What is ?toolchain linker file】mean？

[Raytheon]

Hello everyone, when I was watching the stm32f429 routine, there was an example of upgrading the user program with the U disk. It was mentioned that the configuration of the user program needs to change the contents of the [toolchain linker file]. Where is the [toolchain linker file]?

[Tesla DeLorean]

A .LD file under the project directory describing the memory available for the linker to use.​

[Raytheon]

OK，thank you�?​