Upstream version 2.08rc7

1 files changed, 611 insertions, 0 deletions

diff --git a/rdoff/rdoff.c b/rdoff/rdoff.c
new file mode 100644
index 0000000..3c7b336
--- /dev/null
+++ b/rdoff/rdoff.c
@@ -0,0 +1,611 @@
+/* ----------------------------------------------------------------------- *
+ *   
+ *   Copyright 1996-2009 The NASM Authors - All Rights Reserved
+ *   See the file AUTHORS included with the NASM distribution for
+ *   the specific copyright holders.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following
+ *   conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above
+ *     copyright notice, this list of conditions and the following
+ *     disclaimer in the documentation and/or other materials provided
+ *     with the distribution.
+ *     
+ *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * rdoff.c	library of routines for manipulating rdoff files
+ */
+
+/* TODO:	The functions in this module assume they are running
+ *		on a little-endian machine. This should be fixed to
+ *		make it portable.
+ */
+
+#include "compiler.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <inttypes.h>
+
+#define RDOFF_UTILS
+
+#include "rdoff.h"
+
+#define newstr(str) strcpy(malloc(strlen(str) + 1),str)
+#define newstrcat(s1,s2) strcat(strcpy(malloc(strlen(s1) + strlen(s2) + 1), \
+                                       s1),s2)
+
+/*
+ * Comment this out to allow the module to read & write header record types
+ * that it isn't aware of. With this defined, unrecognised header records
+ * will generate error number 8, reported as 'unknown extended header record'.
+ */
+
+#define STRICT_ERRORS
+
+/* ========================================================================
+ * Code for memory buffers (for delayed writing of header until we know
+ * how int32_t it is).
+ * ======================================================================== */
+
+memorybuffer *newmembuf()
+{
+    memorybuffer *t;
+
+    t = malloc(sizeof(memorybuffer));
+    if (!t)
+        return NULL;
+
+    t->length = 0;
+    t->next = NULL;
+    return t;
+}
+
+void membufwrite(memorybuffer * const b, void *data, int bytes)
+{
+    uint16_t w;
+    int32_t l;
+    char *c;
+
+    if (b->next) {              /* memory buffer full - use next buffer */
+        membufwrite(b->next, data, bytes);
+        return;
+    }
+
+    if ((bytes < 0 && b->length - bytes > BUF_BLOCK_LEN)
+        || (bytes > 0 && b->length + bytes > BUF_BLOCK_LEN)) {
+
+        /* buffer full and no next allocated... allocate and initialise next
+         * buffer */
+        b->next = newmembuf();
+        membufwrite(b->next, data, bytes);
+        return;
+    }
+
+    switch (bytes) {
+    case -4:                   /* convert to little-endian */
+        l = *(int32_t *)data;
+        b->buffer[b->length++] = l & 0xFF;
+        l >>= 8;
+        b->buffer[b->length++] = l & 0xFF;
+        l >>= 8;
+        b->buffer[b->length++] = l & 0xFF;
+        l >>= 8;
+        b->buffer[b->length++] = l & 0xFF;
+        break;
+
+    case -2:
+        w = *(uint16_t *) data;
+        b->buffer[b->length++] = w & 0xFF;
+        w >>= 8;
+        b->buffer[b->length++] = w & 0xFF;
+        break;
+
+    default:
+        c = data;
+        while (bytes--)
+            b->buffer[b->length++] = *c++;
+        break;
+    }
+}
+
+void membufdump(memorybuffer * b, FILE * fp)
+{
+    if (!b)
+        return;
+
+    fwrite(b->buffer, 1, b->length, fp);
+
+    membufdump(b->next, fp);
+}
+
+int membuflength(memorybuffer * b)
+{
+    if (!b)
+        return 0;
+    return b->length + membuflength(b->next);
+}
+
+void freemembuf(memorybuffer * b)
+{
+    if (!b)
+        return;
+    freemembuf(b->next);
+    free(b);
+}
+
+/* =========================================================================
+   General purpose routines and variables used by the library functions
+   ========================================================================= */
+
+/*
+ * translateint32_t() and translateint16_t()
+ *
+ * translate from little endian to local representation
+ */
+int32_t translateint32_t(int32_t in)
+{
+    int32_t r;
+    uint8_t *i;
+
+    i = (uint8_t *)&in;
+    r = i[3];
+    r = (r << 8) + i[2];
+    r = (r << 8) + i[1];
+    r = (r << 8) + *i;
+
+    return r;
+}
+
+uint16_t translateint16_t(uint16_t in)
+{
+    uint16_t r;
+    uint8_t *i;
+
+    i = (uint8_t *)&in;
+    r = (i[1] << 8) + i[0];
+
+    return r;
+}
+
+/* Segment types */
+static char *knownsegtypes[8] = {
+    "NULL", "text", "data", "object comment",
+    "linked comment", "loader comment",
