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Mark internal nss symbols with attribute_hidden [BZ #18822]

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Mark internal nss symbols with attribute_hidden to allow direct access
within libc.so and libc.a without using GOT nor PLT.

Tested on x86-64 with and without --disable-nscd.

	[BZ #18822]
	* grp/initgroups.c (__nss_group_database): Removed.
	(__nss_initgroups_database): Likewise.
	* nscd/gai.c (__nss_hosts_database): Likewise.
	* nss/XXX-lookup.c (DATABASE_NAME_SYMBOL): Likewise.
	* posix/tst-rfc3484-2.c (__nss_hosts_database): Likewise.
	* posix/tst-rfc3484-3.c (__nss_hosts_database): Likewise.
	* posix/tst-rfc3484.c (__nss_hosts_database): Likewise.
	* sysdeps/posix/getaddrinfo.c (__nss_hosts_database): Likewise.
	* nss/getXXent.c (INTERNAL (REENTRANT_GETNAME)): Add
	attribute_hidden.
	* nss/nsswitch.c (__nss_database_custom): Define only if
	USE_NSCD is defined.
	(__nss_configure_lookup): Use __nss_database_custom only if
	USE_NSCD is defined.
	* nss/nsswitch.h (__nss_database_custom): Declare only if
	USE_NSCD is defined.  Add attribute_hidden.
	(__nss_setent): Add attribute_hidden.
	(__nss_endent): Likewise.
	(__nss_getent_r): Likewise.
	(__nss_getent): Likewise.
	(DEFINE_DATABASE): Declare __nss_##arg##_database.
This commit is contained in:
H.J. Lu
2017-08-21 05:31:02 -07:00
parent 2585d7b839
commit 1dbbb1ec7a
11 changed files with 45 additions and 23 deletions
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2
grp/initgroups.c
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@ -36,8 +36,6 @@ typedef enum nss_status (*initgroups_dyn_function) (const char *, gid_t,
long int *, long int *,
gid_t **, long int, int *);
extern service_user *__nss_group_database attribute_hidden;
service_user *__nss_initgroups_database;
static bool use_initgroups_entry;