| Commit message (Collapse) | Author | Age | Files | Lines |
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Running build-many-glibcs.py with Python 3.12 or later produces a
warning:
build-many-glibcs.py:566: DeprecationWarning: datetime.datetime.utcnow() is deprecated and scheduled for removal in a future version. Use timezone-aware objects to represent datetimes in UTC: datetime.datetime.now(datetime.UTC).
build_time = datetime.datetime.utcnow()
Replace with datetime.datetime.now(datetime.timezone.utc) (the
datetime.UTC constant is new in 3.11, so not suitable for use in this
script at present).
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Running build-many-glibcs.py with Python 3.12 or later produces a
warning:
build-many-glibcs.py:173: SyntaxWarning: invalid escape sequence '\.'
m = re.fullmatch('([0-9]+)\.([0-9]+)[.0-9]*', l)
Use a raw string instead to avoid that warning. (Note: I haven't
checked whether any other Python scripts included with glibc might
have issues with newer Python versions.)
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The feupdateenv tests added by 802aef27b2 do not restore the floating
point mask, which might keep some floating point exception enabled and
thus make the feupdateenv_single_test raise an unexpected signal.
Checked on x86_64-linux-gnu and aarch64-linux-gnu (on Apple M1 trapping
is supported).
Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
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On x86-64 machine with
[hjl@gnu-cfl-3 x86-glibc]$ ls -l /usr/include/asm/prctl.h sysdeps/unix/sysv/linux/x86_64/include/asm/prctl.h
-rw-r--r-- 1 hjl hjl 825 Jan 9 09:41 sysdeps/unix/sysv/linux/x86_64/include/asm/prctl.h
-rw-r--r-- 1 root root 1170 Nov 27 16:00 /usr/include/asm/prctl.h
[hjl@gnu-cfl-3 x86-glibc]$
glibc configured with --enable-cet build failed:
make[2]: Entering directory '/export/gnu/import/git/gitlab/x86-glibc/iconv'
../Makerules:327: update target
'/export/build/gnu/tools-build/glibc-cet-gitlab/build-x86_64-linux/gnu/lib-names-64.h'
due to: /export/build/gnu/tools-build/glibc-cet-gitlab/build-x86_64-linux/gnu/lib-names-64.stmp
:
../Makeconfig:1216: update target
'/export/build/gnu/tools-build/glibc-cet-gitlab/build-x86_64-linux/libc-modules.h'
due to: /export/build/gnu/tools-build/glibc-cet-gitlab/build-x86_64-linux/libc-modules.stmp
:
../Makerules:1126: update target '/usr/include/asm/prctl.h' due to:
../sysdeps/unix/sysv/linux/x86_64/64/../include/asm/prctl.h
force-install
/usr/bin/install -c -m 644
../sysdeps/unix/sysv/linux/x86_64/64/../include/asm/prctl.h
/usr/include/asm/prctl.h
/usr/bin/install: cannot remove '/usr/include/asm/prctl.h': Permission denied
make[2]: *** [../Makerules:1126: /usr/include/asm/prctl.h] Error 1
make[2]: Leaving directory '/export/gnu/import/git/gitlab/x86-glibc/iconv'
make[1]: *** [Makefile:484: iconv/subdir_lib] Error 2
make[1]: Leaving directory '/export/gnu/import/git/gitlab/x86-glibc'
make: *** [Makefile:9: all] Error 2
This is triggered by the rule in Makerules:
$(inst_includedir)/%.h: $(..)include/%.h $(+force)
$(do-install)
Since no files under include/ should be installed, remove it from
Makerules.
Tested it on x86-64. There are no differences in the installed header
files.
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Since it is only supported for x86_64.
Checked on i686-linux-gnu.
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CET is only support for x86_64, this patch reverts:
- faaee1f07ed x86: Support shadow stack pointer in setjmp/longjmp.
