[PATCH 0/3] s390: Generate .eh_frame unwind information for .plt section

[Jens Remus]

Thanks! Committed to mainline.

Regards,
Jens

On 27.01.2025 10:12, Andreas Krebbel wrote:
> Hi Jens,
> 
> Patches are ok. Thank you very much!
> 
> Andreas
> 
> 
> On 1/22/25 3:10 PM, Jens Remus wrote:
>> This enables the linker on s390x to generate .eh_frame unwind
>> information for the .plt section.  Based on x86-64.  This enables
>> e.g. perf to unwind through PLT entries.  Furthermore this lays the
>> foundation to generate SFrame stack trace information in the future.
>>
>> Patch 1 resolves an issue in the linker s390 emulation option parsing.
>> This is a prerequisite to add support for linker option
>> "--[no-]ld-generated-unwind-info" in patch 3.
>>
>> Patch 2 adds basic PLT generation tests that are extended in patch 3.
>>
>> Patch 3 adds support for linker option
>> "--[no-]ld-generated-unwind-info" and enables the linker to generate
>> .eh_frame for .plt by default.
>>
>> Regards,
>> Jens
>>
>> Jens Remus (3):
>>    s390: Fix linker s390 emulation option parsing
>>    s390: Add basic PLT generation tests
>>    s390: Generate .eh_frame unwind information for .plt section
>>
>>   bfd/elf64-s390.c                         | 126 ++++++++++++++++++++++-
>>   ld/NEWS                                  |   6 ++
>>   ld/emulparams/elf64_s390.sh              |   1 +
>>   ld/emultempl/s390.em                     |   6 +-
>>   ld/testsuite/ld-s390/plt_31-1.s          |  40 +++++++
>>   ld/testsuite/ld-s390/plt_31-1.wf         |  32 ++++++
>>   ld/testsuite/ld-s390/plt_31_non-pic-1.pd |  54 ++++++++++
>>   ld/testsuite/ld-s390/plt_31_pic-1.pd     |  57 ++++++++++
>>   ld/testsuite/ld-s390/plt_64-1.pd         |  38 +++++++
>>   ld/testsuite/ld-s390/plt_64-1.s          |  26 +++++
>>   ld/testsuite/ld-s390/plt_64-1.wf         |  33 ++++++
>>   ld/testsuite/ld-s390/plt_64-1_eh.wf      |  31 ++++++
>>   ld/testsuite/ld-s390/pltlib.s            |  16 +++
>>   ld/testsuite/ld-s390/s390.exp            |  28 ++++-
>>   14 files changed, 488 insertions(+), 6 deletions(-)
>>   create mode 100644 ld/testsuite/ld-s390/plt_31-1.s
>>   create mode 100644 ld/testsuite/ld-s390/plt_31-1.wf
>>   create mode 100644 ld/testsuite/ld-s390/plt_31_non-pic-1.pd
>>   create mode 100644 ld/testsuite/ld-s390/plt_31_pic-1.pd
>>   create mode 100644 ld/testsuite/ld-s390/plt_64-1.pd
>>   create mode 100644 ld/testsuite/ld-s390/plt_64-1.s
>>   create mode 100644 ld/testsuite/ld-s390/plt_64-1.wf
>>   create mode 100644 ld/testsuite/ld-s390/plt_64-1_eh.wf
>>   create mode 100644 ld/testsuite/ld-s390/pltlib.s
>>

-- 
Jens Remus
Linux on Z Development (D3303)
+49-7031-16-1128 Office
jremus@de.ibm.com

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