Native gdb makes a ptrace (GET_THREAD_AREA) which needs to return the
TP. however when libc sets up TP reg (for main thread), it doesn't call
arc_settls syscall so kernel doesn't know of TP register details
(moreso because clone doesnt have SETTLS flag)
Note that kernel doesn't know about r25 being TP etc.
This commit got lost in merge of NPTL tools into arc-mainline-dev and
showed up again as STAR 9000919529 (native gdb can't debug threaded
apps)
------->8---------------
[ARCLinux]# gdb ./pth
Reading symbols from ./pth...(no debugging symbols found)...done.
(gdb) b main
Breakpoint 1 at 0x106f2
(gdb) r
Starting program: /pth
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/libthread_db.so.1".
thread_get_info_callback: cannot get thread info: generic error
(gdb) q
------->8---------------
Debugged-by: Anton Kolesov <akolesov@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
uClibc doesn't define signal info for the SIGSYS signal which is issued
in case of hitting a syscall prohibited by seccomp.
This is sad as it makes debugging seccomp filter policies impossible on
some architectures (at least ARM and PowerPC, maybe also others) which
do not coincidentally set si_value.sival_int as the syscall number.
To fix this, import the definitions and macros needed from glibc.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
When attempting to build uClibc under buildroot, including building the
tests, the silly tests don't currently compile, a result of attempting
to build using a compiler that does not yet have an installed version of
uClibc available. The error is a missing header file, specifically
atomic.h.
Taking inspiration from the nptl tests, I have extended the EXTRA_CFLAGS
variable to add the required include paths. The tests can now be built
under buildroot.
Signed-off-by: Andrew Burgess <andrew.burgess@embecosm.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
The current code implements the 'm' modifier only for 's'
conversions and would cause a segfault if it was used for 'c'
or '[' conversions. This patch extends the code to cover these
cases too.
The original version could write scanned data outside the passed buffer
because index i used in the '[' conversion handling block was clobbered.
Signed-off-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
(__pthread_initialize_minimal_internal): Initialize pd->report_events
to that.
This patch helps NPTL report TD_CREATE event, so that GDB could catch the
event and update its thread_list.
Link: http://lists.uclibc.org/pipermail/uclibc/2015-April/048921.html
[shengyong:
- original patch from glibc: commit 7d9d8bd18906fdd17364f372b160d7ab896ce909
- context adjust
- update nptl_db/ChangeLog]
Signed-off-by: Roland McGrath <roland@gnu.org>
Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Previously V=1 did print abbreviated commands and V=2 the full commands.
Kbuild-based build-systems behave in the opposite way and this is
apparently confusing or inconvenient for users so swap our V handling to
be in line with kbuild (and automake as far as V=0 / V=1 is concerned).
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
since ae9e3f46 sched.h pulls in stdlib.h (for malloc() and free()) and
thus also xlocale..
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
In file included from ./include/sys/syscall.h:33:0,
from libc/sysdeps/linux/common/sync_file_range.c:10:
libc/sysdeps/linux/common/sync_file_range.c: In function '__sync_file_range_nocancel':
./include/bits/syscalls.h:144:16: error: conflicting types for '_v3'
register int _v3 __asm__ ("v3") = _v3tmp;
^
./libc/sysdeps/linux/arm/sysdep.h:281:7: note: in expansion of macro 'LOAD_ARGS_7'
LOAD_ARGS_##nr (args) \
^
./libc/sysdeps/linux/arm/sysdep.h:324:2: note: in expansion of macro 'INTERNAL_SYSCALL_RAW'
INTERNAL_SYSCALL_RAW(SYS_ify(name), err, nr, args)
^
./libc/sysdeps/linux/arm/sysdep.h:256:40: note: in expansion of macro 'INTERNAL_SYSCALL'
({ unsigned int _inline_sys_result = INTERNAL_SYSCALL (name, , nr, args); \
^
libc/sysdeps/linux/common/sync_file_range.c:32:9: note: in expansion of macro 'INLINE_SYSCALL'
return INLINE_SYSCALL(sync_file_range, 7, fd, 0,
^
In file included from ./libpthread/nptl/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h:18:0,
from ./include/cancel.h:58,
from libc/sysdeps/linux/common/sync_file_range.c:15:
./libc/sysdeps/linux/arm/sysdep.h:280:21: note: previous definition of '_v3' was here
register int *_v3 __asm__ ("v3") = _sys_buf; \
...
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
ucontext_i.h too depends on uClibc_config.h.
Update it to look like the other MANGLE generated files and tweak
prereqs
Fixes: make realclean ; make -j libc/misc/internals/__uClibc_main.i
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
We were ending up with multiple entries in LIBGCC for recursive child
make instances, avoid that.
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
when building uClibc with -O0 (DODEBUG build) the default sigrestorer
had some extra glue code generated for stack manipulation which was
messing up resume from signal path.
So annotate the function with -Os so that gcc would only generate the
bare min 2 instruction TRAP sequence
Reported-and-Debugged-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
The R_ARC_NONE relocation is generated when --gc-sections, used by the
compile time linker, removes some sections. This is completely normal,
and we can see that all other targets (based on random sampling) have
support for R_*_NONE relocations (named for each target).
Handling R_ARC_NONE involves doing nothing with it, which is nice and
easy.
Signed-off-by: Andrew Burgess <andrew.burgess@embecosm.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
where SIMULATOR_glibc is an optional simulator to run host binaries and
SIMULATOR_uclibc is an optional simulator to run target (uClibc)
binaries.
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Otherwise gcc might not understand that oom() ended control-flow and
might emit an (untaken) reference to abort() in _dl_update_slotinfo()
on e.g. SH4 which breaks linking ld-uClibc.so.
Arguably -ffreestanding should prevent GCC from emitting this
'.global abort' but alas, it does not, which is another bug..
Also mark the function cold to further lower the incoming frequency and
branch probability.
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
