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CGT 7.3.2: minimal RTS?

  • Ram R
    Posted by
    on Mar 26 2012 18:53 PM
    Intellectual390 points

    Hello compiler/c-library experts

    Here is our setup:

    • device: C6424
    • CCS  Version: 4.2.4.00033
    • xdctools_3_23_00_32
    • C6000 Code Generation Tools 7.3.2
    • For legacy reasons we are still building for COFF-ABI
    • All code is compiled as C++ (.cpp extension) with minimal C++ constructs - even if instances of "utility objects" exist, they are stack-local...

    I'm implementing a bootloader (bare metal, no SYS/BIOS) which is part of a 2-stage chain-load process... and space (internal memory) is at a premium...

    Is there a way to shed unused RTS baggage?

    Also the following options do not seem to make a difference (unless I''m making a mistake...)

    • --printf_support=minimal
    • --disable_auto_rts

    I also found an older thread on the forum: http://e2e.ti.com/support/development_tools/compiler/f/343/t/55673.aspx#199742

    But, I could not get much out of it...

    -ram

    --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

    Linker Cmd File:

    --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

    -c
    -heap  0x1000
    -stack 0x1000

    /* Memory Map: 48-kB */
    MEMORY
    {
        BOOT:        o = 0x10800000   l = 0x00000060
        L2_RAM:      o = 0x10800060   l = 0x0000BFA0
    }

    SECTIONS
    {
        boot > BOOT
        {
            -lrts64plus.lib<boot.obj>  (.text)
        }
        .text > L2_RAM
        {
            * (.text)
        }
        .stack  > L2_RAM
        .bss    > L2_RAM
        .cinit  > L2_RAM
        .pinit  > L2_RAM
        .cio    > L2_RAM
        .const  > L2_RAM
        .data   > L2_RAM
        .switch > L2_RAM
        .sysmem > L2_RAM
        .far    > L2_RAM
    }

    --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

    Output Map

    --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

    ******************************************************************************
                   TMS320C6x Linker PC v7.3.2                      
    ******************************************************************************
    >> Linked Mon Mar 26 16:33:43 2012

    OUTPUT FILE NAME:   <--- deleted --->
    ENTRY POINT SYMBOL: "_c_int00"  address: 10800000


    MEMORY CONFIGURATION

             name            origin    length      used     unused   attr    fill
    ----------------------  --------  ---------  --------  --------  ----  --------
      BOOT                  10800000   00000060  00000060  00000000  RWIX
      L2_RAM                10800060   0000bfa0  00009db0  000021f0  RWIX


    SECTION ALLOCATION MAP

     output                                  attributes/
    section   page    origin      length       input sections
    --------  ----  ----------  ----------   ----------------
    .pinit     0    10800060    00000000     UNINITIALIZED

    boot       0    10800000    00000060     
                      10800000    00000060     rts64plus.lib : boot.obj (.text:_c_int00)

