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Diffstat (limited to 'binutils-2.24/bfd/mmo.c')
| -rw-r--r-- | binutils-2.24/bfd/mmo.c | 3285 |
1 files changed, 0 insertions, 3285 deletions
diff --git a/binutils-2.24/bfd/mmo.c b/binutils-2.24/bfd/mmo.c deleted file mode 100644 index cd7b0fc6..00000000 --- a/binutils-2.24/bfd/mmo.c +++ /dev/null @@ -1,3285 +0,0 @@ -/* BFD back-end for mmo objects (MMIX-specific object-format). - Copyright 2001-2013 Free Software Foundation, Inc. - Written by Hans-Peter Nilsson (hp@bitrange.com). - Infrastructure and other bits originally copied from srec.c and - binary.c. - - This file is part of BFD, the Binary File Descriptor library. - - 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. */ - - -/* -SECTION - mmo backend - - The mmo object format is used exclusively together with Professor - Donald E.@: Knuth's educational 64-bit processor MMIX. The simulator - @command{mmix} which is available at - @url{http://www-cs-faculty.stanford.edu/~knuth/programs/mmix.tar.gz} - understands this format. That package also includes a combined - assembler and linker called @command{mmixal}. The mmo format has - no advantages feature-wise compared to e.g. ELF. It is a simple - non-relocatable object format with no support for archives or - debugging information, except for symbol value information and - line numbers (which is not yet implemented in BFD). See - @url{http://www-cs-faculty.stanford.edu/~knuth/mmix.html} for more - information about MMIX. The ELF format is used for intermediate - object files in the BFD implementation. - -@c We want to xref the symbol table node. A feature in "chew" -@c requires that "commands" do not contain spaces in the -@c arguments. Hence the hyphen in "Symbol-table". -@menu -@* File layout:: -@* Symbol-table:: -@* mmo section mapping:: -@end menu - -INODE -File layout, Symbol-table, mmo, mmo -SUBSECTION - File layout - - The mmo file contents is not partitioned into named sections as - with e.g.@: ELF. Memory areas is formed by specifying the - location of the data that follows. Only the memory area - @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} is executable, so - it is used for code (and constants) and the area - @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} is used for - writable data. @xref{mmo section mapping}. - - There is provision for specifying ``special data'' of 65536 - different types. We use type 80 (decimal), arbitrarily chosen the - same as the ELF <<e_machine>> number for MMIX, filling it with - section information normally found in ELF objects. @xref{mmo - section mapping}. - - Contents is entered as 32-bit words, xor:ed over previous - contents, always zero-initialized. A word that starts with the - byte @samp{0x98} forms a command called a @samp{lopcode}, where - the next byte distinguished between the thirteen lopcodes. The - two remaining bytes, called the @samp{Y} and @samp{Z} fields, or - the @samp{YZ} field (a 16-bit big-endian number), are used for - various purposes different for each lopcode. As documented in - @url{http://www-cs-faculty.stanford.edu/~knuth/mmixal-intro.ps.gz}, - the lopcodes are: - - @table @code - @item lop_quote - 0x98000001. The next word is contents, regardless of whether it - starts with 0x98 or not. - - @item lop_loc - 0x9801YYZZ, where @samp{Z} is 1 or 2. This is a location - directive, setting the location for the next data to the next - 32-bit word (for @math{Z = 1}) or 64-bit word (for @math{Z = 2}), - plus @math{Y * 2^56}. Normally @samp{Y} is 0 for the text segment - and 2 for the data segment. - - @item lop_skip - 0x9802YYZZ. Increase the current location by @samp{YZ} bytes. - - @item lop_fixo - 0x9803YYZZ, where @samp{Z} is 1 or 2. Store the current location - as 64 bits into the location pointed to by the next 32-bit - (@math{Z = 1}) or 64-bit (@math{Z = 2}) word, plus @math{Y * - 2^56}. - - @item lop_fixr - 0x9804YYZZ. @samp{YZ} is stored into the current location plus - @math{2 - 4 * YZ}. - - @item lop_fixrx - 0x980500ZZ. @samp{Z} is 16 or 24. A value @samp{L} derived from - the following 32-bit word are used in a manner similar to - @samp{YZ} in lop_fixr: it is xor:ed into the current location - minus @math{4 * L}. The first byte of the word is 0 or 1. If it - is 1, then @math{L = (@var{lowest 24 bits of word}) - 2^Z}, if 0, - then @math{L = (@var{lowest 24 bits of word})}. - - @item lop_file - 0x9806YYZZ. @samp{Y} is the file number, @samp{Z} is count of - 32-bit words. Set the file number to @samp{Y} and the line - counter to 0. The next @math{Z * 4} bytes contain the file name, - padded with zeros if the count is not a multiple of four. The - same @samp{Y} may occur multiple times, but @samp{Z} must be 0 for - all but the first occurrence. - - @item lop_line - 0x9807YYZZ. @samp{YZ} is the line number. Together with - lop_file, it forms the source location for the next 32-bit word. - Note that for each non-lopcode 32-bit word, line numbers are - assumed incremented by one. - - @item lop_spec - 0x9808YYZZ. @samp{YZ} is the type number. Data until the next - lopcode other than lop_quote forms special data of type @samp{YZ}. - @xref{mmo section mapping}. - - Other types than 80, (or type 80 with a content that does not - parse) is stored in sections named <<.MMIX.spec_data.@var{n}>> - where @var{n} is the @samp{YZ}-type. The flags for such a - sections say not to allocate or load the data. The vma is 0. - Contents of multiple occurrences of special data @var{n} is - concatenated to the data of the previous lop_spec @var{n}s. The - location in data or code at which the lop_spec occurred is lost. - - @item lop_pre - 0x980901ZZ. The first lopcode in a file. The @samp{Z} field forms the - length of header information in 32-bit words, where the first word - tells the time in seconds since @samp{00:00:00 GMT Jan 1 1970}. - - @item lop_post - 0x980a00ZZ. @math{Z > 32}. This lopcode follows after all - content-generating lopcodes in a program. The @samp{Z} field - denotes the value of @samp{rG} at the beginning of the program. - The following @math{256 - Z} big-endian 64-bit words are loaded - into global registers @samp{$G} @dots{} @samp{$255}. - - @item lop_stab - 0x980b0000. The next-to-last lopcode in a program. Must follow - immediately after the lop_post lopcode and its data. After this - lopcode follows all symbols in a compressed format - (@pxref{Symbol-table}). - - @item lop_end - 0x980cYYZZ. The last lopcode in a program. It must follow the - lop_stab lopcode and its data. The @samp{YZ} field contains the - number of 32-bit words of symbol table information after the - preceding lop_stab lopcode. - @end table - - Note that the lopcode "fixups"; <<lop_fixr>>, <<lop_fixrx>> and - <<lop_fixo>> are not generated by BFD, but are handled. They are - generated by <<mmixal>>. - -EXAMPLE - This trivial one-label, one-instruction file: - -| :Main TRAP 1,2,3 - - can be represented this way in mmo: - -| 0x98090101 - lop_pre, one 32-bit word with timestamp. -| <timestamp> -| 0x98010002 - lop_loc, text segment, using a 64-bit address. -| Note that mmixal does not emit this for the file above. -| 0x00000000 - Address, high 32 bits. -| 0x00000000 - Address, low 32 bits. -| 0x98060002 - lop_file, 2 32-bit words for file-name. -| 0x74657374 - "test" -| 0x2e730000 - ".s\0\0" -| 0x98070001 - lop_line, line 1. -| 0x00010203 - TRAP 1,2,3 -| 0x980a00ff - lop_post, setting $255 to 0. -| 0x00000000 -| 0x00000000 -| 0x980b0000 - lop_stab for ":Main" = 0, serial 1. -| 0x203a4040 @xref{Symbol-table}. -| 0x10404020 -| 0x4d206120 -| 0x69016e00 -| 0x81000000 -| 0x980c0005 - lop_end; symbol table contained five 32-bit words. */ - -#include "sysdep.h" -#include "bfd.h" -#include "libbfd.h" -#include "libiberty.h" -#include "elf/mmix.h" -#include "opcode/mmix.h" - -#define LOP 0x98 -#define LOP_QUOTE 0 -#define LOP_LOC 1 -#define LOP_SKIP 2 -#define LOP_FIXO 3 -#define LOP_FIXR 4 -#define LOP_FIXRX 5 -#define LOP_FILE 6 -#define LOP_LINE 7 -#define LOP_SPEC 8 -#define LOP_PRE 9 -#define LOP_POST 10 -#define LOP_STAB 11 -#define LOP_END 12 - -#define LOP_QUOTE_NEXT ((LOP << 24) | (LOP_QUOTE << 16) | 1) -#define SPEC_DATA_SECTION 80 -#define LOP_SPEC_SECTION \ - ((LOP << 24) | (LOP_SPEC << 16) | SPEC_DATA_SECTION) - -/* Must be a power of two. If you change this to be >= 64k, you need a - new test-case; the ld test b-loc64k.d touches chunk-size problem areas. */ -#define MMO_SEC_CONTENTS_CHUNK_SIZE (1 << 15) - -/* An arbitrary number for the maximum length section name size. */ -#define MAX_SECTION_NAME_SIZE (1024 * 1024) - -/* A quite arbitrary number for the maximum length section size. */ -#define MAX_ARTIFICIAL_SECTION_SIZE (1024 * 1024 * 1024) - -#define MMO3_WCHAR 0x80 -#define MMO3_LEFT 0x40 -#define MMO3_MIDDLE 0x20 -#define MMO3_RIGHT 0x10 -#define MMO3_TYPEBITS 0xf -#define MMO3_REGQUAL_BITS 0xf -#define MMO3_UNDEF 2 -#define MMO3_DATA 8 -#define MMO3_SYMBITS 0x2f - -/* Put these everywhere in new code. */ -#define FATAL_DEBUG \ - _bfd_abort (__FILE__, __LINE__, \ - "Internal: Non-debugged code (test-case missing)") - -#define BAD_CASE(x) \ - _bfd_abort (__FILE__, __LINE__, \ - "bad case for " #x) - -enum mmo_sym_type { mmo_reg_sym, mmo_undef_sym, mmo_data_sym, mmo_abs_sym}; - -/* When scanning the mmo file, a linked list of mmo_symbol - structures is built to represent the symbol table (if there is - one). */ - -struct mmo_symbol - { - struct mmo_symbol *next; - char *name; - bfd_vma value; - enum mmo_sym_type sym_type; - unsigned int serno; - }; - -struct mmo_data_list_struct - { - struct mmo_data_list_struct *next; - bfd_vma where; - bfd_size_type size; - bfd_size_type allocated_size; - bfd_byte data[1]; - }; - -typedef struct mmo_data_list_struct mmo_data_list_type; - -struct mmo_symbol_trie - { - struct mmo_symbol_trie *left; - struct mmo_symbol_trie *right; - struct mmo_symbol_trie *middle; - - bfd_byte symchar; - - /* A zero name means there's nothing here. */ - struct mmo_symbol sym; - }; - -/* The mmo tdata information. */ - -struct mmo_data_struct - { - struct mmo_symbol *symbols; - struct mmo_symbol *symtail; - asymbol *csymbols; - - /* File representation of time (NULL) when this file was created. */ - bfd_byte created[4]; - - /* When we're reading bytes recursively, check this occasionally. - Also holds write errors. */ - bfd_boolean have_error; - - /* Max symbol length that may appear in the lop_stab table. Note that - this table might just hold a subset of symbols for not-really large - programs, as it can only be 65536 * 4 bytes large. */ - int max_symbol_length; - - /* Here's the symbol we build in lop_stab. */ - char *lop_stab_symbol; - - /* Index into lop_stab_symbol for the next character when parsing the - symbol information. */ - int symbol_position; - - /* When creating arbitrary sections, we need to count section numbers. */ - int sec_no; - - /* When writing or reading byte-wise, we need to count the bytes - within a 32-bit word. */ - int byte_no; - - /* We also need a buffer to hold the bytes we count reading or writing. */ - bfd_byte buf[4]; - }; - -typedef struct mmo_data_struct tdata_type; - -struct mmo_section_data_struct - { - mmo_data_list_type *head; - mmo_data_list_type *tail; - }; - -#define mmo_section_data(sec) \ - ((struct mmo_section_data_struct *) (sec)->used_by_bfd) - -/* These structures are used in bfd_map_over_sections constructs. */ - -/* Used when writing out sections; all but the register contents section - which is stored in reg_section. */ -struct mmo_write_sec_info - { - asection *reg_section; - bfd_boolean retval; - }; - -/* Used when trying to find a section corresponding to addr. */ -struct mmo_find_sec_info - { - asection *sec; - bfd_vma addr; - }; - -static bfd_boolean mmo_bfd_copy_private_bfd_data (bfd *, bfd *); -static void mmo_write_section_unless_reg_contents (bfd *, asection *, void *); -static void mmo_find_sec_w_addr (bfd *, asection *, void *); -static void mmo_find_sec_w_addr_grow (bfd *, asection *, void *); -static asection *mmo_make_section (bfd *, const char *); -static void mmo_get_symbol_info (bfd *, asymbol *, symbol_info *); -static void mmo_print_symbol (bfd *, void *, asymbol *, - bfd_print_symbol_type); -static void mmo_init (void); -static bfd_boolean mmo_mkobject (bfd *); -static bfd_boolean mmo_scan (bfd *); -static asection *mmo_decide_section (bfd *, bfd_vma); -static asection *mmo_get_generic_spec_data_section (bfd *, int); -static asection *mmo_get_spec_section (bfd *, int); -static INLINE bfd_byte *mmo_get_loc (asection *, bfd_vma, int); -static void mmo_xore_64 (asection *, bfd_vma vma, bfd_vma value); -static void mmo_xore_32 (asection *, bfd_vma vma, unsigned int); -static void mmo_xore_16 (asection *, bfd_vma vma, unsigned int); -static const bfd_target *mmo_object_p (bfd *); -static void mmo_map_set_sizes (bfd *, asection *, void *); -static bfd_boolean mmo_get_symbols (bfd *); -static bfd_boolean mmo_create_symbol (bfd *, const char *, bfd_vma, - enum mmo_sym_type, unsigned int); -static bfd_boolean mmo_get_section_contents (bfd *, asection *, void *, - file_ptr, bfd_size_type); -static long mmo_get_symtab_upper_bound (bfd *); -static long mmo_canonicalize_symtab (bfd *, asymbol **); -static void mmo_get_symbol_info (bfd *, asymbol *, symbol_info *); -static void mmo_print_symbol (bfd *, void *, asymbol *, - bfd_print_symbol_type); -static bfd_boolean mmo_set_section_contents (bfd *, sec_ptr, const void *, - file_ptr, bfd_size_type); -static int mmo_sizeof_headers (bfd *, struct bfd_link_info *); -static bfd_boolean mmo_internal_write_header (bfd *); -static bfd_boolean mmo_internal_write_post (bfd *, int, asection *); -static bfd_boolean mmo_internal_add_3_sym (bfd *, struct mmo_symbol_trie *, - const struct mmo_symbol *); -static unsigned int mmo_internal_3_length (bfd *, struct mmo_symbol_trie *); -static void mmo_internal_3_dump (bfd *, struct mmo_symbol_trie *); -static void mmo_beb128_out (bfd *, int, int); -static bfd_boolean mmo_internal_write_section (bfd *, asection *); -static void mmo_write_tetra (bfd *, unsigned int); -static void mmo_write_tetra_raw (bfd *, unsigned int); -static void mmo_write_octa (bfd *, bfd_vma); -static void mmo_write_octa_raw (bfd *, bfd_vma); -static bfd_boolean mmo_write_chunk (bfd *, const bfd_byte *, unsigned int); -static bfd_boolean mmo_flush_chunk (bfd *); -static bfd_boolean mmo_write_loc_chunk (bfd *, bfd_vma, const bfd_byte *, - unsigned int, bfd_vma *); -static bfd_boolean mmo_write_chunk_list (bfd *, mmo_data_list_type *); -static bfd_boolean mmo_write_loc_chunk_list (bfd *, mmo_data_list_type *); -static bfd_boolean mmo_write_symbols_and_terminator (bfd *); -static flagword mmo_sec_flags_from_bfd_flags (flagword); -static flagword bfd_sec_flags_from_mmo_flags (flagword); -static bfd_byte mmo_get_byte (bfd *); -static void mmo_write_byte (bfd *, bfd_byte); -static bfd_boolean mmo_new_section_hook (bfd *, asection *); -static int mmo_sort_mmo_symbols (const void *, const void *); -static bfd_boolean mmo_write_object_contents (bfd *); -static bfd_boolean mmo_write_section_description (bfd *, asection *); -static bfd_boolean mmo_has_leading_or_trailing_zero_tetra_p (bfd *, - asection *); - -/* Global "const" variables initialized once. Must not depend on - particular input or caller; put such things into the bfd or elsewhere. - Look ma, no static per-invocation data! */ - -static -char valid_mmo_symbol_character_set[/* A-Z a-z (we assume consecutive - codes; sorry EBCDIC:ers!). */ - + 'Z' - 'A' + 1 + 'z' - 'a' + 1 - /* Digits. */ - + 10 - /* ':' and '_'. */ - + 1 + 1 - /* Codes higher than 126. */ - + 256 - 126 - /* Ending zero. */ - + 1]; - - -/* Get section SECNAME or create one if it doesn't exist. When creating - one, new memory for the name is allocated. */ - -static asection * -mmo_make_section (bfd *abfd, const char *secname) -{ - asection *sec = bfd_get_section_by_name (abfd, secname); - - if (sec == NULL) - { - char *newsecname = strdup (secname); - - if (newsecname == NULL) - { - (*_bfd_error_handler) - (_("%s: No core to allocate section name %s\n"), - bfd_get_filename (abfd), secname); - bfd_set_error (bfd_error_system_call); - return NULL; - } - sec = bfd_make_section (abfd, newsecname); - } - - return sec; -} - -/* Nothing to do, but keep as a placeholder if we need it. - Note that state that might differ between bfd:s must not be initialized - here, nor must it be static. Add it to tdata information instead. */ - -static void -mmo_init (void) -{ - static bfd_boolean inited = FALSE; - int i = 0; - int j = 0; - static const char letters[] - = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789:_"; - - if (inited) - return; - inited = TRUE; - - /* Fill in the set of valid symbol characters. */ - strcpy (valid_mmo_symbol_character_set, letters); - i = strlen (letters); - - for (j = 126; j < 256; j++) - valid_mmo_symbol_character_set[i++] = j; -} - -/* Check whether an existing file is an mmo file. */ - -static const bfd_target * -mmo_object_p (bfd *abfd) -{ - struct stat statbuf; - bfd_byte b[4]; - - mmo_init (); - - if (bfd_stat (abfd, &statbuf) < 0 - || bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 - || bfd_bread (b, 4, abfd) != 4) - goto bad_final; - - /* All mmo files are a multiple of four bytes long. - Only recognize version one. */ - if ((statbuf.st_size % 4) != 0 - || b[0] != LOP || b[1] != LOP_PRE || b[2] != 1) - goto bad_format; - - /* Get the last 32-bit word. */ - if (bfd_seek (abfd, (file_ptr) statbuf.st_size - 4, SEEK_SET) != 0 - || bfd_bread (b, 4, abfd) != 4) - goto bad_final; - - /* Check if the file ends in a lop_end lopcode. */ - if (b[0] != LOP || b[1] != LOP_END || ! mmo_mkobject (abfd)) - goto bad_format; - - /* Compute an upper bound on the max symbol length. Not really - important as all of the symbol information can only be 256k. */ - abfd->tdata.mmo_data->max_symbol_length = (b[2] * 256 + b[3]) * 4; - abfd->tdata.mmo_data->lop_stab_symbol - = bfd_malloc (abfd->tdata.mmo_data->max_symbol_length + 1); - - if (abfd->tdata.mmo_data->lop_stab_symbol == NULL) - { - (*_bfd_error_handler) - (_("%s: No core to allocate a symbol %d bytes long\n"), - bfd_get_filename (abfd), abfd->tdata.mmo_data->max_symbol_length); - goto bad_final; - } - - /* Read in everything. */ - if (! mmo_scan (abfd)) - goto bad_format_free; - - if (abfd->symcount > 0) - abfd->flags |= HAS_SYMS; - - /* You'll have to tweak this if you want to use this format for other - arches (not recommended due to its small-size limitations). Look at - the ELF format for how to make it target-generic. */ - if (! bfd_default_set_arch_mach (abfd, bfd_arch_mmix, 0)) - goto bad_format_free; - - return abfd->xvec; - - bad_format_free: - free (abfd->tdata.mmo_data->lop_stab_symbol); - bad_format: - bfd_set_error (bfd_error_wrong_format); - bad_final: - return NULL; -} - -/* Set up the mmo tdata information. */ - -static bfd_boolean -mmo_mkobject (bfd *abfd) -{ - mmo_init (); - - if (abfd->tdata.mmo_data == NULL) - { - time_t created; - - /* All fields are zero-initialized, so we don't have to explicitly - initialize most. */ - tdata_type *tdata = (tdata_type *) bfd_zmalloc (sizeof (tdata_type)); - if (tdata == NULL) - return FALSE; - - created = time (NULL); - bfd_put_32 (abfd, created, tdata->created); - - abfd->tdata.mmo_data = tdata; - } - - return TRUE; -} - -static bfd_boolean -mmo_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd) -{ - if (bfd_get_flavour (ibfd) != bfd_target_mmo_flavour - || bfd_get_flavour (obfd) != bfd_target_mmo_flavour) - return TRUE; - - /* Copy the time the copied-from file was created. If people want the - time the file was last *modified*, they have that in the normal file - information. */ - memcpy (obfd->tdata.mmo_data->created, ibfd->tdata.mmo_data->created, - sizeof (obfd->tdata.mmo_data->created)); - return TRUE; -} - -/* Helper functions for mmo_decide_section, used through - bfd_map_over_sections. */ - -static void -mmo_find_sec_w_addr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *p) -{ - struct mmo_find_sec_info *infop = (struct mmo_find_sec_info *) p; - bfd_vma vma = bfd_get_section_vma (abfd, sec); - - /* Ignore sections that aren't loaded. */ - if ((bfd_get_section_flags (abfd, sec) & (SEC_LOAD | SEC_ALLOC)) - != (SEC_LOAD | SEC_ALLOC)) - return; - - if (infop->addr >= vma && infop->addr < vma + sec->size) - infop->sec = sec; -} - -static void -mmo_find_sec_w_addr_grow (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *p) -{ - struct mmo_find_sec_info *infop = (struct mmo_find_sec_info *) p; - bfd_vma vma = bfd_get_section_vma (abfd, sec); - - /* Ignore sections that aren't loaded. */ - if ((bfd_get_section_flags (abfd, sec) & (SEC_LOAD | SEC_ALLOC)) - != (SEC_LOAD | SEC_ALLOC)) - return; - - if (infop->addr >= vma && infop->addr < vma + MAX_ARTIFICIAL_SECTION_SIZE) - infop->sec = sec; -} - -/* Find a section that corresponds to a VMA. Automatically create .text - or .data and set current section to it, depending on what vma. If we - can't deduce a section, make one up as ".MMIX.sec.N", where N is an - increasing number. */ - -static asection * -mmo_decide_section (bfd *abfd, bfd_vma vma) -{ - asection *sec = NULL; - char sec_name[sizeof (".MMIX.sec.") + 20]; - struct mmo_find_sec_info info; - - info.addr = vma; - info.sec = NULL; - - /* First see if there's a section that would match exactly. */ - bfd_map_over_sections (abfd, mmo_find_sec_w_addr, &info); - - if (info.sec != NULL) - return info.sec; - - /* If there's no such section, try and expand one of the existing ones, - up to a limit. Make sure we have .text and .data before we try that; - create them corresponding to expected addresses and set flags to make - them match the "loaded and with contents" expectation. */ - if ((vma >> 56) == 0) - { - sec = bfd_make_section_old_way (abfd, MMO_TEXT_SECTION_NAME); - - if (sec == NULL) - return NULL; - - if (! sec->user_set_vma && ! bfd_set_section_vma (abfd, sec, vma)) - return NULL; - - if (! bfd_set_section_flags (abfd, sec, - bfd_get_section_flags (abfd, sec) - | SEC_CODE | SEC_LOAD | SEC_ALLOC)) - return NULL; - } - else if ((vma >> 56) == 0x20) - { - sec = bfd_make_section_old_way (abfd, MMO_DATA_SECTION_NAME); - - if (sec == NULL) - return NULL; - - if (! sec->user_set_vma && ! bfd_set_section_vma (abfd, sec, vma)) - return NULL; - - if (! bfd_set_section_flags (abfd, sec, - bfd_get_section_flags (abfd, sec) - | SEC_LOAD | SEC_ALLOC)) - return NULL; - } - - bfd_map_over_sections (abfd, mmo_find_sec_w_addr_grow, &info); - - if (info.sec != NULL) - return info.sec; - - /* If there's still no suitable section, make a new one. */ - sprintf (sec_name, ".MMIX.sec.