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-rw-r--r--arch/x86/include/asm/kprobes.h125
1 files changed, 125 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kprobes.h b/arch/x86/include/asm/kprobes.h
new file mode 100644
index 0000000000..a2e9317aad
--- /dev/null
+++ b/arch/x86/include/asm/kprobes.h
@@ -0,0 +1,125 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef _ASM_X86_KPROBES_H
+#define _ASM_X86_KPROBES_H
+/*
+ * Kernel Probes (KProbes)
+ *
+ * Copyright (C) IBM Corporation, 2002, 2004
+ *
+ * See arch/x86/kernel/kprobes.c for x86 kprobes history.
+ */
+
+#include <asm-generic/kprobes.h>
+
+#ifdef CONFIG_KPROBES
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/percpu.h>
+#include <asm/text-patching.h>
+#include <asm/insn.h>
+
+#define __ARCH_WANT_KPROBES_INSN_SLOT
+
+struct pt_regs;
+struct kprobe;
+
+typedef u8 kprobe_opcode_t;
+
+#define MAX_STACK_SIZE 64
+#define CUR_STACK_SIZE(ADDR) \
+ (current_top_of_stack() - (unsigned long)(ADDR))
+#define MIN_STACK_SIZE(ADDR) \
+ (MAX_STACK_SIZE < CUR_STACK_SIZE(ADDR) ? \
+ MAX_STACK_SIZE : CUR_STACK_SIZE(ADDR))
+
+#define flush_insn_slot(p) do { } while (0)
+
+/* optinsn template addresses */
+extern __visible kprobe_opcode_t optprobe_template_entry[];
+extern __visible kprobe_opcode_t optprobe_template_clac[];
+extern __visible kprobe_opcode_t optprobe_template_val[];
+extern __visible kprobe_opcode_t optprobe_template_call[];
+extern __visible kprobe_opcode_t optprobe_template_end[];
+#define MAX_OPTIMIZED_LENGTH (MAX_INSN_SIZE + DISP32_SIZE)
+#define MAX_OPTINSN_SIZE \
+ (((unsigned long)optprobe_template_end - \
+ (unsigned long)optprobe_template_entry) + \
+ MAX_OPTIMIZED_LENGTH + JMP32_INSN_SIZE)
+
+extern const int kretprobe_blacklist_size;
+
+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;
+ /*
+ * boostable = 0: This instruction type is not boostable.
+ * boostable = 1: This instruction has been boosted: we have
+ * added a relative jump after the instruction copy in insn,
+ * so no single-step and fixup are needed (unless there's
+ * a post_handler).
+ */
+ unsigned boostable:1;
+ unsigned char size; /* The size of insn */
+ union {
+ unsigned char opcode;
+ struct {
+ unsigned char type;
+ } jcc;
+ struct {
+ unsigned char type;
+ unsigned char asize;
+ } loop;
+ struct {
+ unsigned char reg;
+ } indirect;
+ };
+ s32 rel32; /* relative offset must be s32, s16, or s8 */
+ void (*emulate_op)(struct kprobe *p, struct pt_regs *regs);
+ /* Number of bytes of text poked */
+ int tp_len;
+};
+
+struct arch_optimized_insn {
+ /* copy of the original instructions */
+ kprobe_opcode_t copied_insn[DISP32_SIZE];
+ /* detour code buffer */
+ kprobe_opcode_t *insn;
+ /* the size of instructions copied to detour code buffer */
+ size_t size;
+};
+
+/* Return true (!0) if optinsn is prepared for optimization. */
+static inline int arch_prepared_optinsn(struct arch_optimized_insn *optinsn)
+{
+ return optinsn->size;
+}
+
+struct prev_kprobe {
+ struct kprobe *kp;
+ unsigned long status;
+ unsigned long old_flags;
+ unsigned long saved_flags;
+};
+
+/* per-cpu kprobe control block */
+struct kprobe_ctlblk {
+ unsigned long kprobe_status;
+ unsigned long kprobe_old_flags;
+ unsigned long kprobe_saved_flags;
+ struct prev_kprobe prev_kprobe;
+};
+
+extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
+extern int kprobe_exceptions_notify(struct notifier_block *self,
+ unsigned long val, void *data);
+extern int kprobe_int3_handler(struct pt_regs *regs);
+
+#else
+
+static inline int kprobe_debug_handler(struct pt_regs *regs) { return 0; }
+
+#endif /* CONFIG_KPROBES */
+#endif /* _ASM_X86_KPROBES_H */