Re: [Crash-utility] Problem in bt for ARM64

----- Original Message ----- > Ok. I have seen this change in the pt_regs struct before but did not connect > it to this problem. I see these new field in pt_regs in earlier kernel > versions than 4.7, but it is probably backports. It really does not matter > for the solution of the problem. The following change works for me: > Change: > #define USER_EFRAME_OFFSET (304) > to: > #define USER_EFRAME_OFFSET (STRUCT_SIZE("pt_regs") + 16) > > Then you might want to avoid the recalculation of the struct size. I think > your patch does the same thing. Yeah, but doing it your way makes better sense. In fact, I see that there's another commit coming down the pike in 4.14-rc1 that changes the size yet again: diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h index 11403fd..ee72aa9 100644 --- a/arch/arm64/include/asm/ptrace.h +++ b/arch/arm64/include/asm/ptrace.h @@ -119,6 +119,7 @@ struct pt_regs { u64 syscallno; u64 orig_addr_limit; u64 unused; // maintain 16 byte alignment + u64 stackframe[2]; };

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