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[/] [openrisc/] [trunk/] [gnu-old/] [binutils-2.18.50/] [bfd/] [coffcode.h] - Rev 816
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/* Support for the generic parts of most COFF variants, for BFD. Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. Written by Cygnus Support. This file is part of BFD, the Binary File Descriptor library. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ /* Most of this hacked by Steve Chamberlain, sac@cygnus.com. */ /* SECTION coff backends BFD supports a number of different flavours of coff format. The major differences between formats are the sizes and alignments of fields in structures on disk, and the occasional extra field. Coff in all its varieties is implemented with a few common files and a number of implementation specific files. For example, The 88k bcs coff format is implemented in the file @file{coff-m88k.c}. This file @code{#include}s @file{coff/m88k.h} which defines the external structure of the coff format for the 88k, and @file{coff/internal.h} which defines the internal structure. @file{coff-m88k.c} also defines the relocations used by the 88k format @xref{Relocations}. The Intel i960 processor version of coff is implemented in @file{coff-i960.c}. This file has the same structure as @file{coff-m88k.c}, except that it includes @file{coff/i960.h} rather than @file{coff-m88k.h}. SUBSECTION Porting to a new version of coff The recommended method is to select from the existing implementations the version of coff which is most like the one you want to use. For example, we'll say that i386 coff is the one you select, and that your coff flavour is called foo. Copy @file{i386coff.c} to @file{foocoff.c}, copy @file{../include/coff/i386.h} to @file{../include/coff/foo.h}, and add the lines to @file{targets.c} and @file{Makefile.in} so that your new back end is used. Alter the shapes of the structures in @file{../include/coff/foo.h} so that they match what you need. You will probably also have to add @code{#ifdef}s to the code in @file{coff/internal.h} and @file{coffcode.h} if your version of coff is too wild. You can verify that your new BFD backend works quite simply by building @file{objdump} from the @file{binutils} directory, and making sure that its version of what's going on and your host system's idea (assuming it has the pretty standard coff dump utility, usually called @code{att-dump} or just @code{dump}) are the same. Then clean up your code, and send what you've done to Cygnus. Then your stuff will be in the next release, and you won't have to keep integrating it. SUBSECTION How the coff backend works SUBSUBSECTION File layout The Coff backend is split into generic routines that are applicable to any Coff target and routines that are specific to a particular target. The target-specific routines are further split into ones which are basically the same for all Coff targets except that they use the external symbol format or use different values for certain constants. The generic routines are in @file{coffgen.c}. These routines work for any Coff target. They use some hooks into the target specific code; the hooks are in a @code{bfd_coff_backend_data} structure, one of which exists for each target. The essentially similar target-specific routines are in @file{coffcode.h}. This header file includes executable C code. The various Coff targets first include the appropriate Coff header file, make any special defines that are needed, and then include @file{coffcode.h}. Some of the Coff targets then also have additional routines in the target source file itself. For example, @file{coff-i960.c} includes @file{coff/internal.h} and @file{coff/i960.h}. It then defines a few constants, such as @code{I960}, and includes @file{coffcode.h}. Since the i960 has complex relocation types, @file{coff-i960.c} also includes some code to manipulate the i960 relocs. This code is not in @file{coffcode.h} because it would not be used by any other target. SUBSUBSECTION Bit twiddling Each flavour of coff supported in BFD has its own header file describing the external layout of the structures. There is also an internal description of the coff layout, in @file{coff/internal.h}. A major function of the coff backend is swapping the bytes and twiddling the bits to translate the external form of the structures into the normal internal form. This is all performed in the @code{bfd_swap}_@i{thing}_@i{direction} routines. Some elements are different sizes between different versions of coff; it is the duty of the coff version specific include file to override the definitions of various packing routines in @file{coffcode.h}. E.g., the size of line number entry in coff is sometimes 16 bits, and sometimes 32 bits. @code{#define}ing @code{PUT_LNSZ_LNNO} and @code{GET_LNSZ_LNNO} will select the correct one. No doubt, some day someone will find a version of coff which has a varying field size not catered to at the moment. To port BFD, that person will have to add more @code{#defines}. Three of the bit twiddling routines are exported to @code{gdb}; @code{coff_swap_aux_in}, @code{coff_swap_sym_in} and @code{coff_swap_lineno_in}. @code{GDB} reads the symbol table on its own, but uses BFD to fix things up. More of the bit twiddlers are exported for @code{gas}; @code{coff_swap_aux_out}, @code{coff_swap_sym_out}, @code{coff_swap_lineno_out}, @code{coff_swap_reloc_out}, @code{coff_swap_filehdr_out}, @code{coff_swap_aouthdr_out}, @code{coff_swap_scnhdr_out}. @code{Gas} currently keeps track of all the symbol table and reloc drudgery itself, thereby saving the internal BFD overhead, but uses BFD to swap things on the way out, making cross ports much safer. Doing so also allows BFD (and thus the linker) to use the same header files as @code{gas}, which makes one avenue to disaster disappear. SUBSUBSECTION Symbol reading The simple canonical form for symbols used by BFD is not rich enough to keep all the information available in a coff symbol table. The back end gets around this problem by keeping the original symbol table around, "behind the scenes". When a symbol table is requested (through a call to @code{bfd_canonicalize_symtab}), a request gets through to @code{coff_get_normalized_symtab}. This reads the symbol table from the coff file and swaps all the structures inside into the internal form. It also fixes up all the pointers in the table (represented in the file by offsets from the first symbol in the table) into physical pointers to elements in the new internal table. This involves some work since the meanings of fields change depending upon context: a field that is a pointer to another structure in the symbol table at one moment may be the size in bytes of a structure at the next. Another pass is made over the table. All symbols which mark file names (<<C_FILE>> symbols) are modified so that the internal string points to the value in the auxent (the real filename) rather than the normal text associated with the symbol (@code{".file"}). At this time the symbol names are moved around. Coff stores all symbols less than nine characters long physically within the symbol table; longer strings are kept at the end of the file in the string table. This pass moves all strings into memory and replaces them with pointers to the strings. The symbol table is massaged once again, this time to create the canonical table used by the BFD application. Each symbol is inspected in turn, and a decision made (using the @code{sclass} field) about the various flags to set in the @code{asymbol}. @xref{Symbols}. The generated canonical table shares strings with the hidden internal symbol table. Any linenumbers are read from the coff file too, and attached to the symbols which own the functions the linenumbers belong to. SUBSUBSECTION Symbol writing Writing a symbol to a coff file which didn't come from a coff file will lose any debugging information. The @code{asymbol} structure remembers the BFD from which the symbol was taken, and on output the back end makes sure that the same destination target as source target is present. When the symbols have come from a coff file then all the debugging information is preserved. Symbol tables are provided for writing to the back end in a vector of pointers to pointers. This allows applications like the linker to accumulate and output large symbol tables without having to do too much byte copying. This function runs through the provided symbol table and patches each symbol marked as a file place holder (@code{C_FILE}) to point to the next file place holder in the list. It also marks each @code{offset} field in the list with the offset from the first symbol of the current symbol. Another function of this procedure is to turn the canonical value form of BFD into the form used by coff. Internally, BFD expects symbol values to be offsets from a section base; so a symbol physically at 0x120, but in a section starting at 0x100, would have the value 0x20. Coff expects symbols to contain their final value, so symbols have their values changed at this point to reflect their sum with their owning section. This transformation uses the <<output_section>> field of the @code{asymbol}'s @code{asection} @xref{Sections}. o <<coff_mangle_symbols>> This routine runs though the provided symbol table and uses the offsets generated by the previous pass and the pointers generated when the symbol table was read in to create the structured hierarchy required by coff. It changes each pointer to a symbol into the index into the symbol table of the asymbol. o <<coff_write_symbols>> This routine runs through the symbol table and patches up the symbols from their internal form into the coff way, calls the bit twiddlers, and writes out the table to the file. */ /* INTERNAL_DEFINITION coff_symbol_type DESCRIPTION The hidden information for an <<asymbol>> is described in a <<combined_entry_type>>: CODE_FRAGMENT . .typedef struct coff_ptr_struct .{ . {* Remembers the offset from the first symbol in the file for . this symbol. Generated by coff_renumber_symbols. *} . unsigned int offset; . . {* Should the value of this symbol be renumbered. Used for . XCOFF C_BSTAT symbols. Set by coff_slurp_symbol_table. *} . unsigned int fix_value : 1; . . {* Should the tag field of this symbol be renumbered. . Created by coff_pointerize_aux. *} . unsigned int fix_tag : 1; . . {* Should the endidx field of this symbol be renumbered. . Created by coff_pointerize_aux. *} . unsigned int fix_end : 1; . . {* Should the x_csect.x_scnlen field be renumbered. . Created by coff_pointerize_aux. *} . unsigned int fix_scnlen : 1; . . {* Fix up an XCOFF C_BINCL/C_EINCL symbol. The value is the . index into the line number entries. Set by coff_slurp_symbol_table. *} . unsigned int fix_line : 1; . . {* The container for the symbol structure as read and translated . from the file. *} . union . { . union internal_auxent auxent; . struct internal_syment syment; . } u; .} combined_entry_type; . . .{* Each canonical asymbol really looks like this: *} . .typedef struct coff_symbol_struct .{ . {* The actual symbol which the rest of BFD works with *} . asymbol symbol; . . {* A pointer to the hidden information for this symbol *} . combined_entry_type *native; . . {* A pointer to the linenumber information for this symbol *} . struct lineno_cache_entry *lineno; . . {* Have the line numbers been relocated yet ? *} . bfd_boolean done_lineno; .