Cygwin's default locale is "C.UTF-8" as far as LC_CTYPE settings
are concerned. However, while __global_locale contains fixed
mbtowc and wctomb pointers, the lc_ctype_T pointer is still pointing
to _C_ctype_locale, representing the standard "C" locale.
The problem with this is that the codeset name as well as MB_CUR_MAX
is wrong.
Fix this by introducing a new lc_ctype_T structure called
_C_utf8_ctype_locale, setting the default codeset to "UTF-8" and
MB_CUR_MAX to 6. Use this as lc_ctype_T pointer in __global_locale
by default on Cygwin.
fetch_account_from_windows shortcuts the current user in that
it takes the user's domain SID and just adds the matching RID
from the token's primary group to create a group SID.
How wrong this is can be very simply reproduced:
Assuming you run a native process, like cmd, with primary group
set to the Administrators builtin group. Run Cygwin's id(1) as
child process. id(1) will print a non-existent group as primary
group and also add it to the group list.
This can only be avoided by not special casing the current user
and thus not creating a group SID from partial information.
Fixes: 6cc7c925ce86 ("(pwdgrp::fetch_account_from_windows): Default primary group for the
current user to primary group from user token.") Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
internal_getlogin overwrites the process token primary group if it
differs from the primary group as stored in the passwd DB.
However, this also overwrites the primary group of the process if
it has been deliberately changed by a former process (e. g., newgrp),
and the current process has a non-Cygwin process as parent.
Our docs claim we restrict overwriting the primary group to local,
non-domain user accounts anyway, and it was actually meant this way.
So check for exactly that before overwriting the primary group
in the token: It's only allowed if the user is a local account
and the primary group in the token is still the default group
"None".
Fixes: 6cc7c925ce861 ("(internal_getlogin): Give primary group
from user token more weight.") Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Cygwin: uinfo: Drop long disabled nss_prefix and nss_separator
Originally the code was written to allow three ways of prefixing
accounts and to freely define a domain/account separator. This code
has been disabled even before being officially released, and it was
never re-enabled. Given there has been no complaints for eight years
now, drop this code eventually. Just add a macro to define the
domain/account separator statically.
Cygwin: exec: don't access cygheap before it's initialized
This is a long-standing thinko.
When you exec a process, dll_crt0_0 in the child process calls
child_info_spawn::handle_spawn(). handle_spawn() initialises the
cygheap.
Now consider calling strace. Strace is a non-Cygwin process dynamically
loading cygwin1.dll via LoadLibrary. This in turn initializes the DLL:
- dll_crt0_0 finds that the process it attaches to has been exec'd, so
child_info_spawn::handle_spawn() is called.
- If the DLL is being dynamically loaded, handle_spawn() calls
child_info_spawn::get_parent_handle(). This in turn tries to set
the moreinfo->myself_pinfo value inside the cygheap to NULL.
- However, at this time, the cygheap has not yet been initialized. This
only occurs in the cygheap_fixup_in_child() call after get_parent_handle()
returns.
--> SEGV
This thinko never had a negative side effect, because the cygheap was
pre-allocated at DLL load time until commit 2f9b8ff00cce ("Cygwin:
decouple cygheap from Cygwin DLL"). With 2f9b8ff00cce, the cygheap
actually doesn't exist until after the call to cygheap_fixup_in_child().
Fix this problem by moving the assignment after the call to
cygheap_fixup_in_child().
Cygwin: multiple_cygwin_problem: drop obsolete check for "cygheap"
After decoupling cygheap from the DLL loading address, the check
for a different _cygheap_start has gone. So the matching string
check in multiple_cygwin_problem is obsolete now.
Carlo Bramini [Tue, 29 Nov 2022 09:02:43 +0000 (10:02 +0100)]
Cygwin: serial: Fix a copy-paste error in DTR setup
In commit 2dab880c963ce0204c3513d664f610b587a3e6a6 I did a mistake when
I copied the new fhandler_serial::switch_modem_lines() from my modified
3.3.6 branch to the current master and I left a copy paste error. This
patch fixes that error.
Fixes: 2dab880c963c ("Cygwin: fix TIOCMBIS/TIOCMBIC not working when using usbser.sys")
Takashi Yano [Wed, 23 Nov 2022 23:30:16 +0000 (08:30 +0900)]
Cygwin: pty: Rename fhandler/tty.cc to fhandler/pty.cc.