%d", abfd->tdata.mmo_data->sec_no++); - sec = mmo_make_section (abfd, sec_name); - - if (! sec->user_set_vma && ! bfd_set_section_vma (abfd, sec, vma)) - return NULL; - - if (! bfd_set_section_flags (abfd, sec, - bfd_get_section_flags (abfd, sec) - | SEC_LOAD | SEC_ALLOC)) - return NULL; - return sec; -} - -/* Xor in a 64-bit value VALUE at VMA. */ - -static INLINE void -mmo_xore_64 (asection *sec, bfd_vma vma, bfd_vma value) -{ - bfd_byte *loc = mmo_get_loc (sec, vma, 8); - bfd_vma prev = bfd_get_64 (sec->owner, loc); - - value ^= prev; - bfd_put_64 (sec->owner, value, loc); -} - -/* Xor in a 32-bit value VALUE at VMA. */ - -static INLINE void -mmo_xore_32 (asection *sec, bfd_vma vma, unsigned int value) -{ - bfd_byte *loc = mmo_get_loc (sec, vma, 4); - unsigned int prev = bfd_get_32 (sec->owner, loc); - - value ^= prev; - bfd_put_32 (sec->owner, value, loc); -} - -/* Xor in a 16-bit value VALUE at VMA. */ - -static INLINE void -mmo_xore_16 (asection *sec, bfd_vma vma, unsigned int value) -{ - bfd_byte *loc = mmo_get_loc (sec, vma, 2); - unsigned int prev = bfd_get_16 (sec->owner, loc); - - value ^= prev; - bfd_put_16 (sec->owner, value, loc); -} - -/* Write a 32-bit word to output file, no lop_quote generated. */ - -static INLINE void -mmo_write_tetra_raw (bfd *abfd, unsigned int value) -{ - bfd_byte buf[4]; - - bfd_put_32 (abfd, value, buf); - - if (bfd_bwrite (buf, 4, abfd) != 4) - abfd->tdata.mmo_data->have_error = TRUE; -} - -/* Write a 32-bit word to output file; lop_quote if necessary. */ - -static INLINE void -mmo_write_tetra (bfd *abfd, unsigned int value) -{ - if (((value >> 24) & 0xff) == LOP) - mmo_write_tetra_raw (abfd, LOP_QUOTE_NEXT); - - mmo_write_tetra_raw (abfd, value); -} - -/* Write a 64-bit word to output file, perhaps with lop_quoting. */ - -static INLINE void -mmo_write_octa (bfd *abfd, bfd_vma value) -{ - mmo_write_tetra (abfd, (unsigned int) (value >> 32)); - mmo_write_tetra (abfd, (unsigned int) value); -} - -/* Write a 64-bit word to output file, without lop_quoting. */ - -static INLINE void -mmo_write_octa_raw (bfd *abfd, bfd_vma value) -{ - mmo_write_tetra_raw (abfd, (unsigned int) (value >> 32)); - mmo_write_tetra_raw (abfd, (unsigned int) value); -} - -/* Write quoted contents. Intended to be called multiple times in - sequence, followed by a call to mmo_flush_chunk. */ - -static INLINE bfd_boolean -mmo_write_chunk (bfd *abfd, const bfd_byte *loc, unsigned int len) -{ - bfd_boolean retval = TRUE; - struct mmo_data_struct *mmop = abfd->tdata.mmo_data; - - /* Fill up a tetra from bytes remaining from a previous chunk. */ - if (mmop->byte_no != 0) - { - while (mmop->byte_no < 4 && len != 0) - { - mmop->buf[mmop->byte_no++] = *loc++; - len--; - } - - if (mmop->byte_no == 4) - { - mmo_write_tetra (abfd, bfd_get_32 (abfd, mmop->buf)); - mmop->byte_no = 0; - } - } - - while (len >= 4) - { - if (loc[0] == LOP) - mmo_write_tetra_raw (abfd, LOP_QUOTE_NEXT); - - retval = (retval - && ! mmop->have_error - && 4 == bfd_bwrite (loc, 4, abfd)); - - loc += 4; - len -= 4; - } - - if (len) - { - memcpy (mmop->buf, loc, len); - mmop->byte_no = len; - } - - if (! retval) - mmop->have_error = TRUE; - return retval; -} - -/* Flush remaining bytes, from a previous mmo_write_chunk, zero-padded to - 4 bytes. */ - -static INLINE bfd_boolean -mmo_flush_chunk (bfd *abfd) -{ - if (abfd->tdata.mmo_data->byte_no != 0) - { - memset (abfd->tdata.mmo_data->buf + abfd->tdata.mmo_data->byte_no, - 0, 4 - abfd->tdata.mmo_data->byte_no); - mmo_write_tetra (abfd, - bfd_get_32 (abfd, abfd->tdata.mmo_data->buf)); - abfd->tdata.mmo_data->byte_no = 0; - } - - return ! abfd->tdata.mmo_data->have_error; -} - -/* Same, but from a list. */ - -static INLINE bfd_boolean -mmo_write_chunk_list (bfd *abfd, mmo_data_list_type *datap) -{ - for (; datap != NULL; datap = datap->next) - if (! mmo_write_chunk (abfd, datap->data, datap->size)) - return FALSE; - - return mmo_flush_chunk (abfd); -} - -/* Write a lop_loc and some contents. A caller needs to call - mmo_flush_chunk after calling this function. The location is only - output if different than *LAST_VMAP, which is updated after this call. */ - -static bfd_boolean -mmo_write_loc_chunk (bfd *abfd, bfd_vma vma, const bfd_byte *loc, - unsigned int len, bfd_vma *last_vmap) -{ - /* Find an initial and trailing section of zero tetras; we don't need to - write out zeros. FIXME: When we do this, we should emit section size - and address specifiers, else objcopy can't always perform an identity - translation. Only do this if we *don't* have left-over data from a - previous write or the vma of this chunk is *not* the next address, - because then data isn't tetrabyte-aligned and we're concatenating to - that left-over data. */ - - if (abfd->tdata.mmo_data->byte_no == 0 || vma != *last_vmap) - { - while (len >= 4 && bfd_get_32 (abfd, loc) == 0) - { - vma += 4; - len -= 4; - loc += 4; - } - - while (len >= 4 && bfd_get_32 (abfd, loc + len - 4) == 0) - len -= 4; - } - - /* Only write out the location if it's different than the one the caller - (supposedly) previously handled, accounting for omitted leading zeros. */ - if (vma != *last_vmap) - { - /* We might be in the middle of a sequence. */ - mmo_flush_chunk (abfd); - - /* We always write the location as 64 bits; no use saving bytes - here. */ - mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_LOC << 16) | 2); - mmo_write_octa_raw (abfd, vma); - } - - /* Update to reflect end of this chunk, with trailing zeros omitted. */ - *last_vmap = vma + len; - - return (! abfd->tdata.mmo_data->have_error - && mmo_write_chunk (abfd, loc, len)); -} - -/* Same, but from a list. */ - -static INLINE bfd_boolean -mmo_write_loc_chunk_list (bfd *abfd, mmo_data_list_type *datap) -{ - /* Get an address different than the address of the first chunk. */ - bfd_vma last_vma = datap ? datap->where - 1 : 0; - - for (; datap != NULL; datap = datap->next) - if (! mmo_write_loc_chunk (abfd, datap->where, datap->data, datap->size, - &last_vma)) - return FALSE; - - return mmo_flush_chunk (abfd); -} - -/* Make a .MMIX.spec_data.N section. */ - -static asection * -mmo_get_generic_spec_data_section (bfd *abfd, int spec_data_number) -{ - asection *sec; - char secname[sizeof (MMIX_OTHER_SPEC_SECTION_PREFIX) + 20] - = MMIX_OTHER_SPEC_SECTION_PREFIX; - - sprintf (secname + strlen (MMIX_OTHER_SPEC_SECTION_PREFIX), - "%d", spec_data_number); - - sec = mmo_make_section (abfd, secname); - - return sec; -} - -/* Make a special section for SPEC_DATA_NUMBER. If it is the one we use - ourselves, parse some of its data to get at the section name. */ - -static asection * -mmo_get_spec_section (bfd *abfd, int spec_data_number) -{ - char *secname; - asection *sec; - bfd_byte buf[4]; - unsigned int secname_length; - unsigned int i; - bfd_vma section_length; - bfd_vma section_vma; - mmo_data_list_type *loc; - flagword flags; - long orig_pos; - - /* If this isn't the "special" special data, then make a placeholder - section. */ - if (spec_data_number != SPEC_DATA_SECTION) - return mmo_get_generic_spec_data_section (abfd, spec_data_number); - - /* Seek back to this position if there was a format error. */ - orig_pos = bfd_tell (abfd); - - /* Read the length (in 32-bit words). */ - if (bfd_bread (buf, 4, abfd) != 4) - goto format_error; - - if (buf[0] == LOP) - { - if (buf[1] != LOP_QUOTE) - goto format_error; - - if (bfd_bread (buf, 4, abfd) != 4) - goto format_error; - } - - /* We don't care to keep the name length accurate. It's - zero-terminated. */ - secname_length = bfd_get_32 (abfd, buf) * 4; - - /* Check section name length for sanity. */ - if (secname_length > MAX_SECTION_NAME_SIZE) - goto format_error; - - /* This should be free'd regardless if a section is created. */ - secname = bfd_malloc (secname_length + 1); - secname[secname_length] = 0; - - for (i = 0; i < secname_length / 4; i++) - { - if (bfd_bread (secname + i * 4, 4, abfd) != 4) - goto format_error_free; - - if (secname[i * 4] == (char) LOP) - { - /* A bit of overkill, but we handle char 0x98 in a section name, - and recognize misparsing. */ - if (secname[i * 4 + 1] != LOP_QUOTE - || bfd_bread (secname + i * 4, 4, abfd) != 4) - /* Whoops. We thought this was a name, and now we found a - non-lop_quote lopcode before we parsed the whole length of - the name. Signal end-of-file in the same manner. */ - goto format_error_free; - } - } - - /* Get the section flags. */ - if (bfd_bread (buf, 4, abfd) != 4 - || (buf[0] == LOP - && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) - goto format_error_free; - - flags = bfd_get_32 (abfd, buf); - - /* Get the section length. */ - if (bfd_bread (buf, 4, abfd) != 4 - || (buf[0] == LOP - && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) - goto format_error_free; - - section_length = (bfd_vma) bfd_get_32 (abfd, buf) << 32; - - /* That's the first, high-part. Now get the low part. */ - - if (bfd_bread (buf, 4, abfd) != 4 - || (buf[0] == LOP - && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) - goto format_error_free; - - section_length |= (bfd_vma) bfd_get_32 (abfd, buf); - - /* Check the section length for sanity. */ - if (section_length > MAX_ARTIFICIAL_SECTION_SIZE) - goto format_error_free; - - /* Get the section VMA. */ - if (bfd_bread (buf, 4, abfd) != 4 - || (buf[0] == LOP - && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) - goto format_error_free; - - section_vma = (bfd_vma) bfd_get_32 (abfd, buf) << 32; - - /* That's the first, high-part. Now get the low part. */ - if (bfd_bread (buf, 4, abfd) != 4 - || (buf[0] == LOP - && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) - goto format_error_free; - - section_vma |= (bfd_vma) bfd_get_32 (abfd, buf); - - sec = mmo_make_section (abfd, secname); - free (secname); - if (sec == NULL) - goto format_error; - - /* We allocate a buffer here for the advertised size, with head room for - tetrabyte alignment. */ - loc = bfd_zmalloc (section_length + 3 - + sizeof (struct mmo_data_list_struct)); - if (loc == NULL) - goto format_error; - - /* Use a TETRA-rounded size for the allocated buffer; we set the - "visible" section size below. */ - loc->size = (section_length + 3) & ~3; - - /* Add in the section flags we found to those bfd entered during this - process and set the contents. */ - if (! bfd_set_section_flags (abfd, sec, - bfd_sec_flags_from_mmo_flags (flags) - | bfd_get_section_flags (abfd, sec) - | (section_length != 0 ? SEC_HAS_CONTENTS : 0)) - || ! bfd_set_section_size (abfd, sec, sec->size + section_length) - /* Set VMA only for the first occurrence. */ - || (! sec->user_set_vma - && ! bfd_set_section_vma (abfd, sec, section_vma))) - { - /* If we get an error for any of the calls above, signal more than - just a format error for the spec section. */ - return NULL; - } - - loc->next = NULL; - if (mmo_section_data (sec)->tail != NULL) - mmo_section_data (sec)->tail->next = loc; - else - mmo_section_data (sec)->head = loc; - mmo_section_data (sec)->tail = loc; - loc->where = section_vma; - - return sec; - - format_error_free: - free (secname); - format_error: - if (bfd_seek (abfd, orig_pos, SEEK_SET) != 0) - return NULL; - - return mmo_get_generic_spec_data_section (abfd, spec_data_number); -} - -/* Read a byte, but read from file in multiples of 32-bit words. */ - -static bfd_byte -mmo_get_byte (bfd *abfd) -{ - bfd_byte retval; - - if (abfd->tdata.mmo_data->byte_no == 0) - { - if (! abfd->tdata.mmo_data->have_error - && bfd_bread (abfd->tdata.mmo_data->buf, 4, abfd) != 4) - { - abfd->tdata.mmo_data->have_error = TRUE; - - /* A value somewhat safe against tripping on some inconsistency - when mopping up after this error. */ - return 128; - } - } - - retval = abfd->tdata.mmo_data->buf[abfd->tdata.mmo_data->byte_no]; - abfd->tdata.mmo_data->byte_no = (abfd->tdata.mmo_data->byte_no + 1) % 4; - - return retval; -} - -/* Write a byte, in multiples of 32-bit words. */ - -static void -mmo_write_byte (bfd *abfd, bfd_byte value) -{ - abfd->tdata.mmo_data->buf[(abfd->tdata.mmo_data->byte_no++ % 4)] = value; - if ((abfd->tdata.mmo_data->byte_no % 4) == 0) - { - if (! abfd->tdata.mmo_data->have_error - && bfd_bwrite (abfd->tdata.mmo_data->buf, 4, abfd) != 4) - abfd->tdata.mmo_data->have_error = TRUE; - } -} - -/* Create a symbol. */ - -static bfd_boolean -mmo_create_symbol (bfd *abfd, const char *symname, bfd_vma addr, enum - mmo_sym_type sym_type, unsigned int serno) -{ - struct mmo_symbol *n; - - n = (struct mmo_symbol *) bfd_alloc (abfd, sizeof (struct mmo_symbol)); - if (n == NULL) - return FALSE; - - n->name = bfd_alloc (abfd, strlen (symname) + 1); - if (n->name == NULL) - return FALSE; - - strcpy (n->name, symname); - - n->value = addr; - n->sym_type = sym_type; - n->serno = serno; - - if (abfd->tdata.mmo_data->symbols == NULL) - abfd->tdata.mmo_data->symbols = n; - else - abfd->tdata.mmo_data->symtail->next = n; - abfd->tdata.mmo_data->symtail = n; - n->next = NULL; - - ++abfd->symcount; - - /* Check that :Main equals the last octa of the .MMIX.reg_contents - section, as it's the one place we're sure to pass when reading a mmo - object. For written objects, we do it while setting the symbol - table. */ - if (strcmp (symname, MMIX_START_SYMBOL_NAME) == 0 - && bfd_get_start_address (abfd) != addr) - { - (*_bfd_error_handler) - (_("%s: invalid mmo file: initialization value for $255 is not `Main'\n"), - bfd_get_filename (abfd)); - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - - return TRUE; -} - -/* Read in symbols. */ - -static bfd_boolean -mmo_get_symbols (bfd *abfd) -{ -/* -INODE -Symbol-table, mmo section mapping, File layout, mmo -SUBSECTION - Symbol table format - - From mmixal.w (or really, the generated mmixal.tex) in - @url{http://www-cs-faculty.stanford.edu/~knuth/programs/mmix.tar.gz}): - ``Symbols are stored and retrieved by means of a @samp{ternary - search trie}, following ideas of Bentley and Sedgewick. (See - ACM--SIAM Symp.