+    "symbolic debug", "line number debug"
+};
+
+/* Get a textual string describing the segment type */
+char *translatesegmenttype(uint16_t type)
+{
+    if (type < 8)
+        return knownsegtypes[type];
+    if (type < 0x0020)
+        return "reserved";
+    if (type < 0x1000)
+        return "reserved - Moscow";
+    if (type < 0x8000)
+        return "reserved - system dependant";
+    if (type < 0xFFFF)
+        return "reserved - other";
+    if (type == 0xFFFF)
+        return "invalid type code";
+    return "type code out of range";
+}
+
+/* This signature is written to the start of RDOFF files */
+const char *RDOFFId = RDOFF2_SIGNATURE;
+
+/* Error messages. Must correspond to the codes defined in rdoff.h */
+const char *rdf_errors[11] = {
+    /* 0 */ "no error occurred",
+    /* 1 */ "could not open file",
+    /* 2 */ "invalid file format",
+    /* 3 */ "error reading file",
+    /* 4 */ "unknown error",
+    /* 5 */ "header not read",
+    /* 6 */ "out of memory",
+    /* 7 */ "RDOFF v1 not supported",
+    /* 8 */ "unknown extended header record",
+    /* 9 */ "header record of known type but unknown length",
+    /* 10 */ "no such segment"
+};
+
+int rdf_errno = 0;
+
+/* ========================================================================
+   The library functions
+   ======================================================================== */
+
+int rdfopen(rdffile * f, const char *name)
+{
+    FILE *fp;
+
+    fp = fopen(name, "rb");
+    if (!fp)
+        return rdf_errno = RDF_ERR_OPEN;
+
+    return rdfopenhere(f, fp, NULL, name);
+}
+
+int rdfopenhere(rdffile * f, FILE * fp, int *refcount, const char *name)
+{
+    char buf[8];
+    int32_t initpos;
+    int32_t l;
+    uint16_t s;
+
+    if (translateint32_t(0x01020304) != 0x01020304) {
+        /* fix this to be portable! */
+        fputs("*** this program requires a little endian machine\n",
+              stderr);
+        fprintf(stderr, "01020304h = %08"PRIx32"h\n", translateint32_t(0x01020304));
+        exit(3);
+    }
+
+    f->fp = fp;
+    initpos = ftell(fp);
+
+    fread(buf, 6, 1, f->fp);    /* read header */
+    buf[6] = 0;
+
+    if (strcmp(buf, RDOFFId)) {
+        fclose(f->fp);
+        if (!strcmp(buf, "RDOFF1"))
+            return rdf_errno = RDF_ERR_VER;
+        return rdf_errno = RDF_ERR_FORMAT;
+    }
+
+    if (fread(&l, 1, 4, f->fp) != 4
+        || fread(&f->header_len, 1, 4, f->fp) != 4) {
+        fclose(f->fp);
+        return rdf_errno = RDF_ERR_READ;
+    }
+
+    f->header_ofs = ftell(f->fp);
+    f->eof_offset = f->header_ofs + translateint32_t(l) - 4;
+
+    if (fseek(f->fp, f->header_len, SEEK_CUR)) {
+        fclose(f->fp);
+        return rdf_errno = RDF_ERR_FORMAT;      /* seek past end of file...? */
+    }
+
+    if (fread(&s, 1, 2, f->fp) != 2) {
+        fclose(f->fp);
+        return rdf_errno = RDF_ERR_READ;
+    }
+
+    f->nsegs = 0;
+
+    while (s != 0) {
+        f->seg[f->nsegs].type = s;
+        if (fread(&f->seg[f->nsegs].number, 1, 2, f->fp) != 2 ||
+            fread(&f->seg[f->nsegs].reserved, 1, 2, f->fp) != 2 ||
+            fread(&f->seg[f->nsegs].length, 1, 4, f->fp) != 4) {
+            fclose(f->fp);
+            return rdf_errno = RDF_ERR_READ;
+        }
+
+        f->seg[f->nsegs].offset = ftell(f->fp);
+        if (fseek(f->fp, f->seg[f->nsegs].length, SEEK_CUR)) {
+            fclose(f->fp);
+            return rdf_errno = RDF_ERR_FORMAT;
+        }
+        f->nsegs++;
+
+        if (fread(&s, 1, 2, f->fp) != 2) {
+            fclose(f->fp);
+            return rdf_errno = RDF_ERR_READ;
+        }
+    }
+
+    if (f->eof_offset != ftell(f->fp) + 8) {    /* +8 = skip null segment header */
+        fprintf(stderr, "warning: eof_offset [%"PRId32"] and actual eof offset "
+                "[%ld] don't match\n", f->eof_offset, ftell(f->fp) + 8);
+    }
+    fseek(f->fp, initpos, SEEK_SET);
+    f->header_loc = NULL;
+
+    f->name = newstr(name);
+    f->refcount = refcount;
+    if (refcount)
+        (*refcount)++;
+    return RDF_OK;
+}
+
+int rdfclose(rdffile * f)
+{
+    if (!f->refcount || !--(*f->refcount)) {
+        fclose(f->fp);
+        f->fp = NULL;
+    }
+    free(f->name);
+
+    return 0;
+}
+
+/*
+ * Print the message for last error (from rdf_errno)
+ */
+void rdfperror(const char *app, const char *name)
+{
+    fprintf(stderr, "%s:%s: %s\n", app, name, rdf_errors[rdf_errno]);
+    if (rdf_errno == RDF_ERR_OPEN || rdf_errno == RDF_ERR_READ) {
+        perror(app);
+    }
+}
+
+/*
+ * Find the segment by its number.
