe *kp; if (!kprobe_aggrprobe(p)) { @@ -1078,9 +1071,10 @@ void __kprobes kprobes_inc_nmissed_count(struct kprobe *p) } return; } +NOKPROBE_SYMBOL(kprobes_inc_nmissed_count); -void __kprobes recycle_rp_inst(struct kretprobe_instance *ri, - struct hlist_head *head) +void recycle_rp_inst(struct kretprobe_instance *ri, + struct hlist_head *head) { struct kretprobe *rp = ri->rp; @@ -1095,8 +1089,9 @@ void __kprobes recycle_rp_inst(struct kretprobe_instance *ri, /* Unregistering */ hlist_add_head(&ri->hlist, head); } +NOKPROBE_SYMBOL(recycle_rp_inst); -void __kprobes kretprobe_hash_lock(struct task_struct *tsk, +void kretprobe_hash_lock(struct task_struct *tsk, struct hlist_head **head, unsigned long *flags) __acquires(hlist_lock) { @@ -1107,17 +1102,19 @@ __acquires(hlist_lock) hlist_lock = kretprobe_table_lock_ptr(hash); raw_spin_lock_irqsave(hlist_lock, *flags); } +NOKPROBE_SYMBOL(kretprobe_hash_lock); -static void __kprobes kretprobe_table_lock(unsigned long hash, - unsigned long *flags) +static void kretprobe_table_lock(unsigned long hash, + unsigned long *flags) __acquires(hlist_lock) { raw_spinlock_t *hlist_lock = kretprobe_table_lock_ptr(hash); raw_spin_lock_irqsave(hlist_lock, *flags); } +NOKPROBE_SYMBOL(kretprobe_table_lock); -void __kprobes kretprobe_hash_unlock(struct task_struct *tsk, - unsigned long *flags) +void kretprobe_hash_unlock(struct task_struct *tsk, + unsigned long *flags) __releases(hlist_lock) { unsigned long hash = hash_ptr(tsk, KPROBE_HASH_BITS); @@ -1126,14 +1123,16 @@ __releases(hlist_lock) hlist_lock = kretprobe_table_lock_ptr(hash); raw_spin_unlock_irqrestore(hlist_lock, *flags); } +NOKPROBE_SYMBOL(kretprobe_hash_unlock); -static void __kprobes kretprobe_table_unlock(unsigned long hash, - unsigned long *flags) +static void kretprobe_table_unlock(unsigned long hash, + unsigned long *flags) __releases(hlist_lock) { raw_spinlock_t *hlist_lock = kretprobe_table_lock_ptr(hash); raw_spin_unlock_irqrestore(hlist_lock, *flags); } +NOKPROBE_SYMBOL(kretprobe_table_unlock); /* * This function is called from finish_task_switch when task tk becomes dead, @@ -1141,7 +1140,7 @@ __releases(hlist_lock) * with this task. These left over instances represent probed functions * that have been called but will never return. */ -void __kprobes kprobe_flush_task(struct task_struct *tk) +void kprobe_flush_task(struct task_struct *tk) { struct kretprobe_instance *ri; struct hlist_head *head, empty_rp; @@ -1166,6 +1165,7 @@ void __kprobes kprobe_flush_task(struct task_struct *tk) kfree(ri); } } +NOKPROBE_SYMBOL(kprobe_flush_task); static inline void free_rp_inst(struct kretprobe *rp) { @@ -1178,7 +1178,7 @@ static inline void free_rp_inst(struct kretprobe *rp) } } -static void __kprobes cleanup_rp_inst(struct kretprobe *rp) +static void cleanup_rp_inst(struct kretprobe *rp) { unsigned long flags, hash; struct kretprobe_instance *ri; @@ -1197,12 +1197,13 @@ static void __kprobes cleanup_rp_inst(struct kretprobe *rp) } free_rp_inst(rp); } +NOKPROBE_SYMBOL(cleanup_rp_inst); /* * Add the new probe to ap->list. Fail if this is the * second jprobe at the address - two jprobes can't coexist */ -static int __kprobes add_new_kprobe(struct kprobe *ap, struct kprobe *p) +static int add_new_kprobe(struct kprobe *ap, struct kprobe *p) { BUG_ON(kprobe_gone(ap) || kprobe_gone(p)); @@ -1226,7 +1227,7 @@ static int __kprobes add_new_kprobe(struct kprobe *ap, struct kprobe *p) * Fill in the required fields of the "manager kprobe". Replace the * earlier kprobe in the hlist with the manager kprobe */ -static void __kprobes init_aggr_kprobe(struct kprobe *ap, struct kprobe *p) +static void init_aggr_kprobe(struct kprobe *ap, struct kprobe *p) { /* Copy p's insn slot to ap */ copy_kprobe(p, ap); @@ -1252,8 +1253,7 @@ static void __kprobes init_aggr_kprobe(struct kprobe *ap, struct kprobe *p) * This is the second or subsequent kprobe at the address - handle * the intricacies */ -static int __kprobes register_aggr_kprobe(struct kprobe *orig_p, - struct kprobe *p) +static int register_aggr_kprobe(struct kprobe *orig_p, struct kprobe *p) { int ret = 0; struct kprobe *ap = orig_p; @@ -1324,25 +1324,29 @@ out: return ret; } -static int __kprobes in_kprobes_functions(unsigned long addr) +bool __weak arch_within_kprobe_blacklist(unsigned long addr) { - struct kprobe_blackpoint *kb; + /* The __kprobes marked functions and entry code must not be probed */ + return addr >= (unsigned long)__kprobes_text_start && + addr < (unsigned long)__kprobes_text_end; +} - if (addr >= (unsigned long)__kprobes_text_start && - addr < (unsigned long)__kprobes_text_end) - return -EINVAL; +static bool within_kprobe_blacklist(unsigned long addr) +{ + struct kprobe_blacklist_entry *ent; + + if (arch_within_kprobe_blacklist(addr)) + return true; /* * If there exists a kprobe_blacklist, verify and * fail any probe registration in the prohibited area */ - for (kb = kprobe_blacklist; kb->name != NULL; kb++) { - if (kb->start_addr) { - if (addr >= kb->start_addr && - addr < (kb->start_addr + kb->range)) - return -EINVAL; - } + list_for_each_entry(ent, &kprobe_blacklist, list) { + if (addr >= ent->start_addr && addr < ent->end_addr) + return true; } - return 0; + + return false; } /* @@ -1351,7 +1355,7 @@ static int __kprobes in_kprobes_functions(unsigned