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EXTRN CODE ( FUNCTION ) gives L16 if FUNCTION is BIT

Douglas Hewett

uvision 2 v2.40, c51 v7.09, bl51 v5.03 gives:

*** WARNING L16: UNCALLED SEGMENT, IGNORED FOR OVERLAY PROCESS
SEGMENT: ?PR?IS_OK_INC_DTARGET_SPD?SPDLIM

spdlim.c has
bit IS_OK_INC_DTARGET_SPD( void )
which returns a bit.

(1) how do I fix this?

Parents
  • 0 in reply to Andy Neil

    Created main.c, cf.c, af.a51 for project. The following paste does not show main's call to af(). This simple example still shows the linker warning.

    // cf.c
bit cf( void );
bit cf( void )
{
bit retval;
  retval = 1;
  return ( retval );
}


    ;; af.a51
CS SEGMENT CODE
   RSEG    CS
extrn code ( cf )
public af
af:
  call    cf
  ret
END

    I edited the map for space and pasted it below:

    BL51 BANKED LINKER/LOCATER V5.03 04/08/2004 14:01:08 PAGE 1

    BL51 BANKED LINKER/LOCATER V5.03, INVOKED BY:
    C:\KEILC51\C51\BIN\BL51.EXE STARTUP.obj,
    bitmain.obj,
    af.obj,
    cf.obj
    TO bitbug IXREF RAMSIZE (256)

    MEMORY MODEL: SMALL

    INPUT MODULES INCLUDED:
    STARTUP.obj (?C_STARTUP)
    bitmain.obj (BITMAIN)
    af.obj (AF)
    cf.obj (CF)

    LINK MAP OF MODULE: bitbug (?C_STARTUP)

    TYPE BASE LENGTH RELOCATION SEGMENT NAME
    -----------------------------------------------------

    * * * * * * * D A T A M E M O R Y * * * * * * *
    REG 0000H 0008H ABSOLUTE "REG BANK 0"
    0008H 0018H *** GAP ***
    BIT 0020H.0 0000H.1 UNIT ?BI?CF?CF
    0020H.1 0000H.7 *** GAP ***
    IDATA 0021H 0001H UNIT ?STACK

    * * * * * * * C O D E M E M O R Y * * * * * * *
    CODE 0000H 0003H ABSOLUTE
    CODE 0003H 000CH UNIT ?C_C51STARTUP
    CODE 000FH 0005H UNIT ?PR?CF?CF
    CODE 0014H 0004H UNIT CS
    CODE 0018H 0003H UNIT ?PR?MAIN?BITMAIN

    NAME . . . . USAGE MODULE NAMES
    ----------------------------------

    ?C_START . . CODE; ** L51 GENERATED ** ?C_STARTUP
    ?C_STARTUP . CODE; ?C_STARTUP BITMAIN
    AF . . . . . CODE; AF BITMAIN
    CF . . . . . CODE; CF AF
    MAIN . . . . CODE; BITMAIN

    *** WARNING L16: UNCALLED SEGMENT, IGNORED FOR OVERLAY PROCESS
    SEGMENT: ?PR?CF?CF

    Program Size: data=9.1 xdata=0 code=27
    LINK/LOCATE RUN COMPLETE. 1 WARNING(S), 0 ERROR(S)

Reply
  • 0 in reply to Andy Neil

    Created main.c, cf.c, af.a51 for project. The following paste does not show main's call to af(). This simple example still shows the linker warning.

    // cf.c
bit cf( void );
bit cf( void )
{
bit retval;
  retval = 1;
  return ( retval );
}


    ;; af.a51
CS SEGMENT CODE
   RSEG    CS
extrn code ( cf )
public af
af:
  call    cf
  ret
END

    I edited the map for space and pasted it below:

    BL51 BANKED LINKER/LOCATER V5.03 04/08/2004 14:01:08 PAGE 1

    BL51 BANKED LINKER/LOCATER V5.03, INVOKED BY:
    C:\KEILC51\C51\BIN\BL51.EXE STARTUP.obj,
    bitmain.obj,
    af.obj,
    cf.obj
    TO bitbug IXREF RAMSIZE (256)

    MEMORY MODEL: SMALL

    INPUT MODULES INCLUDED:
    STARTUP.obj (?C_STARTUP)
    bitmain.obj (BITMAIN)
    af.obj (AF)
    cf.obj (CF)

    LINK MAP OF MODULE: bitbug (?C_STARTUP)

    TYPE BASE LENGTH RELOCATION SEGMENT NAME
    -----------------------------------------------------

    * * * * * * * D A T A M E M O R Y * * * * * * *
    REG 0000H 0008H ABSOLUTE "REG BANK 0"
    0008H 0018H *** GAP ***
    BIT 0020H.0 0000H.1 UNIT ?BI?CF?CF
    0020H.1 0000H.7 *** GAP ***
    IDATA 0021H 0001H UNIT ?STACK

    * * * * * * * C O D E M E M O R Y * * * * * * *
    CODE 0000H 0003H ABSOLUTE
    CODE 0003H 000CH UNIT ?C_C51STARTUP
    CODE 000FH 0005H UNIT ?PR?CF?CF
    CODE 0014H 0004H UNIT CS
    CODE 0018H 0003H UNIT ?PR?MAIN?BITMAIN

    NAME . . . . USAGE MODULE NAMES
    ----------------------------------

    ?C_START . . CODE; ** L51 GENERATED ** ?C_STARTUP
    ?C_STARTUP . CODE; ?C_STARTUP BITMAIN
    AF . . . . . CODE; AF BITMAIN
    CF . . . . . CODE; CF AF
    MAIN . . . . CODE; BITMAIN

    *** WARNING L16: UNCALLED SEGMENT, IGNORED FOR OVERLAY PROCESS
    SEGMENT: ?PR?CF?CF

    Program Size: data=9.1 xdata=0 code=27
    LINK/LOCATE RUN COMPLETE. 1 WARNING(S), 0 ERROR(S)

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