H.J. Lu [Fri, 15 Jan 2021 14:46:12 +0000 (06:46 -0800)]
Use <startup.h> in __libc_init_secure
Since __libc_init_secure is called before ARCH_SETUP_TLS, it must use
"int $0x80" for system calls in i386 static PIE. Add startup_getuid,
startup_geteuid, startup_getgid and startup_getegid to <startup.h>.
Update __libc_init_secure to use them.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
H.J. Lu [Mon, 18 Jan 2021 11:45:46 +0000 (11:45 +0000)]
elf: Avoid RELATIVE relocation for _dl_sysinfo
Set the default _dl_sysinfo in _dl_aux_init to avoid RELATIVE relocation
in static PIE.
This is needed for fixing bug 27072 on x86.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
H.J. Lu [Fri, 15 Jan 2021 02:39:24 +0000 (18:39 -0800)]
libmvec: Add extra-test-objs to test-extras
Add extra-test-objs to test-extras so that they are compiled with
-DMODULE_NAME=testsuite instead of -DMODULE_NAME=libc.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
H.J. Lu [Tue, 19 Jan 2021 02:19:16 +0000 (18:19 -0800)]
Hurd: Add rtld-strncpy-c.c
All IFUNC functions which are used in ld.so must have a rtld version if
the IFUNC version isn't safe to use in ld.so.
Joseph Myers [Mon, 18 Jan 2021 21:36:00 +0000 (21:36 +0000)]
Update MIPS libm-test-ulps.
Joseph Myers [Mon, 18 Jan 2021 20:22:51 +0000 (20:22 +0000)]
Update arm libm-test-ulps.
Joseph Myers [Mon, 18 Jan 2021 20:21:07 +0000 (20:21 +0000)]
Update powerpc-nofpu libm-test-ulps.
John David Anglin [Mon, 18 Jan 2021 14:23:10 +0000 (14:23 +0000)]
Update hppa libm-test-ulps
Vineet Gupta [Mon, 18 Jan 2021 00:39:45 +0000 (16:39 -0800)]
ARC: nofpu: Regenerate ulps
H.J. Lu [Sun, 12 Jul 2020 13:04:53 +0000 (06:04 -0700)]
ld.so: Add --list-tunables to print tunable values
Pass --list-tunables to ld.so to print tunables with min and max values.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Stafford Horne [Thu, 7 Jan 2021 21:45:36 +0000 (06:45 +0900)]
math/test-tgmath2: Fix fabs failure when no long double
I have been testing with GCC trunk and GLIBC master while working on the
OpenRISC port. This test has been failing with fabs not being called,
This is caused as my architecture is configure with no long double
meaning the two calls are the same:
TEST (fabs (Vdouble1), double, fabs);
TEST (fabs (Vldouble1), ldouble, fabs);
Instead of the tgmath calls resolving to fabs and fabsl both calls are
fabs. Next, do to compiler optimiations the second call is eliminated.
Fix this by invoking the failing TEST with Vldouble2.
Note, I also updated the FAIL message to more clearly show where the
failure happened, so I see:
FAIL: math/test-tgmath2
original exit status 1
wrong function called, fabs (ldouble) failure on line 174
Cc: Joseph Myers <joseph@codesourcery.com>
H.J. Lu [Fri, 18 Sep 2020 14:55:14 +0000 (07:55 -0700)]
x86: Move x86 processor cache info to cpu_features
1. Move x86 processor cache info to _dl_x86_cpu_features in ld.so.
2. Update tunable bounds with TUNABLE_SET_WITH_BOUNDS.
3. Move x86 cache info initialization to dl-cacheinfo.h and initialize
x86 cache info in init_cpu_features ().
4. Put x86 cache info for libc in cacheinfo.h, which is included in
libc-start.c in libc.a and is included in cacheinfo.c in libc.so.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Adhemerval Zanella [Thu, 14 Jan 2021 14:18:21 +0000 (11:18 -0300)]
Fix x86 build with --enable-tunable=no
Checked on x86_64-linux-gnu.
H.J. Lu [Mon, 4 Jan 2021 22:25:39 +0000 (14:25 -0800)]
ifuncmain6pie: Remove the circular IFUNC dependency [BZ #20019]
On x86, ifuncmain6pie failed with:
[hjl@gnu-cfl-2 build-i686-linux]$ ./elf/ifuncmain6pie --direct
./elf/ifuncmain6pie: IFUNC symbol 'foo' referenced in '/export/build/gnu/tools-build/glibc-32bit/build-i686-linux/elf/ifuncmod6.so' is defined in the executable and creates an unsatisfiable circular dependency.
[hjl@gnu-cfl-2 build-i686-linux]$ readelf -rW elf/ifuncmod6.so | grep foo
00003ff4 00000706 R_386_GLOB_DAT
0000400c foo_ptr
00003ff8 00000406 R_386_GLOB_DAT
00000000 foo
0000400c 00000401 R_386_32
00000000 foo
[hjl@gnu-cfl-2 build-i686-linux]$
Remove non-JUMP_SLOT relocations against foo in ifuncmod6.so, which
trigger the circular IFUNC dependency, and build ifuncmain6pie with
-Wl,-z,lazy.
Siddhesh Poyarekar [Wed, 13 Jan 2021 03:38:07 +0000 (09:08 +0530)]
Use the right argument code in unnormal tests
Use the right argument code (j) in the unnormal tests and cast inputs
from the ieee_long_double_shape_type struct to Float64x to properly
test it.
H.J. Lu [Sat, 5 Dec 2020 15:01:58 +0000 (07:01 -0800)]
ldconfig/x86: Store ISA level in cache and aux cache
Store ISA level in the portion of the unused upper 32 bits of the hwcaps
field in cache and the unused pad field in aux cache. ISA level is stored
and checked only for shared objects in glibc-hwcaps subdirectories. The
shared objects in the default directories aren't checked since there are
no fallbacks for these shared objects.
