MPC85xx u-boot definition

[enorm]

Hi,
  Some naive questions about u-boot for MPC85xx,  the definition of 
some macro in ppc_asm.tmpl. Can anyone there explain them to me please? 

 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!! 

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