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Hide internal printf functions [BZ #18822/21986]

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Hide internal printf functions to allow direct access within libc.so and
libc.a without using GOT nor PLT.

Since __guess_grouping has been changed to take 2 arguments by

commit a1d84548c8
Author: Ulrich Drepper <drepper@redhat.com>
Date:   Fri Feb 11 18:50:36 2000 +0000

the third argument passed to __guess_grouping is removed.

	[BZ #18822]
	[BZ #21986]
	* include/printf.h (__printf_fphex): Add attribute_hidden.
	(__guess_grouping): New prototype.
	* stdio-common/printf_fp.c (__guess_grouping): Removed.
	* stdio-common/reg-printf.c (__register_printf_specifier): Add
	libc_hidden_proto and libc_hidden_def.
	* stdlib/strfmon_l.c (__guess_grouping): Removed.
	(__vstrfmon_l): Remove the third argument passed to
	__guess_grouping.
This commit is contained in:
H.J. Lu
2017-08-22 07:47:34 -07:00
parent a16e8bc08e
commit 20962acbea
5 changed files with 21 additions and 11 deletions
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2
stdio-common/reg-printf.c
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@@ -32,6 +32,7 @@ __libc_lock_define_initialized (static, lock)
int __register_printf_specifier (int, printf_function,
printf_arginfo_size_function);
libc_hidden_proto (__register_printf_specifier)
int __register_printf_function (int, printf_function,
printf_arginfo_function);
@@ -72,6 +73,7 @@ __register_printf_specifier (int spec, printf_function converter,
return result;
}
libc_hidden_def (__register_printf_specifier)
weak_alias (__register_printf_specifier, register_printf_specifier)