Tested on x86-64-v2, x86-64-v3 and x86-64-v4 machines with
--disable-hardcoded-path-in-tests and --enable-hardcoded-path-in-tests.
Szabolcs Nagy [Mon, 11 Jan 2021 09:04:53 +0000 (09:04 +0000)]
elf: work around a gcc bug in elf_get_dynamic_info
Since commit
2f056e8a5dd4dc0f075413f931e82cede37d1057
"aarch64: define PI_STATIC_AND_HIDDEN",
building glibc with gcc-8 on aarch64 fails with
/BLD/elf/librtld.os: in function `elf_get_dynamic_info':
/SRC/elf/get-dynamic-info.h:70:(.text+0xad8): relocation truncated to
fit: R_AARCH64_ADR_PREL_PG_HI21 against symbol `_rtld_local' defined
in .data section in /BLD/elf/librtld.os
This is a gcc bug:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98618
The bug is fixed on gcc-10 and not yet backported. gcc-9 is affected,
but the issue happens to not trigger in glibc, gcc-8 and older seems
to miscompile rtld.os.
Rewriting the affected code in elf_get_dynamic_info seems to make the
issue go away on <= gcc-9.
The change makes the logic a bit clearer too (by separating the index
computation and array update) and drops an older gcc workaround (since
gcc 4.6 is no longer supported).
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
H.J. Lu [Wed, 13 Jan 2021 03:00:13 +0000 (19:00 -0800)]
x86: Set header.feature_1 in TCB for always-on CET [BZ #27177]
Update dl_cet_check() to set header.feature_1 in TCB when both IBT and
SHSTK are always on.
Adhemerval Zanella [Tue, 12 Jan 2021 12:17:09 +0000 (09:17 -0300)]
posix: consume less entropy on tempname
The first getrandom is used only for __GT_NOCREATE, which is inherently
insecure and can use the entropy as a small improvement. On the
second and later attempts it might help against DoS attacks.
It sync with gnulib commit
854fbb81d91f7a0f2b463e7ace2499dee2f380f2.
Checked on x86_64-linux-gnu.
Florian Weimer [Tue, 12 Jan 2021 11:22:47 +0000 (12:22 +0100)]
Makerules: Do not require startup files for format.lds probe object
During statically linked bootstrap, the compiler does not have
the required startup files, so do a smaller dummy link to obtain
the output format information.
Fixes commit
87d583c6e8cd0e49f64da76636ebeec033298b4d ("install:
Replace scripts/output-format.sed with objdump -f [BZ #26559]").
Fangrui Song [Mon, 11 Jan 2021 19:56:54 +0000 (11:56 -0800)]
install: Replace scripts/output-format.sed with objdump -f [BZ #26559]
GNU ld and gold have supported --print-output-format since 2011. glibc
requires binutils>=2.25 (2015), so if LD is GNU ld or gold, we can
assume the option is supported.
lld is by default a cross linker supporting multiple targets. It auto
detects the file format and does not need OUTPUT_FORMAT. It does not
support --print-output-format.
By parsing objdump -f, we can support all the three linkers.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Adhemerval Zanella [Mon, 11 Jan 2021 19:38:40 +0000 (16:38 -0300)]
math: Add BZ#18980 fix back on dbl-64 cosh
It is regression from
9e97f239eae1f2b1 (Remove dbl-64/wordsize-64
(part 2)) where is missed to add the BZ#18980 fix (
9e97f239eae1f2b1).
Checked on i686-linux-gnu.
Adhemerval Zanella [Tue, 29 Sep 2020 11:56:07 +0000 (08:56 -0300)]
posix: Sync tempname with gnulib [BZ #26648]
It syncs with gnulib commit
b1268f22f443e8e4b9e. The try_tempname_len
now uses getrandom on each iteration to get entropy and only uses the
clock plus ASLR as source of entropy if getrandom fails.
Checked on x86_64-linux-gnu and i686-linux-gnu.
Adhemerval Zanella [Fri, 11 Dec 2020 18:23:05 +0000 (15:23 -0300)]
posix: Fix return value of system if shell can not be executed [BZ #27053]
POSIX states that system returned code for failure to execute the shell
shall be as if the shell had terminated using _exit(127). This
behaviour was removed with
5fb7fc96350575.
Checked on x86_64-linux-gnu.
Adhemerval Zanella [Mon, 14 Dec 2020 14:42:33 +0000 (11:42 -0300)]
support: Add xchmod wrapper
Checked on x86_64-linux-gnu.
Joseph Myers [Mon, 11 Jan 2021 14:57:08 +0000 (14:57 +0000)]
Update STATX_ATTR_DAX value from Linux 5.10.
This patch updates the value of STATX_ATTR_DAX in bits/statx-generic.h
for a change made in Linux 5.10. (As with previous such changes, this
only does anything if glibc is being used with old kernel headers.)
Tested for x86_64.
Vincent Chen [Tue, 15 Dec 2020 09:16:40 +0000 (17:16 +0800)]
riscv: Initialize $gp before resolving the IRELATIVE relocation
The $gp register may be used to access the global variable in
the PDE program, so the $gp register should be initialized before
executing the IFUNC resolver of PDE program to avoid unexpected
error occurs.
Vincent Chen [Tue, 15 Dec 2020 09:16:39 +0000 (17:16 +0800)]
riscv: support GNU indirect function
Enable riscv glibc to support GNU indirect function
Martin Sebor [Sun, 10 Jan 2021 20:45:39 +0000 (13:45 -0700)]
posix: Correct attribute access mode on readlinkat [BZ #27024].
Alexandra Hájková [Sat, 26 Dec 2020 19:44:34 +0000 (20:44 +0100)]
Add xfchmod to libsupport
Alexandra Hájková [Sat, 26 Dec 2020 17:45:13 +0000 (18:45 +0100)]
Add xchdir to libsupport.
