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NEWS: Explain the s390 jmp_buf / ucontext_t ABI change reversal.

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Stefan Liebler 2014-08-01 09:48:17 +02:00 committed by Andreas Krebbel
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@ -1,3 +1,8 @@
2014-08-01 Stefan Liebler <stli@linux.vnet.ibm.com>
* NEWS: Explain the s390 jmp_buf / ucontext_t ABI change
reversal.
2014-07-31 Roland McGrath <roland@hack.frob.com>
* sysdeps/generic/safe-fatal.h: New file.

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NEWS
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@ -24,6 +24,17 @@ Version 2.20
17050, 17058, 17061, 17062, 17069, 17075, 17078, 17079, 17084, 17086,
17088, 17092, 17097, 17125, 17135, 17137, 17150, 17153, 17213.
* Reverted change of ABI data structures for s390 and s390x:
On s390 and s390x the size of struct ucontext and jmp_buf was increased in
2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
are preserved pointing straight to the same implementation as the old ones.
Given that, new callers wil simply provide a too-big buffer to these
functions. Any applications/libraries out there that embed jmp_buf or
ucontext_t in an ABI-relevant data structure that have already been rebuilt
against 2.19 headers will have to rebuilt again. This is necessary in any
case to revert the breakage in their ABI caused by the glibc change.
* Support for file description locks is added to systems running the
Linux kernel. The standard file locking interfaces are extended to
operate on file descriptions, not file descriptors, via the use of