Commit-ID: 4201311dae59781fb19c40adddda45bf3c562b63 Gitweb: https://git.kernel.org/tip/4201311dae59781fb19c40adddda45bf3c562b63 Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx> AuthorDate: Tue, 7 May 2019 23:25:46 +0200 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Tue, 25 Jun 2019 10:23:46 +0200 x86/stackframe, x86/kprobes: Fix frame pointer annotations The kprobe trampolines have a FRAME_POINTER annotation that makes no sense. It marks the frame in the middle of pt_regs, at the place of saving BP. Change it to mark the pt_regs frame as per the ENCODE_FRAME_POINTER from the respective entry_*.S. Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Reviewed-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> Acked-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- arch/x86/kernel/kprobes/common.h | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/arch/x86/kernel/kprobes/common.h b/arch/x86/kernel/kprobes/common.h index 2b949f4fd4d8..2e25f5f3fa1f 100644 --- a/arch/x86/kernel/kprobes/common.h +++ b/arch/x86/kernel/kprobes/common.h @@ -5,15 +5,10 @@ /* Kprobes and Optprobes common header */ #include <asm/asm.h> - -#ifdef CONFIG_FRAME_POINTER -# define SAVE_RBP_STRING " push %" _ASM_BP "\n" \ - " mov %" _ASM_SP ", %" _ASM_BP "\n" -#else -# define SAVE_RBP_STRING " push %" _ASM_BP "\n" -#endif +#include <asm/frame.h> #ifdef CONFIG_X86_64 + #define SAVE_REGS_STRING \ /* Skip cs, ip, orig_ax. */ \ " subq $24, %rsp\n" \ @@ -27,11 +22,13 @@ " pushq %r10\n" \ " pushq %r11\n" \ " pushq %rbx\n" \ - SAVE_RBP_STRING \ + " pushq %rbp\n" \ " pushq %r12\n" \ " pushq %r13\n" \ " pushq %r14\n" \ - " pushq %r15\n" + " pushq %r15\n" \ + ENCODE_FRAME_POINTER + #define RESTORE_REGS_STRING \ " popq %r15\n" \ " popq %r14\n" \ @@ -51,19 +48,22 @@ /* Skip orig_ax, ip, cs */ \ " addq $24, %rsp\n" #else + #define SAVE_REGS_STRING \ /* Skip cs, ip, orig_ax and gs. */ \ - " subl $16, %esp\n" \ + " subl $4*4, %esp\n" \ " pushl %fs\n" \ " pushl %es\n" \ " pushl %ds\n" \ " pushl %eax\n" \ - SAVE_RBP_STRING \ + " pushl %ebp\n" \ " pushl %edi\n" \ " pushl %esi\n" \ " pushl %edx\n" \ " pushl %ecx\n" \ - " pushl %ebx\n" + " pushl %ebx\n" \ + ENCODE_FRAME_POINTER + #define RESTORE_REGS_STRING \ " popl %ebx\n" \ " popl %ecx\n" \
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