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3313 lines
98 KiB
3313 lines
98 KiB
/* BFD back-end for mmo objects (MMIX-specific object-format). |
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Copyright (C) 2001-2014 Free Software Foundation, Inc. |
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Written by Hans-Peter Nilsson (hp@bitrange.com). |
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Infrastructure and other bits originally copied from srec.c and |
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binary.c. |
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|
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This file is part of BFD, the Binary File Descriptor library. |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 3 of the License, or |
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(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
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MA 02110-1301, USA. */ |
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/* |
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SECTION |
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mmo backend |
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|
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The mmo object format is used exclusively together with Professor |
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Donald E.@: Knuth's educational 64-bit processor MMIX. The simulator |
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@command{mmix} which is available at |
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@url{http://mmix.cs.hm.edu/src/index.html} |
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understands this format. That package also includes a combined |
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assembler and linker called @command{mmixal}. The mmo format has |
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no advantages feature-wise compared to e.g. ELF. It is a simple |
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non-relocatable object format with no support for archives or |
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debugging information, except for symbol value information and |
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line numbers (which is not yet implemented in BFD). See |
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@url{http://mmix.cs.hm.edu/} for more |
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information about MMIX. The ELF format is used for intermediate |
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object files in the BFD implementation. |
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|
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@c We want to xref the symbol table node. A feature in "chew" |
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@c requires that "commands" do not contain spaces in the |
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@c arguments. Hence the hyphen in "Symbol-table". |
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@menu |
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@* File layout:: |
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@* Symbol-table:: |
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@* mmo section mapping:: |
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@end menu |
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|
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INODE |
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File layout, Symbol-table, mmo, mmo |
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SUBSECTION |
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File layout |
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|
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The mmo file contents is not partitioned into named sections as |
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with e.g.@: ELF. Memory areas is formed by specifying the |
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location of the data that follows. Only the memory area |
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@samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} is executable, so |
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it is used for code (and constants) and the area |
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@samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} is used for |
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writable data. @xref{mmo section mapping}. |
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|
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There is provision for specifying ``special data'' of 65536 |
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different types. We use type 80 (decimal), arbitrarily chosen the |
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same as the ELF <<e_machine>> number for MMIX, filling it with |
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section information normally found in ELF objects. @xref{mmo |
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section mapping}. |
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|
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Contents is entered as 32-bit words, xor:ed over previous |
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contents, always zero-initialized. A word that starts with the |
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byte @samp{0x98} forms a command called a @samp{lopcode}, where |
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the next byte distinguished between the thirteen lopcodes. The |
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two remaining bytes, called the @samp{Y} and @samp{Z} fields, or |
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the @samp{YZ} field (a 16-bit big-endian number), are used for |
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various purposes different for each lopcode. As documented in |
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@url{http://mmix.cs.hm.edu/doc/mmixal.pdf}, |
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the lopcodes are: |
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|
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@table @code |
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@item lop_quote |
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0x98000001. The next word is contents, regardless of whether it |
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starts with 0x98 or not. |
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|
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@item lop_loc |
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0x9801YYZZ, where @samp{Z} is 1 or 2. This is a location |
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directive, setting the location for the next data to the next |
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32-bit word (for @math{Z = 1}) or 64-bit word (for @math{Z = 2}), |
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plus @math{Y * 2^56}. Normally @samp{Y} is 0 for the text segment |
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and 2 for the data segment. Beware that the low bits of non- |
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tetrabyte-aligned values are silently discarded when being |
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automatically incremented and when storing contents (in contrast |
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to e.g. its use as current location when followed by lop_fixo |
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et al before the next possibly-quoted tetrabyte contents). |
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|
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@item lop_skip |
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0x9802YYZZ. Increase the current location by @samp{YZ} bytes. |
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|
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@item lop_fixo |
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0x9803YYZZ, where @samp{Z} is 1 or 2. Store the current location |
