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It follows the internal signature:
extern int clone3 (struct clone_args *__cl_args, size_t __size,
int (*__func) (void *__arg), void *__arg);
Checked on riscv64-linux-gnu-rv64imafdc-lp64d.
Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com>
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Signed-off-by: Dridi Boukelmoune <dridi.boukelmoune@gmail.com>
Reviewed-by: Arjun Shankar <arjun@redhat.com>
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Use a scratch_buffer rather than either alloca or malloc to reduce the
possibility of a stack overflow.
Suggested-by: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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Avoid possible stack overflow by removing alloca() and converting to
wide characters within the buffer.
Suggested-by: Paul Eggert <eggert@cs.ucla.edu>
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If `non_temporal_threshold` is below `minimum_non_temporal_threshold`,
it almost certainly means we failed to read the systems cache info.
In this case, rather than defaulting the minimum correct value, we
should default to a value that gets at least reasonable
performance. 64MB is chosen conservatively to be at the very high
end. This should never cause non-temporal stores when, if we had read
cache info, we wouldn't have otherwise.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
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x86_64 needs special alignment when calling functions, so we have to use
MACHINE_THREAD_STATE_SETUP_CALL for the signal thread when forking.
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thread_set_state() is used to set up TLS, so stack protection can not be
used yet.
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All the changes are in comments or '#error' messages.
Applying this commit results in bit-identical rebuild of iconvdata/*.so
Reviewed-by: Florian Weimer <fw@deneb.enyo.de>
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Linux 6.3 adds new constants MFD_NOEXEC_SEAL and MFD_EXEC. Add these
to bits/mman-shared.h (conditional on MFD_NOEXEC_SEAL not already
being defined, similar to the existing conditional on the older MFD_*
macros).
Tested for x86_64.
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Linux 6.3 adds a new constant IP_LOCAL_PORT_RANGE. Add it to the
corresponding bits/in.h in glibc.
Tested for x86_64.
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Linux 6.3 adds constants AT_RSEQ_FEATURE_SIZE and AT_RSEQ_ALIGN; add
them to glibc's elf.h. (Recall that, although elf.h is a
system-independent header, so far we've put AT_* constants there even
if Linux-specific, as discussed in bug 15794. So rather than making
any attempt to fix that issue, the new constants are just added there
alongside the existing ones.)
Tested for x86_64.
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Use a scratch_buffer rather than alloca/malloc to avoid potential stack
overflow.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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This was uncovered by a recent clang change [1]. Different than ISO C,
POSIX states that va_list should be exported by wchar.h [2].
Checked on x86_64-linux-gnu and aarch64-linux-gnu.
[1] https://reviews.llvm.org/D137268
[2] https://pubs.opengroup.org/onlinepubs/9699919799.2018edition/basedefs/wchar.h.html
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This patch checks _dl_debug_vdprintf, by passing various inputs to
_dl_dprintf and comparing the output with invocations of snprintf.
Signed-off-by: Roy Eldar <royeldar0@gmail.com>
Reviewed-by: Florian Weimer <fweimer@redhat.com>
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_dl_debug_vdprintf is a bare-bones printf implementation; currently
printing a signed integer (using "%d" format specifier) behaves
incorrectly when the number is negative, as it just prints the
corresponding unsigned integer, preceeded by a minus sign.
For example, _dl_printf("%d", -1) would print '-4294967295'.
Signed-off-by: Roy Eldar <royeldar0@gmail.com>
Reviewed-by: Florian Weimer <fweimer@redhat.com>
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f55727ca53308a206cf00d0442f8c57c73761899 updated open_path to use the
r_search_path_struct struct but failed to update the comment.
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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When dlopen is being called, efforts have been made to improve
future lookup performance. This includes marking a search path
as non-existent using `stat`. However, if the root directory
is given as a search path, there exists a bug which erroneously
marks it as non-existing.
The bug is reproduced under the following sequence:
1. dlopen is called to open a shared library, with at least:
1) a dependency 'A.so' not directly under the '/' directory
(e.g. /lib/A.so), and
2) another dependency 'B.so' resides in '/'.