@: on Discrete Algorithms @samp{8} (1997), 360--369; - R.@:Sedgewick, @samp{Algorithms in C} (Reading, Mass.@: - Addison--Wesley, 1998), @samp{15.4}.) Each trie node stores a - character, and there are branches to subtries for the cases where - a given character is less than, equal to, or greater than the - character in the trie. There also is a pointer to a symbol table - entry if a symbol ends at the current node.'' - - So it's a tree encoded as a stream of bytes. The stream of bytes - acts on a single virtual global symbol, adding and removing - characters and signalling complete symbol points. Here, we read - the stream and create symbols at the completion points. - - First, there's a control byte <<m>>. If any of the listed bits - in <<m>> is nonzero, we execute what stands at the right, in - the listed order: - -| (MMO3_LEFT) -| 0x40 - Traverse left trie. -| (Read a new command byte and recurse.) -| -| (MMO3_SYMBITS) -| 0x2f - Read the next byte as a character and store it in the -| current character position; increment character position. -| Test the bits of <<m>>: -| -| (MMO3_WCHAR) -| 0x80 - The character is 16-bit (so read another byte, -| merge into current character. -| -| (MMO3_TYPEBITS) -| 0xf - We have a complete symbol; parse the type, value -| and serial number and do what should be done -| with a symbol. The type and length information -| is in j = (m & 0xf). -| -| (MMO3_REGQUAL_BITS) -| j == 0xf: A register variable. The following -| byte tells which register. -| j <= 8: An absolute symbol. Read j bytes as the -| big-endian number the symbol equals. -| A j = 2 with two zero bytes denotes an -| unknown symbol. -| j > 8: As with j <= 8, but add (0x20 << 56) -| to the value in the following j - 8 -| bytes. -| -| Then comes the serial number, as a variant of -| uleb128, but better named ubeb128: -| Read bytes and shift the previous value left 7 -| (multiply by 128). Add in the new byte, repeat -| until a byte has bit 7 set. The serial number -| is the computed value minus 128. -| -| (MMO3_MIDDLE) -| 0x20 - Traverse middle trie. (Read a new command byte -| and recurse.) Decrement character position. -| -| (MMO3_RIGHT) -| 0x10 - Traverse right trie. (Read a new command byte and -| recurse.) - - Let's look again at the <<lop_stab>> for the trivial file - (@pxref{File layout}). - -| 0x980b0000 - lop_stab for ":Main" = 0, serial 1. -| 0x203a4040 -| 0x10404020 -| 0x4d206120 -| 0x69016e00 -| 0x81000000 - - This forms the trivial trie (note that the path between ``:'' and - ``M'' is redundant): - -| 203a ":" -| 40 / -| 40 / -| 10 \ -| 40 / -| 40 / -| 204d "M" -| 2061 "a" -| 2069 "i" -| 016e "n" is the last character in a full symbol, and -| with a value represented in one byte. -| 00 The value is 0. -| 81 The serial number is 1. */ - - bfd_byte m = mmo_get_byte (abfd); - - /* Check first if we have a bad hair day. */ - if (abfd->tdata.mmo_data->have_error) - return FALSE; - - if (m & MMO3_LEFT) - /* Traverse left trie. */ - mmo_get_symbols (abfd); - - if (m & MMO3_SYMBITS) - { - bfd_byte c = mmo_get_byte (abfd); - bfd_byte j = m & MMO3_TYPEBITS; - bfd_vma addr = 0; - enum mmo_sym_type sym_type; - unsigned int serno = 0; - bfd_byte k; - - if (m & MMO3_WCHAR) - { - bfd_byte c2 = mmo_get_byte (abfd); - - /* A two-byte character. We can't grok this, but neither can - mmotype, for other cases than the second byte being zero. */ - - if (c != 0) - { - abfd->tdata.mmo_data->lop_stab_symbol - [abfd->tdata.mmo_data->symbol_position] = 0; - - (*_bfd_error_handler) - (_("%s: unsupported wide character sequence" - " 0x%02X 0x%02X after symbol name starting with `%s'\n"), - bfd_get_filename (abfd), c, c2, - abfd->tdata.mmo_data->lop_stab_symbol); - bfd_set_error (bfd_error_bad_value); - abfd->tdata.mmo_data->have_error = TRUE; - return FALSE; - } - else - c = c2; - } - - abfd->tdata.mmo_data->lop_stab_symbol[abfd->tdata.mmo_data->symbol_position++] = c; - abfd->tdata.mmo_data->lop_stab_symbol[abfd->tdata.mmo_data->symbol_position] = 0; - - if (j & MMO3_REGQUAL_BITS) - { - if (j == MMO3_REGQUAL_BITS) - { - sym_type = mmo_reg_sym; - addr = mmo_get_byte (abfd); - } - else if (j <= 8) - { - unsigned int i; - - for (i = 0; i < j; i++) - addr = (addr << 8) + mmo_get_byte (abfd); - - if (addr == 0 && j == MMO3_UNDEF) - sym_type = mmo_undef_sym; - else - sym_type = mmo_abs_sym; - } - else - { - unsigned int i; - - for (i = MMO3_DATA; i < j; i++) - addr = (addr << 8) + mmo_get_byte (abfd); - - addr += (bfd_vma) 0x20 << 56; - sym_type = mmo_data_sym; - } - - /* Get the serial number. */ - do - { - k = mmo_get_byte (abfd); - serno = (serno << 7) + k; - } - while (k < 128); - serno -= 128; - - /* Got it. Now enter it. Skip a leading ":". */ - if (! abfd->tdata.mmo_data->have_error - && ! mmo_create_symbol (abfd, - abfd->tdata.mmo_data->lop_stab_symbol - + 1, - addr, sym_type, serno)) - abfd->tdata.mmo_data->have_error = TRUE; - } - - if (m & MMO3_MIDDLE) - /* Traverse middle trie. */ - mmo_get_symbols (abfd); - - abfd->tdata.mmo_data->symbol_position--; - } - - if (m & MMO3_RIGHT) - /* Traverse right trie. */ - mmo_get_symbols (abfd); - - return ! abfd->tdata.mmo_data->have_error; -} - -/* Get the location of memory area [VMA..VMA + SIZE - 1], which we think - is in section SEC. Adjust and reallocate zero-initialized contents. - If there's new contents, allocate to the next multiple of - MMO_SEC_CONTENTS_CHUNK_SIZE. */ - -static INLINE bfd_byte * -mmo_get_loc (asection *sec, bfd_vma vma, int size) -{ - bfd_size_type allocated_size; - struct mmo_section_data_struct *sdatap = mmo_section_data (sec); - struct mmo_data_list_struct *datap = sdatap->head; - struct mmo_data_list_struct *entry; - - /* First search the list to see if we have the requested chunk in one - piece, or perhaps if we have a suitable chunk with room to fit. */ - for (; datap != NULL; datap = datap->next) - { - if (datap->where <= vma - && datap->where + datap->size >= vma + size) - return datap->data + vma - datap->where; - else if (datap->where <= vma - && datap->where + datap->allocated_size >= vma + size - /* Only munch on the "allocated size" if it does not - overlap the next chunk. */ - && (datap->next == NULL || datap->next->where >= vma + size)) - { - /* There was room allocated, but the size wasn't set to include - it. Do that now. */ - datap->size += (vma + size) - (datap->where + datap->size); - - /* Update the section size. This happens only if we update the - 32-bit-aligned chunk size. Callers that have - non-32-bit-aligned sections should do all allocation and - size-setting by themselves or at least set the section size - after the last allocating call to this function. */ - if (vma + size > sec->vma + sec->size) - sec->size += (vma + size) - (sec->vma + sec->size); - - return datap->data + vma - datap->where; - } - } - - /* Not found; allocate a new block. First check in case we get a - request for a size split up over several blocks; we'll have to return - NULL for those cases, requesting the caller to split up the request. - Requests with an address aligned on MMO_SEC_CONTENTS_CHUNK_SIZE bytes and - for no more than MMO_SEC_CONTENTS_CHUNK_SIZE will always get resolved. */ - - for (datap = sdatap->head; datap != NULL; datap = datap->next) - if ((datap->where <= vma && datap->where + datap->size > vma) - || (datap->where < vma + size - && datap->where + datap->size >= vma + size)) - return NULL; - - allocated_size - = (size + MMO_SEC_CONTENTS_CHUNK_SIZE - 1) & ~(MMO_SEC_CONTENTS_CHUNK_SIZE - 1); - entry = (mmo_data_list_type *) - bfd_zalloc (sec->owner, sizeof (mmo_data_list_type) + allocated_size); - if (entry == NULL) - return NULL; - entry->where = vma; - entry->size = size; - entry->allocated_size = allocated_size; - - datap = sdatap->head; - - /* Sort the records by address. Optimize for the common case of adding - a record to the end of the list. */ - if (sdatap->tail != NULL && entry->where >= sdatap->tail->where) - { - sdatap->tail->next = entry; - entry->next = NULL; - sdatap->tail = entry; - } - else - { - mmo_data_list_type **look; - for (look = &sdatap->head; - *look != NULL && (*look)->where < entry->where; - look = &(*look)->next) - ; - entry->next = *look; - *look = entry; - if (entry->next == NULL) - { - sdatap->tail = entry; - - /* We get here for the first time (at other times too) for this - section. Say we have contents. */ - if (! bfd_set_section_flags (sec->owner, sec, - bfd_get_section_flags (sec->owner, sec) - | SEC_HAS_CONTENTS)) - return NULL; - } - } - - /* Update the section size. This happens only when we add contents and - re-size as we go. The section size will then be aligned to 32 bits. */ - if (vma + size > sec->vma + sec->size) - sec->size += (vma + size) - (sec->vma + sec->size); - return entry->data; -} - -/* Set sizes once we've read in all sections. */ - -static void -mmo_map_set_sizes (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, - void *ignored ATTRIBUTE_UNUSED) -{ - sec->lma = sec->vma; -} - -/* Read the mmo file and turn it into sections. */ - -static bfd_boolean -mmo_scan (bfd *abfd) -{ - unsigned int i; - unsigned int lineno = 1; - bfd_boolean error = FALSE; - bfd_vma vma = 0; - asection *sec = bfd_make_section_old_way (abfd, MMO_TEXT_SECTION_NAME); - asection *non_spec_sec = NULL; - bfd_vma non_spec_vma = 0; - bfd_size_type nbytes_read = 0; - /* Buffer with room to read a 64-bit value. */ - bfd_byte buf[8]; - long stab_loc = -1; - char *file_names[256]; - - abfd->symcount = 0; - memset (file_names, 0, sizeof (file_names)); - - if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) - goto error_return; - - while ((nbytes_read = bfd_bread (buf, 4, abfd)) == 4) - { - if (buf[0] == LOP) - { - unsigned int y = bfd_get_8 (abfd, buf + 2); - unsigned int z = bfd_get_8 (abfd, buf + 3); - - /* Change back to the original section for lopcodes other - than LOP_QUOTE that comes after a LOP_SPEC. */ - if ((buf[1] != LOP_QUOTE || y != 0 || z != 1) - && non_spec_sec != NULL) - { - sec = non_spec_sec; - vma = non_spec_vma; - non_spec_sec = NULL; - } - - switch (buf[1]) - { - default: - (*_bfd_error_handler) - (_("%s: invalid mmo file: unsupported lopcode `%d'\n"), - bfd_get_filename (abfd), buf[1]); - bfd_set_error (bfd_error_bad_value); - goto error_return; - - case LOP_QUOTE: - /* Quote the next 32-bit word. */ - if (y != 0 || z != 1) - { - (*_bfd_error_handler) - (_("%s: invalid mmo file: expected YZ = 1 got YZ = %d for lop_quote\n"), - bfd_get_filename (abfd), y*256+z); - bfd_set_error (bfd_error_bad_value); - goto error_return; - } - if (bfd_bread (buf, 4, abfd) != 4) - goto error_return; - - mmo_xore_32 (sec, vma, bfd_get_32 (abfd, buf)); - vma += 4; - vma &= ~3; - lineno++; - break; - - case LOP_LOC: - /* Set vma (and section). */ - vma = (bfd_vma) y << 56; - if (z == 