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[/] [openrisc/] [trunk/] [gnu-src/] [binutils-2.18.50/] [bfd/] [vms-misc.c] - Rev 179
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/* vms-misc.c -- Miscellaneous functions for VAX (openVMS/VAX) and EVAX (openVMS/Alpha) files. Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc. Written by Klaus K"ampf (kkaempf@rmi.de) This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ #if __STDC__ #include <stdarg.h> #endif #include "sysdep.h" #include "bfd.h" #include "bfdlink.h" #include "libbfd.h" #include "vms.h" #if VMS_DEBUG /* Debug functions. */ /* Debug function for all vms extensions evaluates environment variable VMS_DEBUG for a numerical value on the first call all error levels below this value are printed levels: 1 toplevel bfd calls (functions from the bfd vector) 2 functions called by bfd calls ... 9 almost everything level is also indentation level. Indentation is performed if level > 0. */ void _bfd_vms_debug (int level, char *format, ...) { static int min_level = -1; static FILE *output = NULL; char *eptr; va_list args; int abslvl = (level > 0) ? level : - level; if (min_level == -1) { if ((eptr = getenv ("VMS_DEBUG")) != NULL) { min_level = atoi (eptr); output = stderr; } else min_level = 0; } if (output == NULL) return; if (abslvl > min_level) return; while (--level>0) fprintf (output, " "); va_start (args, format); vfprintf (output, format, args); fflush (output); va_end (args); } /* A debug function hex dump 'size' bytes starting at 'ptr'. */ void _bfd_hexdump (int level, unsigned char *ptr, int size, int offset) { unsigned char *lptr = ptr; int count = 0; long start = offset; while (size-- > 0) { if ((count%16) == 0) vms_debug (level, "%08lx:", start); vms_debug (-level, " %02x", *ptr++); count++; start++; if (size == 0) { while ((count%16) != 0) { vms_debug (-level, " "); count++; } } if ((count%16) == 0) { vms_debug (-level, " "); while (lptr < ptr) { vms_debug (-level, "%c", (*lptr < 32)?'.':*lptr); lptr++; } vms_debug (-level, "\n"); } } if ((count%16) != 0) vms_debug (-level, "\n"); } #endif /* Hash functions These are needed when reading an object file. */ /* Allocate new vms_hash_entry keep the symbol name and a pointer to the bfd symbol in the table. */ struct bfd_hash_entry * _bfd_vms_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table, const char *string) { vms_symbol_entry *ret; #if VMS_DEBUG vms_debug (5, "_bfd_vms_hash_newfunc (%p, %p, %s)\n", entry, table, string); #endif if (entry == NULL) { ret = (vms_symbol_entry *) bfd_hash_allocate (table, sizeof (vms_symbol_entry)); if (ret == NULL) { bfd_set_error (bfd_error_no_memory); return NULL; } entry = (struct bfd_hash_entry *) ret; } /* Call the allocation method of the base class. */ ret = (vms_symbol_entry *) bfd_hash_newfunc (entry, table, string); #if VMS_DEBUG vms_debug (6, "_bfd_vms_hash_newfunc ret %p\n", ret); #endif ret->symbol = NULL; return (struct bfd_hash_entry *)ret; } /* Object file input functions. */ /* Return type and length from record header (buf) on Alpha. */ void _bfd_vms_get_header_values (bfd * abfd ATTRIBUTE_UNUSED, unsigned char *buf, int *type, int *length) { if (type != 0) *type = bfd_getl16 (buf); buf += 2; if (length != 0) *length = bfd_getl16 (buf); #if VMS_DEBUG vms_debug (10, "_bfd_vms_get_header_values type %x, length %x\n", (type?*type:0), (length?