glibc.git/misc/sys, branch zack/remove-libcrypt

misc/sys/cdefs.h: Create FORTIFY redirects for internal calls

2023-07-05T14:59:48+00:00

The __REDIRECT* macros are creating aliases which may lead to unwanted
PLT entries when fortification is enabled.
To prevent these entries, the REDIRECT alias should be set to point to the
existing __GI_* aliases.
This is done transparently by creating a __REDIRECT_FORTIFY* version of
these macros, that can be overwritten internally when necessary.

Reviewed-by: Siddhesh Poyarekar

Added Redirects to longdouble error functions [BZ #29033]

2023-05-10T18:59:48+00:00

This patch redirects the error functions to the appropriate
longdouble variants which enables the compiler to optimize
for the abi ieeelongdouble.

Signed-off-by: Sachin Monga

cdefs.h: Define __COLD

2023-04-29T15:01:52+00:00

This expands to __attribute__ ((cold)) when supported. It should be
used to mark up functions that are invoked rarely.

Signed-off-by: Sergey Bugaev

cdefs.h: fix "__clang_major" typo

2023-02-27T11:18:24+00:00

* misc/sys/cdefs.h: Fix misspelling of "__clang_major__".
Reviewed-by: Adhemerval Zanella

cdefs: Limit definition of fortification macros

2023-02-02T12:49:02+00:00

Define the __glibc_fortify and other macros only when __FORTIFY_LEVEL >
0.  This has the effect of not defining these macros on older C90
compilers that do not have support for variable length argument lists.

Also trim off the trailing backslashes from the definition of
__glibc_fortify and __glibc_fortify_n macros.

Signed-off-by: Siddhesh Poyarekar 
Reviewed-by: Florian Weimer

Update copyright dates with scripts/update-copyrights

2023-01-06T21:14:39+00:00

Apply asm redirections in syslog.h before first use [BZ #27087]

2022-11-29T18:07:22+00:00

Similar to d0fa09a770, but for syslog.h when _FORTIFY_SOURCE > 0.
Fixes [BZ #27087] by applying long double-related asm redirections
before using functions in bits/syslog.h.

Tested with build-many-glibcs.py.

Reviewed-by: Adhemerval Zanella

linux: Add process_madvise

2022-06-02T18:43:28+00:00

It was added on Linux 5.10 (ecb8ac8b1f146915aa6b96449b66dd48984caacc)
with the same functionality as madvise but using a pidfd of the target
process.

Checked on x86_64-linux-gnu and i686-linux-gnu.

Reviewed-by: Carlos O'Donell

sys/cdefs.h: Do not require C++ compilers to define STDC

2022-05-16T15:48:51+00:00

The check for an ISO C compiler assumes that anything GCC-like will
define __STDC__, even if it's actually a C++ compiler. That's currently
true for G++ and compilers like clang++ that also define __GNUC__, but
it might not always be true.

The C++ standard leaves it implementation-defined whether or not
__STDC__ is defined by C++ compilers. And really the check should be
"ISO C or ISO C++ conforming compiler" anyway. So only give an error if
__GNUC__ is defined and neither __STDC__ nor __cplusplus is defined.

Reviewed-by: Fangrui Song

fortify: Ensure that __glibc_fortify condition is a constant [BZ #29141]

2022-05-16T14:40:08+00:00

The fix c8ee1c85 introduced a -1 check for object size without also
checking that object size is a constant.  Because of this, the tree
optimizer passes in gcc fail to fold away one of the branches in
__glibc_fortify and trips on a spurious Wstringop-overflow.  The warning
itself is incorrect and the branch does go away eventually in DCE in the
rtl passes in gcc, but the constant check is a helpful hint to simplify
code early, so add it in.

Resolves: BZ #29141
Signed-off-by: Siddhesh Poyarekar