- be9ccd27c09 i386: Add _CET_ENDBR to indirect jump targets in
add_n.S/sub_n.S
- c02695d7764 x86/CET: Update vfork to prevent child return
- 5d844e1b725 i386: Enable CET support in ucontext functions
- 124bcde683 x86: Add _CET_ENDBR to functions in crti.S
- 562837c002 x86: Add _CET_ENDBR to functions in dl-tlsdesc.S
- f753fa7dea x86: Support IBT and SHSTK in Intel CET [BZ #21598]
- 825b58f3fb i386-mcount.S: Add _CET_ENDBR to _mcount and __fentry__
- 7e119cd582 i386: Use _CET_NOTRACK in i686/memcmp.S
- 177824e232 i386: Use _CET_NOTRACK in memcmp-sse4.S
- 0a899af097 i386: Use _CET_NOTRACK in memcpy-ssse3-rep.S
- 7fb613361c i386: Use _CET_NOTRACK in memcpy-ssse3.S
- 77a8ae0948 i386: Use _CET_NOTRACK in memset-sse2-rep.S
- 00e7b76a8f i386: Use _CET_NOTRACK in memset-sse2.S
- 90d15dc577 i386: Use _CET_NOTRACK in strcat-sse2.S
- f1574581c7 i386: Use _CET_NOTRACK in strcpy-sse2.S
- 4031d7484a i386/sub_n.S: Add a missing _CET_ENDBR to indirect jump
- target
-
Checked on i686-linux-gnu.
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The CET is only supported for x86_64 and there is no plan to add
kernel support for i386. Move the Makefile rules and files from the
generic x86 folder to x86_64 one.
Checked on x86_64-linux-gnu and i686-linux-gnu.
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Resolves: BZ # 27312
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Resolves: BZ # 12908
https://iso639-3.sil.org/code/zgh
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See: https://sourceware.org/bugzilla/show_bug.cgi?id=31221#c2
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Resolves: BZ # 31221
glibc can recognise its code, but does not have its data.
This patch remedies that.
Signed-off-by: Janet Blackquill <uhhadd@gmail.com>
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Linux 6.7 removed ia64 from the official tree [1], following the general
principle that a glibc port needs upstream support for the architecture
in all the components it depends on (binutils, GCC, and the Linux
kernel).
Apart from the removal of sysdeps/ia64 and sysdeps/unix/sysv/linux/ia64,
there are updates to various comments referencing ia64 for which removal
of those references seemed appropriate. The configuration is removed
from README and build-many-glibcs.py.
The CONTRIBUTED-BY, elf/elf.h, manual/contrib.texi (the porting
mention), *.po files, config.guess, and longlong.h are not changed.
For Linux it allows cleanup some clone2 support on multiple files.
The following bug can be closed as WONTFIX: BZ 22634 [2], BZ 14250 [3],
BZ 21634 [4], BZ 10163 [5], BZ 16401 [6], and BZ 11585 [7].
[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=43ff221426d33db909f7159fdf620c3b052e2d1c
[2] https://sourceware.org/bugzilla/show_bug.cgi?id=22634
[3] https://sourceware.org/bugzilla/show_bug.cgi?id=14250
[4] https://sourceware.org/bugzilla/show_bug.cgi?id=21634
[5] https://sourceware.org/bugzilla/show_bug.cgi?id=10163
[6] https://sourceware.org/bugzilla/show_bug.cgi?id=16401
[7] https://sourceware.org/bugzilla/show_bug.cgi?id=11585
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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Resolves: BZ # 31086
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Resolves: BZ # 31086
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Resolves: BZ # 31086
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Resolves: BZ # 31086
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Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
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PLT rewrite calculated displacement with
ElfW(Addr) disp = value - branch_start - JMP32_INSN_SIZE;
On x32, displacement from 0xf7fbe060 to 0x401030 was calculated as
unsigned int disp = 0x401030 - 0xf7fbe060 - 5;
with disp == 0x8442fcb and caused displacement overflow. The PLT entry
was changed to:
0xf7fbe060 <+0>: e9 cb 2f 44 08 jmp 0x401030
0xf7fbe065 <+5>: cc int3
0xf7fbe066 <+6>: cc int3
0xf7fbe067 <+7>: cc int3
0xf7fbe068 <+8>: cc int3
0xf7fbe069 <+9>: cc int3
0xf7fbe06a <+10>: cc int3
0xf7fbe06b <+11>: cc int3
0xf7fbe06c <+12>: cc int3
0xf7fbe06d <+13>: cc int3
0xf7fbe06e <+14>: cc int3
0xf7fbe06f <+15>: cc int3
x32 has 32-bit address range, but it doesn't wrap address around at 4GB,
JMP target was changed to 0x100401030 (0xf7fbe060LL + 0x8442fcbLL + 5),
which is above 4GB.