*length:0)); #endif } /* Get next record from object file to vms_buf. Set PRIV(buf_size) and return it This is a little tricky since it should be portable. The openVMS object file has 'variable length' which means that read() returns data in chunks of (hopefully) correct and expected size. The linker (and other tools on vms) depend on that. Unix doesn't know about 'formatted' files, so reading and writing such an object file in a unix environment is not trivial. With the tool 'file' (available on all vms ftp sites), one can view and change the attributes of a file. Changing from 'variable length' to 'fixed length, 512 bytes' reveals the record length at the first 2 bytes of every record. The same happens during the transfer of object files from vms to unix, at least with ucx, dec's implementation of tcp/ip. The vms format repeats the length at bytes 2 & 3 of every record. On the first call (file_format == FF_UNKNOWN) we check if the first and the third byte pair (!) of the record match. If they do it's an object file in an unix environment or with wrong attributes (FF_FOREIGN), else we should be in a vms environment where read() returns the record size (FF_NATIVE). Reading is always done in 2 steps. First just the record header is read and the length extracted by get_header_values, then the read buffer is adjusted and the remaining bytes are read in. All file i/o is always done on even file positions. */ int _bfd_vms_get_record (bfd * abfd) { int test_len, test_start, remaining; unsigned char *vms_buf; #if VMS_DEBUG vms_debug (8, "_bfd_vms_get_record\n"); #endif /* Minimum is 6 bytes on Alpha (2 bytes length, 2 bytes record id, 2 bytes length repeated) On the VAX there's no length information in the record so start with OBJ_S_C_MAXRECSIZ. */ if (PRIV (buf_size) == 0) { bfd_size_type amt; if (PRIV (is_vax)) { amt = OBJ_S_C_MAXRECSIZ; PRIV (file_format) = FF_VAX; } else amt = 6; PRIV (vms_buf) = bfd_malloc (amt); PRIV (buf_size) = amt; } vms_buf = PRIV (vms_buf); if (vms_buf == 0) return -1; switch (PRIV (file_format)) { case FF_UNKNOWN: case FF_FOREIGN: test_len = 6; /* Probe 6 bytes. */ test_start = 2; /* Where the record starts. */ break; case FF_NATIVE: test_len = 4; test_start = 0; break; default: case FF_VAX: test_len = 0; test_start = 0; break; } /* Skip odd alignment byte. */ if (bfd_tell (abfd) & 1) { if (bfd_bread (PRIV (vms_buf), (bfd_size_type) 1, abfd) != 1) { bfd_set_error (bfd_error_file_truncated); return 0; } } /* Read the record header on Alpha. */ if ((test_len != 0) && (bfd_bread (PRIV (vms_buf), (bfd_size_type) test_len, abfd) != (bfd_size_type) test_len)) { bfd_set_error (bfd_error_file_truncated); return 0; } /* Check file format on first call. */ if (PRIV (file_format) == FF_UNKNOWN) { /* Record length repeats ? */ if (vms_buf[0] == vms_buf[4] && vms_buf[1] == vms_buf[5]) { PRIV (file_format) = FF_FOREIGN; /* Y: foreign environment. */ test_start = 2; } else { PRIV (file_format) = FF_NATIVE; /* N: native environment. */ test_start = 0; } } if (PRIV (is_vax)) { PRIV (rec_length) = bfd_bread (vms_buf, (bfd_size_type) PRIV (buf_size), abfd); if (PRIV (rec_length) <= 0) { bfd_set_error (bfd_error_file_truncated); return 0; } PRIV (vms_rec) = vms_buf; } else { /* Alpha. */ /* Extract vms record length. */ _bfd_vms_get_header_values (abfd, vms_buf + test_start, NULL, & PRIV (rec_length)); if (PRIV (rec_length) <= 0) { bfd_set_error (bfd_error_file_truncated); return 0; } /* That's what the linker manual says. */ if (PRIV (rec_length) > EOBJ_S_C_MAXRECSIZ) { bfd_set_error (bfd_error_file_truncated); return 0; } /* Adjust the buffer. */ if (PRIV (rec_length) > PRIV (buf_size)) { PRIV (vms_buf) = bfd_realloc_or_free (vms_buf, (bfd_size_type) PRIV (rec_length)); vms_buf = PRIV (vms_buf); if (vms_buf == 0) return -1; PRIV (buf_size) = PRIV (rec_length); } /* Read the remaining record. */ remaining = PRIV (rec_length) - test_len + test_start; #if VMS_DEBUG vms_debug (10, "bfd_bread remaining %d\n", remaining); #endif if (bfd_bread (vms_buf + test_len, (bfd_size_type) remaining, abfd) != (bfd_size_type) remaining) { bfd_set_error (bfd_error_file_truncated); return 0; } PRIV (vms_rec) = vms_buf + test_start; } #if VMS_DEBUG vms_debug (11, "bfd_bread rec_length %d\n", PRIV (rec_length)); #endif return PRIV (rec_length); } /* Get next vms record from file update vms_rec and rec_length to new (remaining) values. */ int _bfd_vms_next_record (bfd * abfd) { #if VMS_DEBUG vms_debug (8, "_bfd_vms_next_record (len %d, size %d)\n", PRIV (rec_length), PRIV (rec_size)); #endif if (PRIV (rec_length) > 0) PRIV (vms_rec) += PRIV (rec_size); else { if (_bfd_vms_get_record (abfd) <= 0) return -1; } if (!PRIV (vms_rec) || !PRIV (vms_buf) || PRIV (vms_rec) >= (PRIV (vms_buf) + PRIV (buf_size))) return -1; if (PRIV (is_vax)) { PRIV (rec_type) = *(PRIV (vms_rec)); PRIV (rec_size) = PRIV (rec_length); } else _bfd_vms_get_header_values (abfd, PRIV (vms_rec), &PRIV (rec_type), &PRIV (rec_size)); PRIV (rec_length) -= PRIV (rec_size); #if VMS_DEBUG vms_debug (8, "_bfd_vms_next_record: rec %p, size %d, length %d, type %d\n", PRIV (vms_rec), PRIV (rec_size), PRIV (rec_length), PRIV (rec_type)); #endif return PRIV (rec_type); } /* Copy sized string (string with fixed length) to new allocated area size is string length (size of record) */ char * _bfd_vms_save_sized_string (unsigned char *str, int size) { char *newstr = bfd_malloc ((bfd_size_type) size + 1); if (newstr == NULL) return NULL; strncpy (newstr, (char *) str, (size_t) size); newstr[size] = 0; return newstr; } /* Copy counted string (string with length at first byte) to new allocated area ptr points to length byte on entry */ char * _bfd_vms_save_counted_string (unsigned char *ptr) { int len = *ptr++; return _bfd_vms_save_sized_string (ptr, len); } /* Stack routines for vms ETIR commands. */ /* Push value and section index. */ void _bfd_vms_push (bfd * abfd, uquad val, int psect) { static int last_psect; #if VMS_DEBUG vms_debug (4, "<push %016lx (%d) at %d>\n", val, psect, PRIV (stackptr)); #endif if (psect >= 0) last_psect = psect; PRIV (stack[PRIV (stackptr)]).value = val; PRIV (stack[PRIV (stackptr)]).psect = last_psect; PRIV (stackptr)++; if (PRIV (stackptr) >= STACKSIZE) { bfd_set_error (bfd_error_bad_value); (*_bfd_error_handler) (_("Stack overflow (%d) in _bfd_vms_push"), PRIV (stackptr)); exit (1); } } /* Pop value and section index. */ uquad _bfd_vms_pop (bfd * abfd, int *psect) { uquad value; if (PRIV (stackptr) == 0) { bfd_set_error (bfd_error_bad_value); (*_bfd_error_handler) (_("Stack underflow in _bfd_vms_pop")); exit (1); } PRIV (stackptr)--; value = PRIV (stack[PRIV (stackptr)]).value; if ((psect != NULL) && (PRIV (stack[PRIV (stackptr)]).psect >= 0)) *psect = PRIV (stack[PRIV (stackptr)]).psect; #if VMS_DEBUG vms_debug (4, "<pop %016lx(%d)>\n", value, PRIV (stack[PRIV (stackptr)]).psect); #endif return value; } /* Object file output functions. */ /* GAS tends to write sections in little chunks (bfd_set_section_contents) which we can't use directly. So we save the little chunks in linked lists (one per section) and write them later. */ /* Add a new vms_section structure to vms_section_table - forward chaining -. */ static vms_section * add_new_contents (bfd * abfd, sec_ptr section) { vms_section *sptr, *newptr; sptr = PRIV (vms_section_table)[section->index]; if (sptr != NULL) return sptr; newptr = bfd_alloc (abfd, (bfd_size_type) sizeof (vms_section)); if (newptr == NULL) return NULL; newptr->contents = bfd_alloc (abfd, section->size); if (newptr->contents == NULL) return NULL; newptr->offset = 0; newptr->size = section->size; newptr->next = 0; PRIV (vms_section_table)[section->index] = newptr; return newptr; } /* Save section data & offset to a vms_section structure vms_section_table[] holds the vms_section chain. */ bfd_boolean _bfd_save_vms_section (bfd * abfd, sec_ptr section, const void * data, file_ptr offset, bfd_size_type count) { vms_section *sptr; if (section->index >= VMS_SECTION_COUNT) { bfd_set_error (bfd_error_nonrepresentable_section); return FALSE; } if (count == (bfd_size_type)0) return TRUE; sptr = add_new_contents (abfd, section); if (sptr == NULL) return FALSE; memcpy (sptr->contents + offset, data, (size_t) count); return TRUE; } /* Get vms_section pointer to saved contents for section # index */ vms_section * _bfd_get_vms_section (bfd * abfd, int index) { if (index >= VMS_SECTION_COUNT) { bfd_set_error (bfd_error_nonrepresentable_section); return NULL; } return PRIV (vms_section_table)[index]; } /* Object output routines. */ /* Begin new record or record header write 2 bytes rectype write 2 bytes record length (filled in at flush) write 2 bytes header type (ommitted if rechead == -1). */ void _bfd_vms_output_begin (bfd * abfd, int rectype, int rechead) { #if VMS_DEBUG vms_debug (6, "_bfd_vms_output_begin (type %d, head %d)\n", rectype, rechead); #endif _bfd_vms_output_short (abfd, (unsigned int) rectype); /* Save current output position to fill in length later. */ if (PRIV (push_level) > 0) PRIV (length_pos) = PRIV (output_size); #if VMS_DEBUG vms_debug (6, "_bfd_vms_output_begin: length_pos = %d\n", PRIV (length_pos)); #endif /* Placeholder for length. */ _bfd_vms_output_short (abfd, 0); if (rechead != -1) _bfd_vms_output_short (abfd, (unsigned int) rechead); } /* Set record/subrecord alignment. */ void _bfd_vms_output_alignment (bfd * abfd, int alignto) { #if VMS_DEBUG vms_debug (6, "_bfd_vms_output_alignment (%d)\n", alignto); #endif PRIV (output_alignment) = alignto; } /* Prepare for subrecord fields. */ void _bfd_vms_output_push (bfd * abfd) { #if VMS_DEBUG vms_debug (6, "vms_output_push (pushed_size = %d)\n", PRIV (output_size)); #endif PRIV (push_level)++; PRIV (pushed_size) = PRIV (output_size); } /* End of subrecord fields. */ void _bfd_vms_output_pop (bfd * abfd) { #if VMS_DEBUG vms_debug (6, "vms_output_pop (pushed_size = %d)\n", PRIV (pushed_size)); #endif _bfd_vms_output_flush (abfd); PRIV (length_pos) = 2; #if VMS_DEBUG vms_debug (6, "vms_output_pop: length_pos = %d\n", PRIV (length_pos)); #endif PRIV (pushed_size) = 0; PRIV (push_level)--; } /* Flush