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s390/uprobes: architecture backend for uprobes

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Signed-off-by: Jan Willeke <willeke@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Jan Willeke
2014-09-22 16:39:06 +02:00
committed by Martin Schwidefsky
parent 975fab1739
commit 2a0a5b2299
10 changed files with 430 additions and 13 deletions
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42
arch/s390/include/asm/uprobes.h Normal file
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/*
* User-space Probes (UProbes) for s390
*
* Copyright IBM Corp. 2014
* Author(s): Jan Willeke,
*/
#ifndef _ASM_UPROBES_H
#define _ASM_UPROBES_H
#include <linux/notifier.h>
typedef u16 uprobe_opcode_t;
#define UPROBE_XOL_SLOT_BYTES 256 /* cache aligned */
#define UPROBE_SWBP_INSN 0x0002
#define UPROBE_SWBP_INSN_SIZE 2
struct arch_uprobe {
union{
uprobe_opcode_t insn[3];
uprobe_opcode_t ixol[3];
};
unsigned int saved_per : 1;
unsigned int saved_int_code;
};
struct arch_uprobe_task {
};
int arch_uprobe_analyze_insn(struct arch_uprobe *aup, struct mm_struct *mm,
unsigned long addr);
int arch_uprobe_pre_xol(struct arch_uprobe *aup, struct pt_regs *regs);
int arch_uprobe_post_xol(struct arch_uprobe *aup, struct pt_regs *regs);
bool arch_uprobe_xol_was_trapped(struct task_struct *tsk);
int arch_uprobe_exception_notify(struct notifier_block *self, unsigned long val,
void *data);
void arch_uprobe_abort_xol(struct arch_uprobe *ap, struct pt_regs *regs);
unsigned long arch_uretprobe_hijack_return_addr(unsigned long trampoline,
struct pt_regs *regs);
#endif /* _ASM_UPROBES_H */