1) In GET_GOT(x) what does " lwz r0,0b-1b(r14) ;" do? what does
"0b-1b" stands for, or the meaning of the syntax? why move the content
of the memory pointing by LR?

#define GET_GOT \
>> bl 1f ; \
>> .text 2 ; \
>> 0: .long .LCTOC1-1f ; \
>> .text ; \
>>1: mflr r14 ; \
>> lwz r0,0b-1b(r14) ; \
>> add r14,r0,r14 ;

2) In START_GOT, any special meaning for the value 32768?
>> .LCTOC1=.+32768

3) Syntax for GOT_ENTRY(NAME) and GOT(NAME), like . - .LCTOC1 (line 57) and .text 2 (line 50)
could not find then in the GNU douments (ld, as, gcc, glibc etc).

Thanks for the help!!