} coff_symbol_type; */ #ifdef COFF_WITH_PE #include "peicode.h" #else #include "coffswap.h" #endif #define STRING_SIZE_SIZE 4 #define DOT_DEBUG ".debug" #define GNU_LINKONCE_WI ".gnu.linkonce.wi." static long sec_to_styp_flags (const char *, flagword); static bfd_boolean styp_to_sec_flags (bfd *, void *, const char *, asection *, flagword *); static bfd_boolean coff_bad_format_hook (bfd *, void *); static void coff_set_custom_section_alignment (bfd *, asection *, const struct coff_section_alignment_entry *, const unsigned int); static bfd_boolean coff_new_section_hook (bfd *, asection *); static bfd_boolean coff_set_arch_mach_hook (bfd *, void *); static bfd_boolean coff_write_relocs (bfd *, int); static bfd_boolean coff_set_flags (bfd *, unsigned int *, unsigned short *); static bfd_boolean coff_set_arch_mach (bfd *, enum bfd_architecture, unsigned long) ATTRIBUTE_UNUSED; static bfd_boolean coff_compute_section_file_positions (bfd *); static bfd_boolean coff_write_object_contents (bfd *) ATTRIBUTE_UNUSED; static bfd_boolean coff_set_section_contents (bfd *, asection *, const void *, file_ptr, bfd_size_type); static void * buy_and_read (bfd *, file_ptr, bfd_size_type); static bfd_boolean coff_slurp_line_table (bfd *, asection *); static bfd_boolean coff_slurp_symbol_table (bfd *); static enum coff_symbol_classification coff_classify_symbol (bfd *, struct internal_syment *); static bfd_boolean coff_slurp_reloc_table (bfd *, asection *, asymbol **); static long coff_canonicalize_reloc (bfd *, asection *, arelent **, asymbol **); #ifndef coff_mkobject_hook static void * coff_mkobject_hook (bfd *, void *, void *); #endif #ifdef COFF_WITH_PE static flagword handle_COMDAT (bfd *, flagword, void *, const char *, asection *); #endif #ifdef COFF_IMAGE_WITH_PE static bfd_boolean coff_read_word (bfd *, unsigned int *); static unsigned int coff_compute_checksum (bfd *); static bfd_boolean coff_apply_checksum (bfd *); #endif #ifdef TICOFF static bfd_boolean ticoff0_bad_format_hook (bfd *, void * ); static bfd_boolean ticoff1_bad_format_hook (bfd *, void * ); #endif /* void warning(); */ /* Return a word with STYP_* (scnhdr.s_flags) flags set to represent the incoming SEC_* flags. The inverse of this function is styp_to_sec_flags(). NOTE: If you add to/change this routine, you should probably mirror the changes in styp_to_sec_flags(). */ #ifndef COFF_WITH_PE /* Macros for setting debugging flags. */ #ifdef STYP_DEBUG #define STYP_XCOFF_DEBUG STYP_DEBUG #else #define STYP_XCOFF_DEBUG STYP_INFO #endif #ifdef COFF_ALIGN_IN_S_FLAGS #define STYP_DEBUG_INFO STYP_DSECT #else #define STYP_DEBUG_INFO STYP_INFO #endif static long sec_to_styp_flags (const char *sec_name, flagword sec_flags) { long styp_flags = 0; if (!strcmp (sec_name, _TEXT)) { styp_flags = STYP_TEXT; } else if (!strcmp (sec_name, _DATA)) { styp_flags = STYP_DATA; } else if (!strcmp (sec_name, _BSS)) { styp_flags = STYP_BSS; #ifdef _COMMENT } else if (!strcmp (sec_name, _COMMENT)) { styp_flags = STYP_INFO; #endif /* _COMMENT */ #ifdef _LIB } else if (!strcmp (sec_name, _LIB)) { styp_flags = STYP_LIB; #endif /* _LIB */ #ifdef _LIT } else if (!strcmp (sec_name, _LIT)) { styp_flags = STYP_LIT; #endif /* _LIT */ } else if (CONST_STRNEQ (sec_name, DOT_DEBUG)) { /* Handle the XCOFF debug section and DWARF2 debug sections. */ if (!sec_name[6]) styp_flags = STYP_XCOFF_DEBUG; else styp_flags = STYP_DEBUG_INFO; } else if (CONST_STRNEQ (sec_name, ".stab")) { styp_flags = STYP_DEBUG_INFO; } #ifdef COFF_LONG_SECTION_NAMES else if (CONST_STRNEQ (sec_name, GNU_LINKONCE_WI)) { styp_flags = STYP_DEBUG_INFO; } #endif #ifdef RS6000COFF_C else if (!strcmp (sec_name, _PAD)) { styp_flags = STYP_PAD; } else if (!strcmp (sec_name, _LOADER)) { styp_flags = STYP_LOADER; } else if (!strcmp (sec_name, _EXCEPT)) { styp_flags = STYP_EXCEPT; } else if (!strcmp (sec_name, _TYPCHK)) { styp_flags = STYP_TYPCHK; } #endif /* Try and figure out what it should be */ else if (sec_flags & SEC_CODE) { styp_flags = STYP_TEXT; } else if (sec_flags & SEC_DATA) { styp_flags = STYP_DATA; } else if (sec_flags & SEC_READONLY) { #ifdef STYP_LIT /* 29k readonly text/data section */ styp_flags = STYP_LIT; #else styp_flags = STYP_TEXT; #endif /* STYP_LIT */ } else if (sec_flags & SEC_LOAD) { styp_flags = STYP_TEXT; } else if (sec_flags & SEC_ALLOC) { styp_flags = STYP_BSS; } #ifdef STYP_CLINK if (sec_flags & SEC_TIC54X_CLINK) styp_flags |= STYP_CLINK; #endif #ifdef STYP_BLOCK if (sec_flags & SEC_TIC54X_BLOCK) styp_flags |= STYP_BLOCK; #endif #ifdef STYP_NOLOAD if ((sec_flags & (SEC_NEVER_LOAD | SEC_COFF_SHARED_LIBRARY)) != 0) styp_flags |= STYP_NOLOAD; #endif return styp_flags; } #else /* COFF_WITH_PE */ /* The PE version; see above for the general comments. The non-PE case seems to be more guessing, and breaks PE format; specifically, .rdata is readonly, but it sure ain't text. Really, all this should be set up properly in gas (or whatever assembler is in use), and honor whatever objcopy/strip, etc. sent us as input. */ static long sec_to_styp_flags (const char *sec_name, flagword sec_flags) { long styp_flags = 0; /* caution: there are at least three groups of symbols that have very similar bits and meanings: IMAGE_SCN*, SEC_*, and STYP_*. SEC_* are the BFD internal flags, used for generic BFD information. STYP_* are the COFF section flags which appear in COFF files. IMAGE_SCN_* are the PE section flags which appear in PE files. The STYP_* flags and the IMAGE_SCN_* flags overlap, but there are more IMAGE_SCN_* flags. */ /* FIXME: There is no gas syntax to specify the debug section flag. */ if (CONST_STRNEQ (sec_name, DOT_DEBUG) || CONST_STRNEQ (sec_name, GNU_LINKONCE_WI)) sec_flags = SEC_DEBUGGING; /* skip LOAD */ /* READONLY later */ /* skip RELOC */ if ((sec_flags & SEC_CODE) != 0) styp_flags |= IMAGE_SCN_CNT_CODE; if ((sec_flags & SEC_DATA) != 0) styp_flags |= IMAGE_SCN_CNT_INITIALIZED_DATA; if ((sec_flags & SEC_ALLOC) != 0 && (sec_flags & SEC_LOAD) == 0) styp_flags |= IMAGE_SCN_CNT_UNINITIALIZED_DATA; /* ==STYP_BSS */ /* skip ROM */ /* skip constRUCTOR */ /* skip CONTENTS */ if ((sec_flags & SEC_IS_COMMON) != 0) styp_flags |= IMAGE_SCN_LNK_COMDAT; if ((sec_flags & SEC_DEBUGGING) != 0) styp_flags |= IMAGE_SCN_MEM_DISCARDABLE; if ((sec_flags & SEC_EXCLUDE) != 0) styp_flags |= IMAGE_SCN_LNK_REMOVE; if ((sec_flags & SEC_NEVER_LOAD) != 0) styp_flags |= IMAGE_SCN_LNK_REMOVE; /* skip IN_MEMORY */ /* skip SORT */ if (sec_flags & SEC_LINK_ONCE) styp_flags |= IMAGE_SCN_LNK_COMDAT; /* skip LINK_DUPLICATES */ /* skip LINKER_CREATED */ if (sec_flags & (SEC_ALLOC | SEC_LOAD)) { /* For now, the read/write bits are mapped onto SEC_READONLY, even though the semantics don't quite match. The bits from the input are retained in pei_section_data(abfd, section)->pe_flags. */ styp_flags |= IMAGE_SCN_MEM_READ; /* Always readable. */ if ((sec_flags & SEC_READONLY) == 0) styp_flags |= IMAGE_SCN_MEM_WRITE; /* Invert READONLY for write. */ if (sec_flags & SEC_CODE) styp_flags |= IMAGE_SCN_MEM_EXECUTE; /* CODE->EXECUTE. */ if (sec_flags & SEC_COFF_SHARED) styp_flags |= IMAGE_SCN_MEM_SHARED; /* Shared remains meaningful. */ } return styp_flags; } #endif /* COFF_WITH_PE */ /* 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 probably mirror the changes in sec_to_styp_flags(). */ #ifndef COFF_WITH_PE static bfd_boolean styp_to_sec_flags (bfd *abfd ATTRIBUTE_UNUSED, void * hdr, const char *name, asection *section ATTRIBUTE_UNUSED, flagword *flags_ptr) { struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr; long styp_flags = internal_s->s_flags; flagword sec_flags = 0; #ifdef STYP_BLOCK if (styp_flags & STYP_BLOCK) sec_flags |= SEC_TIC54X_BLOCK; #endif #ifdef STYP_CLINK if (styp_flags & STYP_CLINK) sec_flags |= SEC_TIC54X_CLINK; #endif #ifdef STYP_NOLOAD if (styp_flags & STYP_NOLOAD) 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) 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) sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY; else 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. */ #if defined (COFF_PAGE_SIZE) && !defined (COFF_ALIGN_IN_S_FLAGS) sec_flags |= SEC_DEBUGGING; #endif } else if (styp_flags & STYP_PAD) sec_flags = 0; else if (strcmp (name, _TEXT) == 0) { if (sec_flags & SEC_NEVER_LOAD) sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY; else sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC; } else if (strcmp (name, _DATA) == 0) { if (sec_flags & SEC_NEVER_LOAD) sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY; else sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC; } else if (strcmp (name, _BSS) == 0) { #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 (CONST_STRNEQ (name, DOT_DEBUG) #ifdef _COMMENT || strcmp (name, _COMMENT) == 0 #endif #ifdef COFF_LONG_SECTION_NAMES || CONST_STRNEQ (name, GNU_LINKONCE_WI) #endif || CONST_STRNEQ (name, ".stab")) { #ifdef COFF_PAGE_SIZE sec_flags |= SEC_DEBUGGING; #endif } #ifdef _LIB else if (strcmp (name, _LIB) == 0) ; #endif #ifdef _LIT else if (strcmp (name, _LIT) == 0) sec_flags = SEC_LOAD | SEC_ALLOC | SEC_READONLY; #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 */ #if defined (COFF_LONG_SECTION_NAMES) && defined (COFF_SUPPORT_GNU_LINKONCE) /* As a GNU extension, if the name begins with .gnu.linkonce, we only link a single copy of the section. This is used to support g++. g++ will emit each template expansion in its own section. The symbols will be defined as weak, so that multiple definitions are permitted. The GNU linker extension is to actually discard all but one of the sections. */ if (CONST_STRNEQ (name, ".gnu.linkonce")) sec_flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD; #endif if (flags_ptr == NULL) return FALSE; * flags_ptr = sec_flags; return TRUE; } #else /* COFF_WITH_PE */ static flagword handle_COMDAT (bfd * abfd, flagword sec_flags, void * hdr, const char *name, asection *section) { struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr; bfd_byte *esymstart, *esym, *esymend; int seen_state = 0; char *target_name = NULL; sec_flags |= SEC_LINK_ONCE; /* Unfortunately, the PE format stores essential information in the symbol table, of all places. We need to extract that information now, so that objdump and the linker will know how to handle the section without worrying about the symbols. We can't call slurp_symtab, because the linker doesn't want the swapped symbols. */ /* COMDAT sections are special. The first symbol is the section symbol, which tells what kind of COMDAT section it is. The second symbol is the "comdat symbol" - the one with the unique name. GNU uses the section symbol for the unique name; MS uses ".text" for every comdat section. Sigh. - DJ */ /* This is not mirrored in sec_to_styp_flags(), but there doesn't seem to be a need to, either, and it would at best be rather messy. */ if (! _bfd_coff_get_external_symbols (abfd)) return sec_flags; esymstart = esym = (bfd_byte *) obj_coff_external_syms (abfd); esymend = esym + obj_raw_syment_count (abfd) * bfd_coff_symesz (abfd); while (esym < esymend) { struct internal_syment isym; char buf[SYMNMLEN + 1]; const char *symname; bfd_coff_swap_sym_in (abfd, esym, & isym); if (sizeof (internal_s->s_name) > SYMNMLEN) { /* This case implies that the matching symbol name will be in the string table. */ abort (); } if (isym.n_scnum == section->target_index) { /* According to the MSVC documentation, the first TWO entries with the section # are both of interest to us. The first one is the "section symbol" (section name). The second is the comdat symbol name. Here, we've found the first qualifying entry; we distinguish it from the second with a state flag. In the case of gas-generated (at least until that is fixed) .o files, it isn't necessarily the second one. It may be some other later symbol. Since gas also doesn't follow MS conventions and emits the section similar to .text$<name>, where <something> is the name we're looking for, we distinguish the two as follows: If the section name is simply a section name (no $) we presume it's MS-generated, and look at precisely the second symbol for the comdat name. If the section name has a $, we assume it's gas-generated, and look for <something> (whatever follows the $) as the comdat symbol. */ /* All 3 branches use this. */ symname = _bfd_coff_internal_syment_name (abfd, &isym, buf); if (symname == NULL) abort (); switch (seen_state) { case 0: { /* The first time we've seen the symbol. */ union internal_auxent aux; /* If it isn't the stuff we're expecting, die; The MS documentation is vague, but it appears that the second entry serves BOTH as the comdat symbol and the defining symbol record (either C_STAT or C_EXT, possibly with an aux entry with debug information if it's a function.) It appears the only way to find the second one is to count. (On Intel, they appear to be adjacent, but on Alpha, they have been found separated.) Here, we think we've found the first one, but there's some checking we can do to be sure. */ if (! (isym.n_sclass == C_STAT && isym.n_type == T_NULL && isym.n_value == 0)) abort (); /* FIXME LATER: MSVC generates section names like .text for comdats. Gas generates names like .text$foo__Fv (in the case of a function). See comment above for more. */ if (strcmp (name, symname) != 0) _bfd_error_handler (_("%B: warning: COMDAT symbol '%s' does not match section name '%s'"), abfd, symname, name); seen_state = 1; /* This is the section symbol. */ bfd_coff_swap_aux_in (abfd, (esym + bfd_coff_symesz (abfd)), isym.n_type, isym.n_sclass, 0, isym.n_numaux, & aux); target_name = strchr (name, '$'); if (target_name != NULL) { /* Gas mode. */ seen_state = 2; /* Skip the `$'. */ target_name += 1; } /* FIXME: Microsoft uses NODUPLICATES and ASSOCIATIVE, but gnu uses ANY and SAME_SIZE. Unfortunately, gnu doesn't do the comdat symbols right. So, until we can fix it to do the right thing, we are temporarily disabling comdats for the MS types (they're used in DLLs and C++, but we don't support *their* C++ libraries anyway - DJ. */ /* Cygwin does not follow the MS style, and uses ANY and SAME_SIZE where NODUPLICATES and ASSOCIATIVE should be used. For Interix, we just do the right thing up front. */ switch (aux.x_scn.x_comdat) { case IMAGE_COMDAT_SELECT_NODUPLICATES: #ifdef STRICT_PE_FORMAT sec_flags |= SEC_LINK_DUPLICATES_ONE_ONLY; #else sec_flags &= ~SEC_LINK_ONCE; #endif break; case IMAGE_COMDAT_SELECT_ANY: sec_flags |= SEC_LINK_DUPLICATES_DISCARD; break; case IMAGE_COMDAT_SELECT_SAME_SIZE: sec_flags |= SEC_LINK_DUPLICATES_SAME_SIZE; break; case IMAGE_COMDAT_SELECT_EXACT_MATCH: /* Not yet fully implemented ??? */ sec_flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS; break; /* debug$S gets this case; other implications ??? */ /* There may be no symbol... we'll search the whole table... Is this the right place to play this game? Or should we do it when reading it in. */ case IMAGE_COMDAT_SELECT_ASSOCIATIVE: #ifdef STRICT_PE_FORMAT /* FIXME: This is not currently implemented. */ sec_flags |= SEC_LINK_DUPLICATES_DISCARD; #else sec_flags &= ~SEC_LINK_ONCE; #endif break; default: /* 0 means "no symbol" */ /* debug$F gets this case; other implications ??? */ sec_flags |= SEC_LINK_DUPLICATES_DISCARD; break; } } break; case 2: /* Gas mode: the first matching on partial name. */ #ifndef TARGET_UNDERSCORE #define TARGET_UNDERSCORE 0 #endif /* Is this the name we're looking for ? */ if (strcmp (target_name, symname + (TARGET_UNDERSCORE ? 