2545 lines
68 KiB
C
2545 lines
68 KiB
C
/* Support for the generic parts of most COFF variants, for BFD.
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Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
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Written by Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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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 2 of the License, or
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(at your option) any later version.
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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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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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/*
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Most of this hacked by Steve Chamberlain,
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sac@cygnus.com
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*/
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/*
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SECTION
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coff backends
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BFD supports a number of different flavours of coff format.
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The major differences between formats are the sizes and
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alignments of fields in structures on disk, and the occasional
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extra field.
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Coff in all its varieties is implemented with a few common
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files and a number of implementation specific files. For
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example, The 88k bcs coff format is implemented in the file
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@file{coff-m88k.c}. This file @code{#include}s
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@file{coff/m88k.h} which defines the external structure of the
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coff format for the 88k, and @file{coff/internal.h} which
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defines the internal structure. @file{coff-m88k.c} also
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defines the relocations used by the 88k format
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@xref{Relocations}.
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The Intel i960 processor version of coff is implemented in
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@file{coff-i960.c}. This file has the same structure as
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@file{coff-m88k.c}, except that it includes @file{coff/i960.h}
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rather than @file{coff-m88k.h}.
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SUBSECTION
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Porting to a new version of coff
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The recommended method is to select from the existing
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implementations the version of coff which is most like the one
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you want to use. For example, we'll say that i386 coff is
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the one you select, and that your coff flavour is called foo.
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Copy @file{i386coff.c} to @file{foocoff.c}, copy
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@file{../include/coff/i386.h} to @file{../include/coff/foo.h},
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and add the lines to @file{targets.c} and @file{Makefile.in}
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so that your new back end is used. Alter the shapes of the
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structures in @file{../include/coff/foo.h} so that they match
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what you need. You will probably also have to add
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@code{#ifdef}s to the code in @file{coff/internal.h} and
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@file{coffcode.h} if your version of coff is too wild.
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You can verify that your new BFD backend works quite simply by
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building @file{objdump} from the @file{binutils} directory,
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and making sure that its version of what's going on and your
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host system's idea (assuming it has the pretty standard coff
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dump utility, usually called @code{att-dump} or just
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@code{dump}) are the same. Then clean up your code, and send
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what you've done to Cygnus. Then your stuff will be in the
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next release, and you won't have to keep integrating it.
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SUBSECTION
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How the coff backend works
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SUBSUBSECTION
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File layout
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The Coff backend is split into generic routines that are
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applicable to any Coff target and routines that are specific
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to a particular target. The target-specific routines are
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further split into ones which are basically the same for all
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Coff targets except that they use the external symbol format
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or use different values for certain constants.
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The generic routines are in @file{coffgen.c}. These routines
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work for any Coff target. They use some hooks into the target
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specific code; the hooks are in a @code{bfd_coff_backend_data}
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structure, one of which exists for each target.
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The essentially similar target-specific routines are in
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@file{coffcode.h}. This header file includes executable C code.
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The various Coff targets first include the appropriate Coff
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header file, make any special defines that are needed, and
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then include @file{coffcode.h}.
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Some of the Coff targets then also have additional routines in
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the target source file itself.
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For example, @file{coff-i960.c} includes
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@file{coff/internal.h} and @file{coff/i960.h}. It then
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defines a few constants, such as @code{I960}, and includes
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@file{coffcode.h}. Since the i960 has complex relocation
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types, @file{coff-i960.c} also includes some code to
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manipulate the i960 relocs. This code is not in
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@file{coffcode.h} because it would not be used by any other
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target.
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SUBSUBSECTION
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Bit twiddling
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Each flavour of coff supported in BFD has its own header file
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describing the external layout of the structures. There is also
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an internal description of the coff layout, in
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@file{coff/internal.h}. A major function of the
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coff backend is swapping the bytes and twiddling the bits to
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translate the external form of the structures into the normal
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internal form. This is all performed in the
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@code{bfd_swap}_@i{thing}_@i{direction} routines. Some
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elements are different sizes between different versions of
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coff; it is the duty of the coff version specific include file
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to override the definitions of various packing routines in
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@file{coffcode.h}. E.g., the size of line number entry in coff is
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sometimes 16 bits, and sometimes 32 bits. @code{#define}ing
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@code{PUT_LNSZ_LNNO} and @code{GET_LNSZ_LNNO} will select the
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correct one. No doubt, some day someone will find a version of
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coff which has a varying field size not catered to at the
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moment. To port BFD, that person will have to add more @code{#defines}.
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Three of the bit twiddling routines are exported to
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@code{gdb}; @code{coff_swap_aux_in}, @code{coff_swap_sym_in}
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and @code{coff_swap_linno_in}. @code{GDB} reads the symbol
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table on its own, but uses BFD to fix things up. More of the
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bit twiddlers are exported for @code{gas};
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@code{coff_swap_aux_out}, @code{coff_swap_sym_out},
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@code{coff_swap_lineno_out}, @code{coff_swap_reloc_out},
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@code{coff_swap_filehdr_out}, @code{coff_swap_aouthdr_out},
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@code{coff_swap_scnhdr_out}. @code{Gas} currently keeps track
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of all the symbol table and reloc drudgery itself, thereby
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saving the internal BFD overhead, but uses BFD to swap things
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on the way out, making cross ports much safer. Doing so also
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allows BFD (and thus the linker) to use the same header files
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as @code{gas}, which makes one avenue to disaster disappear.
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SUBSUBSECTION
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Symbol reading
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The simple canonical form for symbols used by BFD is not rich
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enough to keep all the information available in a coff symbol
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table. The back end gets around this problem by keeping the original
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symbol table around, "behind the scenes".
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When a symbol table is requested (through a call to
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@code{bfd_canonicalize_symtab}), a request gets through to
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@code{coff_get_normalized_symtab}. This reads the symbol table from
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the coff file and swaps all the structures inside into the
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internal form. It also fixes up all the pointers in the table
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(represented in the file by offsets from the first symbol in
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the table) into physical pointers to elements in the new
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internal table. This involves some work since the meanings of
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fields change depending upon context: a field that is a
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pointer to another structure in the symbol table at one moment
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may be the size in bytes of a structure at the next. Another
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pass is made over the table. All symbols which mark file names
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(<<C_FILE>> symbols) are modified so that the internal
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string points to the value in the auxent (the real filename)
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rather than the normal text associated with the symbol
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(@code{".file"}).
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At this time the symbol names are moved around. Coff stores
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all symbols less than nine characters long physically
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within the symbol table; longer strings are kept at the end of
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the file in the string table. This pass moves all strings
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into memory and replaces them with pointers to the strings.
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The symbol table is massaged once again, this time to create
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the canonical table used by the BFD application. Each symbol
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is inspected in turn, and a decision made (using the
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@code{sclass} field) about the various flags to set in the
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@code{asymbol}. @xref{Symbols}. The generated canonical table
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shares strings with the hidden internal symbol table.
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Any linenumbers are read from the coff file too, and attached
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to the symbols which own the functions the linenumbers belong to.
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SUBSUBSECTION
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Symbol writing
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Writing a symbol to a coff file which didn't come from a coff
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file will lose any debugging information. The @code{asymbol}
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structure remembers the BFD from which the symbol was taken, and on
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output the back end makes sure that the same destination target as
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source target is present.
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When the symbols have come from a coff file then all the
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debugging information is preserved.
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Symbol tables are provided for writing to the back end in a
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vector of pointers to pointers. This allows applications like
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the linker to accumulate and output large symbol tables
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without having to do too much byte copying.
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This function runs through the provided symbol table and
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patches each symbol marked as a file place holder
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(@code{C_FILE}) to point to the next file place holder in the
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list. It also marks each @code{offset} field in the list with
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the offset from the first symbol of the current symbol.
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Another function of this procedure is to turn the canonical
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value form of BFD into the form used by coff. Internally, BFD
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expects symbol values to be offsets from a section base; so a
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symbol physically at 0x120, but in a section starting at
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0x100, would have the value 0x20. Coff expects symbols to
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contain their final value, so symbols have their values
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changed at this point to reflect their sum with their owning
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section. This transformation uses the
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<<output_section>> field of the @code{asymbol}'s
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@code{asection} @xref{Sections}.
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o <<coff_mangle_symbols>>
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This routine runs though the provided symbol table and uses
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the offsets generated by the previous pass and the pointers
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generated when the symbol table was read in to create the
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structured hierachy required by coff. It changes each pointer
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to a symbol into the index into the symbol table of the asymbol.
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o <<coff_write_symbols>>
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This routine runs through the symbol table and patches up the
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symbols from their internal form into the coff way, calls the
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bit twiddlers, and writes out the table to the file.
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*/
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/*
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INTERNAL_DEFINITION
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coff_symbol_type
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DESCRIPTION
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The hidden information for an <<asymbol>> is described in a
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<<combined_entry_type>>:
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CODE_FRAGMENT
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.
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.typedef struct coff_ptr_struct
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.{
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.
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. {* Remembers the offset from the first symbol in the file for
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. this symbol. Generated by coff_renumber_symbols. *}
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.unsigned int offset;
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.
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. {* Should the value of this symbol be renumbered. Used for
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. XCOFF C_BSTAT symbols. Set by coff_slurp_symbol_table. *}
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.unsigned int fix_value : 1;
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.
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. {* Should the tag field of this symbol be renumbered.
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. Created by coff_pointerize_aux. *}
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.unsigned int fix_tag : 1;
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.
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. {* Should the endidx field of this symbol be renumbered.
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. Created by coff_pointerize_aux. *}
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.unsigned int fix_end : 1;
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.
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. {* Should the x_csect.x_scnlen field be renumbered.
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. Created by coff_slurp_symbol_table. *}
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.unsigned int fix_scnlen : 1;
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.
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. {* The container for the symbol structure as read and translated
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. from the file. *}
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.
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.union {
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. union internal_auxent auxent;
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. struct internal_syment syment;
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. } u;
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.} combined_entry_type;
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.
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.
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.{* Each canonical asymbol really looks like this: *}
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.
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.typedef struct coff_symbol_struct
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.{
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. {* The actual symbol which the rest of BFD works with *}
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.asymbol symbol;
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.
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. {* A pointer to the hidden information for this symbol *}
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.combined_entry_type *native;
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.
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. {* A pointer to the linenumber information for this symbol *}
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.struct lineno_cache_entry *lineno;
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.
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. {* Have the line numbers been relocated yet ? *}
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.boolean done_lineno;
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.} coff_symbol_type;
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*/
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#include "coffswap.h"
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/* void warning(); */
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/*
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* Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
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* incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
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* NOTE: If you add to/change this routine, you should mirror the changes
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* in styp_to_sec_flags().
