mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-08 14:20:07 +00:00
64c7e34428
ARM _dl_tlsdesc_dynamic slow path has two issues:
* The ip/r12 is defined by AAPCS as a scratch register, and gcc is
used to save the stack pointer before on some function calls. So it
should also be saved/restored as well. It fixes the tst-gnu2-tls2.
* None of the possible VFP registers are saved/restored. ARM has the
additional complexity to have different VFP bank sizes (depending of
VFP support by the chip).
The tst-gnu2-tls2 test is extended to check for VFP registers, although
only for hardfp builds. Different than setcontext, _dl_tlsdesc_dynamic
does not have HWCAP_ARM_IWMMXT (I don't have a way to properly test
it and it is almost a decade since newer hardware was released).
With this patch there is no need to mark tst-gnu2-tls2 as XFAIL.
Checked on arm-linux-gnueabihf.
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
/* Test TLSDESC relocation.
|
|
Copyright (C) 2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <stdint.h>
|
|
|
|
struct tls
|
|
{
|
|
int64_t a, b, c, d;
|
|
};
|
|
|
|
extern struct tls *apply_tls (struct tls *);
|
|
|
|
/* An architecture can define them to verify that clobber caller-saved
|
|
registers aren't changed by the implicit TLSDESC call. */
|
|
#ifndef INIT_TLSDESC_CALL
|
|
# define INIT_TLSDESC_CALL()
|
|
#endif
|
|
|
|
#ifndef BEFORE_TLSDESC_CALL
|
|
# define BEFORE_TLSDESC_CALL()
|
|
#endif
|
|
|
|
#ifndef AFTER_TLSDESC_CALL
|
|
# define AFTER_TLSDESC_CALL()
|
|
#endif
|