1 : 0)) != 0) { /* Not the name we're looking for */ esym += (isym.n_numaux + 1) * bfd_coff_symesz (abfd); continue; } /* Fall through. */ case 1: /* MSVC mode: the lexically second symbol (or drop through from the above). */ { char *newname; bfd_size_type amt; /* This must the second symbol with the section #. It is the actual symbol name. Intel puts the two adjacent, but Alpha (at least) spreads them out. */ amt = sizeof (struct coff_comdat_info); coff_section_data (abfd, section)->comdat = bfd_alloc (abfd, amt); if (coff_section_data (abfd, section)->comdat == NULL) abort (); coff_section_data (abfd, section)->comdat->symbol = (esym - esymstart) / bfd_coff_symesz (abfd); amt = strlen (symname) + 1; newname = bfd_alloc (abfd, amt); if (newname == NULL) abort (); strcpy (newname, symname); coff_section_data (abfd, section)->comdat->name = newname; } goto breakloop; } } esym += (isym.n_numaux + 1) * bfd_coff_symesz (abfd); } breakloop: return sec_flags; } /* The PE version; see above for the general comments. Since to set the SEC_LINK_ONCE and associated flags, we have to look at the symbol table anyway, we return the symbol table index of the symbol being used as the COMDAT symbol. This is admittedly ugly, but there's really nowhere else that we have access to the required information. FIXME: Is the COMDAT symbol index used for any purpose other than objdump? */ static bfd_boolean styp_to_sec_flags (bfd *abfd, void * hdr, const char *name, asection *section, flagword *flags_ptr) { struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr; long styp_flags = internal_s->s_flags; flagword sec_flags; bfd_boolean result = TRUE; /* Assume read only unless IMAGE_SCN_MEM_WRITE is specified. */ sec_flags = SEC_READONLY; /* Process each flag bit in styp_flags in turn. */ while (styp_flags) { long flag = styp_flags & - styp_flags; char * unhandled = NULL; styp_flags &= ~ flag; /* We infer from the distinct read/write/execute bits the settings of some of the bfd flags; the actual values, should we need them, are also in pei_section_data (abfd, section)->pe_flags. */ switch (flag) { case STYP_DSECT: unhandled = "STYP_DSECT"; break; case STYP_GROUP: unhandled = "STYP_GROUP"; break; case STYP_COPY: unhandled = "STYP_COPY"; break; case STYP_OVER: unhandled = "STYP_OVER"; break; #ifdef SEC_NEVER_LOAD case STYP_NOLOAD: sec_flags |= SEC_NEVER_LOAD; break; #endif case IMAGE_SCN_MEM_READ: /* Ignored, assume it always to be true. */ break; case IMAGE_SCN_TYPE_NO_PAD: /* Skip. */ break; case IMAGE_SCN_LNK_OTHER: unhandled = "IMAGE_SCN_LNK_OTHER"; break; case IMAGE_SCN_MEM_NOT_CACHED: unhandled = "IMAGE_SCN_MEM_NOT_CACHED"; break; case IMAGE_SCN_MEM_NOT_PAGED: /* Generate a warning message rather using the 'unhandled' variable as this will allow some .sys files generate by other toolchains to be processed. See bugzilla issue 196. */ _bfd_error_handler (_("%B: Warning: Ignoring section flag IMAGE_SCN_MEM_NOT_PAGED in section %s"), abfd, name); break; case IMAGE_SCN_MEM_EXECUTE: sec_flags |= SEC_CODE; break; case IMAGE_SCN_MEM_WRITE: sec_flags &= ~ SEC_READONLY; break; case IMAGE_SCN_MEM_DISCARDABLE: /* The MS PE spec sets the DISCARDABLE flag on .reloc sections but we do not want them to be labelled as debug section, since then strip would remove them. */ if (! CONST_STRNEQ (name, ".reloc")) sec_flags |= SEC_DEBUGGING; break; case IMAGE_SCN_MEM_SHARED: sec_flags |= SEC_COFF_SHARED; break; case IMAGE_SCN_LNK_REMOVE: sec_flags |= SEC_EXCLUDE; break; case IMAGE_SCN_CNT_CODE: sec_flags |= SEC_CODE | SEC_ALLOC | SEC_LOAD; break; case IMAGE_SCN_CNT_INITIALIZED_DATA: sec_flags |= SEC_DATA | SEC_ALLOC | SEC_LOAD; break; case IMAGE_SCN_CNT_UNINITIALIZED_DATA: sec_flags |= SEC_ALLOC; break; case IMAGE_SCN_LNK_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 sec_flags |= SEC_DEBUGGING; #endif break; case IMAGE_SCN_LNK_COMDAT: /* COMDAT gets very special treatment. */ sec_flags = handle_COMDAT (abfd, sec_flags, hdr, name, section); break; default: /* Silently ignore for now. */ break; } /* If the section flag was not handled, report it here. */ if (unhandled != NULL) { (*_bfd_error_handler) (_("%B (%s): Section flag %s (0x%x) ignored"), abfd, name, unhandled, flag); result = FALSE; } } #if defined (COFF_LONG_SECTION_NAMES) && defined (COFF_SUPPORT_GNU_LINKONCE) /* As a GNU extension, if the name begins with .gnu.linkonce, we only link a single copy of the section. This is used to support g++. g++ will emit each template expansion in its own section. The symbols will be defined as weak, so that multiple definitions are permitted. The GNU linker extension is to actually discard all but one of the sections. */ if (CONST_STRNEQ (name, ".gnu.linkonce")) sec_flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD; #endif if (flags_ptr) * flags_ptr = sec_flags; return result; } #endif /* COFF_WITH_PE */ #define get_index(symbol) ((symbol)->udata.i) /* INTERNAL_DEFINITION bfd_coff_backend_data CODE_FRAGMENT .{* COFF symbol classifications. *} . .enum coff_symbol_classification .{ . {* Global symbol. *} . COFF_SYMBOL_GLOBAL, . {* Common symbol. *} . COFF_SYMBOL_COMMON, . {* Undefined symbol. *} . COFF_SYMBOL_UNDEFINED, . {* Local symbol. *} . COFF_SYMBOL_LOCAL, . {* PE section symbol. *} . COFF_SYMBOL_PE_SECTION .}; . Special entry points for gdb to swap in coff symbol table parts: .typedef struct .{ . void (*_bfd_coff_swap_aux_in) . (bfd *, void *, int, int, int, int, void *); . . void (*_bfd_coff_swap_sym_in) . (bfd *, void *, void *); . . void (*_bfd_coff_swap_lineno_in) . (bfd *, void *, void *); . . unsigned int (*_bfd_coff_swap_aux_out) . (bfd *, void *, int, int, int, int, void *); . . unsigned int (*_bfd_coff_swap_sym_out) . (bfd *, void *, void *); . . unsigned int (*_bfd_coff_swap_lineno_out) . (bfd *, void *, void *); . . unsigned int (*_bfd_coff_swap_reloc_out) . (bfd *, void *, void *); . . unsigned int (*_bfd_coff_swap_filehdr_out) . (bfd *, void *, void *); . . unsigned int (*_bfd_coff_swap_aouthdr_out) . (bfd *, void *, void *); . . unsigned int (*_bfd_coff_swap_scnhdr_out) . (bfd *, void *, void *); . . unsigned int _bfd_filhsz; . unsigned int _bfd_aoutsz; . unsigned int _bfd_scnhsz; . unsigned int _bfd_symesz; . unsigned int _bfd_auxesz; . unsigned int _bfd_relsz; . unsigned int _bfd_linesz; . unsigned int _bfd_filnmlen; . bfd_boolean _bfd_coff_long_filenames; . bfd_boolean _bfd_coff_long_section_names; . unsigned int _bfd_coff_default_section_alignment_power; . bfd_boolean _bfd_coff_force_symnames_in_strings; . unsigned int _bfd_coff_debug_string_prefix_length; . . void (*_bfd_coff_swap_filehdr_in) . (bfd *, void *, void *); . . void (*_bfd_coff_swap_aouthdr_in) . (bfd *, void *, void *); . . void (*_bfd_coff_swap_scnhdr_in) . (bfd *, void *, void *); . . void (*_bfd_coff_swap_reloc_in) . (bfd *abfd, void *, void *); . . bfd_boolean (*_bfd_coff_bad_format_hook) . (bfd *, void *); . . bfd_boolean (*_bfd_coff_set_arch_mach_hook) . (bfd *, void *); . . void * (*_bfd_coff_mkobject_hook) . (bfd *, void *, void *); . . bfd_boolean (*_bfd_styp_to_sec_flags_hook) . (bfd *, void *, const char *, asection *, flagword *); . . void (*_bfd_set_alignment_hook) . (bfd *, asection *, void *); . . bfd_boolean (*_bfd_coff_slurp_symbol_table) . (bfd *); . . bfd_boolean (*_bfd_coff_symname_in_debug) . (bfd *, struct internal_syment *); . . bfd_boolean (*_bfd_coff_pointerize_aux_hook) . (bfd *, combined_entry_type *, combined_entry_type *, . unsigned int, combined_entry_type *); . . bfd_boolean (*_bfd_coff_print_aux) . (bfd *, FILE *, combined_entry_type *, combined_entry_type *, . combined_entry_type *, unsigned int); . . void (*_bfd_coff_reloc16_extra_cases) . (bfd *, struct bfd_link_info *, struct bfd_link_order *, arelent *, . bfd_byte *, unsigned int *, unsigned int *); . . int (*_bfd_coff_reloc16_estimate) . (bfd *, asection *, arelent *, unsigned int, . struct bfd_link_info *); . . enum coff_symbol_classification (*_bfd_coff_classify_symbol) . (bfd *, struct internal_syment *); . . bfd_boolean (*_bfd_coff_compute_section_file_positions) . (bfd *); . . bfd_boolean (*_bfd_coff_start_final_link) . (bfd *, struct bfd_link_info *); . . bfd_boolean (*_bfd_coff_relocate_section) . (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, . struct internal_reloc *, struct internal_syment *, asection **); . . reloc_howto_type *(*_bfd_coff_rtype_to_howto) . (bfd *, asection *, struct internal_reloc *, . struct coff_link_hash_entry *, struct internal_syment *, . bfd_vma *); . . bfd_boolean (*_bfd_coff_adjust_symndx) . (bfd *, struct bfd_link_info *, bfd *, asection *, . struct internal_reloc *, bfd_boolean *); . . bfd_boolean (*_bfd_coff_link_add_one_symbol) . (struct bfd_link_info *, bfd *, const char *, flagword, . asection *, bfd_vma, const char *, bfd_boolean, bfd_boolean, . struct bfd_link_hash_entry **); . . bfd_boolean (*_bfd_coff_link_output_has_begun) . (bfd *, struct coff_final_link_info *); . . bfd_boolean (*_bfd_coff_final_link_postscript) . (bfd *, struct coff_final_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_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz) .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz) .#define bfd_coff_filnmlen(abfd) (coff_backend_info (abfd)->_bfd_filnmlen) .#define bfd_coff_long_filenames(abfd) \ . (coff_backend_info (abfd)->_bfd_coff_long_filenames) .#define bfd_coff_long_section_names(abfd) \ . (coff_backend_info (abfd)->_bfd_coff_long_section_names) .#define bfd_coff_default_section_alignment_power(abfd) \ . (coff_backend_info (abfd)->_bfd_coff_default_section_alignment_power) .#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_swap_reloc_in(abfd, i, o) \ . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_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, name, section, flags_ptr)\ . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook)\ . (abfd, scnhdr, name, section, flags_ptr)) . .#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_force_symnames_in_strings(abfd)\ . (coff_backend_info (abfd)->_bfd_coff_force_symnames_in_strings) . .#define bfd_coff_debug_string_prefix_length(abfd)\ . (coff_backend_info (abfd)->_bfd_coff_debug_string_prefix_length) . .#define bfd_coff_print_aux(abfd, file, base, symbol, aux, indaux)\ . ((coff_backend_info (abfd)->_bfd_coff_print_aux)\ . (abfd, file, base, symbol, aux, indaux)) . .#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)) . .#define bfd_coff_classify_symbol(abfd, sym)\ . ((coff_backend_info (abfd)->_bfd_coff_classify_symbol)\ . (abfd, sym)) . .#define bfd_coff_compute_section_file_positions(abfd)\ . ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\ . (abfd)) . .#define bfd_coff_start_final_link(obfd, info)\ . ((coff_backend_info (obfd)->_bfd_coff_start_final_link)\ . (obfd, info)) .#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\ . ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\ . (obfd, info, ibfd, o, con, rel, isyms, secs)) .#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\ . ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\ . (abfd, sec, rel, h, sym, addendp)) .#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\ . ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\ . (obfd, info, ibfd, sec, rel, adjustedp)) .#define bfd_coff_link_add_one_symbol(info, abfd, name, flags, section,\ . value, string, cp, coll, hashp)\ . ((coff_backend_info (abfd)->_bfd_coff_link_add_one_symbol)\ . (info, abfd, name, flags, section, value, string, cp, coll, hashp)) . .