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*/
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static long
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sec_to_styp_flags (sec_name, sec_flags)
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CONST char *sec_name;
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flagword sec_flags;
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{
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long styp_flags = 0;
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if (!strcmp (sec_name, _TEXT))
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{
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styp_flags = STYP_TEXT;
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}
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else if (!strcmp (sec_name, _DATA))
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{
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styp_flags = STYP_DATA;
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#ifdef TWO_DATA_SECS
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}
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else if (!strcmp (sec_name, ".data2"))
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{
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styp_flags = STYP_DATA;
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#endif /* TWO_DATA_SECS */
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}
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else if (!strcmp (sec_name, _BSS))
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{
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styp_flags = STYP_BSS;
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#ifdef _COMMENT
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}
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else if (!strcmp (sec_name, _COMMENT))
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{
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styp_flags = STYP_INFO;
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#endif /* _COMMENT */
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#ifdef _LIB
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}
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else if (!strcmp (sec_name, _LIB))
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{
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styp_flags = STYP_LIB;
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#endif /* _LIB */
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#ifdef _LIT
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}
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else if (!strcmp (sec_name, _LIT))
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{
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styp_flags = STYP_LIT;
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#endif /* _LIT */
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}
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else if (!strcmp (sec_name, ".debug"))
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{
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#ifdef STYP_DEBUG
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styp_flags = STYP_DEBUG;
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#else
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styp_flags = STYP_INFO;
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#endif
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}
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else if (!strcmp (sec_name, ".stab")
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|| !strncmp (sec_name, ".stabstr", 8))
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{
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styp_flags = STYP_INFO;
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}
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/* Try and figure out what it should be */
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else if (sec_flags & SEC_CODE)
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{
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styp_flags = STYP_TEXT;
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}
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else if (sec_flags & SEC_DATA)
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{
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styp_flags = STYP_DATA;
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}
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else if (sec_flags & SEC_READONLY)
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{
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#ifdef STYP_LIT /* 29k readonly text/data section */
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styp_flags = STYP_LIT;
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#else
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styp_flags = STYP_TEXT;
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#endif /* STYP_LIT */
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}
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else if (sec_flags & SEC_LOAD)
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{
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styp_flags = STYP_TEXT;
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}
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else if (sec_flags & SEC_ALLOC)
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{
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styp_flags = STYP_BSS;
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}
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#ifdef STYP_NOLOAD
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if ((sec_flags & (SEC_NEVER_LOAD | SEC_COFF_SHARED_LIBRARY)) != 0)
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styp_flags |= STYP_NOLOAD;
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||
#endif
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return (styp_flags);
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||
}
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||
/*
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||
* Return a word with SEC_* flags set to represent the incoming
|
||
* STYP_* flags (from scnhdr.s_flags). The inverse of this
|
||
* function is sec_to_styp_flags().
|
||
* NOTE: If you add to/change this routine, you should mirror the changes
|
||
* in sec_to_styp_flags().
|
||
*/
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||
static flagword
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||
styp_to_sec_flags (abfd, hdr)
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||
bfd * abfd;
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||
PTR hdr;
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||
{
|
||
struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr;
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||
long styp_flags = internal_s->s_flags;
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||
flagword sec_flags = 0;
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||
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||
#ifdef STYP_NOLOAD
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||
if (styp_flags & STYP_NOLOAD)
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||
{
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||
sec_flags |= SEC_NEVER_LOAD;
|
||
}
|
||
#endif /* STYP_NOLOAD */
|
||
|
||
/* For 386 COFF, at least, an unloadable text or data section is
|
||
actually a shared library section. */
|
||
if (styp_flags & STYP_TEXT)
|
||
{
|
||
if (sec_flags & SEC_NEVER_LOAD)
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||
sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY;
|
||
else
|
||
sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC;
|
||
}
|
||
else if (styp_flags & STYP_DATA)
|
||
{
|
||
if (sec_flags & SEC_NEVER_LOAD)
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||
sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY;
|
||
else
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||
sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC;
|
||
}
|
||
else if (styp_flags & STYP_BSS)
|
||
{
|
||
#ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
|
||
if (sec_flags & SEC_NEVER_LOAD)
|
||
sec_flags |= SEC_ALLOC | SEC_COFF_SHARED_LIBRARY;
|
||
else
|
||
#endif
|
||
sec_flags |= SEC_ALLOC;
|
||
}
|
||
else if (styp_flags & STYP_INFO)
|
||
{
|
||
/* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
|
||
defined. coff_compute_section_file_positions uses
|
||
COFF_PAGE_SIZE to ensure that the low order bits of the
|
||
section VMA and the file offset match. If we don't know
|
||
COFF_PAGE_SIZE, we can't ensure the correct correspondence,
|
||
and demand page loading of the file will fail. */
|
||
#ifdef COFF_PAGE_SIZE
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||
sec_flags |= SEC_DEBUGGING;
|
||
#endif
|
||
}
|
||
else
|
||
{
|
||
sec_flags |= SEC_ALLOC | SEC_LOAD;
|
||
}
|
||
|
||
#ifdef STYP_LIT /* A29k readonly text/data section type */
|
||
if ((styp_flags & STYP_LIT) == STYP_LIT)
|
||
{
|
||
sec_flags = (SEC_LOAD | SEC_ALLOC | SEC_READONLY);
|
||
}
|
||
#endif /* STYP_LIT */
|
||
#ifdef STYP_OTHER_LOAD /* Other loaded sections */
|
||
if (styp_flags & STYP_OTHER_LOAD)
|
||
{
|
||
sec_flags = (SEC_LOAD | SEC_ALLOC);
|
||
}
|
||
#endif /* STYP_SDATA */
|
||
|
||
return (sec_flags);
|
||
}
|
||
|
||
#define get_index(symbol) ((long) (symbol)->udata)
|
||
|
||
/*
|
||
INTERNAL_DEFINITION
|
||
bfd_coff_backend_data
|
||
|
||
CODE_FRAGMENT
|
||
|
||
Special entry points for gdb to swap in coff symbol table parts:
|
||
.typedef struct
|
||
.{
|
||
. void (*_bfd_coff_swap_aux_in) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR ext,
|
||
. int type,
|
||
. int class,
|
||
. int indaux,
|
||
. int numaux,
|
||
. PTR in));
|
||
.
|
||
. void (*_bfd_coff_swap_sym_in) PARAMS ((
|
||
. bfd *abfd ,
|
||
. PTR ext,
|
||
. PTR in));
|
||
.
|
||
. void (*_bfd_coff_swap_lineno_in) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR ext,
|
||
. PTR in));
|
||
.
|
||
|
||
Special entry points for gas to swap out coff parts:
|
||
|
||
. unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR in,
|
||
. int type,
|
||
. int class,
|
||
. int indaux,
|
||
. int numaux,
|
||
. PTR ext));
|
||
.
|
||
. unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR in,
|
||
. PTR ext));
|
||
.
|
||
. unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR in,
|
||
. PTR ext));
|
||
.
|
||
. unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR src,
|
||
. PTR dst));
|
||
.
|
||
. unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR in,
|
||
. PTR out));
|
||
.
|
||
. unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR in,
|
||
. PTR out));
|
||
.
|
||
. unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR in,
|
||
. PTR out));
|
||
.
|
||
|
||
Special entry points for generic COFF routines to call target
|
||
dependent COFF routines:
|
||
|
||
. unsigned int _bfd_filhsz;
|
||
. unsigned int _bfd_aoutsz;
|
||
. unsigned int _bfd_scnhsz;
|
||
. unsigned int _bfd_symesz;
|
||
. unsigned int _bfd_auxesz;
|
||
. unsigned int _bfd_linesz;
|
||
. boolean _bfd_coff_long_filenames;
|
||
. void (*_bfd_coff_swap_filehdr_in) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR ext,
|
||
. PTR in));
|
||
. void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR ext,
|
||
. PTR in));
|
||
. void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR ext,
|
||
. PTR in));
|
||
. boolean (*_bfd_coff_bad_format_hook) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR internal_filehdr));
|
||
. boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR internal_filehdr));
|
||
. PTR (*_bfd_coff_mkobject_hook) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR internal_filehdr,
|
||
. PTR internal_aouthdr));
|
||
. flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR internal_scnhdr));
|
||
. asection *(*_bfd_make_section_hook) PARAMS ((
|
||
. bfd *abfd,
|
||
. char *name));
|
||
. void (*_bfd_set_alignment_hook) PARAMS ((
|
||
. bfd *abfd,
|
||
. asection *sec,
|
||
. PTR internal_scnhdr));
|
||
. boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
|
||
. bfd *abfd));
|
||
. boolean (*_bfd_coff_symname_in_debug) PARAMS ((
|
||
. bfd *abfd,
|
||
. struct internal_syment *sym));
|
||
. void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
|
||
. bfd *abfd,
|
||
. struct bfd_link_info *link_info,
|
||
. struct bfd_link_order *link_order,
|
||
. arelent *reloc,
|
||
. bfd_byte *data,
|
||
. unsigned int *src_ptr,
|
||
. unsigned int *dst_ptr));
|
||
. int (*_bfd_coff_reloc16_estimate) PARAMS ((
|
||
. bfd *abfd,
|
||
. asection *input_section,
|
||
. arelent *r,
|
||
. unsigned int shrink,
|
||
. struct bfd_link_info *link_info));
|
||
.
|
||
.} bfd_coff_backend_data;
|
||
.
|
||
.#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
|
||
.
|
||
.#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
|
||
. ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
|
||
.
|
||
.#define bfd_coff_swap_sym_in(a,e,i) \
|
||
. ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
|
||
.
|
||
.#define bfd_coff_swap_lineno_in(a,e,i) \
|
||
. ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
|
||
.
|
||
.#define bfd_coff_swap_reloc_out(abfd, i, o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_swap_lineno_out(abfd, i, o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
|
||
. ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
|
||
.
|
||
.#define bfd_coff_swap_sym_out(abfd, i,o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_swap_filehdr_out(abfd, i,o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
|
||
.#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
|
||
.#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
|
||
.#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
|
||
.#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
|
||
.#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
|
||
.#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
|
||
.#define bfd_coff_swap_filehdr_in(abfd, i,o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_bad_format_hook(abfd, filehdr) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
|
||
.
|
||
.#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
|
||
. ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
|
||
.#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
|
||
. ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
|
||
.
|
||
.#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr)\
|
||
. ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr))
|
||
.
|
||
.#define bfd_coff_make_section_hook(abfd, name)\
|
||
. ((coff_backend_info (abfd)->_bfd_make_section_hook) (abfd, name))
|
||
.
|
||
.#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
|
||
. ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
|
||
.
|
||
.#define bfd_coff_slurp_symbol_table(abfd)\
|
||
. ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
|
||
.