    .text      0    10800060    00007140     
                      10800060    00000880     main.obj (.text)
                      108008e0    00000580     rts64plus.lib : _printfi.obj (.text:__getarg_diouxp)
                      10800e60    00000540                   : divd.obj (.text:__divd)
                      108013a0    00000480                   : _printfi.obj (.text:__setfield)
                      10801820    00000440                   : _printfi.obj (.text:__printfi)
                      10801c60    00000300                   : _printfi.obj (.text:_ecvt)
                      10801f60    00000300                   : _printfi.obj (.text:_fcvt)
                      10802260    00000300                   : fputs.obj (.text:_fputs)
                      10802560    000002e0                   : _printfi.obj (.text:__pproc_fge)
                      10802840    000002c0                   : _printfi.obj (.text:__pproc_fwp)
                      10802b00    000002a0                   : _printfi.obj (.text:__pconv_e)
                      10802da0    00000280                   : memory.obj (.text:_free)
                      10803020    00000260                   : imath64.obj (.text:__divull)
                      10803280    00000260                   : mpyd.obj (.text:__mpyd)
                      108034e0    00000240                   : _printfi.obj (.text:__pproc_diouxp)
                      10803720    00000220                   : _printfi.obj (.text:__pproc_str)
                      10803940    00000200                   : addd.obj (.text:__addd)
                      10803b40    00000200                   : frcaddd.obj (.text:__frcaddd)
                      10803d40    00000200                   : _printfi.obj (.text:__pconv_g)
                      10803f40    000001c0                   : _printfi.obj (.text:__mcpy)
                      10804100    000001a0                   : imath40.obj (.text:__divul)
                      108042a0    00000180                   : trgdrv.obj (.text:_HOSTrename)
                      10804420    00000180                   : memory.obj (.text:_malloc)
                      108045a0    00000180                   : setvbuf.obj (.text:_setvbuf)
                      10804720    00000180     libdevices.a : gpio_simple.obj (.text)
                      108048a0    00000140     rts64plus.lib : fputc.obj (.text:_fputc)
                      108049e0    00000140                   : lowlev.obj (.text:_getdevice)
                      10804b20    00000120                   : _printfi.obj (.text:__pproc_fflags)
                      10804c40    00000120                   : fclose.obj (.text:_fclose)
                      10804d60    00000100                   : trgdrv.obj (.text:_HOSTlseek)
                      10804e60    00000100                   : autoinit.obj (.text:__auto_init)
                      10804f60    00000100                   : frcmpyd.obj (.text:__frcmpyd)
                      10805060    00000100                   : _printfi.obj (.text:__ltostr)
                      10805160    00000100                   : _io_perm.obj (.text:__wrt_ok)
                      10805260    00000100                   : fflush.obj (.text:_fflush)
                      10805360    00000100     libdevices.a : led.obj (.text)
                      10805460    000000e0     rts64plus.lib : trgdrv.obj (.text:_HOSTopen)
                      10805540    000000e0                   : cmpd.obj (.text:__cmpd)
                      10805620    000000e0                   : atoi.obj (.text:_atoi)
                      10805700    000000e0                   : lowlev.obj (.text:_close)
                      108057e0    000000e0                   : exit.obj (.text:_exit)
                      108058c0    000000e0                   : memset.obj (.text:_memset)
                      108059a0    000000c0                   : trgdrv.obj (.text:_HOSTread)
                      10805a60    000000c0                   : trgdrv.obj (.text:_HOSTunlink)
                      10805b20    000000c0                   : trgdrv.obj (.text:_HOSTwrite)
                      10805be0    000000c0                   : fopen.obj (.text:__cleanup)
                      10805ca0    000000c0                   : _printfi.obj (.text:__div)
                      10805d60    000000c0                   : divu.obj (.text:__divu)
                      10805e20    000000c0                   : fflush.obj (.text:__doflush)
                      10805ee0    000000c0                   : fseek.obj (.text:_fseek)
                      10805fa0    000000c0                   : lowlev.obj (.text:_lseek)
                      10806060    000000c0                   : ltoa.obj (.text:_ltoa)
                      10806120    000000c0                   : lowlev.obj (.text:_write)
                      108061e0    000000a0                   : trgdrv.obj (.text:_HOSTclose)
                      10806280    000000a0                   : new_.obj (.text:___nw__FUi)
                      10806320    000000a0                   : imath40.obj (.text:__divli)
                      108063c0    000000a0                   : _printfi.obj (.text:__ecpy)
                      10806460    000000a0                   : _printfi.obj (.text:__fcpy)
                      10806500    000000a0                   : fixdli.obj (.text:__fixdli)
                      108065a0    000000a0                   : _printfi.obj (.text:__pconv_f)
                      10806640    000000a0                   : cpy_tbl.obj (.text:_copy_in)
                      108066e0    000000a0                   : lowlev.obj (.text:_finddevice)
                      10806780    000000a0                   : memcpy64.obj (.text:_memcpy)
                      10806820    000000a0                   : memory.obj (.text:_minsert)
                      108068c0    000000a0                   : memory.obj (.text:_mremove)
                      10806960    00000080                   : fixdi.obj (.text:__fixdi)
                      108069e0    00000080                   : fltlid.obj (.text:__fltlid)
                      10806a60    00000080                   : llshift.obj (.text:__llshl)
                      10806ae0    00000080                   : renormd.obj (.text:__renormd)
                      10806b60    00000080                   : fprintf.obj (.text:_fprintf)
                      10806be0    00000080                   : trgmsg.obj (.text:_readmsg)
                      10806c60    00000080                   : lowlev.obj (.text:_unlink)
                      10806ce0    00000060                   : assert.obj (.text:__abort_msg)
                      10806d40    00000060                   : imath64.obj (.text:__subcull)
                      10806da0    00000060                   : memccpy.obj (.text:_memccpy)
                      10806e00    00000060                   : trgmsg.obj (.text:_writemsg)
                      10806e60    00000040                   : isinf.obj (.text:___isinf)
                      10806ea0    00000040                   : _printfi.obj (.text:___isnan)
                      10806ee0    00000040                   : args_main.obj (.text:__args_main)
                      10806f20    00000040                   : frcmpyd_div.obj (.text:__frcmpyd_div)
                      10806f60    00000040                   : llshift.obj (.text:__llshru)
                      10806fa0    00000040                   : negd.obj (.text:__negd)
                      10806fe0    00000040                   : imath40.obj (.text:__remli)
                      10807020    00000040                   : subd.obj (.text:__subd)
                      10807060    00000020                   : newhandler.obj (.text:___default_new_handler__Fv)
                      10807080    00000020                   : delete.obj (.text:___dl__FPv)
                      108070a0    00000020                   : array_del.obj (.text:___dla__FPv)
                      108070c0    00000020                   : array_new.obj (.text:___nwa__FUi)
                      108070e0    00000020                   : negll.obj (.text:__negll)
                      10807100    00000020                   : _lock.obj (.text:__nop)
                      10807120    00000020                   : fprintf.obj (.text:__outc)
                      10807140    00000020                   : fprintf.obj (.text:__outs)
                      10807160    00000020                   : exit.obj (.text:_abort)
                      10807180    00000020                   : remove.obj (.text:_remove)

