Signals in NuttX serve two primary purposes:
1. Synchronization and wake-up:
Signals can be used to block threads on specific signal sets and later
wake them up by delivering the corresponding signals to those threads.
2. Asynchronous notification:
Signals can also be used to install callback handlers for specific signals, allowing threads to
asynchronously invoke those handlers when the signals are delivered.
This change introduces the ability to disable all signal functionality to reduce footprint for NuttX.
Signed-off-by: Chengdong Wang wangchengdong@lixiang.com
Signals in NuttX serve two primary purposes:
1. Synchronization and wake-up:
Signals can be used to block threads on specific signal sets and later
wake them up by delivering the corresponding signals to those threads.
2. Asynchronous notification:
Signals can also be used to install callback handlers for specific signals, allowing threads to
asynchronously invoke those handlers when the signals are delivered.
This change introduces the ability to partially disable signal functionality: to disable only signal functions for
Asynchronous notification, keeping functions for Synchronization and wake-up.
This enables finer-grained control over signal usage while preserving existing behavior for supported use cases.
Co-authored-by: Guo Shichao guoshichao@xiaomi.com
Signed-off-by: Chengdong Wang wangchengdong@lixiang.com
Replace global enter_critical_section() with lightweight spinlock in
gethostname() and sethostname() to reduce interrupt latency while protecting
access to the shared hostname string.
Signed-off-by: hujun5 <hujun5@xiaomi.com>
Fix arm64_backtrace to access TCB register context directly instead of using
running_regs(), which may not reflect the actual context being backtraced.
Add CONFIG_ARCH_HAVE_DEBUG guard to prevent undefined references in non-debug builds.
Signed-off-by: hujun5 <hujun5@xiaomi.com>
Replace synchronous nxsched_smp_call with asynchronous nxsched_smp_call_async
in gdb debugpoint operations to prevent deadlocks when called from IRQ handlers.
Use static smp_call_data_s for async communication between SMP cores safely.
Signed-off-by: hujun5 <hujun5@xiaomi.com>
Add three POSIX‑required pthread‑related constants to limits.h:
- _POSIX_THREAD_DESTRUCTOR_ITERATIONS
- _POSIX_THREAD_KEYS_MAX
- _POSIX_THREAD_THREADS_MAX
These constants are needed for full POSIX pthread compatibility and are
required by certain PSE52 test suites and applications.
Signed-off-by: guoshichao <guoshichao@xiaomi.com>
Initialize the rlim_max field in the rlp structure when handling
UL_SETFSIZE command in ulimit(), resolving an uninitialized variable
warning from Coverity static analysis.
Signed-off-by: guoshichao <guoshichao@xiaomi.com>
implement the ulimit() based on getrlimit/setrlimit function.
the ulimit() function is requiredd by vsx testset
Signed-off-by: guoshichao <guoshichao@xiaomi.com>
This commit contains changes:
1) define new C++ locale macros CXX_MINI_LOCALIZATION & CXX_NO_LOCALIZATION
2) define a new C++ macro _LIBCPP_HAS_MINI_LOCALIZATION for CXX_MINI_LOCALIZATION
3) update libxx/libcxx/CMakeLists.txt & Make.defs
Signed-off-by: v-zhangxiaomeng5 <v-zhangxiaomeng5@xiaomi.com>
when we build with greenhills compiler, if the exception_common function
is put into a separate section: ".text.exception_common", then the
address of exception_common function is an even number, for example "0x16a6c",
in this case, it will trigger the UsageFaults:INVSTATE error.
The reason for this error is that in the GHS compiler, a section declared
through the ".section" directive must specify at least the "a" attribute.
Otherwise, this section will not be linked into the final file, and this
is why the address of exception_common function is invalid.
The following is the official explanation in the GHS compiler documentation:
"The reason for this error is that in the GHS compiler, a section
declared through the .section directive must specify at least the "a"
attribute. Otherwise, this section will not be linked into the final
file. The following is the official explanation in the documentation:
"Sections that are intended be part of the final linked output should
have at least the `a` attribute"
and for GHS compiler, the .text section is recommended specify the
attribute of `ax`.
Signed-off-by: guoshichao <guoshichao@xiaomi.com>
If the nameserver already exists, return directly without calling dns_notify_nameserver to prevent cyclic notifications and high CPU usage.
Signed-off-by: daichuan <daichuan@xiaomi.com>
Without this fix, values of x where x * x + 1 are rounded
down could make asin() argument to be out of range.
Signed-off-by: Carlos Sanchez <carlossanchez@geotab.com>
During the build of PSE52 VSX testcases, the pthread_equal() is accessed
in the form of a function pointer. Therefore, we have changed the
implementation of pthread_equal() from a macro to an actual function.
Signed-off-by: guoshichao <guoshichao@xiaomi.com>
Updated freopen function in libc stdio to close the old file descriptor before reopening the file.
Signed-off-by: pengyinjie <pengyinjie@xiaomi.com>
Signed-off-by: ligd <liguiding1@xiaomi.com>
Change the 'pos' parameter of fsetpos() from 'fpos_t *' to 'const fpos_t *'
in both the prototype and implementation, aligning with POSIX specification
which requires the position parameter to be const-qualified.
Signed-off-by: guoshichao <guoshichao@xiaomi.com>
This fix forces libcxxabi to parse typeinfo ptr in absolute relocation instead of GOT-REL.
Signed-off-by: v-zhangxiaomeng5 <v-zhangxiaomeng5@xiaomi.com>
Fix typo in CMakeLists.txt: CONFIG_LIB_USRWORK → CONFIG_LIBC_USRWORK.