|
||
.#define bfd_coff_symname_in_debug(abfd, sym)\
|
||
. ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
|
||
.
|
||
.#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\
|
||
. ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
|
||
. (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
|
||
.
|
||
.#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
|
||
. ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
|
||
. (abfd, section, reloc, shrink, link_info))
|
||
.
|
||
*/
|
||
|
||
/* See whether the magic number matches. */
|
||
|
||
static boolean
|
||
coff_bad_format_hook (abfd, filehdr)
|
||
bfd * abfd;
|
||
PTR filehdr;
|
||
{
|
||
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
|
||
|
||
if (BADMAG (*internal_f))
|
||
return false;
|
||
|
||
/* if the optional header is NULL or not the correct size then
|
||
quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
|
||
and Intel 960 readwrite headers (I960WRMAGIC) is that the
|
||
optional header is of a different size.
|
||
|
||
But the mips keeps extra stuff in it's opthdr, so dont check
|
||
when doing that
|
||
*/
|
||
|
||
#if defined(M88) || defined(I960)
|
||
if (internal_f->f_opthdr != 0 && AOUTSZ != internal_f->f_opthdr)
|
||
return false;
|
||
#endif
|
||
|
||
return true;
|
||
}
|
||
|
||
static asection *
|
||
coff_make_section_hook (abfd, name)
|
||
bfd * abfd;
|
||
char *name;
|
||
{
|
||
#ifdef TWO_DATA_SECS
|
||
/* FIXME: This predates the call to bfd_make_section_anyway
|
||
in make_a_section_from_file, and can probably go away. */
|
||
/* On SCO a file created by the Microsoft assembler can have two
|
||
.data sections. We use .data2 for the second one. */
|
||
if (strcmp (name, _DATA) == 0)
|
||
return bfd_make_section (abfd, ".data2");
|
||
#endif
|
||
return (asection *) NULL;
|
||
}
|
||
|
||
/*
|
||
initialize a section structure with information peculiar to this
|
||
particular implementation of coff
|
||
*/
|
||
|
||
static boolean
|
||
coff_new_section_hook (abfd, section)
|
||
bfd * abfd;
|
||
asection * section;
|
||
{
|
||
section->alignment_power = abfd->xvec->align_power_min;
|
||
/* Allocate aux records for section symbols, to store size and
|
||
related info.
|
||
|
||
@@ Shouldn't use constant multiplier here! */
|
||
coffsymbol (section->symbol)->native =
|
||
(combined_entry_type *) bfd_zalloc (abfd,
|
||
sizeof (combined_entry_type) * 10);
|
||
|
||
#ifdef COFF_SPARC
|
||
/* This is to allow double-word operations on addresses in data or bss. */
|
||
if (strcmp (section->name, ".data") == 0
|
||
|| strcmp (section->name, ".bss") == 0)
|
||
section->alignment_power = 3;
|
||
#endif /* COFF_SPARC */
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
#ifdef I960
|
||
|
||
/* Set the alignment of a BFD section. */
|
||
|
||
static void
|
||
coff_set_alignment_hook (abfd, section, scnhdr)
|
||
bfd * abfd;
|
||
asection * section;
|
||
PTR scnhdr;
|
||
{
|
||
struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
|
||
unsigned int i;
|
||
|
||
for (i = 0; i < 32; i++)
|
||
if ((1 << i) >= hdr->s_align)
|
||
break;
|
||
section->alignment_power = i;
|
||
}
|
||
|
||
#else /* ! I960 */
|
||
|
||
#define coff_set_alignment_hook \
|
||
((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
|
||
|
||
#endif /* ! I960 */
|
||
|
||
static boolean
|
||
coff_mkobject (abfd)
|
||
bfd * abfd;
|
||
{
|
||
coff_data_type *coff;
|
||
|
||
abfd->tdata.coff_obj_data = (struct coff_tdata *) bfd_zalloc (abfd, sizeof (coff_data_type));
|
||
if (abfd->tdata.coff_obj_data == 0)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return false;
|
||
}
|
||
coff = coff_data (abfd);
|
||
coff->symbols = (coff_symbol_type *) NULL;
|
||
coff->conversion_table = (unsigned int *) NULL;
|
||
coff->raw_syments = (struct coff_ptr_struct *) NULL;
|
||
coff->raw_linenos = (struct lineno *) NULL;
|
||
coff->relocbase = 0;
|
||
/* make_abs_section(abfd);*/
|
||
return true;
|
||
}
|
||
|
||
/* Create the COFF backend specific information. */
|
||
|
||
static PTR
|
||
coff_mkobject_hook (abfd, filehdr, aouthdr)
|
||
bfd * abfd;
|
||
PTR filehdr;
|
||
PTR aouthdr;
|
||
{
|
||
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
|
||
coff_data_type *coff;
|
||
|
||
if (coff_mkobject (abfd) == false)
|
||
return NULL;
|
||
|
||
coff = coff_data (abfd);
|
||
|
||
coff->sym_filepos = internal_f->f_symptr;
|
||
coff->flags = internal_f->f_flags;
|
||
|
||
/* These members communicate important constants about the symbol
|
||
table to GDB's symbol-reading code. These `constants'
|
||
unfortunately vary among coff implementations... */
|
||
coff->local_n_btmask = N_BTMASK;
|
||
coff->local_n_btshft = N_BTSHFT;
|
||
coff->local_n_tmask = N_TMASK;
|
||
coff->local_n_tshift = N_TSHIFT;
|
||
coff->local_symesz = SYMESZ;
|
||
coff->local_auxesz = AUXESZ;
|
||
coff->local_linesz = LINESZ;
|
||
|
||
return (PTR) coff;
|
||
}
|
||
|
||
/* Determine the machine architecture and type. FIXME: This is target
|
||
dependent because the magic numbers are defined in the target
|
||
dependent header files. But there is no particular need for this.
|
||
If the magic numbers were moved to a separate file, this function
|
||
would be target independent and would also be much more successful
|
||
at linking together COFF files for different architectures. */
|
||
|
||
static boolean
|
||
coff_set_arch_mach_hook (abfd, filehdr)
|
||
bfd *abfd;
|
||
PTR filehdr;
|
||
{
|
||
long machine;
|
||
enum bfd_architecture arch;
|
||
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
|
||
|
||
machine = 0;
|
||
switch (internal_f->f_magic)
|
||
{
|
||
#ifdef I386MAGIC
|
||
case I386MAGIC:
|
||
case I386PTXMAGIC:
|
||
case I386AIXMAGIC: /* Danbury PS/2 AIX C Compiler */
|
||
case LYNXCOFFMAGIC: /* shadows the m68k Lynx number below, sigh */
|
||
arch = bfd_arch_i386;
|
||
machine = 0;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef A29K_MAGIC_BIG
|
||
case A29K_MAGIC_BIG:
|
||
case A29K_MAGIC_LITTLE:
|
||
arch = bfd_arch_a29k;
|
||
machine = 0;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef MC68MAGIC
|
||
case MC68MAGIC:
|
||
case M68MAGIC:
|
||
#ifdef MC68KBCSMAGIC
|
||
case MC68KBCSMAGIC:
|
||
#endif
|
||
#ifdef APOLLOM68KMAGIC
|
||
case APOLLOM68KMAGIC:
|
||
#endif
|
||
#ifdef LYNXCOFFMAGIC
|
||
case LYNXCOFFMAGIC:
|
||
#endif
|
||
arch = bfd_arch_m68k;
|
||
machine = 68020;
|
||
break;
|
||
#endif
|
||
#ifdef MC88MAGIC
|
||
case MC88MAGIC:
|
||
case MC88DMAGIC:
|
||
case MC88OMAGIC:
|
||
arch = bfd_arch_m88k;
|
||
machine = 88100;
|
||
break;
|
||
#endif
|
||
#ifdef Z8KMAGIC
|
||
case Z8KMAGIC:
|
||
arch = bfd_arch_z8k;
|
||
switch (internal_f->f_flags & F_MACHMASK)
|
||
{
|
||
case F_Z8001:
|
||
machine = bfd_mach_z8001;
|
||
break;
|
||
case F_Z8002:
|
||
machine = bfd_mach_z8002;
|
||
break;
|
||
default:
|
||
return false;
|
||
}
|
||
break;
|
||
#endif
|
||
#ifdef I960
|
||
#ifdef I960ROMAGIC
|
||
case I960ROMAGIC:
|
||
case I960RWMAGIC:
|
||
arch = bfd_arch_i960;
|
||
switch (F_I960TYPE & internal_f->f_flags)
|
||
{
|
||
default:
|
||
case F_I960CORE:
|
||
machine = bfd_mach_i960_core;
|
||
break;
|
||
case F_I960KB:
|
||
machine = bfd_mach_i960_kb_sb;
|
||
break;
|
||
case F_I960MC:
|
||
machine = bfd_mach_i960_mc;
|
||
break;
|
||
case F_I960XA:
|
||
machine = bfd_mach_i960_xa;
|
||
break;
|
||
case F_I960CA:
|
||
machine = bfd_mach_i960_ca;
|
||
break;
|
||
case F_I960KA:
|
||
machine = bfd_mach_i960_ka_sa;
|
||
break;
|
||
}
|
||
break;
|
||
#endif
|
||
#endif
|
||
|
||
#ifdef U802ROMAGIC
|
||
case U802ROMAGIC:
|
||
case U802WRMAGIC:
|
||
case U802TOCMAGIC:
|
||
arch = bfd_arch_rs6000;
|
||
machine = 6000;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef WE32KMAGIC
|
||
case WE32KMAGIC:
|
||
arch = bfd_arch_we32k;
|
||
machine = 0;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef H8300MAGIC
|
||
case H8300MAGIC:
|
||
arch = bfd_arch_h8300;
|
||
machine = bfd_mach_h8300;
|
||
/* !! FIXME this probably isn't the right place for this */
|
||
abfd->flags |= BFD_IS_RELAXABLE;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef H8300HMAGIC
|
||
case H8300HMAGIC:
|
||
arch = bfd_arch_h8300;
|
||
machine = bfd_mach_h8300h;
|
||
/* !! FIXME this probably isn't the right place for this */
|
||
abfd->flags |= BFD_IS_RELAXABLE;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef SH_ARCH_MAGIC
|
||
case SH_ARCH_MAGIC:
|
||
arch = bfd_arch_sh;
|
||
machine = 0;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef H8500MAGIC
|
||
case H8500MAGIC:
|
||
arch = bfd_arch_h8500;
|
||
machine = 0;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef SPARCMAGIC
|
||
case SPARCMAGIC:
|
||
#ifdef LYNXCOFFMAGIC
|
||
case LYNXCOFFMAGIC:
|
||
#endif
|
||
arch = bfd_arch_sparc;
|
||
machine = 0;
|
||
break;
|
||
#endif
|
||
|
||
default: /* Unreadable input file type */
|
||
arch = bfd_arch_obscure;
|
||
break;
|
||
}
|
||
|
||
bfd_default_set_arch_mach (abfd, arch, machine);
|
||
return true;
|
||
}
|
||
|
||
#ifdef SYMNAME_IN_DEBUG
|
||
|
||
static boolean
|
||
symname_in_debug_hook (abfd, sym)
|
||
bfd * abfd;
|
||
struct internal_syment *sym;
|
||
{
|
||
return SYMNAME_IN_DEBUG (sym) ? true : false;
|
||
}
|
||
|
||
#else
|
||
|
||
#define symname_in_debug_hook \
|
||
(boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
|
||
|
||
#endif
|
||
|
||
/*
|
||
SUBSUBSECTION
|
||
Writing relocations
|
||
|
||
To write relocations, the back end steps though the
|
||
canonical relocation table and create an
|
||
@code{internal_reloc}. The symbol index to use is removed from
|
||
the @code{offset} field in the symbol table supplied. The
|
||
address comes directly from the sum of the section base
|
||
address and the relocation offset; the type is dug directly
|
||
from the howto field. Then the @code{internal_reloc} is
|
||
swapped into the shape of an @code{external_reloc} and written
|
||
out to disk.