1) - { - /* Get a 32-bit value. */ - if (bfd_bread (buf, 4, abfd) != 4) - goto error_return; - - vma += bfd_get_32 (abfd, buf); - } - else if (z == 2) - { - /* Get a 64-bit value. */ - if (bfd_bread (buf, 8, abfd) != 8) - goto error_return; - - vma += bfd_get_64 (abfd, buf); - } - else - { - (*_bfd_error_handler) - (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_loc\n"), - bfd_get_filename (abfd), z); - bfd_set_error (bfd_error_bad_value); - goto error_return; - } - - sec = mmo_decide_section (abfd, vma); - if (sec == NULL) - goto error_return; - break; - - case LOP_SKIP: - /* Move forward within the same section. */ - vma += y * 256 + z; - - sec = mmo_decide_section (abfd, vma); - if (sec == NULL) - goto error_return; - break; - - case LOP_FIXO: - /* A fixup: Store the current vma somewhere. Position using - same format as LOP_LOC. */ - { - bfd_vma p = (bfd_vma) y << 56; - asection *fixosec; - - if (z == 1) - { - /* Get a 32-bit value. */ - if (bfd_bread (buf, 4, abfd) != 4) - goto error_return; - - p += bfd_get_32 (abfd, buf); - } - else if (z == 2) - { - /* Get a 64-bit value. */ - if (bfd_bread (buf, 8, abfd) != 8) - goto error_return; - - p += bfd_get_64 (abfd, buf); - } - else - { - (*_bfd_error_handler) - (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_fixo\n"), - bfd_get_filename (abfd), z); - bfd_set_error (bfd_error_bad_value); - goto error_return; - } - - /* The section where we store this address might be a - different one than the current section. */ - fixosec = mmo_decide_section (abfd, p); - if (fixosec == NULL) - goto error_return; - mmo_xore_64 (fixosec, p, vma); - } - break; - - case LOP_FIXR: - /* A fixup: Store YZ of this lopcode into YZ at vma - 4 * yz. */ - { - unsigned int yz = (y * 256 + z); - bfd_vma p = vma + 2 - 4 * yz; - asection *fixrsec = mmo_decide_section (abfd, p); - if (fixrsec == NULL) - goto error_return; - mmo_xore_16 (fixrsec, p, yz); - } - break; - - case LOP_FIXRX: - /* A fixup, similar to lop_fixr, but taking larger numbers - and can change branches into the opposite direction - (gasp!). */ - { - bfd_vma delta; - bfd_vma p; - asection *fixrsec; - - if (y != 0) - { - (*_bfd_error_handler) - (_("%s: invalid mmo file: expected y = 0, got y = %d for lop_fixrx\n"), - bfd_get_filename (abfd), y); - bfd_set_error (bfd_error_bad_value); - goto error_return; - } - - if (z != 16 && z != 24) - { - (*_bfd_error_handler) - (_("%s: invalid mmo file: expected z = 16 or z = 24, got z = %d for lop_fixrx\n"), - bfd_get_filename (abfd), z); - bfd_set_error (bfd_error_bad_value); - goto error_return; - } - - /* Get the next 32-bit value. */ - if (bfd_bread (buf, 4, abfd) != 4) - goto error_return; - - delta = bfd_get_32 (abfd, buf); - - /* Do an, ehm, involved calculation for the location of - the fixup. See mmixal documentation for a verbose - explanation. We follow it verbosely here for the - readers delight. */ - if (buf[0] == 0) - p = vma - 4 * delta; - else if (buf[0] == 1) - p = vma - 4 * ((delta & 0xffffff) - (1 << z)); - else - { - (*_bfd_error_handler) - (_("%s: invalid mmo file: leading byte of operand word must be 0 or 1, got %d for lop_fixrx\n"), - bfd_get_filename (abfd), buf[0]); - bfd_set_error (bfd_error_bad_value); - goto error_return; - } - - fixrsec = mmo_decide_section (abfd, vma); - if (fixrsec == NULL) - goto error_return; - mmo_xore_32 (fixrsec, p, delta); - } - break; - - case LOP_FILE: - /* Set current file and perhaps the file name. Reset line - number. */ - if (z != 0) - { - char *fname = bfd_malloc (z * 4 + 1); - - if (fname == NULL) - { - (*_bfd_error_handler) - (_("%s: cannot allocate file name for file number %d, %d bytes\n"), - bfd_get_filename (abfd), y, z * 4 + 1); - bfd_set_error (bfd_error_system_call); - goto error_return; - } - - fname[z * 4] = 0; - - for (i = 0; i < z; i++) - { - if (bfd_bread (fname + i * 4, 4, abfd) != 4) - { - free (fname); - goto error_return; - } - } - - if (file_names[y] != NULL) - { - (*_bfd_error_handler) - (_("%s: invalid mmo file: file number %d `%s'," - " was already entered as `%s'\n"), - bfd_get_filename (abfd), y, fname, file_names[y]); - bfd_set_error (bfd_error_bad_value); - goto error_return; - } - - file_names[y] = fname; - } - - if (file_names[y] == NULL) - { - (*_bfd_error_handler) - (_("%s: invalid mmo file: file name for number %d" - " was not specified before use\n"), - bfd_get_filename (abfd), y); - bfd_set_error (bfd_error_bad_value); - goto error_return; - } - - lineno = 0; - break; - - case LOP_LINE: - /* Set line number. */ - lineno = y * 256 + z; - /* FIXME: Create a sequence of mmo-specific line number - entries for each section, then translate into canonical - format. */ - break; - - case LOP_SPEC: - /* Special data follows until the next non-lop_quote - lopcode. */ - non_spec_sec = sec; - non_spec_vma = vma; - sec = mmo_get_spec_section (abfd, y * 256 + z); - if (sec == NULL) - goto error_return; - - vma = sec->vma; - break; - - case LOP_PRE: - { - /* We ignore header information, except we read in the - creation time from the first 32-bit word with the time - in seconds since era. */ - if (z >= 1 - && bfd_bread (abfd->tdata.mmo_data->created, 4, - abfd) != 4) - goto error_return; - - for (i = 1; i < z; i++) - if (bfd_bread (buf, 4, abfd) != 4) - goto error_return; - } - break; - - case LOP_POST: - /* This tells of the contents of registers $Z..$255 at - startup. We make a section out of it, with VMA = Z * 8, - but only if Z != 255 or the contents is non-zero. */ - { - asection *rsec; - bfd_byte *loc; - bfd_vma first_octa; - bfd_vma startaddr_octa; - - /* Read first octaword outside loop to simplify logic when - excluding the Z == 255, octa == 0 case. */ - if (bfd_bread (buf, 8, abfd) != 8) - goto error_return; - - first_octa = bfd_get_64 (abfd, buf); - - /* Don't emit contents for the trivial case which is - always present; $255 pointing to Main. */ - if (z != 255) - { - rsec - = bfd_make_section_old_way (abfd, - MMIX_REG_CONTENTS_SECTION_NAME); - rsec->flags |= SEC_LINKER_CREATED; - rsec->vma = z * 8; - loc = mmo_get_loc (rsec, z * 8, (255 - z) * 8); - bfd_put_64 (abfd, first_octa, loc); - - for (i = z + 1; i < 255; i++) - { - if (bfd_bread (loc + (i - z) * 8, 8, abfd) != 8) - goto error_return; - } - - /* Read out the last octabyte, and use it to set the - start address. */ - if (bfd_bread (buf, 8, abfd) != 8) - goto error_return; - - startaddr_octa = bfd_get_64 (abfd, buf); - } - else - startaddr_octa = first_octa; - - if (! bfd_set_start_address (abfd, startaddr_octa)) - { - /* Currently this can't fail, but this should handle - future failures. */ - bfd_set_error (bfd_error_bad_value); - goto error_return; - } - } - break; - - case LOP_STAB: - /* We read in the symbols now, not later. */ - if (y != 0 || z != 0) - { - (*_bfd_error_handler) - (_("%s: invalid mmo file: fields y and z of lop_stab" - " non-zero, y: %d, z: %d\n"), - bfd_get_filename (abfd), y, z); - bfd_set_error (bfd_error_bad_value); - goto error_return; - } - - /* Save the location, so we can check that YZ in the LOP_END - is correct. */ - stab_loc = bfd_tell (abfd); - - /* It's not said that an MMO can be without symbols (though - mmixal will refuse to assemble files without Main), but - it seems it would still be a valid mmo-file, so allow it. - We detect the absence of a symbol area in that the upper - limit is computed (from the lop_end YZ field) as 0. - Don't call mmo_get_symbols; it can only detect the end of - a valid symbol trie, not the absence of one. */ - if (abfd->tdata.mmo_data->max_symbol_length != 0 - && ! mmo_get_symbols (abfd)) - goto error_return; - break; - - case LOP_END: - { - /* This must be the last 32-bit word in an mmo file. - Let's find out. */ - struct stat statbuf; - file_ptr curpos = bfd_tell (abfd); - - if (bfd_stat (abfd, &statbuf) < 0) - goto error_return; - - if (statbuf.st_size != curpos) - { - (*_bfd_error_handler) - (_("%s: invalid mmo file: lop_end not last item in" - " file\n"), - bfd_get_filename (abfd)); - bfd_set_error (bfd_error_bad_value); - goto error_return; - } - - /* Check that the YZ field is right. Subtract the size of - this LOP_END in the calculation; YZ does not include - it. */ - if ((long) (y * 256 + z) * 4 != (curpos - stab_loc) - 4) - { - (*_bfd_error_handler) - (_("%s: invalid mmo file: YZ of lop_end (%ld)" - " not equal to the number of tetras to the preceding" - " lop_stab (%ld)\n"), - bfd_get_filename (abfd), (long) (y * 256 + z), - (curpos - stab_loc - 4)/4); - bfd_set_error (bfd_error_bad_value); - goto error_return; - } - - bfd_map_over_sections (abfd, mmo_map_set_sizes, NULL); - goto done; - } - } - } - else - { - /* This wasn't a lopcode, so store it in the current section. */ - mmo_xore_32 (sec, vma & ~3, bfd_get_32 (abfd, buf)); - vma += 4; - vma &= ~3; - lineno++; - } - } - - /* We know this file is a multiple of four bytes (checked in - mmo_object_p), so if we got something other than 0, this was a bad - file (although it's more likely we'll get 0 in that case too). - If we got end-of-file, then there was no lop_stab, so the file has - invalid format. */ - - if (nbytes_read != 0) - bfd_set_error (bfd_error_system_call); - else - bfd_set_error (bfd_error_bad_value); - - error_return: - error = TRUE; - done: - /* Mark the .text and .data section with their normal attribute if they - contain anything. This is not redundant wrt. mmo_decide_section, - since that code might never execute, and conversely the alloc+code - section flags must be set then. */ - sec = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME); - if (sec != NULL - && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) - && ! bfd_set_section_flags (abfd, sec, - bfd_get_section_flags (abfd, sec) - | SEC_ALLOC | SEC_LOAD | SEC_CODE)) - error = TRUE; - - sec = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME); - if (sec != NULL - && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) - && ! bfd_set_section_flags (abfd, sec, - bfd_get_section_flags (abfd, sec) - | SEC_ALLOC | SEC_LOAD)) - error = TRUE; - - /* Free whatever resources we took. */ - for (i = 0; i < sizeof (file_names) / sizeof (file_names[0]); i++) - if (file_names[i]) - free (file_names[i]); - return ! error; -} - -/* A hook to set up object file dependent section information. For mmo, - we point out the shape of allocated section contents. */ - -static bfd_boolean -mmo_new_section_hook (bfd *abfd, asection *newsect) -{ - if (!newsect->used_by_bfd) - { - /* We zero-fill all fields and assume NULL is represented by an all - zero-bit pattern. */ - newsect->used_by_bfd - = bfd_zalloc (abfd, sizeof (struct mmo_section_data_struct)); - if (!newsect->used_by_bfd) - return FALSE; - } - - /* Always align to at least 32-bit words. */ - newsect->alignment_power = 2; - return _bfd_generic_new_section_hook (abfd, newsect); -} - -/* We already have section contents loaded for sections that have - contents. */ - -static bfd_boolean -mmo_get_section_contents (bfd *abfd ATTRIBUTE_UNUSED, - asection *sec, - void * location, - file_ptr offset, - bfd_size_type bytes_to_do) -{ - /* Iterate over diminishing chunk sizes, copying contents, like - mmo_set_section_contents. */ - while (bytes_to_do) - { - /* A minor song-and-dance to make sure we're not bitten by the - distant possibility of the cast from bfd_vma to int making the - chunk zero-sized. */ - int chunk_size - = (int) bytes_to_do != 0 ? bytes_to_do : MMO_SEC_CONTENTS_CHUNK_SIZE; - bfd_byte *loc; - - do - loc = mmo_get_loc (sec, sec->vma + offset, chunk_size); - while (loc == NULL && (chunk_size /= 2) != 0); - - if (chunk_size == 0) - return FALSE; - - memcpy (location, loc, chunk_size); - - location += chunk_size; - bytes_to_do -= chunk_size; - offset += chunk_size; - } - return TRUE; -} - -/* Return the amount of memory needed to read the symbol table. */ - -static long -mmo_get_symtab_upper_bound (bfd *abfd) -{ - return (abfd->symcount + 1) * sizeof (asymbol *); -} - -/* Sort mmo symbols by serial number. */ - -static int -mmo_sort_mmo_symbols (const void *arg1, const void *arg2) -{ - const struct mmo_symbol *sym1 = *(const struct mmo_symbol **) arg1; - const struct mmo_symbol *sym2 = *(const struct mmo_symbol **) arg2; - - /* Sort by serial number first. */ - if (sym1->serno < sym2->serno) - return -1; - else if (sym1->serno > sym2->serno) - return 1; - - /* Then sort by address of the table entries. */ - return ((const char *) arg1 - (const char *) arg2); -} - -/* Translate the symbol table. */ - -static long -mmo_canonicalize_symtab (bfd *abfd, asymbol **alocation) -{ - unsigned int symcount = bfd_get_symcount (abfd); - asymbol *csymbols; - unsigned int i; - - csymbols = abfd->tdata.mmo_data->csymbols; - if (csymbols == NULL && symcount != 0) - { - asymbol *c; - struct mmo_symbol *s; - struct mmo_symbol **msp; - - /* First we store the symbols into the table we'll return, then we - qsort it on the serial number, with secondary on the address of - the symbol, to preserve order if there would be non-unique serial - numbers. */ - for (s = abfd->tdata.mmo_data->symbols, - msp = (struct mmo_symbol **) alocation; - s != NULL; - s = s->next, ++msp) - *msp = s; - - *msp = NULL; - - qsort (alocation, symcount, sizeof (struct mmo_symbol *), - mmo_sort_mmo_symbols); - - csymbols = (asymbol *) bfd_alloc (abfd, symcount * sizeof (asymbol)); - if (csymbols == NULL) - return -1; - abfd->tdata.mmo_data->csymbols = csymbols; - - for (msp = (struct mmo_symbol **) alocation, c = csymbols; - *msp != NULL; - msp++, ++c) - { - s = *msp; - c->the_bfd = abfd; - c->name = s->name; - c->value = s->value; - c->flags = BSF_GLOBAL; - - if (s->sym_type == mmo_data_sym) - { - c->section - = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME); - - if (c->section == NULL) - c->section = bfd_abs_section_ptr; - else - c->value -= c->section->vma; - } - else if (s->sym_type == mmo_undef_sym) - c->section = bfd_und_section_ptr; - else if (s->sym_type == mmo_reg_sym) - { - c->section - = bfd_make_section_old_way (abfd, MMIX_REG_SECTION_NAME); - c->section->flags |= SEC_LINKER_CREATED; - } - else - { - asection *textsec - = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME); - asection *datasec; - - if (textsec != NULL - && c->value >= textsec->vma - && c->value <= textsec->vma + textsec->size) - { - c->section = textsec; - c->value -= c->section->vma; - } - /* In mmo, symbol types depend on the VMA. Therefore, if - the data section isn't within the usual bounds, its - symbols are marked as absolute. Correct that. This - means we can't have absolute symbols with values matching - data section addresses, but we also can't have with - absolute symbols with values matching text section - addresses. For such needs, use the ELF format. */ - else if ((datasec - = bfd_get_section_by_name (abfd, - MMO_DATA_SECTION_NAME)) - != NULL - && c->value >= datasec->vma - && c->value <= datasec->vma + datasec->size) - { - c->section = datasec; - c->value -= c->section->vma; - } - else - c->section = bfd_abs_section_ptr; - } - - c->udata.p = NULL; - } - } - - /* Last, overwrite the incoming table with the right-type entries. */ - for (i = 0; i < symcount; i++) - *alocation++ = csymbols++; - *alocation = NULL; - - return symcount; -} - -/* Get information about a symbol. */ - -static void -mmo_get_symbol_info (bfd *ignore_abfd ATTRIBUTE_UNUSED, - asymbol *symbol, symbol_info *ret) -{ - bfd_symbol_info (symbol, ret); -} - -static void -mmo_print_symbol (bfd *abfd, void *afile, asymbol *symbol, - bfd_print_symbol_type how) -{ - FILE *file = (FILE *) afile; - - switch (how) - { - case bfd_print_symbol_name: - fprintf (file, "%s", symbol->name); - break; - default: - bfd_print_symbol_vandf (abfd, file, symbol); - - fprintf (file, " %-5s %s", - symbol->section->name, - symbol->name); - } -} - -/* We can't map a file directly into executable code, so the - size of header information is irrelevant. */ - -static int -mmo_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED, - struct bfd_link_info *info ATTRIBUTE_UNUSED) -{ - return 0; -} - -/* Write the (section-neutral) file preamble. */ - -static bfd_boolean -mmo_internal_write_header (bfd *abfd) -{ - const char lop_pre_bfd[] = { LOP, LOP_PRE, 1, 1}; - - if (bfd_bwrite (lop_pre_bfd, 4, abfd) != 4) - return FALSE; - - /* Copy creation time of original file. */ - if (bfd_bwrite (abfd->tdata.mmo_data->created, 4, abfd) != 4) - return FALSE; - - return TRUE; -} - -/* Write the LOP_POST record, with global register initializations. - Z is the Z field of the LOP_POST, corresponding to 255 - number of - registers at DATA. The Z = 255 field is filled in with the - start-address. */ - -static bfd_boolean -mmo_internal_write_post (bfd *abfd, int z, asection *sec) -{ - int i; - bfd_byte buf[8]; - mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_POST << 16) | z); - - for (i = z; i < 255; i++) - { - bfd_byte *data = mmo_get_loc (sec, i * 8, 8); - - if (bfd_bwrite (data, 8, abfd) != 8) - return FALSE; - } - - /* For Z == $255, we always emit the start location; supposedly Main, - but we have it handy at bfd_get_start_address. If we're called with - Z == 255, don't assume DATA is valid. */ - bfd_put_64 (abfd, bfd_get_start_address (abfd), buf); - - return ! abfd->tdata.mmo_data->have_error && bfd_bwrite (buf, 8, abfd) == 8; -} - -/* Translate to and from BFD flags. This is to make sure that we don't - get bitten by BFD flag number changes. */ - -static flagword -mmo_sec_flags_from_bfd_flags (flagword flags) -{ - flagword oflags = 0; - - if (flags & SEC_ALLOC) - oflags |= MMO_SEC_ALLOC; - if (flags & SEC_LOAD) - oflags |= MMO_SEC_LOAD; - if (flags & SEC_RELOC) - oflags |= MMO_SEC_RELOC; - if (flags & SEC_READONLY) - oflags |= MMO_SEC_READONLY; - if (flags & SEC_CODE) - oflags |= MMO_SEC_CODE; - if (flags & SEC_DATA) - oflags |= MMO_SEC_DATA; - if (flags & SEC_NEVER_LOAD) - oflags |= MMO_SEC_NEVER_LOAD; - if (flags & SEC_IS_COMMON) - oflags |= MMO_SEC_IS_COMMON; - if (flags & SEC_DEBUGGING) - oflags |= MMO_SEC_DEBUGGING; - - return oflags; -} - -static flagword -bfd_sec_flags_from_mmo_flags (flagword flags) -{ - flagword oflags = 0; - - if (flags & MMO_SEC_ALLOC) - oflags |= SEC_ALLOC; - if (flags & MMO_SEC_LOAD) - oflags |= SEC_LOAD; - if (flags & MMO_SEC_RELOC) - oflags |= SEC_RELOC; - if (flags & MMO_SEC_READONLY) - oflags |= SEC_READONLY; - if (flags & MMO_SEC_CODE) - oflags |= SEC_CODE; - if (flags & MMO_SEC_DATA) - oflags |= SEC_DATA; - if (flags & MMO_SEC_NEVER_LOAD) - oflags |= SEC_NEVER_LOAD; - if (flags & MMO_SEC_IS_COMMON) - oflags |= SEC_IS_COMMON; - if (flags & MMO_SEC_DEBUGGING) - oflags |= SEC_DEBUGGING; - - return oflags; -} - -/* Return TRUE iff the leading or trailing tetrabyte in SEC is defined and - is 0. */ - -static bfd_boolean -mmo_has_leading_or_trailing_zero_tetra_p (bfd *abfd, asection *sec) -{ - bfd_vma secaddr = bfd_get_section_vma (abfd, sec); - - if (sec->size < 4) - return FALSE; - - if (bfd_get_32 (abfd, mmo_get_loc (sec, secaddr, 4)) == 0 - && bfd_get_32 (abfd, - mmo_get_loc (sec, secaddr + sec->size - 4, 4)) == 0) - return TRUE; - - return FALSE; -} - -/* Write a section. */ - -static bfd_boolean -mmo_internal_write_section (bfd *abfd, asection *sec) -{ - /* We do it differently depending on what section this is: - - ".text": Output, prepended by information about the first source file - (not yet implemented.) - - ".data": Output. - - (".MMIX.reg_contents": Not handled here.) - - Anything else: Output inside a lop_spec 80, in the format described - above. */ - - if (strcmp (sec->name, MMO_TEXT_SECTION_NAME) == 0) - { - bfd_vma secaddr = bfd_get_section_vma (abfd, sec); - - /* Because leading and trailing zeros are omitted in output, we need to - specify the section boundaries so they're correct when the file - is read in again. That's also the case if this section is - specified as not within its usual boundaries or alignments. */ - if (sec->size != 0 - && (secaddr + sec->size >= (bfd_vma) 1 << 56 - || (secaddr & 3) != 0 - || (sec->size & 3) != 0 - || mmo_has_leading_or_trailing_zero_tetra_p (abfd, sec))) - { - if (!mmo_write_section_description (abfd, sec)) - return FALSE; - } - - /* FIXME: Output source file name and line number. */ - return mmo_write_loc_chunk_list (abfd, mmo_section_data (sec)->head); - } - else if (strcmp (sec->name, MMO_DATA_SECTION_NAME) == 0) - { - bfd_vma secaddr = bfd_get_section_vma (abfd, sec); - - /* Same goes as for MMO_TEXT_SECTION_NAME above. */ - if (sec->size != 0 - && (secaddr < (bfd_vma) 0x20 << 56 - || secaddr + sec->size >= (bfd_vma) 0x21 << 56 - || (secaddr & 3) != 0 - || (sec->size & 3) != 0 - || mmo_has_leading_or_trailing_zero_tetra_p (abfd, sec))) - { - if (!mmo_write_section_description (abfd, sec)) - return FALSE; - } - - return mmo_write_loc_chunk_list (abfd, mmo_section_data (sec)->head); - } - else if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) - /* Not handled here. */ - { - /* This would normally be an abort call since this can't happen, but - we don't do that. */ - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - else if (CONST_STRNEQ (sec->name, MMIX_OTHER_SPEC_SECTION_PREFIX)) - { - int n = atoi (sec->name + strlen (MMIX_OTHER_SPEC_SECTION_PREFIX)); - - mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_SPEC << 16) | n); - return (! abfd->tdata.mmo_data->have_error - && mmo_write_chunk_list (abfd, mmo_section_data (sec)->head)); - } - /* Ignore sections that are just allocated or empty; we write out - _contents_ here. */ - else if ((bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) != 0 - && sec->size != 0) - { - if (!mmo_write_section_description (abfd, sec)) - return FALSE; - - /* Writing a LOP_LOC ends the LOP_SPEC data, and makes data actually - loaded. */ - if (bfd_get_section_flags (abfd, sec) & SEC_LOAD) - return (! abfd->tdata.mmo_data->have_error - && mmo_write_loc_chunk_list (abfd, - mmo_section_data (sec)->head)); - return (! abfd->tdata.mmo_data->have_error - && mmo_write_chunk_list (abfd, mmo_section_data (sec)->head)); - } - - /* Some section without contents. */ - return TRUE; -} - -/* Write the description of a section, extended-mmo-style. */ - -static bfd_boolean -mmo_write_section_description (bfd *abfd, asection *sec) -{ - /* Keep the following document-comment formatted the way it is. */ -/* -INODE -mmo section mapping, , Symbol-table, mmo -SUBSECTION - mmo section mapping - - The implementation in BFD uses special data type 80 (decimal) to - encapsulate and describe named sections, containing e.g.@: debug - information. If needed, any datum in the encapsulation will be - quoted using lop_quote. First comes a 32-bit word holding the - number of 32-bit words containing the zero-terminated zero-padded - segment name. After the name there's a 32-bit word holding flags - describing the section type. Then comes a 64-bit big-endian word - with the section length (in bytes), then another with the section - start address. Depending on the type of section, the contents - might follow, zero-padded to 32-bit boundary. For a loadable - section (such as data or code), the contents might follow at some - later point, not necessarily immediately, as a lop_loc with the - same start address as in the section description, followed by the - contents. This in effect forms a descriptor that must be emitted - before the actual contents. Sections described this way must not - overlap. - - For areas that don't have such descriptors, synthetic sections are - formed by BFD. Consecutive contents in the two memory areas - @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} and - @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} are entered in - sections named <<.text>> and <<.data>> respectively. If an area - is not otherwise described, but would together with a neighboring - lower area be less than @samp{0x40000000} bytes long, it is joined - with the lower area and the gap is zero-filled. For other cases, - a new section is formed, named <<.MMIX.sec.