Marc Aurèle La France [Sat, 9 Jan 2021 04:55:58 +0000 (21:55 -0700)]
POSIX locale: Fix typo in comment
Vineet Gupta [Wed, 6 Jan 2021 18:52:40 +0000 (10:52 -0800)]
ARC: Regenerate ulps
Reinstate pass for
FAIL: math/test-double-cosh
FAIL: math/test-double-sinh
FAIL: math/test-float32x-cosh
FAIL: math/test-float32x-sinh
FAIL: math/test-float64-cosh
FAIL: math/test-float64-sinh
FAIL: math/test-ldouble-cosh
FAIL: math/test-ldouble-sinh
Siddhesh Poyarekar [Fri, 8 Jan 2021 15:31:25 +0000 (21:01 +0530)]
mntent: Use __putc_unlocked instead of fputc_unlocked
__putc_unlocked is guaranteed to be inlined all the time as opposed to
fputc_unlocked, which does not get inlined when glibc is built with
-Os.
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
Szabolcs Nagy [Tue, 5 Jan 2021 16:10:40 +0000 (16:10 +0000)]
aarch64: define PI_STATIC_AND_HIDDEN
AArch64 always uses pc relative access to static and hidden object
symbols, but the config setting was previously missing.
This affects ld.so start up code.
Siddhesh Poyarekar [Fri, 8 Jan 2021 03:47:06 +0000 (09:17 +0530)]
Update NEWS for CVE-2019-25013.
H.J. Lu [Fri, 9 Oct 2020 13:06:56 +0000 (06:06 -0700)]
x86: Support GNU_PROPERTY_X86_ISA_1_V[234] marker [BZ #26717]
GCC 11 supports -march=x86-64-v[234] to enable x86 micro-architecture ISA
levels:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97250
and -mneeded to emit GNU_PROPERTY_X86_ISA_1_NEEDED property with
GNU_PROPERTY_X86_ISA_1_V[234] marker:
https://gitlab.com/x86-psABIs/x86-64-ABI/-/merge_requests/13
Binutils support for GNU_PROPERTY_X86_ISA_1_V[234] marker were added by
commit
b0ab06937385e0ae25cebf1991787d64f439bf12
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Fri Oct 30 06:49:57 2020 -0700
x86: Support GNU_PROPERTY_X86_ISA_1_BASELINE marker
and
commit
32930e4edbc06bc6f10c435dbcc63131715df678
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Fri Oct 9 05:05:57 2020 -0700
x86: Support GNU_PROPERTY_X86_ISA_1_V[234] marker
GNU_PROPERTY_X86_ISA_1_NEEDED property in x86 ELF binaries indicate the
micro-architecture ISA level required to execute the binary. The marker
must be added by programmers explicitly in one of 3 ways:
1. Pass -mneeded to GCC.
2. Add the marker in the linker inputs as this patch does.
3. Pass -z x86-64-v[234] to the linker.
Add GNU_PROPERTY_X86_ISA_1_BASELINE and GNU_PROPERTY_X86_ISA_1_V[234]
marker support to ld.so if binutils 2.32 or newer is used to build glibc:
1. Add GNU_PROPERTY_X86_ISA_1_BASELINE and GNU_PROPERTY_X86_ISA_1_V[234]
markers to elf.h.
2. Add GNU_PROPERTY_X86_ISA_1_BASELINE and GNU_PROPERTY_X86_ISA_1_V[234]
marker to abi-note.o based on the ISA level used to compile abi-note.o,
assuming that the same ISA level is used to compile the whole glibc.
3. Add isa_1 to cpu_features to record the supported x86 ISA level.
4. Rename _dl_process_cet_property_note to _dl_process_property_note and
add GNU_PROPERTY_X86_ISA_1_V[234] marker detection.
5. Update _rtld_main_check and _dl_open_check to check loaded objects
with the incompatible ISA level.
6. Add a testcase to verify that dlopen an x86-64-v4 shared object fails
on lesser platforms.
7. Use <get-isa-level.h> in dl-hwcaps-subdirs.c and tst-glibc-hwcaps.c.
Tested under i686, x32 and x86-64 modes on x86-64-v2, x86-64-v3 and
x86-64-v4 machines.
Marked elf/tst-isa-level-1 with x86-64-v4, ran it on x86-64-v3 machine
and got:
[hjl@gnu-cfl-2 build-x86_64-linux]$ ./elf/tst-isa-level-1
./elf/tst-isa-level-1: CPU ISA level is lower than required
[hjl@gnu-cfl-2 build-x86_64-linux]$
Wilco Dijkstra [Thu, 7 Jan 2021 15:26:26 +0000 (15:26 +0000)]
Remove dbl-64/wordsize-64 (part 2)
Remove the wordsize-64 implementations by merging them into the main dbl-64
directory. The second patch just moves all wordsize-64 files and removes a
few wordsize-64 uses in comments and Implies files.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Wilco Dijkstra [Thu, 7 Jan 2021 15:02:51 +0000 (15:02 +0000)]
Remove dbl-64/wordsize-64
Remove the wordsize-64 implementations by merging them into the main dbl-64
directory. The first patch adds special cases needed for 32-bit targets
(FIX_INT_FP_CONVERT_ZERO and FIX_DBL_LONG_CONVERT_OVERFLOW) to the
wordsize-64 versions. This has no effect on 64-bit targets since they don't
define these macros.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Joseph Myers [Wed, 6 Jan 2021 18:23:00 +0000 (18:23 +0000)]
Add SEGV_MTEAERR and SEGV_MTESERR from Linux 5.10.
Linux 5.10 adds constants SEGV_MTEAERR and SEGV_MTESERR to
asm-generic/siginfo.h. Add these to glibc's bits/siginfo-consts.h.
Tested for x86_64.
Adhemerval Zanella [Tue, 29 Dec 2020 14:52:41 +0000 (11:52 -0300)]
support: Add support_small_thread_stack_size
It returns the minimum stack size large enough to cover most internal
glibc stack usage.