|
||
|
||
*/
|
||
|
||
static boolean
|
||
coff_write_relocs (abfd)
|
||
bfd * abfd;
|
||
{
|
||
asection *s;
|
||
for (s = abfd->sections; s != (asection *) NULL; s = s->next)
|
||
{
|
||
unsigned int i;
|
||
struct external_reloc dst;
|
||
|
||
arelent **p = s->orelocation;
|
||
if (bfd_seek (abfd, s->rel_filepos, SEEK_SET) != 0)
|
||
return false;
|
||
for (i = 0; i < s->reloc_count; i++)
|
||
{
|
||
struct internal_reloc n;
|
||
arelent *q = p[i];
|
||
memset ((PTR) & n, 0, sizeof (n));
|
||
|
||
n.r_vaddr = q->address + s->vma;
|
||
|
||
#ifdef R_IHCONST
|
||
/* The 29k const/consth reloc pair is a real kludge. The consth
|
||
part doesn't have a symbol; it has an offset. So rebuilt
|
||
that here. */
|
||
if (q->howto->type == R_IHCONST)
|
||
n.r_symndx = q->addend;
|
||
else
|
||
#endif
|
||
if (q->sym_ptr_ptr)
|
||
{
|
||
if (q->sym_ptr_ptr == bfd_abs_section_ptr->symbol_ptr_ptr)
|
||
/* This is a relocation relative to the absolute symbol. */
|
||
n.r_symndx = -1;
|
||
else
|
||
{
|
||
n.r_symndx = get_index ((*(q->sym_ptr_ptr)));
|
||
/* Take notice if the symbol reloc points to a symbol
|
||
we don't have in our symbol table. What should we
|
||
do for this?? */
|
||
if (n.r_symndx > obj_conv_table_size (abfd))
|
||
abort ();
|
||
}
|
||
}
|
||
|
||
#ifdef SWAP_OUT_RELOC_OFFSET
|
||
n.r_offset = q->addend;
|
||
#endif
|
||
|
||
#ifdef SELECT_RELOC
|
||
/* Work out reloc type from what is required */
|
||
SELECT_RELOC (n, q->howto);
|
||
#else
|
||
n.r_type = q->howto->type;
|
||
#endif
|
||
coff_swap_reloc_out (abfd, &n, &dst);
|
||
if (bfd_write ((PTR) & dst, 1, RELSZ, abfd) != RELSZ)
|
||
return false;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Set flags and magic number of a coff file from architecture and machine
|
||
type. Result is true if we can represent the arch&type, false if not. */
|
||
|
||
static boolean
|
||
coff_set_flags (abfd, magicp, flagsp)
|
||
bfd * abfd;
|
||
unsigned *magicp;
|
||
unsigned short *flagsp;
|
||
{
|
||
switch (bfd_get_arch (abfd))
|
||
{
|
||
#ifdef Z8KMAGIC
|
||
case bfd_arch_z8k:
|
||
*magicp = Z8KMAGIC;
|
||
switch (bfd_get_mach (abfd))
|
||
{
|
||
case bfd_mach_z8001:
|
||
*flagsp = F_Z8001;
|
||
break;
|
||
case bfd_mach_z8002:
|
||
*flagsp = F_Z8002;
|
||
break;
|
||
default:
|
||
return false;
|
||
}
|
||
return true;
|
||
#endif
|
||
#ifdef I960ROMAGIC
|
||
|
||
case bfd_arch_i960:
|
||
|
||
{
|
||
unsigned flags;
|
||
*magicp = I960ROMAGIC;
|
||
/*
|
||
((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
|
||
I960RWMAGIC); FIXME???
|
||
*/
|
||
switch (bfd_get_mach (abfd))
|
||
{
|
||
case bfd_mach_i960_core:
|
||
flags = F_I960CORE;
|
||
break;
|
||
case bfd_mach_i960_kb_sb:
|
||
flags = F_I960KB;
|
||
break;
|
||
case bfd_mach_i960_mc:
|
||
flags = F_I960MC;
|
||
break;
|
||
case bfd_mach_i960_xa:
|
||
flags = F_I960XA;
|
||
break;
|
||
case bfd_mach_i960_ca:
|
||
flags = F_I960CA;
|
||
break;
|
||
case bfd_mach_i960_ka_sa:
|
||
flags = F_I960KA;
|
||
break;
|
||
default:
|
||
return false;
|
||
}
|
||
*flagsp = flags;
|
||
return true;
|
||
}
|
||
break;
|
||
#endif
|
||
#ifdef I386MAGIC
|
||
case bfd_arch_i386:
|
||
*magicp = I386MAGIC;
|
||
#ifdef LYNXOS
|
||
/* Just overwrite the usual value if we're doing Lynx. */
|
||
*magicp = LYNXCOFFMAGIC;
|
||
#endif
|
||
return true;
|
||
break;
|
||
#endif
|
||
#ifdef MC68MAGIC
|
||
case bfd_arch_m68k:
|
||
#ifdef APOLLOM68KMAGIC
|
||
*magicp = APOLLO_COFF_VERSION_NUMBER;
|
||
#else
|
||
*magicp = MC68MAGIC;
|
||
#endif
|
||
#ifdef LYNXOS
|
||
/* Just overwrite the usual value if we're doing Lynx. */
|
||
*magicp = LYNXCOFFMAGIC;
|
||
#endif
|
||
return true;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef MC88MAGIC
|
||
case bfd_arch_m88k:
|
||
*magicp = MC88OMAGIC;
|
||
return true;
|
||
break;
|
||
#endif
|
||
#ifdef H8300MAGIC
|
||
case bfd_arch_h8300:
|
||
switch (bfd_get_mach (abfd))
|
||
{
|
||
case bfd_mach_h8300:
|
||
*magicp = H8300MAGIC;
|
||
return true;
|
||
case bfd_mach_h8300h:
|
||
*magicp = H8300HMAGIC;
|
||
return true;
|
||
}
|
||
break;
|
||
#endif
|
||
|
||
#ifdef SH_ARCH_MAGIC
|
||
case bfd_arch_sh:
|
||
*magicp = SH_ARCH_MAGIC;
|
||
return true;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef SPARCMAGIC
|
||
case bfd_arch_sparc:
|
||
*magicp = SPARCMAGIC;
|
||
#ifdef LYNXOS
|
||
/* Just overwrite the usual value if we're doing Lynx. */
|
||
*magicp = LYNXCOFFMAGIC;
|
||
#endif
|
||
return true;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef H8500MAGIC
|
||
case bfd_arch_h8500:
|
||
*magicp = H8500MAGIC;
|
||
return true;
|
||
break;
|
||
#endif
|
||
#ifdef A29K_MAGIC_BIG
|
||
case bfd_arch_a29k:
|
||
if (abfd->xvec->byteorder_big_p)
|
||
*magicp = A29K_MAGIC_BIG;
|
||
else
|
||
*magicp = A29K_MAGIC_LITTLE;
|
||
return true;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef WE32KMAGIC
|
||
case bfd_arch_we32k:
|
||
*magicp = WE32KMAGIC;
|
||
return true;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef U802TOCMAGIC
|
||
case bfd_arch_rs6000:
|
||
case bfd_arch_powerpc:
|
||
*magicp = U802TOCMAGIC;
|
||
return true;
|
||
break;
|
||
#endif
|
||
|
||
default: /* Unknown architecture */
|
||
/* return false; -- fall through to "return false" below, to avoid
|
||
"statement never reached" errors on the one below. */
|
||
break;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
|
||
static boolean
|
||
coff_set_arch_mach (abfd, arch, machine)
|
||
bfd * abfd;
|
||
enum bfd_architecture arch;
|
||
unsigned long machine;
|
||
{
|
||
unsigned dummy1;
|
||
unsigned short dummy2;
|
||
|
||
if (! bfd_default_set_arch_mach (abfd, arch, machine))
|
||
return false;
|
||
|
||
if (arch != bfd_arch_unknown &&
|
||
coff_set_flags (abfd, &dummy1, &dummy2) != true)
|
||
return false; /* We can't represent this type */
|
||
|
||
return true; /* We're easy ... */
|
||
}
|
||
|
||
|
||
/* Calculate the file position for each section. */
|
||
|
||
static void
|
||
coff_compute_section_file_positions (abfd)
|
||
bfd * abfd;
|
||
{
|
||
asection *current;
|
||
asection *previous = (asection *) NULL;
|
||
file_ptr sofar = FILHSZ;
|
||
#ifndef I960
|
||
file_ptr old_sofar;
|
||
#endif
|
||
if (bfd_get_start_address (abfd))
|
||
{
|
||
/* A start address may have been added to the original file. In this
|
||
case it will need an optional header to record it. */
|
||
abfd->flags |= EXEC_P;
|
||
}
|
||
|
||
if (abfd->flags & EXEC_P)
|
||
sofar += AOUTSZ;
|
||
|
||
sofar += abfd->section_count * SCNHSZ;
|
||
for (current = abfd->sections;
|
||
current != (asection *) NULL;
|
||
current = current->next)
|
||
{
|
||
|
||
/* Only deal with sections which have contents */
|
||
if (!(current->flags & SEC_HAS_CONTENTS))
|
||
continue;
|
||
|
||
/* Align the sections in the file to the same boundary on
|
||
which they are aligned in virtual memory. I960 doesn't
|
||
do this (FIXME) so we can stay in sync with Intel. 960
|
||
doesn't yet page from files... */
|
||
#ifndef I960
|
||
{
|
||
/* make sure this section is aligned on the right boundary - by
|
||
padding the previous section up if necessary */
|
||
|
||
old_sofar = sofar;
|
||
sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
|
||
if (previous != (asection *) NULL)
|
||
{
|
||
previous->_raw_size += sofar - old_sofar;
|
||
}
|
||
}
|
||
|
||
#endif
|
||
|
||
#ifdef COFF_PAGE_SIZE
|
||
/* In demand paged files the low order bits of the file offset
|
||
must match the low order bits of the virtual address. */
|
||
if ((abfd->flags & D_PAGED) != 0)
|
||
sofar += (current->vma - sofar) % COFF_PAGE_SIZE;
|
||
#endif
|
||
|
||
current->filepos = sofar;
|
||
|
||
sofar += current->_raw_size;
|
||
#ifndef I960
|
||
/* make sure that this section is of the right size too */
|
||
old_sofar = sofar;
|
||
sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
|
||
current->_raw_size += sofar - old_sofar;
|
||
#endif
|
||
|
||
#ifdef _LIB
|
||
/* Force .lib sections to start at zero. The vma is then
|
||
incremented in coff_set_section_contents. This is right for
|
||
SVR3.2. */
|
||
if (strcmp (current->name, _LIB) == 0)
|
||
bfd_set_section_vma (abfd, current, 0);
|
||
#endif
|
||
|
||
previous = current;
|
||
}
|
||
obj_relocbase (abfd) = sofar;
|
||
}
|
||
|
||
#ifndef RS6000COFF_C
|
||
|
||
/* If .file, .text, .data, .bss symbols are missing, add them. */
|
||
/* @@ Should we only be adding missing symbols, or overriding the aux
|
||