+ * Returns segment array index, or -1 if segment with such number was not found.
+ */
+int rdffindsegment(rdffile * f, int segno)
+{
+    int i;
+    for (i = 0; i < f->nsegs; i++)
+        if (f->seg[i].number == segno)
+            return i;
+    return -1;
+}
+
+/*
+ * Load the segment. Returns status.
+ */
+int rdfloadseg(rdffile * f, int segment, void *buffer)
+{
+    int32_t fpos;
+    size_t slen;
+
+    switch (segment) {
+    case RDOFF_HEADER:
+        fpos = f->header_ofs;
+        slen = f->header_len;
+        f->header_loc = (uint8_t *) buffer;
+        f->header_fp = 0;
+        break;
+    default:
+        if (segment < f->nsegs) {
+            fpos = f->seg[segment].offset;
+            slen = f->seg[segment].length;
+            f->seg[segment].data = (uint8_t *) buffer;
+        } else {
+            return rdf_errno = RDF_ERR_SEGMENT;
+        }
+    }
+
+    if (fseek(f->fp, fpos, SEEK_SET))
+        return rdf_errno = RDF_ERR_UNKNOWN;
+
+    if (fread(buffer, 1, slen, f->fp) != slen)
+        return rdf_errno = RDF_ERR_READ;
+
+    return RDF_OK;
+}
+
+/* Macros for reading integers from header in memory */
+
+#define RI8(v) v = f->header_loc[f->header_fp++]
+#define RI16(v) { v = (f->header_loc[f->header_fp] + \
+		       (f->header_loc[f->header_fp+1] << 8)); \
+		  f->header_fp += 2; }
+
+#define RI32(v) { v = (f->header_loc[f->header_fp] + \
+		       (f->header_loc[f->header_fp+1] << 8) + \
+		       (f->header_loc[f->header_fp+2] << 16) + \
+		       (f->header_loc[f->header_fp+3] << 24)); \
+		  f->header_fp += 4; }
+
+#define RS(str,max) { for(i=0;i<max;i++){\
+  RI8(str[i]); if (!str[i]) break;} str[i]=0; }
+
+/*
+ * Read a header record.
+ * Returns the address of record, or NULL in case of error.
+ */
+rdfheaderrec *rdfgetheaderrec(rdffile * f)
+{
+    static rdfheaderrec r;
+    int i;
+
+    if (!f->header_loc) {
+        rdf_errno = RDF_ERR_HEADER;
+        return NULL;
+    }
+
+    if (f->header_fp >= f->header_len)
+        return 0;
+
+    RI8(r.type);
+    RI8(r.g.reclen);
+
+    switch (r.type) {
+    case RDFREC_RELOC:         /* Relocation record */
+    case RDFREC_SEGRELOC:
+        if (r.r.reclen != 8) {
+            rdf_errno = RDF_ERR_RECLEN;
+            return NULL;
+        }
+        RI8(r.r.segment);
+        RI32(r.r.offset);
+        RI8(r.r.length);
+        RI16(r.r.refseg);
+        break;
+
+    case RDFREC_IMPORT:        /* Imported symbol record */
+    case RDFREC_FARIMPORT:
+        RI8(r.i.flags);
+        RI16(r.i.segment);
+        RS(r.i.label, EXIM_LABEL_MAX);
+        break;
+
+    case RDFREC_GLOBAL:        /* Exported symbol record */
+        RI8(r.e.flags);
+        RI8(r.e.segment);
+        RI32(r.e.offset);
+        RS(r.e.label, EXIM_LABEL_MAX);
+        break;
+
+    case RDFREC_DLL:           /* DLL record */
+        RS(r.d.libname, MODLIB_NAME_MAX);
+        break;
+
+    case RDFREC_BSS:           /* BSS reservation record */
+        if (r.r.reclen != 4) {
+            rdf_errno = RDF_ERR_RECLEN;
+            return NULL;
+        }
+        RI32(r.b.amount);
+        break;
+
+    case RDFREC_MODNAME:       /* Module name record */
+        RS(r.m.modname, MODLIB_NAME_MAX);
+        break;
