This indeed refers to "Common". From the ELF spec:
SHN_COMMON
Symbols defined relative to this section are common symbols, such as FORTRANCOMMON
or unallocated C external variables.
Question
There are a few section names in objdump output that have some unique names, like
I guess *ABS* stands for ABSolute and denotes a symbol that doesn't belong to any section. External variables go to *COM* section. It seems that external functions go down to UNDefined. My questions are — what does COM stand for? What does it contain besides references to external variables? What are other sections like those two?
Solution
This indeed refers to "Common". From the ELF spec:
SHN_COMMON
Symbols defined relative to this section are common symbols, such as FORTRANCOMMON
or unallocated C external variables.