mips multi-got error

[David Daney]

Thiemo Seufer wrote:
> David Daney wrote:
> [snip]
> 
>>That is not supposed to work.  Multi-got linking only works if there are 
>>fewer than 8192 symbols per compilation unit (input .o to the linker). 
>>See the multi-got-1 testcase in ld/testsuite/ld-mips-elf.
>>
>>If you need more than 8192 symbols per compilation unit you must use 
>>-xgot for the assembler.  Recent GCC versions have a -mxgot option that 
>>does the same thing for GCC.
> 
> 
> Actually, it is supposed to work. :-)  It is also a known deficiency
> in the current assembler/linker implementation.

How?

The gp is set in the function prolog.  If a single function references 
more got/plt entries than can be indexed with a 16 bit offset, wouldn't 
you need to either load the gp before each got access(very inefficient I 
would think) or use a 32 bit offset (somewhat inefficient)?

David Daney.