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Problem in generating position independent code with out TEXTREL

Darisi V SATISH BABU
Note: This was originally posted on 12th August 2010 at http://forums.arm.com

Hi Experts,

Issue:Not able to remove TEXTREL from our static library generated with --apcs /fpic option using armcc(RVCT 4.0 build 771  tool chain)

Description:
    We compiled our codebase(some modules with handwritten assembly) using armcc(RVCT 4.0 build 771  tool chain) to get static libraries, and then these are used by gstreamer module which further compiles using the above generated libraries with wrappers using GCC tool chain and creates shared objects(.so).

Even though we use equivalent --apcs /fpic compile time option during static library creation to remove position independent code, the TEXTREL are not going from library.
When we disable the (handwritten assembly) in the above mentioned codebase, TEXTRELs go away.
As there are lot of handwritten ARM assembly functions,its difficult to enable one by one and compile and check. :unsure:

So,Experts please throw some light on this issue.


Thanks In Advance,
satish
Parents
  • Note: This was originally posted on 3rd January 2011 at http://forums.arm.com

    Hi Experts,


        I was able te resolve the TEXTREL issues(by avoiding functions calls using LDR and DCD/DCW...for data) in some code bases with the solutions provided by Scott & others............
    Now i am working on some other code base where i am facing TEXTREL issues due to access of tables.
    Please go through the below mentioned sample program which replicates my issues.........

    short int table[30] = {1,2,3,4,5,.......,30};

    void foo {
      
          ...
            LDR r0,=foo
    or
            DCD foo
            ...
    }
Reply
  • Note: This was originally posted on 3rd January 2011 at http://forums.arm.com

    Hi Experts,


        I was able te resolve the TEXTREL issues(by avoiding functions calls using LDR and DCD/DCW...for data) in some code bases with the solutions provided by Scott & others............
    Now i am working on some other code base where i am facing TEXTREL issues due to access of tables.
    Please go through the below mentioned sample program which replicates my issues.........

    short int table[30] = {1,2,3,4,5,.......,30};

    void foo {
      
          ...
            LDR r0,=foo
    or
            DCD foo
            ...
    }
Children
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