Expand description
Implementation of syscalls
The single entry point to all system calls, syscall(), is called
whenever userspace wishes to perform a system call using the ecall
instruction. In this case, the processor raises an ‘Environment call from
U-mode’ exception, which is handled as one of the cases in
crate::trap::trap_handler.
For clarity, each single syscall is implemented as its own function, named
sys_ then the name of the syscall. You can find functions like this in
submodules, and you should also implement syscalls this way.
Modules
Constants
close syscall
condvar_create syscall
condvar_signal syscall
condvar_wait syscallca
dup syscall
enable deadlock detect syscall
exec syscall
exit syscall
fork syscall
fstat syscall
getpid syscall
gettid syscall
gettimeofday syscall
kill syscall
linkat syscall
mmap syscall
munmap syscall
mutex_create syscall
mutex_lock syscall
mutex_unlock syscall
openat syscall
pipe syscall
read syscall
semaphore_create syscall
semaphore_down syscall
semaphore_up syscall
set priority syscall
sleep syscall
spawn syscall
task info syscall
thread_create syscall
unlinkat syscall
waitpid syscall
waittid syscall
write syscall
yield syscall
Functions
handle syscall exception with syscall_id and other arguments