The SYSCALL
and TRAP
instructions both trigger exceptions, but the resulting exception is of a different type (SystemCall versus Trap), and the operating system will likely handle them differently.
Difference between Syscall and Traps
-
11-12-2021 - |
Question
I am wondering if there is any difference between the MIPS syscall and trap instructions. I can't find anything involving this, so I am not sure if there is a difference. Traps seem to just be a conditional syscall, but some clarifying can be helpful.
Solution
OTHER TIPS
A Trap
is an exception switches to kernel mode by invoking a kernel sub-routine (any system call). Usually trap creates any kind of control transfer to operating system. Where as SYSCALL
is synchronous and planned user process to kernel mode.
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