[llvm-dev] RFC: Add GNU_PROPERTY_UINT32_AND_XXX/GNU_PROPERTY_UINT32_OR_XXX

H.J. Lu via llvm-dev
Thu, 21 Jan 2021 15:02:03 -0000

On Wed, Jan 13, 2021 at 9:06 AM H.J. Lu <hjl.tools at gmail.com>
wrote:
>
> 1. GNU_PROPERTY_UINT32_AND_LO..GNU_PROPERTY_UINT32_AND_HI
>
>  #define GNU_PROPERTY_UINT32_AND_LO 0xb0000000
>  #define GNU_PROPERTY_UINT32_AND_HI 0xb0007fff
>
> A bit in the output pr_data field is set only if it is set in all
> relocatable input pr_data fields.  If all bits in the the output
> pr_data field are zero, this property should be removed from output.
>
> If the bit is 1, all input relocatables have the feature.  If the
> bit is 0 or the property is missing, the info is unknown.
>
> 2. GNU_PROPERTY_UINT32_OR_LO..GNU_PROPERTY_UINT32_OR_HI
>
>  #define GNU_PROPERTY_UINT32_OR_LO 0xb0008000
>  #define GNU_PROPERTY_UINT32_OR_HI 0xb000ffff
>
> A bit in the output pr_data field is set if it is set in any
> relocatable input pr_data fields. If all bits in the the output
> pr_data field are zero, this property should be removed from output.
>
> If the bit is 1, some input relocatables have the feature.  If the
> bit is 0 or the property is missing, the info is unknown.
>
> The PDF is at
>
>
https://gitlab.com/x86-psABIs/Linux-ABI/-/wikis/uploads/0690db0a3b7e5d8a44e0271a4be54aa7/linux-gABI-and-or-2021-01-13.pdf
>
> --
> H.J.

Here is the binutils patch to implement it.

--
H.J.
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