long addr) * This returns encoded errors if it fails to look up symbol or invalid * combination of parameters. */ -static kprobe_opcode_t __kprobes *kprobe_addr(struct kprobe *p) +static kprobe_opcode_t *kprobe_addr(struct kprobe *p) { kprobe_opcode_t *addr = p->addr; @@ -1374,7 +1378,7 @@ invalid: } /* Check passed kprobe is valid and return kprobe in kprobe_table. */ -static struct kprobe * __kprobes __get_valid_kprobe(struct kprobe *p) +static struct kprobe *__get_valid_kprobe(struct kprobe *p) { struct kprobe *ap, *list_p; @@ -1406,8 +1410,8 @@ static inline int check_kprobe_rereg(struct kprobe *p) return ret; } -static __kprobes int check_kprobe_address_safe(struct kprobe *p, - struct module **probed_mod) +static int check_kprobe_address_safe(struct kprobe *p, + struct module **probed_mod) { int ret = 0; unsigned long ftrace_addr; @@ -1433,7 +1437,7 @@ static __kprobes int check_kprobe_address_safe(struct kprobe *p, /* Ensure it is not in reserved area nor out of text */ if (!kernel_text_address((unsigned long) p->addr) || - in_kprobes_functions((unsigned long) p->addr) || + within_kprobe_blacklist((unsigned long) p->addr) || jump_label_text_reserved(p->addr, p->addr)) { ret = -EINVAL; goto out; @@ -1469,7 +1473,7 @@ out: return ret; } -int __kprobes register_kprobe(struct kprobe *p) +int register_kprobe(struct kprobe *p) { int ret; struct kprobe *old_p; @@ -1531,7 +1535,7 @@ out: EXPORT_SYMBOL_GPL(register_kprobe); /* Check if all probes on the aggrprobe are disabled */ -static int __kprobes aggr_kprobe_disabled(struct kprobe *ap) +static int aggr_kprobe_disabled(struct kprobe *ap) { struct kprobe *kp; @@ -1547,7 +1551,7 @@ static int __kprobes aggr_kprobe_disabled(struct kprobe *ap) } /* Disable one kprobe: Make sure called under kprobe_mutex is locked */ -static struct kprobe *__kprobes __disable_kprobe(struct kprobe *p) +static struct kprobe *__disable_kprobe(struct kprobe *p) { struct kprobe *orig_p; @@ -1574,7 +1578,7 @@ static struct kprobe *__kprobes __disable_kprobe(struct kprobe *p) /* * Unregister a kprobe without a scheduler synchronization. */ -static int __kprobes __unregister_kprobe_top(struct kprobe *p) +static int __unregister_kprobe_top(struct kprobe *p) { struct kprobe *ap, *list_p; @@ -1631,7 +1635,7 @@ disarmed: return 0; } -static void __kprobes __unregister_kprobe_bottom(struct kprobe *p) +static void __unregister_kprobe_bottom(struct kprobe *p) { struct kprobe *ap; @@ -1647,7 +1651,7 @@ static void __kprobes __unregister_kprobe_bottom(struct kprobe *p) /* Otherwise, do nothing. */ } -int __kprobes register_kprobes(struct kprobe **kps, int num) +int register_kprobes(struct kprobe **kps, int num) { int i, ret = 0; @@ -1665,13 +1669,13 @@ int __kprobes register_kprobes(struct kprobe **kps, int num) } EXPORT_SYMBOL_GPL(register_kprobes); -void __kprobes unregister_kprobe(struct kprobe *p) +void unregister_kprobe(struct kprobe *p) { unregister_kprobes(&p, 1); } EXPORT_SYMBOL_GPL(unregister_kprobe); -void __kprobes unregister_kprobes(struct kprobe **kps, int num) +void unregister_kprobes(struct kprobe **kps, int num) { int i; @@ -1700,7 +1704,7 @@ unsigned long __weak arch_deref_entry_point(void *entry) return (unsigned long)entry; } -int __kprobes register_jprobes(struct jprobe **jps, int num) +int register_jprobes(struct jprobe **jps, int num) { struct jprobe *jp; int ret = 0, i; @@ -1731,19 +1735,19 @@ int __kprobes register_jprobes(struct jprobe **jps, int num) } EXPORT_SYMBOL_GPL(register_jprobes); -int __kprobes register_jprobe(struct jprobe *jp) +int register_jprobe(struct jprobe *jp) { return register_jprobes(&jp, 1); } EXPORT_SYMBOL_GPL(register_jprobe); -void __kprobes unregister_jprobe(struct jprobe *jp) +void unregister_jprobe(struct jprobe *jp) { unregister_jprobes(&jp, 1); } EXPORT_SYMBOL_GPL(unregister_jprobe); -void __kprobes unregister_jprobes(struct jprobe **jps, int num) +void unregister_jprobes(struct jprobe **jps, int num) { int i; @@ -1768,8 +1772,7 @@ EXPORT_SYMBOL_GPL(unregister_jprobes); * This kprobe pre_handler is registered with every kretprobe. When probe * hits it will set up the return probe. */ -static int __kprobes pre_handler_kretprobe(struct kprobe *p, - struct pt_regs *regs) +static int pre_handler_kretprobe(struct kprobe *p, struct pt_regs *regs) { struct kretprobe *rp = container_of(p, struct kretprobe, kp); unsigned long hash, flags = 0; @@ -1807,8 +1810,9 @@ static int __kprobes pre_handler_kretprobe(struct kprobe *p, } return 0; } +NOKPROBE_SYMBOL(pre_handler_kretprobe); -int __kprobes register_kretprobe(struct kretprobe *rp) +int register_kretprobe(struct kretprobe *rp) { int ret = 0; struct kretprobe_instance *inst; @@ -1861,7 +1865,7 @@ int __kprobes register_kretprobe(struct kretprobe *rp) } EXPORT_SYMBOL_GPL(register_kretprobe); -int __kprobes register_kretprobes(struct kretprobe **rps, int num) +int register_kretprobes(struct kretprobe **rps, int num) { int ret = 0, i; @@ -1879,13 +1883,13 @@ int __kprobes register_kretprobes(struct kretprobe **rps, int num) } EXPORT_SYMBOL_GPL(register_kretprobes); -void __kprobes unregister_kretprobe(struct kretprobe *rp) +void unregister_kretprobe(struct kretprobe *rp) { unregister_kretprobes(&rp, 1); } EXPORT_SYMBOL_GPL(unregister_kretprobe); -void __kprobes unregister_kretprobes(struct