Adhemerval Zanella [Tue, 29 Dec 2020 14:37:34 +0000 (11:37 -0300)]
stdlib: Sync canonicalize with gnulib [BZ #10635] [BZ #26592] [BZ #26341] [BZ #24970]
It sync with gnulib version
ae9fb3d66. The testcase for BZ#23741
(stdlib/test-bz22786.c) is adjusted to check also for ENOMEM.
The patch fixes multiple realpath issues:
- Portability fixes for errno clobbering on free (BZ#10635). The
function does not call free directly anymore, although it might be
done through scratch_buffer_free. The free errno clobbering is
being tracked by BZ#17924.
- Pointer arithmetic overflows in realpath (BZ#26592).
- Realpath cyclically call __alloca(path_max) to consume too much
stack space (BZ#26341).
- Realpath mishandles EOVERFLOW; stat not needed anyway (BZ#24970).
The check is done through faccessat now.
Checked on x86_64-linux-gnu and i686-linux-gnu.
Adhemerval Zanella [Mon, 28 Dec 2020 12:50:23 +0000 (09:50 -0300)]
malloc: Add scratch_buffer_dupfree
It returns a copy of the buffer up to a defined size. It will be used
on realpath sync with gnulib.
Adhemerval Zanella [Tue, 29 Dec 2020 13:27:56 +0000 (10:27 -0300)]
Import filename.h from gnulib
And use to simplify stdlib/canonicalize.c implementation.
Adhemerval Zanella [Tue, 29 Dec 2020 13:27:28 +0000 (10:27 -0300)]
Import idx.h from gnulib
And use to simplify stdlib/canonicalize.c implementation.
Adhemerval Zanella [Tue, 5 Jan 2021 14:22:25 +0000 (11:22 -0300)]
alpha: Provide wait4 for static library [BZ #27150]
This ia regression from
09153638cfef91, versioned_symbol acts as
weak_alias for !SHARED but it is undefined to avoid non versioned
alias from the generic implementation.
Checked with a build for alpha-linux-gnu.
Shuo Wang [Tue, 5 Jan 2021 02:04:12 +0000 (10:04 +0800)]
aarch64: push the set of rules before falling into slow path
It is supposed to save the rules for the instructions before falling into slow path.
Tested in glibc-2.28 before fixing:
Thread 2 "xxxxxxx" hit Breakpoint 1, _dl_tlsdesc_dynamic () at ../sysdeps/aarch64/dl-tlsdesc.S:149
149 stp x1, x2, [sp, #-32]!
Missing separate debuginfos, use: dnf debuginfo-install libgcc-7.3.0-
20190804.h24.aarch64
(gdb) ni
_dl_tlsdesc_dynamic () at ../sysdeps/aarch64/dl-tlsdesc.S:150
150 stp x3, x4, [sp, #16]
(gdb)
_dl_tlsdesc_dynamic () at ../sysdeps/aarch64/dl-tlsdesc.S:157
157 mrs x4, tpidr_el0
(gdb)
158 ldr PTR_REG (1), [x0,#TLSDESC_ARG]
(gdb)
159 ldr PTR_REG (0), [x4,#TCBHEAD_DTV]
(gdb)
160 ldr PTR_REG (3), [x1,#TLSDESC_GEN_COUNT]
(gdb)
161 ldr PTR_REG (2), [x0,#DTV_COUNTER]
(gdb)
162 cmp PTR_REG (3), PTR_REG (2)
(gdb)
163 b.hi 2f
(gdb)
165 ldp PTR_REG (2), PTR_REG (3), [x1,#TLSDESC_MODID]
(gdb)
166 add PTR_REG (0), PTR_REG (0), PTR_REG (2), lsl #(PTR_LOG_SIZE + 1)
(gdb)
167 ldr PTR_REG (0), [x0] /* Load val member of DTV entry. */
(gdb)
168 cmp PTR_REG (0), #TLS_DTV_UNALLOCATED
(gdb)
169 b.eq 2f
(gdb) bt
#0 _dl_tlsdesc_dynamic () at ../sysdeps/aarch64/dl-tlsdesc.S:169
#1 0x0000ffffbe4fbb44 in OurFunction (threadId=
4294967295)
at /home/test/test_function.c:30
#2 0x0000000000400c08 in initaaa () at thread.c:58
#3 0x0000000000400c50 in thread_proc (param=0x0) at thread.c:71
#4 0x0000ffffbf6918bc in start_thread (arg=0xfffffffff29f) at pthread_create.c:486
#5 0x0000ffffbf5669ec in thread_start () at ../sysdeps/unix/sysv/linux/aarch64/clone.S:78
(gdb) ni
_dl_tlsdesc_dynamic () at ../sysdeps/aarch64/dl-tlsdesc.S:184
184 stp x29, x30, [sp,#-16*NSAVEXREGPAIRS]!
(gdb) bt
#0 _dl_tlsdesc_dynamic () at ../sysdeps/aarch64/dl-tlsdesc.S:184
#1 0x0000ffffbe4fbb44 in OurFunction (threadId=
4294967295)
at /home/test/test_function.c:30
#2 0x0000000000000000 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
Co-authored-by: liqingqing <liqingqing3@huawei.com>
Jangwoong Kim [Sat, 2 Jan 2021 11:57:37 +0000 (20:57 +0900)]
nptl: Fix comment typo in pthread_cond_wait.c
H.J. Lu [Mon, 28 Dec 2020 13:28:49 +0000 (05:28 -0800)]
x86: Check IFUNC definition in unrelocated executable [BZ #20019]
Calling an IFUNC function defined in unrelocated executable also leads to
segfault. Issue a fatal error message when calling IFUNC function defined
in the unrelocated executable from a shared library.
Samuel Thibault [Mon, 4 Jan 2021 19:22:59 +0000 (20:22 +0100)]
hurd: Fix mmap(!MAP_FIXED) on bogus address
In the !MAP_FIXED case, when a bogus address is given mmap should pick up a
valide address rather than returning EINVAL: Posix only talks about
EINVAL for the MAP_FIXED case.
