int rdl_verify(const char *filename)
{
    FILE *fp;
    char buf[257];
    int i;
    int32_t length;
    static char lastverified[256];
    static int lastresult = -1;

    if (lastresult != -1 && !strcmp(filename, lastverified))
        return lastresult;

    fp = fopen(filename, "rb");
    strcpy(lastverified, filename);

    if (!fp)
        return (rdl_error = lastresult = 1);

    while (!feof(fp)) {
        i = 0;

        while (fread(buf + i, 1, 1, fp) == 1 && i < 257 && buf[i])
            i++;
        if (feof(fp))
            break;

        if (buf[0] == '.') {
            /*
             * A special module, eg a signature block or a directory.
             * Format of such a module is defined to be:
             *   six char type identifier
             *   int32_t count bytes content
             *   content
             * so we can handle it uniformaly with RDOFF2 modules.
             */
            nasm_read(buf, 6, fp);
            buf[6] = 0;
            /* Currently, nothing useful to do with signature block.. */
        } else {
            nasm_read(buf, 6, fp);
            buf[6] = 0;
            if (strncmp(buf, "RDOFF", 5)) {
                fclose(fp);
                return rdl_error = lastresult = 2;
            } else if (buf[5] != '2') {
                fclose(fp);
                return rdl_error = lastresult = 3;
            }
        }
        nasm_read(&length, 4, fp);
        fseek(fp, length, SEEK_CUR);    /* skip over the module */
    }
    fclose(fp);
    return lastresult = 0;      /* library in correct format */
}
int rdl_openmodule(struct librarynode *lib, int moduleno, rdffile * f)
{
    char buf[512];
    int i, cmod, t;
    int32_t length;

    lib->referenced++;

    if (!lib->fp) {
        lib->fp = fopen(lib->name, "rb");
        if (!lib->fp) {
            lib->referenced--;
            return (rdl_error = 1);
        }
    } else
        rewind(lib->fp);

    cmod = -1;
    while (!feof(lib->fp)) {
        strcpy(buf, lib->name);
        i = strlen(buf);
        buf[i++] = '.';
        t = i;
        while (fread(buf + i, 1, 1, lib->fp) == 1 && i < 512 && buf[i])
            i++;
        buf[i] = 0;
        if (feof(lib->fp))
            break;

        if (buf[t] != '.')      /* special module - not counted in the numbering */
            cmod++;             /* of RDOFF modules - must be referred to by name */

        if (cmod == moduleno) {
            rdl_error = 16 *
                rdfopenhere(f, lib->fp, &lib->referenced, buf);
            lib->referenced--;
            if (!lib->referenced) {
                fclose(lib->fp);
                lib->fp = NULL;
            }
            return rdl_error;
        }

        nasm_read(buf, 6, lib->fp);
        buf[6] = 0;
        if (buf[t] == '.') {
            /* do nothing */
        } else if (strncmp(buf, "RDOFF", 5)) {
            if (!--lib->referenced) {
                fclose(lib->fp);
                lib->fp = NULL;
            }
            return rdl_error = 2;
        } else if (buf[5] != '2') {
            if (!--lib->referenced) {
                fclose(lib->fp);
                lib->fp = NULL;
            }
            return rdl_error = 3;
        }

        nasm_read(&length, 4, lib->fp);
        fseek(lib->fp, length, SEEK_CUR);       /* skip over the module */
    }
    if (!--lib->referenced) {
        fclose(lib->fp);
        lib->fp = NULL;
    }
    return rdl_error = 4;       /* module not found */
}
Exemple #3
0
static void print_header(int32_t length, int rdf_version)
{
    char buf[129], t, l, s, flags;
    uint8_t reclen;
    int32_t o, ll;
    uint16_t rs;

    while (length > 0) {
        nasm_read(&t, 1, infile);
        if (rdf_version >= 2) {
            nasm_read(&reclen, 1, infile);
        }
        switch (t) {
        case RDFREC_GENERIC:   /* generic record */
            printf("  generic record (length=%d)\n", (int)reclen);
            fseek(infile, reclen, SEEK_CUR);
            break;

        case RDFREC_RELOC:     /* relocation record */
        case RDFREC_SEGRELOC:  /* segment relocation */
            nasm_read(&s, 1, infile);
            nasm_read(&o, 4, infile);
            nasm_read(&l, 1, infile);
            nasm_read(&rs, 2, infile);
            printf("  %s: location (%04x:%08"PRIx32"), length %d, "
                   "referred seg %04x\n",
                   t == 1 ? "relocation" : "seg relocation", (int)s,
                   translateint32_t(o), (int)l, translateint16_t(rs));
            if (rdf_version >= 2 && reclen != 8)
                printf("    warning: reclen != 8\n");
            if (rdf_version == 1)
                length -= 9;
            if (rdf_version == 1 && t == 6)
                printf
                    ("    warning: seg relocation not supported in RDOFF1\n");
            break;

        case RDFREC_IMPORT:    /* import record */
        case RDFREC_FARIMPORT: /* import far symbol */
            nasm_read(&flags, 1, infile);
            nasm_read(&rs, 2, infile);
            ll = 0;