This ensures work_usrthread.c, work_queue.c, and work_cancel.c are compiled
when the user work queue feature is enabled.
Signed-off-by: guoshichao <guoshichao@xiaomi.com>
Introduce CONFIG_LIBC_DISABLE_HEXSTR_TO_FLOAT to remove support for
parsing hexadecimal floating-point constants (C99 %a) in strtod(),
strtof(), strtold(), and sscanf("%a"). This feature is rarely used in
embedded systems and its removal saves significant flash space. Decimal
float parsing remains unaffected.
Signed-off-by: Peter van der Perk <peter.vanderperk@nxp.com>
for output to avoid log disorder.
If no newline character is found, and the buffer is full, forced output
is required; if the buffer is not full, output is performed according to
the newline character to prevent log disorder.
Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
This patch extends CLOCKFD support to clock_getres(), allowing
applications to query the resolution of PTP clocks through file
descriptors using the standard POSIX clock API.
Key changes include:
1. Move clock_getres() from libc to kernel:
- Relocated from libs/libc/sched/clock_getres.c to sched/clock/
- Enables direct kernel-level file descriptor handling
- Maintains POSIX compliance while adding CLOCKFD support
2. CLOCKFD support in clock_getres():
- Detects CLOCKFD-encoded clockids using CLOCKFD_TO_FD() check
- Extracts file descriptor from clockid parameter
- Validates file descriptor through fs_getfilep()
- Issues PTP_CLOCK_GETRES ioctl to query clock resolution
3. PTP clock resolution query:
- Retrieves resolution from PTP clock device via ioctl
- Returns nanosecond-precision timing resolution
- Enables applications to determine clock accuracy capabilities
- Falls back to standard clock resolution for non-CLOCKFD clockids
4. Error handling:
- Returns EINVAL for invalid CLOCKFD file descriptors
- Properly manages file reference counting with fs_putfilep()
- Maintains backward compatibility with existing clock types
5. Build system updates:
- Updated libs/libc/sched/CMakeLists.txt and Make.defs
- Updated sched/clock/CMakeLists.txt to include clock_getres.c
- Ensures proper compilation in kernel context
Usage example:
int fd = open("/dev/ptp0", O_RDONLY);
struct timespec res;
clock_getres(CLOCKFD(fd), &res); /* Query PTP clock resolution */
printf("Resolution: %ld.%09ld sec\n", res.tv_sec, res.tv_nsec);
close(fd);
This completes the basic POSIX clock API support for dynamic PTP clocks,
providing applications with comprehensive clock information access.
Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
This allows the compiler to automatically identify which string functions
can be compiled into libraries, and the compiler's internal implementation
is faster than libc functions.
Signed-off-by: anjiahao <anjiahao@xiaomi.com>
Causing kernel build report undefined reference 'g_nx_initstate'
Also protect build, as user elf have no access of kernel objects.
Signed-off-by: buxiasen <buxiasen@xiaomi.com>
(gdb) bt
at /home/mi/ssd/dev-system/nuttx/include/string.h:321
ppcmd=<synthetic pointer>, vtbl=0x80069498) at nsh_parse.c:1909
param=0x800692b8) at nsh_parse.c:2593
cmdline=cmdline@entry=0x80069750 "hello") at nsh_parse.c:3028
argc=argc@entry=1, argv=argv@entry=0x80068870) at nsh_session.c:246
at nsh_consolemain.c:75
at nsh_main.c:74
...
Signed-off-by: yangao1 <yangao1@xiaomi.com>
riscv-none-elf-ld: /home/ligd/platform/dev-system/nuttx/staging/libc.a(arch_libc.o): in function `memcpy':
/home/ligd/platform/dev-system/nuttx/libs/libc/machine/arch_libc.c:131:(.text.memcpy+0x4e): undefined reference to `arch_memcpy'
Signed-off-by: ligd <liguiding1@xiaomi.com>
Currently the code for strtof, strtod and strtold is in the list
of files to compile unconditionally, but when trying to compile
kernel with toolchain without libm support (LIBM_NONE=y) compilation
fails because code refers math.h
Signed-off-by: Petro Karashchenko <petro.karashchenko@gmail.com>
The original condition incorrectly used &h->chunk instead of
h->chunk in the calculation whether the object is in the chunk. This
could lead to the wrong behavior as the first branch gave incorrect
result and thus sometimes the entire obstack was freed even though
object was not NULL.
The commit also simplifies the logic, we can use pointer arithmetic
here and just do h->chunk + 1 as it gives the same result as
(FAR char *)h->chunk + sizeof(struct _obstack_chunk). This saves
unnecessary cast and sizeof.
The second branch should be less than or equal, not just less than.
This ensures the object is correctly located in the chunk even after
previous obstack_finish was called.
Signed-off-by: Michal Lenc <michallenc@seznam.cz>
Co-authored-by: Karel Kočí <kkoci@elektroline.cz>
newlib/libm/fenv/*.c are the non-functional implementation that should
be overridden by an architecture specific implementation in newlib/libm/machine/ARCH.
Make the architecture check for including shared x86 sys headers for x86 and x86_64.
Signed-off-by: fangxinyong <fangxinyong@xiaomi.com>
Implement filename-based filtering to exclude duplicate files
from source lists, ensuring ARCH-specific files (ARCH_CSRCS)
take precedence over files in common or other dirs
Signed-off-by: fangxinyong <fangxinyong@xiaomi.com>
Add back these functions since clang will use them.
This reverts "libs/libc/arm: use builtin routines instead of aliases of __aeabi_mem*"
and adds source files to cmake.
Signed-off-by: chenxiaoyi <chenxiaoyi@xiaomi.com>