kretprobe **rps, int num) +void unregister_kretprobes(struct kretprobe **rps, int num) { int i; @@ -1908,38 +1912,38 @@ void __kprobes unregister_kretprobes(struct kretprobe **rps, int num) EXPORT_SYMBOL_GPL(unregister_kretprobes); #else /* CONFIG_KRETPROBES */ -int __kprobes register_kretprobe(struct kretprobe *rp) +int register_kretprobe(struct kretprobe *rp) { return -ENOSYS; } EXPORT_SYMBOL_GPL(register_kretprobe); -int __kprobes register_kretprobes(struct kretprobe **rps, int num) +int register_kretprobes(struct kretprobe **rps, int num) { return -ENOSYS; } EXPORT_SYMBOL_GPL(register_kretprobes); -void __kprobes unregister_kretprobe(struct kretprobe *rp) +void unregister_kretprobe(struct kretprobe *rp) { } EXPORT_SYMBOL_GPL(unregister_kretprobe); -void __kprobes unregister_kretprobes(struct kretprobe **rps, int num) +void unregister_kretprobes(struct kretprobe **rps, int num) { } EXPORT_SYMBOL_GPL(unregister_kretprobes); -static int __kprobes pre_handler_kretprobe(struct kprobe *p, - struct pt_regs *regs) +static int pre_handler_kretprobe(struct kprobe *p, struct pt_regs *regs) { return 0; } +NOKPROBE_SYMBOL(pre_handler_kretprobe); #endif /* CONFIG_KRETPROBES */ /* Set the kprobe gone and remove its instruction buffer. */ -static void __kprobes kill_kprobe(struct kprobe *p) +static void kill_kprobe(struct kprobe *p) { struct kprobe *kp; @@ -1963,7 +1967,7 @@ static void __kprobes kill_kprobe(struct kprobe *p) } /* Disable one kprobe */ -int __kprobes disable_kprobe(struct kprobe *kp) +int disable_kprobe(struct kprobe *kp) { int ret = 0; @@ -1979,7 +1983,7 @@ int __kprobes disable_kprobe(struct kprobe *kp) EXPORT_SYMBOL_GPL(disable_kprobe); /* Enable one kprobe */ -int __kprobes enable_kprobe(struct kprobe *kp) +int enable_kprobe(struct kprobe *kp) { int ret = 0; struct kprobe *p; @@ -2012,16 +2016,49 @@ out: } EXPORT_SYMBOL_GPL(enable_kprobe); -void __kprobes dump_kprobe(struct kprobe *kp) +void dump_kprobe(struct kprobe *kp) { printk(KERN_WARNING "Dumping kprobe:\n"); printk(KERN_WARNING "Name: %s\nAddress: %p\nOffset: %x\n", kp->symbol_name, kp->addr, kp->offset); } +NOKPROBE_SYMBOL(dump_kprobe); + +/* + * Lookup and populate the kprobe_blacklist. + * + * Unlike the kretprobe blacklist, we'll need to determine + * the range of addresses that belong to the said functions, + * since a kprobe need not necessarily be at the beginning + * of a function. + */ +static int __init populate_kprobe_blacklist(unsigned long *start, + unsigned long *end) +{ + unsigned long *iter; + struct kprobe_blacklist_entry *ent; + unsigned long offset = 0, size = 0; + + for (iter = start; iter < end; iter++) { + if (!kallsyms_lookup_size_offset(*iter, &size, &offset)) { + pr_err("Failed to find blacklist %p\n", (void *)*iter); + continue; + } + + ent = kmalloc(sizeof(*ent), GFP_KERNEL); + if (!ent) + return -ENOMEM; + ent->start_addr = *iter; + ent->end_addr = *iter + size; + INIT_LIST_HEAD(&ent->list); + list_add_tail(&ent->list, &kprobe_blacklist); + } + return 0; +} /* Module notifier call back, checking kprobes on the module */ -static int __kprobes kprobes_module_callback(struct notifier_block *nb, - unsigned long val, void *data) +static int kprobes_module_callback(struct notifier_block *nb, + unsigned long val, void *data) { struct module *mod = data; struct hlist_head *head; @@ -2062,14 +2099,13 @@ static struct notifier_block kprobe_module_nb = { .priority = 0 }; +/* Markers of _kprobe_blacklist section */ +extern unsigned long __start_kprobe_blacklist[]; +extern unsigned long __stop_kprobe_blacklist[]; + static int __init init_kprobes(void) { int i, err = 0; - unsigned long offset = 0, size = 0; - char *modname, namebuf[KSYM_NAME_LEN]; - const char *symbol_name; - void *addr; - struct kprobe_blackpoint *kb; /* FIXME allocate the probe table, currently defined statically */ /* initialize all list heads */ @@ -2079,26 +2115,11 @@ static int __init init_kprobes(void) raw_spin_lock_init(&(kretprobe_table_locks[i].lock)); } - /* - * Lookup and populate the kprobe_blacklist. - * - * Unlike the kretprobe blacklist, we'll need to determine - * the range of addresses that belong to the said functions, - * since a kprobe need not necessarily be at the beginning - * of a function. - */ - for (kb = kprobe_blacklist; kb->name != NULL; kb++) { - kprobe_lookup_name(kb->name, addr); - if (!addr) - continue; - - kb->start_addr = (unsigned long)addr; - symbol_name = kallsyms_lookup(kb->start_addr, - &size, &offset, &modname, namebuf); - if (!symbol_name) - kb->range = 0; - else - kb->range = size; + err = populate_kprobe_blacklist(__start_kprobe_blacklist, + __stop_kprobe_blacklist); + if (err) { + pr_err("kprobes: failed to populate blacklist: %d\n", err); + pr_err("Please take care of using kprobes.