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This is the only missing part in struct statvfs.
The LSB calls [f]statfs() deprecated, and its weird types are definitely
off-putting. However, its use is required to get f_type.
Instead, allocate one of the six spares to f_type,
copied directly from struct statfs.
This then becomes a small glibc extension to the standard interface
on Linux and the Hurd, instead of two different interfaces, one of which
is quite odd due to being an ABI type, and there no longer is any reason
to use statfs().
The underlying kernel type is a mess, but all architectures agree on u32
(or more) for the ABI, and all filesystem magicks are 32-bit integers.
We don't lose any generality by using u32, and by doing so we both make
the API consistent with the Hurd, and allow C++
switch(f_type) { case RAMFS_MAGIC: ...; }
Also fix tst-statvfs so that it actually fails;
as it stood, all it did was return 0 always.
Test statfs()' and statvfs()' f_types are the same.
Link: https://lore.kernel.org/linux-man/f54kudgblgk643u32tb6at4cd3kkzha6hslahv24szs4raroaz@ogivjbfdaqtb/t/#u
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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No further changes needed ([f]statvfs() just cast to struct statfs *
and call [f]statfs()).
Link: https://lore.kernel.org/linux-man/f54kudgblgk643u32tb6at4cd3kkzha6hslahv24szs4raroaz@ogivjbfdaqtb/t/#u
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
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When using jemalloc, malloc() needs to use TSD, while libpthread
initialization needs malloc(). Having ___pthread_self set early to some
static storage allows TSD to work early, thus allowing jemalloc and
libpthread to initialize together.
This incidentaly simplifies __pthread_enable/disable_asynccancel and
__pthread_self, now that ___pthread_self is always initialized.
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When using jemalloc, malloc() needs to use TSD, while libpthread
initialization needs malloc(). Supporting a static TSD area allows jemalloc
and libpthread to initialize together.
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Some legacy AMD CPUs and hypervisors have the _cpuid_ '0x8000_001D'
set to Zero, thus resulting in zeroed-out computed cache values.
This patch reintroduces the old way of cache computation as a
fail-safe option to handle these exceptions.
Fixed 'level4_cache_size' value through handle_amd().
Reviewed-by: Premachandra Mallappa <premachandra.mallappa@amd.com>
Tested-by: Florian Weimer <fweimer@redhat.com>
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We only need to give to gawk the headers that actually define error
numbers, so let's rather filter out the other included headers early.
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04bf7d2d8a79 ("chk: Add and fix hidden builtin definitions for *_chk")
added an #undef for longjmp and siglongjmp to compensate for the
definition in include/setjmp.h, but missed doing so for the powerpc
version too.
Fixes: 04bf7d2d8a79 ("chk: Add and fix hidden builtin definitions for
*_chk")
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This patch allows the static PIE startfile rcrt1.o to be built
without requiring libgcc_s.so from GCC, which depends on libc
in the first place.
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Otherwise on gnu-i686 there are unwanted PLT entries in libc.so when
fortification is enabled.
Tested for i686-gnu, x86_64-gnu, i686-linux-gnu and x86_64-linux-gnu
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When PATH_MAX is undefined, realpath cannot ever ENAMETOOLONG, so
this test is unsupported.
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As Posix and stdlib/test-canon.c expects it, and rather than letting
pathconf crash.
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Posix says that d_name is of unspecified size, and sizeof(d_name)
should not be used. It is indeed only 1-byte long in bits/dirent.h. We
can instead explictly provide the actual allocated size to
__strcpy_chk.
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This fixes a hurd/check-installed-headers-c failure with
-std=c89 #define _FORTIFY_SOURCE 1:
In file included from ../hurd/hurd.h:354,
from ../sysdeps/hurd/include/hurd.h:2,
from /tmp/cih_test_9IaUwa.c:10:
/home/bmg/install/compilers/i686-gnu/lib/gcc/i686-glibc-gnu/13.2.1/include/stdarg.h:54:34: error: "__STDC_VERSION__" is not defined, evaluates to 0 [-Werror=undef]
54 | #if !defined(__STRICT_ANSI__) || __STDC_VERSION__ + 0 >= 199900L \
| ^~~~~~~~~~~~~~~~
/home/bmg/install/compilers/i686-gnu/lib/gcc/i686-glibc-gnu/13.2.1/include/stdarg.h:55:8: error: "__cplusplus" is not defined, evaluates to 0 [-Werror=undef]
55 | || __cplusplus + 0 >= 201103L
| ^~~~~~~~~~~
cc1: all warnings being treated as errors
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
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Commit 91927b7c76 ("Rewrite iconv option parsing [BZ #19519]") changed the
iconv program to call __gconv_open directly instead of the iconv_open
wrapper, but the former does not set errno. Update the caller to
interpret the return codes like iconv_open does.