2. for this bug to reproduce, 'A.so' should be searched *before* 'B.so'.
3. it first tries to find 'A.so' in /, (e.g. /A.so):
- this will (obviously) fail,
- since it's the first time we have seen the '/' directory,
its 'status' is 'unknown'.
4. `buf[buflen - namelen - 1] = '\0'` is executed:
- it intends to remove the leaf and its final slash,
- because of the speciality of '/', its buflen == namelen + 1,
- it erroneously clears the entire buffer.
6. it then calls 'stat' with the empty buffer:
- which will result in an error.
7. so it marks '/' as 'nonexisting', future lookups will not consider
this path.
8. while /B.so *does* exist, failure to look it up in the '/'
directory leads to a 'cannot open shared object file' error.
This patch fixes the bug by preventing 'buflen', an index to put '\0',
from being set to 0, so that the root '/' is always kept.
Relative search paths are always considered as 'existing' so this
wont be affected.
Writeup by Moody Liu <mooodyhunter@outlook.com>
Suggested-by: Carlos O'Donell <carlos@redhat.com>
Signed-off-by: Qixing ksyx Xue <qixingxue@outlook.com>
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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When the base is 0 or 2 and the first two characters are '0' and 'b',
but the rest are no binary digits. In this case this is no error,
and strtol must return 0 and ENDPTR points to the 'x' or 'b'.
Checked on x86_64-linux-gnu and i686-linux-gnu.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
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Don't strip the trailing slash when checking for existence of a load path
element to handle the special case of the root directory.
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Fix unused result warnings, detected when _FORTIFY_SOURCE is enabled in
glibc.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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Fix unused result warnings, detected when _FORTIFY_SOURCE is enabled in
glibc.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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Fix unused result warnings, detected when _FORTIFY_SOURCE is enabled in
glibc.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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Add list end markers.
Sort text using scripts/sort-makefile-lines.py.
No code generation changes observed in non-test binary artifacts.
No regressions on x86_64 and i686.
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In commit 0b25c28e028b63c95108c442d8112811107e4c13 I updated congure.ac
but neglected to regenerate updated configure.
Fix this here.
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All fixes are in comments, so the binaries should be identical
before/after this commit, but I can't verify this.
Reviewed-by: Rajalakshmi Srinivasaraghavan <rajis@linux.ibm.com>
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Applying this commit results in bit-identical rebuild of
libc.so.6 math/libm.so.6 elf/ld-linux-x86-64.so.2 mathvec/libmvec.so.1
Reviewed-by: Florian Weimer <fweimer@redhat.com>
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Applying this commit results in bit-identical rebuild of libc.so.6
math/libm.so.6 elf/ld-linux-x86-64.so.2 mathvec/libmvec.so.1
Reviewed-by: Florian Weimer <fweimer@redhat.com>
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Fixes: 196358ae26aa ("mach: Fix installing mach_i386.h")
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Applying this commit results in a bit-identical rebuild of
mathvec/libmvec.so.1 (which is the only binary that gets rebuilt).
Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
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We do not want mach_i386.h to get installed into machine/, but into
i386/ or x86_64/ depending where mach_i386.defs was found, i.e.
according to 32/64 bitness.
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We need O_EXEC for __rtld_execve
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This is notably necessary for running the gmon thread.
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Some of the s390-specific configure checks are using compile and
link configure tests. Now use only compile tests as the link
tests fails when e.g. bootstrapping a cross-toolchain due to
missing crt-files/libc.so. This is achieved by using
AC_COMPILE_IFELSE in configure.ac file.
This is observable e.g. when using buildroot which builds glibc
only once or the build-many-glibcs.py script. Note that the latter
one is building glibc twice in the compilers-step (configure-checks
fails) and in the glibcs-step (configure-checks succeed).
Note, that the s390 specific configure tests for static PIE have to
link an executable to test binutils support. Thus we can't fix
those tests.
