mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 22:40:05 +00:00
754af0b1ca
2004-03-11 Jakub Jelinek <jakub@redhat.com> * sysdeps/s390/dl-tls.h: Only add __tls_get_offset assembly if IS_IN_rtld. (__TLS_GET_ADDR): Use __tls_get_offset, not __tls_get_addr.
78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
/* Thread-local storage handling in the ELF dynamic linker. s390 version.
|
|
Copyright (C) 2003, 2004 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
|
|
/* Type used for the representation of TLS information in the GOT. */
|
|
typedef struct
|
|
{
|
|
unsigned long int ti_module;
|
|
unsigned long int ti_offset;
|
|
} tls_index;
|
|
|
|
|
|
#ifdef SHARED
|
|
/* This is the prototype for the GNU version. */
|
|
extern void *__tls_get_addr (tls_index *ti) attribute_hidden;
|
|
extern unsigned long __tls_get_offset (unsigned long got_offset);
|
|
|
|
# ifdef IS_IN_rtld
|
|
/* The special thing about the s390 TLS ABI is that we do not have the
|
|
standard __tls_get_addr function but the __tls_get_offset function
|
|
which differs in two important aspects:
|
|
1) __tls_get_offset gets a got offset instead of a pointer to the
|
|
tls_index structure
|
|
2) __tls_get_offset returns the offset of the requested variable to
|
|
the thread descriptor instead of a pointer to the variable.
|
|
*/
|
|
# ifdef __s390x__
|
|
asm("\n\
|
|
.text\n\
|
|
.globl __tls_get_offset\n\
|
|
.type __tls_get_offset, @function\n\
|
|
.align 4\n\
|
|
__tls_get_offset:\n\
|
|
la %r2,0(%r2,%r12)\n\
|
|
jg __tls_get_addr\n\
|
|
");
|
|
# elif defined __s390__
|
|
asm("\n\
|
|
.text\n\
|
|
.globl __tls_get_offset\n\
|
|
.type __tls_get_offset, @function\n\
|
|
.align 4\n\
|
|
__tls_get_offset:\n\
|
|
basr %r3,0\n\
|
|
0: la %r2,0(%r2,%r12)\n\
|
|
l %r4,1f-0b(%r3)\n\
|
|
b 0(%r4,%r3)\n\
|
|
1: .long __tls_get_addr - 0b\n\
|
|
");
|
|
# endif
|
|
# endif
|
|
|
|
# define GET_ADDR_OFFSET \
|
|
(ti->ti_offset - (unsigned long) __builtin_thread_pointer ())
|
|
|
|
# define __TLS_GET_ADDR(__ti) \
|
|
({ extern char _GLOBAL_OFFSET_TABLE_[] attribute_hidden; \
|
|
(void *) __tls_get_offset ((char *) (__ti) - _GLOBAL_OFFSET_TABLE_) \
|
|
+ (unsigned long) __builtin_thread_pointer (); })
|
|
|
|
#endif
|