This fixes long-running ghc processes.
H.J. Lu [Sat, 25 Jan 2020 22:19:40 +0000 (14:19 -0800)]
x86-64: Avoid rep movsb with short distance [BZ #27130]
When copying with "rep movsb", if the distance between source and
destination is N*4GB + [1..63] with N >= 0, performance may be very
slow. This patch updates memmove-vec-unaligned-erms.S for AVX and
AVX512 versions with the distance in RCX:
cmpl $63, %ecx
// Don't use "rep movsb" if ECX <= 63
jbe L(Don't use rep movsb")
Use "rep movsb"
Benchtests data with bench-memcpy, bench-memcpy-large, bench-memcpy-random
and bench-memcpy-walk on Skylake, Ice Lake and Tiger Lake show that its
performance impact is within noise range as "rep movsb" is only used for
data size >= 4KB.
Shuo Wang [Mon, 4 Jan 2021 12:42:52 +0000 (20:42 +0800)]
aarch64: fix stack missing after sp is updated
After sp is updated, the CFA offset should be set before next instruction.
Tested in glibc-2.28:
Thread 2 "xxxxxxx" hit Breakpoint 1, _dl_tlsdesc_dynamic () at ../sysdeps/aarch64/dl-tlsdesc.S:149
149 stp x1, x2, [sp, #-32]!
Missing separate debuginfos, use: dnf debuginfo-install libgcc-7.3.0-
20190804.h24.aarch64
(gdb) bt
#0 _dl_tlsdesc_dynamic () at ../sysdeps/aarch64/dl-tlsdesc.S:149
#1 0x0000ffffbe4fbb44 in OurFunction (threadId=
3194870184)
at /home/test/test_function.c:30
#2 0x0000000000400c08 in initaaa () at thread.c:58
#3 0x0000000000400c50 in thread_proc (param=0x0) at thread.c:71
#4 0x0000ffffbf6918bc in start_thread (arg=0xfffffffff29f) at pthread_create.c:486
#5 0x0000ffffbf5669ec in thread_start () at ../sysdeps/unix/sysv/linux/aarch64/clone.S:78
(gdb) ni
_dl_tlsdesc_dynamic () at ../sysdeps/aarch64/dl-tlsdesc.S:150
150 stp x3, x4, [sp, #16]
(gdb) bt
#0 _dl_tlsdesc_dynamic () at ../sysdeps/aarch64/dl-tlsdesc.S:150
#1 0x0000ffffbe4fbb44 in OurFunction (threadId=
3194870184)
at /home/test/test_function.c:30
#2 0x0000000000000000 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb) ni
_dl_tlsdesc_dynamic () at ../sysdeps/aarch64/dl-tlsdesc.S:157
157 mrs x4, tpidr_el0
(gdb) bt
#0 _dl_tlsdesc_dynamic () at ../sysdeps/aarch64/dl-tlsdesc.S:157
#1 0x0000ffffbe4fbb44 in OurFunction (threadId=
3194870184)
at /home/test/test_function.c:30
#2 0x0000000000400c08 in initaaa () at thread.c:58
#3 0x0000000000400c50 in thread_proc (param=0x0) at thread.c:71
#4 0x0000ffffbf6918bc in start_thread (arg=0xfffffffff29f) at pthread_create.c:486
#5 0x0000ffffbf5669ec in thread_start () at ../sysdeps/unix/sysv/linux/aarch64/clone.S:78
Signed-off-by: liqingqing <liqingqing3@huawei.com>
Signed-off-by: Shuo Wang <wangshuo47@huawei.com>
Florian Weimer [Mon, 4 Jan 2021 15:27:46 +0000 (16:27 +0100)]
nptl: Remove set*id, set*gid files which are not built
Siddhesh Poyarekar [Mon, 4 Jan 2021 12:10:04 +0000 (17:40 +0530)]
Drop nan-pseudo-number.h usage from tests
Make the tests use TEST_COND_intel96 to decide on whether to build the
unnormal tests instead of the macro in nan-pseudo-number.h and then
drop the header inclusion. This unbreaks test runs on all
architectures that do not have ldbl-96.
Also drop the HANDLE_PSEUDO_NUMBERS macro since it is not used
anywhere.
Adhemerval Zanella [Wed, 30 Dec 2020 19:15:38 +0000 (16:15 -0300)]
posix: Sync fnmatch with gnulib
It sync with gnulib commit
43ee1a6bf.
Checked on x86_64-linux-gnu.
Adhemerval Zanella [Wed, 30 Dec 2020 19:14:58 +0000 (16:14 -0300)]
Sync flexmember.h with gnulib
It sync with gnulib commit
43ee1a6bf.
Adhemerval Zanella [Tue, 29 Dec 2020 20:42:52 +0000 (17:42 -0300)]
Sync intprops.h with gnulib
It sync with gnulib commit
43ee1a6bf.
Checked on x86_64-linux-gnu.
Adhemerval Zanella [Tue, 29 Dec 2020 20:41:19 +0000 (17:41 -0300)]
posix: Sync glob code with gnulib
It sync with gnulib commit
43ee1a6bf and fixes and use-after-free
bug (gnulib commit
717766da8926e36).
Checked on x86_64-linux-gnu.
Adhemerval Zanella [Tue, 29 Dec 2020 20:32:25 +0000 (17:32 -0300)]
posix: Sync regex code with gnulib
It sync with gnulib commit
43ee1a6bf. The main change is
9682f18e9.
(which does not have a meaniful description).
Checked on x86_64-linux-gnu.
Siddhesh Poyarekar [Fri, 1 Jan 2021 00:57:11 +0000 (06:27 +0530)]
Move generic nan-pseudo-number.h to ldbl-96
The concept of pseudo number formats only exists in the realm of the
96 bit long double format.
