RTEMS CPU Architecture Supplement
The i386 architecture supports a simple yet effective
call and return mechanism. A subroutine is invoked via the call
(call) instruction. This instruction pushes the return address
on the stack. The return from subroutine (ret) instruction pops
the return address off the current stack and transfers control
to that instruction. It is is important to note that the i386
call and return mechanism does not automatically save or restore
any registers. It is the responsibility of the high-level
language compiler to define the register preservation and usage
convention.
RTEMS CPU Architecture Supplement
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