\n"); } if (kretprobe_blacklist_size) { @@ -2138,7 +2159,7 @@ static int __init init_kprobes(void) } #ifdef CONFIG_DEBUG_FS -static void __kprobes report_probe(struct seq_file *pi, struct kprobe *p, +static void report_probe(struct seq_file *pi, struct kprobe *p, const char *sym, int offset, char *modname, struct kprobe *pp) { char *kprobe_type; @@ -2167,12 +2188,12 @@ static void __kprobes report_probe(struct seq_file *pi, struct kprobe *p, (kprobe_ftrace(pp) ? "[FTRACE]" : "")); } -static void __kprobes *kprobe_seq_start(struct seq_file *f, loff_t *pos) +static void *kprobe_seq_start(struct seq_file *f, loff_t *pos) { return (*pos < KPROBE_TABLE_SIZE) ? pos : NULL; } -static void __kprobes *kprobe_seq_next(struct seq_file *f, void *v, loff_t *pos) +static void *kprobe_seq_next(struct seq_file *f, void *v, loff_t *pos) { (*pos)++; if (*pos >= KPROBE_TABLE_SIZE) @@ -2180,12 +2201,12 @@ static void __kprobes *kprobe_seq_next(struct seq_file *f, void *v, loff_t *pos) return pos; } -static void __kprobes kprobe_seq_stop(struct seq_file *f, void *v) +static void kprobe_seq_stop(struct seq_file *f, void *v) { /* Nothing to do */ } -static int __kprobes show_kprobe_addr(struct seq_file *pi, void *v) +static int show_kprobe_addr(struct seq_file *pi, void *v) { struct hlist_head *head; struct kprobe *p, *kp; @@ -2216,7 +2237,7 @@ static const struct seq_operations kprobes_seq_ops = { .show = show_kprobe_addr }; -static int __kprobes kprobes_open(struct inode *inode, struct file *filp) +static int kprobes_open(struct inode *inode, struct file *filp) { return seq_open(filp, &kprobes_seq_ops); } @@ -2228,7 +2249,47 @@ static const struct file_operations debugfs_kprobes_operations = { .release = seq_release, }; -static void __kprobes arm_all_kprobes(void) +/* kprobes/blacklist -- shows which functions can not be probed */ +static void *kprobe_blacklist_seq_start(struct seq_file *m, loff_t *pos) +{ + return seq_list_start(&kprobe_blacklist, *pos); +} + +static void *kprobe_blacklist_seq_next(struct seq_file *m, void *v, loff_t *pos) +{ + return seq_list_next(v, &kprobe_blacklist, pos); +} + +static int kprobe_blacklist_seq_show(struct seq_file *m, void *v) +{ + struct kprobe_blacklist_entry *ent = + list_entry(v, struct kprobe_blacklist_entry, list); + + seq_printf(m, "0x%p-0x%p\t%ps\n", (void *)ent->start_addr, + (void *)ent->end_addr, (void *)ent->start_addr); + return 0; +} + +static const struct seq_operations kprobe_blacklist_seq_ops = { + .start = kprobe_blacklist_seq_start, + .next = kprobe_blacklist_seq_next, + .stop = kprobe_seq_stop, /* Reuse void function */ + .show = kprobe_blacklist_seq_show, +}; + +static int kprobe_blacklist_open(struct inode *inode, struct file *filp) +{ + return seq_open(filp, &kprobe_blacklist_seq_ops); +} + +static const struct file_operations debugfs_kprobe_blacklist_ops = { + .open = kprobe_blacklist_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +static void arm_all_kprobes(void) { struct hlist_head *head; struct kprobe *p; @@ -2256,7 +2317,7 @@ already_enabled: return; } -static void __kprobes disarm_all_kprobes(void) +static void disarm_all_kprobes(void) { struct hlist_head *head; struct kprobe *p; @@ -2340,7 +2401,7 @@ static const struct file_operations fops_kp = { .llseek = default_llseek, }; -static int __kprobes debugfs_kprobe_init(void) +static int __init debugfs_kprobe_init(void) { struct dentry *dir, *file; unsigned int value = 1; @@ -2351,19 +2412,24 @@ static int __kprobes debugfs_kprobe_init(void) file = debugfs_create_file("list", 0444, dir, NULL, &debugfs_kprobes_operations); - if (!file) { - debugfs_remove(dir); - return -ENOMEM; - } + if (!file) + goto error; file = debugfs_create_file("enabled", 0600, dir, &value, &fops_kp); - if (!file) { - debugfs_remove(dir); - return -ENOMEM; - } + if (!file) + goto error; + + file = debugfs_create_file("blacklist", 0444, dir, NULL, + &debugfs_kprobe_blacklist_ops); + if (!file) + goto error; return 0; + +error: + debugfs_remove(dir); + return -ENOMEM; } late_initcall(debugfs_kprobe_init); diff --git a/kernel/notifier.c b/kernel/notifier.c index db4c8b0..4803da6 100644 --- a/kernel/notifier.c +++ b/kernel/notifier.c @@ -71,9 +71,9 @@ static int notifier_chain_unregister(struct notifier_block **nl, * @returns: notifier_call_chain returns the value returned by the * last notifier function called. */ -static int __kprobes notifier_call_chain(struct notifier_block **nl, - unsigned long val, void *v, - int nr_to_call, int *nr_calls) +static int notifier_call_chain(struct notifier_block **nl, + unsigned long val, void *v, + int nr_to_call, int *nr_calls) { int ret = NOTIFY_DONE; struct notifier_block *nb, *next_nb; @@ -102,6 +102,7 @@ static int __kprobes notifier_call_chain(struct notifier_block **nl, } return ret; } +NOKPROBE_SYMBOL(notifier_call_chain); /* * Atomic notifier chain routines. Registration and unregistration @@ -172,9 +173,9 @@ EXPORT_SYMBOL_GPL(atomic_notifier_chain_unregister); * Otherwise the return value is the return value * of the last notifier function called. */ -int __kprobes __atomic_notifier_call_chain(struct atomic_notifier_head *nh, - unsigned long val, void *v, - int nr_to_call, int *nr_calls) +int __atomic_notifier_call_chain(struct atomic_notifier_head *nh, + unsigned long val, void *v, + int nr_to_call, int *nr_calls) { int ret; @@ -184,13 +185,15 @@ int __kprobes __atomic_notifier_call_chain(struct atomic_notifier_head *nh, return ret; } EXPORT_SYMBOL_GPL(__atomic_notifier_call_chain); +NOKPROBE_SYMBOL(__atomic_notifier_call_chain); -int __kprobes atomic_notifier_call_chain(struct atomic_notifier_head *nh, - unsigned long val, void *v) +int atomic_notifier_call_chain(struct atomic_notifier_head *nh, + unsigned long val, void *v) { return __atomic_notifier_call_chain(nh, val, v, -1, NULL); } EXPORT_SYMBOL_GPL(atomic_notifier_call_chain); +NOKPROBE_SYMBOL(atomic_notifier_call_chain); /* * Blocking notifier chain routines. All access to the chain is @@ -527,7 +530,7 @@ EXPORT_SYMBOL_GPL(srcu_init_notifier_head); static ATOMIC_NOTIFIER_HEAD(die_chain); -int notrace __kprobes notify_die(enum die_val val, const char *str, +int notrace notify_die(enum die_val val, const char *str, struct pt_regs *regs, long err, int trap, int sig) { struct die_args args = { @@ -540,6 +543,7 @@ int notrace __kprobes notify_die(enum die_val val, const char *str, }; return atomic_notifier_call_chain(&die_chain, val, &args); } +NOKPROBE_SYMBOL(notify_die); int register_die_notifier(struct notifier_block *nb) { diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 268a45e..00781cc 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2480,7 +2480,7 @@ notrace unsigned long get_parent_ip(unsigned long addr) #if defined(CONFIG_PREEMPT) && (defined(CONFIG_DEBUG_PREEMPT) || \ defined(CONFIG_PREEMPT_TRACER)) -void __kprobes preempt_count_add(int val) +void preempt_count_add(int val) { #ifdef CONFIG_DEBUG_PREEMPT /* @@ -2506,8 +2506,9 @@ void __kprobes preempt_count_add(int val) } } EXPORT_SYMBOL(preempt_count_add); +NOKPROBE_SYMBOL(preempt_count_add); -void __kprobes preempt_count_sub(int val) +void preempt_count_sub(int val) { #ifdef CONFIG_DEBUG_PREEMPT /* @@ -2528,6 +2529,7 @@ void __kprobes preempt_count_sub(int val) __preempt_count_sub(val); } EXPORT_SYMBOL(preempt_count_sub); +NOKPROBE_SYMBOL(preempt_count_sub); #endif @@ -2804,6 +2806,7 @@ asmlinkage void __sched notrace preempt_schedule(void) barrier(); } while (need_resched()); } +NOKPROBE_SYMBOL(preempt_schedule); EXPORT_SYMBOL(preempt_schedule); #endif /* CONFIG_PREEMPT */ diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c index c894614..5d12bb4 100644 --- a/kernel/trace/trace_event_perf.c +++ b/kernel/trace/trace_event_perf.c @@ -248,8 +248,8 @@ void perf_trace_del(struct perf_event *p_event, int flags) tp_event->class->reg(tp_event, TRACE_REG_PERF_DEL, p_event); } -__kprobes void *perf_trace_buf_prepare(int size, unsigned short type, - struct pt_regs *regs, int *rctxp) +void *perf_trace_buf_prepare(int size, unsigned short type, + struct pt_regs *regs, int *rctxp) { struct trace_entry *entry; unsigned long flags; @@ -281,6 +281,7 @@ __kprobes void *perf_trace_buf_prepare(int size, unsigned short type, return raw_data; } EXPORT_SYMBOL_GPL(perf_trace_buf_prepare); +NOKPROBE_SYMBOL(perf_trace_buf_prepare); #ifdef CONFIG_FUNCTION_TRACER static void diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index 903ae28..242e4ec 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -40,27 +40,27 @@ struct trace_kprobe { (sizeof(struct probe_arg) * (n))) -static __kprobes bool trace_kprobe_is_return(struct trace_kprobe *tk) +static nokprobe_inline bool trace_kprobe_is_return(struct trace_kprobe *tk) { return tk->rp.handler != NULL; } -static __kprobes const char *trace_kprobe_symbol(struct trace_kprobe *tk) +static nokprobe_inline const char *trace_kprobe_symbol(struct trace_kprobe *tk) { return tk->symbol ? tk->symbol : "unknown"; } -static __kprobes unsigned long trace_kprobe_offset(struct trace_kprobe *tk) +static nokprobe_inline unsigned long trace_kprobe_offset(struct trace_kprobe *tk) { return tk->rp.kp.offset; } -static __kprobes bool trace_kprobe_has_gone(struct trace_kprobe *tk) +static nokprobe_inline bool trace_kprobe_has_gone(struct trace_kprobe *tk) { return !!(kprobe_gone(&tk->rp.kp)); } -static __kprobes bool trace_kprobe_within_module(struct trace_kprobe *tk, +static nokprobe_inline bool trace_kprobe_within_module(struct trace_kprobe *tk, struct module *mod) { int len = strlen(mod->name); @@ -68,7 +68,7 @@ static __kprobes bool trace_kprobe_within_module(struct trace_kprobe *tk, return strncmp(mod->name, name, len) == 0 && name[len] == ':'; } -static __kprobes bool trace_kprobe_is_on_module(struct trace_kprobe *tk) +static nokprobe_inline bool trace_kprobe_is_on_module(struct trace_kprobe *tk) { return !!strchr(trace_kprobe_symbol(tk), ':'); } @@ -132,19 +132,21 @@ struct symbol_cache *alloc_symbol_cache(const char *sym, long offset) * Kprobes-specific fetch functions */ #define DEFINE_FETCH_stack(type) \ -static __kprobes void FETCH_FUNC_NAME(stack, type)(struct pt_regs *regs,\ +static void FETCH_FUNC_NAME(stack, type)(struct pt_regs *regs, \ void *offset, void *dest) \ { \ *(type *)dest = (type)regs_get_kernel_stack_nth(regs, \ (unsigned int)((unsigned long)offset)); \ -} +} \ +NOKPROBE_SYMBOL(FETCH_FUNC_NAME(stack, type)); + DEFINE_BASIC_FETCH_FUNCS(stack) /* No string on the stack entry */ #define fetch_stack_string NULL #define fetch_stack_string_size NULL #define DEFINE_FETCH_memory(type) \ -static __kprobes void FETCH_FUNC_NAME(memory, type)(struct pt_regs *regs,\ +static void FETCH_FUNC_NAME(memory, type)(struct pt_regs *regs, \ void *addr, void *dest) \ { \ type retval; \ @@ -152,14 +154,16 @@ static __kprobes void FETCH_FUNC_NAME(memory, type)(struct pt_regs *regs,\ *(type *)dest = 0; \ else \ *(type *)dest = retval; \ -} +} \ +NOKPROBE_SYMBOL(FETCH_FUNC_NAME(memory, type)); + DEFINE_BASIC_FETCH_FUNCS(memory) /* * Fetch a null-terminated string. Caller MUST set *(u32 *)dest with max * length and relative data