values for existing section symbols? */
|
||
static boolean
|
||
coff_add_missing_symbols (abfd)
|
||
bfd *abfd;
|
||
{
|
||
unsigned int nsyms = bfd_get_symcount (abfd);
|
||
asymbol **sympp = abfd->outsymbols;
|
||
asymbol **sympp2;
|
||
unsigned int i;
|
||
int need_text = 1, need_data = 1, need_bss = 1, need_file = 1;
|
||
|
||
for (i = 0; i < nsyms; i++)
|
||
{
|
||
coff_symbol_type *csym = coff_symbol_from (abfd, sympp[i]);
|
||
CONST char *name;
|
||
if (csym)
|
||
{
|
||
/* only do this if there is a coff representation of the input
|
||
symbol */
|
||
if (csym->native && csym->native->u.syment.n_sclass == C_FILE)
|
||
{
|
||
need_file = 0;
|
||
continue;
|
||
}
|
||
name = csym->symbol.name;
|
||
if (!name)
|
||
continue;
|
||
if (!strcmp (name, _TEXT))
|
||
need_text = 0;
|
||
#ifdef APOLLO_M68
|
||
else if (!strcmp (name, ".wtext"))
|
||
need_text = 0;
|
||
#endif
|
||
else if (!strcmp (name, _DATA))
|
||
need_data = 0;
|
||
else if (!strcmp (name, _BSS))
|
||
need_bss = 0;
|
||
}
|
||
}
|
||
/* Now i == bfd_get_symcount (abfd). */
|
||
/* @@ For now, don't deal with .file symbol. */
|
||
need_file = 0;
|
||
|
||
if (!need_text && !need_data && !need_bss && !need_file)
|
||
return true;
|
||
nsyms += need_text + need_data + need_bss + need_file;
|
||
sympp2 = (asymbol **) bfd_alloc_by_size_t (abfd, nsyms * sizeof (asymbol *));
|
||
if (!sympp2)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return false;
|
||
}
|
||
memcpy (sympp2, sympp, i * sizeof (asymbol *));
|
||
if (need_file)
|
||
{
|
||
/* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
|
||
abort ();
|
||
}
|
||
if (need_text)
|
||
sympp2[i++] = coff_section_symbol (abfd, _TEXT);
|
||
if (need_data)
|
||
sympp2[i++] = coff_section_symbol (abfd, _DATA);
|
||
if (need_bss)
|
||
sympp2[i++] = coff_section_symbol (abfd, _BSS);
|
||
BFD_ASSERT (i == nsyms);
|
||
bfd_set_symtab (abfd, sympp2, nsyms);
|
||
return true;
|
||
}
|
||
|
||
#endif /* ! defined (RS6000COFF_C) */
|
||
|
||
/* SUPPRESS 558 */
|
||
/* SUPPRESS 529 */
|
||
static boolean
|
||
coff_write_object_contents (abfd)
|
||
bfd * abfd;
|
||
{
|
||
asection *current;
|
||
unsigned int count;
|
||
|
||
boolean hasrelocs = false;
|
||
boolean haslinno = false;
|
||
file_ptr reloc_base;
|
||
file_ptr lineno_base;
|
||
file_ptr sym_base;
|
||
file_ptr scn_base;
|
||
file_ptr data_base;
|
||
unsigned long reloc_size = 0;
|
||
unsigned long lnno_size = 0;
|
||
asection *text_sec = NULL;
|
||
asection *data_sec = NULL;
|
||
asection *bss_sec = NULL;
|
||
|
||
struct internal_filehdr internal_f;
|
||
struct internal_aouthdr internal_a;
|
||
|
||
|
||
bfd_set_error (bfd_error_system_call);
|
||
/* Number the output sections, starting from one on the first section
|
||
with a name which doesn't start with a *.
|
||
@@ The code doesn't make this check. Is it supposed to be done,
|
||
or isn't it?? */
|
||
count = 1;
|
||
for (current = abfd->sections; current != (asection *) NULL;
|
||
current = current->next)
|
||
{
|
||
current->target_index = count;
|
||
count++;
|
||
}
|
||
|
||
if (abfd->output_has_begun == false)
|
||
{
|
||
coff_compute_section_file_positions (abfd);
|
||
}
|
||
|
||
if (abfd->sections != (asection *) NULL)
|
||
{
|
||
scn_base = abfd->sections->filepos;
|
||
}
|
||
else
|
||
{
|
||
scn_base = 0;
|
||
}
|
||
if (bfd_seek (abfd, scn_base, SEEK_SET) != 0)
|
||
return false;
|
||
reloc_base = obj_relocbase (abfd);
|
||
|
||
/* Make a pass through the symbol table to count line number entries and
|
||
put them into the correct asections */
|
||
|
||
lnno_size = coff_count_linenumbers (abfd) * LINESZ;
|
||
data_base = scn_base;
|
||
|
||
/* Work out the size of the reloc and linno areas */
|
||
|
||
for (current = abfd->sections; current != NULL; current =
|
||
current->next)
|
||
{
|
||
/* We give section headers to +ve indexes */
|
||
if (current->target_index > 0)
|
||
{
|
||
|
||
reloc_size += current->reloc_count * RELSZ;
|
||
data_base += SCNHSZ;
|
||
}
|
||
|
||
}
|
||
|
||
lineno_base = reloc_base + reloc_size;
|
||
sym_base = lineno_base + lnno_size;
|
||
|
||
/* Indicate in each section->line_filepos its actual file address */
|
||
for (current = abfd->sections; current != NULL; current =
|
||
current->next)
|
||
{
|
||
if (current->target_index > 0)
|
||
{
|
||
|
||
if (current->lineno_count)
|
||
{
|
||
current->line_filepos = lineno_base;
|
||
current->moving_line_filepos = lineno_base;
|
||
lineno_base += current->lineno_count * LINESZ;
|
||
}
|
||
else
|
||
{
|
||
current->line_filepos = 0;
|
||
}
|
||
if (current->reloc_count)
|
||
{
|
||
current->rel_filepos = reloc_base;
|
||
reloc_base += current->reloc_count * RELSZ;
|
||
}
|
||
else
|
||
{
|
||
current->rel_filepos = 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
|
||
/* Write section headers to the file. */
|
||
internal_f.f_nscns = 0;
|
||
if (bfd_seek (abfd,
|
||
(file_ptr) ((abfd->flags & EXEC_P) ?
|
||
(FILHSZ + AOUTSZ) : FILHSZ),
|
||
SEEK_SET)
|
||
!= 0)
|
||
return false;
|
||
|
||
{
|
||
#if 0
|
||
unsigned int pad = abfd->flags & D_PAGED ? data_base : 0;
|
||
#endif
|
||
unsigned int pad = 0;
|
||
|
||
for (current = abfd->sections;
|
||
current != NULL;
|
||
current = current->next)
|
||
{
|
||
struct internal_scnhdr section;
|
||
if (current->target_index > 0)
|
||
{
|
||
internal_f.f_nscns++;
|
||
strncpy (&(section.s_name[0]), current->name, 8);
|
||
#ifdef _LIB
|
||
/* Always set s_vaddr of .lib to 0. This is right for SVR3.2
|
||
Ian Taylor <ian@cygnus.com>. */
|
||
if (strcmp (current->name, _LIB) == 0)
|
||
section.s_vaddr = 0;
|
||
else
|
||
#endif
|
||
section.s_vaddr = current->lma + pad;
|
||
section.s_paddr = current->lma + pad;
|
||
section.s_size = current->_raw_size - pad;
|
||
/*
|
||
If this section has no size or is unloadable then the scnptr
|
||
will be 0 too
|
||
*/
|
||
if (current->_raw_size - pad == 0 ||
|
||
(current->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
|
||
{
|
||
section.s_scnptr = 0;
|
||
}
|
||
else
|
||
{
|
||
section.s_scnptr = current->filepos;
|
||
}
|
||
section.s_relptr = current->rel_filepos;
|
||
section.s_lnnoptr = current->line_filepos;
|
||
section.s_nreloc = current->reloc_count;
|
||
section.s_nlnno = current->lineno_count;
|
||
if (current->reloc_count != 0)
|
||
hasrelocs = true;
|
||
if (current->lineno_count != 0)
|
||
haslinno = true;
|
||
|
||
section.s_flags = sec_to_styp_flags (current->name, current->flags);
|
||
|
||
if (!strcmp (current->name, _TEXT))
|
||
{
|
||
text_sec = current;
|
||
}
|
||
else if (!strcmp (current->name, _DATA))
|
||
{
|
||
data_sec = current;
|
||
#ifdef TWO_DATA_SECS
|
||
}
|
||
else if (!strcmp (current->name, ".data2"))
|
||
{
|
||
data_sec = current;
|
||
#endif /* TWO_DATA_SECS */
|
||
}
|
||
else if (!strcmp (current->name, _BSS))
|
||
{
|
||
bss_sec = current;
|
||
}
|
||
|
||
#ifdef I960
|
||
section.s_align = (current->alignment_power
|
||
? 1 << current->alignment_power
|
||
: 0);
|
||
|
||
#endif
|
||
{
|
||
SCNHDR buff;
|
||
|
||
coff_swap_scnhdr_out (abfd, §ion, &buff);
|
||
if (bfd_write ((PTR) (&buff), 1, SCNHSZ, abfd) != SCNHSZ)
|
||
return false;
|
||
|
||
}
|
||
|
||
pad = 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
/* OK, now set up the filehdr... */
|
||
|
||
/* Don't include the internal abs section in the section count */
|
||
|
||
/*
|
||
We will NOT put a fucking timestamp in the header here. Every time you
|
||
put it back, I will come in and take it out again. I'm sorry. This
|
||
field does not belong here. We fill it with a 0 so it compares the
|
||
same but is not a reasonable time. -- gnu@cygnus.com
|
||
*/
|
||
internal_f.f_timdat = 0;
|
||
|
||
if (bfd_get_symcount (abfd) != 0)
|
||
internal_f.f_symptr = sym_base;
|
||
else
|
||
internal_f.f_symptr = 0;
|
||
|
||
internal_f.f_flags = 0;
|
||
|
||
if (abfd->flags & EXEC_P)
|
||
internal_f.f_opthdr = AOUTSZ;
|
||
else
|
||
internal_f.f_opthdr = 0;
|
||
|
||
if (!hasrelocs)
|
||
internal_f.f_flags |= F_RELFLG;
|
||
if (!haslinno)
|
||
internal_f.f_flags |= F_LNNO;
|
||
if (0 == bfd_get_symcount (abfd))
|
||
internal_f.f_flags |= F_LSYMS;
|
||
if (abfd->flags & EXEC_P)
|
||
internal_f.f_flags |= F_EXEC;
|
||
|
||
if (!abfd->xvec->byteorder_big_p)
|
||
internal_f.f_flags |= F_AR32WR;
|
||
else
|
||
internal_f.f_flags |= F_AR32W;
|
||
|
||
/*
|
||
FIXME, should do something about the other byte orders and
|
||
architectures.
