forked from luck/tmp_suning_uos_patched
f438d914b2
Introduce architecture dependent kretprobe blacklists to prohibit users from inserting return probes on the function in which kprobes can be inserted but kretprobes can not. This patch also removes "__kprobes" mark from "__switch_to" on x86_64 and registers "__switch_to" to the blacklist on x86-64, because that mark is to prohibit user from inserting only kretprobe. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
#ifndef _SPARC64_KPROBES_H
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#define _SPARC64_KPROBES_H
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#include <linux/types.h>
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#include <linux/percpu.h>
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typedef u32 kprobe_opcode_t;
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#define BREAKPOINT_INSTRUCTION 0x91d02070 /* ta 0x70 */
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#define BREAKPOINT_INSTRUCTION_2 0x91d02071 /* ta 0x71 */
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#define MAX_INSN_SIZE 2
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#define kretprobe_blacklist_size 0
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#define arch_remove_kprobe(p) do {} while (0)
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#define flush_insn_slot(p) \
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do { flushi(&(p)->ainsn.insn[0]); \
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flushi(&(p)->ainsn.insn[1]); \
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} while (0)
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/* Architecture specific copy of original instruction*/
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struct arch_specific_insn {
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/* copy of the original instruction */
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kprobe_opcode_t insn[MAX_INSN_SIZE];
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};
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struct prev_kprobe {
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struct kprobe *kp;
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unsigned long status;
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unsigned long orig_tnpc;
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unsigned long orig_tstate_pil;
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};
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/* per-cpu kprobe control block */
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struct kprobe_ctlblk {
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unsigned long kprobe_status;
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unsigned long kprobe_orig_tnpc;
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unsigned long kprobe_orig_tstate_pil;
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struct pt_regs jprobe_saved_regs;
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struct prev_kprobe prev_kprobe;
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};
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extern int kprobe_exceptions_notify(struct notifier_block *self,
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unsigned long val, void *data);
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extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
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#endif /* _SPARC64_KPROBES_H */
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