參數(shù)資料
型號: RX78K4
英文描述: 78K/IV Series Real-Time OS Fundamental | User's Manual[01/1997]
中文描述: 78K/IV系列實時操作系統(tǒng)的基本|用戶手冊[01/1997]
文件頁數(shù): 38/96頁
文件大?。?/td> 265K
代理商: RX78K4
CHAPTER 4 RX78K/IV SYSTEM CALL LIST
29
Fig. 4-1 Entry Address Storage Table
sta_tsk
ext_tsk
00H
get_ver
.
.
.
.
… Entry address of target system call
… If system call is not selected
Be sure to directly call the following i
′′′
_
′′′
system call issued from the interrupt handler, without going through
the branching module. The values in the brackets indicate the addresses of the CALLT table. However,
addresses corresponding to unused system calls can be used by users.
ichg_pri (42H), irot_rdq (44H), iwup_tsk (46H), iset_flg (48H),
isig_sem (4AH), isnd_msg (4CH)
The ret_int and ret_wup system calls are branched out to system calls directly by the BR command.
Differences between “
′′′
_
′′′
” and “i
′′′
_
′′′
” system calls
System call “i
′′′
_
′′′
” is started by an interrupt handler and is not dispatched its own. This system call is
dispatched when “ret_int” has been issued that returns execution from the interrupt handler, or “ret_wup” that
returns execution from the interrupt handler and wakes up a task. When a system call is recovered from the
interrupt handler with the RETI command, dispatching occurs in the next system call.
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