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as 64 bits into the location pointed to by the next 32-bit |
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(@math{Z = 1}) or 64-bit (@math{Z = 2}) word, plus @math{Y * |
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2^56}. |
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|
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@item lop_fixr |
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0x9804YYZZ. @samp{YZ} is stored into the current location plus |
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@math{2 - 4 * YZ}. |
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|
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@item lop_fixrx |
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0x980500ZZ. @samp{Z} is 16 or 24. A value @samp{L} derived from |
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the following 32-bit word are used in a manner similar to |
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@samp{YZ} in lop_fixr: it is xor:ed into the current location |
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minus @math{4 * L}. The first byte of the word is 0 or 1. If it |
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is 1, then @math{L = (@var{lowest 24 bits of word}) - 2^Z}, if 0, |
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then @math{L = (@var{lowest 24 bits of word})}. |
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|
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@item lop_file |
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0x9806YYZZ. @samp{Y} is the file number, @samp{Z} is count of |
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32-bit words. Set the file number to @samp{Y} and the line |
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counter to 0. The next @math{Z * 4} bytes contain the file name, |
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padded with zeros if the count is not a multiple of four. The |
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same @samp{Y} may occur multiple times, but @samp{Z} must be 0 for |
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all but the first occurrence. |
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|
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@item lop_line |
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0x9807YYZZ. @samp{YZ} is the line number. Together with |
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lop_file, it forms the source location for the next 32-bit word. |
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Note that for each non-lopcode 32-bit word, line numbers are |
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assumed incremented by one. |
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|
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@item lop_spec |
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0x9808YYZZ. @samp{YZ} is the type number. Data until the next |
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lopcode other than lop_quote forms special data of type @samp{YZ}. |
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@xref{mmo section mapping}. |
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|
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Other types than 80, (or type 80 with a content that does not |
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parse) is stored in sections named <<.MMIX.spec_data.@var{n}>> |
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where @var{n} is the @samp{YZ}-type. The flags for such a |
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sections say not to allocate or load the data. The vma is 0. |
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Contents of multiple occurrences of special data @var{n} is |
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concatenated to the data of the previous lop_spec @var{n}s. The |
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location in data or code at which the lop_spec occurred is lost. |
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|
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@item lop_pre |
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0x980901ZZ. The first lopcode in a file. The @samp{Z} field forms the |
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length of header information in 32-bit words, where the first word |
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tells the time in seconds since @samp{00:00:00 GMT Jan 1 1970}. |
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|
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@item lop_post |
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0x980a00ZZ. @math{Z > 32}. This lopcode follows after all |
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content-generating lopcodes in a program. The @samp{Z} field |
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denotes the value of @samp{rG} at the beginning of the program. |
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The following @math{256 - Z} big-endian 64-bit words are loaded |
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into global registers @samp{$G} @dots{} @samp{$255}. |
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|
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@item lop_stab |
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0x980b0000. The next-to-last lopcode in a program. Must follow |
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immediately after the lop_post lopcode and its data. After this |
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lopcode follows all symbols in a compressed format |
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(@pxref{Symbol-table}). |
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|
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@item lop_end |
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0x980cYYZZ. The last lopcode in a program. It must follow the |
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lop_stab lopcode and its data. The @samp{YZ} field contains the |
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number of 32-bit words of symbol table information after the |
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preceding lop_stab lopcode. |
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@end table |
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|
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Note that the lopcode "fixups"; <<lop_fixr>>, <<lop_fixrx>> and |
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<<lop_fixo>> are not generated by BFD, but are handled. They are |
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generated by <<mmixal>>. |
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|
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EXAMPLE |
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This trivial one-label, one-instruction file: |
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| :Main TRAP 1,2,3 |
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can be represented this way in mmo: |
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|
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| 0x98090101 - lop_pre, one 32-bit word with timestamp. |
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| <timestamp> |
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| 0x98010002 - lop_loc, text segment, using a 64-bit address. |
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| Note that mmixal does not emit this for the file above. |
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| 0x00000000 - Address, high 32 bits. |
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| 0x00000000 - Address, low 32 bits. |
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| 0x98060002 - lop_file, 2 32-bit words for file-name. |
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| 0x74657374 - "test" |
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| 0x2e730000 - ".s\0\0" |
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| 0x98070001 - lop_line, line 1. |
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| 0x00010203 - TRAP 1,2,3 |
