Re: [RFC PATCH v4 09/29] bpf tools: Collect version and license from ELF sections

From: Alexei Starovoitov
Date: Thu May 28 2015 - 01:51:38 EST


On Thu, May 28, 2015 at 11:34:37AM +0800, Wangnan (F) wrote:
> >...
> >>+static int
> >>+bpf_object__init_kversion(struct bpf_object *obj,
> >>+ void *data, size_t size)
> >>+{
> >>+ u32 kver;
> >>+ if (size < sizeof(kver)) {
> >shouldn't it be '!=' ?
>
> Is it possible that LLVM pads 'version' section so the size of it becomes
> longer than sizeof(u32)?

llvm will not be padding a section unless user asks for it.
Try objdump on *_kern.o

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