Some armv7-m-based SoCs do not work with atomic instructions,
even though armv7-m supports them.
To avoid using atomic instructions generated by gcc,
CONFIG_LIBC_ARCH_ATOMIC is newly introduced with which
arch_atomic.c is linked explicitly.
However, the function names need to be changed to avoid
build errors, since the functions described in stdatomic.h
are gcc built-in and inlined when the code is compiled.
About libcxx with CONFIG_LIBC_ARCH_ATOMIC, it still
does not work. It is also needed to call nx_atomic_ ver
instead of __atomic ver in
libcxx/include/__atomic/cxx_atomic_lmpl.h.
Signed-off-by: Takuya Miyasita <Takuya.Miyashita@sony.com>
Some armv7-m-based SoCs do not work with atomic instructions,
even though armv7-m supports them.
To avoid using atomic instructions generated by gcc,
CONFIG_LIBC_ARCH_ATOMIC is newly introduced with which
arch_atomic.c is linked explicitly.
However, the function names need to be changed to avoid
build errors, since the functions described in stdatomic.h
are gcc built-in and inlined when the code is compiled.
Signed-off-by: Takuya Miyasita <Takuya.Miyashita@sony.com>
1. use '__attribute__((constructor))' mark initialize function
2. use '__attribute__((destructor))' mark uninitialize function
3. compile module with -fvisibility=hidden. use `__attribute__((visibility("default")))`
mark is need export symbol.so not need module_initialize to initialize export symbol.
Signed-off-by: anjiahao <anjiahao@xiaomi.com>
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
The feature depends on ARCH_USE_SEPARATED_SECTION
the different memory area has different access speed and cache
capability, so the arch can custom allocate them based on
section names to achieve performance optimization
test:
sim:elf
sim:sotest
Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
and move common math funtions to math32.h:
div_round_up
div_round_closest
is_power_of_2
roundup_pow_of_two
rounddown_pow_of_two
Signed-off-by: lipengfei28 <lipengfei28@xiaomi.com>
the detailed warning info are:
CC: syslog/vsyslog.c "pthread/pthread_create.c", line 443: warning #1931-D: operand of sizeof is
not a type, variable, or dereferenced pointer expression
ptcb->cmn.timeslice = MSEC2TICK(CONFIG_RR_INTERVAL);
^
CC: dirent/lib_closedir.c "sched/sched_profil.c", line 81: warning #1931-D: operand of sizeof is not a
type, variable, or dereferenced pointer expression
wd_start(&prof->timer, PROFTICK, profil_timer_handler, arg);
^
"sched/sched_profil.c", line 142: warning #1931-D: operand of sizeof is not a
type, variable, or dereferenced pointer expression
wd_start(&prof->timer, PROFTICK, profil_timer_handler, (wdparm_t)prof);
^
CC: common/arm_modifyreg8.c "sched/sched_setscheduler.c", line 165: warning #1931-D: operand of sizeof is
not a type, variable, or dereferenced pointer expression
tcb->timeslice = MSEC2TICK(CONFIG_RR_INTERVAL);
^
CC: misc/lib_utsname.c "sched/sched_unlock.c", line 275: warning #1931-D: operand of sizeof is not a
type, variable, or dereferenced pointer expression
rtcb->timeslice = MSEC2TICK(CONFIG_RR_INTERVAL);
^
"sched/sched_roundrobin.c", line 119: warning #1931-D: operand of sizeof is
not a type, variable, or dereferenced pointer expression
tcb->timeslice = MSEC2TICK(CONFIG_RR_INTERVAL);
^
CC: armv7-m/arm_fpuconfig.c cxarm: Error: No files. Try -help.
CC: misc/lib_crc8ccitt.c cxarm: Error: No files. Try -help.
cxarm: Error: No files. Try -help.
CC: getprime_main.c cxarm: Error: No files. Try -help.
cxarm: Error: No files. Try -help.
CC: misc/lib_log2ceil.c cxarm: Error: No files. Try -help.
CC: task/task_start.c "task/task_setup.c", line 423: warning #1931-D: operand of sizeof is not a
type, variable, or dereferenced pointer expression
tcb->timeslice = MSEC2TICK(CONFIG_RR_INTERVAL);
^
Signed-off-by: guoshichao <guoshichao@xiaomi.com>
64-by-32-bit divisions are prominent in the NuttX, even on 32-bit
machines. Luckily, many of them use a constant divisor that allows
for a much faster multiplication by the divisor's reciprocal.
The compiler already performs this optimization when compiling a 32-by-32
division with a constant divisor. Unfortunately, on 32-bit machines, gcc
does not optimize 64-by-32 divisions in that case, except for constant
divisors that happen to be a power of 2.
Let's avoid the slow path whenever the divisor is constant by manually
computing the reciprocal ourselves and performing the multiplication
inline. In most cases, this improves performance of 64-by-32 divisions
by about two orders of magnitude compared to the __div64_32() fallback,
especially on architectures lacking a native div instruction.
Signed-off-by: ligd <liguiding1@xiaomi.com>
Summary:
1.Modify the conditions for entering different include header files
2.Added pre-definition for _Atomic _Bool when it is missing
3.Added nuttx for stdatomic implementation. When toolchain does not support atomic, use lib/stdatomic to implement it
Signed-off-by: chenrun1 <chenrun1@xiaomi.com>
This adds IS_POWER_OF_2 macro to help catching config errors at
build time.