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| 0x980a00ff - lop_post, setting $255 to 0. |
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| 0x00000000 |
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| 0x00000000 |
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| 0x980b0000 - lop_stab for ":Main" = 0, serial 1. |
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| 0x203a4040 @xref{Symbol-table}. |
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| 0x10404020 |
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| 0x4d206120 |
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| 0x69016e00 |
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| 0x81000000 |
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| 0x980c0005 - lop_end; symbol table contained five 32-bit words. */ |
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|
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#include "sysdep.h" |
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#include "bfd.h" |
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#include "libbfd.h" |
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#include "libiberty.h" |
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#include "elf/mmix.h" |
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#include "opcode/mmix.h" |
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|
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#define LOP 0x98 |
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#define LOP_QUOTE 0 |
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#define LOP_LOC 1 |
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#define LOP_SKIP 2 |
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#define LOP_FIXO 3 |
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#define LOP_FIXR 4 |
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#define LOP_FIXRX 5 |
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#define LOP_FILE 6 |
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#define LOP_LINE 7 |
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#define LOP_SPEC 8 |
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#define LOP_PRE 9 |
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#define LOP_POST 10 |
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#define LOP_STAB 11 |
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#define LOP_END 12 |
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#define LOP_QUOTE_NEXT ((LOP << 24) | (LOP_QUOTE << 16) | 1) |
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#define SPEC_DATA_SECTION 80 |
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#define LOP_SPEC_SECTION \ |
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((LOP << 24) | (LOP_SPEC << 16) | SPEC_DATA_SECTION) |
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|
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/* Must be a power of two. If you change this to be >= 64k, you need a |
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new test-case; the ld test b-loc64k.d touches chunk-size problem areas. */ |
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#define MMO_SEC_CONTENTS_CHUNK_SIZE (1 << 15) |
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|
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/* An arbitrary number for the maximum length section name size. */ |
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#define MAX_SECTION_NAME_SIZE (1024 * 1024) |
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/* A quite arbitrary number for the maximum length section size. */ |
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#define MAX_ARTIFICIAL_SECTION_SIZE (1024 * 1024 * 1024) |
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#define MMO3_WCHAR 0x80 |
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#define MMO3_LEFT 0x40 |
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#define MMO3_MIDDLE 0x20 |
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#define MMO3_RIGHT 0x10 |
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#define MMO3_TYPEBITS 0xf |
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#define MMO3_REGQUAL_BITS 0xf |
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#define MMO3_UNDEF 2 |
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#define MMO3_DATA 8 |
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#define MMO3_SYMBITS 0x2f |
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|
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/* Put these everywhere in new code. */ |
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#define FATAL_DEBUG \ |
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_bfd_abort (__FILE__, __LINE__, \ |
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"Internal: Non-debugged code (test-case missing)") |
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|
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#define BAD_CASE(x) \ |
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_bfd_abort (__FILE__, __LINE__, \ |
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"bad case for " #x) |
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|
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enum mmo_sym_type { mmo_reg_sym, mmo_undef_sym, mmo_data_sym, mmo_abs_sym}; |
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/* When scanning the mmo file, a linked list of mmo_symbol |
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structures is built to represent the symbol table (if there is |
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one). */ |
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|
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struct mmo_symbol |
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{ |
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struct mmo_symbol *next; |
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char *name; |
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bfd_vma value; |
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enum mmo_sym_type sym_type; |
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unsigned int serno; |
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}; |
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struct mmo_data_list_struct |
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{ |
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struct mmo_data_list_struct *next; |
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bfd_vma where; |
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bfd_size_type size; |
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bfd_size_type allocated_size; |
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bfd_byte data[1]; |
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}; |
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typedef struct mmo_data_list_struct mmo_data_list_type; |
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struct mmo_symbol_trie |
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{ |
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struct mmo_symbol_trie *left; |
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struct mmo_symbol_trie *right; |
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struct mmo_symbol_trie *middle; |
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bfd_byte symchar; |
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/* A zero name means there's nothing here. */ |
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struct mmo_symbol sym; |
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}; |
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|
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/* The mmo tdata information. */ |
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|
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struct mmo_data_struct |
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{ |
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struct mmo_symbol *symbols; |
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struct mmo_symbol *symtail; |
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asymbol *csymbols; |
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|
