From 4d86dfbbda09b3c67bcaeb370f22a2cc7f39205b Mon Sep 17 00:00:00 2001 From: Vineet Gupta Date: Tue, 22 Jan 2013 17:03:59 +0530 Subject: ARC: kprobes support Origin port done by Rajeshwar Ranga Signed-off-by: Vineet Gupta Cc: Rajeshwar Ranga --- arch/arc/include/asm/kprobes.h | 62 ++++++++++++++++++++++++++++++++++++++++++ arch/arc/include/asm/ptrace.h | 5 ++++ 2 files changed, 67 insertions(+) create mode 100644 arch/arc/include/asm/kprobes.h (limited to 'arch/arc/include/asm') diff --git a/arch/arc/include/asm/kprobes.h b/arch/arc/include/asm/kprobes.h new file mode 100644 index 000000000000..4d9c211fce70 --- /dev/null +++ b/arch/arc/include/asm/kprobes.h @@ -0,0 +1,62 @@ +/* + * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef _ARC_KPROBES_H +#define _ARC_KPROBES_H + +#ifdef CONFIG_KPROBES + +typedef u16 kprobe_opcode_t; + +#define UNIMP_S_INSTRUCTION 0x79e0 +#define TRAP_S_2_INSTRUCTION 0x785e + +#define MAX_INSN_SIZE 8 +#define MAX_STACK_SIZE 64 + +struct arch_specific_insn { + int is_short; + kprobe_opcode_t *t1_addr, *t2_addr; + kprobe_opcode_t t1_opcode, t2_opcode; +}; + +#define flush_insn_slot(p) do { } while (0) + +#define kretprobe_blacklist_size 0 + +struct kprobe; + +void arch_remove_kprobe(struct kprobe *p); + +int kprobe_exceptions_notify(struct notifier_block *self, + unsigned long val, void *data); + +struct prev_kprobe { + struct kprobe *kp; + unsigned long status; +}; + +struct kprobe_ctlblk { + unsigned int kprobe_status; + struct pt_regs jprobe_saved_regs; + char jprobes_stack[MAX_STACK_SIZE]; + struct prev_kprobe prev_kprobe; +}; + +int kprobe_fault_handler(struct pt_regs *regs, unsigned long cause); +void kretprobe_trampoline(void); +void trap_is_kprobe(unsigned long cause, unsigned long address, + struct pt_regs *regs); +#else +static void trap_is_kprobe(unsigned long cause, unsigned long address, + struct pt_regs *regs) +{ +} +#endif + +#endif diff --git a/arch/arc/include/asm/ptrace.h b/arch/arc/include/asm/ptrace.h index a98957a95fb3..063ed0040ef7 100644 --- a/arch/arc/include/asm/ptrace.h +++ b/arch/arc/include/asm/ptrace.h @@ -111,6 +111,11 @@ struct callee_regs { (struct pt_regs *)(pg_start + THREAD_SIZE - 4) - 1; \ }) +static inline long regs_return_value(struct pt_regs *regs) +{ + return regs->r0; +} + #endif /* !__ASSEMBLY__ */ #define orig_r8_IS_SCALL 0x0001 -- cgit v1.2.1