#define bfd_coff_link_output_has_begun(a,p) \ . ((coff_backend_info (a)->_bfd_coff_link_output_has_begun) (a, p)) .#define bfd_coff_final_link_postscript(a,p) \ . ((coff_backend_info (a)->_bfd_coff_final_link_postscript) (a, p)) . */ /* See whether the magic number matches. */ static bfd_boolean coff_bad_format_hook (bfd * abfd ATTRIBUTE_UNUSED, void * 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 && bfd_coff_aoutsz (abfd) != internal_f->f_opthdr) return FALSE; #endif return TRUE; } #ifdef TICOFF static bfd_boolean ticoff0_bad_format_hook (bfd *abfd ATTRIBUTE_UNUSED, void * filehdr) { struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; if (COFF0_BADMAG (*internal_f)) return FALSE; return TRUE; } #endif #ifdef TICOFF static bfd_boolean ticoff1_bad_format_hook (bfd *abfd ATTRIBUTE_UNUSED, void * filehdr) { struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; if (COFF1_BADMAG (*internal_f)) return FALSE; return TRUE; } #endif /* Check whether this section uses an alignment other than the default. */ static void coff_set_custom_section_alignment (bfd *abfd ATTRIBUTE_UNUSED, asection *section, const struct coff_section_alignment_entry *alignment_table, const unsigned int table_size) { const unsigned int default_alignment = COFF_DEFAULT_SECTION_ALIGNMENT_POWER; unsigned int i; for (i = 0; i < table_size; ++i) { const char *secname = bfd_get_section_name (abfd, section); if (alignment_table[i].comparison_length == (unsigned int) -1 ? strcmp (alignment_table[i].name, secname) == 0 : strncmp (alignment_table[i].name, secname, alignment_table[i].comparison_length) == 0) break; } if (i >= table_size) return; if (alignment_table[i].default_alignment_min != COFF_ALIGNMENT_FIELD_EMPTY && default_alignment < alignment_table[i].default_alignment_min) return; if (alignment_table[i].default_alignment_max != COFF_ALIGNMENT_FIELD_EMPTY #if COFF_DEFAULT_SECTION_ALIGNMENT_POWER != 0 && default_alignment > alignment_table[i].default_alignment_max #endif ) return; section->alignment_power = alignment_table[i].alignment_power; } /* Custom section alignment records. */ static const struct coff_section_alignment_entry coff_section_alignment_table[] = { #ifdef COFF_SECTION_ALIGNMENT_ENTRIES COFF_SECTION_ALIGNMENT_ENTRIES, #endif /* There must not be any gaps between .stabstr sections. */ { COFF_SECTION_NAME_PARTIAL_MATCH (".stabstr"), 1, COFF_ALIGNMENT_FIELD_EMPTY, 0 }, /* The .stab section must be aligned to 2**2 at most, to avoid gaps. */ { COFF_SECTION_NAME_PARTIAL_MATCH (".stab"), 3, COFF_ALIGNMENT_FIELD_EMPTY, 2 }, /* Similarly for the .ctors and .dtors sections. */ { COFF_SECTION_NAME_EXACT_MATCH (".ctors"), 3, COFF_ALIGNMENT_FIELD_EMPTY, 2 }, { COFF_SECTION_NAME_EXACT_MATCH (".dtors"), 3, COFF_ALIGNMENT_FIELD_EMPTY, 2 } }; static const unsigned int coff_section_alignment_table_size = sizeof coff_section_alignment_table / sizeof coff_section_alignment_table[0]; /* Initialize a section structure with information peculiar to this particular implementation of COFF. */ static bfd_boolean coff_new_section_hook (bfd * abfd, asection * section) { combined_entry_type *native; bfd_size_type amt; section->alignment_power = COFF_DEFAULT_SECTION_ALIGNMENT_POWER; #ifdef RS6000COFF_C if (bfd_xcoff_text_align_power (abfd) != 0 && strcmp (bfd_get_section_name (abfd, section), ".text") == 0) section->alignment_power = bfd_xcoff_text_align_power (abfd); if (bfd_xcoff_data_align_power (abfd) != 0 && strcmp (bfd_get_section_name (abfd, section), ".data") == 0) section->alignment_power = bfd_xcoff_data_align_power (abfd); #endif /* Set up the section symbol. */ if (!_bfd_generic_new_section_hook (abfd, section)) return FALSE; /* Allocate aux records for section symbols, to store size and related info. @@ The 10 is a guess at a plausible maximum number of aux entries (but shouldn't be a constant). */ amt = sizeof (combined_entry_type) * 10; native = bfd_zalloc (abfd, amt); if (native == NULL) return FALSE; /* We don't need to set up n_name, n_value, or n_scnum in the native symbol information, since they'll be overridden by the BFD symbol anyhow. However, we do need to set the type and storage class, in case this symbol winds up getting written out. The value 0 for n_numaux is already correct. */ native->u.syment.n_type = T_NULL; native->u.syment.n_sclass = C_STAT; coffsymbol (section->symbol)->native = native; coff_set_custom_section_alignment (abfd, section, coff_section_alignment_table, coff_section_alignment_table_size); return TRUE; } #ifdef COFF_ALIGN_IN_SECTION_HEADER /* Set the alignment of a BFD section. */ static void coff_set_alignment_hook (bfd * abfd ATTRIBUTE_UNUSED, asection * section, void * scnhdr) { struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr; unsigned int i; #ifdef I960 /* Extract ALIGN from 2**ALIGN stored in section header. */ for (i = 0; i < 32; i++) if ((1 << i) >= hdr->s_align) break; #endif #ifdef TIC80COFF /* TI tools puts the alignment power in bits 8-11. */ i = (hdr->s_flags >> 8) & 0xF ; #endif #ifdef COFF_DECODE_ALIGNMENT i = COFF_DECODE_ALIGNMENT(hdr->s_flags); #endif section->alignment_power = i; #ifdef coff_set_section_load_page coff_set_section_load_page (section, hdr->s_page); #endif } #else /* ! COFF_ALIGN_IN_SECTION_HEADER */ #ifdef COFF_WITH_PE static void coff_set_alignment_hook (bfd * abfd ATTRIBUTE_UNUSED, asection * section, void * scnhdr) { struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr; bfd_size_type amt; unsigned int alignment_power_const = hdr->s_flags & IMAGE_SCN_ALIGN_POWER_BIT_MASK; switch (alignment_power_const) { case IMAGE_SCN_ALIGN_8192BYTES: case IMAGE_SCN_ALIGN_4096BYTES: case IMAGE_SCN_ALIGN_2048BYTES: case IMAGE_SCN_ALIGN_1024BYTES: case IMAGE_SCN_ALIGN_512BYTES: case IMAGE_SCN_ALIGN_256BYTES: case IMAGE_SCN_ALIGN_128BYTES: case IMAGE_SCN_ALIGN_64BYTES: case IMAGE_SCN_ALIGN_32BYTES: case IMAGE_SCN_ALIGN_16BYTES: case IMAGE_SCN_ALIGN_8BYTES: case IMAGE_SCN_ALIGN_4BYTES: case IMAGE_SCN_ALIGN_2BYTES: case IMAGE_SCN_ALIGN_1BYTES: section->alignment_power = IMAGE_SCN_ALIGN_POWER_NUM (alignment_power_const); break; default: break; } /* In a PE image file, the s_paddr field holds the virtual size of a section, while the s_size field holds the raw size. We also keep the original section flag value, since not every bit can be mapped onto a generic BFD section bit. */ if (coff_section_data (abfd, section) == NULL) { amt = sizeof (struct coff_section_tdata); section->used_by_bfd = bfd_zalloc (abfd, amt); if (section->used_by_bfd == NULL) /* FIXME: Return error. */ abort (); } if (pei_section_data (abfd, section) == NULL) { amt = sizeof (struct pei_section_tdata); coff_section_data (abfd, section)->tdata = bfd_zalloc (abfd, amt); if (coff_section_data (abfd, section)->tdata == NULL) /* FIXME: Return error. */ abort (); } pei_section_data (abfd, section)->virt_size = hdr->s_paddr; pei_section_data (abfd, section)->pe_flags = hdr->s_flags; section->lma = hdr->s_vaddr; /* Check for extended relocs. */ if (hdr->s_flags & IMAGE_SCN_LNK_NRELOC_OVFL) { struct external_reloc dst; struct internal_reloc n; file_ptr oldpos = bfd_tell (abfd); bfd_size_type relsz = bfd_coff_relsz (abfd); bfd_seek (abfd, (file_ptr) hdr->s_relptr, 0); if (bfd_bread (& dst, relsz, abfd) != relsz) return; coff_swap_reloc_in (abfd, &dst, &n); bfd_seek (abfd, oldpos, 0); section->reloc_count = hdr->s_nreloc = n.r_vaddr - 1; section->rel_filepos += relsz; } else if (hdr->s_nreloc == 0xffff) (*_bfd_error_handler) ("%s: warning: claims to have 0xffff relocs, without overflow", bfd_get_filename (abfd)); } #undef ALIGN_SET #undef ELIFALIGN_SET #else /* ! COFF_WITH_PE */ #ifdef RS6000COFF_C /* We grossly abuse this function to handle XCOFF overflow headers. When we see one, we correct the reloc and line number counts in the real header, and remove the section we just created. */ static void coff_set_alignment_hook (bfd *abfd, asection *section, void * scnhdr) { struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr; asection *real_sec; if ((hdr->s_flags & STYP_OVRFLO) == 0) return; real_sec = coff_section_from_bfd_index (abfd, (int) hdr->s_nreloc); if (real_sec == NULL) return; real_sec->reloc_count = hdr->s_paddr; real_sec->lineno_count = hdr->s_vaddr; if (!bfd_section_removed_from_list (abfd, section)) { bfd_section_list_remove (abfd, section); --abfd->section_count; } } #else /* ! RS6000COFF_C */ #define coff_set_alignment_hook \ ((void (*) (bfd *, asection *, void *)) bfd_void) #endif /* ! RS6000COFF_C */ #endif /* ! COFF_WITH_PE */ #endif /* ! COFF_ALIGN_IN_SECTION_HEADER */ #ifndef coff_mkobject static bfd_boolean coff_mkobject (bfd * abfd) { coff_data_type *coff; bfd_size_type amt = sizeof (coff_data_type); abfd->tdata.coff_obj_data = bfd_zalloc (abfd, amt); if (abfd->tdata.coff_obj_data == NULL) return FALSE; coff = coff_data (abfd); coff->symbols = NULL; coff->conversion_table = NULL; coff->raw_syments = NULL; coff->relocbase = 0; coff->local_toc_sym_map = 0; /* make_abs_section(abfd);*/ return TRUE; } #endif /* Create the COFF backend specific information. */ #ifndef coff_mkobject_hook static void * coff_mkobject_hook (bfd * abfd, void * filehdr, void * aouthdr ATTRIBUTE_UNUSED) { struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; coff_data_type *coff; if (! coff_mkobject (abfd)) return NULL; coff = coff_data (abfd); coff->sym_filepos = internal_f->f_symptr; /* 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 = bfd_coff_symesz (abfd); coff->local_auxesz = bfd_coff_auxesz (abfd); coff->local_linesz = bfd_coff_linesz (abfd); coff->timestamp = internal_f->f_timdat; obj_raw_syment_count (abfd) = obj_conv_table_size (abfd) = internal_f->f_nsyms; #ifdef RS6000COFF_C if ((internal_f->f_flags & F_SHROBJ) != 0) abfd->flags |= DYNAMIC; if (aouthdr != NULL && internal_f->f_opthdr >= bfd_coff_aoutsz (abfd)) { struct internal_aouthdr *internal_a = (struct internal_aouthdr *) aouthdr; struct xcoff_tdata *xcoff; xcoff = xcoff_data (abfd); # ifdef U803XTOCMAGIC xcoff->xcoff64 = internal_f->f_magic == U803XTOCMAGIC; # else xcoff->xcoff64 = 0; # endif xcoff->full_aouthdr = TRUE; xcoff->toc = internal_a->o_toc; xcoff->sntoc = internal_a->o_sntoc; xcoff->snentry = internal_a->o_snentry; bfd_xcoff_text_align_power (abfd) = internal_a->o_algntext; bfd_xcoff_data_align_power (abfd) = internal_a->o_algndata; xcoff->modtype = internal_a->o_modtype; xcoff->cputype = internal_a->o_cputype; xcoff->maxdata = internal_a->o_maxdata; xcoff->maxstack = internal_a->o_maxstack; } #endif #ifdef ARM /* Set the flags field from the COFF header read in. */ if (! _bfd_coff_arm_set_private_flags (abfd, internal_f->f_flags)) coff->flags = 0; #endif #ifdef COFF_WITH_PE /* FIXME: I'm not sure this is ever executed, since peicode.h defines coff_mkobject_hook. */ if ((internal_f->f_flags & IMAGE_FILE_DEBUG_STRIPPED) == 0) abfd->flags |= HAS_DEBUG; #endif return coff; } #endif /* 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 bfd_boolean coff_set_arch_mach_hook (bfd *abfd, void * filehdr) { unsigned long machine; enum bfd_architecture arch; struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; /* Zero selects the default machine for an arch. */ machine = 0; switch (internal_f->f_magic) { #ifdef OR32_MAGIC_BIG case OR32_MAGIC_BIG: case OR32_MAGIC_LITTLE: arch = bfd_arch_or32; break; #endif #ifdef PPCMAGIC case PPCMAGIC: arch = bfd_arch_powerpc; break; #endif #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; break; #endif #ifdef AMD64MAGIC case AMD64MAGIC: arch = bfd_arch_i386; machine = bfd_mach_x86_64; break; #endif #ifdef IA64MAGIC case IA64MAGIC: arch = bfd_arch_ia64; break; #endif #ifdef ARMMAGIC case ARMMAGIC: case ARMPEMAGIC: case THUMBPEMAGIC: arch = bfd_arch_arm; machine = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION); if (machine == bfd_mach_arm_unknown) { switch (internal_f->f_flags & F_ARM_ARCHITECTURE_MASK) { case F_ARM_2: machine = bfd_mach_arm_2; break; case F_ARM_2a: machine = bfd_mach_arm_2a; break; case F_ARM_3: machine = bfd_mach_arm_3; break; default: case F_ARM_3M: machine = bfd_mach_arm_3M; break; case F_ARM_4: machine = bfd_mach_arm_4; break; case F_ARM_4T: machine = bfd_mach_arm_4T; break; /* The COFF header does not have enough bits available to cover all the different ARM architectures. So we interpret F_ARM_5, the highest flag value to mean "the highest ARM architecture known to BFD" which is currently the XScale. */ case F_ARM_5: machine = bfd_mach_arm_XScale; break; } } 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 = bfd_mach_m68020; break; #endif #ifdef MAXQ20MAGIC case MAXQ20MAGIC: arch = bfd_arch_maxq; switch (internal_f->f_flags & F_MACHMASK) { case F_MAXQ10: machine = bfd_mach_maxq10; break; case