diff options
Diffstat (limited to 'bfd/archive.c')
| -rw-r--r-- | bfd/archive.c | 374 |
1 files changed, 329 insertions, 45 deletions
diff --git a/bfd/archive.c b/bfd/archive.c index e080d3a301..5389f7adcc 100644 --- a/bfd/archive.c +++ b/bfd/archive.c @@ -1,6 +1,6 @@ /* BFD back-end for archive files (libraries). Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, - 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 + 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. Written by Cygnus Support. Mostly Gumby Henkel-Wallace's fault. @@ -137,6 +137,7 @@ SUBSECTION #include "aout/ranlib.h" #include "safe-ctype.h" #include "hashtab.h" +#include "filenames.h" #ifndef errno extern int errno; @@ -157,7 +158,7 @@ struct ar_cache { #define ar_maxnamelen(abfd) ((abfd)->xvec->ar_max_namelen) #define arch_eltdata(bfd) ((struct areltdata *) ((bfd)->arelt_data)) -#define arch_hdr(bfd) ((struct ar_hdr *) arch_eltdata(bfd)->arch_header) +#define arch_hdr(bfd) ((struct ar_hdr *) arch_eltdata (bfd)->arch_header) void _bfd_ar_spacepad (char *p, size_t n, const char *fmt, long val) @@ -326,24 +327,61 @@ _bfd_add_bfd_to_archive_cache (bfd *arch_bfd, file_ptr filepos, bfd *new_elt) return TRUE; } +static bfd * +_bfd_find_nested_archive (bfd *arch_bfd, const char *filename) +{ + bfd *abfd; + + for (abfd = arch_bfd->nested_archives; + abfd != NULL; + abfd = abfd->archive_next) + { + if (strcmp (filename, abfd->filename) == 0) + return abfd; + } + abfd = bfd_openr (filename, NULL); + if (abfd) + { + abfd->archive_next = arch_bfd->nested_archives; + arch_bfd->nested_archives = abfd; + } + return abfd; +} + /* The name begins with space. Hence the rest of the name is an index into the string table. */ static char * -get_extended_arelt_filename (bfd *arch, const char *name) +get_extended_arelt_filename (bfd *arch, const char *name, file_ptr *originp) { unsigned long index = 0; + const char *endp; /* Should extract string so that I can guarantee not to overflow into the next region, but I'm too lazy. */ errno = 0; /* Skip first char, which is '/' in SVR4 or ' ' in some other variants. */ - index = strtol (name + 1, NULL, 10); + index = strtol (name + 1, (char **) &endp, 10); if (errno != 0 || index >= bfd_ardata (arch)->extended_names_size) { bfd_set_error (bfd_error_malformed_archive); return NULL; } + /* In a thin archive, a member of an archive-within-an-archive + will have the offset in the inner archive encoded here. */ + if (bfd_is_thin_archive (arch) && endp != NULL && *endp == ':') + { + file_ptr origin = strtol (endp + 1, NULL, 10); + + if (errno != 0 || index >= bfd_ardata (arch)->extended_names_size) + { + bfd_set_error (bfd_error_malformed_archive); + return NULL; + } + *originp = origin; + } + else + *originp = 0; return bfd_ardata (arch)->extended_names + index; } @@ -376,6 +414,7 @@ _bfd_generic_read_ar_hdr_mag (bfd *abfd, const char *mag) bfd_size_type namelen = 0; bfd_size_type allocsize = sizeof (struct areltdata) + sizeof (struct ar_hdr); char *allocptr = 0; + file_ptr origin = 0; if (bfd_bread (hdrp, sizeof (struct ar_hdr), abfd) != sizeof (struct ar_hdr)) { @@ -407,7 +446,7 @@ _bfd_generic_read_ar_hdr_mag (bfd *abfd, const char *mag) && memchr (hdr.ar_name, '/', ar_maxnamelen (abfd)) == NULL)) && bfd_ardata (abfd)->extended_names != NULL) { - filename = get_extended_arelt_filename (abfd, hdr.ar_name); + filename = get_extended_arelt_filename (abfd, hdr.ar_name, &origin); if (filename == NULL) return NULL; } @@ -476,6 +515,7 @@ _bfd_generic_read_ar_hdr_mag (bfd *abfd, const char *mag) ared->arch_header = allocptr + sizeof (struct areltdata); memcpy (ared->arch_header, &hdr, sizeof (struct ar_hdr)); ared->parsed_size = parsed_size; + ared->origin = origin; if (filename != NULL) ared->filename = filename; @@ -491,6 +531,30 @@ _bfd_generic_read_ar_hdr_mag (bfd *abfd, const char *mag) return ared; } +/* Append the relative pathname for a member of the thin archive + to the pathname of the directory containing the archive. */ + +static char * +append_relative_path (bfd *arch, char *elt_name) +{ + const char *arch_name = arch->filename; + const char *base_name = lbasename (arch_name); + size_t prefix_len; + char *filename; + + if (base_name == arch_name) + return elt_name; + + prefix_len = base_name - arch_name; + filename = bfd_alloc (arch, prefix_len + strlen (elt_name) + 1); + if (filename == NULL) + return NULL; + + strncpy (filename, arch_name, prefix_len); + strcpy (filename + prefix_len, elt_name); + return filename; +} + /* This is an internal function; it's mainly used when indexing through the archive symbol table, but also used to get the next element, since it handles the bookkeeping so nicely for us. */ @@ -500,6 +564,7 @@ _bfd_get_elt_at_filepos (bfd *archive, file_ptr filepos) { struct areltdata *new_areldata; bfd *n_nfd; + char *filename; if (archive->my_archive) { @@ -517,21 +582,74 @@ _bfd_get_elt_at_filepos (bfd *archive, file_ptr filepos) if ((new_areldata = _bfd_read_ar_hdr (archive)) == NULL) return NULL; - n_nfd = _bfd_create_empty_archive_element_shell (archive); + filename = new_areldata->filename; + + if (bfd_is_thin_archive (archive)) + { + /* This is a proxy entry for an external file. */ + if (! IS_ABSOLUTE_PATH (filename)) + { + filename = append_relative_path (archive, filename); + if (filename == NULL) + return NULL; + } + + if (new_areldata->origin > 0) + { + /* This proxy entry refers to an element of a nested archive. + Locate the member of that archive and return a bfd for it. */ + bfd *ext_arch = _bfd_find_nested_archive (archive, filename); + + if (ext_arch == NULL + || ! bfd_check_format (ext_arch, bfd_archive)) + { + bfd_release (archive, new_areldata); + return NULL; + } + n_nfd = _bfd_get_elt_at_filepos (ext_arch, new_areldata->origin); + if (n_nfd == NULL) + { + bfd_release (archive, new_areldata); + return NULL; + } + n_nfd->proxy_origin = bfd_tell (archive); + return n_nfd; + } + /* It's not an element of a nested archive; + open the external file as a bfd. */ + n_nfd = bfd_openr (filename, NULL); + } + else + { + n_nfd = _bfd_create_empty_archive_element_shell (archive); + } + if (n_nfd == NULL) { bfd_release (archive, new_areldata); return NULL; } - n_nfd->origin = bfd_tell (archive); + n_nfd->proxy_origin = bfd_tell (archive); + + if (bfd_is_thin_archive (archive)) + { + n_nfd->origin = 0; + } + else + { + n_nfd->origin = n_nfd->proxy_origin; + n_nfd->filename = filename; + } + n_nfd->arelt_data = new_areldata; - n_nfd->filename = new_areldata->filename; if (_bfd_add_bfd_to_archive_cache (archive, filepos, n_nfd)) return n_nfd; /* Huh? */ + /* FIXME: n_nfd isn't allocated in the archive's memory pool. + If we reach this point, I think bfd_release will abort. */ bfd_release (archive, n_nfd); bfd_release (archive, new_areldata); return NULL; @@ -568,8 +686,8 @@ DESCRIPTION bfd * bfd_openr_next_archived_file (bfd *archive, bfd *last_file) { - if ((bfd_get_format (archive) != bfd_archive) || - (archive->direction == write_direction)) + if ((bfd_get_format (archive) != bfd_archive) + || (archive->direction == write_direction)) { bfd_set_error (bfd_error_invalid_operation); return NULL; @@ -589,7 +707,9 @@ bfd_generic_openr_next_archived_file (bfd *archive, bfd *last_file) else { unsigned int size = arelt_size (last_file); - filestart = last_file->origin + size; + filestart = last_file->proxy_origin; + if (! bfd_is_thin_archive (archive)) + filestart += size; if (archive->my_archive) filestart -= archive->origin; /* Pad to an even boundary... @@ -615,8 +735,11 @@ bfd_generic_archive_p (bfd *abfd) return NULL; } - if (strncmp (armag, ARMAG, SARMAG) != 0 && - strncmp (armag, ARMAGB, SARMAG) != 0) + bfd_is_thin_archive (abfd) = (strncmp (armag, ARMAGT, SARMAG) == 0); + + if (strncmp (armag, ARMAG, SARMAG) != 0 + && strncmp (armag, ARMAGB, SARMAG) != 0 + && ! bfd_is_thin_archive (abfd)) return 0; tdata_hold = bfd_ardata (abfd); @@ -1110,7 +1233,7 @@ _bfd_slurp_extended_name_table (bfd *abfd) char *limit = temp + namedata->parsed_size; for (; temp < limit; ++temp) { - if (*temp == '\012') + if (*temp == ARFMAG[0]) temp[temp > ext_names && temp[-1] == '/' ? -1 : 0] = '\0'; if (*temp == '\\') *temp = '/'; @@ -1190,6 +1313,66 @@ normalize (bfd *abfd ATTRIBUTE_UNUSED, const char *file) } #endif +/* Adjust a relative path name based on the reference path. */ + +static const char * +adjust_relative_path (const char * path, const char * ref_path) +{ + static char *pathbuf = NULL; + static int pathbuf_len = 0; + const char *pathp = path; + const char *refp = ref_path; + int element_count = 0; + int len; + char *newp; + + /* Remove common leading path elements. */ + for (;;) + { + const char *e1 = pathp; + const char *e2 = refp; + + while (*e1 && ! IS_DIR_SEPARATOR (*e1)) + ++e1; + while (*e2 && ! IS_DIR_SEPARATOR (*e2)) + ++e2; + if (*e1 == '\0' || *e2 == '\0' || e1 - pathp != e2 - refp + || strncmp (pathp, refp, e1 - pathp) != 0) + break; + pathp = e1 + 1; + refp = e2 + 1; + } + + /* For each leading path element in the reference path, + insert "../" into the path. */ + for (; *refp; ++refp) + if (IS_DIR_SEPARATOR (*refp)) + ++element_count; + len = 3 * element_count + strlen (path) + 1; + + if (len > pathbuf_len) + { + if (pathbuf != NULL) + free (pathbuf); + pathbuf_len = 0; + pathbuf = bfd_malloc (len); + if (pathbuf == NULL) + return path; + pathbuf_len = len; + } + + newp = pathbuf; + while (element_count-- > 0) + { + /* FIXME: Support Windows style path separators as well. */ + strcpy (newp, "../"); + newp += 3; + } + strcpy (newp, pathp); + + return pathbuf; +} + /* Build a BFD style extended name table. */ bfd_boolean @@ -1232,8 +1415,11 @@ _bfd_construct_extended_name_table (bfd *abfd, bfd_size_type total_namelen = 0; bfd *current; char *strptr; + const char *last_filename; + long last_stroff; *tablen = 0; + last_filename = NULL; /* Figure out how long the table should be. */ for (current = abfd->archive_head; @@ -1243,6 +1429,42 @@ _bfd_construct_extended_name_table (bfd *abfd, const char *normal; unsigned int thislen; + if (bfd_is_thin_archive (abfd)) + { + const char *filename = current->filename; + + /* If the element being added is a member of another archive + (i.e., we are flattening), use the containing archive's name. */ + if (current->my_archive + && ! bfd_is_thin_archive (current->my_archive)) + filename = current->my_archive->filename; + + /* If the path is the same as the previous path seen, + reuse it. This can