Paul Eggert [Sat, 2 Jan 2021 20:46:25 +0000 (12:46 -0800)]
Sync FDL from https://gnu.org/licenses/fdl-1.3.texi
Paul Eggert [Sat, 2 Jan 2021 20:43:58 +0000 (12:43 -0800)]
Sync move-if-change from Gnulib
This alters move-if-change so that its --version option outputs
the correct copyright date automatically. One less thing
to update by hand.
Paul Eggert [Sat, 2 Jan 2021 19:56:24 +0000 (11:56 -0800)]
Update automatically-generated copyright dates
These were updated simply by running "make" to regen the files.
Paul Eggert [Sat, 2 Jan 2021 19:47:54 +0000 (11:47 -0800)]
Update copyright dates not handled by scripts/update-copyrights.
I've updated copyright dates in glibc for 2021. This is the patch for
the changes not generated by scripts/update-copyrights and subsequent
build / regeneration of generated files. As well as the usual annual
updates, mainly dates in --version output (minus csu/version.c which
previously had to be handled manually but is now successfully updated
by update-copyrights), there is a small change to the copyright notice
in NEWS which should let NEWS get updated automatically next year.
Please remember to include 2021 in the dates for any new files added
in future (which means updating any existing uncommitted patches you
have that add new files to use the new copyright dates in them).
Paul Eggert [Sat, 2 Jan 2021 19:32:25 +0000 (11:32 -0800)]
Update copyright dates with scripts/update-copyrights
I used these shell commands:
../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")
and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master
Szabolcs Nagy [Thu, 17 Dec 2020 10:03:05 +0000 (10:03 +0000)]
aarch64: use PTR_ARG and SIZE_ARG instead of DELOUSE
DELOUSE was added to asm code to make them compatible with non-LP64
ABIs, but it is an unfortunate name and the code was not compatible
with ABIs where pointer and size_t are different. Glibc currently
only supports the LP64 ABI so these macros are not really needed or
tested, but for now the name is changed to be more meaningful instead
of removing them completely.
Some DELOUSE macros were dropped: clone, strlen and strnlen used it
unnecessarily.
The out of tree ILP32 patches are currently not maintained and will
likely need a rework to rebase them on top of the time64 changes.
Siddhesh Poyarekar [Tue, 15 Dec 2020 18:20:09 +0000 (23:50 +0530)]
nonstring: Enable __FORTIFY_LEVEL=3
Use __builtin_dynamic_object_size in the remaining functions that
don't have compiler builtins as is the case for string functions.
Siddhesh Poyarekar [Wed, 30 Dec 2020 05:39:58 +0000 (11:09 +0530)]
string: Enable __FORTIFY_LEVEL=3
This change enhances fortified string functions to use
__builtin_dynamic_object_size under _FORTIFY_SOURCE=3 whenever the
compiler supports it.
Siddhesh Poyarekar [Wed, 30 Dec 2020 06:24:00 +0000 (11:54 +0530)]
Introduce _FORTIFY_SOURCE=3
Introduce a new _FORTIFY_SOURCE level of 3 to enable additional
fortifications that may have a noticeable performance impact, allowing
more fortification coverage at the cost of some performance.
With llvm 9.0 or later, this will replace the use of
__builtin_object_size with __builtin_dynamic_object_size.
__builtin_dynamic_object_size
-----------------------------
__builtin_dynamic_object_size is an LLVM builtin that is similar to
__builtin_object_size. In addition to what __builtin_object_size
does, i.e. replace the builtin call with a constant object size,
__builtin_dynamic_object_size will replace the call site with an
expression that evaluates to the object size, thus expanding its
applicability. In practice, __builtin_dynamic_object_size evaluates
these expressions through malloc/calloc calls that it can associate
with the object being evaluated.
A simple motivating example is below; -D_FORTIFY_SOURCE=2 would miss
this and emit memcpy, but -D_FORTIFY_SOURCE=3 with the help of
__builtin_dynamic_object_size is able to emit __memcpy_chk with the
allocation size expression passed into the function:
void *copy_obj (const void *src, size_t alloc, size_t copysize)
{
void *obj = malloc (alloc);
memcpy (obj, src, copysize);
return obj;
}
Limitations
-----------
If the object was allocated elsewhere that the compiler cannot see, or
if it was allocated in the function with a function that the compiler
does not recognize as an allocator then __builtin_dynamic_object_size
also returns -1.
Further, the expression used to compute object size may be non-trivial
and may potentially incur a noticeable performance impact. These
fortifications are hence enabled at a new _FORTIFY_SOURCE level to
allow developers to make a choice on the tradeoff according to their
environment.
Siddhesh Poyarekar [Thu, 10 Dec 2020 11:17:02 +0000 (16:47 +0530)]
Warn on unsupported fortification levels
Make the _FORTIFY_SOURCE macro soup in features.h warn about
unsupported fortification levels. For example, it will warn about
_FORTIFY_SOURCE=3 and over with an indication of which level has been
selected.
Co-authored-by: Paul Eggert <eggert@cs.ucla.edu>
Matheus Castanho [Thu, 3 Dec 2020 17:15:28 +0000 (14:15 -0300)]
powerpc: Use scv instruction on clone when available
clone already uses r31 to temporarily save input arguments before doing the
syscall, so we use a different register to read from the TCB. We can also avoid
allocating another stack frame, which is not needed since we can simply extend
the usage of the red zone.
Tested-by: Lucas A. M. Magalhães <lamm@linux.ibm.com>
Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
Matheus Castanho [Thu, 3 Dec 2020 17:15:27 +0000 (14:15 -0300)]
powerpc: Runtime selection between sc and scv for syscalls
Linux kernel v5.9 added support for system calls using the scv
instruction for POWER9 and later. The new codepath provides better
performance (see below) if compared to using sc. For the
foreseeable future, both sc and scv mechanisms will co-exist, so this
patch enables glibc to do a runtime check and use scv when it is
available.
