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Annotation of coherent/d/bin/load/Changes, revision 1.1

1.1     ! root        1: /usr/src/ld/Changes 1/25/90
        !             2: 
        !             3: Thu Jan 25 15:26:27 1990 PST
        !             4: pass2.c
        !             5:        Executables built by the Inetco loader fail with a segmentation
        !             6:        violation when one of the linked objects ends with an odd-sized
        !             7:        segment.  Because relocation and symbol segments follow the
        !             8:        code and data segments, this happens only when a module contains
        !             9:        no external symbols and defines an odd-sized last segment.
        !            10:        For the source foo.c module containing the single line
        !            11:                static char c[] = "12";
        !            12:        cc creates an object foo.o with PRVD segment of size 4 (not 3),
        !            13:        but it writes only the 3 data bytes '1', '2', '\0' to it.
        !            14:        Since no BSS, symbol or relocation segments follow, the object ends
        !            15:        after the '\0'.  Similary for a source
        !            16:                static f() { int i; i++ }
        !            17:        which creates a PRVI segment of length 16 with 15 data bytes.
        !            18:        This bug could be fixed either in the compiler output writer
        !            19:        n2/i8086/outcoh.c or in the loader.  I choose the latter approach,
        !            20:        changing the code which copies segments in pass2.c.  In the process,
        !            21:        I made the code vastly more efficient.
        !            22: Makefile
        !            23:        In CFLAGS, changed -DBREADBOX=$BREADBOX to -DBREADBOX=$(BREADBOX).
        !            24:        The old version was a mistake which produced -DBREADBOX=READBOX
        !            25:        during compilations rather than -DBREADBOX=16384.
        !            26: 
        !            27: Thu Mar 29 10:35:01 1990 PST
        !            28: main.c
        !            29:        Removed RCS statics (including Inetco copyright) and recompiled.

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