Always use uint64_t to calculate displacement. This fixes BZ #31218.
Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
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Replace a stray `nop` with a `.p2align` directive.
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With clang 14 and also with main the tst-stdbit-Wconversion
issues the warnings:
../stdlib/stdbit.h:701:40: error: implicit conversion loses integer
precision: 'int' to 'uint16_t' (aka 'unsigned short')
[-Werror,-Wimplicit-int-conversion]
return __x == 0 ? 0 : ((uint16_t) 1) << (__bw16_inline (__x) - 1);
~~~~~~ ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
../stdlib/stdbit.h:707:39: error: implicit conversion loses integer
precision: 'int' to 'uint8_t' (aka 'unsigned char')
[-Werror,-Wimplicit-int-conversion]
return __x == 0 ? 0 : ((uint8_t) 1) << (__bw8_inline (__x) - 1);
~~~~~~ ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
../stdlib/stdbit.h:751:40: error: implicit conversion loses integer
precision: 'int' to 'uint16_t' (aka 'unsigned short')
[-Werror,-Wimplicit-int-conversion]
return __x <= 1 ? 1 : ((uint16_t) 2) << (__bw16_inline (__x - 1) - 1);
~~~~~~ ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../stdlib/stdbit.h:757:39: error: implicit conversion loses integer
precision: 'int' to 'uint8_t' (aka 'unsigned char')
[-Werror,-Wimplicit-int-conversion]
return __x <= 1 ? 1 : ((uint8_t) 2) << (__bw8_inline (__x - 1) - 1);
~~~~~~ ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tst-stdbit-Wconversion.c:45:31: error: implicit conversion loses integer
precision: 'unsigned short' to 'uint8_t' (aka 'unsigned char')
[-Werror,-Wimplicit-int-conversion]
(void) stdc_trailing_zeros (us);
~~~~~~~~~~~~~~~~~~~~~^~~
../stdlib/stdbit.h:164:30: note: expanded from macro
'stdc_trailing_zeros'
: stdc_trailing_zeros_uc (x))
~~~~~~~~~~~~~~~~~~~~~~~~^~
../stdlib/stdbit.h:191:52: note: expanded from macro
'stdc_trailing_zeros_uc'
# define stdc_trailing_zeros_uc(x) (__ctz8_inline (x))
~~~~~~~~~~~~~ ^
tst-stdbit-Wconversion.c:46:31: error: implicit conversion loses integer
precision: 'unsigned int' to 'uint16_t' (aka 'unsigned short')
[-Werror,-Wimplicit-int-conversion]
(void) stdc_trailing_zeros (ui);
~~~~~~~~~~~~~~~~~~~~~^~~
../stdlib/stdbit.h:163:48: note: expanded from macro
'stdc_trailing_zeros'
: sizeof (x) == 2 ? stdc_trailing_zeros_us (x) \
~~~~~~~~~~~~~~~~~~~~~~~~^~
../stdlib/stdbit.h:192:53: note: expanded from macro
'stdc_trailing_zeros_us'
# define stdc_trailing_zeros_us(x) (__ctz16_inline (x))
~~~~~~~~~~~~~~ ^
tst-stdbit-Wconversion.c:46:31: error: implicit conversion loses integer
precision: 'unsigned int' to 'uint8_t' (aka 'unsigned char')
[-Werror,-Wimplicit-int-conversion]
(void) stdc_trailing_zeros (ui);
~~~~~~~~~~~~~~~~~~~~~^~~
../stdlib/stdbit.h:164:30: note: expanded from macro
'stdc_trailing_zeros'
: stdc_trailing_zeros_uc (x))
~~~~~~~~~~~~~~~~~~~~~~~~^~
../stdlib/stdbit.h:191:52: note: expanded from macro
'stdc_trailing_zeros_uc'
# define stdc_trailing_zeros_uc(x) (__ctz8_inline (x))
~~~~~~~~~~~~~ ^
tst-stdbit-Wconversion.c:47:31: error: implicit conversion loses integer
precision: 'unsigned long' to 'uint16_t' (aka 'unsigned short')
[-Werror,-Wimplicit-int-conversion]
(void) stdc_trailing_zeros (ul);
~~~~~~~~~~~~~~~~~~~~~^~~
../stdlib/stdbit.h:163:48: note: expanded from macro
'stdc_trailing_zeros'
: sizeof (x) == 2 ? stdc_trailing_zeros_us (x) \
~~~~~~~~~~~~~~~~~~~~~~~~^~
../stdlib/stdbit.h:192:53: note: expanded from macro
'stdc_trailing_zeros_us'
# define stdc_trailing_zeros_us(x) (__ctz16_inline (x))
~~~~~~~~~~~~~~ ^
[...]
