2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 #ifndef __ASM_UPROBES_H
7 #define __ASM_UPROBES_H
9 #include <linux/notifier.h>
10 #include <linux/types.h>
12 #include <asm/break.h>
16 * We want this to be defined as union mips_instruction but that makes the
17 * generic code blow up.
19 typedef u32 uprobe_opcode_t;
22 * Classic MIPS (note this implementation doesn't consider microMIPS yet)
23 * instructions are always 4 bytes but in order to deal with branches and
24 * their delay slots, we treat instructions as having 8 bytes maximum.
26 #define MAX_UINSN_BYTES 8
27 #define UPROBE_XOL_SLOT_BYTES 128 /* Max. cache line size */
29 #define UPROBE_BRK_UPROBE 0x000d000d /* break 13 */
30 #define UPROBE_BRK_UPROBE_XOL 0x000e000d /* break 14 */
32 #define UPROBE_SWBP_INSN UPROBE_BRK_UPROBE
33 #define UPROBE_SWBP_INSN_SIZE 4
36 unsigned long resume_epc;
41 struct arch_uprobe_task {
42 unsigned long saved_trap_nr;
45 extern int arch_uprobe_analyze_insn(struct arch_uprobe *aup,
46 struct mm_struct *mm, unsigned long addr);
47 extern int arch_uprobe_pre_xol(struct arch_uprobe *aup, struct pt_regs *regs);
48 extern int arch_uprobe_post_xol(struct arch_uprobe *aup, struct pt_regs *regs);
49 extern bool arch_uprobe_xol_was_trapped(struct task_struct *tsk);
50 extern int arch_uprobe_exception_notify(struct notifier_block *self,
51 unsigned long val, void *data);
52 extern void arch_uprobe_abort_xol(struct arch_uprobe *aup,
53 struct pt_regs *regs);
54 extern unsigned long arch_uretprobe_hijack_return_addr(
55 unsigned long trampoline_vaddr, struct pt_regs *regs);
57 #endif /* __ASM_UPROBES_H */