glibc/sysdeps/s390/dl-tls.h
Ulrich Drepper e6ebd2e4db Update.
2003-01-27  Martin Schwidefsky  <schwidefsky@de.ibm.com>

	* elf/elf.h: Add new s390 relocs.
	* elf/tls-macros.h: Add s390 versions.
	* sysdeps/s390/Versions [GLIBC_2.3] (ld): Export __tls_get_offset.
	* sysdeps/s390/dl-tls.h: New file.
	* sysdeps/s390/libc-tls.c: New file.
	* sysdeps/s390/s390-32/dl-machine.h (elf_machine_type_class): Add TLS
	relocs for class PLT.
	(elf_machine_rela): Handle TLS relocs.
	* sysdeps/s390/s390-64/dl-machine.h: Likewise.
	* sysdeps/s390/s390-32/elf/configure.in: Add TLS check.
	* sysdeps/s390/s390-64/elf/configure.in: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/clone.S: Add support for
	CLONE_CHILD_*TID flags.
	* sysdeps/unix/sysv/linux/s390/s390-64/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/mmap.S: Use branch with 32
	bit offset.
	* sysdeps/unix/sysv/linux/s390/s390-64/socket.S: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscall.S: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/sysdep.S (__syscall_error):
	Support USE___THREAD. Define RTLD_PRIVATE_ERRNO variant.
	* sysdeps/unix/sysv/linux/s390/s390-64/sysdep.S (__syscall_error):
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h:
	(SYSCALL_ERROR_LABEL): Move define next to SYSCALL_ERROR_HANDLER.
	(SYSCALL_ERROR_HANDLER): Add USE___THREAD and RTLD_PRIVATE_ERRNO
	variants.
	* sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h:
	(SYSCALL_ERROR_LABEL): Move define next to SYSCALL_ERROR_HANDLER. Use
	direct branch to syscall_error for !PIC and PIC && !_LIBC_REENTRANT.
	(SYSCALL_ERROR_HANDLER): Add USE___THREAD and RTLD_PRIVATE_ERRNO
	variants.
2003-01-28 10:42:28 +00:00

74 lines
2.3 KiB
C

/* Thread-local storage handling in the ELF dynamic linker. s390 version.
Copyright (C) 2003 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);
/* 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.
*/
#if defined __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
#define GET_ADDR_OFFSET \
(ti->ti_offset - (unsigned long) __builtin_thread_pointer ())
#define __TLS_GET_ADDR(__ti) \
(__tls_get_addr(__ti) + (unsigned long) __builtin_thread_pointer ())
#endif