location. */ -static __kprobes void FETCH_FUNC_NAME(memory, string)(struct pt_regs *regs, - void *addr, void *dest) +static void FETCH_FUNC_NAME(memory, string)(struct pt_regs *regs, + void *addr, void *dest) { long ret; int maxlen = get_rloc_len(*(u32 *)dest); @@ -193,10 +197,11 @@ static __kprobes void FETCH_FUNC_NAME(memory, string)(struct pt_regs *regs, get_rloc_offs(*(u32 *)dest)); } } +NOKPROBE_SYMBOL(FETCH_FUNC_NAME(memory, string)); /* Return the length of string -- including null terminal byte */ -static __kprobes void FETCH_FUNC_NAME(memory, string_size)(struct pt_regs *regs, - void *addr, void *dest) +static void FETCH_FUNC_NAME(memory, string_size)(struct pt_regs *regs, + void *addr, void *dest) { mm_segment_t old_fs; int ret, len = 0; @@ -219,17 +224,19 @@ static __kprobes void FETCH_FUNC_NAME(memory, string_size)(struct pt_regs *regs, else *(u32 *)dest = len; } +NOKPROBE_SYMBOL(FETCH_FUNC_NAME(memory, string_size)); #define DEFINE_FETCH_symbol(type) \ -__kprobes void FETCH_FUNC_NAME(symbol, type)(struct pt_regs *regs, \ - void *data, void *dest) \ +void FETCH_FUNC_NAME(symbol, type)(struct pt_regs *regs, void *data, void *dest)\ { \ struct symbol_cache *sc = data; \ if (sc->addr) \ fetch_memory_##type(regs, (void *)sc->addr, dest); \ else \ *(type *)dest = 0; \ -} +} \ +NOKPROBE_SYMBOL(FETCH_FUNC_NAME(symbol, type)); + DEFINE_BASIC_FETCH_FUNCS(symbol) DEFINE_FETCH_symbol(string) DEFINE_FETCH_symbol(string_size) @@ -907,7 +914,7 @@ static const struct file_operations kprobe_profile_ops = { }; /* Kprobe handler */ -static __kprobes void +static nokprobe_inline void __kprobe_trace_func(struct trace_kprobe *tk, struct pt_regs *regs, struct ftrace_event_file *ftrace_file) { @@ -943,7 +950,7 @@ __kprobe_trace_func(struct trace_kprobe *tk, struct pt_regs *regs, entry, irq_flags, pc, regs); } -static __kprobes void +static void kprobe_trace_func(struct trace_kprobe *tk, struct pt_regs *regs) { struct event_file_link *link; @@ -951,9 +958,10 @@ kprobe_trace_func(struct trace_kprobe *tk, struct pt_regs *regs) list_for_each_entry_rcu(link, &tk->tp.files, list) __kprobe_trace_func(tk, regs, link->file); } +NOKPROBE_SYMBOL(kprobe_trace_func); /* Kretprobe handler */ -static __kprobes void +static nokprobe_inline void __kretprobe_trace_func(struct trace_kprobe *tk, struct kretprobe_instance *ri, struct pt_regs *regs, struct ftrace_event_file *ftrace_file) @@ -991,7 +999,7 @@ __kretprobe_trace_func(struct trace_kprobe *tk, struct kretprobe_instance *ri, entry, irq_flags, pc, regs); } -static __kprobes void +static void kretprobe_trace_func(struct trace_kprobe *tk, struct kretprobe_instance *ri, struct pt_regs *regs) { @@ -1000,6 +1008,7 @@ kretprobe_trace_func(struct trace_kprobe *tk, struct kretprobe_instance *ri, list_for_each_entry_rcu(link, &tk->tp.files, list) __kretprobe_trace_func(tk, ri, regs, link->file); } +NOKPROBE_SYMBOL(kretprobe_trace_func); /* Event entry printers */ static enum print_line_t @@ -1131,7 +1140,7 @@ static int kretprobe_event_define_fields(struct ftrace_event_call *event_call) #ifdef CONFIG_PERF_EVENTS /* Kprobe profile handler */ -static __kprobes void +static void kprobe_perf_func(struct trace_kprobe *tk, struct pt_regs *regs) { struct ftrace_event_call *call = &tk->tp.call; @@ -1158,9 +1167,10 @@ kprobe_perf_func(struct trace_kprobe *tk, struct pt_regs *regs) store_trace_args(sizeof(*entry), &tk->tp, regs, (u8 *)&entry[1], dsize); perf_trace_buf_submit(entry, size, rctx, 0, 1, regs, head, NULL); } +NOKPROBE_SYMBOL(kprobe_perf_func); /* Kretprobe profile handler */ -static __kprobes void +static void kretprobe_perf_func(struct trace_kprobe *tk, struct kretprobe_instance *ri, struct pt_regs *regs) { @@ -1188,6 +1198,7 @@ kretprobe_perf_func(struct trace_kprobe *tk, struct kretprobe_instance *ri, store_trace_args(sizeof(*entry), &tk->tp, regs, (u8 *)&entry[1], dsize); perf_trace_buf_submit(entry, size, rctx, 0, 1, regs, head, NULL); } +NOKPROBE_SYMBOL(kretprobe_perf_func); #endif /* CONFIG_PERF_EVENTS */ /* @@ -1196,9 +1207,8 @@ kretprobe_perf_func(struct trace_kprobe *tk, struct kretprobe_instance *ri, * kprobe_trace_self_tests_init() does enable_trace_probe/disable_trace_probe * lockless, but we can't race with this __init function. */ -static __kprobes -int kprobe_register(struct ftrace_event_call *event, - enum trace_reg type, void *data) +static int kprobe_register(struct ftrace_event_call *event, + enum trace_reg type, void *data) { struct trace_kprobe *tk = (struct trace_kprobe *)event->data; struct ftrace_event_file *file = data; @@ -1224,8 +1234,7 @@ int kprobe_register(struct ftrace_event_call *event, return 0; } -static __kprobes -int kprobe_dispatcher(struct kprobe *kp, struct pt_regs *regs) +static int kprobe_dispatcher(struct kprobe *kp, struct pt_regs *regs) { struct trace_kprobe *tk = container_of(kp, struct trace_kprobe, rp.kp); @@ -1239,9 +1248,10 @@ int kprobe_dispatcher(struct kprobe *kp, struct pt_regs *regs) #endif return 0; /* We don't tweek kernel, so just return 0 */ } +NOKPROBE_SYMBOL(kprobe_dispatcher); -static __kprobes -int kretprobe_dispatcher(struct kretprobe_instance *ri, struct pt_regs *regs) +static int +kretprobe_dispatcher(struct kretprobe_instance *ri, struct pt_regs *regs) { struct trace_kprobe *tk = container_of(ri->rp, struct