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Syscalls pass by int64. The identifier of the called function is in eax, parameters
are in ebx, ecx, edx, esi, edi.
Syscall list :
id=eax Name Parameters Description
0 thread_exit none Signal kernel that current thread has finished
1 schedule none Switch to next thread (might be the current one)
2 thread_sleep ebx: time (int) msecs Tell kernel to put current thread to sleep
3 process_exit ebx: return value (int) Tell kernel to end current process, cleaning up everything
4 printk ebx: addr of a string Print a message to screen
5 thread_new ebx: entry point Creates a new thread
ecx: data pointer
edx: stack pointer
6 irq_wait ebx: irq number Waits for an IRQ (requires privilege PL_DRIVER)
7 proc_priv none Returns current process privilege level
8 proc_setheap
9 shm_create ebx: offset Create a shared memory segment at offset (ret = errcode)
ecx: length
10 shm_delete ebx: offset Delete a shared memory segment at offset (ret = errcode)
11 msg_register ebx: service id Registers current process as owner of a system channel (ret = errcode)
12 msg_send ebx: receiver pid Sends a message to pid or owner of system channel
ecx: message data ptr
edx: message length
13 msg_info ebx: answer struct ptr Get info on the first message of the queue for this process
ecx: wait?
14 msg_get ebx: pointer to data Gets the data for first message on the queue; deletes message from queue
If a processes wishes to exit with an error code, it HAS to use process_exit. thread_exit will do nothing.
====== SYSCALL DESCRIPTION ======
= msg_register (10)
Parameters: requested system channel id (int)
Returns: errorcode or 0 on success
Registers current process as owner of given system channel.
= msg_send (11)
Parameters: receiver pid (signed! int), data ptr (void*), data len (unsigned)
Returns: errorcode or 0 on success
Sends a message to given PID or owner of given system channel.
= msg_info (12)
Parameters: pointer to answer struct (msg_info_answer*), wait for request? (bool)
Returns: nothing (all is in answer struct)
Gets info on waiting messages for current process.
= msg_get (13)
Parameters: pointer to data struct (void*)
Returns: errorcode or 0 on failure
Gets the data for a message that is in the queue.
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