[Bug dynamic-link/21082] loader did not check result when allocating tlsblocks

["ma.jiang at zte dot com.cn" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=21082

--- Comment #4 from ma.jiang at zte dot com.cn ---
(In reply to Florian Weimer from comment #3)
> We currently cannot use INTERNAL_SYSCALL in generic code, so this is more
> complicated than it looks.
Hi Florian,
  Sorry for the delay, we got spring festival last week.
  If we could not use INTERNAL_SYSCALL in libc-tls.c then I can finally
understand those comments in code now... But I still can not understand why
INTERNAL_SYSCALL can not be used here.
  INTERNAL_SYSCALL is just a macro in sysdep.h, and have been used in many
generic routines
(nptl/nptl-init.c,sysdeps/unix/sysv/linux/clock_nanosleep.c,...). Moreover, I
have tried to add a static __sbrk (which used  INTERNAL_SYSCALL) into
libc-tls.c. It seems all things are ok, no compiling errors or run-time errors.
  By the way, there is another piece of code in my patch.  It is about init_tls
 in elf/rtld.c. This piece should be applicable , I suppose.

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