F_MAXQ20: machine = bfd_mach_maxq20; break; default: return FALSE; } break; #endif #ifdef MC88MAGIC case MC88MAGIC: case MC88DMAGIC: case MC88OMAGIC: arch = bfd_arch_m88k; machine = 88100; break; #endif #ifdef Z80MAGIC case Z80MAGIC: arch = bfd_arch_z80; switch (internal_f->f_flags & F_MACHMASK) { case 0: case bfd_mach_z80strict << 12: case bfd_mach_z80 << 12: case bfd_mach_z80full << 12: case bfd_mach_r800 << 12: machine = ((unsigned)internal_f->f_flags & F_MACHMASK) >> 12; break; default: return FALSE; } 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 I860 case I860MAGIC: arch = bfd_arch_i860; 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; case F_I960JX: machine = bfd_mach_i960_jx; break; case F_I960HX: machine = bfd_mach_i960_hx; break; } break; #endif #endif #ifdef RS6000COFF_C #ifdef XCOFF64 case U64_TOCMAGIC: case U803XTOCMAGIC: #else case U802ROMAGIC: case U802WRMAGIC: case U802TOCMAGIC: #endif { int cputype; if (xcoff_data (abfd)->cputype != -1) cputype = xcoff_data (abfd)->cputype & 0xff; else { /* We did not get a value from the a.out header. If the file has not been stripped, we may be able to get the architecture information from the first symbol, if it is a .file symbol. */ if (obj_raw_syment_count (abfd) == 0) cputype = 0; else { bfd_byte *buf; struct internal_syment sym; bfd_size_type amt = bfd_coff_symesz (abfd); buf = bfd_malloc (amt); if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 || bfd_bread (buf, amt, abfd) != amt) { free (buf); return FALSE; } bfd_coff_swap_sym_in (abfd, buf, & sym); if (sym.n_sclass == C_FILE) cputype = sym.n_type & 0xff; else cputype = 0; free (buf); } } /* FIXME: We don't handle all cases here. */ switch (cputype) { default: case 0: arch = bfd_xcoff_architecture (abfd); machine = bfd_xcoff_machine (abfd); break; case 1: arch = bfd_arch_powerpc; machine = bfd_mach_ppc_601; break; case 2: /* 64 bit PowerPC */ arch = bfd_arch_powerpc; machine = bfd_mach_ppc_620; break; case 3: arch = bfd_arch_powerpc; machine = bfd_mach_ppc; break; case 4: arch = bfd_arch_rs6000; machine = bfd_mach_rs6k; break; } } break; #endif #ifdef WE32KMAGIC case WE32KMAGIC: arch = bfd_arch_we32k; 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 H8300SMAGIC case H8300SMAGIC: arch = bfd_arch_h8300; machine = bfd_mach_h8300s; /* !! FIXME this probably isn't the right place for this. */ abfd->flags |= BFD_IS_RELAXABLE; break; #endif #ifdef H8300HNMAGIC case H8300HNMAGIC: arch = bfd_arch_h8300; machine = bfd_mach_h8300hn; /* !! FIXME this probably isn't the right place for this. */ abfd->flags |= BFD_IS_RELAXABLE; break; #endif #ifdef H8300SNMAGIC case H8300SNMAGIC: arch = bfd_arch_h8300; machine = bfd_mach_h8300sn; /* !! FIXME this probably isn't the right place for this. */ abfd->flags |= BFD_IS_RELAXABLE; break; #endif #ifdef SH_ARCH_MAGIC_BIG case SH_ARCH_MAGIC_BIG: case SH_ARCH_MAGIC_LITTLE: #ifdef COFF_WITH_PE case SH_ARCH_MAGIC_WINCE: #endif arch = bfd_arch_sh; break; #endif #ifdef MIPS_ARCH_MAGIC_WINCE case MIPS_ARCH_MAGIC_WINCE: arch = bfd_arch_mips; break; #endif #ifdef H8500MAGIC case H8500MAGIC: arch = bfd_arch_h8500; break; #endif #ifdef SPARCMAGIC case SPARCMAGIC: #ifdef LYNXCOFFMAGIC case LYNXCOFFMAGIC: #endif arch = bfd_arch_sparc; break; #endif #ifdef TIC30MAGIC case TIC30MAGIC: arch = bfd_arch_tic30; break; #endif #ifdef TICOFF0MAGIC #ifdef TICOFF_TARGET_ARCH /* This TI COFF section should be used by all new TI COFF v0 targets. */ case TICOFF0MAGIC: arch = TICOFF_TARGET_ARCH; machine = TICOFF_TARGET_MACHINE_GET (internal_f->f_flags); break; #endif #endif #ifdef TICOFF1MAGIC /* This TI COFF section should be used by all new TI COFF v1/2 targets. */ /* TI COFF1 and COFF2 use the target_id field to specify which arch. */ case TICOFF1MAGIC: case TICOFF2MAGIC: switch (internal_f->f_target_id) { #ifdef TI_TARGET_ID case TI_TARGET_ID: arch = TICOFF_TARGET_ARCH; machine = TICOFF_TARGET_MACHINE_GET (internal_f->f_flags); break; #endif default: arch = bfd_arch_obscure; (*_bfd_error_handler) (_("Unrecognized TI COFF target id '0x%x'"), internal_f->f_target_id); break; } break; #endif #ifdef TIC80_ARCH_MAGIC case TIC80_ARCH_MAGIC: arch = bfd_arch_tic80; break; #endif #ifdef MCOREMAGIC case MCOREMAGIC: arch = bfd_arch_mcore; break; #endif #ifdef W65MAGIC case W65MAGIC: arch = bfd_arch_w65; 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 bfd_boolean symname_in_debug_hook (bfd * abfd ATTRIBUTE_UNUSED, struct internal_syment *sym) { return SYMNAME_IN_DEBUG (sym) != 0; } #else #define symname_in_debug_hook \ (bfd_boolean (*) (bfd *, struct internal_syment *)) bfd_false #endif #ifdef RS6000COFF_C #ifdef XCOFF64 #define FORCE_SYMNAMES_IN_STRINGS #endif /* Handle the csect auxent of a C_EXT or C_HIDEXT symbol. */ static bfd_boolean coff_pointerize_aux_hook (bfd *abfd ATTRIBUTE_UNUSED, combined_entry_type *table_base, combined_entry_type *symbol, unsigned int indaux, combined_entry_type *aux) { int class = symbol->u.syment.n_sclass; if ((class == C_EXT || class == C_HIDEXT) && indaux + 1 == symbol->u.syment.n_numaux) { if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) == XTY_LD) { aux->u.auxent.x_csect.x_scnlen.p = table_base + aux->u.auxent.x_csect.x_scnlen.l; aux->fix_scnlen = 1; } /* Return TRUE to indicate that the caller should not do any further work on this auxent. */ return TRUE; } /* Return FALSE to indicate that this auxent should be handled by the caller. */ return FALSE; } #else #ifdef I960 /* We don't want to pointerize bal entries. */ static bfd_boolean coff_pointerize_aux_hook (bfd *abfd ATTRIBUTE_UNUSED, combined_entry_type *table_base ATTRIBUTE_UNUSED, combined_entry_type *symbol, unsigned int indaux, combined_entry_type *aux ATTRIBUTE_UNUSED) { /* Return TRUE if we don't want to pointerize this aux entry, which is the case for the lastfirst aux entry for a C_LEAFPROC symbol. */ return (indaux == 1 && (symbol->u.syment.n_sclass == C_LEAFPROC || symbol->u.syment.n_sclass == C_LEAFSTAT || symbol->u.syment.n_sclass == C_LEAFEXT)); } #else /* ! I960 */ #define coff_pointerize_aux_hook 0 #endif /* ! I960 */ #endif /* ! RS6000COFF_C */ /* Print an aux entry. This returns TRUE if it has printed it. */ static bfd_boolean coff_print_aux (bfd *abfd ATTRIBUTE_UNUSED, FILE *file ATTRIBUTE_UNUSED, combined_entry_type *table_base ATTRIBUTE_UNUSED, combined_entry_type *symbol ATTRIBUTE_UNUSED, combined_entry_type *aux ATTRIBUTE_UNUSED, unsigned int indaux ATTRIBUTE_UNUSED) { #ifdef RS6000COFF_C if ((symbol->u.syment.n_sclass == C_EXT || symbol->u.syment.n_sclass == C_HIDEXT) && indaux + 1 == symbol->u.syment.n_numaux) { /* This is a csect entry. */ fprintf (file, "AUX "); if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) != XTY_LD) { BFD_ASSERT (! aux->fix_scnlen); #ifdef XCOFF64 fprintf (file, "val %5lld", (long long) aux->u.auxent.x_csect.x_scnlen.l); #else fprintf (file, "val %5ld", (long) aux->u.auxent.x_csect.x_scnlen.l); #endif } else { fprintf (file, "indx "); if (! aux->fix_scnlen) #ifdef XCOFF64 fprintf (file, "%4lld", (long long) aux->u.auxent.x_csect.x_scnlen.l); #else fprintf (file, "%4ld", (long) aux->u.auxent.x_csect.x_scnlen.l); #endif else fprintf (file, "%4ld", (long) (aux->u.auxent.x_csect.x_scnlen.p - table_base)); } fprintf (file, " prmhsh %ld snhsh %u typ %d algn %d clss %u stb %ld snstb %u", aux->u.auxent.x_csect.x_parmhash, (unsigned int) aux->u.auxent.x_csect.x_snhash, SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp), SMTYP_ALIGN (aux->u.auxent.x_csect.x_smtyp), (unsigned int) aux->u.auxent.x_csect.x_smclas, aux->u.auxent.x_csect.x_stab, (unsigned int) aux->u.auxent.x_csect.x_snstab); return TRUE; } #endif /* Return FALSE to indicate that no special action was taken. */ return FALSE; } /* 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. */ #ifdef TARG_AUX /* AUX's ld wants relocations to be sorted. */ static int compare_arelent_ptr (const void * x, const void * y) { const arelent **a = (const arelent **) x; const arelent **b = (const arelent **) y; bfd_size_type aadr = (*a)->address; bfd_size_type badr = (*b)->address; return (aadr < badr ? -1 : badr < aadr ? 1 : 0); } #endif /* TARG_AUX */ static bfd_boolean coff_write_relocs (bfd * abfd, int first_undef) { asection *s; for (s = abfd->sections; s != NULL; s = s->next) { unsigned int i; struct external_reloc dst; arelent **p; #ifndef TARG_AUX p = s->orelocation; #else { /* Sort relocations before we write them out. */ bfd_size_type amt; amt = s->reloc_count; amt *= sizeof (arelent *); p = bfd_malloc (amt); if (p == NULL && s->reloc_count > 0) return FALSE; memcpy (p, s->orelocation, (size_t) amt); qsort (p, s->reloc_count, sizeof (arelent *), compare_arelent_ptr); } #endif if (bfd_seek (abfd, s->rel_filepos, SEEK_SET) != 0) return FALSE; #ifdef COFF_WITH_PE if (obj_pe (abfd) && s->reloc_count >= 0xffff) { /* Encode real count here as first reloc. */ struct internal_reloc n; memset (& n, 0, sizeof (n)); /* Add one to count *this* reloc (grr). */ n.r_vaddr = s->reloc_count + 1; coff_swap_reloc_out (abfd, &n, &dst); if (bfd_bwrite (& dst, (bfd_size_type) bfd_coff_relsz (abfd), abfd) != bfd_coff_relsz (abfd)) return FALSE; } #endif for (i = 0; i < s->reloc_count; i++) { struct internal_reloc n; arelent *q = p[i]; memset (& n, 0, sizeof (n)); /* Now we've renumbered the symbols we know where the undefined symbols live in the table. Check the reloc entries for symbols who's output bfd isn't the right one. This is because the symbol was undefined (which means that all the pointers are never made to point to the same place). This is a bad thing,'cause the symbols attached to the output bfd are indexed, so that the relocation entries know which symbol index they point to. So we have to look up the output symbol here. */ if (q->sym_ptr_ptr[0]->the_bfd != abfd) { int j; const char *sname = q->sym_ptr_ptr[0]->name; asymbol **outsyms = abfd->outsymbols; for (j = first_undef; outsyms[j]; j++) { const char *intable = outsyms[j]->name; if (strcmp (intable, sname) == 0) { /* Got a hit, so repoint the reloc. */ q->sym_ptr_ptr = outsyms + j; break; } } } 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) { #ifdef SECTION_RELATIVE_ABSOLUTE_SYMBOL_P if (SECTION_RELATIVE_ABSOLUTE_SYMBOL_P (q, s)) #else if ((*q->sym_ptr_ptr)->section == bfd_abs_section_ptr && ((*q->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0) #endif /* This is a relocation relative to the absolute symbol. */ n.r_symndx = -1; else { n.r_symndx = get_index ((*(q->sym_ptr_ptr))); /* Check to see if the symbol reloc points to a symbol we don't have in our symbol table. */ if (n.r_symndx > obj_conv_table_size (abfd)) { bfd_set_error (bfd_error_bad_value); _bfd_error_handler (_("%B: reloc against a non-existant symbol index: %ld"), abfd, n.r_symndx); return FALSE; } } } #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_bwrite (& dst, (bfd_size_type) bfd_coff_relsz (abfd), abfd) != bfd_coff_relsz (abfd)) return FALSE; } #ifdef TARG_AUX if (p != NULL) free (p); #endif } 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 bfd_boolean coff_set_flags (bfd * abfd, unsigned int *magicp ATTRIBUTE_UNUSED, unsigned short *flagsp ATTRIBUTE_UNUSED) { switch (bfd_get_arch (abfd)) { #ifdef Z80MAGIC case bfd_arch_z80: *magicp = Z80MAGIC; switch (bfd_get_mach (abfd)) { case 0: case bfd_mach_z80strict: case bfd_mach_z80: case bfd_mach_z80full: case bfd_mach_r800: *flagsp = bfd_get_mach (abfd) << 12; break; default: return FALSE; } return TRUE; #endif #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; 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; case bfd_mach_i960_jx: flags = F_I960JX; break; case bfd_mach_i960_hx: flags = F_I960HX; break; default: return FALSE; } *flagsp = flags; return TRUE; } break; #endif #ifdef TIC30MAGIC case bfd_arch_tic30: *magicp = TIC30MAGIC; return TRUE; #endif #ifdef TICOFF_DEFAULT_MAGIC case TICOFF_TARGET_ARCH: /* If there's no indication of which version we want, use the default. */ if (!abfd->xvec ) *magicp = TICOFF_DEFAULT_MAGIC; else { /* We may want to output in a different COFF version. */ switch (abfd->xvec->name[4]) { case '0': *magicp = TICOFF0MAGIC; break; case '1': *magicp = TICOFF1MAGIC; break; case '2': *magicp = TICOFF2MAGIC; break; default: return FALSE; } } TICOFF_TARGET_MACHINE_SET (flagsp, bfd_get_mach (abfd)); return TRUE; #endif #ifdef TIC80_ARCH_MAGIC case bfd_arch_tic80: *magicp = TIC80_ARCH_MAGIC; return TRUE; #endif #ifdef ARMMAGIC case bfd_arch_arm: #ifdef ARM_WINCE * magicp = ARMPEMAGIC; #else * magicp = ARMMAGIC; #endif * flagsp = 0; if (APCS_SET (abfd)) { if (APCS_26_FLAG (abfd)) * flagsp |= F_APCS26; if (APCS_FLOAT_FLAG (abfd)) * flagsp |= F_APCS_FLOAT; if (PIC_FLAG (abfd)) * flagsp |= F_PIC; } if (INTERWORK_SET (abfd) && INTERWORK_FLAG (abfd)) * flagsp |= F_INTERWORK; switch (bfd_get_mach (abfd)) { case bfd_mach_arm_2: * flagsp |= F_ARM_2; break; case bfd_mach_arm_2a: * flagsp |= F_ARM_2a; break; case bfd_mach_arm_3: * flagsp |= F_ARM_3; break; case bfd_mach_arm_3M: * flagsp |= F_ARM_3M; break; case bfd_mach_arm_4: * flagsp |= F_ARM_4; break; case bfd_mach_arm_4T: * flagsp |= F_ARM_4T; break; case bfd_mach_arm_5: * flagsp |= F_ARM_5; break; /* FIXME: we do not have F_ARM vaues greater than F_ARM_5. See also the comment in coff_set_arch_mach_hook(). */ case bfd_mach_arm_5T: * flagsp |= F_ARM_5; break; case bfd_mach_arm_5TE: * flagsp |= F_ARM_5; break; case bfd_mach_arm_XScale: * flagsp |= F_ARM_5; break; } return TRUE; #endif #ifdef PPCMAGIC case bfd_arch_powerpc: *magicp = PPCMAGIC; return TRUE; #endif #if defined(I386MAGIC) || defined(AMD64MAGIC) case bfd_arch_i386: #if defined(I386MAGIC) *magicp = I386MAGIC; #endif #if defined LYNXOS /* Just overwrite the usual value if we're doing Lynx. */ *magicp = LYNXCOFFMAGIC; #endif #if defined AMD64MAGIC *magicp = AMD64MAGIC; #endif return TRUE; #endif #ifdef I860MAGIC case bfd_arch_i860: *magicp = I860MAGIC; return TRUE; #endif #ifdef IA64MAGIC case bfd_arch_ia64: *magicp = IA64MAGIC; return TRUE; #endif #ifdef MC68MAGIC case bfd_arch_m68k: #ifdef APOLLOM68KMAGIC *magicp = APOLLO_COFF_VERSION_NUMBER; #else /* NAMES_HAVE_UNDERSCORE may be defined by coff-u68k.c. */ #ifdef NAMES_HAVE_UNDERSCORE *magicp = MC68KBCSMAGIC; #else *magicp = MC68MAGIC; #endif #endif #ifdef LYNXOS /* Just overwrite the usual value if we're doing Lynx. */ *magicp = LYNXCOFFMAGIC; #endif return TRUE; #endif #ifdef MC88MAGIC case bfd_arch_m88k: *magicp = MC88OMAGIC; return TRUE; #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; case bfd_mach_h8300s: *magicp = H8300SMAGIC; return TRUE; case bfd_mach_h8300hn: *magicp = H8300HNMAGIC; return TRUE; case bfd_mach_h8300sn: *magicp = H8300SNMAGIC; return TRUE; default: break; } break; #endif #ifdef SH_ARCH_MAGIC_BIG case bfd_arch_sh: #ifdef COFF_IMAGE_WITH_PE *magicp = SH_ARCH_MAGIC_WINCE; #else if (bfd_big_endian (abfd)) *magicp = SH_ARCH_MAGIC_BIG; else *magicp = SH_ARCH_MAGIC_LITTLE; #endif return TRUE; #endif #ifdef MIPS_ARCH_MAGIC_WINCE case bfd_arch_mips: *magicp = MIPS_ARCH_MAGIC_WINCE; return TRUE; #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; #endif #ifdef H8500MAGIC case bfd_arch_h8500: *magicp = H8500MAGIC; return TRUE; break; #endif #ifdef WE32KMAGIC case bfd_arch_we32k: *magicp = WE32KMAGIC; return TRUE; #endif #ifdef RS6000COFF_C case bfd_arch_rs6000: #ifndef PPCMAGIC case bfd_arch_powerpc: #endif BFD_ASSERT (bfd_get_flavour (abfd) == bfd_target_xcoff_flavour); *magicp = bfd_xcoff_magic_number (abfd); return TRUE; #endif #ifdef MCOREMAGIC case bfd_arch_mcore: * magicp = MCOREMAGIC; return TRUE; #endif #ifdef W65MAGIC case bfd_arch_w65: *magicp = W65MAGIC; return TRUE; #endif #ifdef OR32_MAGIC_BIG case bfd_arch_or32: if (bfd_big_endian (abfd)) * magicp = OR32_MAGIC_BIG; else * magicp = OR32_MAGIC_LITTLE; return TRUE; #endif #ifdef MAXQ20MAGIC case bfd_arch_maxq: * magicp = MAXQ20MAGIC; switch (bfd_get_mach (abfd)) { case bfd_mach_maxq10: * flagsp = F_MAXQ10; return TRUE; case bfd_mach_maxq20: * flagsp = F_MAXQ20; return TRUE; default: return FALSE; } #endif default: /* Unknown architecture. */ /* Fall through to "return FALSE" below, to avoid "statement never reached" errors on the one below. */ break; } return FALSE; } static bfd_boolean coff_set_arch_mach (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)) return FALSE; /* We can't represent this type. */ return TRUE; /* We're easy... */ } #ifdef COFF_IMAGE_WITH_PE /* This is used to sort sections by VMA, as required by PE image files. */ static int sort_by_secaddr (const void * arg1, const void * arg2) { const asection *a = *(const asection **) arg1; const asection *b = *(const asection **) arg2; if (a->vma < b->vma) return -1; else if (a->vma > b->vma) return 1; return 0; } #endif /* COFF_IMAGE_WITH_PE */ /* Calculate the file position for each section. */ #ifndef I960 #define ALIGN_SECTIONS_IN_FILE #endif #if defined(TIC80COFF) || defined(TICOFF) #undef ALIGN_SECTIONS_IN_FILE #endif static bfd_boolean coff_compute_section_file_positions (bfd * abfd) { asection *current; asection *previous = NULL; file_ptr sofar = bfd_coff_filhsz (abfd); bfd_boolean align_adjust; #ifdef ALIGN_SECTIONS_IN_FILE file_ptr old_sofar; #endif #ifdef RS6000COFF_C /* On XCOFF, if we have symbols, set up the .debug section. */ if (bfd_get_symcount (abfd) > 0) { bfd_size_type sz; bfd_size_type i, symcount; asymbol **symp; sz = 0; symcount = bfd_get_symcount (abfd); for (symp = abfd->outsymbols, i = 0; i < symcount; symp++, i++) { coff_symbol_type *cf; cf = coff_symbol_from (abfd, *symp); if (cf != NULL && cf->native != NULL && SYMNAME_IN_DEBUG (&cf->native->u.syment)) { size_t len; len = strlen (bfd_asymbol_name (*symp)); if (len > SYMNMLEN || bfd_coff_force_symnames_in_strings (abfd)) sz += len + 1 + bfd_coff_debug_string_prefix_length (abfd); } } if (sz > 0) { asection *dsec; dsec = bfd_make_section_old_way (abfd, DOT_DEBUG); if (dsec == NULL) abort (); dsec->size = sz; dsec->flags |= SEC_HAS_CONTENTS; } } #endif #ifdef COFF_IMAGE_WITH_PE int page_size; if (coff_data (abfd)->link_info) { page_size = pe_data (abfd)->pe_opthdr.FileAlignment; /* If no file alignment has been set, default to one. This repairs 'ld -r' for arm-wince-pe target. */ if (page_size == 0) page_size = 1; } else page_size = PE_DEF_FILE_ALIGNMENT; #else #ifdef COFF_PAGE_SIZE int page_size = COFF_PAGE_SIZE; #endif #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 += bfd_coff_aoutsz (abfd); #ifdef RS6000COFF_C else if (xcoff_data (abfd)->full_aouthdr) sofar += bfd_coff_aoutsz (abfd); else sofar += SMALL_AOUTSZ; #endif sofar += abfd->section_count * bfd_coff_scnhsz (abfd); #ifdef RS6000COFF_C /* XCOFF handles overflows in the reloc and line number count fields by allocating a new section header to hold the correct counts. */ for (current = abfd->sections; current != NULL; current = current->next) if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff) sofar += bfd_coff_scnhsz (abfd); #endif #ifdef COFF_IMAGE_WITH_PE { /* PE requires the sections to be in memory order when listed in the section headers. It also does not like empty loadable sections. The sections apparently do not have to be in the right order in the image file itself, but we do need to get the target_index values right. */ unsigned int count; asection **section_list; unsigned int i; int target_index; bfd_size_type amt; count = 0; for (current = abfd->sections; current != NULL; current = current->next) ++count; /* We allocate an extra cell to simplify the final loop. */ amt = sizeof (struct asection *) * (count + 1); section_list = bfd_malloc (amt); if (section_list == NULL) return FALSE; i = 0; for (current = abfd->sections; current != NULL; current = current->next) { section_list[i] = current; ++i; } section_list[i] = NULL; qsort (section_list, count, sizeof (asection *), sort_by_secaddr); /* Rethread the linked list into sorted order; at the same time, assign target_index values. */ target_index = 1; abfd->sections = NULL; abfd->section_last = NULL; for (i = 0; i < count; i++) { current = section_list[i]; bfd_section_list_append (abfd, current); /* Later, if the section has zero size, we'll be throwing it away, so we don't want to number it now. Note that having a zero size and having real contents are different concepts: .bss has no contents, but (usually) non-zero size. */ if (current->size == 0) { /* Discard. However, it still might have (valid) symbols in it, so arbitrarily set it to section 1 (indexing is 1-based here; usually .text). __end__ and other contents of .endsection really have this happen. FIXME: This seems somewhat dubious. */ current->target_index = 1; } else current->target_index = target_index++; } free (section_list); } #else /* ! COFF_IMAGE_WITH_PE */ { /* Set the target_index field. */ int target_index; target_index = 1; for (current = abfd->sections; current != NULL; current = current->next) current->target_index = target_index++; } #endif /* ! COFF_IMAGE_WITH_PE */ align_adjust = FALSE; for (current = abfd->sections; current != NULL; current = current->next) { #ifdef COFF_IMAGE_WITH_PE /* With PE we have to pad each section to be a multiple of its page size too, and remember both sizes. */ if (coff_section_data (abfd, current) == NULL) { bfd_size_type amt = sizeof (struct coff_section_tdata); current->used_by_bfd = bfd_zalloc (abfd, amt); if (current->used_by_bfd == NULL) return FALSE; } if (pei_section_data (abfd, current) == NULL) { bfd_size_type amt = sizeof (struct pei_section_tdata); coff_section_data (abfd, current)->tdata = bfd_zalloc (abfd, amt); if (coff_section_data (abfd, current)->tdata == NULL) return FALSE; } if (pei_section_data (abfd, current)->virt_size == 0) pei_section_data (abfd, current)->virt_size = current->size; #endif /* Only deal with sections which have contents. */ if (!(current->flags & SEC_HAS_CONTENTS)) continue; #ifdef COFF_IMAGE_WITH_PE /* Make sure we skip empty sections in a PE image. */ if (current->size == 0) continue; #endif /* 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... */ #ifdef ALIGN_SECTIONS_IN_FILE if ((abfd->flags & EXEC_P) != 0) { /* Make sure this section is aligned on the right boundary - by padding the previous section up if necessary. */ old_sofar = sofar; #ifdef RS6000COFF_C /* AIX loader checks the text section alignment of (vma - filepos) So even though the filepos may be aligned wrt the o_algntext, for AIX executables, this check fails. This shows up when a native AIX executable is stripped with gnu strip because the default vma of native is 0x10000150 but default for gnu is 0x10000140. Gnu stripped gnu excutable passes this check because the filepos is 0x0140. This problem also show up with 64 bit shared objects. The data section must also be aligned. */ if (!strcmp (current->name, _TEXT) || !strcmp (current->name, _DATA)) { bfd_vma pad; bfd_vma align; sofar = BFD_ALIGN (sofar, 1 << current->alignment_power); align = 1 << current->alignment_power; pad = abs (current->vma - sofar) % align; if (pad) { pad = align - pad; sofar += pad; } } else #else { sofar = BFD_ALIGN (sofar, 1 << current->alignment_power); } #endif if (previous != NULL) previous->size += sofar - old_sofar; } #endif /* In demand paged files the low order bits of the file offset must match the low order bits of the virtual address. */ #ifdef COFF_PAGE_SIZE if ((abfd->flags & D_PAGED) != 0 && (current->flags & SEC_ALLOC) != 0) sofar += (current->vma - (bfd_vma) sofar) % page_size; #endif current->filepos = sofar; #ifdef COFF_IMAGE_WITH_PE /* Set the padded size. */ current->size = (current->size + page_size -1) & -page_size; #endif sofar += current->size; #ifdef ALIGN_SECTIONS_IN_FILE /* Make sure that this section is of the right size too. */ if ((abfd->flags & EXEC_P) == 0) { bfd_size_type old_size; old_size = current->size; current->size = BFD_ALIGN (current->size, 1 << current->alignment_power); align_adjust = current->size != old_size; sofar += current->size - old_size; } else { old_sofar = sofar; sofar = BFD_ALIGN (sofar, 1 << current->alignment_power); align_adjust = sofar != old_sofar; current->size += sofar - old_sofar; } #endif #ifdef COFF_IMAGE_WITH_PE /* For PE we need to make sure we pad out to the aligned size, in case the caller only writes out data to the unaligned size. */ if (pei_section_data (abfd, current)->virt_size < current->size) align_adjust = TRUE; #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; } /* It is now safe to write to the output file. If we needed an alignment adjustment for the last section, then make sure that there is a byte at offset sofar. If there are no symbols and no relocs, then nothing follows the last section. If we don't force the last byte out, then the file may appear to be truncated. */ if (align_adjust) { bfd_byte b; b = 0; if (bfd_seek (abfd, sofar - 1, SEEK_SET) != 0 || bfd_bwrite (&b, (bfd_size_type) 1, abfd) != 1) return FALSE; } /* Make sure the relocations are aligned. We don't need to make sure that this byte exists, because it will only matter if there really are relocs. */ sofar = BFD_ALIGN (sofar, 1 << COFF_DEFAULT_SECTION_ALIGNMENT_POWER); obj_relocbase (abfd) = sofar; abfd->output_has_begun = TRUE; return TRUE; } #ifdef COFF_IMAGE_WITH_PE static unsigned int pelength; static unsigned int peheader; static bfd_boolean coff_read_word (bfd *abfd, unsigned int *value) { unsigned char b[2]; int status; status = bfd_bread (b, (bfd_size_type) 2, abfd); if (status < 1) { *value = 0; return FALSE; } if (status == 1) *value = (unsigned int) b[0]; else *value = (unsigned int) (b[0] + (b[1] << 8)); pelength += (unsigned