@var{n}>>. Here, - @var{n} is a number, a running count through the mmo file, - starting at 0. - -EXAMPLE - A loadable section specified as: - -| .section secname,"ax" -| TETRA 1,2,3,4,-1,-2009 -| BYTE 80 - - and linked to address @samp{0x4}, is represented by the sequence: - -| 0x98080050 - lop_spec 80 -| 0x00000002 - two 32-bit words for the section name -| 0x7365636e - "secn" -| 0x616d6500 - "ame\0" -| 0x00000033 - flags CODE, READONLY, LOAD, ALLOC -| 0x00000000 - high 32 bits of section length -| 0x0000001c - section length is 28 bytes; 6 * 4 + 1 + alignment to 32 bits -| 0x00000000 - high 32 bits of section address -| 0x00000004 - section address is 4 -| 0x98010002 - 64 bits with address of following data -| 0x00000000 - high 32 bits of address -| 0x00000004 - low 32 bits: data starts at address 4 -| 0x00000001 - 1 -| 0x00000002 - 2 -| 0x00000003 - 3 -| 0x00000004 - 4 -| 0xffffffff - -1 -| 0xfffff827 - -2009 -| 0x50000000 - 80 as a byte, padded with zeros. - - Note that the lop_spec wrapping does not include the section - contents. Compare this to a non-loaded section specified as: - -| .section thirdsec -| TETRA 200001,100002 -| BYTE 38,40 - - This, when linked to address @samp{0x200000000000001c}, is - represented by: - -| 0x98080050 - lop_spec 80 -| 0x00000002 - two 32-bit words for the section name -| 0x7365636e - "thir" -| 0x616d6500 - "dsec" -| 0x00000010 - flag READONLY -| 0x00000000 - high 32 bits of section length -| 0x0000000c - section length is 12 bytes; 2 * 4 + 2 + alignment to 32 bits -| 0x20000000 - high 32 bits of address -| 0x0000001c - low 32 bits of address 0x200000000000001c -| 0x00030d41 - 200001 -| 0x000186a2 - 100002 -| 0x26280000 - 38, 40 as bytes, padded with zeros - - For the latter example, the section contents must not be - loaded in memory, and is therefore specified as part of the - special data. The address is usually unimportant but might - provide information for e.g.@: the DWARF 2 debugging format. */ - - mmo_write_tetra_raw (abfd, LOP_SPEC_SECTION); - mmo_write_tetra (abfd, (strlen (sec->name) + 3) / 4); - mmo_write_chunk (abfd, (bfd_byte *) sec->name, strlen (sec->name)); - mmo_flush_chunk (abfd); - /* FIXME: We can get debug sections (.debug_line & Co.) with a section - flag still having SEC_RELOC set. Investigate. This might be true - for all alien sections; perhaps mmo.em should clear that flag. Might - be related to weak references. */ - mmo_write_tetra (abfd, - mmo_sec_flags_from_bfd_flags - (bfd_get_section_flags (abfd, sec))); - mmo_write_octa (abfd, sec->size); - mmo_write_octa (abfd, bfd_get_section_vma (abfd, sec)); - return TRUE; -} - -/* We save up all data before output. */ - -static bfd_boolean -mmo_set_section_contents (bfd *abfd ATTRIBUTE_UNUSED, sec_ptr sec, - const void *location, file_ptr offset, - bfd_size_type bytes_to_do) -{ - /* Iterate over diminishing chunk sizes, copying contents. */ - while (bytes_to_do) - { - /* A minor song-and-dance to make sure we're not bitten by the - distant possibility of the cast from bfd_vma to int making the - chunk zero-sized. */ - int chunk_size - = (int) bytes_to_do != 0 ? bytes_to_do : MMO_SEC_CONTENTS_CHUNK_SIZE; - bfd_byte *loc; - - do - loc = mmo_get_loc (sec, sec->vma + offset, chunk_size); - while (loc == NULL && (chunk_size /= 2) != 0); - - if (chunk_size == 0) - return FALSE; - - memcpy (loc, location, chunk_size); - - location += chunk_size; - bytes_to_do -= chunk_size; - offset += chunk_size; - } - return TRUE; -} - -/* Add a symbol to a trie-tree. */ - -static bfd_boolean -mmo_internal_add_3_sym (bfd *abfd, struct mmo_symbol_trie *rootp, - const struct mmo_symbol *symp) -{ - const char *name = symp->name; - struct mmo_symbol_trie *trie = rootp; - struct mmo_symbol_trie **triep = NULL; - - while (*name && trie != NULL) - { - if (*name < trie->symchar) - { - triep = &trie->left; - trie = trie->left; - } - else if (*name > trie->symchar) - { - triep = &trie->right; - trie = trie->right; - } - else if (*name == trie->symchar) - { - triep = &trie->middle; - name++; - - /* Make sure "trie" points to where we should fill in the - current symbol whenever we've iterated through "name". We - would lose the right position if we encounter "foobar" then - "foo". */ - if (*name) - trie = trie->middle; - } - } - - while (*name != 0) - { - /* Create middle branches for the rest of the characters. */ - trie = bfd_zalloc (abfd, sizeof (struct mmo_symbol_trie)); - *triep = trie; - trie->symchar = *name++; - triep = &trie->middle; - } - - /* We discover a duplicate symbol rather late in the process, but still; - we discover it and bail out. */ - if (trie->sym.name != NULL) - { - (*_bfd_error_handler) - (_("%s: invalid symbol table: duplicate symbol `%s'\n"), - bfd_get_filename (abfd), trie->sym.name); - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - - memcpy (&trie->sym, symp, sizeof *symp); - return TRUE; -} - -/* Find out the length of the serialized version of a trie in bytes. */ - -static unsigned int -mmo_internal_3_length (bfd *abfd, struct mmo_symbol_trie *trie) -{ - /* First, one for the control byte. */ - unsigned int length = 1; - - if (trie == NULL) - return 0; - - /* Add in the recursion to the left. */ - length += mmo_internal_3_length (abfd, trie->left); - - /* Add in the middle trie and the character. */ - length += 1 + mmo_internal_3_length (abfd, trie->middle); - - /* Add in the recursion to the right. */ - length += mmo_internal_3_length (abfd, trie->right); - - /* Add in bytes for the symbol (if this is an endnode). */ - if (trie->sym.name != NULL) - { - unsigned int serno = trie->sym.serno; - - /* First what it takes to encode the value. */ - if (trie->sym.sym_type == mmo_reg_sym) - length++; - else if (trie->sym.sym_type == mmo_undef_sym) - length += 2; - else - { - bfd_vma value = trie->sym.value; - - /* Coded in one to eight following bytes. */ - if (trie->sym.sym_type == mmo_data_sym) - value -= (bfd_vma) 0x20 << 56; - - do - { - value >>= 8; - length++; - } - while (value != 0); - } - - /* Find out what it takes to encode the serial number. */ - do - { - serno >>= 7; - length++; - } - while (serno != 0); - } - - return length; -} - -/* Helper function for outputting the serial number of a symbol, output as - a variant of leb128 (see dwarf2 documentation) which could be called - beb128. Using a helper function and recursion simplifies debugging. */ - -static void -mmo_beb128_out (bfd *abfd, int serno, int marker) -{ - if (serno & ~0x7f) - mmo_beb128_out (abfd, serno >> 7, 0); - mmo_write_byte (abfd, marker | (serno & 0x7f)); -} - -/* Serialize a trie. */ - -static void -mmo_internal_3_dump (bfd *abfd, struct mmo_symbol_trie *trie) -{ - bfd_byte control = 0; - - if (trie == NULL) - return; - - if (trie->left) - control |= MMO3_LEFT; - - if (trie->middle) - control |= MMO3_MIDDLE; - - if (trie->right) - control |= MMO3_RIGHT; - - if (trie->sym.name != NULL) - { - /* Encode the symbol type and length of value bytes. */ - if (trie->sym.sym_type == mmo_reg_sym) - control |= MMO3_REGQUAL_BITS; - else if (trie->sym.sym_type == mmo_undef_sym) - control |= MMO3_UNDEF; - else - { - bfd_vma value = trie->sym.value; - - /* Coded in 1..8 following bytes. */ - if (trie->sym.sym_type == mmo_data_sym) - { - control |= MMO3_DATA; - value -= (bfd_vma) 0x20 << 56; - } - - do - { - value >>= 8; - control++; - } - while (value != 0); - } - } - - /* The control byte is output before recursing. */ - mmo_write_byte (abfd, control); - - mmo_internal_3_dump (abfd, trie->left); - - if (control & MMO3_SYMBITS) - { - mmo_write_byte (abfd, trie->symchar); - - if (trie->sym.name != NULL) - { - if (trie->sym.sym_type == mmo_reg_sym) - mmo_write_byte (abfd, trie->sym.value); - else if (trie->sym.sym_type == mmo_undef_sym) - { - mmo_write_byte (abfd, 0); - mmo_write_byte (abfd, 0); - } - else - { - bfd_vma value = trie->sym.value; - - bfd_byte byte_n = control & 15; - - /* Coded in 1..8 following bytes. Note that the value is - shifted out big-endian. */ - if (trie->sym.sym_type == mmo_data_sym) - { - value -= (bfd_vma) 0x20 << 56; - byte_n -= 8; - } - - do - { - mmo_write_byte (abfd, (value >> ((byte_n - 1) * 8)) & 0xff); - byte_n--; - } - while (byte_n != 0); - } - - mmo_beb128_out (abfd, trie->sym.serno, 128); - } - mmo_internal_3_dump (abfd, trie->middle); - } - mmo_internal_3_dump (abfd, trie->right); -} - -/* Write symbols in mmo format. Also write the lop_end terminator. */ - -static bfd_boolean -mmo_write_symbols_and_terminator (bfd *abfd) -{ - int count = bfd_get_symcount (abfd); - asymbol **table; - asymbol **orig_table = bfd_get_outsymbols (abfd); - int serno; - struct mmo_symbol_trie root; - int trie_len; - int i; - bfd_byte buf[4]; - - /* Create a symbol for "Main". */ - asymbol *fakemain = bfd_make_empty_symbol (abfd); - - fakemain->flags = BSF_GLOBAL; - fakemain->value = bfd_get_start_address (abfd); - fakemain->name = MMIX_START_SYMBOL_NAME; - fakemain->section = bfd_abs_section_ptr; - - memset (&root, 0, sizeof (root)); - - /* Make all symbols take a left turn. */ - root.symchar = 0xff; - - /* There must always be a ":Main", so we'll add one if there are no - symbols. Make sure we have room for it. */ - table = bfd_alloc (abfd, (count + 1) * sizeof (asymbol *)); - if (table == NULL) - return FALSE; - - memcpy (table, orig_table, count * sizeof (asymbol *)); - - /* Move :Main (if there is one) to the first position. This is - necessary to get the same layout of the trie-tree when linking as - when objcopying the result as in the objcopy.exp test "simple objcopy - of executable". It also automatically takes care of assigning serial - number 1 to :Main (as is mandatory). */ - for (i = 0; i < count; i++) - if (table[i] != NULL - && strcmp (table[i]->name, MMIX_START_SYMBOL_NAME) == 0 - && (table[i]->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL) - { - asymbol *mainsym = table[i]; - memcpy (table + 1, orig_table, i * sizeof (asymbol *)); - table[0] = mainsym; - - /* Check that the value assigned to :Main is the same as the entry - address. The default linker script asserts this. This is as - good a place as any to check this consistency. */ - if ((mainsym->value - + mainsym->section->output_section->vma - + mainsym->section->output_offset) - != bfd_get_start_address (abfd)) - { - /* Arbitrary buffer to hold the printable representation of a - vma. */ - char vmas_main[40]; - char vmas_start[40]; - bfd_vma vma_start = bfd_get_start_address (abfd); - - sprintf_vma (vmas_main, mainsym->value); - sprintf_vma (vmas_start, vma_start); - - (*_bfd_error_handler) - (_("%s: Bad symbol definition: `Main' set to %s rather" - " than the start address %s\n"), - bfd_get_filename (abfd), vmas_main, vmas_start); - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - break; - } - if (i == count && count != 0) - { - /* When there are symbols, there must be a :Main. There was no - :Main, so we need to add it manually. */ - memcpy (table + 1, orig_table, count * sizeof (asymbol *)); - table[0] = fakemain; - count++; - } - - for (i = 0, serno = 1; i < count && table[i] != NULL; i++) - { - asymbol *s = table[i]; - - /* It's not enough to consult bfd_is_local_label, since it does not - mean "local" in the sense of linkable-and-observable-after-link. - Let's just check the BSF_GLOBAL flag. - - Also, don't export symbols with characters not in the allowed set. */ - if ((s->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL - && strspn (s->name, - valid_mmo_symbol_character_set) == strlen (s->name)) - { - struct mmo_symbol sym; - memset (&sym, 0, sizeof (sym)); - - /* Need to strip const here; strdup:ing