It seems to boiler down to __builtin_clz not having a variant for 8 or
16 bits. Fix it by explicit casting to the expected types. Although
not strickly required for older gcc, using the same __pacify macro
simpify the required code.
Checked on x86_64-linux-gnu and i686-linux-gnu.
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With gcc 6.5.0, 7.5.0, 8.5.0, and 9.5.0 the tst-stdbit-Wconversion
issues the warnings:
../stdlib/stdbit.h: In function ‘__clo16_inline’:
../stdlib/stdbit.h:128:26: error: conversion to ‘uint16_t {aka short
unsigned int}’ from ‘int’ may alter its value [-Werror=conversion]
return __clz16_inline (~__x);
^
../stdlib/stdbit.h: In function ‘__clo8_inline’:
../stdlib/stdbit.h:134:25: error: conversion to ‘uint8_t {aka unsigned
char}’ from ‘int’ may alter its value [-Werror=conversion]
return __clz8_inline (~__x);
^
../stdlib/stdbit.h: In function ‘__cto16_inline’:
../stdlib/stdbit.h:232:26: error: conversion to ‘uint16_t {aka short
unsigned int}’ from ‘int’ may alter its value [-Werror=conversion]
return __ctz16_inline (~__x);
^
../stdlib/stdbit.h: In function ‘__cto8_inline’:
../stdlib/stdbit.h:238:25: error: conversion to ‘uint8_t {aka unsigned
char}’ from ‘int’ may alter its value [-Werror=conversion]
return __ctz8_inline (~__x);
^
../stdlib/stdbit.h: In function ‘__bf16_inline’:
../stdlib/stdbit.h:701:23: error: conversion to ‘uint16_t {aka short
unsigned int}’ from ‘int’ may alter its value [-Werror=conversion]
return __x == 0 ? 0 : ((uint16_t) 1) << (__bw16_inline (__x) - 1);
~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../stdlib/stdbit.h: In function ‘__bf8_inline’:
../stdlib/stdbit.h:707:23: error: conversion to ‘uint8_t {aka unsigned
char}’ from ‘int’ may alter its value [-Werror=conversion]
return __x == 0 ? 0 : ((uint8_t) 1) << (__bw8_inline (__x) - 1);
~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../stdlib/stdbit.h: In function ‘__bc16_inline’:
../stdlib/stdbit.h:751:59: error: conversion to ‘uint16_t {aka short
unsigned int}’ from ‘int’ may alter its value [-Werror=conversion]
return __x <= 1 ? 1 : ((uint16_t) 2) << (__bw16_inline (__x - 1) -
1);
^~~
../stdlib/stdbit.h:751:23: error: conversion to ‘uint16_t {aka short
unsigned int}’ from ‘int’ may alter its value [-Werror=conversion]
return __x <= 1 ? 1 : ((uint16_t) 2) << (__bw16_inline (__x - 1) -
1);
~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../stdlib/stdbit.h: In function ‘__bc8_inline’:
../stdlib/stdbit.h:757:57: error: conversion to ‘uint8_t {aka unsigned
char}’ from ‘int’ may alter its value [-Werror=conversion]
return __x <= 1 ? 1 : ((uint8_t) 2) << (__bw8_inline (__x - 1) - 1);
^~~
../stdlib/stdbit.h:757:23: error: conversion to ‘uint8_t {aka unsigned
char}’ from ‘int’ may alter its value [-Werror=conversion]
return __x <= 1 ? 1 : ((uint8_t) 2) << (__bw8_inline (__x - 1) - 1);
It seems to boiler down to __builtin_clz not having a variant for 8 or
16 bits. Fix it by explicit casting to the expected types.
