Section vs segment
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We will get into more detail later, but it is good to have it in mind now:
- section: exists before linking, in object files.One ore more sections will be put inside a single segment by the linker.Major information sections contain for the linker: is this section:
- raw data to be loaded into memory, e.g.
.data,.text, etc. - or metadata about other sections, that will be used by the linker, but disappear at runtime e.g.
.symtab,.srttab,.rela.text
- raw data to be loaded into memory, e.g.
- segment: exists after linking, in the executable file.Contains information about how each segment should be loaded into memory by the OS, notably location and permissions.