-#ifndef _ASM_KPROBES_H
-#define _ASM_KPROBES_H
+#ifndef _ASM_POWERPC_KPROBES_H
+#define _ASM_POWERPC_KPROBES_H
+#ifdef __KERNEL__
/*
* Kernel Probes (KProbes)
- * include/asm-ppc64/kprobes.h
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
*/
#include <linux/types.h>
#include <linux/ptrace.h>
+#include <linux/percpu.h>
+
+#define __ARCH_WANT_KPROBES_INSN_SLOT
struct pt_regs;
+struct kprobe;
typedef unsigned int kprobe_opcode_t;
#define BREAKPOINT_INSTRUCTION 0x7fe00008 /* trap */
#define IS_TDI(instr) (((instr) & 0xfc000000) == 0x08000000)
#define IS_TWI(instr) (((instr) & 0xfc000000) == 0x0c000000)
-#define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)((func_descr_t *)pentry)
+#ifdef CONFIG_PPC64
+/*
+ * 64bit powerpc uses function descriptors.
+ * Handle cases where:
+ * - User passes a <.symbol> or <module:.symbol>
+ * - User passes a <symbol> or <module:symbol>
+ * - User passes a non-existant symbol, kallsyms_lookup_name
+ * returns 0. Don't deref the NULL pointer in that case
+ */
+#define kprobe_lookup_name(name, addr) \
+{ \
+ addr = (kprobe_opcode_t *)kallsyms_lookup_name(name); \
+ if (addr) { \
+ char *colon; \
+ if ((colon = strchr(name, ':')) != NULL) { \
+ colon++; \
+ if (*colon != '\0' && *colon != '.') \
+ addr = *(kprobe_opcode_t **)addr; \
+ } else if (name[0] != '.') \
+ addr = *(kprobe_opcode_t **)addr; \
+ } else { \
+ char dot_name[KSYM_NAME_LEN]; \
+ dot_name[0] = '.'; \
+ dot_name[1] = '\0'; \
+ strncat(dot_name, name, KSYM_NAME_LEN - 2); \
+ addr = (kprobe_opcode_t *)kallsyms_lookup_name(dot_name); \
+ } \
+}
#define is_trap(instr) (IS_TW(instr) || IS_TD(instr) || \
IS_TWI(instr) || IS_TDI(instr))
+#else
+/* Use stock kprobe_lookup_name since ppc32 doesn't use function descriptors */
+#define is_trap(instr) (IS_TW(instr) || IS_TWI(instr))
+#endif
#define ARCH_SUPPORTS_KRETPROBES
+#define ARCH_INACTIVE_KPROBE_COUNT 1
+#define flush_insn_slot(p) do { } while (0)
+
void kretprobe_trampoline(void);
+extern void arch_remove_kprobe(struct kprobe *p);
/* Architecture specific copy of original instruction */
struct arch_specific_insn {
/* copy of original instruction */
kprobe_opcode_t *insn;
+ /*
+ * Set in kprobes code, initially to 0. If the instruction can be
+ * eumulated, this is set to 1, if not, to -1.
+ */
+ int boostable;
+};
+
+struct prev_kprobe {
+ struct kprobe *kp;
+ unsigned long status;
+ unsigned long saved_msr;
+};
+
+/* per-cpu kprobe control block */
+struct kprobe_ctlblk {
+ unsigned long kprobe_status;
+ unsigned long kprobe_saved_msr;
+ struct pt_regs jprobe_saved_regs;
+ struct prev_kprobe prev_kprobe;
};
-#ifdef CONFIG_KPROBES
extern int kprobe_exceptions_notify(struct notifier_block *self,
- unsigned long val, void *data);
-#else /* !CONFIG_KPROBES */
-static inline int kprobe_exceptions_notify(struct notifier_block *self,
- unsigned long val, void *data)
-{
- return 0;
-}
-#endif
-#endif /* _ASM_KPROBES_H */
+ unsigned long val, void *data);
+extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
+#endif /* __KERNEL__ */
+#endif /* _ASM_POWERPC_KPROBES_H */