trace_kprobe, rp); @@ -1255,6 +1265,7 @@ int kretprobe_dispatcher(struct kretprobe_instance *ri, struct pt_regs *regs) #endif return 0; /* We don't tweek kernel, so just return 0 */ } +NOKPROBE_SYMBOL(kretprobe_dispatcher); static struct trace_event_functions kretprobe_funcs = { .trace = print_kretprobe_event diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index 8364a42..d4b9fc2 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -37,13 +37,13 @@ const char *reserved_field_names[] = { /* Printing in basic type function template */ #define DEFINE_BASIC_PRINT_TYPE_FUNC(type, fmt) \ -__kprobes int PRINT_TYPE_FUNC_NAME(type)(struct trace_seq *s, \ - const char *name, \ - void *data, void *ent) \ +int PRINT_TYPE_FUNC_NAME(type)(struct trace_seq *s, const char *name, \ + void *data, void *ent) \ { \ return trace_seq_printf(s, " %s=" fmt, name, *(type *)data); \ } \ -const char PRINT_TYPE_FMT_NAME(type)[] = fmt; +const char PRINT_TYPE_FMT_NAME(type)[] = fmt; \ +NOKPROBE_SYMBOL(PRINT_TYPE_FUNC_NAME(type)); DEFINE_BASIC_PRINT_TYPE_FUNC(u8 , "0x%x") DEFINE_BASIC_PRINT_TYPE_FUNC(u16, "0x%x") @@ -55,9 +55,8 @@ DEFINE_BASIC_PRINT_TYPE_FUNC(s32, "%d") DEFINE_BASIC_PRINT_TYPE_FUNC(s64, "%Ld") /* Print type function for string type */ -__kprobes int PRINT_TYPE_FUNC_NAME(string)(struct trace_seq *s, - const char *name, - void *data, void *ent) +int PRINT_TYPE_FUNC_NAME(string)(struct trace_seq *s, const char *name, + void *data, void *ent) { int len = *(u32 *)data >> 16; @@ -67,6 +66,7 @@ __kprobes int PRINT_TYPE_FUNC_NAME(string)(struct trace_seq *s, return trace_seq_printf(s, " %s=\"%s\"", name, (const char *)get_loc_data(data, ent)); } +NOKPROBE_SYMBOL(PRINT_TYPE_FUNC_NAME(string)); const char PRINT_TYPE_FMT_NAME(string)[] = "\\\"%s\\\""; @@ -81,23 +81,24 @@ const char PRINT_TYPE_FMT_NAME(string)[] = "\\\"%s\\\""; /* Data fetch function templates */ #define DEFINE_FETCH_reg(type) \ -__kprobes void FETCH_FUNC_NAME(reg, type)(struct pt_regs *regs, \ - void *offset, void *dest) \ +void FETCH_FUNC_NAME(reg, type)(struct pt_regs *regs, void *offset, void *dest) \ { \ *(type *)dest = (type)regs_get_register(regs, \ (unsigned int)((unsigned long)offset)); \ -} +} \ +NOKPROBE_SYMBOL(FETCH_FUNC_NAME(reg, type)); DEFINE_BASIC_FETCH_FUNCS(reg) /* No string on the register */ #define fetch_reg_string NULL #define fetch_reg_string_size NULL #define DEFINE_FETCH_retval(type) \ -__kprobes void FETCH_FUNC_NAME(retval, type)(struct pt_regs *regs, \ - void *dummy, void *dest) \ +void FETCH_FUNC_NAME(retval, type)(struct pt_regs *regs, \ + void *dummy, void *dest) \ { \ *(type *)dest = (type)regs_return_value(regs); \ -} +} \ +NOKPROBE_SYMBOL(FETCH_FUNC_NAME(retval, type)); DEFINE_BASIC_FETCH_FUNCS(retval) /* No string on the retval */ #define fetch_retval_string NULL @@ -112,8 +113,8 @@ struct deref_fetch_param { }; #define DEFINE_FETCH_deref(type) \ -__kprobes void FETCH_FUNC_NAME(deref, type)(struct pt_regs *regs, \ - void *data, void *dest) \ +void FETCH_FUNC_NAME(deref, type)(struct pt_regs *regs, \ + void *data, void *dest) \ { \ struct deref_fetch_param *dprm = data; \ unsigned long addr; \ @@ -123,12 +124,13 @@ __kprobes void FETCH_FUNC_NAME(deref, type)(struct pt_regs *regs, \ dprm->fetch(regs, (void *)addr, dest); \ } else \ *(type *)dest = 0; \ -} +} \ +NOKPROBE_SYMBOL(FETCH_FUNC_NAME(deref, type)); DEFINE_BASIC_FETCH_FUNCS(deref) DEFINE_FETCH_deref(string) -__kprobes void FETCH_FUNC_NAME(deref, string_size)(struct pt_regs *regs, - void *data, void *dest) +void FETCH_FUNC_NAME(deref, string_size)(struct pt_regs *regs, + void *data, void *dest) { struct deref_fetch_param *dprm = data; unsigned long addr; @@ -140,16 +142,18 @@ __kprobes void FETCH_FUNC_NAME(deref, string_size)(struct pt_regs *regs, } else *(string_size *)dest = 0; } +NOKPROBE_SYMBOL(FETCH_FUNC_NAME(deref, string_size)); -static __kprobes void update_deref_fetch_param(struct deref_fetch_param *data) +static void update_deref_fetch_param(struct deref_fetch_param *data) { if (CHECK_FETCH_FUNCS(deref, data->orig.fn)) update_deref_fetch_param(data->orig.data); else if (CHECK_FETCH_FUNCS(symbol, data->orig.fn)) update_symbol_cache(data->orig.data); } +NOKPROBE_SYMBOL(update_deref_fetch_param); -static __kprobes void free_deref_fetch_param(struct deref_fetch_param *data) +static void free_deref_fetch_param(struct deref_fetch_param *data) { if (CHECK_FETCH_FUNCS(deref, data->orig.fn)) free_deref_fetch_param(data->orig.data); @@ -157,6 +161,7 @@ static __kprobes void free_deref_fetch_param(struct deref_fetch_param *data) free_symbol_cache(data->orig.data); kfree(data); } +NOKPROBE_SYMBOL(free_deref_fetch_param); /* Bitfield fetch function */ struct bitfield_fetch_param { @@ -166,8 +171,8 @@ struct bitfield_fetch_param { }; #define DEFINE_FETCH_bitfield(type) \ -__kprobes void FETCH_FUNC_NAME(bitfield, type)(struct pt_regs *regs, \ - void *data, void *dest) \ +void FETCH_FUNC_NAME(bitfield, type)(struct pt_regs *regs, \ + void *data, void *dest) \ { \ struct bitfield_fetch_param *bprm = data; \ type buf = 0; \ @@ -177,13 +182,13 @@ __kprobes void FETCH_FUNC_NAME(bitfield, type)(struct pt_regs *regs, \ buf >>= bprm->low_shift; \ } \ *(type *)dest = buf; \ -} - +} \ +NOKPROBE_SYMBOL(FETCH_FUNC_NAME(bitfield, type)); DEFINE_BASIC_FETCH_FUNCS(bitfield) #define