Checked on x86_64-linux-gnu and i686-linux-gnu with gcc 9.5.0.
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Add ELF_DYNAMIC_AFTER_RELOC to allow target specific processing after
relocation.
For x86-64, add
#define DT_X86_64_PLT (DT_LOPROC + 0)
#define DT_X86_64_PLTSZ (DT_LOPROC + 1)
#define DT_X86_64_PLTENT (DT_LOPROC + 3)
1. DT_X86_64_PLT: The address of the procedure linkage table.
2. DT_X86_64_PLTSZ: The total size, in bytes, of the procedure linkage
table.
3. DT_X86_64_PLTENT: The size, in bytes, of a procedure linkage table
entry.
With the r_addend field of the R_X86_64_JUMP_SLOT relocation set to the
memory offset of the indirect branch instruction.
Define ELF_DYNAMIC_AFTER_RELOC for x86-64 to rewrite the PLT section
with direct branch after relocation when the lazy binding is disabled.
PLT rewrite is disabled by default since SELinux may disallow modifying
code pages and ld.so can't detect it in all cases. Use
$ export GLIBC_TUNABLES=glibc.cpu.plt_rewrite=1
to enable PLT rewrite with 32-bit direct jump at run-time or
$ export GLIBC_TUNABLES=glibc.cpu.plt_rewrite=2
to enable PLT rewrite with 32-bit direct jump and on APX processors with
64-bit absolute jump at run-time.
Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
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These describe generic AArch64 CPU features, and are not tied to a
kernel-specific way of determining them. We can share them between
the Linux and Hurd AArch64 ports.
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-ID: <20240103171502.1358371-13-bugaevc@gmail.com>
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We fetch __vm_page_size as the very first RPC that we do, inside
__mach_init (). Propagate that to _dl_pagesize ASAP after that,
before any other initialization.
In dynamic builds, this is already done immediately after
__mach_init (), inside _dl_sysdep_start ().
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-ID: <20240103171502.1358371-12-bugaevc@gmail.com>
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This is the case on both x86 architectures, but not on AArch64.
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-ID: <20240103171502.1358371-11-bugaevc@gmail.com>
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This will make it usable in other ports.
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-ID: <20240103171502.1358371-10-bugaevc@gmail.com>
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We already have the RETURN_TO macro for this exact use case, and it's already
used in the non-static code path. Use it here too.
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-ID: <20240103171502.1358371-9-bugaevc@gmail.com>
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Instead of relying on the stack frame layout to figure out where the stack
pointer was prior to the _hurd_stack_setup () call, just pass the pointer
as an argument explicitly. This is less brittle and much more portable.
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-ID: <20240103171502.1358371-8-bugaevc@gmail.com>
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setcontext and swapcontext put a restore token on the old shadow stack
which is used to restore the target shadow stack when switching user
contexts. When longjmp from a user context, the target shadow stack
can be different from the current shadow stack and INCSSP can't be
used to restore the shadow stack pointer to the target shadow stack.
Update longjmp to search for a restore token. If found, use the token
to restore the shadow stack pointer before using INCSSP to pop the
shadow stack. Stop the token search and use INCSSP if the shadow stack
entry value is the same as the current shadow stack pointer.
It is a user error if there is a shadow stack switch without leaving a
restore token on the old shadow stack.
The only difference between __longjmp.S and __longjmp_chk.S is that
__longjmp_chk.S has a check for invalid longjmp usages. Merge
__longjmp.S and __longjmp_chk.S by adding the CHECK_INVALID_LONGJMP
macro.
Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
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Since shadow stack is only supported for x86-64, ignore --enable-cet for
i386. Always setting $(enable-cet) for i386 to "no" to support
ifneq ($(enable-cet),no)
in x86 Makefiles. We can't use
ifeq ($(enable-cet),yes)
since $(enable-cet) can be "yes", "no" or "permissive".
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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We're obtaining arguments from the stack differently, see init-first.c.
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
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Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
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These symbols are internal and never exported; make sure the compiler
realizes that when compiling hurdsig.c and does not try to emit GOT
reads.
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
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Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
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code "fy"
Resolves: BZ # 14522
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Resolves: BZ # 27601
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