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The option is not activelly tested and has bitrotten, to fix it
would require a lot of work and multiple fixes. A better option
would to evaluate each option and enable the warning if it makes
sense.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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Linux 6.4 adds a new constant IP_PROTOCOL; add it to glibc's
bits/in.h.
Tested for x86_64.
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This patch updates the kernel version in the tests tst-mman-consts.py,
tst-mount-consts.py and tst-pidfd-consts.py to 6.4. (There are no new
constants covered by these tests in 6.4 that need any other header
changes.)
Tested with build-many-glibcs.py.
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This patch enables the option to influence hwcaps used by PowerPC.
The environment variable, GLIBC_TUNABLES=glibc.cpu.hwcaps=-xxx,yyy,-zzz....,
can be used to enable CPU/ARCH feature yyy, disable CPU/ARCH feature xxx
and zzz, where the feature name is case-sensitive and has to match the ones
mentioned in the file{sysdeps/powerpc/dl-procinfo.c}.
Note that the hwcap tunables only used in the IFUNC selection.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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Avoid potential stack overflow from unbounded alloca. Use the existing
scratch_buffer instead.
Add testcases to exercise the code as suggested by Adhemerval Zanella Netto.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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On GCC before 11, IPA can make the fortified realpath aware that the
buffer size is not large enough (8 bytes instead of PATH_MAX bytes).
Fix this by using a buffer that is large enough.
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Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
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Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
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Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
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Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
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Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
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Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
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Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
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Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
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Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
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Add support for Intel Advanced Performance Extensions:
https://www.intel.com/content/www/us/en/developer/articles/technical/advanced-performance-extensions-apx.html
to <sys/platform/x86.h>.
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Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
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When building with fortify enabled, GCC 6 issues an warning the fortify
wrapper might overflow the destination buffer. However, GCC does not
provide a specific flag to disable the warning (the failure is tied to
-Werror). So to avoid disable all errors, only enable the check for
GCC 7 or newer.
Checked on i686-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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On __convert_scm_timestamps GCC 6 issues an warning that tvts[0]/tvts[1]
maybe be used uninitialized, however it would be used if type is set to a
value different than 0 (done by either COMPAT_SO_TIMESTAMP_OLD or
COMPAT_SO_TIMESTAMPNS_OLD) which will fallthrough to 'common' label.
It does not show with gcc 7 or more recent versions.
Checked on i686-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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Similar to memcpy, mempcpy, and memmove there is no need for an
specific memset_chk-nonshared.S. It can be provided by
memset-ia32.S itself for static library.
Checked on i686-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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The i386 string routines provide multiple internal definitions
for memcpy, memmove, and mempcpy chk routines:
$ objdump -t libc.a | grep __memcpy_chk
00000000 g F .text 0000000e __memcpy_chk
00000000 g F .text 00000013 __memcpy_chk
$ objdump -t libc.a | grep __mempcpy_chk
00000000 g F .text 0000000e __mempcpy_chk
00000000 g F .text 00000013 __mempcpy_chk
$ objdump -t libc.a | grep __memmove_chk
00000000 g F .text 0000000e __memmove_chk
00000000 g F .text 00000013 __memmove_chk
Although is not an issue for normal static builds, with fortify=3
glibc itself might use the fortify chk functions and thus static
build might fail with multiple definitions. For instance:
x86_64-glibc-linux-gnu-gcc -m32 -march=i686 -o [...]math/test-signgam-uchar-static -nostdlib -nostartfiles -static -static-pie [...]
x86_64-glibc-linux-gnu/bin/ld: [...]/libc.a(mempcpy-ia32.o):
in function `__mempcpy_chk': [...]/glibc-git/string/../sysdeps/i386/i686/mempcpy.S:32: multiple definition of `__mempcpy_chk';
[...]/libc.a(mempcpy_chk-nonshared.o):[...]/debug/../sysdeps/i386/mempcpy_chk.S:28: first defined here
collect2: error: ld returned 1 exit status
make[2]: *** [../Rules:298:
There is no need for mem*-nonshared.S, the __mem*_chk routines
are already provided by the assembly routines.
Checked on i686-linux-gnu with gcc 13 built with fortify=1,2,3 and
without fortify.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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With gcc 11.3.1, building with -D_FORTIFY_SOURCE=2 shows:
In function ‘getgroups’,
inlined from ‘do_test’ at test-errno.c:129:12:
../misc/sys/cdefs.h:195:6: error: argument 1 value -1 is negative
[-Werror=stringop-overflow=]
195 | ? __ ## f ## _alias (__VA_ARGS__)
\
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../posix/bits/unistd.h:115:10: note: in expansion of macro
‘__glibc_fortify’
115 | return __glibc_fortify (getgroups, __size, sizeof (__gid_t),
| ^~~~~~~~~~~~~~~
../posix/bits/unistd.h: In function ‘do_test’:
../posix/bits/unistd-decl.h:135:28: note: in a call to function
‘__getgroups_alias’ declared with attribute ‘access (write_only, 2, 1)’
135 | extern int __REDIRECT_NTH (__getgroups_alias, (int __size,
__gid_t __list[]),
| ^~~~~~~~~~~~~~~~~
../misc/sys/cdefs.h:264:6: note: in definition of macro ‘__REDIRECT_NTH’
264 | name proto __asm__ (__ASMNAME (#alias)) __THROW
It builds fine with gcc 12 and gcc 13.
Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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The compiler might not see that internal definition is an alias
due the libc_ifunc macro, which redefines __strchrnul. With
gcc 6 it fails with:
In file included from <command-line>:0:0:
./../include/libc-symbols.h:472:33: error: ‘__EI___strchrnul’ aliased to
undefined symbol ‘__GI___strchrnul’
extern thread __typeof (name) __EI_##name \
^
./../include/libc-symbols.h:468:3: note: in expansion of macro
‘__hidden_ver2’
__hidden_ver2 (, local, internal, name)
^~~~~~~~~~~~~
./../include/libc-symbols.h:476:29: note: in expansion of macro
‘__hidden_ver1’
# define hidden_def(name) __hidden_ver1(__GI_##name, name, name);
^~~~~~~~~~~~~
./../include/libc-symbols.h:557:32: note: in expansion of macro
‘hidden_def’
# define libc_hidden_def(name) hidden_def (name)
^~~~~~~~~~
../sysdeps/powerpc/powerpc64/multiarch/strchrnul.c:38:1: note: in
expansion of macro ‘libc_hidden_def’
libc_hidden_def (__strchrnul)
^~~~~~~~~~~~~~~
Use libc_ifunc_hidden as stpcpy. Checked on powerpc64 with
gcc 6 and gcc 13.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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The -Wformat-overflow was added by gcc 8.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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Old GCC might trigger the the comparison will always evaluate as ‘true’
warnig for static build:
set-freeres.c:87:14: error: the comparison will always evaluate as
‘true’ for the address of ‘__libc_getgrgid_freemem_ptr’ will never be
NULL [-Werror=address]
if (&__ptr != NULL) \
So add pragma weak for all affected usages.
Checked on x86_64 and i686 with gcc 6 and 13.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
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Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
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Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
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Generated on a Cavium Octeon III 2 board running Linux version 4.19.249
and GCC 13.1.0.
Needed due to commit cf7ffdd8a5f6 ("added pair of inputs for hypotf in
binary32").
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This was added in 233399bce2e79e5af3b344782e9943d5f1a9cdcb just for warn_if_unused
warnings rather than anything substantial.
Now that we have a proper configure argument for F_S (--enable-fortify-source),
just drop this entirely, to avoid conflicting with e.g. detected --enable-fortify-source
finding F_S=3, then nscd's Makefile setting F_S=2, resulting in a build-failure
because of the redefinition.
Signed-off-by: Sam James <sam@gentoo.org>
Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
Reviewed-by: Andreas K. Hüttel <dilfridge@gentoo.org>
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Starting with commit 2c6b4b272e6b4d07303af25709051c3e96288f2d
"nptl: Unconditionally use a 32-byte rseq area", the testcase
misc/tst-rseq-disable is UNSUPPORTED as RSEQ_SIG is not defined.
The mentioned commit removes inclusion of sys/rseq.h in nptl/descr.h.
Thus just include sys/rseq.h in the tst-rseq-disable.c as also done
in tst-rseq.c and tst-rseq-nptl.c.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
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If fortify is enabled, the truncated output warning is issued by
the wrapper itself:
In function ‘strncpy’,
inlined from ‘test_strncpy’ at tester.c:505:10:
../string/bits/string_fortified.h:95:10: error: ‘__builtin_strncpy’
destination unchanged after copying no bytes from a string of length 3
[-Werror=stringop-truncation]
95 | return __builtin___strncpy_chk (__dest, __src, __len,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
96 | __glibc_objsize (__dest));
| ~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../include/bits/string_fortified.h:1,
from ../string/string.h:548,
from ../include/string.h:60,
from tester.c:33,
from inl-tester.c:6:
In function ‘strncpy’,
inlined from ‘test_strncpy’ at tester.c:505:10:
Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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If fortify is enabled, the truncated output warning is issued by
the wrapper itself:
bug-strncat1.c: In function ‘main’:
bug-strncat1.c:14:3: error: ‘__builtin___strncat_chk’ output truncated
copying 1 byte from a string of length 2 [-Werror=stringop-truncation]
14 | strncat (d, "\5\6", 1);
| ^
Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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The errno variable is potentially clobbered by the preceding
send call. It is not related to the to-be-cached information.
The parallel code in hstcache.c and servicescache.c already uses
errval.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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This was broken by commit 9c02d0784d ("nss_files: Remove RES_USE_INET6
from hosts processing"), which removed too much.
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Leads to build failures (preprocessor redefinitions), and there is not
enough time to address this properly. Deferred until after 2.38 release.
This reverts commit 59dc07637fa1a693bd7599a98b0735697544077b.
Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
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