Before issuing the system call to the kernel, we check hwcap2 in the TCB
for PPC_FEATURE2_SCV to see if scv is supported by the kernel. If not,
we fallback to sc and keep the old behavior.
The kernel implements a different error return convention for scv, so
when returning from a system call we need to handle the return value
differently depending on the instruction we used to enter the kernel.
For syscalls implemented in ASM, entry and exit are implemented by
different macros (PSEUDO and PSEUDO_RET, resp.), which may be used in
sequence (e.g. for templated syscalls) or with other instructions in
between (e.g. clone). To avoid accessing the TCB a second time on
PSEUDO_RET to check which instruction we used, the value read from
hwcap2 is cached on a non-volatile register.
This is not needed when using INTERNAL_SYSCALL macro, since entry and
exit are bundled into the same inline asm directive.
The dynamic loader may issue syscalls before the TCB has been setup
so it always uses sc with no extra checks. For the static case, there
is no compile-time way to determine if we are inside startup code,
so we also check the value of the thread pointer before effectively
accessing the TCB. For such situations in which the availability of
scv cannot be determined, sc is always used.
Support for scv in syscalls implemented in their own ASM file (clone and
vfork) will be added later. For now simply use sc as before.
Average performance over 1M calls for each syscall "type":
- stat: C wrapper calling INTERNAL_SYSCALL
- getpid: templated ASM syscall
- syscall: call to gettid using syscall function
Standard:
stat : 1.573445 us / ~3619 cycles
getpid : 0.164986 us / ~379 cycles
syscall : 0.162743 us / ~374 cycles
With scv:
stat : 1.537049 us / ~3535 cycles <~ -84 cycles / -2.32%
getpid : 0.109923 us / ~253 cycles <~ -126 cycles / -33.25%
syscall : 0.116410 us / ~268 cycles <~ -106 cycles / -28.34%
Tested on powerpc, powerpc64, powerpc64le (with and without scv)
Tested-by: Lucas A. M. Magalhães <lamm@linux.ibm.com>
Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
Adhemerval Zanella [Tue, 29 Dec 2020 20:12:21 +0000 (17:12 -0300)]
malloc: preserve errno on mcheck hooks [BZ #17924]
Similar to the fix
69fda43b8d, save and restore errno for the hook
functions used for MALLOC_CHECK_=3.
It fixes the malloc/tst-free-errno-mcheck regression.
Checked on x86_64-linux-gnu.
Siddhesh Poyarekar [Thu, 24 Dec 2020 02:44:20 +0000 (08:14 +0530)]
x86 long double: Add tests for pseudo normal numbers
Add some tests for fpclassify, isnan, isinf and issignaling.
Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Siddhesh Poyarekar [Thu, 24 Dec 2020 02:27:25 +0000 (07:57 +0530)]
x86 long double: Consider pseudo numbers as signaling
Add support to treat pseudo-numbers specially and implement x86
version to consider all of them as signaling.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Adhemerval Zanella [Mon, 26 Oct 2020 11:58:01 +0000 (08:58 -0300)]
io: Remove xmknod{at} implementations
With xmknod wrapper functions removed (
589260cef8), the mknod functions
are now properly exported, and version is done using symbols versioning
instead of the extra _MKNOD_* argument.
It also allows us to consolidate Linux and Hurd mknod implementation.
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Adhemerval Zanella [Fri, 23 Oct 2020 19:40:06 +0000 (16:40 -0300)]
io: Remove xstat implementations
With xstat wrapper functions removed (
8ed005daf0), the stat functions
are now properly exported, and version is done using symbols versioning
instead of the extra _STAT_* argument.
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Paul Eggert [Tue, 29 Dec 2020 08:45:49 +0000 (00:45 -0800)]
free: preserve errno [BZ#17924]
In the next release of POSIX, free must preserve errno
<https://www.austingroupbugs.net/view.php?id=385>.
Modify __libc_free to save and restore errno, so that
any internal munmap etc. syscalls do not disturb the caller's errno.
Add a test malloc/tst-free-errno.c (almost all by Bruno Haible),
and document that free preserves errno.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Samuel Thibault [Tue, 29 Dec 2020 02:26:12 +0000 (03:26 +0100)]
hurd: Accept including hurd/version.h
We need it to get the RPC API version.
Samuel Thibault [Mon, 28 Dec 2020 22:37:04 +0000 (23:37 +0100)]
hurd: Add WSTOPPED/WCONTINUED/WEXITED/WNOWAIT support [BZ #23091]
The new __proc_waitid RPC now expects WEXITED to be passed, allowing to
properly implement waitid, and thus define the missing W* macros
(according to FreeBSD values).
Samuel Thibault [Mon, 28 Dec 2020 22:05:14 +0000 (23:05 +0100)]
support: Make support_process_state_wait wait less
Tests such as posix/tst-waitid.c make heavy use of
support_process_state_wait, and thus on non-Linux where it falls back
to sleeping, a 2s sleep makes such test time out, while 1s remains
fine enough.
Samuel Thibault [Sat, 26 Dec 2020 16:57:52 +0000 (17:57 +0100)]
hurd: set sigaction for signal preemptors in arch-independent file
Instead of having the arch-specific trampoline setup code detect whether
preemption happened or not, we'd rather pass it the sigaction. In the
future, this may also allow to change sa_flags from post_signal().
Samuel Thibault [Sat, 26 Dec 2020 15:39:40 +0000 (16:39 +0100)]
hurd: Fix spawni SPAWN_XFLAGS_TRY_SHELL with empty argv
When argv is empty, we need to add the original script to be run on the
shell command line.
Samuel Thibault [Sat, 26 Dec 2020 14:12:04 +0000 (15:12 +0100)]
hurd: Try shell in posix_spawn* only in compat mode
Reported by Bruno Haible <bruno@clisp.org>
H.J. Lu [Thu, 24 Dec 2020 23:43:34 +0000 (15:43 -0800)]
Remove _ISOMAC check from <cpu-features.h>
Remove _ISOMAC check from <cpu-features.h> since it isn't an installer
header file.