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We need to include hurd.h for libc_hidden_proto (__hurd_thread_self),
introduced in b44c1e12524b ("hurd: Fix using interposable
hurd_thread_self")
This the error log:
In file included from <command-line>:
./../include/libc-symbols.h:472:33: error: '__EI___hurd_thread_self' aliased to undefined symbol '__GI___hurd_thread_self'
472 | extern thread __typeof (name) __EI_##name \
| ^~~~~
./../include/libc-symbols.h:468:3: note: in expansion of macro '__hidden_ver2'
468 | __hidden_ver2 (, local, internal, name)
| ^~~~~~~~~~~~~
./../include/libc-symbols.h:476:41: note: in expansion of macro '__hidden_ver1'
476 | # define hidden_def(name) __hidden_ver1(__GI_##name, name, name);
| ^~~~~~~~~~~~~
./../include/libc-symbols.h:557:32: note: in expansion of macro 'hidden_def'
557 | # define libc_hidden_def(name) hidden_def (name)
| ^~~~~~~~~~
thread-self.c:27:1: note: in expansion of macro 'libc_hidden_def'
27 | libc_hidden_def (__hurd_thread_self)
| ^~~~~~~~~~~~~~~
Message-Id: <ZGr6wj2UOxg3F0qH@jupiter.tail36e24.ts.net>
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Fixes 85f7554cd97e7f03d8dc66278653045ef63a2221
"Add test case for O_TMPFILE handling in open, openat"
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230520115531.3911877-3-bugaevc@gmail.com>
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Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230520115531.3911877-2-bugaevc@gmail.com>
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The __hurd_fail () inline function is the dedicated, idiomatic way of
reporting errors in the Hurd part of glibc. Not only is it more concise
than '{ errno = err; return -1; }', it is since commit
6639cc10029e24e06b34e169712b21c31b8cf213
"hurd: Mark error functions as __COLD" marked with the cold attribute,
telling the compiler that this codepath is unlikely to be executed.
In one case, use __hurd_dfail () over the plain __hurd_fail ().
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230520115531.3911877-1-bugaevc@gmail.com>
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Removed -mabi=ieeelongdouble on failing tests. It resolves the error.
error: ‘-mabi=ieeelongdouble’ requires ‘-mlong-double-128’
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Create a private hidden __hurd_thread_self alias, and use that one.
Fixes 2f8ecb58a59eb82c43214d000842d99644a662d1
"hurd: Fix x86_64 _hurd_tls_fork" and
c7fcce38c83a2bb665ef5dc4981bf20c7e586123
"hurd: Make sure to not use tcb->self"
Reported-by: Joseph Myers <joseph@codesourcery.com>
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
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4d3f846b88d3 ("hurd: Fix __TIMESIZE on x86_64") incidentaly dropped it
because it fixed hurd 64bit into setting __TIMESIZE to 64, and that case
was not having gai_suspend defined yet.
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We had sizeof (time_t) == 8, but __TIMESIZE == 32.
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230519171516.3698754-1-bugaevc@gmail.com>
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Fix LOCALE list formatting.
Sort all reflowed text using scripts/sort-makefile-lines.py.
No code generation changes observed in binary artifacts.
No regressions on x86_64 and i686.
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90604f670c10 ("hurd 64bit: Add data for check-c++-types") actually added
the 32bit version. This fixes it into a 64bit version.
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Reflow all long lines adding comment terminators.
Sort all reflowed text using scripts/sort-makefile-lines.py.
No code generation changes observed in binary artifacts.
No regressions on x86_64 and i686.
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Reflow all long lines adding comment terminators.
Sort all reflowed text using scripts/sort-makefile-lines.py.
No regressions running microbenchmarks.
No code generation changes observed in binary artifacts.
No regressions on x86_64 and i686.
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Reflow all long lines adding comment terminators.
Sort all reflowed text using scripts/sort-makefile-lines.py.
No code generation changes observed in binary artifacts.
No regressions on x86_64 and i686.
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