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Make __tunables_init hidden and avoid PLT

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Since __tunables_init is internal to ld.so, we should mark it hidden
to avoid PLT.  We should also avoid PLT when calling __tunable_set_val
within ld.so.

2017-05-25   Siddhesh Poyarekar  <siddhesh@sourceware.org>
	     H.J. Lu  <hongjiu.lu@intel.com>

	* elf/dl-tunables.c (__tunable_set_val): Make a hidden alias.
	* elf/dl-tunables.h (__tunables_init): Mark it hidden in rtld.
	(__tunable_set_val): Likewise.
This commit is contained in:
H.J. Lu
2017-05-25 06:55:42 -07:00
parent ee8015b9ea
commit 81efada528
3 changed files with 12 additions and 0 deletions
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7
ChangeLog
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@@ -1,3 +1,10 @@
2017-05-25 Siddhesh Poyarekar <siddhesh@sourceware.org>
H.J. Lu <hongjiu.lu@intel.com>
* elf/dl-tunables.c (__tunable_set_val): Make a hidden alias.
* elf/dl-tunables.h (__tunables_init): Mark it hidden in rtld.
(__tunable_set_val): Likewise.
2017-05-25 H.J. Lu <hongjiu.lu@intel.com> 2017-05-25 H.J. Lu <hongjiu.lu@intel.com>
* Makeconfig ($(common-objpfx)dl-tunable-list.h): Also check * Makeconfig ($(common-objpfx)dl-tunable-list.h): Also check

2
elf/dl-tunables.c
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@@ -470,3 +470,5 @@ cb:
if (callback) if (callback)
callback (&cur->val); callback (&cur->val);
} }
rtld_hidden_def (__tunable_set_val)

3
elf/dl-tunables.h
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@@ -69,6 +69,9 @@ typedef struct _tunable tunable_t;
extern void __tunables_init (char **); extern void __tunables_init (char **);
extern void __tunable_set_val (tunable_id_t, void *, tunable_callback_t); extern void __tunable_set_val (tunable_id_t, void *, tunable_callback_t);
rtld_hidden_proto (__tunables_init)
rtld_hidden_proto (__tunable_set_val)
/* Check if the tunable has been set to a non-default value and if it is, copy /* Check if the tunable has been set to a non-default value and if it is, copy
it over into __VAL. */ it over into __VAL. */
# define TUNABLE_SET_VAL(__id,__val) \ # define TUNABLE_SET_VAL(__id,__val) \