X-Git-Url: https://oss.titaniummirror.com/gitweb?p=msp430-binutils.git;a=blobdiff_plain;f=bfd%2Fvms-misc.c;fp=bfd%2Fvms-misc.c;h=21816587ef458f7a32add36a53ce3e52ea287b26;hp=1492f146ff0e5316713f8716dca6c19e362a1ba1;hb=88750007d7869f178f0ba528f41efd3b74c424cf;hpb=6df9443a374e2b81278c61b8afc0a1eef7db280b diff --git a/bfd/vms-misc.c b/bfd/vms-misc.c index 1492f14..2181658 100644 --- a/bfd/vms-misc.c +++ b/bfd/vms-misc.c @@ -1,7 +1,9 @@ -/* vms-misc.c -- Miscellaneous functions for VAX (openVMS/VAX) and +/* vms-misc.c -- BFD back-end for VMS/VAX (openVMS/VAX) and EVAX (openVMS/Alpha) files. Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, - 2007 Free Software Foundation, Inc. + 2007, 2008, 2009 Free Software Foundation, Inc. + + Miscellaneous functions. Written by Klaus K"ampf (kkaempf@rmi.de) @@ -30,22 +32,29 @@ #include "libbfd.h" #include "vms.h" - + +#define MIN(a,b) ((a) < (b) ? (a) : (b)) + +static int hash_string PARAMS ((const char *)); +static asymbol *new_symbol PARAMS ((bfd *, char *)); +static void maybe_adjust_record_pointer_for_object PARAMS ((bfd *)); +static int vms_get_remaining_object_record PARAMS ((bfd *, int )); +static int vms_get_remaining_image_record PARAMS ((bfd *, int )); + #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 +/* 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: + 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 + Level is also indentation level. Indentation is performed if level > 0. */ void @@ -167,22 +176,23 @@ _bfd_vms_hash_newfunc (struct bfd_hash_entry *entry, /* Object file input functions. */ -/* Return type and length from record header (buf) on Alpha. */ +/* Return type and size from record header (buf) on Alpha. */ void _bfd_vms_get_header_values (bfd * abfd ATTRIBUTE_UNUSED, unsigned char *buf, int *type, - int *length) + int *size) { - if (type != 0) + if (type) *type = bfd_getl16 (buf); - buf += 2; - if (length != 0) - *length = bfd_getl16 (buf); + + if (size) + *size = bfd_getl16 (buf+2); #if VMS_DEBUG - vms_debug (10, "_bfd_vms_get_header_values type %x, length %x\n", (type?*type:0), (length?*length:0)); + vms_debug (10, "_bfd_vms_get_header_values type %x, size %x\n", + type ? *type : 0, size ? *size : 0); #endif } @@ -193,237 +203,341 @@ _bfd_vms_get_header_values (bfd * abfd ATTRIBUTE_UNUSED, 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. + 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 + 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. + record size 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, the DEC implementation of TCP/IP. - The vms format repeats the length at bytes 2 & 3 of every record. + The VMS format repeats the size 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 + 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. + Reading is always done in 2 steps: + 1. first just the record header is read and the size extracted, + 2. then the read buffer is adjusted and the remaining bytes are + read in. + + All file I/O is done on even file positions. */ - All file i/o is always done on even file positions. */ +#define VMS_OBJECT_ADJUSTMENT 2 + +static void +maybe_adjust_record_pointer_for_object (bfd *abfd) +{ + /* Set the file format once for all on the first invocation. */ + if (PRIV (file_format) == FF_UNKNOWN) + { + if (PRIV (vms_rec)[0] == PRIV (vms_rec)[4] + && PRIV (vms_rec)[1] == PRIV (vms_rec)[5]) + PRIV (file_format) = FF_FOREIGN; + else + PRIV (file_format) = FF_NATIVE; + } + + /* The adjustment is needed only in an Unix environment. */ + if (PRIV (file_format) == FF_FOREIGN) + PRIV (vms_rec) += VMS_OBJECT_ADJUSTMENT; +} + +/* Get first record from file and return the file type. */ int -_bfd_vms_get_record (bfd * abfd) +_bfd_vms_get_first_record (bfd *abfd) { - int test_len, test_start, remaining; - unsigned char *vms_buf; + unsigned int test_len; #if VMS_DEBUG - vms_debug (8, "_bfd_vms_get_record\n"); + vms_debug (8, "_bfd_vms_get_first_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 (is_vax)) + test_len = 0; + else + /* Minimum is 6 bytes for objects (2 bytes size, 2 bytes record id, + 2 bytes size repeated) and 12 bytes for images (4 bytes major id, + 4 bytes minor id, 4 bytes length). */ + test_len = 12; + /* Size the main buffer. */ 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); + /* On VAX there's no size information in the record, so + start with OBJ_S_C_MAXRECSIZ. */ + bfd_size_type amt = (test_len ? test_len : OBJ_S_C_MAXRECSIZ); + PRIV (vms_buf) = (unsigned char *) bfd_malloc (amt); PRIV (buf_size) = amt; } - vms_buf = PRIV (vms_buf); + /* Initialize the record pointer. */ + PRIV (vms_rec) = PRIV (vms_buf); - if (vms_buf == 0) - return -1; - - switch (PRIV (file_format)) + /* We only support modules on VAX. */ + if (PRIV (is_vax)) { - 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; + if (vms_get_remaining_object_record (abfd, test_len) <= 0) + return FT_UNKNOWN; + +#if VMS_DEBUG + vms_debug (2, "file type is VAX module\n"); +#endif + + return FT_MODULE; } - /* Skip odd alignment byte. */ + if (bfd_bread (PRIV (vms_buf), test_len, abfd) != test_len) + { + bfd_set_error (bfd_error_file_truncated); + return FT_UNKNOWN; + } - if (bfd_tell (abfd) & 1) + /* Is it an image? */ + if ((bfd_getl32 (PRIV (vms_rec)) == EIHD_S_K_MAJORID) + && (bfd_getl32 (PRIV (vms_rec) + 4) == EIHD_S_K_MINORID)) { - if (bfd_bread (PRIV (vms_buf), (bfd_size_type) 1, abfd) != 1) - { - bfd_set_error (bfd_error_file_truncated); - return 0; - } + if (vms_get_remaining_image_record (abfd, test_len) <= 0) + return FT_UNKNOWN; + +#if VMS_DEBUG + vms_debug (2, "file type is image\n"); +#endif + + return FT_IMAGE; } - /* 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)) + /* Assume it's a module and adjust record pointer if necessary. */ + maybe_adjust_record_pointer_for_object (abfd); + + /* But is it really a module? */ + if (bfd_getl16 (PRIV (vms_rec)) <= EOBJ_S_C_MAXRECTYP + && bfd_getl16 (PRIV (vms_rec) + 2) <= EOBJ_S_C_MAXRECSIZ) { - bfd_set_error (bfd_error_file_truncated); - return 0; + if (vms_get_remaining_object_record (abfd, test_len) <= 0) + return FT_UNKNOWN; + +#if VMS_DEBUG + vms_debug (2, "file type is module\n"); +#endif + + return FT_MODULE; } - /* 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]) +#if VMS_DEBUG + vms_debug (2, "file type is unknown\n"); +#endif + + return FT_UNKNOWN; +} + +/* Implement step #1 of the object record reading procedure. + Return the record type or -1 on failure. */ + +int +_bfd_vms_get_object_record (bfd *abfd) +{ + unsigned int test_len; + int type; + +#if VMS_DEBUG + vms_debug (8, "_bfd_vms_get_obj_record\n"); +#endif + + if (PRIV (is_vax)) + test_len = 0; + else + { + /* See _bfd_vms_get_first_record. */ + test_len = 6; + + /* Skip odd alignment byte. */ + if (bfd_tell (abfd) & 1) { - PRIV (file_format) = FF_FOREIGN; /* Y: foreign environment. */ - test_start = 2; + if (bfd_bread (PRIV (vms_buf), 1, abfd) != 1) + { + bfd_set_error (bfd_error_file_truncated); + return -1; + } } - else + + /* Read the record header */ + if (bfd_bread (PRIV (vms_buf), test_len, abfd) != test_len) { - PRIV (file_format) = FF_NATIVE; /* N: native environment. */ - test_start = 0; + bfd_set_error (bfd_error_file_truncated); + return -1; } + + /* Reset the record pointer. */ + PRIV (vms_rec) = PRIV (vms_buf); + maybe_adjust_record_pointer_for_object (abfd); } + if (vms_get_remaining_object_record (abfd, test_len) <= 0) + return -1; + + if (PRIV (is_vax)) + type = PRIV (vms_rec) [0]; + else + type = bfd_getl16 (PRIV (vms_rec)); + +#if VMS_DEBUG + vms_debug (8, "_bfd_vms_get_obj_record: rec %p, size %d, type %d\n", + PRIV (vms_rec), PRIV (rec_size), type); +#endif + + return type; +} + +/* Implement step #2 of the object record reading procedure. + Return the size of the record or 0 on failure. */ + +static int +vms_get_remaining_object_record (bfd *abfd, int read_so_far) +{ +#if VMS_DEBUG + vms_debug (8, "vms_get_remaining_obj_record\n"); +#endif + if (PRIV (is_vax)) { - PRIV (rec_length) = bfd_bread (vms_buf, (bfd_size_type) PRIV (buf_size), - abfd); - if (PRIV (rec_length) <= 0) + if (read_so_far != 0) + abort (); + + PRIV (rec_size) = bfd_bread (PRIV (vms_buf), PRIV (buf_size), abfd); + + if (PRIV (rec_size) <= 0) { bfd_set_error (bfd_error_file_truncated); return 0; } - PRIV (vms_rec) = vms_buf; + + /* Reset the record pointer. */ + PRIV (vms_rec) = PRIV (vms_buf); } else { - /* Alpha. */ - /* Extract vms record length. */ + unsigned int to_read; - _bfd_vms_get_header_values (abfd, vms_buf + test_start, NULL, - & PRIV (rec_length)); + /* Extract record size. */ + PRIV (rec_size) = bfd_getl16 (PRIV (vms_rec) + 2); - if (PRIV (rec_length) <= 0) + if (PRIV (rec_size) <= 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) + if (PRIV (rec_size) > EOBJ_S_C_MAXRECSIZ) { bfd_set_error (bfd_error_file_truncated); return 0; } - /* Adjust the buffer. */ + /* Take into account object adjustment. */ + to_read = PRIV (rec_size); + if (PRIV (file_format) == FF_FOREIGN) + to_read += VMS_OBJECT_ADJUSTMENT; - if (PRIV (rec_length) > PRIV (buf_size)) + /* Adjust the buffer. */ + if (to_read > PRIV (buf_size)) { - PRIV (vms_buf) = bfd_realloc (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); + PRIV (vms_buf) + = (unsigned char *) bfd_realloc (PRIV (vms_buf), to_read); + if (PRIV (vms_buf) == NULL) + return 0; + PRIV (buf_size) = to_read; } /* Read the remaining record. */ - remaining = PRIV (rec_length) - test_len + test_start; + to_read -= read_so_far; #if VMS_DEBUG - vms_debug (10, "bfd_bread remaining %d\n", remaining); + vms_debug (8, "vms_get_remaining_obj_record: to_read %d\n", to_read); #endif - if (bfd_bread (vms_buf + test_len, (bfd_size_type) remaining, abfd) != - (bfd_size_type) remaining) + + if (bfd_bread (PRIV (vms_buf) + read_so_far, to_read, abfd) != to_read) { bfd_set_error (bfd_error_file_truncated); return 0; } - PRIV (vms_rec) = vms_buf + test_start; + + /* Reset the record pointer. */ + PRIV (vms_rec) = PRIV (vms_buf); + maybe_adjust_record_pointer_for_object (abfd); } #if VMS_DEBUG - vms_debug (11, "bfd_bread rec_length %d\n", PRIV (rec_length)); + vms_debug (8, "vms_get_remaining_obj_record: size %d\n", PRIV (rec_size)); #endif - return PRIV (rec_length); + return PRIV (rec_size); } -/* Get next vms record from file - update vms_rec and rec_length to new (remaining) values. */ +/* Implement step #2 of the record reading procedure for images. + Return the size of the record or 0 on failure. */ -int -_bfd_vms_next_record (bfd * abfd) +static int +vms_get_remaining_image_record (bfd *abfd, int read_so_far) { -#if VMS_DEBUG - vms_debug (8, "_bfd_vms_next_record (len %d, size %d)\n", - PRIV (rec_length), PRIV (rec_size)); -#endif + unsigned int to_read; + int remaining; - if (PRIV (rec_length) > 0) - PRIV (vms_rec) += PRIV (rec_size); - else + /* Extract record size. */ + PRIV (rec_size) = bfd_getl32 (PRIV (vms_rec) + EIHD_S_L_SIZE); + + if (PRIV (rec_size) > PRIV (buf_size)) { - if (_bfd_vms_get_record (abfd) <= 0) - return -1; + PRIV (vms_buf) = bfd_realloc (PRIV (vms_buf), PRIV (rec_size)); + + if (PRIV (vms_buf) == NULL) + { + bfd_set_error (bfd_error_no_memory); + return 0; + } + + PRIV (buf_size) = PRIV (rec_size); } - if (!PRIV (vms_rec) || !PRIV (vms_buf) - || PRIV (vms_rec) >= (PRIV (vms_buf) + PRIV (buf_size))) - return -1; + /* Read the remaining record. */ + remaining = PRIV (rec_size) - read_so_far; + to_read = MIN (VMS_BLOCK_SIZE - read_so_far, remaining); - if (PRIV (is_vax)) + while (remaining > 0) { - 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)); + if (bfd_bread (PRIV (vms_buf) + read_so_far, to_read, abfd) != to_read) + { + bfd_set_error (bfd_error_file_truncated); + return 0; + } - PRIV (rec_length) -= PRIV (rec_size); + read_so_far += to_read; + remaining -= to_read; -#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 + /* Eat trailing 0xff's. */ + if (remaining > 0) + while (PRIV (vms_buf) [read_so_far - 1] == 0xff) + read_so_far--; + + to_read = MIN (VMS_BLOCK_SIZE, remaining); + } + + /* Reset the record pointer. */ + PRIV (vms_rec) = PRIV (vms_buf); - return PRIV (rec_type); + return PRIV (rec_size); } - -/* Copy sized string (string with fixed length) to new allocated area - size is string length (size of record) */ + +/* Copy sized string (string with fixed size) to new allocated area + size is string size (size of record) */ char * _bfd_vms_save_sized_string (unsigned char *str, int size) @@ -438,8 +552,8 @@ _bfd_vms_save_sized_string (unsigned char *str, int size) return newstr; } -/* Copy counted string (string with length at first byte) to new allocated area - ptr points to length byte on entry */ +/* Copy counted string (string with size at first byte) to new allocated area + ptr points to size byte on entry */ char * _bfd_vms_save_counted_string (unsigned char *ptr) @@ -501,83 +615,12 @@ _bfd_vms_pop (bfd * abfd, int *psect) 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). */ + write 2 bytes header type (ommitted if rechead == -1). */ void _bfd_vms_output_begin (bfd * abfd, int rectype, int rechead) @@ -691,13 +734,11 @@ _bfd_vms_output_flush (bfd * abfd) if (PRIV (push_level) == 0) { -#ifndef VMS - /* Write length first, see FF_FOREIGN in the input routines. */ - fwrite (PRIV (output_buf) + 2, 2, 1, (FILE *) abfd->iostream); -#endif - fwrite (PRIV (output_buf), (size_t) real_size, 1, - (FILE *) abfd->iostream); - + /* File is open in undefined (UDF) format on VMS, but ultimately will be + converted to variable length (VAR) format. VAR format has a length + word first which must be explicitly output in UDF format. */ + bfd_bwrite (PRIV (output_buf) + 2, 2, abfd); + bfd_bwrite (PRIV (output_buf), (size_t) real_size, abfd); PRIV (output_size) = 0; } else @@ -870,7 +911,7 @@ hash_string (const char *ptr) char * _bfd_vms_length_hash_symbol (bfd * abfd, const char *in, int maxlen) { - long int result; + unsigned long result; int in_len; char *new_name; const char *old_name; @@ -943,7 +984,7 @@ new_symbol (bfd * abfd, char *name) if (symbol == 0) return symbol; symbol->name = name; - symbol->section = bfd_make_section (abfd, BFD_UND_SECTION_NAME); + symbol->section = (asection *)(unsigned long)-1; return symbol; }