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authorH.J. Lu <hjl.tools@gmail.com>2014-12-21 09:12:04 -0800
committerH.J. Lu <hjl.tools@gmail.com>2014-12-21 09:27:11 -0800
commit050f7298e1ecc39887c329037575ccd972071255 (patch)
tree3e4caaa9640efd7e9a7020943f932c426b29ba29 /sysdeps/generic
parent6df5547e9349f0e22cd4356c8ef517e97530ddd0 (diff)
downloadglibc-050f7298e1ecc39887c329037575ccd972071255.tar.gz
glibc-050f7298e1ecc39887c329037575ccd972071255.tar.xz
glibc-050f7298e1ecc39887c329037575ccd972071255.zip
Add hidden __tls_get_addr/___tls_get_addr alias
__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.
Diffstat (limited to 'sysdeps/generic')
-rw-r--r--sysdeps/generic/localplt.data7
1 files changed, 3 insertions, 4 deletions
diff --git a/sysdeps/generic/localplt.data b/sysdeps/generic/localplt.data
index d7d673454f..1a40cf9841 100644
--- a/sysdeps/generic/localplt.data
+++ b/sysdeps/generic/localplt.data
@@ -7,10 +7,9 @@ libc.so: malloc
 libc.so: memalign
 libc.so: realloc
 libm.so: matherr
-# The dynamic loader needs __tls_get_addr for TLS, and uses __libc_memalign
-# internally to allocate aligned TLS storage. The other malloc family of
-# functions are expected to allow user symbol interposition.
-ld.so: __tls_get_addr
+# The dynamic loader uses __libc_memalign internally to allocate aligned
+# TLS storage. The other malloc family of functions are expected to allow
+# user symbol interposition.
 ld.so: __libc_memalign
 ld.so: malloc
 ld.so: calloc