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Index > Compiler Internals > "invalid use of symbol" v1.71.05

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yoshimitsu



Joined: 07 Jul 2011
Posts: 96
yoshimitsu
Hello,
I got some problems with the error mentioned in the title when having relocations generated.
With version 1.69.52 the following code still worked:
Code:
format PE GUI
entry start

include 'win32a.inc'

section '.code' code readable executable

  start:
        lea     eax,[data_stuff-start]          ; works
        lea     eax,[data_stuff-.other_label]   ; works
        add     eax,data_stuff-start            ; works
  .other_label:
        push    0
        call    [ExitProcess]

  data_stuff:

section '.data' data readable writeable

  rd 1

section '.idata' import data readable

  library kernel32,'KERNEL32.DLL'

  import kernel32,\
         ExitProcess,'ExitProcess'

section '.reloc' fixups data readable discardable    


with version 1.71.05 it looks like this:
Code:
        lea     eax,[data_stuff-start]          ; invalid use of symbol
        lea     eax,[data_stuff-.other_label]   ; works
        add     eax,data_stuff-start            ; works    


And another question regarding relocatable addresses:
is a virtual-directive evaluated directly or when used?
because since v1.71.02 the difference between two relocatable addresses can be calculated by first subtracting, then adding, so I tried the following which sadly doesn't work:
Code:
  start:
        virtual at eax-data_stuff               ; invalid use of symbol
        .x:
        end virtual

        lea eax,[.x+.other_label]

  .other_label:
        push    0
        call    [ExitProcess]

  data_stuff:    
Post 22 Nov 2012, 10:17
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Tomasz Grysztar
Assembly Artist


Joined: 16 Jun 2003
Posts: 7721
Location: Kraków, Poland
Tomasz Grysztar
Thank you reporting. I have prepared 1.71.06 release which addresses both issues.
Post 22 Nov 2012, 11:36
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