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nptl: Move __pthread_unwind_next into libc

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It's necessary to stub out __libc_disable_asynccancel and
__libc_enable_asynccancel via rtld-stubbed-symbols because the new
direct references to the unwinder result in symbol conflicts when the
rtld exception handling from libc is linked in during the construction
of librtld.map.

unwind-forcedunwind.c is merged into unwind-resume.c.  libc now needs
the functions that were previously only used in libpthread.

The GLIBC_PRIVATE exports of __libc_longjmp and __libc_siglongjmp are
no longer needed, so switch them to hidden symbols.

The symbol __pthread_unwind_next has been moved using
scripts/move-symbol-to-libc.py.

Reviewed-by: Adhemerva Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer
2021-04-21 19:49:50 +02:00
parent 3fec7f18bf
commit 1d95b035c7
82 changed files with 126 additions and 189 deletions
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8
nptl/pthreadP.h
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@ -271,19 +271,21 @@ extern void __pthread_unwind (__pthread_unwind_buf_t *__buf)
weak_function
#endif
;
libc_hidden_proto (__pthread_unwind)
extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)
__cleanup_fct_attribute __attribute ((__noreturn__))
#ifndef SHARED
weak_function
#endif
;
/* NB: No hidden proto for __pthread_unwind_next: inside glibc, the
legacy unwinding mechanism is used. */
#if IS_IN (libpthread)
extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf)
__cleanup_fct_attribute;
extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf)
__cleanup_fct_attribute;
#if IS_IN (libpthread)
hidden_proto (__pthread_unwind)
hidden_proto (__pthread_unwind_next)
hidden_proto (__pthread_register_cancel)
hidden_proto (__pthread_unregister_cancel)
# ifdef SHARED