+
+    case RDFREC_COMMON:        /* Common variable */
+        RI16(r.c.segment);
+        RI32(r.c.size);
+        RI16(r.c.align);
+        RS(r.c.label, EXIM_LABEL_MAX);
+        break;
+
+    default:
+#ifdef STRICT_ERRORS
+        rdf_errno = RDF_ERR_RECTYPE;    /* unknown header record */
+        return NULL;
+#else
+        for (i = 0; i < r.g.reclen; i++)
+            RI8(r.g.data[i]);
+#endif
+    }
+    return &r;
+}
+
+/*
+ * Rewind to the beginning of the file
+ */
+void rdfheaderrewind(rdffile * f)
+{
+    f->header_fp = 0;
+}
+
+rdf_headerbuf *rdfnewheader(void)
+{
+    rdf_headerbuf *hb = malloc(sizeof(rdf_headerbuf));
+    if (hb == NULL)
+        return NULL;
+
+    hb->buf = newmembuf();
+    hb->nsegments = 0;
+    hb->seglength = 0;
+
+    return hb;
+}
+
+int rdfaddheader(rdf_headerbuf * h, rdfheaderrec * r)
+{
+#ifndef STRICT_ERRORS
+    int i;
+#endif
+    membufwrite(h->buf, &r->type, 1);
+    membufwrite(h->buf, &r->g.reclen, 1);
+
+    switch (r->type) {
+    case RDFREC_GENERIC:       /* generic */
+        membufwrite(h->buf, &r->g.data, r->g.reclen);
+        break;
+    case RDFREC_RELOC:
+    case RDFREC_SEGRELOC:
+        membufwrite(h->buf, &r->r.segment, 1);
+        membufwrite(h->buf, &r->r.offset, -4);
+        membufwrite(h->buf, &r->r.length, 1);
+        membufwrite(h->buf, &r->r.refseg, -2);  /* 9 bytes written */
+        break;
+
+    case RDFREC_IMPORT:        /* import */
+    case RDFREC_FARIMPORT:
+        membufwrite(h->buf, &r->i.flags, 1);
+        membufwrite(h->buf, &r->i.segment, -2);
+        membufwrite(h->buf, &r->i.label, strlen(r->i.label) + 1);
+        break;
+
+    case RDFREC_GLOBAL:        /* export */
+        membufwrite(h->buf, &r->e.flags, 1);
+        membufwrite(h->buf, &r->e.segment, 1);
+        membufwrite(h->buf, &r->e.offset, -4);
+        membufwrite(h->buf, &r->e.label, strlen(r->e.label) + 1);
+        break;
+
+    case RDFREC_DLL:           /* DLL */
+        membufwrite(h->buf, &r->d.libname, strlen(r->d.libname) + 1);
+        break;
+
+    case RDFREC_BSS:           /* BSS */
+        membufwrite(h->buf, &r->b.amount, -4);
+        break;
+
+    case RDFREC_MODNAME:       /* Module name */
+        membufwrite(h->buf, &r->m.modname, strlen(r->m.modname) + 1);
+        break;
+
+    default:
+#ifdef STRICT_ERRORS
+        return rdf_errno = RDF_ERR_RECTYPE;
+#else
+        for (i = 0; i < r->g.reclen; i++)
+            membufwrite(h->buf, r->g.data[i], 1);
+#endif
+    }
+    return 0;
+}
+
+int rdfaddsegment(rdf_headerbuf * h, int32_t seglength)
+{
+    h->nsegments++;
+    h->seglength += seglength;
+    return 0;
+}
+
+int rdfwriteheader(FILE * fp, rdf_headerbuf * h)
+{
+    int32_t l, l2;
+
+    fwrite(RDOFFId, 1, strlen(RDOFFId), fp);
+
+    l = membuflength(h->buf);
+    l2 = l + 14 + 10 * h->nsegments + h->seglength;
+    l = translateint32_t(l);
+    l2 = translateint32_t(l2);
+    fwrite(&l2, 4, 1, fp);      /* object length */
+    fwrite(&l, 4, 1, fp);       /* header length */
+
+    membufdump(h->buf, fp);
+
+    return 0;                   /* no error handling in here... CHANGE THIS! */
+}
+
+void rdfdoneheader(rdf_headerbuf * h)
+{
+    freemembuf(h->buf);
+    free(h);
+}