From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- arch/mips/include/asm/kprobes.h | 97 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100644 arch/mips/include/asm/kprobes.h (limited to 'arch/mips/include/asm/kprobes.h') diff --git a/arch/mips/include/asm/kprobes.h b/arch/mips/include/asm/kprobes.h new file mode 100644 index 000000000..daba1f9a4 --- /dev/null +++ b/arch/mips/include/asm/kprobes.h @@ -0,0 +1,97 @@ +/* + * Kernel Probes (KProbes) + * include/asm-mips/kprobes.h + * + * Copyright 2006 Sony Corp. + * Copyright 2010 Cavium Networks + * + * 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 + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef _ASM_KPROBES_H +#define _ASM_KPROBES_H + +#include +#include + +#include +#include +#include + +#define __ARCH_WANT_KPROBES_INSN_SLOT + +struct kprobe; +struct pt_regs; + +typedef union mips_instruction kprobe_opcode_t; + +#define MAX_INSN_SIZE 2 + +#define flush_insn_slot(p) \ +do { \ + flush_icache_range((unsigned long)p->addr, \ + (unsigned long)p->addr + \ + (MAX_INSN_SIZE * sizeof(kprobe_opcode_t))); \ +} while (0) + + +#define kretprobe_blacklist_size 0 + +void arch_remove_kprobe(struct kprobe *p); + +/* Architecture specific copy of original instruction*/ +struct arch_specific_insn { + /* copy of the original instruction */ + kprobe_opcode_t *insn; +}; + +struct prev_kprobe { + struct kprobe *kp; + unsigned long status; + unsigned long old_SR; + unsigned long saved_SR; + unsigned long saved_epc; +}; + +#define MAX_JPROBES_STACK_SIZE 128 +#define MAX_JPROBES_STACK_ADDR \ + (((unsigned long)current_thread_info()) + THREAD_SIZE - 32 - sizeof(struct pt_regs)) + +#define MIN_JPROBES_STACK_SIZE(ADDR) \ + ((((ADDR) + MAX_JPROBES_STACK_SIZE) > MAX_JPROBES_STACK_ADDR) \ + ? MAX_JPROBES_STACK_ADDR - (ADDR) \ + : MAX_JPROBES_STACK_SIZE) + + +#define SKIP_DELAYSLOT 0x0001 + +/* per-cpu kprobe control block */ +struct kprobe_ctlblk { + unsigned long kprobe_status; + unsigned long kprobe_old_SR; + unsigned long kprobe_saved_SR; + unsigned long kprobe_saved_epc; + unsigned long jprobe_saved_sp; + struct pt_regs jprobe_saved_regs; + /* Per-thread fields, used while emulating branches */ + unsigned long flags; + unsigned long target_epc; + u8 jprobes_stack[MAX_JPROBES_STACK_SIZE]; + struct prev_kprobe prev_kprobe; +}; + +extern int kprobe_exceptions_notify(struct notifier_block *self, + unsigned long val, void *data); + +#endif /* _ASM_KPROBES_H */ -- cgit v1.2.3-54-g00ecf