happen when flattening a thin + archive that contains other archives. */ + if (last_filename && strcmp (last_filename, filename) == 0) + continue; + + last_filename = filename; + + /* If the path is relative, adjust it relative to + the containing archive. */ + if (! IS_ABSOLUTE_PATH (filename) + && ! IS_ABSOLUTE_PATH (abfd->filename)) + normal = adjust_relative_path (filename, abfd->filename); + else + normal = filename; + + /* In a thin archive, always store the full pathname + in the extended name table. */ + total_namelen += strlen (normal) + 1; + if (trailing_slash) + /* Leave room for trailing slash. */ + ++total_namelen; + + continue; + } + normal = normalize (current, current->filename); if (normal == NULL) return FALSE; @@ -1290,38 +1512,85 @@ _bfd_construct_extended_name_table (bfd *abfd, *tablen = total_namelen; strptr = *tabloc; + last_filename = NULL; + last_stroff = 0; + for (current = abfd->archive_head; current != NULL; current = current->archive_next) { const char *normal; unsigned int thislen; - - normal = normalize (current, current->filename); - if (normal == NULL) - return FALSE; + long stroff; + const char *filename = current->filename; + + if (bfd_is_thin_archive (abfd)) + { + /* If the element being added is a member of another archive + (i.e., we are flattening), use the containing archive's name. */ + if (current->my_archive + && ! bfd_is_thin_archive (current->my_archive)) + filename = current->my_archive->filename; + /* If the path is the same as the previous path seen, + reuse it. This can happen when flattening a thin + archive that contains other archives. + If the path is relative, adjust it relative to + the containing archive. */ + if (last_filename && strcmp (last_filename, filename) == 0) + normal = last_filename; + else if (! IS_ABSOLUTE_PATH (filename) + && ! IS_ABSOLUTE_PATH (abfd->filename)) + normal = adjust_relative_path (filename, abfd->filename); + else + normal = filename; + } + else + { + normal = normalize (current, filename); + if (normal == NULL) + return FALSE; + } thislen = strlen (normal); - if (thislen > maxname) + if (thislen > maxname || bfd_is_thin_archive (abfd)) { /* Works for now; may need to be re-engineered if we encounter an oddball archive format and want to generalise this hack. */ struct ar_hdr *hdr = arch_hdr (current); - strcpy (strptr, normal); - if (! trailing_slash) - strptr[thislen] = '\012'; - else - { - strptr[thislen] = '/'; - strptr[thislen + 1] = '\012'; + if (normal == last_filename) + stroff = last_stroff; + else + { + strcpy (strptr, normal); + if (! trailing_slash) + strptr[thislen] = ARFMAG[0]; + else + { + strptr[thislen] = '/'; + strptr[thislen + 1] = ARFMAG[0]; + } + stroff = strptr - *tabloc; + last_stroff = stroff; } hdr->ar_name[0] = ar_padchar (current); - _bfd_ar_spacepad (hdr->ar_name + 1, maxname - 1, "%-ld", - strptr - *tabloc); - strptr += thislen + 1; - if (trailing_slash) - ++strptr; + if (bfd_is_thin_archive (abfd) && current->origin > 0) + { + int len = snprintf (hdr->ar_name + 1, maxname - 1, "%-ld:", + stroff); + _bfd_ar_spacepad (hdr->ar_name + 1 + len, maxname - 1 - len, + "%-ld", + current->origin - sizeof (struct ar_hdr)); + } + else + _bfd_ar_spacepad (hdr->ar_name + 1, maxname - 1, "%-ld", stroff); + if (normal != last_filename) + { + strptr += thislen + 1; + if (trailing_slash) + ++strptr; + last_filename = filename; + } } } @@ -1593,6 +1862,7 @@ bfd_gnu_truncate_arname (bfd *abfd, const char *pathname, char *arhdr) { /* We