[Bug libc/4018] segfault in ld.so on amd64

["Petr dot Salinger at seznam dot cz" <sourceware-bugzilla at sourceware dot org>]

------- Additional Comments From Petr dot Salinger at seznam dot cz  2007-02-12 09:56 -------
> Nonsense, that case must never happen. 

It happens on  _unsupported_ platform.
It could probably happen also on linux without __ASSUME_GETCWD_SYSCALL.
This way would be <posix/getcwd.c> used as fallback also on linux.

<posix/getcwd.c> uses  opendir()/readdir()/closedir(), they use
__libc_lock_* functions.  They are mapped to __pthread_mutex_* functions via

# define __libc_maybe_call(FUNC, ARGS, ELSE) \
  (__extension__ ({ __typeof (FUNC) *_fn = (FUNC); \
                    _fn != NULL ? (*_fn) ARGS : ELSE; }))


Output of  readelf -a elf/ld.so :

Relocation section '.rela.dyn'

00000011afa8  000b00000006 R_X86_64_GLOB_DAT 0000000000000000
__pthread_mutex_lock + 0
00000011afb8  000f00000006 R_X86_64_GLOB_DAT 0000000000000000
__pthread_mutex_init + 0
00000011afc8  001700000006 R_X86_64_GLOB_DAT 0000000000000000
__pthread_mutex_unlock + 0
00000011afd0  001b00000006 R_X86_64_GLOB_DAT 0000000000000000
__pthread_mutex_destro + 0

Relocation section '.rela.plt':

00000011b000  000b00000007 R_X86_64_JUMP_SLO 0000000000000000
__pthread_mutex_lock + 0
00000011b010  000f00000007 R_X86_64_JUMP_SLO 0000000000000000
__pthread_mutex_init + 0
00000011b028  001700000007 R_X86_64_JUMP_SLO 0000000000000000
__pthread_mutex_unlock + 0
00000011b030  001b00000007 R_X86_64_JUMP_SLO 0000000000000000
__pthread_mutex_destro + 0

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=4018

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