fetch_bitfield_string NULL #define fetch_bitfield_string_size NULL -static __kprobes void +static void update_bitfield_fetch_param(struct bitfield_fetch_param *data) { /* @@ -196,7 +201,7 @@ update_bitfield_fetch_param(struct bitfield_fetch_param *data) update_symbol_cache(data->orig.data); } -static __kprobes void +static void free_bitfield_fetch_param(struct bitfield_fetch_param *data) { /* @@ -255,17 +260,17 @@ fail: } /* Special function : only accept unsigned long */ -static __kprobes void fetch_kernel_stack_address(struct pt_regs *regs, - void *dummy, void *dest) +static void fetch_kernel_stack_address(struct pt_regs *regs, void *dummy, void *dest) { *(unsigned long *)dest = kernel_stack_pointer(regs); } +NOKPROBE_SYMBOL(fetch_kernel_stack_address); -static __kprobes void fetch_user_stack_address(struct pt_regs *regs, - void *dummy, void *dest) +static void fetch_user_stack_address(struct pt_regs *regs, void *dummy, void *dest) { *(unsigned long *)dest = user_stack_pointer(regs); } +NOKPROBE_SYMBOL(fetch_user_stack_address); static fetch_func_t get_fetch_size_function(const struct fetch_type *type, fetch_func_t orig_fn, diff --git a/kernel/trace/trace_probe.h b/kernel/trace/trace_probe.h index fb1ab5d..4f815fb 100644 --- a/kernel/trace/trace_probe.h +++ b/kernel/trace/trace_probe.h @@ -81,13 +81,13 @@ */ #define convert_rloc_to_loc(dl, offs) ((u32)(dl) + (offs)) -static inline void *get_rloc_data(u32 *dl) +static nokprobe_inline void *get_rloc_data(u32 *dl) { return (u8 *)dl + get_rloc_offs(*dl); } /* For data_loc conversion */ -static inline void *get_loc_data(u32 *dl, void *ent) +static nokprobe_inline void *get_loc_data(u32 *dl, void *ent) { return (u8 *)ent + get_rloc_offs(*dl); } @@ -136,9 +136,8 @@ typedef u32 string_size; /* Printing in basic type function template */ #define DECLARE_BASIC_PRINT_TYPE_FUNC(type) \ -__kprobes int PRINT_TYPE_FUNC_NAME(type)(struct trace_seq *s, \ - const char *name, \ - void *data, void *ent); \ +int PRINT_TYPE_FUNC_NAME(type)(struct trace_seq *s, const char *name, \ + void *data, void *ent); \ extern const char PRINT_TYPE_FMT_NAME(type)[] DECLARE_BASIC_PRINT_TYPE_FUNC(u8); @@ -303,7 +302,7 @@ static inline bool trace_probe_is_registered(struct trace_probe *tp) return !!(tp->flags & TP_FLAG_REGISTERED); } -static inline __kprobes void call_fetch(struct fetch_param *fprm, +static nokprobe_inline void call_fetch(struct fetch_param *fprm, struct pt_regs *regs, void *dest) { return fprm->fn(regs, fprm->data, dest); @@ -351,7 +350,7 @@ extern ssize_t traceprobe_probes_write(struct file *file, extern int traceprobe_command(const char *buf, int (*createfn)(int, char**)); /* Sum up total data length for dynamic arraies (strings) */ -static inline __kprobes int +static nokprobe_inline int __get_data_size(struct trace_probe *tp, struct pt_regs *regs) { int i, ret = 0; @@ -367,7 +366,7 @@ __get_data_size(struct trace_probe *tp, struct pt_regs *regs) } /* Store the value of each argument */ -static inline __kprobes void +static nokprobe_inline void store_trace_args(int ent_size, struct trace_probe *tp, struct pt_regs *regs, u8 *data, int maxlen) { diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 5a7f1a6..04fdb5d 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -108,8 +108,8 @@ static unsigned long get_user_stack_nth(struct pt_regs *regs, unsigned int n) * Uprobes-specific fetch functions */ #define DEFINE_FETCH_stack(type) \ -static __kprobes void FETCH_FUNC_NAME(stack, type)(struct pt_regs *regs,\ - void *offset, void *dest) \ +static void FETCH_FUNC_NAME(stack, type)(struct pt_regs *regs, \ + void *offset, void *dest) \ { \ *(type *)dest = (type)get_user_stack_nth(regs, \ ((unsigned long)offset)); \ @@ -120,8 +120,8 @@ DEFINE_BASIC_FETCH_FUNCS(stack) #define fetch_stack_string_size NULL #define DEFINE_FETCH_memory(type) \ -static __kprobes void FETCH_FUNC_NAME(memory, type)(struct pt_regs *regs,\ - void *addr, void *dest) \ +static void FETCH_FUNC_NAME(memory, type)(struct pt_regs *regs, \ + void *addr, void *dest) \ { \ type retval; \ void __user *vaddr = (void __force __user *) addr; \ @@ -136,8 +136,8 @@ DEFINE_BASIC_FETCH_FUNCS(memory) * Fetch a null-terminated string. Caller MUST set *(u32 *)dest with max * length and relative data location. */ -static __kprobes void FETCH_FUNC_NAME(memory, string)(struct pt_regs *regs, - void *addr, void *dest) +static void FETCH_FUNC_NAME(memory, string)(struct pt_regs *regs, + void *addr, void *dest) { long ret; u32 rloc = *(u32 *)dest; @@ -158,8 +158,8 @@ static __kprobes void FETCH_FUNC_NAME(memory, string)(struct pt_regs *regs, } } -static __kprobes void FETCH_FUNC_NAME(memory, string_size)(struct pt_regs *regs, - void *addr, void *dest) +static void FETCH_FUNC_NAME(memory, string_size)(struct pt_regs *regs, + void *addr, void *dest) { int len; void __user *vaddr = (void __force __user *) addr; @@ -184,8 +184,8 @@ static unsigned long translate_user_vaddr(void *file_offset) } #define DEFINE_FETCH_file_offset(type) \ -static __kprobes void FETCH_FUNC_NAME(file_offset, type)(struct pt_regs *regs,\ - void *offset, void *dest) \ +static void FETCH_FUNC_NAME(file_offset, type)(struct pt_regs *regs, \ + void *offset, void *dest)\ { \ void *vaddr = (void *)translate_user_vaddr(offset); \ \ |