unwritten output, ends current record. */ void _bfd_vms_output_flush (bfd * abfd) { int real_size = PRIV (output_size); int aligncount; int length; #if VMS_DEBUG vms_debug (6, "_bfd_vms_output_flush (real_size = %d, pushed_size %d at lenpos %d)\n", real_size, PRIV (pushed_size), PRIV (length_pos)); #endif if (PRIV (push_level) > 0) length = real_size - PRIV (pushed_size); else length = real_size; if (length == 0) return; aligncount = (PRIV (output_alignment) - (length % PRIV (output_alignment))) % PRIV (output_alignment); #if VMS_DEBUG vms_debug (6, "align: adding %d bytes\n", aligncount); #endif while (aligncount-- > 0) { PRIV (output_buf)[real_size++] = 0; length++; } /* Put length to buffer. */ PRIV (output_size) = PRIV (length_pos); _bfd_vms_output_short (abfd, (unsigned int) length); if (PRIV (push_level) == 0) { if (0 #ifndef VMS /* Write length first, see FF_FOREIGN in the input routines. */ || fwrite (PRIV (output_buf) + 2, 2, 1, (FILE *) abfd->iostream) != 1 #endif || (real_size != 0 && fwrite (PRIV (output_buf), (size_t) real_size, 1, (FILE *) abfd->iostream) != 1)) /* FIXME: Return error status. */ abort (); PRIV (output_size) = 0; } else { PRIV (output_size) = real_size; PRIV (pushed_size) = PRIV (output_size); } } /* End record output. */ void _bfd_vms_output_end (bfd * abfd) { #if VMS_DEBUG vms_debug (6, "_bfd_vms_output_end\n"); #endif _bfd_vms_output_flush (abfd); } /* Check remaining buffer size Return what's left. */ int _bfd_vms_output_check (bfd * abfd, int size) { #if VMS_DEBUG vms_debug (6, "_bfd_vms_output_check (%d)\n", size); #endif return (MAX_OUTREC_SIZE - (PRIV (output_size) + size + MIN_OUTREC_LUFT)); } /* Output byte (8 bit) value. */ void _bfd_vms_output_byte (bfd * abfd, unsigned int value) { #if VMS_DEBUG vms_debug (6, "_bfd_vms_output_byte (%02x)\n", value); #endif bfd_put_8 (abfd, value & 0xff, PRIV (output_buf) + PRIV (output_size)); PRIV (output_size) += 1; } /* Output short (16 bit) value. */ void _bfd_vms_output_short (bfd * abfd, unsigned int value) { #if VMS_DEBUG vms_debug (6, "_bfd_vms_output_short (%04x)\n", value); #endif bfd_put_16 (abfd, (bfd_vma) value & 0xffff, PRIV (output_buf) + PRIV (output_size)); PRIV (output_size) += 2; } /* Output long (32 bit) value. */ void _bfd_vms_output_long (bfd * abfd, unsigned long value) { #if VMS_DEBUG vms_debug (6, "_bfd_vms_output_long (%08lx)\n", value); #endif bfd_put_32 (abfd, (bfd_vma) value, PRIV (output_buf) + PRIV (output_size)); PRIV (output_size) += 4; } /* Output quad (64 bit) value. */ void _bfd_vms_output_quad (bfd * abfd, uquad value) { #if VMS_DEBUG vms_debug (6, "_bfd_vms_output_quad (%016lx)\n", value); #endif bfd_put_64(abfd, value, PRIV (output_buf) + PRIV (output_size)); PRIV (output_size) += 8; } /* Output c-string as counted string. */ void _bfd_vms_output_counted (bfd * abfd, char *value) { int len; #if VMS_DEBUG vms_debug (6, "_bfd_vms_output_counted (%s)\n", value); #endif len = strlen (value); if (len == 0) { (*_bfd_error_handler) (_("_bfd_vms_output_counted called with zero bytes")); return; } if (len > 255) { (*_bfd_error_handler) (_("_bfd_vms_output_counted called with too many bytes")); return; } _bfd_vms_output_byte (abfd, (unsigned int) len & 0xff); _bfd_vms_output_dump (abfd, (unsigned char *) value, len); } /* Output character area. */ void _bfd_vms_output_dump (bfd * abfd, unsigned char *data, int