Re: [PATCH v7 22/27] binfmt_elf: Extract .note.gnu.property from an ELF file

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On Fri, 2019-06-07 at 09:58 +0200, Peter Zijlstra wrote:
> On Thu, Jun 06, 2019 at 01:06:41PM -0700, Yu-cheng Yu wrote:
> > An ELF file's .note.gnu.property indicates features the executable file
> > can support.  For example, the property GNU_PROPERTY_X86_FEATURE_1_AND
> > indicates the file supports GNU_PROPERTY_X86_FEATURE_1_IBT and/or
> > GNU_PROPERTY_X86_FEATURE_1_SHSTK.
> > 
> > With this patch, if an arch needs to setup features from ELF properties,
> > it needs CONFIG_ARCH_USE_GNU_PROPERTY to be set, and a specific
> > arch_setup_property().
> > 
> > For example, for X86_64:
> > 
> > int arch_setup_property(void *ehdr, void *phdr, struct file *f, bool inter)
> > {
> > 	int r;
> > 	uint32_t property;
> > 
> > 	r = get_gnu_property(ehdr, phdr, f, GNU_PROPERTY_X86_FEATURE_1_AND,
> > 			     &property);
> > 	...
> > }
> > 
> > Signed-off-by: H.J. Lu <hjl.tools@xxxxxxxxx>
> > Signed-off-by: Yu-cheng Yu <yu-cheng.yu@xxxxxxxxx>
> 
> Did HJ write this patch as suggested by that SoB chain? If so, you lost
> a From: line on top, if not, the SoB thing is invalid.

I will fix that.

Yu-cheng



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