would leak and the - existing string must be safe to reuse. */ - sym.name = (char *) s->name; - sym.value = - s->value - + s->section->output_section->vma - + s->section->output_offset; - - if (bfd_is_und_section (s->section)) - sym.sym_type = mmo_undef_sym; - else if (strcmp (s->section->name, MMO_DATA_SECTION_NAME) == 0 - /* The encoding of data symbols require that the "rest" - of the value fits in 6 bytes, so the upper two bytes - must be 0x2000. All other symbols get to be the - absolute type. */ - && (sym.value >> 48) == 0x2000) - sym.sym_type = mmo_data_sym; - else if (strcmp (s->section->name, MMIX_REG_SECTION_NAME) == 0) - sym.sym_type = mmo_reg_sym; - else if (strcmp (s->section->name, - MMIX_REG_CONTENTS_SECTION_NAME) == 0) - { - sym.sym_type = mmo_reg_sym; - sym.value /= 8; - } - else - sym.sym_type = mmo_abs_sym; - - /* FIXME: We assume the order of the received symbols is an - ordered mapping of the serial numbers. This is not - necessarily true if we e.g. objcopy a mmo file to another and - there are gaps in the numbering. Not sure if this can - happen. Not sure what to do. */ - sym.serno = serno++; - - if (! mmo_internal_add_3_sym (abfd, &root, &sym)) - return FALSE; - } - } - - /* Change the root node to be a ":"-prefix. */ - root.symchar = ':'; - root.middle = root.left; - root.right = NULL; - root.left = NULL; - - /* We have to find out if we can fit the whole symbol table in the mmo - symtab. It would be bad to assume we can always fit it in 262144 - bytes. If we can't, just leave the Main symbol. */ - trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4; - - if (trie_len > 0xffff) - { - /* Test this code by using a lower limit in the test above and check - that the single "Main" symbol is emitted and handled properly. - There's no specific test-case. */ - struct mmo_symbol sym; - - (*_bfd_error_handler) - (_("%s: warning: symbol table too large for mmo, larger than 65535" - " 32-bit words: %d. Only `Main' will be emitted.\n"), - bfd_get_filename (abfd), trie_len); - - memset (&sym, 0, sizeof (sym)); - sym.sym_type = mmo_abs_sym; - sym.name = MMIX_START_SYMBOL_NAME; - sym.serno = 1; - sym.value = bfd_get_start_address (abfd); - - /* Then patch up a symbol table to be just the ":Main" symbol. */ - memset (&root, 0, sizeof (root)); - root.left = root.middle; - root.symchar = 0xff; - root.middle = NULL; - root.right = NULL; - - if (! mmo_internal_add_3_sym (abfd, &root, &sym)) - return FALSE; - - root.symchar = ':'; - root.middle = root.left; - root.right = NULL; - root.left = NULL; - - trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4; - } - - /* Reset the written-bytes counter. */ - abfd->tdata.mmo_data->byte_no = 0; - - /* Put out the lop_stab mark. */ - bfd_put_32 (abfd, (LOP << 24) | (LOP_STAB << 16), buf); - if (bfd_bwrite (buf, 4, abfd) != 4) - return FALSE; - - /* Dump out symbols. */ - mmo_internal_3_dump (abfd, &root); - - if (trie_len != (abfd->tdata.mmo_data->byte_no + 3)/4) - { - /* I haven't seen this trig. It seems no use claiming this case - isn't debugged and abort if we get here. Instead emit a - diagnostic and fail "normally". */ - (*_bfd_error_handler) - (_("%s: internal error, symbol table changed size from %d to %d" - " words\n"), - bfd_get_filename (abfd), trie_len, - (abfd->tdata.mmo_data->byte_no + 3)/4); - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - - /* Dump out remaining bytes in the buffer and handle I/O errors by - propagating errors. */ - if ((abfd->tdata.mmo_data->byte_no % 4) != 0 - || abfd->tdata.mmo_data->have_error) - { - memset (abfd->tdata.mmo_data->buf + (abfd->tdata.mmo_data->byte_no % 4), - 0, 4 - (abfd->tdata.mmo_data->byte_no % 4)); - - if (abfd->tdata.mmo_data->have_error - || bfd_bwrite (abfd->tdata.mmo_data->buf, 4, abfd) != 4) - return FALSE; - } - - bfd_put_32 (abfd, (LOP << 24) | (LOP_END << 16) | trie_len, buf); - return bfd_bwrite (buf, 4, abfd) == 4; -} - -/* Write section unless it is the register contents section. For that, we - instead store the section in the supplied pointer. This function is - used through bfd_map_over_sections. */ - -static void -mmo_write_section_unless_reg_contents (bfd *abfd, asection *sec, void *p) -{ - struct mmo_write_sec_info *infop = (struct mmo_write_sec_info *) p; - - if (! infop->retval) - return; - - if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) - { - infop->reg_section = sec; - return; - } - - /* Exclude the convenience register section. */ - if (strcmp (sec->name, MMIX_REG_SECTION_NAME) == 0) - { - if (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) - { - /* Make sure it hasn't got contents. It seems impossible to - make it carry contents, so we don't have a test-case for - this. */ - (*_bfd_error_handler) - (_("%s: internal error, internal register section %s had" - " contents\n"), - bfd_get_filename (abfd), sec->name); - bfd_set_error (bfd_error_bad_value); - infop->retval = FALSE; - return; - } - - return; - } - - infop->retval = mmo_internal_write_section (abfd, sec); -} - -/* Do the actual output of a file. Assumes mmo_set_section_contents is - already called. */ - -static bfd_boolean -mmo_write_object_contents (bfd *abfd) -{ - struct mmo_write_sec_info wsecinfo; - - /* First, there are a few words of preamble. */ - if (! mmo_internal_write_header (abfd)) - return FALSE; - - wsecinfo.reg_section = NULL; - wsecinfo.retval = TRUE; - - bfd_map_over_sections (abfd, mmo_write_section_unless_reg_contents, - &wsecinfo); - - if (! wsecinfo.retval) - return FALSE; - - if (wsecinfo.reg_section != NULL) - { - asection *sec = wsecinfo.reg_section; - unsigned int z = (unsigned int) (sec->vma / 8); - - /* Registers 0..31 must not be global. Do sanity check on the "vma" - of the register contents section and check that it corresponds to - the length of the section. */ - if (z < 32 || z >= 255 || (sec->vma & 7) != 0 - || sec->vma != 256 * 8 - sec->size - 8) - { - bfd_set_error (bfd_error_bad_value); - - if (sec->size == 0) - /* There must always be at least one such register. */ - (*_bfd_error_handler) - (_("%s: no initialized registers; section length 0\n"), - bfd_get_filename (abfd)); - else if (sec->vma > (256 - 32) * 8) - /* Provide better error message for the case of too many - global registers. */ - (*_bfd_error_handler) - (_("%s: too many initialized registers; section length %ld\n"), - bfd_get_filename (abfd), - (long) sec->size); - else - (*_bfd_error_handler) - (_("%s: invalid start address for initialized registers of" - " length %ld: 0x%lx%08lx\n"), - bfd_get_filename (abfd), - (long) sec->size, - (unsigned long) (sec->vma >> 32), (unsigned long) (sec->vma)); - - return FALSE; - } - - if (! mmo_internal_write_post (abfd, z, sec)) - return FALSE; - } - else - if (! mmo_internal_write_post (abfd, 255, NULL)) - return FALSE; - - return mmo_write_symbols_and_terminator (abfd); -} - -/* If there's anything in particular in a mmo bfd that we want to free, - make this a real function. Only do this if you see major memory - thrashing; zealous free:ing will cause unwanted behavior, especially if - you "free" memory allocated with "bfd_alloc", or even "bfd_release" a - block allocated with "bfd_alloc"; they're really allocated from an - obstack, and we don't know what was allocated there since this - particular allocation. */ - -#define mmo_close_and_cleanup _bfd_generic_close_and_cleanup -#define mmo_bfd_free_cached_info _bfd_generic_bfd_free_cached_info - -/* Perhaps we need to adjust this one; mmo labels (originally) without a - leading ':' might more appropriately be called local. */ -#define mmo_bfd_is_local_label_name bfd_generic_is_local_label_name -#define mmo_bfd_is_target_special_symbol \ - ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) - -/* Is this one really used or defined by anyone? */ -#define mmo_get_lineno _bfd_nosymbols_get_lineno - -/* FIXME: We can do better on this one, if we have a dwarf2 .debug_line - section or if MMO line numbers are implemented. */ -#define mmo_find_nearest_line _bfd_nosymbols_find_nearest_line -#define mmo_find_inliner_info _bfd_nosymbols_find_inliner_info -#define mmo_make_empty_symbol _bfd_generic_make_empty_symbol -#define mmo_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol -#define mmo_read_minisymbols _bfd_generic_read_minisymbols -#define mmo_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol - -#define mmo_get_section_contents_in_window \ - _bfd_generic_get_section_contents_in_window -#define mmo_bfd_get_relocated_section_contents \ - bfd_generic_get_relocated_section_contents -#define mmo_bfd_gc_sections bfd_generic_gc_sections -#define mmo_bfd_lookup_section_flags bfd_generic_lookup_section_flags -#define mmo_bfd_link_hash_table_create _bfd_generic_link_hash_table_create -#define mmo_bfd_link_hash_table_free _bfd_generic_link_hash_table_free -#define mmo_bfd_link_add_symbols _bfd_generic_link_add_symbols -#define mmo_bfd_link_just_syms _bfd_generic_link_just_syms -#define mmo_bfd_copy_link_hash_symbol_type \ - _bfd_generic_copy_link_hash_symbol_type -#define mmo_bfd_final_link _bfd_generic_final_link -#define mmo_bfd_link_split_section _bfd_generic_link_split_section - -/* Strictly speaking, only MMIX uses this restricted format, but let's not - stop anybody from shooting themselves in the foot. */ -#define mmo_set_arch_mach bfd_default_set_arch_mach -#define mmo_bfd_relax_section bfd_generic_relax_section -#define mmo_bfd_merge_sections bfd_generic_merge_sections -#define mmo_bfd_is_group_section bfd_generic_is_group_section -#define mmo_bfd_discard_group bfd_generic_discard_group -#define mmo_section_already_linked \ - _bfd_generic_section_already_linked -#define mmo_bfd_define_common_symbol bfd_generic_define_common_symbol - -/* We want to copy time of creation, otherwise we'd use - BFD_JUMP_TABLE_COPY (_bfd_generic). */ -#define mmo_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data -#define mmo_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data -#define mmo_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data -#define mmo_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data -#define mmo_bfd_set_private_flags _bfd_generic_bfd_set_private_flags -#define mmo_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data - -const bfd_target bfd_mmo_vec = -{ - "mmo", /* name */ - bfd_target_mmo_flavour, - BFD_ENDIAN_BIG, /* target byte order */ - BFD_ENDIAN_BIG, /* target headers byte order */ - - /* FIXME: Might need adjustments. */ - (HAS_RELOC | EXEC_P | /* object flags */ - HAS_LINENO | HAS_DEBUG | - HAS_SYMS | HAS_LOCALS | WP_TEXT), - - /* FIXME: Might need adjustments. */ - (SEC_CODE | SEC_DATA | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD - | SEC_READONLY | SEC_EXCLUDE | SEC_DEBUGGING | SEC_IN_MEMORY), - /* section flags */ - 0, /* leading underscore */ - ' ', /* ar_pad_char */ - 16, /* ar_max_namelen */ - 0, /* match priority. */ - bfd_getb64, bfd_getb_signed_64, bfd_putb64, - bfd_getb32, bfd_getb_signed_32, bfd_putb32, - bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ - bfd_getb64, bfd_getb_signed_64, bfd_putb64, - bfd_getb32, bfd_getb_signed_32, bfd_putb32, - bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ - - { - _bfd_dummy_target, - mmo_object_p, /* bfd_check_format */ - _bfd_dummy_target, - _bfd_dummy_target, - }, - { - bfd_false, - mmo_mkobject, - bfd_false, - bfd_false, - }, - { /* bfd_write_contents */ - bfd_false, - mmo_write_object_contents, - bfd_false, - bfd_false, - }, - - BFD_JUMP_TABLE_GENERIC (mmo), - BFD_JUMP_TABLE_COPY (mmo), - BFD_JUMP_TABLE_CORE (_bfd_nocore), - BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), - BFD_JUMP_TABLE_SYMBOLS (mmo), - BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), - BFD_JUMP_TABLE_WRITE (mmo), - BFD_JUMP_TABLE_LINK (mmo), - BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), - - NULL, - - NULL -}; |