From d39f5450146ff39f66cfde9d5184420627d0ac51 Mon Sep 17 00:00:00 2001 From: Chris Smith Date: Fri, 5 Sep 2008 17:15:39 +0900 Subject: sh: Add kprobes support. Initial support for kprobes/kretprobes for 32-bit SH platforms. [ General cleanup and some rework for the kretprobe hash lock. -- PFM ] Signed-off-by: Chris Smith Signed-off-by: Paul Mundt --- arch/sh/include/asm/kprobes.h | 59 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 arch/sh/include/asm/kprobes.h (limited to 'arch/sh/include') diff --git a/arch/sh/include/asm/kprobes.h b/arch/sh/include/asm/kprobes.h new file mode 100644 index 00000000000..70fc629df90 --- /dev/null +++ b/arch/sh/include/asm/kprobes.h @@ -0,0 +1,59 @@ +#ifndef __ASM_SH_KPROBES_H +#define __ASM_SH_KPROBES_H + +#ifdef CONFIG_KPROBES + +#include +#include + +struct pt_regs; + +typedef u16 kprobe_opcode_t; +#define BREAKPOINT_INSTRUCTION 0xc3ff + +#define MAX_INSN_SIZE 16 +#define MAX_STACK_SIZE 64 +#define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \ + (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \ + ? (MAX_STACK_SIZE) \ + : (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) + +#define regs_return_value(regs) ((regs)->regs[0]) +#define flush_insn_slot(p) do { } while (0) +#define kretprobe_blacklist_size 0 + +struct kprobe; + +void arch_remove_kprobe(struct kprobe *); +void kretprobe_trampoline(void); +void jprobe_return_end(void); + +/* Architecture specific copy of original instruction*/ +struct arch_specific_insn { + /* copy of the original instruction */ + kprobe_opcode_t insn[MAX_INSN_SIZE]; +}; + +struct prev_kprobe { + struct kprobe *kp; + unsigned long status; +}; + +/* per-cpu kprobe control block */ +struct kprobe_ctlblk { + unsigned long kprobe_status; + unsigned long jprobe_saved_r15; + struct pt_regs jprobe_saved_regs; + kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE]; + struct prev_kprobe prev_kprobe; +}; + +extern int kprobe_exceptions_notify(struct notifier_block *self, + unsigned long val, void *data); +extern int kprobe_handle_illslot(unsigned long pc); +#else + +#define kprobe_handle_illslot(pc) (-1) + +#endif /* CONFIG_KPROBES */ +#endif /* __ASM_SH_KPROBES_H */ -- cgit v1.2.3