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/* File representation of time (NULL) when this file was created. */ |
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bfd_byte created[4]; |
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|
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/* When we're reading bytes recursively, check this occasionally. |
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Also holds write errors. */ |
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bfd_boolean have_error; |
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|
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/* Max symbol length that may appear in the lop_stab table. Note that |
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this table might just hold a subset of symbols for not-really large |
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programs, as it can only be 65536 * 4 bytes large. */ |
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int max_symbol_length; |
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|
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/* Here's the symbol we build in lop_stab. */ |
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char *lop_stab_symbol; |
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/* Index into lop_stab_symbol for the next character when parsing the |
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symbol information. */ |
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int symbol_position; |
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/* When creating arbitrary sections, we need to count section numbers. */ |
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int sec_no; |
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|
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/* When writing or reading byte-wise, we need to count the bytes |
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within a 32-bit word. */ |
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int byte_no; |
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|
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/* We also need a buffer to hold the bytes we count reading or writing. */ |
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bfd_byte buf[4]; |
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}; |
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typedef struct mmo_data_struct tdata_type; |
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struct mmo_section_data_struct |
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{ |
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mmo_data_list_type *head; |
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mmo_data_list_type *tail; |
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}; |
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|
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#define mmo_section_data(sec) \ |
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((struct mmo_section_data_struct *) (sec)->used_by_bfd) |
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|
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/* These structures are used in bfd_map_over_sections constructs. */ |
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|
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/* Used when writing out sections; all but the register contents section |
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which is stored in reg_section. */ |
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struct mmo_write_sec_info |
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{ |
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asection *reg_section; |
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bfd_boolean retval; |
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}; |
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|
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/* Used when trying to find a section corresponding to addr. */ |
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struct mmo_find_sec_info |
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{ |
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asection *sec; |
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bfd_vma addr; |
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}; |
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static bfd_boolean mmo_bfd_copy_private_bfd_data (bfd *, bfd *); |
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static void mmo_write_section_unless_reg_contents (bfd *, asection *, void *); |
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static void mmo_find_sec_w_addr (bfd *, asection *, void *); |
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static void mmo_find_sec_w_addr_grow (bfd *, asection *, void *); |
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static asection *mmo_make_section (bfd *, const char *); |
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static void mmo_get_symbol_info (bfd *, asymbol *, symbol_info *); |
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static void mmo_print_symbol (bfd *, void *, asymbol *, |
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bfd_print_symbol_type); |
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static void mmo_init (void); |
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static bfd_boolean mmo_mkobject (bfd *); |
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static bfd_boolean mmo_scan (bfd *); |
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static asection *mmo_decide_section (bfd *, bfd_vma); |
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static asection *mmo_get_generic_spec_data_section (bfd *, int); |
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static asection *mmo_get_spec_section (bfd *, int); |
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static INLINE bfd_byte *mmo_get_loc (asection *, bfd_vma, int); |
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static void mmo_xore_64 (asection *, bfd_vma vma, bfd_vma value); |
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static void mmo_xore_32 (asection *, bfd_vma vma, unsigned int); |
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static void mmo_xore_16 (asection *, bfd_vma vma, unsigned int); |
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static const bfd_target *mmo_object_p (bfd *); |
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static void mmo_map_set_sizes (bfd *, asection *, void *); |
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static bfd_boolean mmo_get_symbols (bfd *); |
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static bfd_boolean mmo_create_symbol (bfd *, const char *, bfd_vma, |
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enum mmo_sym_type, unsigned int); |
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static bfd_boolean mmo_get_section_contents (bfd *, asection *, void *, |
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file_ptr, bfd_size_type); |
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static long mmo_get_symtab_upper_bound (bfd *); |
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static long mmo_canonicalize_symtab (bfd *, asymbol **); |
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static void mmo_get_symbol_info (bfd *, asymbol *, symbol_info *); |
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static void mmo_print_symbol (bfd *, void *, asymbol *, |
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bfd_print_symbol_type); |
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static bfd_boolean mmo_set_section_contents (bfd *, sec_ptr, const void *, |
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file_ptr, bfd_size_type); |
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static int mmo_sizeof_headers (bfd *, struct bfd_link_info *); |
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static bfd_boolean mmo_internal_write_header (bfd *); |
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static bfd_boolean mmo_internal_write_post (bfd *, int, asection *); |
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static bfd_boolean mmo_internal_add_3_sym (bfd *, struct mmo_symbol_trie *, |
