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>
We use enter_critical_section to protect the read and write of priv structures,
sched_lock is mainly used to prevent active context switching caused by nxsem_post.
We do not actively switch contexts when reading and writing priv structures,
so sched_lock can be removed.
Signed-off-by: hujun5 <hujun5@xiaomi.com>
Supported external SDRAM (MT48LC4M32B2B5-6AIT:L) on STM32H745I-DISCO dev board.
Though MT48LC4M32B2B5-6AIT:L SDRAM itself provides 32-bit data bus, STM32H745I-DISCO board
routes only DQ[15:0] bits. Thus only half of the memory can be accessed: the accessible memory
configuration is only 1 Meg x 16 x 4 banks instead of 1 Meg x 32 x 4 banks.
Thus the accessible memory size is 8 MBytes.
Testing:
nsh> ramtest -a 0xD0000000 -s 8388608
RAMTest: Marching ones: d0000000 8388608
RAMTest: Marching zeroes: d0000000 8388608
RAMTest: Pattern test: d0000000 8388608 55555555 aaaaaaaa
RAMTest: Pattern test: d0000000 8388608 66666666 99999999
RAMTest: Pattern test: d0000000 8388608 33333333 cccccccc
RAMTest: Address-in-address test: d0000000 8388608
nsh>
Adding the CONFIG_ARCH_PERF_EVENTS configuration to enable
hardware performance counting，solve the problem that some platform
hardware counting support is not perfect, you can choose to use
software interface.
This is configured using CONFIG_ARCH_PERF_EVENTS, so weak_functions
are removed to prevent confusion
To use hardware performance counting, must:
1. Configure CONFIG_ARCH_PERF_EVENTS, default selection
2. Call up_perf_init for initialization
Signed-off-by: wangming9 <wangming9@xiaomi.com>
From posix spec, if set-user-ID bit is set in the file permissions,
then the effective user ID of the new process shall be set to the
user ID of the new process image file.
Let's ignore whether ST_NOSUID is set on the mounted file system.
https://pubs.opengroup.org/onlinepubs/007904875/functions/exec.html
test step:
hello example build as a module and call geteuid and getegid API.
then set file binary set-user-ID bit on the host.
$ chmod +s apps/bin/hello
nsh> mount -t hostfs -o fs=. /data
nsh> ls -l /data/apps/bin/hello
-rwsrwsr-x 1000 1000 9264 /data/apps/bin/hello
nsh> /data/apps/bin/hello
geteuid:1000
getegid:1000
Signed-off-by: fangxinyong <fangxinyong@xiaomi.com>
if there are two throttled wait, when iob_free occurs, one of wait
will be awakened to execute iob_alloc_committed, but it will fail
to execute, sem will be posted at this time, then another wait will
be awakened. after the other wait thread is awakened, This step is
repeated. the two threads are in the critical_section state and
cannot be switched to other threads. then cpu will busy util timeout.
Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
In function ‘rpmsgblk_unlink_handler’:
misc/rpmsgblk_server.c:340:36: error: ‘const struct block_operations’ has no member named ‘unlink’
340 | msg->header.result = server->bops->unlink(server->blknode);
|
Signed-off-by: chao an <anchao@xiaomi.com>