Signed-off-by: Yanfeng Liu <yfliu2008@qq.com>
Signed-off-by: Yanfeng Liu <yfliu2008@qq.com>
both functions aren't suitable to be put into libc,
because they call the kernel internal functions directly.
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
* build-globals.sh
- Only look in the nuttx for external symbols used when loading
dynamic shared objects
* include/elf64.h
- Correct the type of fields in the Elf64_Phdr structure
* libs/libc/dlfcn/lib_dlclose.c
- Distinguish between ET_DYN and other objects as the former
has both text and data in a single allocation to reserve
GOT offsets
* libs/libc/dlfcn/lib_dlopen.c
- Code formatting
* libs/libc/modlib/modlib_bind.c
- Distinguish between relocation entry sizes by section type
- Handle RELA style relocations
* libs/libc/modlib/modlib_globals.S
- Formatting fixes
- Symbols should not be weak - they exist or they don't
* include/nuttx/lib/modlib.h
- Add an inidcator to module_s to distinguish between ET_DYN and other
* libs/libc/modlib/modlib_load.c
- ET_DYN objects need to keep the relative displacement between the text
and data sections due to GOT references from the former to the latter.
This also implies that linking may require modification from the default
for the shared objects being produced. For example, default alignment may
mean nearly 64K of wasted space.
* libs/libc/modlib/modlib_unload.c
sched/module/mod_rmmod.c
- Distingusih between freeing of ET_DYN storage and other as the former
is a single allocation.
* libs/libc/modlib/mod_insmod.c
- Cater for ET_DYN objects having init and preinit sections
Implement I_SUID/I_SGID feature for binfs in the POSIX compliant way.
If set-user-ID bit is set in the file permissions, then the effective
user ID of process shall be set to UID of the new process image file.
test case:
hello example emulates to set uid and file set-user-ID bit, and call
geteuid and getegid API.
UID = 2000
GID = 3000
MODE = 06555
nsh> ls -l /bin/hello
-r-sr-sr-x 2000 3000 0 hello
nsh> hello
geteuid:2000
getegid:3000
Signed-off-by: fangxinyong <fangxinyong@xiaomi.com>
The memory allocated with strdup and asprintf is done via lib_malloc
so we need to use lib_free to deallocate memory otherwise the assertion
"Free memory from the wrong heap" is hit with flat mode and user separated
heap enabled mode.
Signed-off-by: Petro Karashchenko <petro.karashchenko@gmail.com>
* libs/libc/machine/arm/armv7-m/arch_elf.c
- Fix cast of error message parameters
* build-globals.sh
- Build the modlib_globals.S file used to resolve symbols when dynamically loading
* libs/libc/modlib/Make.defs
- Build modlib_globals.S for all targets
* libs/libc/modlib/modlib_load.c
- Calculate sizes and text/data addresses based on program headers rather than section headers
- Handle objects with no program headers
* libs/libc/modlib/modlib_bind.c
- Call modlib_readsym with pointer to symbol table
- Add modlib_relocatedyn to manage relocation of symbols with shared object (ET_DYN)
- Differentiate between ET_REL and ET_DYN objects
- Use arch independent symbol ELF_R_SYM
- Cast sizes to avoid warnings
* libs/libc/modlib/modlib_load.c
- Cast sizes to avoid warnings
* include/elf.h
- Add definitions that may be found in shared objects
* include/nuttx/lib/modlib.h
- Add parameter to modlib_readsym prototype
- Add prototypes for:
- modlib_insertsymtab
- modlib_findglobal
- Define Elf_Dyn and Elf_Off according to the elf architecture
- Add fields to mod_loadifno_s:
- Program headers
- Exported symbols
- Data section address
- Padding requirement
- Section index for dynamic symbol table
- Number of symbols exported
- Add prottotype for modlib_freesymtab
* libs/libc/dlfcn/lib_dlclose.c
- Free the symbol table when the dll is closed
* libs/libc/dlfcn/lib_dlopen.c
- Add dump of program headers to debug routine
- Differentiate between ET_REL and ET_DYN objects
* libs/libc/machine/arm/armv7-m/arch_elf.c
- Add handling of R_ARM_RELATIVE and R_ARM_JUMP slot relocation types
* libs/libc/modlib/modlib_loadshdrs.c
- Rename modlib_loadshdrs.c to modlib_loadhdrs.c
- Rename modlib_loadshdrs to modlib_loadhdrs
- Add code to load program headers
* libs/libc/modlib/modlib_symbols.c
- Define entry point structure
- Add offset parameter to modlib_symname() and use to find symbol names
- Add symtab section header parameter to modlib_readsym()
- Add offset parameter to modlib_symvalue() to locate symbol names
- Add modlib_insertsyntab() to create a symbol table for exporting and resolution
- Add findEP() to resolve a symbol in the modlib_global table
- Add modlib_findglobal() to find symbol in the modlib_global table
- Add modlib_freesymtab() to free the symbol table
* libs/libc/modlib/modlib_uninit.c
- Free header and sections from a module_loadinfo_s control block
* libs/libc/modlib/modlib_verify.c
- Handle ET_DYN shared objects
* libs/libc/modlib/modlib_globals.S
- Multi-target global table
- Define library APIs that may be resolved when loading a shared object
Use lib_get_stream() to fetch stdin/stdout/stderr,
since is more easy to works with other language by function call
than export native C structure memory layout.
Signed-off-by: Huang Qi <huangqi3@xiaomi.com>
