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Re: Reserving a section type range for LLVM
On Wed, Jun 14, 2017 at 11:12 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
> On Wed, Jun 14, 2017 at 11:03 AM, Peter Collingbourne via gnu-gabi
> <gnu-gabi@sourceware.org> wrote:
>> Any objections to this?
>>
>> Peter
>>
>> On Wed, Jun 7, 2017 at 8:29 PM, Peter Collingbourne <pcc@google.com> wrote:
>>> Hi,
>>>
>>> I am working on a feature in LLVM which will require a special section
>>> type for passing information between the compiler and the linker.
>>>
>>> I see [1] that binutils has defined section types in the range
>>> 0x6fff4700..0x6fff47ff, where presumably the 0x47 ('G') stands for
>>> GNU. In a similar fashion I would like to have the range
>>> 0x6fff4c00..0x6fff4cff reserved for LLVM.
>>>
>>> Thanks,
>>> Peter
>>>
>>> [1] https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob;f=elfcpp/elfcpp.h;h=cce40d41dedb281c2d8f41135250c2cc39162469;hb=HEAD#l369
>
> There are:
>
> #define SHT_GNU_INCREMENTAL_INPUTS 0x6fff4700 /* incremental build data */
> #define SHT_GNU_ATTRIBUTES 0x6ffffff5 /* Object attributes */
> #define SHT_GNU_HASH 0x6ffffff6 /* GNU style symbol hash table */
> #define SHT_GNU_LIBLIST 0x6ffffff7 /* List of prelink dependencies */
>
> 0x6fff4700 to 0x6fffffff may be used for GNU section types. We can carve
> out 0x6fff4c00..0x6fff4cff for LLVM.
Thanks, sounds good.
Where would be the best place to document this? Should I send a pull
request to https://github.com/hjl-tools/linux-abi ?
Peter