- Previously, we have two tty.cc, one is winsup/cygwin/tty.cc and
the other is winsup/cygwin/fhandler/tty.cc. This is somewhat
confusing. This patch renames fhandler/tty.cc to fhandler/pty.cc.
Corinna Vinschen [Thu, 24 Nov 2022 11:23:09 +0000 (12:23 +0100)]
Cygwin: uname: allow to specify external release info
When creating regular Cygwin test releases we need a way to
automate unambiguous version information based on the output
of `git describe'. Allow to inject a release string via a
preprocessor macro CYGPORT__RELEASE_INFO. Change the default
release info to recognize a local, non-distro build.
Tobias Burnus [Tue, 22 Nov 2022 13:53:48 +0000 (14:53 +0100)]
amdgcn: Use __builtin_gcn_ in libc/machine/amdgcn/getreent.c
Call __builtin_gcn_get_stack_limit and __builtin_gcn_first_call_this_thread_p
to reduce dependency on some register/layout assumptions by using the new
GCC mainline (GCC 13) builtins, if they are available. If not, the existing
code is used.
Tobias Burnus [Fri, 18 Nov 2022 08:50:20 +0000 (09:50 +0100)]
amdgcn: Replace asm("s8") by __builtin_gcn_kernarg_ptr if existing
Check whether __builtin_gcn_kernarg_ptr is available and, if it is,
call it instead using the hard-coded 'asm("s8")' in:
* newlib/libc/machine/amdgcn/exit-value.h (exit_with_int)
* newlib/libc/machine/amdgcn/mlock.c (sbrk)
* newlib/libc/sys/amdgcn/write.c (write)
Takashi Yano [Sat, 19 Nov 2022 08:28:15 +0000 (17:28 +0900)]
Cygwin: pty, console: Encapsulate spawn.cc code related to pty/console.
- The codes related to pty and console in spawn.cc have been moved
into the new class fhandler_termios::spawn_worker, and make spawn.cc
call them. The functionality has not been changed at all.
Jon Turney [Sat, 29 Oct 2022 15:43:50 +0000 (16:43 +0100)]
makedocbook: Fix false report of unhandled texinfo command
During 'make man', makedocbook falsely reports "texinfo command
'@modifier' remains in output" while processing the setlocal(3) manpage,
which contains that literal string.
Move the check for unrecognized texinfo commands to before processing
'@@' (an escaped '@') in the texinfo source, and teach it to ignore
them.
Improve that check slightly, so it catches non-alphabetic texinfo
commands, of which there are few.
Now we don't have false positives, we can make unrecognized texinfo
commands fatal to manpage generation, rather than leaving them verbatim
in the generated manpage.
Carlo Bramini [Fri, 11 Nov 2022 10:15:27 +0000 (11:15 +0100)]
Cygwin: fix TIOCMBIS/TIOCMBIC not working when using usbser.sys
In winsup/cygwin/fhandler/serial.cc, the function
fhandler_serial::switch_modem_lines() is called when TIOCMBIS/TIOCMBIC
are used in an ioctl() call.
This function uses EscapeCommFunction() for setting and resetting RTS
and DTR signals of a serial port. Unfortunately, this function does not
work on USB CDC devices.
This is not a true bug of CYGWIN but an issue of the usbser.sys driver,
from Windows 2000 to the latest Windows 11. Both 32bit and 64bit
versions of the operating system are affected. Actually, I tested
EscapeCommFunction() also when using a real UART, based on the
traditional 16550 driver and it works fine. Using thirdy party CDC
drivers, like the one provided by FTDI for their USB bridge chips,
probably also works.
However, it is also possible to drive the RTS/DTR signals by writing
their state with SetCommState(), which proved to be working fine all
types of connection. This is also a better solution for handling these
signals since RTS/DTR can be set at the same time rather than having two
separate calls with a visible delay between them.
Andy Koppe [Wed, 9 Nov 2022 20:34:30 +0000 (20:34 +0000)]
Cygwin: Correct /proc/*/stat for processes without ctty
Report 0 instead of 268435455 (i.e. 0xFFFFFFF) in the tty field of
/proc/*/stat for processes without a controlling terminal. This is what
the procps utility expects when selecting or excluding such processes.
Thomas Schwinge [Wed, 5 Oct 2022 20:11:41 +0000 (22:11 +0200)]
Generally make all 'long double complex' methods available in <complex.h>
..., not just '#if defined(__CYGWIN__)'. (Exception: 'clog10l' which currently
indeed is for Cygwin only.)