            if (rdf_version == 1) {
                do {
                    nasm_read(&buf[ll], 1, infile);
                } while (buf[ll++]);
            } else {
                for (; ll < reclen - 3; ll++)
                    nasm_read(&buf[ll], 1, infile);
            }

            if (t == 7)
                printf("far ");
            printf((flags & SYM_IMPORT) ? "  import" : "  extern");
            if (flags & SYM_FUNCTION)
                printf(" proc");
            if (flags & SYM_DATA)
                printf(" data");
            printf(": segment %04x = %s\n", translateint16_t(rs), buf);
            if (rdf_version == 1)
                length -= ll + 3;
            if (rdf_version == 1 && t == 7)
                printf
                    ("    warning: far import not supported in RDOFF1\n");
            break;

        case RDFREC_GLOBAL:    /* export record */
            nasm_read(&flags, 1, infile);
            nasm_read(&s, 1, infile);
            nasm_read(&o, 4, infile);
            ll = 0;

            if (rdf_version == 1) {
                do {
                    nasm_read(&buf[ll], 1, infile);
                } while (buf[ll++]);
            } else {
                for (; ll < reclen - 6; ll++)
                    nasm_read(&buf[ll], 1, infile);
            }
            printf((flags & SYM_GLOBAL) ? "  export" : "  public");
            if (flags & SYM_FUNCTION)
                printf(" proc");
            if (flags & SYM_DATA)
                printf(" data");
            printf(": (%04x:%08"PRIx32") = %s\n", (int)s, translateint32_t(o), buf);
            if (rdf_version == 1)
                length -= ll + 6;
            break;

        case RDFREC_DLL:       /* DLL and Module records */
        case RDFREC_MODNAME:
            ll = 0;
            if (rdf_version == 1) {
                do {
                    nasm_read(&buf[ll], 1, infile);
                } while (buf[ll++]);
            } else {
                for (; ll < reclen; ll++)
                    nasm_read(&buf[ll], 1, infile);
            }
            if (t == 4)
                printf("  dll: %s\n", buf);
            else
                printf("  module: %s\n", buf);
            if (rdf_version == 1)
                length -= ll + 1;
            break;

        case RDFREC_BSS:       /* BSS reservation */
            nasm_read(&ll, 4, infile);
            printf("  bss reservation: %08"PRIx32" bytes\n", translateint32_t(ll));
            if (rdf_version == 1)
                length -= 5;
            if (rdf_version > 1 && reclen != 4)
                printf("    warning: reclen != 4\n");
            break;

        case RDFREC_COMMON:{
                uint16_t seg, align;
                uint32_t size;

                nasm_read(&seg, 2, infile);
                nasm_read(&size, 4, infile);
                nasm_read(&align, 2, infile);
                for (ll = 0; ll < reclen - 8; ll++)
                    nasm_read(buf + ll, 1, infile);
                printf("  common: segment %04x = %s, %"PRId32":%d\n",
                       translateint16_t(seg), buf, translateint32_t(size),
                       translateint16_t(align));
                break;
            }

        default:
            printf("  unrecognized record (type %d", (int)t);
            if (rdf_version > 1) {
                printf(", length %d", (int)reclen);
                fseek(infile, reclen, SEEK_CUR);
            } else
                length--;
            printf(")\n");
        }
        if (rdf_version != 1)
            length -= 2 + reclen;
    }
}
int rdl_searchlib(struct librarynode *lib, const char *label, rdffile * f)
{
    char buf[512];
    int i, t;
    void *hdr;
    rdfheaderrec *r;
    int32_t l;

    rdl_error = 0;
    lib->referenced++;

    if (!lib->fp) {
        lib->fp = fopen(lib->name, "rb");

        if (!lib->fp) {
            rdl_error = 1;
            return 0;
        }
    } else
        rewind(lib->fp);

    while (!feof(lib->fp)) {
        /*
         * read the module name from the file, and prepend
         * the library name and '.' to it.
         */
        strcpy(buf, lib->name);

        i = strlen(lib->name);
        buf[i++] = '.';
        t = i;
        while (fread(buf + i, 1, 1, lib->fp) == 1 && i < 512 && buf[i])
            i++;

        buf[i] = 0;

        if (feof(lib->fp))
            break;
        if (!strcmp(buf + t, ".dir")) { /* skip over directory */
            nasm_read(&l, 4, lib->fp);
            fseek(lib->fp, l, SEEK_CUR);
            continue;
        }
        /*
         * open the RDOFF module
         */
        if (rdfopenhere(f, lib->fp, &lib->referenced, buf)) {
            rdl_error = 16 * rdf_errno;
            return 0;
        }
        /*
         * read in the header, and scan for exported symbols
         */
        hdr = nasm_malloc(f->header_len);
        rdfloadseg(f, RDOFF_HEADER, hdr);

        while ((r = rdfgetheaderrec(f))) {
            if (r->type != 3)   /* not an export */
                continue;

            if (!strcmp(r->e.label, label)) {   /* match! */
                nasm_free(hdr);      /* reset to 'just open' */
                f->header_loc = NULL;   /* state... */
                f->header_fp = 0;
                return 1;
            }
        }