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const struct mmo_symbol *); |
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static unsigned int mmo_internal_3_length (bfd *, struct mmo_symbol_trie *); |
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static void mmo_internal_3_dump (bfd *, struct mmo_symbol_trie *); |
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static void mmo_beb128_out (bfd *, int, int); |
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static bfd_boolean mmo_internal_write_section (bfd *, asection *); |
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static void mmo_write_tetra (bfd *, unsigned int); |
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static void mmo_write_tetra_raw (bfd *, unsigned int); |
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static void mmo_write_octa (bfd *, bfd_vma); |
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static void mmo_write_octa_raw (bfd *, bfd_vma); |
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static bfd_boolean mmo_write_chunk (bfd *, const bfd_byte *, unsigned int); |
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static bfd_boolean mmo_flush_chunk (bfd *); |
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static bfd_boolean mmo_write_loc_chunk (bfd *, bfd_vma, const bfd_byte *, |
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unsigned int, bfd_vma *); |
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static bfd_boolean mmo_write_chunk_list (bfd *, mmo_data_list_type *); |
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static bfd_boolean mmo_write_loc_chunk_list (bfd *, mmo_data_list_type *); |
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static bfd_boolean mmo_write_symbols_and_terminator (bfd *); |
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static flagword mmo_sec_flags_from_bfd_flags (flagword); |
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static flagword bfd_sec_flags_from_mmo_flags (flagword); |
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static bfd_byte mmo_get_byte (bfd *); |
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static void mmo_write_byte (bfd *, bfd_byte); |
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static bfd_boolean mmo_new_section_hook (bfd *, asection *); |
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static int mmo_sort_mmo_symbols (const void *, const void *); |
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static bfd_boolean mmo_write_object_contents (bfd *); |
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static bfd_boolean mmo_write_section_description (bfd *, asection *); |
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static bfd_boolean mmo_has_leading_or_trailing_zero_tetra_p (bfd *, |
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asection *); |
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|
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/* Global "const" variables initialized once. Must not depend on |
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particular input or caller; put such things into the bfd or elsewhere. |
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Look ma, no static per-invocation data! */ |
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|
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static |
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char valid_mmo_symbol_character_set[/* A-Z a-z (we assume consecutive |
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codes; sorry EBCDIC:ers!). */ |
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+ 'Z' - 'A' + 1 + 'z' - 'a' + 1 |
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/* Digits. */ |
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+ 10 |
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/* ':' and '_'. */ |
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+ 1 + 1 |
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/* Codes higher than 126. */ |
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+ 256 - 126 |
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/* Ending zero. */ |
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+ 1]; |
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|
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/* Get section SECNAME or create one if it doesn't exist. When creating |
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one, new memory for the name is allocated. */ |
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|
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static asection * |
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mmo_make_section (bfd *abfd, const char *secname) |
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{ |
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asection *sec = bfd_get_section_by_name (abfd, secname); |
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|
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if (sec == NULL) |
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{ |
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char *newsecname = strdup (secname); |
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|
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if (newsecname == NULL) |
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{ |
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(*_bfd_error_handler) |
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(_("%s: No core to allocate section name %s\n"), |
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bfd_get_filename (abfd), secname); |
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bfd_set_error (bfd_error_system_call); |
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return NULL; |
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} |
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sec = bfd_make_section (abfd, newsecname); |
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} |
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|
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return sec; |
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} |
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|
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/* Nothing to do, but keep as a placeholder if we need it. |
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Note that state that might differ between bfd:s must not be initialized |
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here, nor must it be static. Add it to tdata information instead. */ |
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|
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static void |
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mmo_init (void) |
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{ |
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static bfd_boolean inited = FALSE; |
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int i = 0; |
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int j = 0; |
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static const char letters[] |
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= "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789:_"; |
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|
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if (inited) |
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return; |
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inited = TRUE; |
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|
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/* Fill in the set of valid symbol characters. */ |
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strcpy (valid_mmo_symbol_character_set, letters); |
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i = strlen (letters); |
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|
|
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) |
|
{ |
|
/* We must have flushed a previous remainder if we get one from |
|
this chunk too. */ |
|
BFD_ASSERT (mmop->byte_no == 0); |
|
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 (aligned) 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 (and will not add any) or else 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 ((vma & 3) == 0 |