length) { #if VMS_DEBUG vms_debug (6, "_bfd_vms_output_dump (%d)\n", length); #endif if (length == 0) return; memcpy (PRIV (output_buf) + PRIV (output_size), data, (size_t) length); PRIV (output_size) += length; } /* Output count bytes of value. */ void _bfd_vms_output_fill (bfd * abfd, int value, int count) { #if VMS_DEBUG vms_debug (6, "_bfd_vms_output_fill (val %02x times %d)\n", value, count); #endif if (count == 0) return; memset (PRIV (output_buf) + PRIV (output_size), value, (size_t) count); PRIV (output_size) += count; } /* This hash routine borrowed from GNU-EMACS, and strengthened slightly. ERY. */ static int hash_string (const char *ptr) { const unsigned char *p = (unsigned char *) ptr; const unsigned char *end = p + strlen (ptr); unsigned char c; int hash = 0; while (p != end) { c = *p++; hash = ((hash << 3) + (hash << 15) + (hash >> 28) + c); } return hash; } /* Generate a length-hashed VMS symbol name (limited to maxlen chars). */ char * _bfd_vms_length_hash_symbol (bfd * abfd, const char *in, int maxlen) { long int result; int in_len; char *new_name; const char *old_name; int i; static char outbuf[EOBJ_S_C_SYMSIZ+1]; char *out = outbuf; #if VMS_DEBUG vms_debug (4, "_bfd_vms_length_hash_symbol \"%s\"\n", in); #endif if (maxlen > EOBJ_S_C_SYMSIZ) maxlen = EOBJ_S_C_SYMSIZ; /* Save this for later. */ new_name = out; /* We may need to truncate the symbol, save the hash for later. */ in_len = strlen (in); result = (in_len > maxlen) ? hash_string (in) : 0; old_name = in; /* Do the length checking. */ if (in_len <= maxlen) i = in_len; else { if (PRIV (flag_hash_long_names)) i = maxlen-9; else i = maxlen; } strncpy (out, in, (size_t) i); in += i; out += i; if ((in_len > maxlen) && PRIV (flag_hash_long_names)) sprintf (out, "_%08lx", result); else *out = 0; #if VMS_DEBUG vms_debug (4, "--> [%d]\"%s\"\n", strlen (outbuf), outbuf); #endif if (in_len > maxlen && PRIV (flag_hash_long_names) && PRIV (flag_show_after_trunc)) printf (_("Symbol %s replaced by %s\n"), old_name, new_name); return outbuf; } /* Allocate and initialize a new symbol. */ static asymbol * new_symbol (bfd * abfd, char *name) { asymbol *symbol; #if VMS_DEBUG _bfd_vms_debug (7, "new_symbol %s\n", name); #endif symbol = bfd_make_empty_symbol (abfd); if (symbol == 0) return symbol; symbol->name = name; symbol->section = bfd_make_section (abfd, BFD_UND_SECTION_NAME); return symbol; } /* Allocate and enter a new private symbol. */ vms_symbol_entry * _bfd_vms_enter_symbol (bfd * abfd, char *name) { vms_symbol_entry *entry; #if VMS_DEBUG _bfd_vms_debug (6, "_bfd_vms_enter_symbol %s\n", name); #endif entry = (vms_symbol_entry *) bfd_hash_lookup (PRIV (vms_symbol_table), name, FALSE, FALSE); if (entry == 0) { #if VMS_DEBUG _bfd_vms_debug (8, "creating hash entry for %s\n", name); #endif entry = (vms_symbol_entry *) bfd_hash_lookup (PRIV (vms_symbol_table), name, TRUE, FALSE); if (entry != 0) { asymbol *symbol; symbol = new_symbol (abfd, name); if (symbol != 0) { entry->symbol = symbol; PRIV (gsd_sym_count)++; abfd->symcount++; } else entry = 0; } else (*_bfd_error_handler) (_("failed to enter %s"), name); } else { #if VMS_DEBUG _bfd_vms_debug (8, "found hash entry for %s\n", name); #endif } #if VMS_DEBUG _bfd_vms_debug (7, "-> entry %p, entry->symbol %p\n", entry, entry->symbol); #endif return entry; }
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