|
||
*/
|
||
|
||
memset (&internal_a, 0, sizeof internal_a);
|
||
|
||
/* Set up architecture-dependent stuff */
|
||
|
||
{
|
||
unsigned int magic = 0;
|
||
unsigned short flags = 0;
|
||
coff_set_flags (abfd, &magic, &flags);
|
||
internal_f.f_magic = magic;
|
||
internal_f.f_flags |= flags;
|
||
/* ...and the "opt"hdr... */
|
||
|
||
#ifdef A29K
|
||
#ifdef ULTRA3 /* NYU's machine */
|
||
/* FIXME: This is a bogus check. I really want to see if there
|
||
* is a .shbss or a .shdata section, if so then set the magic
|
||
* number to indicate a shared data executable.
|
||
*/
|
||
if (internal_f.f_nscns >= 7)
|
||
internal_a.magic = SHMAGIC; /* Shared magic */
|
||
else
|
||
#endif /* ULTRA3 */
|
||
internal_a.magic = NMAGIC;/* Assume separate i/d */
|
||
#define __A_MAGIC_SET__
|
||
#endif /* A29K */
|
||
#ifdef I960
|
||
internal_a.magic = (magic == I960ROMAGIC ? NMAGIC : OMAGIC);
|
||
#define __A_MAGIC_SET__
|
||
#endif /* I960 */
|
||
#if M88
|
||
#define __A_MAGIC_SET__
|
||
internal_a.magic = PAGEMAGICBCS;
|
||
#endif /* M88 */
|
||
|
||
#if APOLLO_M68
|
||
#define __A_MAGIC_SET__
|
||
internal_a.magic = APOLLO_COFF_VERSION_NUMBER;
|
||
#endif
|
||
|
||
#if M68 || WE32K
|
||
#define __A_MAGIC_SET__
|
||
/* Never was anything here for the 68k */
|
||
#endif /* M68 || WE32K */
|
||
|
||
#if I386
|
||
#define __A_MAGIC_SET__
|
||
internal_a.magic = ZMAGIC;
|
||
#endif /* I386 */
|
||
|
||
#if RS6000COFF_C
|
||
#define __A_MAGIC_SET__
|
||
internal_a.magic = (abfd->flags & D_PAGED) ? RS6K_AOUTHDR_ZMAGIC :
|
||
(abfd->flags & WP_TEXT) ? RS6K_AOUTHDR_NMAGIC :
|
||
RS6K_AOUTHDR_OMAGIC;
|
||
#endif
|
||
|
||
#ifndef __A_MAGIC_SET__
|
||
#include "Your aouthdr magic number is not being set!"
|
||
#else
|
||
#undef __A_MAGIC_SET__
|
||
#endif
|
||
}
|
||
/* Now should write relocs, strings, syms */
|
||
obj_sym_filepos (abfd) = sym_base;
|
||
|
||
if (bfd_get_symcount (abfd) != 0)
|
||
{
|
||
#ifndef RS6000COFF_C
|
||
if (!coff_add_missing_symbols (abfd))
|
||
return false;
|
||
#endif
|
||
if (!coff_renumber_symbols (abfd))
|
||
return false;
|
||
coff_mangle_symbols (abfd);
|
||
if (! coff_write_symbols (abfd))
|
||
return false;
|
||
if (! coff_write_linenumbers (abfd))
|
||
return false;
|
||
if (! coff_write_relocs (abfd))
|
||
return false;
|
||
}
|
||
if (text_sec)
|
||
{
|
||
internal_a.tsize = bfd_get_section_size_before_reloc (text_sec);
|
||
internal_a.text_start = internal_a.tsize ? text_sec->vma : 0;
|
||
}
|
||
if (data_sec)
|
||
{
|
||
internal_a.dsize = bfd_get_section_size_before_reloc (data_sec);
|
||
internal_a.data_start = internal_a.dsize ? data_sec->vma : 0;
|
||
}
|
||
if (bss_sec)
|
||
{
|
||
internal_a.bsize = bfd_get_section_size_before_reloc (bss_sec);
|
||
}
|
||
|
||
internal_a.entry = bfd_get_start_address (abfd);
|
||
internal_f.f_nsyms = bfd_get_symcount (abfd);
|
||
|
||
/* now write them */
|
||
if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
|
||
return false;
|
||
{
|
||
FILHDR buff;
|
||
coff_swap_filehdr_out (abfd, (PTR) & internal_f, (PTR) & buff);
|
||
if (bfd_write ((PTR) & buff, 1, FILHSZ, abfd) != FILHSZ)
|
||
return false;
|
||
}
|
||
if (abfd->flags & EXEC_P)
|
||
{
|
||
AOUTHDR buff;
|
||
coff_swap_aouthdr_out (abfd, (PTR) & internal_a, (PTR) & buff);
|
||
if (bfd_write ((PTR) & buff, 1, AOUTSZ, abfd) != AOUTSZ)
|
||
return false;
|
||
}
|
||
return true;
|
||
}
|
||
|
||
static boolean
|
||
coff_set_section_contents (abfd, section, location, offset, count)
|
||
bfd * abfd;
|
||
sec_ptr section;
|
||
PTR location;
|
||
file_ptr offset;
|
||
bfd_size_type count;
|
||
{
|
||
if (abfd->output_has_begun == false) /* set by bfd.c handler */
|
||
coff_compute_section_file_positions (abfd);
|
||
|
||
#ifdef _LIB
|
||
/* If this is a .lib section, bump the vma address so that it
|
||
winds up being the number of .lib sections output. This is
|
||
right for SVR3.2. Shared libraries should probably get more
|
||
generic support. Ian Taylor <ian@cygnus.com>. */
|
||
if (strcmp (section->name, _LIB) == 0)
|
||
++section->lma;
|
||
#endif
|
||
|
||
/* Don't write out bss sections - one way to do this is to
|
||
see if the filepos has not been set. */
|
||
if (section->filepos == 0)
|
||
return true;
|
||
|
||
if (bfd_seek (abfd, (file_ptr) (section->filepos + offset), SEEK_SET) != 0)
|
||
return false;
|
||
|
||
if (count != 0)
|
||
{
|
||
return (bfd_write (location, 1, count, abfd) == count) ? true : false;
|
||
}
|
||
return true;
|
||
}
|
||
#if 0
|
||
static boolean
|
||
coff_close_and_cleanup (abfd)
|
||
bfd *abfd;
|
||
{
|
||
if (!bfd_read_p (abfd))
|
||
switch (abfd->format)
|
||
{
|
||
case bfd_archive:
|
||
if (!_bfd_write_archive_contents (abfd))
|
||
return false;
|
||
break;
|
||
case bfd_object:
|
||
if (!coff_write_object_contents (abfd))
|
||
return false;
|
||
break;
|
||
default:
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return false;
|
||
}
|
||
|
||
/* We depend on bfd_close to free all the memory on the obstack. */
|
||
/* FIXME if bfd_release is not using obstacks! */
|
||
return true;
|
||
}
|
||
|
||
#endif
|
||
|
||
static PTR
|
||
buy_and_read (abfd, where, seek_direction, size)
|
||
bfd *abfd;
|
||
file_ptr where;
|
||
int seek_direction;
|
||
size_t size;
|
||
{
|
||
PTR area = (PTR) bfd_alloc (abfd, size);
|
||
if (!area)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return (NULL);
|
||
}
|
||
if (bfd_seek (abfd, where, seek_direction) != 0
|
||
|| bfd_read (area, 1, size, abfd) != size)
|
||
return (NULL);
|
||
return (area);
|
||
} /* buy_and_read() */
|
||
|
||
/*
|
||
SUBSUBSECTION
|
||
Reading linenumbers
|
||
|
||
Creating the linenumber table is done by reading in the entire
|
||
coff linenumber table, and creating another table for internal use.
|
||
|
||
A coff linenumber table is structured so that each function
|
||
is marked as having a line number of 0. Each line within the
|
||
function is an offset from the first line in the function. The
|
||
base of the line number information for the table is stored in
|
||
the symbol associated with the function.
|
||
|
||
The information is copied from the external to the internal
|
||
table, and each symbol which marks a function is marked by
|
||
pointing its...
|
||
|
||
How does this work ?