This completes 2017-07-05 commit be3ca3947402827aa52709e677369bc7ad30aa1d
"Fixed warnings for some long double complex methods" after Aditya Upadhyay's
work on importing "Long double complex methods" from NetBSD.
For example, this changes GCC/nvptx libgfortran 'configure' output as follows:
[...]
checking for ccosf... yes
checking for ccos... yes
checking for ccosl... [-no-]{+yes+}
[...]
..., and correspondingly GCC/nvptx 'nvptx-none/libgfortran/config.h' as
follows:
[...]
/* Define to 1 if you have the `ccosl' function. */
-/* #undef HAVE_CCOSL */
+#define HAVE_CCOSL 1
[...]
Similarly for 'ccoshl', 'cexpl', 'cpowl', 'csinl', 'csinhl', 'ctanl', 'ctanhl',
'cacoshl', 'cacosl', 'casinhl', 'catanhl'. ('conjl', 'cprojl' are not
currently being used in libgfortran.)
This in turn simplifies GCC/nvptx 'libgfortran/intrinsics/c99_functions.c'
compilation such that this files doesn't have to provide its own
"Implementation of various C99 functions" for those, when in fact they're
available in newlib libm.
Jon Turney [Fri, 28 Oct 2022 12:35:13 +0000 (13:35 +0100)]
Cygwin: Add loaded module base address list to stackdump
This adds an extra section to the stackdump, which lists the loaded
modules and their base address. This is perhaps useful as it makes it
immediately clear if RandomCrashInjectedDll.dll is loaded...
Future work: It seems like the 'InMemoryOrder' part of
'InMemoryOrderModuleList' is a lie?
Jon Turney [Fri, 28 Oct 2022 11:26:56 +0000 (12:26 +0100)]
Cygwin: Add addresses as module offsets in .stackdump file
This adds an additional column to the stack trace in a .stackdump file,
which gives the stack frame return address as a module name+offset. This
makes it a possible to convert the address to a function name without
having to guess what module the address belongs to.
Corinna Vinschen [Fri, 28 Oct 2022 15:02:05 +0000 (17:02 +0200)]
Cygwin: cygheap: make bucket_val a static const array
Every time the cygheap is initialized, that is, on each fork
or exec, cygheap_init() *again* computes the bucket size values
and stores them in the cgyheap, albeit they are always the
same values anyway.
Make bucket_val a local const array, statically initialized
instead.
Fixes: 61522196c715 ("* Merge in cygwin-64bit-branch.)" Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Corinna Vinschen [Fri, 28 Oct 2022 08:00:17 +0000 (10:00 +0200)]
Cygwin: /proc/<PID>/maps: output cygheap info
Now that the cygheap isn't part of the CYgwin DLL anymore, we have a
known memory location which is not known in maps output. Fix that by
checking for cygheap address (same in all processes) and add to output.
Corinna Vinschen [Thu, 27 Oct 2022 11:05:36 +0000 (13:05 +0200)]
Cygwin: drop objcopy .gnu_debuglink juggle
Prior to 591fec858d01 ("Cygwin: decouple cygheap from Cygwin DLL")
the .cygheap section was required to stay the last section in the
final binary. That required some juggling with objcopy to make
sure the .gnu_debuglink section is prior to the .cygheap section
in the final DLL.
Corinna Vinschen [Wed, 26 Oct 2022 19:22:19 +0000 (21:22 +0200)]
Cygwin: decouple shared mem regions from Cygwin DLL
Another reason ASLR may fail is the coupling of the standard shared
mem regions (global, userinfo, process info, shared console) to the
address of the Cygwin DLL. They are always placed in fixed addresses
preceeding the Cygwin DLL's address. With ASLR this is bound to fail.
Use a fixed, unused memory area to place the shared mem regions.
This also allows to simplify the shared memory creation. There's
no reason anymore to rebase the regions and rather than offsets,
just use the addresses directly.
Corinna Vinschen [Wed, 26 Oct 2022 19:16:35 +0000 (21:16 +0200)]
Cygwin: decouple cygheap from Cygwin DLL
One reason that ASLR is tricky is the fact that the cygheap
is placed at the end of the DLL and especially that it's expected
to be growable. To support ASLR, this construct must go.
Define dedicated cygheap memory region and reserve entire region.