    .bss       0    10800060    00000000     UNINITIALIZED

    .data      0    10800060    00000000     UNINITIALIZED

    .stack     0    108071a0    00001000     UNINITIALIZED
                      108071a0    00000008     rts64plus.lib : boot.obj (.stack)
                      108071a8    00000ff8     --HOLE--

    .sysmem    0    108081a0    00001000     UNINITIALIZED
                      108081a0    00000008     rts64plus.lib : memory.obj (.sysmem)
                      108081a8    00000ff8     --HOLE--

    .far       0    108091a0    00000534     UNINITIALIZED
                      108091a0    00000324     rts64plus.lib : defs.obj (.far)
                      108094c4    00000004                   : fopen.obj (.far)
                      108094c8    0000011c                   : lowlev.obj (.far)
                      108095e4    00000004                   : vars.obj (.far)
                      108095e8    000000d0                   : trgdrv.obj (.far)
                      108096b8    0000000c                   : exit.obj (.far)
                      108096c4    00000008                   : _lock.obj (.far)
                      108096cc    00000008                   : memory.obj (.far)

    .const     0    108096d8    000004b8     
                      108096d8    00000300     main.obj (.const:.string)
                      108099d8    00000101     rts64plus.lib : ctype.obj (.const:__ctypes_)
                      10809ad9    00000003                   : assert.obj (.const:.string)
                      10809adc    00000084     libdevices.a : led.obj (.const:.string)
                      10809b60    00000023     rts64plus.lib : _printfi.obj (.const:.string)
                      10809b83    00000002                   : fputs.obj (.const:.string)
                      10809b85    00000003     --HOLE-- [fill = 0]
                      10809b88    00000008                   : divd.obj (.const:_initial_approx$1)

    .cinit     0    10809b90    00000164     
                      10809b90    0000005c     rts64plus.lib : defs.obj (.cinit)
                      10809bec    00000004     --HOLE-- [fill = 0]
                      10809bf0    0000005c                   : lowlev.obj (.cinit)
                      10809c4c    00000004     --HOLE-- [fill = 0]
                      10809c50    0000002c                   : exit.obj (.cinit)
                      10809c7c    00000004     --HOLE-- [fill = 0]
                      10809c80    0000002c                   : memory.obj (.cinit)
                      10809cac    00000004     --HOLE-- [fill = 0]
                      10809cb0    0000001c                   : _lock.obj (.cinit)
                      10809ccc    00000004     --HOLE-- [fill = 0]
                      10809cd0    0000000c                   : fopen.obj (.cinit)
                      10809cdc    00000004     --HOLE-- [fill = 0]
                      10809ce0    0000000c                   : vars.obj (.cinit)
                      10809cec    00000004     --HOLE-- [fill = 0]
                      10809cf0    00000004     (.pad.cinit) [fill = 0]

    .cio       0    10809cf4    00000120     UNINITIALIZED
                      10809cf4    00000120     rts64plus.lib : trgmsg.obj (.cio)


