assembly - GAS what does @ and .type do? -

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i reading following code online. wondering @ symbol next function call means. wondering .type exactly. can point me url explains different .types?

.section .rodata lhello:         .asciz "hello!"  .section .text         .globl somerelocations         .type somerelocations, stt_func somerelocations:         leaq lhello(%rip), %rdi         call puts@plt         ret

the ".type" keyword place information object file generated saying "somerelocations" of type stt_func (which means: function).

the linker and/or debuggers may use information. on cpus (such arm variants tht support both thumb , arm modes) linker must know if "somerelocations" function or variable because linking done bit differently functions , variables in case.

for assembler "@" regular character @ point. "puts@plt" processed assembler same way "putsxplt" processed.

to unprecise: when position-independent file being generated linker requires "@plt" added function names.


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