[Bug gas/2539] avr-as generates wrong opcode for call/jmp with lables

[nickc at redhat dot com]

------- Additional Comments From nickc at redhat dot com  2006-04-13 09:15 
-------
Hi Mack,

  This is not a bug, but a feature.  The AVR assembler has chosen to use a reloc
with the JMP instruction, so the actual address is not resolved until link time.
 If you disassemble the object file with -Dr instead of -D you will see:

  00000000 <main-0x46>:
   0:   0c 94 00 00     jmp     0       ; 0x0 <main-0x46>
                        0: R_AVR_CALL   .text+0x46
  
etc.  The reason for this is that the JMP instruction takes an absolute address
as its operand, and this address cannot be known until the linker has assigned a
location to the .text section.

The RJMP and RCALL instructions on the other hand take PC-relative operands, so
their values can be computed by the assembler at assembly time.  Hence these two
instructions do not generate relocs.

Cheers
  Nick


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID


http://sourceware.org/bugzilla/show_bug.cgi?id=2539

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