Commit 3 Megs, as was the default size of the cygheap before.
Fix linker script accordingly, drop a now useless version check
in get_cygwin_startup_info().
Sebastian Huber [Mon, 24 Oct 2022 09:05:14 +0000 (11:05 +0200)]
powerpc/setjmp: Fix 64-bit support
The first attempt to support the 64-bit mode had two bugs:
1. The saved general-purpose register 31 value was overwritten with the saved
link register value.
2. The link register was saved and restored using 32-bit instructions.
Use 64-bit store/load instructions to save/restore the link register. Make
sure that the general-purpose register 31 and the link register storage areas
do not overlap.
Corinna Vinschen [Fri, 28 Oct 2022 10:42:51 +0000 (12:42 +0200)]
Cygwin: stop handling files with .com suffix like .exe files
.com is a remnant from the past. There are only five executables
left:
chcp.com
format.com
mode.com
more.com
tree.com
Calling them on the command line already requires to use the
suffix anyway. So drop useless .com test from the execve test
for scripts (they are handled earlier in the same function
as executables) and do not handle them like .exe suffixes in
other functions.
The previous commit 14816de9af69 ("Cygwin: spawn: drop special handling
for cmd.exe and command.com") make this patch unnecessary. The filename
argument (i. e., run_path in the caller) is now always non-NULL.
Corinna Vinschen [Fri, 28 Oct 2022 10:24:13 +0000 (12:24 +0200)]
Cygwin: spawn: drop special handling for cmd.exe and command.com
Apparently at one point handling cmd.exe and command.com special
made sense, but what that should be has never been documented.
There's also no clear reason why cmd.exe is different from any
other native executable. Additionaly, checking for command.com
is entirely useless on 64 bit Windows anyway.
Jon Turney [Thu, 27 Oct 2022 21:51:28 +0000 (22:51 +0100)]
Fix warning during manpage generaton
> ERROR: xref linking to Stubs has no generated link text.
> Error: no ID for constraint linkend: Stubs.
(Despite saying "ERROR", this is actually a warning, and manpages are
still generated)
Improve chapter-texi2docbook so it generates elements for texinfo
sections as well, so that a cross-reference to the "Stubs" section
contains a valid element ID.
- If the command executed is 'cmd.exe /c [...]', runpath in spawn.cc
will be NULL. In this case, is_console_app(runpath) check causes
access violation. This case also the command executed is obviously
console app., therefore, treat it as console app to fix this issue.
Simon Cook [Tue, 18 Oct 2022 19:48:56 +0000 (21:48 +0200)]
libgloss: riscv: Install machine/syscall.h
A recent change to the Makefile.in for riscv resulted in the
machine/syscall.h header not being installed. This updates the file
to install this file again.
Signed-off-by: Simon Cook <simon.cook@embecosm.com>
Ken Brown [Fri, 23 Sep 2022 14:24:04 +0000 (10:24 -0400)]
Cygwin: select: don't report read ready on a FIFO never opened for writing
According to POSIX and the Linux man page, select(2) is supposed to
report read ready if a file is at EOF. In the case of a FIFO, this
means that the pipe is empty and there are no writers. But there
seems to be an undocumented exception, observed on Linux and other
platforms: If no writer has ever been opened, then select(2) does not
report read ready. This can happen if a reader is opened with
O_NONBLOCK before any writers have opened.
This commit makes Cygwin consistent with those other platforms by
introducing a special EOF test, fhandler_fifo::select_hit_eof, which
returns false if there's never been a writer opened.
To implement this we use a new variable '_writer_opened' in the FIFO's
shared memory, which is set to 1 the first time a writer opens. New
methods writer_opened() and set_writer_opened() are used to test and
set this variable.
