usr/src/old/dlmpcc/scnhdr.h

/*      scnhdr.h        5.1     87/11/15        */
/*      @(#)scnhdr.h    2.2 12/15/82    */

struct scnhdr {
        char            s_name[8];      /* section name */
        long            s_paddr;        /* physical address */
        long            s_vaddr;        /* virtual address */
        long            s_size;         /* section size */
        long            s_scnptr;       /* file ptr to raw data for section */
        long            s_relptr;       /* file ptr to relocation */
        long            s_lnnoptr;      /* file ptr to line numbers */
        unsigned short  s_nreloc;       /* number of relocation entries */
        unsigned short  s_nlnno;        /* number of line number entries */
        long            s_flags;        /* flags */
        };

#define SCNHDR  struct scnhdr
#define SCNHSZ  sizeof(SCNHDR)


/*
 * Define constants for names of "special" sections
 */

#define _TEXT ".text"
#define _DATA ".data"
#define _BSS  ".bss"
#define _TV  ".tv"


/*
 * The low 4 bits of s_flags is used as a section "type"
 */

#define STYP_REG        0x00            /* "regular" section:
                                                allocated, relocated, loaded */
#define STYP_DSECT      0x01            /* "dummy" section:
                                                not allocated, relocated,
                                                not loaded */
#define STYP_NOLOAD     0x02            /* "noload" section:
                                                allocated, relocated,
                                                 not loaded */
#define STYP_GROUP      0x04            /* "grouped" section:
                                                formed of input sections */
#define STYP_PAD        0x08            /* "padding" section:
                                                not allocated, not relocated,
                                                 loaded */
#define STYP_COPY       0x10            /* "copy" section:
                                                for decision function used
                                                by field update;  not
                                                allocated, not relocated,
                                                loaded;  reloc & lineno
                                                entries processed normally */
#define STYP_TEXT       0x20            /* section contains text only */
#define STYP_DATA       0x40            /* section contains data only */
#define STYP_BSS        0x80            /* section contains bss only */

/*
 *  In a minimal file or an update file, a new function
 *  (as compared with a replaced function) is indicated by S_NEWFCN
 */

#define S_NEWFCN  0x10

/*
 * In 3b Update Files (output of ogen), sections which appear in SHARED
 * segments of the Pfile will have the S_SHRSEG flag set by ogen, to inform
 * dufr that updating 1 copy of the proc. will update all process invocations.
 */

#define S_SHRSEG        0x20