diff options
| -rw-r--r-- | arch/arm/kernel/entry-armv.S | 8 | ||||
| -rw-r--r-- | arch/arm/kernel/kprobes.c | 2 | ||||
| -rw-r--r-- | arch/arm/kernel/traps.c | 9 | ||||
| -rw-r--r-- | arch/arm/kernel/vmlinux.lds.S | 1 | ||||
| -rw-r--r-- | arch/arm/mm/fault.c | 4 | ||||
| -rw-r--r-- | include/asm-arm/traps.h | 9 |
6 files changed, 20 insertions, 13 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index 12ecc817be3..3727537f582 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -58,6 +58,12 @@ .endm +#ifdef CONFIG_KPROBES + .section .kprobes.text,"ax",%progbits +#else + .text +#endif + /* * Invalid mode handlers */ @@ -562,7 +568,7 @@ do_fpe: .data ENTRY(fp_enter) .word no_fp - .text + .previous no_fp: mov pc, lr diff --git a/arch/arm/kernel/kprobes.c b/arch/arm/kernel/kprobes.c index a18a8458e99..450ee2cbfe1 100644 --- a/arch/arm/kernel/kprobes.c +++ b/arch/arm/kernel/kprobes.c @@ -55,7 +55,7 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p) unsigned long addr = (unsigned long)p->addr; int is; - if (addr & 0x3) + if (addr & 0x3 || in_exception_text(addr)) return -EINVAL; insn = *p->addr; diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index c34db4e868f..65bb762b2d8 100644 --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -46,15 +46,6 @@ __setup("user_debug=", user_debug_setup); static void dump_mem(const char *str, unsigned long bottom, unsigned long top); -static inline int in_exception_text(unsigned long ptr) -{ - extern char __exception_text_start[]; - extern char __exception_text_end[]; - - return ptr >= (unsigned long)&__exception_text_start && - ptr < (unsigned long)&__exception_text_end; -} - void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long frame) { #ifdef CONFIG_KALLSYMS diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S index 5ff5406666b..30f732c7fdb 100644 --- a/arch/arm/kernel/vmlinux.lds.S +++ b/arch/arm/kernel/vmlinux.lds.S @@ -94,6 +94,7 @@ SECTIONS TEXT_TEXT SCHED_TEXT LOCK_TEXT + KPROBES_TEXT #ifdef CONFIG_MMU *(.fixup) #endif diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c index 1e7b1ed304d..28ad7ab1c0c 100644 --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -239,7 +239,7 @@ out: return fault; } -static int +static int __kprobes do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs) { struct task_struct *tsk; @@ -338,7 +338,7 @@ no_context: * interrupt or a critical region, and should only copy the information * from the master page table, nothing more. */ -static int +static int __kprobes do_translation_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs) { diff --git a/include/asm-arm/traps.h b/include/asm-arm/traps.h index d4f34dc83eb..f1541afcf85 100644 --- a/include/asm-arm/traps.h +++ b/include/asm-arm/traps.h @@ -15,4 +15,13 @@ struct undef_hook { void register_undef_hook(struct undef_hook *hook); void unregister_undef_hook(struct undef_hook *hook); +static inline int in_exception_text(unsigned long ptr) +{ + extern char __exception_text_start[]; + extern char __exception_text_end[]; + + return ptr >= (unsigned long)&__exception_text_start && + ptr < (unsigned long)&__exception_text_end; +} + #endif |