H.J. Lu [Thu, 24 Dec 2020 02:34:34 +0000 (18:34 -0800)]
x86: Remove the duplicated CPU_FEATURE_CPU_P
CPU_FEATURE_CPU_P is defined in sysdeps/x86/sys/platform/x86.h. Remove
the duplicated CPU_FEATURE_CPU_P in sysdeps/x86/include/cpu-features.h.
Siddhesh Poyarekar [Tue, 15 Dec 2020 10:36:48 +0000 (16:06 +0530)]
Partially revert
681900d29683722b1cb0a8e565a0585846ec5a61
Do not attempt to fix the significand top bit in long double input
received in printf. The code should never reach here because isnan
should now detect unnormals as NaN. This is already a NOP for glibc
since it uses the gcc __builtin_isnan, which detects unnormals as NaN.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
Siddhesh Poyarekar [Wed, 23 Dec 2020 08:32:02 +0000 (14:02 +0530)]
x86 long double: Support pseudo numbers in isnanl
This syncs up isnanl behaviour with gcc. Also move the isnanl
implementation to sysdeps/x86 and remove the sysdeps/x86_64 version.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Siddhesh Poyarekar [Wed, 23 Dec 2020 08:23:34 +0000 (13:53 +0530)]
x86 long double: Support pseudo numbers in fpclassifyl
Also move sysdeps/i386/fpu/s_fpclassifyl.c to
sysdeps/x86/fpu/s_fpclassifyl.c and remove
sysdeps/x86_64/fpu/s_fpclassifyl.c
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Siddhesh Poyarekar [Wed, 23 Dec 2020 02:11:17 +0000 (07:41 +0530)]
MTE: Do not pad size in realloc_check
The MTE patch to add malloc support incorrectly padded the size passed
to _int_realloc by SIZE_SZ when it ought to have sent just the
chunksize. Revert that bit of the change so that realloc works
correctly with MALLOC_CHECK_ set.
This also brings the realloc_check implementation back in sync with
libc_realloc.
Siddhesh Poyarekar [Wed, 23 Dec 2020 07:34:45 +0000 (13:04 +0530)]
tests-mcheck: New variable to run tests with MALLOC_CHECK_=3
This new variable allows various subsystems in glibc to run all or
some of their tests with MALLOC_CHECK_=3. This patch adds
infrastructure support for this variable as well as an implementation
in malloc/Makefile to allow running some of the tests with
MALLOC_CHECK_=3.
At present some tests in malloc/ have been excluded from the mcheck
tests either because they're specifically testing MALLOC_CHECK_ or
they are failing in master even without the Memory Tagging patches
that prompted this work. Some tests were reviewed and found to need
specific error points that MALLOC_CHECK_ defeats by terminating early
but a thorough review of all tests is needed to bring them into mcheck
coverage.
The following failures are seen in current master:
FAIL: malloc/tst-malloc-fork-deadlock-mcheck
FAIL: malloc/tst-malloc-stats-cancellation-mcheck
FAIL: malloc/tst-malloc-thread-fail-mcheck
FAIL: malloc/tst-realloc-mcheck
FAIL: malloc/tst-reallocarray-mcheck
All of these are due to the Memory Tagging patchset and will be fixed
separately.
Florian Weimer [Wed, 23 Dec 2020 11:07:20 +0000 (12:07 +0100)]
elf: Account for glibc-hwcaps/ prefix in _dl_important_hwcaps
Siddhesh Poyarekar [Wed, 23 Dec 2020 01:33:42 +0000 (07:03 +0530)]
misc: Use __ferror_unlocked instead of ferror
The ferror results in an unnecessary PLT reference. Use
__ferror_unlocked instead , which gets inlined.
Florian Weimer [Tue, 22 Dec 2020 18:20:56 +0000 (19:20 +0100)]
s390x: Regenerate ulps
For new inputs added in commit
cad5ad81d2f7f58a7ad0d8afa8c1b710,
as seen on a z13 system.
Florian Weimer [Tue, 22 Dec 2020 18:20:56 +0000 (19:20 +0100)]
powerpc: Regenerate ulps
For new inputs added in commit
cad5ad81d2f7f58a7ad0d8afa8c1b710,
as seen on a POWER8 system.
Siddhesh Poyarekar [Tue, 22 Dec 2020 11:48:12 +0000 (17:18 +0530)]
addmntent: Remove unbounded alloca usage from getmntent [BZ#27083]
The addmntent function replicates elements of struct mnt on stack
using alloca, which is unsafe. Put characters directly into the
stream, escaping them as they're being written out.
Also add a test to check all escaped characters with addmntent and
getmntent.
H.J. Lu [Tue, 22 Dec 2020 03:56:10 +0000 (19:56 -0800)]
<sys/platform/x86.h>: Add Intel LAM support
Add Intel Linear Address Masking (LAM) support to <sys/platform/x86.h>.
HAS_CPU_FEATURE (LAM) can be used to detect if LAM is enabled in CPU.
LAM modifies the checking that is applied to 64-bit linear addresses,
allowing software to use of the untranslated address bits for metadata.
Florian Weimer [Mon, 21 Dec 2020 17:17:54 +0000 (18:17 +0100)]
i386: Regenerate ulps
For new inputs added in commit
cad5ad81d2f7f58a7ad0d8afa8c1b710.
Szabolcs Nagy [Mon, 21 Dec 2020 16:39:20 +0000 (16:39 +0000)]
aarch64: update ulps.
For new test cases in
commit
cad5ad81d2f7f58a7ad0d8afa8c1b7101a0301fb
Richard Earnshaw [Mon, 21 Dec 2020 15:03:03 +0000 (15:03 +0000)]
aarch64: Add aarch64-specific files for memory tagging support
This final patch provides the architecture-specific implementation of
the memory-tagging support hooks for aarch64.