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-rw-r--r--arch/x86/kernel/kprobes.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/arch/x86/kernel/kprobes.c b/arch/x86/kernel/kprobes.c
index b1804e40235d..80bcb7635465 100644
--- a/arch/x86/kernel/kprobes.c
+++ b/arch/x86/kernel/kprobes.c
@@ -263,15 +263,16 @@ static int __kprobes is_IF_modifier(kprobe_opcode_t *insn)
263 return 0; 263 return 0;
264} 264}
265 265
266#ifdef CONFIG_X86_64
267/* 266/*
268 * Adjust the displacement if the instruction uses the %rip-relative 267 * Adjust the displacement if the instruction uses the %rip-relative
269 * addressing mode. 268 * addressing mode.
270 * If it does, Return the address of the 32-bit displacement word. 269 * If it does, Return the address of the 32-bit displacement word.
271 * If not, return null. 270 * If not, return null.
271 * Only applicable to 64-bit x86.
272 */ 272 */
273static void __kprobes fix_riprel(struct kprobe *p) 273static void __kprobes fix_riprel(struct kprobe *p)
274{ 274{
275#ifdef CONFIG_X86_64
275 u8 *insn = p->ainsn.insn; 276 u8 *insn = p->ainsn.insn;
276 s64 disp; 277 s64 disp;
277 int need_modrm; 278 int need_modrm;
@@ -335,15 +336,15 @@ static void __kprobes fix_riprel(struct kprobe *p)
335 *(s32 *)insn = (s32) disp; 336 *(s32 *)insn = (s32) disp;
336 } 337 }
337 } 338 }
338}
339#endif 339#endif
340}
340 341
341static void __kprobes arch_copy_kprobe(struct kprobe *p) 342static void __kprobes arch_copy_kprobe(struct kprobe *p)
342{ 343{
343 memcpy(p->ainsn.insn, p->addr, MAX_INSN_SIZE * sizeof(kprobe_opcode_t)); 344 memcpy(p->ainsn.insn, p->addr, MAX_INSN_SIZE * sizeof(kprobe_opcode_t));
344#ifdef CONFIG_X86_64 345
345 fix_riprel(p); 346 fix_riprel(p);
346#endif 347
347 if (can_boost(p->addr)) 348 if (can_boost(p->addr))
348 p->ainsn.boostable = 0; 349 p->ainsn.boostable = 0;
349 else 350 else