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Annotation of researchv9/jerq/sgs/strip/checkflags.c, revision 1.1

1.1     ! root        1: /* UNIX HEADER */
        !             2: #include       <stdio.h>
        !             3: 
        !             4: /* COMMON SGS HEADERS */
        !             5: #include       "filehdr.h"
        !             6: #include       "ldfcn.h"
        !             7: 
        !             8: 
        !             9:     /*  checkflags(filename, &filehead)
        !            10:      *
        !            11:      *  checks and sets object file header flags appropriately
        !            12:      *
        !            13:      *  checkflags returns SUCCESS or FAILURE
        !            14:      *
        !            15:      *  checkflags will FAIL (and strip won't strip) in the following cases:
        !            16:      *  if there is no symbol table (strip announces the fact if lflag, xflag
        !            17:      *  or bflag imply that symbols were expected)
        !            18:      *  if lflag, xflag or bflag is ON and there are no local symbols 
        !            19:      *  if lflag is OFF and there are relocation entries 
        !            20:      *
        !            21:      *  the file flags in the file header are set to reflect the new state of
        !            22:      *  of the file:
        !            23:      *  if xflag, bflag and lflag are all OFF there will be no symbols nor any
        !            24:      *  line numbers in the file
        !            25:      *  if xflag is ON then there will be no local symbols nor any line numbers
        !            26:      *  if bflag is ON then there will be no local symbols except .bb, .eb, .bf
        !            27:      *  and .ef
        !            28:      *  if lflag is ON then there will be no line numbers
        !            29:      */
        !            30: 
        !            31: 
        !            32: int
        !            33: checkflags(filename, filehead)
        !            34: 
        !            35: char   *filename;
        !            36: FILHDR *filehead;
        !            37: 
        !            38: {
        !            39:     /* STRIP FUNCTION CALLED */
        !            40:     extern             error( );
        !            41: 
        !            42:     /* EXTERNAL VARIABLES USED */
        !            43:     extern LDFILE      *ldptr;
        !            44:     extern int         lflag,
        !            45:                        xflag,
        !            46:                        bflag,
        !            47:                        sflag,
        !            48:                        rflag;
        !            49:        extern int      fflag;
        !            50: 
        !            51:     /* LOCAL VARIABLE */
        !            52:     unsigned short     filflags;
        !            53: 
        !            54:     if (filehead->f_nsyms == 0L) {
        !            55:        if (lflag || xflag || bflag || rflag || sflag || fflag ) {
        !            56:            error(filename, "no symbol table", 1);
        !            57:           onintr();
        !            58:        }
        !            59:        return(FAILURE);
        !            60: 
        !            61:     } else if (!(lflag || xflag || bflag || rflag || sflag || fflag)) {
        !            62:        filehead->f_nsyms = 0L;
        !            63:     }
        !            64: 
        !            65:     filflags = filehead->f_flags;
        !            66: 
        !            67:     if (sflag && (filflags & F_LSYMS) != 0)
        !            68:     {
        !            69:            error(filename, "no local symbols", 1);
        !            70:            return(FAILURE);
        !            71:     }
        !            72: 
        !            73:        if (((!rflag) && (!fflag) && (!lflag)) && (filflags & F_RELFLG) == 0) {
        !            74:            error(filename, "relocation entries; cannot strip", 1);
        !            75:            return(FAILURE);
        !            76:        }
        !            77: 
        !            78: #if !UNIX
        !            79:        if (fflag && !(filflags & F_EXEC)) {
        !            80:                error( filename, "not executable, cannot strip", 1);
        !            81:                return( FAILURE );
        !            82:        }
        !            83: #endif
        !            84: 
        !            85:     return(SUCCESS);
        !            86: }
        !            87: /*
        !            88:  *     @(#)checkflags.c        1.6 11/4/83;
        !            89:  */

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