could have foo/bar\\baz, or foo\\bar, or d:bar. */ char *bslash = strrchr (pathname, '\\'); + if (filename == NULL || (bslash != NULL && bslash > filename)) filename = bslash; if (filename == NULL && pathname[0] != '\0' && pathname[1] == ':') @@ -1610,7 +1880,8 @@ bfd_gnu_truncate_arname (bfd *abfd, const char *pathname, char *arhdr) if (length <= maxlen) memcpy (hdr->ar_name, filename, length); else - { /* pathname: meet procrustes */ + { + /* pathname: meet procrustes. */ memcpy (hdr->ar_name, filename, maxlen); if ((filename[length - 2] == '.') && (filename[length - 1] == 'o')) { @@ -1638,6 +1909,7 @@ _bfd_write_archive_contents (bfd *arch) bfd_boolean hasobjects = FALSE; bfd_size_type wrote; int tries; + char *armag; /* Verify the viability of all entries; if any of them live in the filesystem (as opposed to living in an archive open for input) @@ -1681,7 +1953,10 @@ _bfd_write_archive_contents (bfd *arch) if (bfd_seek (arch, (file_ptr) 0, SEEK_SET) != 0) return FALSE; - wrote = bfd_bwrite (ARMAG, SARMAG, arch); + armag = ARMAG; + if (bfd_is_thin_archive (arch)) + armag = ARMAGT; + wrote = bfd_bwrite (armag, SARMAG, arch); if (wrote != SARMAG) return FALSE; @@ -1707,7 +1982,7 @@ _bfd_write_archive_contents (bfd *arch) return FALSE; if ((elength % 2) == 1) { - if (bfd_bwrite ("\012", 1, arch) != 1) + if (bfd_bwrite (ARFMAG, 1, arch) != 1) return FALSE; } } @@ -1724,11 +1999,15 @@ _bfd_write_archive_contents (bfd *arch) if (bfd_bwrite (hdr, sizeof (*hdr), arch) != sizeof (*hdr)) return FALSE; + if (bfd_is_thin_archive (arch)) + continue; if (bfd_seek (current, (file_ptr) 0, SEEK_SET) != 0) goto input_err; + while (remaining) { unsigned int amt = DEFAULT_BUFFERSIZE; + if (amt > remaining) amt = remaining; errno = 0; @@ -1742,9 +2021,10 @@ _bfd_write_archive_contents (bfd *arch) return FALSE; remaining -= amt; } + if ((arelt_size (current) % 2) == 1) { - if (bfd_bwrite ("\012", 1, arch) != 1) + if (bfd_bwrite (ARFMAG, 1, arch) != 1) return FALSE; } } @@ -1809,8 +2089,8 @@ _bfd_compute_and_write_armap (bfd *arch, unsigned int elength) goto error_return; /* Drop all the files called __.SYMDEF, we're going to make our own. */ - while (arch->archive_head && - strcmp (arch->archive_head->filename, "__.SYMDEF") == 0) + while (arch->archive_head + && strcmp (arch->archive_head->filename, "__.SYMDEF") == 0) arch->archive_head = arch->archive_head->archive_next; /* Map over each element. */ @@ -1851,10 +2131,10 @@ _bfd_compute_and_write_armap (bfd *arch, unsigned int elength) flagword flags = (syms[src_count])->flags; asection *sec = syms[src_count]->section; - if ((flags & BSF_GLOBAL || - flags & BSF_WEAK || - flags & BSF_INDIRECT || - bfd_is_com_section (sec)) + if ((flags & BSF_GLOBAL + || flags & BSF_WEAK + || flags & BSF_INDIRECT + || bfd_is_com_section (sec)) && ! bfd_is_und_section (sec)) { bfd_size_type namelen; @@ -2139,10 +2419,14 @@ coff_write_armap (bfd *arch, return FALSE; count++; } - /* Add size of this archive entry. */ - archive_member_file_ptr += arelt_size (current) + sizeof (struct ar_hdr); - /* Remember aboout the even alignment. */ - archive_member_file_ptr += archive_member_file_ptr % 2; + archive_member_file_ptr += sizeof (struct ar_hdr); + if (! bfd_is_thin_archive (arch)) + { + /* Add size of this archive entry. */ + archive_member_file_ptr += arelt_size (current); + /* Remember about the even alignment. */ + archive_member_file_ptr += archive_member_file_ptr % 2; + } current = current->archive_next; } |