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Return address. In postal mail, a return address is an explicit inclusion of the address of the person sending the message. It provides the recipient (and sometimes authorized intermediaries) with a means to determine how to respond to the sender of the message if needed.
In computer programming, a return statement causes execution to leave the current subroutine and resume at the point in the code immediately after the instruction which called the subroutine, known as its return address. The return address is saved by the calling routine, today usually on the process's call stack or in a register.
Dead letter office. A dead letter office ( DLO) is a facility within a postal system where undeliverable mail is processed. [4] Mail is considered to be undeliverable when the address is invalid so it cannot be delivered to the addressee, and there is no return address so it cannot be returned to the sender.
When foo() returns, it pops the return address off the stack and jumps to that address (i.e. starts executing instructions from that address). Thus, the attacker has overwritten the return address with a pointer to the stack buffer char c[12], which now contains attacker-supplied data.
When a function calls itself recursively, a return address needs to be stored for each activation of the function so that it can later be used to return from the function activation. Stack structures provide this capability automatically.
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HTTP 403 is an HTTP status code meaning access to the requested resource is forbidden. The server understood the request, but will not fulfill it, if it was correct.
A post office box (commonly abbreviated as P.O. box, or also known as a postal box) is a uniquely addressable lockable box located on the premises of a post office . In some regions, particularly in Africa, there is no door-to-door delivery of mail; for example, in Kenya. [citation needed] Consequently, renting a PO box has traditionally been ...
A bounce address is an email address to which bounce messages are delivered. There are many variants of the name, none of them used universally, including return path, reverse path, envelope from, envelope sender, MAIL FROM, 5321-FROM, return address, From_, Errors-to, etc.
Link register. A link register (LR for short) is a register which holds the address to return to when a subroutine call completes. This is more efficient than the more traditional scheme of storing return addresses on a call stack, sometimes called a machine stack.
A return retrieves the saved contents of the PC and places it back in the PC, resuming sequential execution with the instruction following the subroutine call. Hardware implementation [ edit ] In a simple central processing unit (CPU), the PC is a digital counter (which is the origin of the term "program counter") that may be one of several ...