|
&& (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; |
|
} |
|
|
|
if ((len & 3) == 0) |
|
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); |
|
|
|
/* This should not happen during normal usage, but can presumably |
|
happen with an erroneous linker-script, so handle gracefully. |
|
Avoid Knuth-specific terms in the message, such as "tetrabyte". |
|
Note that this function will get non-4-multiple lengths and |
|
unaligned vmas but those come in tuples (mostly pairs) and are |
|
continuous (i.e. the if-condition above false) and they are |
|
group-wise aligned. */ |
|
if ((vma & 3) != 0) |
|
{ |
|
(*_bfd_error_handler) |
|
(_("%s: attempt to emit contents at non-multiple-of-4 address 0x%lx\n"), |
|
bfd_get_filename (abfd), (unsigned long) vma); |
|
bfd_set_error (bfd_error_bad_value); |
|
return FALSE; |
|
} |
|
|
|
/* 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 the |
|
MMIXware package which also contains the @command{mmix} simulator: |
|
``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; |
|
|
|
vma &= ~3; |
|
mmo_xore_32 (sec, vma, bfd_get_32 (abfd, buf)); |
|
vma += 4; |
|
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; |
|
} |
|
|
|
/* When we decide which section the data goes into, we might |
|
create the section. If that happens, make sure the VMA at |
|
creation time is tetra-aligned. */ |
|
sec = mmo_decide_section (abfd, vma & ~3); |
|
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_line _bfd_nosymbols_find_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_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 |
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#define mmo_bfd_relax_section bfd_generic_relax_section |
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#define mmo_bfd_merge_sections bfd_generic_merge_sections |
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#define mmo_bfd_is_group_section bfd_generic_is_group_section |
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#define mmo_bfd_discard_group bfd_generic_discard_group |
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#define mmo_section_already_linked \ |
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_bfd_generic_section_already_linked |
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#define mmo_bfd_define_common_symbol bfd_generic_define_common_symbol |
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|
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/* We want to copy time of creation, otherwise we'd use |
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BFD_JUMP_TABLE_COPY (_bfd_generic). */ |
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#define mmo_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data |
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#define mmo_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data |
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#define mmo_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data |
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#define mmo_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data |
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#define mmo_bfd_set_private_flags _bfd_generic_bfd_set_private_flags |
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#define mmo_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data |
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const bfd_target mmix_mmo_vec = |
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{ |
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"mmo", /* name */ |
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bfd_target_mmo_flavour, |
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BFD_ENDIAN_BIG, /* target byte order */ |
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BFD_ENDIAN_BIG, /* target headers byte order */ |
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|
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/* FIXME: Might need adjustments. */ |
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(HAS_RELOC | EXEC_P | /* object flags */ |
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HAS_LINENO | HAS_DEBUG | |
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HAS_SYMS | HAS_LOCALS | WP_TEXT), |
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|
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/* FIXME: Might need adjustments. */ |
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(SEC_CODE | SEC_DATA | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD |
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| SEC_READONLY | SEC_EXCLUDE | SEC_DEBUGGING | SEC_IN_MEMORY), |
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/* section flags */ |
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0, /* leading underscore */ |
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' ', /* ar_pad_char */ |
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16, /* ar_max_namelen */ |
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0, /* match priority. */ |
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bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
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bfd_getb32, bfd_getb_signed_32, bfd_putb32, |
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bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ |
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bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
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bfd_getb32, bfd_getb_signed_32, bfd_putb32, |
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bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ |
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|
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{ |
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_bfd_dummy_target, |
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mmo_object_p, /* bfd_check_format */ |
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_bfd_dummy_target, |
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_bfd_dummy_target, |
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}, |
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{ |
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bfd_false, |
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mmo_mkobject, |
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bfd_false, |
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bfd_false, |
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}, |
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{ /* bfd_write_contents */ |
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bfd_false, |
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mmo_write_object_contents, |
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bfd_false, |
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bfd_false, |
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}, |
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|
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BFD_JUMP_TABLE_GENERIC (mmo), |
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BFD_JUMP_TABLE_COPY (mmo), |
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BFD_JUMP_TABLE_CORE (_bfd_nocore), |
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BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), |
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BFD_JUMP_TABLE_SYMBOLS (mmo), |
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BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), |
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BFD_JUMP_TABLE_WRITE (mmo), |
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BFD_JUMP_TABLE_LINK (mmo), |
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BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
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|
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NULL, |
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|
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NULL |
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};
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