    GLOBAL SYMBOLS: SORTED ALPHABETICALLY BY Name

    address    name
    --------   ----
    10800060   $bss
    10800060   .bss
    10800060   .data
    10800060   .text
    10807160   C$$EXIT
    10806e58   C$$IO$$
    10804844   _GpioMgr_getPinVal__F10Gpio_PinId
    10804720   _GpioMgr_setPinDir__F10Gpio_PinId14Gpio_Direction
    108047d0   _GpioMgr_setPinVal__F10Gpio_PinId13Gpio_PinValue
    108061e0   _HOSTclose
    10804d60   _HOSTlseek
    10805460   _HOSTopen
    108059a0   _HOSTread
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    10809cf4   __CIOBUF_
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    00001000   __STACK_SIZE
    00001000   __SYSMEM_SIZE
    00000001   __TI_args_main
    108096c0   ___TI_enable_exit_profile_output
    ffffffff   ___TI_pprof_out_hndl
    ffffffff   ___TI_prof_data_size
    ffffffff   ___TI_prof_data_start
    ffffffff   ___binit__
    10800060   ___bss__
    ffffffff   ___c_args__
    10809b90   ___cinit__
    10800060   ___data__
    10807060   ___default_new_handler__Fv
    10807080   ___dl__FPv
    108070a0   ___dla__FPv
    10800060   ___edata__
    10800060   ___end__
    108071a0   ___etext__
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    ffffffff   ___pinit__
    10800060   ___text__
    10806ce0   __abort_msg
    10803940   __addd
    10806ee0   __args_main
    10804e60   __auto_init
    10805d60   __c6xabi_divu
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    10806f20   __frcmpyd_div
    108094c0   __ft_end
    108091a0   __ftable
    10806a60   __llshl
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    108096c4   __lock
    10803280   __mpyd
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    10807100   __nop
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    108081a0   __sys_memory
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    10805620   _atoi
    10805360   _bootstrap__3LedSFv
    10800000   _c_int00
    10805700   _close
    10806640   _copy_in
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    10806060   _ltoa
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    108045a0   _setvbuf
    10806c60   _unlink
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    ffffffff   binit
    10809b90   cinit
    10800060   edata
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    108071a0   etext
    ffffffff   pinit


    GLOBAL SYMBOLS: SORTED BY Symbol Address

    address    name
    --------   ----
    00000001   __TI_args_main
    00001000   __STACK_SIZE
    00001000   __SYSMEM_SIZE
    10800000   _c_int00
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    108008ac   _main
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    10804720   _GpioMgr_setPinDir__F10Gpio_PinId14Gpio_Direction
    108047d0   _GpioMgr_setPinVal__F10Gpio_PinId13Gpio_PinValue
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    108048a0   _fputc
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    10804d60   _HOSTlseek
    10804e60   __auto_init
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    108053e0   _set__3LedSFUib
    10805460   _HOSTopen
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    108058c0   _memset
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    10806060   _ltoa
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    10806280   ___nw__FUi
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    10806960   __fixdi
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    10806e60   ___isinf
    10806ee0   __args_main
    10806f20   __frcmpyd_div
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    108099d8   __ctypes_
    10809b90   ___cinit__
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    10809cf4   __CIOBUF_
    ffffffff   ___TI_pprof_out_hndl
    ffffffff   ___TI_prof_data_size
    ffffffff   ___TI_prof_data_start
    ffffffff   ___binit__
    ffffffff   ___c_args__
    ffffffff   ___pinit__
    ffffffff   binit
    ffffffff   pinit

    [118 symbols]


    --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

    Report Abuse
  • AartiG
    Posted by
    on Mar 27 2012 10:39 AM
    Guru69035 points

    Ram,

    By default the linker will only pull in functions from the runtime library that are "referenced". You may not be calling all the runtime functions listed in the link map file directly, but even if you call one, that one in turn can call other functions, which would then also get linked in.

    If a post answers your question please mark it with the "Verify Answer" button

    Search the wikis for common questions: CGT, BIOS,  CCSv3, CCSv4
    Track a known bug with SDOWP. Enter the bug id in the "Find Record ID" box

    Report Abuse
  • Archaeologist
    Posted by
    on Mar 27 2012 11:09 AM
    Mastermind40810 points

    Ram R
    --disable_auto_rts

    That option has nothing to do with library size.  You probably should not use it.

    I see that the linker map file shows that some part of the program calls new.  I think that deep in the implementation of new, there is a call to printf for an exceptional condition.   This call will cause the bulk of the C I/O support to be dragged in, and it's a lot.  This is a the subject of another thread, but I can't quickly find it.  I don't recall what the resolution of that thread was, or if there was an enhancement report submitted against it.  I'll see if I can dig it up.  You might want to try checking the compiler's assembly ouput for your function to verify there are calls to operator new.  You may need to pass it through dem6x to be able to identify the mangled name of operator new.

    c++ C++ standard RTS library array new/delete code size
    Report Abuse
  • Archaeologist
    Posted by
    on Mar 27 2012 11:21 AM
    Mastermind40810 points

    Ram R
    I also found an older thread on the forum: http://e2e.ti.com/support/development_tools/compiler/f/343/t/55673.aspx#199742

    That is indeed the thread I was thinking of.  Nothing was done on the compiler side because we could not reproduce the problem.

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