mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 13:00:06 +00:00
050f7298e1
__tls_get_addr/___tls_get_addr is always defined in ld.so. There is no need to call them via PLT inside ld.so. This patch adds the hidden __tls_get_addr/___tls_get_addr aliases and calls them directly from _dl_tlsdesc_dynamic. There is no need to set up the EBX register in i386 _dl_tlsdesc_dynamic when calling the hidden ___tls_get_addr. * elf/dl-tls.c (__tls_get_addr): Provide the hidden definition if not defined. * sysdeps/i386/dl-tls.h (___tls_get_addr): Provide the hidden definition. * sysdeps/i386/dl-tlsdesc.S (_dl_tlsdesc_dynamic): Call the hidden ___tls_get_addr. * sysdeps/x86_64/dl-tlsdesc.S (_dl_tlsdesc_dynamic): Call the hidden __tls_get_addr. * sysdeps/generic/localplt.data (__tls_get_addr): Removed. * sysdeps/unix/sysv/linux/i386/localplt.data (___tls_get_addr): Likewise.
65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
/* Thread-local storage handling in the ELF dynamic linker. i386 version.
|
|
Copyright (C) 2002-2014 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
|
|
/* Type used for the representation of TLS information in the GOT. */
|
|
typedef struct dl_tls_index
|
|
{
|
|
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__ ((__regparm__ (1)));
|
|
extern void *___tls_get_addr_internal (tls_index *ti)
|
|
__attribute__ ((__regparm__ (1))) attribute_hidden;
|
|
|
|
# if IS_IN (rtld)
|
|
/* The special thing about the x86 TLS ABI is that we have two
|
|
variants of the __tls_get_addr function with different calling
|
|
conventions. The GNU version, which we are mostly concerned here,
|
|
takes the parameter in a register. The name is changed by adding
|
|
an additional underscore at the beginning. The Sun version uses
|
|
the normal calling convention. */
|
|
void *
|
|
__tls_get_addr (tls_index *ti)
|
|
{
|
|
return ___tls_get_addr_internal (ti);
|
|
}
|
|
|
|
|
|
/* Prepare using the definition of __tls_get_addr in the generic
|
|
version of this file. */
|
|
# define __tls_get_addr __attribute__ ((__regparm__ (1))) ___tls_get_addr
|
|
strong_alias (___tls_get_addr, ___tls_get_addr_internal)
|
|
rtld_hidden_proto (___tls_get_addr)
|
|
rtld_hidden_def (___tls_get_addr)
|
|
#else
|
|
|
|
/* Users should get the better interface. */
|
|
# define __tls_get_addr ___tls_get_addr
|
|
|
|
# endif
|
|
#endif
|
|
|
|
/* Value used for dtv entries for which the allocation is delayed. */
|
|
#define TLS_DTV_UNALLOCATED ((void *) -1l)
|