|
||
|
||
*/
|
||
|
||
static boolean
|
||
coff_slurp_line_table (abfd, asect)
|
||
bfd *abfd;
|
||
asection *asect;
|
||
{
|
||
LINENO *native_lineno;
|
||
alent *lineno_cache;
|
||
|
||
BFD_ASSERT (asect->lineno == (alent *) NULL);
|
||
|
||
native_lineno = (LINENO *) buy_and_read (abfd,
|
||
asect->line_filepos,
|
||
SEEK_SET,
|
||
(size_t) (LINESZ *
|
||
asect->lineno_count));
|
||
lineno_cache =
|
||
(alent *) bfd_alloc (abfd, (size_t) ((asect->lineno_count + 1) * sizeof (alent)));
|
||
if (lineno_cache == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return false;
|
||
}
|
||
else
|
||
{
|
||
unsigned int counter = 0;
|
||
alent *cache_ptr = lineno_cache;
|
||
LINENO *src = native_lineno;
|
||
|
||
while (counter < asect->lineno_count)
|
||
{
|
||
struct internal_lineno dst;
|
||
coff_swap_lineno_in (abfd, src, &dst);
|
||
cache_ptr->line_number = dst.l_lnno;
|
||
|
||
if (cache_ptr->line_number == 0)
|
||
{
|
||
coff_symbol_type *sym =
|
||
(coff_symbol_type *) (dst.l_addr.l_symndx
|
||
+ obj_raw_syments (abfd))->u.syment._n._n_n._n_zeroes;
|
||
cache_ptr->u.sym = (asymbol *) sym;
|
||
sym->lineno = cache_ptr;
|
||
}
|
||
else
|
||
{
|
||
cache_ptr->u.offset = dst.l_addr.l_paddr
|
||
- bfd_section_vma (abfd, asect);
|
||
} /* If no linenumber expect a symbol index */
|
||
|
||
cache_ptr++;
|
||
src++;
|
||
counter++;
|
||
}
|
||
cache_ptr->line_number = 0;
|
||
|
||
}
|
||
asect->lineno = lineno_cache;
|
||
/* FIXME, free native_lineno here, or use alloca or something. */
|
||
return true;
|
||
}
|
||
|
||
static boolean
|
||
coff_slurp_symbol_table (abfd)
|
||
bfd * abfd;
|
||
{
|
||
combined_entry_type *native_symbols;
|
||
coff_symbol_type *cached_area;
|
||
unsigned int *table_ptr;
|
||
|
||
unsigned int number_of_symbols = 0;
|
||
if (obj_symbols (abfd))
|
||
return true;
|
||
if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0)
|
||
return false;
|
||
|
||
/* Read in the symbol table */
|
||
if ((native_symbols = coff_get_normalized_symtab (abfd)) == NULL)
|
||
{
|
||
return (false);
|
||
} /* on error */
|
||
|
||
/* Allocate enough room for all the symbols in cached form */
|
||
cached_area =
|
||
(coff_symbol_type *)
|
||
bfd_alloc (abfd, (size_t) (bfd_get_symcount (abfd) * sizeof (coff_symbol_type)));
|
||
|
||
if (cached_area == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return false;
|
||
} /* on error */
|
||
table_ptr =
|
||
(unsigned int *)
|
||
bfd_alloc (abfd, (size_t) (bfd_get_symcount (abfd) * sizeof (unsigned int)));
|
||
|
||
if (table_ptr == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return false;
|
||
}
|
||
else
|
||
{
|
||
coff_symbol_type *dst = cached_area;
|
||
unsigned int last_native_index = bfd_get_symcount (abfd);
|
||
unsigned int this_index = 0;
|
||
while (this_index < last_native_index)
|
||
{
|
||
combined_entry_type *src = native_symbols + this_index;
|
||
table_ptr[this_index] = number_of_symbols;
|
||
dst->symbol.the_bfd = abfd;
|
||
|
||
dst->symbol.name = (char *) (src->u.syment._n._n_n._n_offset);
|
||
/* We use the native name field to point to the cached field. */
|
||
src->u.syment._n._n_n._n_zeroes = (long) dst;
|
||
dst->symbol.section = coff_section_from_bfd_index (abfd,
|
||
src->u.syment.n_scnum);
|
||
dst->symbol.flags = 0;
|
||
dst->done_lineno = false;
|
||
|
||
switch (src->u.syment.n_sclass)
|
||
{
|
||
#ifdef I960
|
||
case C_LEAFEXT:
|
||
#if 0
|
||
dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
|
||
dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
|
||
dst->symbol.flags |= BSF_NOT_AT_END;
|
||
#endif
|
||
/* Fall through to next case */
|
||
|
||
#endif
|
||
|
||
case C_EXT:
|
||
#ifdef RS6000COFF_C
|
||
case C_HIDEXT:
|
||
#endif
|
||
if ((src->u.syment.n_scnum) == 0)
|
||
{
|
||
if ((src->u.syment.n_value) == 0)
|
||
{
|
||
dst->symbol.section = bfd_und_section_ptr;
|
||
dst->symbol.value = 0;
|
||
}
|
||
else
|
||
{
|
||
dst->symbol.section = bfd_com_section_ptr;
|
||
dst->symbol.value = (src->u.syment.n_value);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/*
|
||
Base the value as an index from the base of the
|
||
section
|
||
*/
|
||
|
||
dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
|
||
dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
|
||
|
||
if (ISFCN ((src->u.syment.n_type)))
|
||
{
|
||
/*
|
||
A function ext does not go at the end of a file
|
||
*/
|
||
dst->symbol.flags |= BSF_NOT_AT_END;
|
||
}
|
||
}
|
||
|
||
#ifdef RS6000COFF_C
|
||
/* If this symbol has a csect aux of type LD, the scnlen field
|
||
is actually the index of the containing csect symbol. We
|
||
need to pointerize it. */
|
||
if (src->u.syment.n_numaux > 0)
|
||
{
|
||
combined_entry_type *aux;
|
||
|
||
aux = src + src->u.syment.n_numaux - 1;
|
||
if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) == XTY_LD)
|
||
{
|
||
aux->u.auxent.x_csect.x_scnlen.p =
|
||
native_symbols + aux->u.auxent.x_csect.x_scnlen.l;
|
||
aux->fix_scnlen = 1;
|
||
}
|
||
}
|
||
#endif
|
||
|
||
break;
|
||
|
||
case C_STAT: /* static */
|
||
#ifdef I960
|
||
case C_LEAFSTAT: /* static leaf procedure */
|
||
#endif
|
||
case C_LABEL: /* label */
|
||
if (src->u.syment.n_scnum == -2)
|
||
dst->symbol.flags = BSF_DEBUGGING;
|
||
else
|
||
dst->symbol.flags = BSF_LOCAL;
|
||
/*
|
||
Base the value as an index from the base of the section, if
|
||
there is one
|
||
*/
|
||
if (dst->symbol.section)
|
||
dst->symbol.value = (src->u.syment.n_value) -
|
||
dst->symbol.section->vma;
|
||
else
|
||
dst->symbol.value = (src->u.syment.n_value);
|
||
break;
|
||
|
||
case C_MOS: /* member of structure */
|
||
case C_EOS: /* end of structure */
|
||
#ifdef NOTDEF /* C_AUTOARG has the same value */
|
||
#ifdef C_GLBLREG
|
||
case C_GLBLREG: /* A29k-specific storage class */
|
||
#endif
|
||
#endif
|
||
case C_REGPARM: /* register parameter */
|
||
case C_REG: /* register variable */
|
||
#ifdef C_AUTOARG
|
||
case C_AUTOARG: /* 960-specific storage class */
|
||
#endif
|
||
case C_TPDEF: /* type definition */
|
||
case C_ARG:
|
||
case C_AUTO: /* automatic variable */
|
||
case C_FIELD: /* bit field */
|
||
case C_ENTAG: /* enumeration tag */
|
||
case C_MOE: /* member of enumeration */
|
||
case C_MOU: /* member of union */
|
||
case C_UNTAG: /* union tag */
|
||
dst->symbol.flags = BSF_DEBUGGING;
|
||
dst->symbol.value = (src->u.syment.n_value);
|
||
break;
|
||
|
||
case C_FILE: /* file name */
|
||
case C_STRTAG: /* structure tag */
|
||
#ifdef RS6000COFF_C
|
||
case C_BINCL: /* beginning of include file */
|
||
case C_EINCL: /* ending of include file */
|
||
case C_GSYM:
|
||
case C_LSYM:
|
||
case C_PSYM:
|
||
case C_RSYM:
|
||
case C_RPSYM:
|
||
case C_STSYM:
|
||
case C_DECL:
|
||
case C_ENTRY:
|
||
case C_FUN:
|
||
case C_ESTAT:
|
||
#endif
|
||
dst->symbol.flags = BSF_DEBUGGING;
|
||
dst->symbol.value = (src->u.syment.n_value);
|
||
break;
|
||
|
||
#ifdef RS6000COFF_C
|
||
case C_BSTAT:
|
||
dst->symbol.flags = BSF_DEBUGGING;
|
||
dst->symbol.value = src->u.syment.n_value;
|
||
|
||
/* The value is actually a symbol index. Save a pointer to
|
||
the symbol instead of the index. FIXME: This should use a
|
||
union. */
|
||
src->u.syment.n_value =
|
||
(long) (native_symbols + src->u.syment.n_value);
|
||
src->fix_value = 1;
|
||
break;
|
||
#endif
|
||
|
||
case C_BLOCK: /* ".bb" or ".eb" */
|
||
case C_FCN: /* ".bf" or ".ef" */
|
||
case C_EFCN: /* physical end of function */
|
||
dst->symbol.flags = BSF_LOCAL;
|
||
/*
|
||
Base the value as an index from the base of the section
|
||
*/
|
||
dst->symbol.value = (src->u.syment.n_value) - dst->symbol.section->vma;
|
||
break;
|
||
|
||
case C_NULL:
|
||
case C_EXTDEF: /* external definition */
|
||
case C_ULABEL: /* undefined label */
|
||
case C_USTATIC: /* undefined static */
|
||
case C_LINE: /* line # reformatted as symbol table entry */
|
||
case C_ALIAS: /* duplicate tag */
|
||
case C_HIDDEN: /* ext symbol in dmert public lib */
|
||
default:
|
||
|
||
fprintf (stderr, "Unrecognized storage class %d (assuming debugging)\n for %s symbol `%s'\n",
|
||
src->u.syment.n_sclass, dst->symbol.section->name,
|
||
dst->symbol.name);
|
||
/* abort();*/
|
||
dst->symbol.flags = BSF_DEBUGGING;
|
||
dst->symbol.value = (src->u.syment.n_value);
|
||
break;
|
||
}
|
||
|
||
/* BFD_ASSERT(dst->symbol.flags != 0);*/
|
||
|
||
dst->native = src;
|
||
|
||
dst->symbol.udata = 0;
|
||
dst->lineno = (alent *) NULL;
|
||
this_index += (src->u.syment.n_numaux) + 1;
|
||
dst++;
|
||
number_of_symbols++;
|
||
} /* walk the native symtab */
|
||
} /* bfdize the native symtab */
|
||
|
||
obj_symbols (abfd) = cached_area;
|
||
obj_raw_syments (abfd) = native_symbols;
|
||
|
||
obj_conv_table_size (abfd) = bfd_get_symcount (abfd);
|
||
bfd_get_symcount (abfd) = number_of_symbols;
|
||
obj_convert (abfd) = table_ptr;
|
||
/* Slurp the line tables for each section too */
|
||
{
|
||
asection *p;
|
||
p = abfd->sections;
|
||
while (p)
|
||
{
|
||
coff_slurp_line_table (abfd, p);
|
||
p = p->next;
|
||
}
|
||
}
|
||
return true;
|
||
} /* coff_slurp_symbol_table() */
|
||
|
||
/*
|
||
SUBSUBSECTION
|
||
Reading relocations
|
||
|
||
Coff relocations are easily transformed into the internal BFD form
|
||
(@code{arelent}).