ld: B/arm-none-eabi/lib/libg.a(libc_a-mallocr.o): in function `malloc_extend_top':
S/newlib-cygwin/newlib/libc/stdlib/_mallocr.c:2161: undefined reference to `sysconf'
Jeff Johnston [Fri, 16 Sep 2022 20:04:21 +0000 (16:04 -0400)]
Implement sysconf for Arm
- add support for using sysconf to get page size in _mallocr.c via
HAVE_SYSCONF_PAGESIZE flag set in configure.host
- set flag in configure.host for arm and add a default sysconf implementation
in libc/sys/arm that returns the page size
- the default implementation can be overridden outside newlib to allow a
different page size to improve malloc on devices with a small footprint
without needing to rebuild newlib
- this patch is based on a contribution from Torbjorn Svensson and
Niklas Dahlquist (https://ecos.sourceware.org/ml/newlib/current/017616.html)
deraadt [Sun, 24 Mar 2019 17:56:54 +0000 (17:56 +0000)]
upstream OpenBSD: arc4random: replace abort() with _exit()
In the incredibly unbelievable circumstance where _rs_init() fails to
allocate pages, don't call abort() because of corefile data leakage
concerns, but simply _exit(). The reasoning is _rs_init() will only fail
if someone finds a way to apply specific pressure against this failure
point, for the purpose of leaking information into a core which they can
read. We don't need a corefile in this instance to debug that. So take
this "lever" away from whoever in the future wants to do that.
The patch fixing the alignment of _cygtls::context accidentally
pushed the desperate attempt to automate the alignment by using
another, non-working variation of attribute((aligned)). Drop it.
In the nano version of malloc, when the last chunk is to be extended,
there is no need to acount for the header again as it's already taken
into account in the overall "alloc_size" at the beginning of the
function.
When using nano malloc and the remaning heap space is not big enough to
fullfill the allocation, malloc will attempt to merge the last chunk in
the free list with a new allocation in order to create a bigger chunk.
This is successful, but the chunk still remains in the free_list, so
any later call to malloc can give out the same region without it first
being freed.
Restore _lock initialization in non-single threaded mode
When __SINGLE_THREAD__ is not defined, stdin, stdout and stderr needs
to have their _lock instance initialized. The __sfp() method is not
invoked for the 3 mentioned fds thus, the std() method needs to handle
the initialization of the lock.
Corinna Vinschen [Mon, 29 Aug 2022 13:18:53 +0000 (15:18 +0200)]
Cygwin: cygtls: fix context alignment
A hang was encountered, apparently triggered by commit 63b503916d42,
changing tls_pathbufs from malloc'ed to HeapAlloc'ed memory. After
lengthy debugging it transpired that adding the heap handle to the
tls_pathbuf struct added 8 bytes to the cygtls area, thus moving
the "context" member by 8 bytes, too, so it was suddently unaligned.
Fix this for now by changing the alignment.
Fix this once and for all, by adding code to the gentls_offsets script
to check if the alignment of the "context" member is 16 bytes. If not,
print a matching error message, remove the just generated file, and exit
with error.
FIXME: It would be really nice to find a way to auomate the correct
alignment of the "context" member, but I don't see any way to use
alignment attributes to get what we need here.
Corinna Vinschen [Mon, 29 Aug 2022 10:25:24 +0000 (12:25 +0200)]
Cygwin: fork: fix a potential hang in fork
while debugging a problem introduced in commit 63b503916d42 ("Cygwin: tls_pathbuf: Use Windows heap")
a hang in fork was encountered using the original implementation
of tls_pathbuf:
Using tmp_pathbuf inside the code block guarded by __malloc_trylock
may call malloc from tmp_pathbuf::w_get and thus trying to lock an
exclusive SRW lock recursively, which results in a deadlock.
Allocate a small SECURITY_ATTRIBUTES block on the stack rather than
allocating a 64K tmp_pathbuf. This avoids the potential malloc call.
Drop the __malloc_trylock call entirely. There must not be a malloc
call inside the frok::parent block guarded by __malloc_lock, and
just trying to lock is too dangerous inside fork while other threads
might actually chage the content of the heap. Additionally, add a
comment frowning on malloc usage inside tis code block.
Corinna Vinschen [Tue, 23 Aug 2022 08:59:18 +0000 (10:59 +0200)]
Cygwin: tls_pathbuf: Use Windows heap
Rather than using malloc/free for the buffers, we're now using
HeapAlloc/HeapFree on a HEAP_NO_SERIALIZE heap created for this
thread.
Advantages:
- Less contention. Our malloc/free doesn't scale well in
multithreaded scenarios
- Even faster heap allocation by using a non serialized heap.
- Internal, local, temporary data not cluttering the user heap.
- Internal, local, temporary data not copied over to child process
at fork().
Disadvantage:
- A forked process has to start allocating temporary buffers from
scratch. However, this should be alleviated by the fact that
buffer allocation usually reaches its peak very early in process
runtime, so the longer the proceess runs, the less buffers have
to allocated, and, only few processes don't exec after fork
anyway.
git://sourceware.org / newlib-cygwin.git / log