        /* find start of next module... */
        i = f->eof_offset;
        rdfclose(f);
        fseek(lib->fp, i, SEEK_SET);
    }

    /*
     * close the file if nobody else is using it
     */
    lib->referenced--;
    if (!lib->referenced) {
        fclose(lib->fp);
        lib->fp = NULL;
    }
    return 0;
}
Exemple #5
0
int main(int argc, char **argv)
{
    char id[7];
    int32_t l;
    uint16_t s;
    int verbose = 0;
    int32_t offset;
    int foundnullsegment = 0;
    int version;
    int32_t segmentcontentlength = 0;
    int nsegments = 0;
    int32_t headerlength = 0;
    int32_t objectlength = 0;

    printf("RDOFF dump utility, version %s\n", PROGRAM_VERSION);
    printf("RDOFF2 revision %s\n", RDOFF2_REVISION);
    puts("Copyright (c) 1996,99 Julian R Hall\n"
         "Improvements and fixes (c) 2002-2004 RET & COM Research.");

    if (argc < 2) {
        fputs("Usage: rdfdump [-v] <filename>\n", stderr);
        exit(1);
    }

    rdoff_init();

    if (!strcmp(argv[1], "-v")) {
        verbose = 1;
        if (argc < 3) {
            fputs("required parameter missing\n", stderr);
            exit(1);
        }
        argv++;
    }

    infile = fopen(argv[1], "rb");
    if (!infile) {
        fprintf(stderr, "rdfdump: Could not open %s\n", argv[1]);
        exit(1);
    }

    nasm_read(id, 6, infile);
    if (strncmp(id, "RDOFF", 5)) {
        fputs("rdfdump: File does not contain valid RDOFF header\n",
              stderr);
        exit(1);
    }

    printf("File %s: RDOFF version %c\n\n", argv[1], id[5]);
    if (id[5] < '1' || id[5] > '2') {
        fprintf(stderr, "rdfdump: unknown RDOFF version '%c'\n", id[5]);
        exit(1);
    }
    version = id[5] - '0';

    if (version > 1) {
        nasm_read(&l, 4, infile);
        objectlength = translateint32_t(l);
        printf("Object content size: %"PRId32" bytes\n", objectlength);
    }

    nasm_read(&l, 4, infile);
    headerlength = translateint32_t(l);
    printf("Header (%"PRId32" bytes):\n", headerlength);
    print_header(headerlength, version);

    if (version == 1) {
        nasm_read(&l, 4, infile);
        l = translateint32_t(l);
        printf("\nText segment length = %"PRId32" bytes\n", l);
        offset = 0;
        while (l--) {
            nasm_read(id, 1, infile);
            if (verbose) {
                if (offset % 16 == 0)
                    printf("\n%08"PRIx32" ", offset);
                printf(" %02x", (int)(uint8_t)id[0]);
                offset++;
            }
        }
        if (verbose)
            printf("\n\n");

        nasm_read(&l, 4, infile);
        l = translateint32_t(l);
        printf("Data segment length = %"PRId32" bytes\n", l);

        if (verbose) {
            offset = 0;
            while (l--) {
                nasm_read(id, 1, infile);
                if (offset % 16 == 0)
                    printf("\n%08"PRIx32" ", offset);
                printf(" %02x", (int)(uint8_t)id[0]);
                offset++;
            }
            printf("\n");
        }
    } else {
        do {
            nasm_read(&s, 2, infile);
            s = translateint16_t(s);
            if (!s) {
                printf("\nNULL segment\n");
                foundnullsegment = 1;
                break;
            }
            printf("\nSegment:\n  Type   = %04X (%s)\n", (int)s,
                   translatesegmenttype(s));
            nsegments++;

            nasm_read(&s, 2, infile);
            printf("  Number = %04X\n", (int)translateint16_t(s));
            nasm_read(&s, 2, infile);
            printf("  Resrvd = %04X\n", (int)translateint16_t(s));
            nasm_read(&l, 4, infile);
            l = translateint32_t(l);
            printf("  Length = %"PRId32" bytes\n", l);
            segmentcontentlength += l;

            offset = 0;
            while (l--) {
                nasm_read(id, 1, infile);
                if (verbose) {
                    if (offset % 16 == 0)
                        printf("\n%08"PRIx32" ", offset);
                    printf(" %02x", (int)(uint8_t)id[0]);
                    offset++;
                }
            }
            if (verbose)
                printf("\n");
        } while (!feof(infile));
        if (!foundnullsegment)
            printf("\nWarning: unexpected end of file - "
                   "NULL segment not found\n");

        printf("\nTotal number of segments: %d\n", nsegments);
        printf("Total segment content length: %"PRId32" bytes\n",
               segmentcontentlength);

        /* calculate what the total object content length should have been */
        l = segmentcontentlength + 10 * (nsegments + 1) + headerlength + 4;
        if (l != objectlength)
            printf("Warning: actual object length (%"PRId32") != "
                   "stored object length (%"PRId32")\n", l, objectlength);
    }
    fclose(infile);
    return 0;
}