參數(shù)資料
型號(hào): RX30000
英文描述: RX4000 Installation | User's Manual[10/2001]
中文描述: RX4000安裝|用戶手冊(cè)[10/2001]
文件頁(yè)數(shù): 46/111頁(yè)
文件大?。?/td> 391K
代理商: RX30000
CHAPTER 5 INTERFACE LIBRARIES
User's Manual U13687EJ1V2UM
46
5.2 SYSTEM CALL INTERFACE LIBRARY
The main operation of the system call interface library is detailed below. The method of system call parameter
hand-over, however, complies with the C compiler used.
Saves the address setting for the return from the system call into the ra ($31) register.
Sets E_OK = 0 in the v0 ($2) register.
Sets the system call function number in the v1 ($3) register.
Checks the system call parameters.
Transfers control to the system call entry by using the syscall statement.
If an error is detected as the result of the system call parameter check, the interface library executes the
following:
Sets the error code associated with the detected error into the v0 ($2) register.
Transfers control to the system call entry by using the syscall statement.
5.3 EXTENDED SVC HANDLER INTERFACE LIBRARY
The main operation of the extended SVC handler interface library is detailed below. The method of extended
SVC handler parameter hand-over, however, complies with the C compiler being used.
Saves the address setting for the return from the extended SVC handler into the ra ($31) register.
Sets E_OK = 0 in the v0 ($2) register.
Sets the extended SVC handler function number in the v1 ($3) register.
Checks the extended SVC handler parameters.
Transfers control to the extended SVC handler entry by using the syscall statement.
If an error is detected as a result of the extended SVC handler parameter check, the interface library executes
the following:
Sets the error code associated with the detected error into the v0 ($2) register.
Transfers control to the system call entry by using the syscall statement.
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