|
||
|
||
Reading a coff relocation table is done in the following stages:
|
||
|
||
o Read the entire coff relocation table into memory.
|
||
|
||
o Process each relocation in turn; first swap it from the
|
||
external to the internal form.
|
||
|
||
o Turn the symbol referenced in the relocation's symbol index
|
||
into a pointer into the canonical symbol table.
|
||
This table is the same as the one returned by a call to
|
||
@code{bfd_canonicalize_symtab}. The back end will call that
|
||
routine and save the result if a canonicalization hasn't been done.
|
||
|
||
o The reloc index is turned into a pointer to a howto
|
||
structure, in a back end specific way. For instance, the 386
|
||
and 960 use the @code{r_type} to directly produce an index
|
||
into a howto table vector; the 88k subtracts a number from the
|
||
@code{r_type} field and creates an addend field.
|
||
|
||
|
||
*/
|
||
|
||
#ifndef CALC_ADDEND
|
||
#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
|
||
{ \
|
||
coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
|
||
if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
|
||
coffsym = (obj_symbols (abfd) \
|
||
+ (cache_ptr->sym_ptr_ptr - symbols)); \
|
||
else if (ptr) \
|
||
coffsym = coff_symbol_from (abfd, ptr); \
|
||
if (coffsym != (coff_symbol_type *) NULL \
|
||
&& coffsym->native->u.syment.n_scnum == 0) \
|
||
cache_ptr->addend = 0; \
|
||
else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
|
||
&& ptr->section != (asection *) NULL) \
|
||
cache_ptr->addend = - (ptr->section->vma + ptr->value); \
|
||
else \
|
||
cache_ptr->addend = 0; \
|
||
}
|
||
#endif
|
||
|
||
static boolean
|
||
coff_slurp_reloc_table (abfd, asect, symbols)
|
||
bfd * abfd;
|
||
sec_ptr asect;
|
||
asymbol ** symbols;
|
||
{
|
||
RELOC *native_relocs;
|
||
arelent *reloc_cache;
|
||
arelent *cache_ptr;
|
||
|
||
unsigned int idx;
|
||
|
||
if (asect->relocation)
|
||
return true;
|
||
if (asect->reloc_count == 0)
|
||
return true;
|
||
if (asect->flags & SEC_CONSTRUCTOR)
|
||
return true;
|
||
if (!coff_slurp_symbol_table (abfd))
|
||
return false;
|
||
native_relocs =
|
||
(RELOC *) buy_and_read (abfd,
|
||
asect->rel_filepos,
|
||
SEEK_SET,
|
||
(size_t) (RELSZ *
|
||
asect->reloc_count));
|
||
reloc_cache = (arelent *)
|
||
bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent)));
|
||
|
||
if (reloc_cache == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return false;
|
||
}
|
||
|
||
|
||
for (idx = 0; idx < asect->reloc_count; idx++)
|
||
{
|
||
#ifdef RELOC_PROCESSING
|
||
struct internal_reloc dst;
|
||
struct external_reloc *src;
|
||
|
||
cache_ptr = reloc_cache + idx;
|
||
src = native_relocs + idx;
|
||
bfd_swap_reloc_in (abfd, src, &dst);
|
||
|
||
RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect);
|
||
#else
|
||
struct internal_reloc dst;
|
||
asymbol *ptr;
|
||
struct external_reloc *src;
|
||
|
||
cache_ptr = reloc_cache + idx;
|
||
src = native_relocs + idx;
|
||
|
||
bfd_swap_reloc_in (abfd, src, &dst);
|
||
|
||
|
||
cache_ptr->address = dst.r_vaddr;
|
||
|
||
if (dst.r_symndx != -1)
|
||
{
|
||
/* @@ Should never be greater than count of symbols! */
|
||
if (dst.r_symndx >= obj_conv_table_size (abfd))
|
||
abort ();
|
||
cache_ptr->sym_ptr_ptr = symbols + obj_convert (abfd)[dst.r_symndx];
|
||
ptr = *(cache_ptr->sym_ptr_ptr);
|
||
}
|
||
else
|
||
{
|
||
cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
|
||
ptr = 0;
|
||
}
|
||
|
||
/* The symbols definitions that we have read in have been
|
||
relocated as if their sections started at 0. But the offsets
|
||
refering to the symbols in the raw data have not been
|
||
modified, so we have to have a negative addend to compensate.
|
||
|
||
Note that symbols which used to be common must be left alone */
|
||
|
||
/* Calculate any reloc addend by looking at the symbol */
|
||
CALC_ADDEND (abfd, ptr, dst, cache_ptr);
|
||
|
||
cache_ptr->address -= asect->vma;
|
||
/* !! cache_ptr->section = (asection *) NULL;*/
|
||
|
||
/* Fill in the cache_ptr->howto field from dst.r_type */
|
||
RTYPE2HOWTO (cache_ptr, &dst);
|
||
#endif
|
||
|
||
}
|
||
|
||
asect->relocation = reloc_cache;
|
||
return true;
|
||
}
|
||
|
||
|
||
/* This is stupid. This function should be a boolean predicate. */
|
||
static long
|
||
coff_canonicalize_reloc (abfd, section, relptr, symbols)
|
||
bfd * abfd;
|
||
sec_ptr section;
|
||
arelent ** relptr;
|
||
asymbol ** symbols;
|
||
{
|
||
arelent *tblptr = section->relocation;
|
||
unsigned int count = 0;
|
||
|
||
|
||
if (section->flags & SEC_CONSTRUCTOR)
|
||
{
|
||
/* this section has relocs made up by us, they are not in the
|
||
file, so take them out of their chain and place them into
|
||
the data area provided */
|
||
arelent_chain *chain = section->constructor_chain;
|
||
for (count = 0; count < section->reloc_count; count++)
|
||
{
|
||
*relptr++ = &chain->relent;
|
||
chain = chain->next;
|
||
}
|
||
|
||
}
|
||
else
|
||
{
|
||
if (! coff_slurp_reloc_table (abfd, section, symbols))
|
||
return -1;
|
||
|
||
tblptr = section->relocation;
|
||
|
||
for (; count++ < section->reloc_count;)
|
||
*relptr++ = tblptr++;
|
||
|
||
|
||
}
|
||
*relptr = 0;
|
||
return section->reloc_count;
|
||
}
|
||
|
||
#ifdef GNU960
|
||
file_ptr
|
||
coff_sym_filepos (abfd)
|
||
bfd *abfd;
|
||
{
|
||
return obj_sym_filepos (abfd);
|
||
}
|
||
#endif
|
||
|
||
#ifndef coff_reloc16_estimate
|
||
#define coff_reloc16_estimate dummy_reloc16_estimate
|
||
|
||
static int
|
||
dummy_reloc16_estimate (abfd, input_section, reloc, shrink, link_info)
|
||
bfd *abfd;
|
||
asection *input_section;
|
||
arelent *reloc;
|
||
unsigned int shrink;
|
||
struct bfd_link_info *link_info;
|
||
{
|
||
abort ();
|
||
}
|
||
|
||
#endif
|
||
|
||
#ifndef coff_reloc16_extra_cases
|
||
#define coff_reloc16_extra_cases dummy_reloc16_extra_cases
|
||
/* This works even if abort is not declared in any header file. */
|
||
static void
|
||
dummy_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr,
|
||
dst_ptr)
|
||
bfd *abfd;
|
||
struct bfd_link_info *link_info;
|
||
struct bfd_link_order *link_order;
|
||
arelent *reloc;
|
||
bfd_byte *data;
|
||
unsigned int *src_ptr;
|
||
unsigned int *dst_ptr;
|
||
{
|
||
fprintf (stderr, "%s\n", reloc->howto->name);
|
||
abort ();
|
||
}
|
||
#endif
|
||
|
||
static CONST bfd_coff_backend_data bfd_coff_std_swap_table =
|
||
{
|
||
coff_swap_aux_in, coff_swap_sym_in, coff_swap_lineno_in,
|
||
coff_swap_aux_out, coff_swap_sym_out,
|
||
coff_swap_lineno_out, coff_swap_reloc_out,
|
||
coff_swap_filehdr_out, coff_swap_aouthdr_out,
|
||
coff_swap_scnhdr_out,
|
||
FILHSZ, AOUTSZ, SCNHSZ, SYMESZ, AUXESZ, LINESZ,
|
||
#ifdef COFF_LONG_FILENAMES
|
||
true,
|
||
#else
|
||
false,
|
||
#endif
|
||
coff_swap_filehdr_in, coff_swap_aouthdr_in, coff_swap_scnhdr_in,
|
||
coff_bad_format_hook, coff_set_arch_mach_hook, coff_mkobject_hook,
|
||
styp_to_sec_flags, coff_make_section_hook, coff_set_alignment_hook,
|
||
coff_slurp_symbol_table, symname_in_debug_hook,
|
||
coff_reloc16_extra_cases, coff_reloc16_estimate
|
||
};
|
||
|
||
#define coff_close_and_cleanup _bfd_generic_close_and_cleanup
|
||
#define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
|
||
#define coff_get_section_contents _bfd_generic_get_section_contents
|
||
|
||
#define coff_bfd_copy_private_section_data \
|
||
_bfd_generic_bfd_copy_private_section_data
|
||
#define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
|
||
|
||
#ifndef coff_bfd_is_local_label
|
||
#define coff_bfd_is_local_label bfd_generic_is_local_label
|
||
#endif
|
||
|
||
/* The reloc lookup routine must be supplied by each individual COFF
|
||
backend. */
|
||
#ifndef coff_bfd_reloc_type_lookup
|
||
#define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
|
||
#endif
|
||
|
||
#define coff_bfd_get_relocated_section_contents \
|
||
bfd_generic_get_relocated_section_contents
|
||
#define coff_bfd_relax_section bfd_generic_relax_section
|
||
#define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
|
||
#define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
|
||
#define coff_bfd_final_link _bfd_generic_final_link
|