Re: [PATCH v26 26/30] ELF: Introduce arch_setup_elf_property()

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On Wed, May 19, 2021 at 03:14:58PM -0700, Yu, Yu-cheng wrote:
> > > +++ b/include/uapi/linux/elf.h
> > > @@ -455,4 +455,13 @@ typedef struct elf64_note {
> > >   /* Bits for GNU_PROPERTY_AARCH64_FEATURE_1_BTI */
> > >   #define GNU_PROPERTY_AARCH64_FEATURE_1_BTI	(1U << 0)
> > > +/* .note.gnu.property types for x86: */
> > > +#define GNU_PROPERTY_X86_FEATURE_1_AND		0xc0000002
> > 
> > Why not 0xc0000001? ARM64 is 0xc0000000...
> > 
> 
> I just looked at the ABI document.
> 
> ARM has GNU_PROPERTY_AARCH64_FEATURE_1_AND 0xc0000000
> 
> X86 has:
> 	GNU_PROPERTY_X86_ISA_1_USED	0xc0000000
> 	GNU_PROPERTY_X86_ISA_1_NEEDED	0xc0000001
> 	GNU_PROPERTY_X86_FEATURE_1_AND	0xc0000002

Please add all three, not just the last one.



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