int) status; return TRUE; } static unsigned int coff_compute_checksum (bfd *abfd) { bfd_boolean more_data; file_ptr filepos; unsigned int value; unsigned int total; total = 0; pelength = 0; filepos = (file_ptr) 0; do { if (bfd_seek (abfd, filepos, SEEK_SET) != 0) return 0; more_data = coff_read_word (abfd, &value); total += value; total = 0xffff & (total + (total >> 0x10)); filepos += 2; } while (more_data); return (0xffff & (total + (total >> 0x10))); } static bfd_boolean coff_apply_checksum (bfd *abfd) { unsigned int computed; unsigned int checksum = 0; if (bfd_seek (abfd, 0x3c, SEEK_SET) != 0) return FALSE; if (!coff_read_word (abfd, &peheader)) return FALSE; if (bfd_seek (abfd, peheader + 0x58, SEEK_SET) != 0) return FALSE; checksum = 0; bfd_bwrite (&checksum, (bfd_size_type) 4, abfd); if (bfd_seek (abfd, peheader, SEEK_SET) != 0) return FALSE; computed = coff_compute_checksum (abfd); checksum = computed + pelength; if (bfd_seek (abfd, peheader + 0x58, SEEK_SET) != 0) return FALSE; bfd_bwrite (&checksum, (bfd_size_type) 4, abfd); return TRUE; } #endif /* COFF_IMAGE_WITH_PE */ static bfd_boolean coff_write_object_contents (bfd * abfd) { asection *current; bfd_boolean hasrelocs = FALSE; bfd_boolean haslinno = FALSE; bfd_boolean hasdebug = FALSE; file_ptr scn_base; file_ptr reloc_base; file_ptr lineno_base; file_ptr sym_base; unsigned long reloc_size = 0, reloc_count = 0; unsigned long lnno_size = 0; bfd_boolean long_section_names; asection *text_sec = NULL; asection *data_sec = NULL; asection *bss_sec = NULL; struct internal_filehdr internal_f; struct internal_aouthdr internal_a; #ifdef COFF_LONG_SECTION_NAMES size_t string_size = STRING_SIZE_SIZE; #endif bfd_set_error (bfd_error_system_call); /* 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) * bfd_coff_linesz (abfd); if (! abfd->output_has_begun) { if (! coff_compute_section_file_positions (abfd)) return FALSE; } reloc_base = obj_relocbase (abfd); /* Work out the size of the reloc and linno areas. */ for (current = abfd->sections; current != NULL; current = current->next) { #ifdef COFF_WITH_PE /* We store the actual reloc count in the first reloc's addr. */ if (obj_pe (abfd) && current->reloc_count >= 0xffff) reloc_count ++; #endif reloc_count += current->reloc_count; } reloc_size = reloc_count * bfd_coff_relsz (abfd); 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->lineno_count) { current->line_filepos = lineno_base; current->moving_line_filepos = lineno_base; lineno_base += current->lineno_count * bfd_coff_linesz (abfd); } else current->line_filepos = 0; if (current->reloc_count) { current->rel_filepos = reloc_base; reloc_base += current->reloc_count * bfd_coff_relsz (abfd); #ifdef COFF_WITH_PE /* Extra reloc to hold real count. */ if (obj_pe (abfd) && current->reloc_count >= 0xffff) reloc_base += bfd_coff_relsz (abfd); #endif } else current->rel_filepos = 0; } /* Write section headers to the file. */ internal_f.f_nscns = 0; if ((abfd->flags & EXEC_P) != 0) scn_base = bfd_coff_filhsz (abfd) + bfd_coff_aoutsz (abfd); else { scn_base = bfd_coff_filhsz (abfd); #ifdef RS6000COFF_C #ifndef XCOFF64 if (xcoff_data (abfd)->full_aouthdr) scn_base += bfd_coff_aoutsz (abfd); else scn_base += SMALL_AOUTSZ; #endif #endif } if (bfd_seek (abfd, scn_base, SEEK_SET) != 0) return FALSE; long_section_names = FALSE; for (current = abfd->sections; current != NULL; current = current->next) { struct internal_scnhdr section; bfd_boolean is_reloc_section = FALSE; #ifdef COFF_IMAGE_WITH_PE if (strcmp (current->name, ".reloc") == 0) { is_reloc_section = TRUE; hasrelocs = TRUE; pe_data (abfd)->has_reloc_section = 1; } #endif internal_f.f_nscns++; strncpy (section.s_name, current->name, SCNNMLEN); #ifdef COFF_LONG_SECTION_NAMES /* Handle long section names as in PE. This must be compatible with the code in coff_write_symbols and _bfd_coff_final_link. */ { size_t len; len = strlen (current->name); if (len > SCNNMLEN) { memset (section.s_name, 0, SCNNMLEN); sprintf (section.s_name, "/%lu", (unsigned long) string_size); string_size += len + 1; long_section_names = TRUE; } } #endif #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->vma; section.s_paddr = current->lma; section.s_size = current->size; #ifdef coff_get_section_load_page section.s_page = coff_get_section_load_page (current); #endif #ifdef COFF_WITH_PE section.s_paddr = 0; #endif #ifdef COFF_IMAGE_WITH_PE /* Reminder: s_paddr holds the virtual size of the section. */ if (coff_section_data (abfd, current) != NULL && pei_section_data (abfd, current) != NULL) section.s_paddr = pei_section_data (abfd, current)->virt_size; else section.s_paddr = 0; #endif /* If this section has no size or is unloadable then the scnptr will be 0 too. */ if (current->size == 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; #ifndef COFF_IMAGE_WITH_PE /* In PEI, relocs come in the .reloc section. */ if (current->reloc_count != 0) hasrelocs = TRUE; #endif if (current->lineno_count != 0) haslinno = TRUE; if ((current->flags & SEC_DEBUGGING) != 0 && ! is_reloc_section) hasdebug = TRUE; #ifdef RS6000COFF_C #ifndef XCOFF64 /* Indicate the use of an XCOFF overflow section header. */ if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff) { section.s_nreloc = 0xffff; section.s_nlnno = 0xffff; } #endif #endif 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; else if (!strcmp (current->name, _BSS)) bss_sec = current; #ifdef I960 section.s_align = (current->alignment_power ? 1 << current->alignment_power : 0); #endif #ifdef TIC80COFF /* TI COFF puts the alignment power in bits 8-11 of the flags. */ section.s_flags |= (current->alignment_power & 0xF) << 8; #endif #ifdef COFF_ENCODE_ALIGNMENT COFF_ENCODE_ALIGNMENT(section, current->alignment_power); #endif #ifdef COFF_IMAGE_WITH_PE /* Suppress output of the sections if they are null. ld includes the bss and data sections even if there is no size assigned to them. NT loader doesn't like it if these section headers are included if the sections themselves are not needed. See also coff_compute_section_file_positions. */ if (section.s_size == 0) internal_f.f_nscns--; else #endif { SCNHDR buff; bfd_size_type amt = bfd_coff_scnhsz (abfd); if (coff_swap_scnhdr_out (abfd, §ion, &buff) == 0 || bfd_bwrite (& buff, amt, abfd) != amt) return FALSE; } #ifdef COFF_WITH_PE /* PE stores COMDAT section information in the symbol table. If this section is supposed to have some COMDAT info, track down the symbol in the symbol table and modify it. */ if ((current->flags & SEC_LINK_ONCE) != 0) { unsigned int i, count; asymbol **psym; coff_symbol_type *csym = NULL; asymbol **psymsec; psymsec = NULL; count = bfd_get_symcount (abfd); for (i = 0, psym = abfd->outsymbols; i < count; i++, psym++) { if ((*psym)->section != current) continue; /* Remember the location of the first symbol in this section. */ if (psymsec == NULL) psymsec = psym; /* See if this is the section symbol. */ if (strcmp ((*psym)->name, current->name) == 0) { csym = coff_symbol_from (abfd, *psym); if (csym == NULL || csym->native == NULL || csym->native->u.syment.n_numaux < 1 || csym->native->u.syment.n_sclass != C_STAT || csym->native->u.syment.n_type != T_NULL) continue; /* Here *PSYM is the section symbol for CURRENT. */ break; } } /* Did we find it? Note that we might not if we're converting the file from some other object file format. */ if (i < count) { combined_entry_type *aux; /* We don't touch the x_checksum field. The x_associated field is not currently supported. */ aux = csym->native + 1; switch (current->flags & SEC_LINK_DUPLICATES) { case SEC_LINK_DUPLICATES_DISCARD: aux->u.auxent.x_scn.x_comdat = IMAGE_COMDAT_SELECT_ANY; break; case SEC_LINK_DUPLICATES_ONE_ONLY: aux->u.auxent.x_scn.x_comdat = IMAGE_COMDAT_SELECT_NODUPLICATES; break; case SEC_LINK_DUPLICATES_SAME_SIZE: aux->u.auxent.x_scn.x_comdat = IMAGE_COMDAT_SELECT_SAME_SIZE; break; case SEC_LINK_DUPLICATES_SAME_CONTENTS: aux->u.auxent.x_scn.x_comdat = IMAGE_COMDAT_SELECT_EXACT_MATCH; break; } /* The COMDAT symbol must be the first symbol from this section in the symbol table. In order to make this work, we move the COMDAT symbol before the first symbol we found in the search above. It's OK to rearrange the symbol table at this point, because coff_renumber_symbols is going to rearrange it further and fix up all the aux entries. */ if (psym != psymsec) { asymbol *hold; asymbol **pcopy; hold = *psym; for (pcopy = psym; pcopy > psymsec; pcopy--) pcopy[0] = pcopy[-1]; *psymsec = hold; } } } #endif /* COFF_WITH_PE */ } #ifdef RS6000COFF_C #ifndef XCOFF64 /* XCOFF handles overflows in the reloc and line number count fields by creating a new section header to hold the correct values. */ for (current = abfd->sections; current != NULL; current = current->next) { if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff) { struct internal_scnhdr scnhdr; SCNHDR buff; bfd_size_type amt; internal_f.f_nscns++; strncpy (&(scnhdr.s_name[0]), current->name, 8); scnhdr.s_paddr = current->reloc_count; scnhdr.s_vaddr = current->lineno_count; scnhdr.s_size = 0; scnhdr.s_scnptr = 0; scnhdr.s_relptr = current->rel_filepos; scnhdr.s_lnnoptr = current->line_filepos; scnhdr.s_nreloc = current->target_index; scnhdr.s_nlnno = current->target_index; scnhdr.s_flags = STYP_OVRFLO; amt = bfd_coff_scnhsz (abfd); if (coff_swap_scnhdr_out (abfd, &scnhdr, &buff) == 0 || bfd_bwrite (& buff, amt, abfd) != amt) return FALSE; } } #endif #endif /* 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; internal_f.f_flags = 0; if (abfd->flags & EXEC_P) internal_f.f_opthdr = bfd_coff_aoutsz (abfd); else { internal_f.f_opthdr = 0; #ifdef RS6000COFF_C #ifndef XCOFF64 if (xcoff_data (abfd)->full_aouthdr) internal_f.f_opthdr = bfd_coff_aoutsz (abfd); else internal_f.f_opthdr = SMALL_AOUTSZ; #endif #endif } if (!hasrelocs) internal_f.f_flags |= F_RELFLG; if (!haslinno) internal_f.f_flags |= F_LNNO; if (abfd->flags & EXEC_P) internal_f.f_flags |= F_EXEC; #ifdef COFF_IMAGE_WITH_PE if (! hasdebug) internal_f.f_flags |= IMAGE_FILE_DEBUG_STRIPPED; if (pe_data (abfd)->real_flags & IMAGE_FILE_LARGE_ADDRESS_AWARE) internal_f.f_flags |= IMAGE_FILE_LARGE_ADDRESS_AWARE; #endif #ifndef COFF_WITH_pex64 #ifdef COFF_WITH_PE internal_f.f_flags |= IMAGE_FILE_32BIT_MACHINE; #else if (bfd_little_endian (abfd)) internal_f.f_flags |= F_AR32WR; else internal_f.f_flags |= F_AR32W; #endif #endif #ifdef TI_TARGET_ID /* Target id is used in TI COFF v1 and later; COFF0 won't use this field, but it doesn't hurt to set it internally. */ internal_f.f_target_id = TI_TARGET_ID; #endif #ifdef TIC80_TARGET_ID internal_f.f_target_id = TIC80_TARGET_ID; #endif /* FIXME, should do something about the other byte orders and architectures. */ #ifdef RS6000COFF_C if ((abfd->flags & DYNAMIC) != 0) internal_f.f_flags |= F_SHROBJ; if (bfd_get_section_by_name (abfd, _LOADER) != NULL) internal_f.f_flags |= F_DYNLOAD; #endif 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 TICOFF_AOUT_MAGIC internal_a.magic = TICOFF_AOUT_MAGIC; #define __A_MAGIC_SET__ #endif #ifdef TIC80COFF internal_a.magic = TIC80_ARCH_MAGIC; #define __A_MAGIC_SET__ #endif /* TIC80 */ #ifdef I860 /* FIXME: What are the a.out magic numbers for the i860? */ internal_a.magic = 0; #define __A_MAGIC_SET__ #endif /* I860 */ #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 defined(M68) || defined(WE32K) || defined(M68K) #define __A_MAGIC_SET__ #if defined(LYNXOS) internal_a.magic = LYNXCOFFMAGIC; #else #if defined(TARG_AUX) internal_a.magic = (abfd->flags & D_PAGED ? PAGEMAGICPEXECPAGED : abfd->flags & WP_TEXT ? PAGEMAGICPEXECSWAPPED : PAGEMAGICEXECSWAPPED); #else #if defined (PAGEMAGICPEXECPAGED) internal_a.magic = PAGEMAGICPEXECPAGED; #endif #endif /* TARG_AUX */ #endif /* LYNXOS */ #endif /* M68 || WE32K || M68K */ #if defined(ARM) #define __A_MAGIC_SET__ internal_a.magic = ZMAGIC; #endif #if defined(PPC_PE) #define __A_MAGIC_SET__ internal_a.magic = IMAGE_NT_OPTIONAL_HDR_MAGIC; #endif #if defined MCORE_PE #define __A_MAGIC_SET__ internal_a.magic = IMAGE_NT_OPTIONAL_HDR_MAGIC; #endif #if defined(I386) #define __A_MAGIC_SET__ #if defined LYNXOS internal_a.magic = LYNXCOFFMAGIC; #elif defined AMD64 internal_a.magic = IMAGE_NT_OPTIONAL_HDR64_MAGIC; #else internal_a.magic = ZMAGIC; #endif #endif /* I386 */ #if defined(IA64) #define __A_MAGIC_SET__ internal_a.magic = PE32PMAGIC; #endif /* IA64 */ #if defined(SPARC) #define __A_MAGIC_SET__ #if defined(LYNXOS) internal_a.magic = LYNXCOFFMAGIC; #endif /* LYNXOS */ #endif /* SPARC */ #ifdef 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 #if defined(SH) && defined(COFF_WITH_PE) #define __A_MAGIC_SET__ internal_a.magic = SH_PE_MAGIC; #endif #if defined(MIPS) && defined(COFF_WITH_PE) #define __A_MAGIC_SET__ internal_a.magic = MIPS_PE_MAGIC; #endif #ifdef OR32 #define __A_MAGIC_SET__ internal_a.magic = NMAGIC; /* Assume separate i/d. */ #endif #ifdef MAXQ20MAGIC #define __A_MAGIC_SET__ internal_a.magic = MAXQ20MAGIC; #endif #ifndef __A_MAGIC_SET__ #include "Your aouthdr magic number is not being set!" #else #undef __A_MAGIC_SET__ #endif } /* FIXME: Does anybody ever set this to another value? */ internal_a.vstamp = 0; /* Now should write relocs, strings, syms. */ obj_sym_filepos (abfd) = sym_base; if (bfd_get_symcount (abfd) != 0) { int firstundef; if (!coff_renumber_symbols (abfd, &firstundef)) 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, firstundef)) return FALSE; } #ifdef COFF_LONG_SECTION_NAMES else if (long_section_names && ! obj_coff_strings_written (abfd)) { /* If we have long section names we have to write out the string table even if there are no symbols. */ if (! coff_write_symbols (abfd)) return FALSE; } #endif #ifdef COFF_IMAGE_WITH_PE #ifdef PPC_PE else if ((abfd->flags & EXEC_P) != 0) { bfd_byte b; /* PowerPC PE appears to require that all executable files be rounded up to the page size. */ b = 0; if (bfd_seek (abfd, (file_ptr) BFD_ALIGN (sym_base, COFF_PAGE_SIZE) - 1, SEEK_SET) != 0 || bfd_bwrite (&b, (bfd_size_type) 1, abfd) != 1) return FALSE; } #endif #endif /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF backend linker, and obj_raw_syment_count is not valid until after coff_write_symbols is called. */ if (obj_raw_syment_count (abfd) != 0) { internal_f.f_symptr = sym_base; #ifdef RS6000COFF_C /* AIX appears to require that F_RELFLG not be set if there are local symbols but no relocations. */ internal_f.f_flags &=~ F_RELFLG; #endif } else { if (long_section_names) internal_f.f_symptr = sym_base; else internal_f.f_symptr = 0; internal_f.f_flags |= F_LSYMS; } if (text_sec) { internal_a.tsize = text_sec->size; internal_a.text_start = internal_a.tsize ? text_sec->vma : 0; } if (data_sec) { internal_a.dsize = data_sec->size; internal_a.data_start = internal_a.dsize ? data_sec->vma : 0; } if (bss_sec) { internal_a.bsize = bss_sec->size; if (internal_a.bsize && bss_sec->vma < internal_a.data_start) internal_a.data_start = bss_sec->vma; } internal_a.entry = bfd_get_start_address (abfd); internal_f.f_nsyms = obj_raw_syment_count (abfd); #ifdef RS6000COFF_C if (xcoff_data (abfd)->full_aouthdr) { bfd_vma toc; asection *loader_sec; internal_a.vstamp = 1; internal_a.o_snentry = xcoff_data (abfd)->snentry; if (internal_a.o_snentry == 0) internal_a.entry = (bfd_vma) -1; if (text_sec != NULL) { internal_a.o_sntext = text_sec->target_index; internal_a.o_algntext = bfd_get_section_alignment (abfd, text_sec); } else { internal_a.o_sntext = 0; internal_a.o_algntext = 0; } if (data_sec != NULL) { internal_a.o_sndata = data_sec->target_index; internal_a.o_algndata = bfd_get_section_alignment (abfd, data_sec); } else { internal_a.o_sndata = 0; internal_a.o_algndata = 0; } loader_sec = bfd_get_section_by_name (abfd, ".loader"); if (loader_sec != NULL) internal_a.o_snloader = loader_sec->target_index; else internal_a.o_snloader = 0; if (bss_sec != NULL) internal_a.o_snbss = bss_sec->target_index; else internal_a.o_snbss = 0; toc = xcoff_data (abfd)->toc; internal_a.o_toc = toc; internal_a.o_sntoc = xcoff_data (abfd)->sntoc; internal_a.o_modtype = xcoff_data (abfd)->modtype; if (xcoff_data (abfd)->cputype != -1) internal_a.o_cputype = xcoff_data (abfd)->cputype; else { switch (bfd_get_arch (abfd)) { case bfd_arch_rs6000: internal_a.o_cputype = 4; break; case bfd_arch_powerpc: if (bfd_get_mach (abfd) == bfd_mach_ppc) internal_a.o_cputype = 3; else internal_a.o_cputype = 1; break; default: abort (); } } internal_a.o_maxstack = xcoff_data (abfd)->maxstack; internal_a.o_maxdata = xcoff_data (abfd)->maxdata; } #endif /* Now write them. */ if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) return FALSE; { char * buff; bfd_size_type amount = bfd_coff_filhsz (abfd); buff = bfd_malloc (amount); if (buff == NULL) return FALSE; bfd_coff_swap_filehdr_out (abfd, & internal_f, buff); amount = bfd_bwrite (buff, amount, abfd); free (buff); if (amount != bfd_coff_filhsz (abfd)) return FALSE; } if (abfd->flags & EXEC_P) { /* Note that peicode.h fills in a PEAOUTHDR, not an AOUTHDR. include/coff/pe.h sets AOUTSZ == sizeof (PEAOUTHDR)). */ char * buff; bfd_size_type amount = bfd_coff_aoutsz (abfd); buff = bfd_malloc (amount); if (buff == NULL) return FALSE; coff_swap_aouthdr_out (abfd, & internal_a, buff); amount = bfd_bwrite (buff, amount, abfd); free (buff); if (amount != bfd_coff_aoutsz (abfd)) return FALSE; #ifdef COFF_IMAGE_WITH_PE if (! coff_apply_checksum (abfd)) return FALSE; #endif } #ifdef RS6000COFF_C else { AOUTHDR buff; size_t size; /* XCOFF seems to always write at least a small a.out header. */ coff_swap_aouthdr_out (abfd, & internal_a, & buff); if (xcoff_data (abfd)->full_aouthdr) size = bfd_coff_aoutsz (abfd); else size = SMALL_AOUTSZ; if (bfd_bwrite (& buff, (bfd_size_type) size, abfd) != size) return FALSE; } #endif return TRUE; } static bfd_boolean coff_set_section_contents (bfd * abfd, sec_ptr section, const void * location, file_ptr offset, bfd_size_type count) { if (! abfd->output_has_begun) /* Set by bfd.c handler. */ { if (! coff_compute_section_file_positions (abfd)) return FALSE; } #if defined(_LIB) && !defined(TARG_AUX) /* The physical address field of a .lib section is used to hold the number of shared libraries in the section. This code counts the number of sections being written, and increments the lma field with the number. I have found no documentation on the contents of this section. Experimentation indicates that the section contains zero or more records, each of which has the following structure: - a (four byte) word holding the length of this record, in words, - a word that always seems to be set to "2", - the path to a shared library, null-terminated and then padded to a whole word boundary. bfd_assert calls have been added to alert if an attempt is made to write a section which doesn't follow these assumptions. The code has been tested on ISC 4.1 by me, and on SCO by Robert Lipe <robertl@arnet.com> (Thanks!). Gvran Uddeborg <gvran@uddeborg.pp.se>. */ if (strcmp (section->name, _LIB) == 0) { bfd_byte *rec, *recend; rec = (bfd_byte *) location; recend = rec + count; while (rec < recend) { ++section->lma; rec += bfd_get_32 (abfd, rec) * 4; } BFD_ASSERT (rec == recend); } #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, section->filepos + offset, SEEK_SET) != 0) return FALSE; if (count == 0) return TRUE; return bfd_bwrite (location, count, abfd) == count; } static void * buy_and_read (bfd *abfd, file_ptr where, bfd_size_type size) { void * area = bfd_alloc (abfd, size); if (!area) return (NULL); if (bfd_seek (abfd, where, SEEK_SET) != 0 || bfd_bread (area, size, abfd) != size) return (NULL); return (area); } /* 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. Note: The PE format uses line number 0 for a flag indicating a new source file. 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 int coff_sort_func_alent (const void * arg1, const void * arg2) { const alent *al1 = *(const alent **) arg1; const alent *al2 = *(const alent **) arg2; const coff_symbol_type *s1 = (const coff_symbol_type *) (al1->u.sym); const coff_symbol_type *s2 = (const coff_symbol_type *) (al2->u.sym); if (s1->symbol.value < s2->symbol.value) return -1; else if (s1->symbol.value > s2->symbol.value) return 1; return 0; } static bfd_boolean coff_slurp_line_table (bfd *abfd, asection *asect) { LINENO *native_lineno; alent *lineno_cache; bfd_size_type amt; unsigned int counter; alent *cache_ptr; bfd_vma prev_offset = 0; int ordered = 1; unsigned int nbr_func; LINENO *src; BFD_ASSERT (asect->lineno == NULL); amt = (bfd_size_type) bfd_coff_linesz (abfd) * asect->lineno_count; native_lineno = (LINENO *) buy_and_read (abfd, asect->line_filepos, amt); if (native_lineno == NULL) { (*_bfd_error_handler) (_("%B: warning: line number table read failed"), abfd); return FALSE; } amt = ((bfd_size_type) asect->lineno_count + 1) * sizeof (alent); lineno_cache = bfd_alloc (abfd, amt); if (lineno_cache == NULL) return FALSE; cache_ptr = lineno_cache; src = native_lineno; nbr_func = 0; for (counter = 0; counter < asect->lineno_count; counter++) { struct internal_lineno dst; bfd_coff_swap_lineno_in (abfd, src, &dst); cache_ptr->line_number = dst.l_lnno; if (cache_ptr->line_number == 0) { bfd_boolean warned; bfd_signed_vma symndx; coff_symbol_type *sym; nbr_func++; warned = FALSE; symndx = dst.l_addr.l_symndx; if (symndx < 0 || (bfd_vma) symndx >= obj_raw_syment_count (abfd)) { (*_bfd_error_handler) (_("%B: warning: illegal symbol index %ld in line numbers"), abfd, dst.l_addr.l_symndx); symndx = 0; warned = TRUE; } /* FIXME: We should not be casting between ints and pointers like this. */ sym = ((coff_symbol_type *) ((symndx + obj_raw_syments (abfd)) ->u.syment._n._n_n._n_zeroes)); cache_ptr->u.sym = (asymbol *) sym; if (sym->lineno != NULL && ! warned) (*_bfd_error_handler) (_("%B: warning: duplicate line number information for `%s'"), abfd, bfd_asymbol_name (&sym->symbol)); sym->lineno = cache_ptr; if (sym->symbol.value < prev_offset) ordered = 0; prev_offset = sym->symbol.value; } else cache_ptr->u.offset = dst.l_addr.l_paddr - bfd_section_vma (abfd, asect); cache_ptr++; src++; } cache_ptr->line_number = 0; /* On some systems (eg AIX5.3) the lineno table may not be sorted. */ if (!ordered) { /* Sort the table. */ alent **func_table; alent *n_lineno_cache; /* Create a table of functions. */ func_table = bfd_malloc (nbr_func * sizeof (alent *)); if (func_table != NULL) { alent **p = func_table; unsigned int i; for (i = 0; i < counter; i++) if (lineno_cache[i].line_number == 0) *p++ = &lineno_cache[i]; /* Sort by functions. */ qsort (func_table, nbr_func, sizeof (alent *), coff_sort_func_alent); /* Create the new sorted table. */ n_lineno_cache = bfd_alloc (abfd, amt); if (n_lineno_cache != NULL) { alent *n_cache_ptr = n_lineno_cache; for (i = 0; i < nbr_func; i++) { coff_symbol_type *sym; alent *old_ptr = func_table[i]; /* Copy the function entry and update it. */ *n_cache_ptr = *old_ptr; sym = (coff_symbol_type *)n_cache_ptr->u.sym; sym->lineno = n_cache_ptr; n_cache_ptr++; old_ptr++; /* Copy the line number entries. */ while (old_ptr->line_number != 0) *n_cache_ptr++ = *old_ptr++; } n_cache_ptr->line_number = 0; bfd_release (abfd, lineno_cache); lineno_cache = n_lineno_cache; } free (func_table); } } asect->lineno = lineno_cache; bfd_release (abfd, native_lineno); return TRUE; } /* Slurp in the symbol table, converting it to generic form. Note that if coff_relocate_section is defined, the linker will read symbols via coff_link_add_symbols, rather than via this routine. */ static bfd_boolean coff_slurp_symbol_table (bfd * abfd) { combined_entry_type *native_symbols; coff_symbol_type *cached_area; unsigned int *table_ptr; bfd_size_type amt; unsigned int number_of_symbols = 0; if (obj_symbols (abfd)) return TRUE; /* Read in the symbol table. */ if ((native_symbols = coff_get_normalized_symtab (abfd)) == NULL) return FALSE; /* Allocate enough room for all the symbols in cached form. */ amt = obj_raw_syment_count (abfd); amt *= sizeof (coff_symbol_type); cached_area = bfd_alloc (abfd, amt); if (cached_area == NULL) return FALSE; amt = obj_raw_syment_count (abfd); amt *= sizeof (unsigned int); table_ptr = bfd_alloc (abfd, amt); if (table_ptr == NULL) return FALSE; else { coff_symbol_type *dst = cached_area; unsigned int last_native_index = obj_raw_syment_count (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 = (bfd_hostptr_t) 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: /* Fall through to next case. */ #endif case C_EXT: case C_WEAKEXT: #if defined ARM case C_THUMBEXT: case C_THUMBEXTFUNC: #endif #ifdef RS6000COFF_C case C_HIDEXT: #endif #ifdef C_SYSTEM case C_SYSTEM: /* System Wide variable. */ #endif #ifdef COFF_WITH_PE /* In PE, 0x68 (104) denotes a section symbol. */ case C_SECTION: /* In PE, 0x69 (105) denotes a weak external symbol. */ case C_NT_WEAK: #endif switch (coff_classify_symbol (abfd, &src->u.syment)) { case COFF_SYMBOL_GLOBAL: dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL; #if defined COFF_WITH_PE /* PE sets the symbol to a value relative to the start of the section. */ dst->symbol.value = src->u.syment.n_value; #else dst->symbol.value = (src->u.syment.n_value - dst->symbol.section->vma); #endif 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 | BSF_FUNCTION; break; case COFF_SYMBOL_COMMON: dst->symbol.section = bfd_com_section_ptr; dst->symbol.value = src->u.syment.n_value; break; case COFF_SYMBOL_UNDEFINED: dst->symbol.section = bfd_und_section_ptr; dst->symbol.value = 0; break; case COFF_SYMBOL_PE_SECTION: dst->symbol.flags |= BSF_EXPORT | BSF_SECTION_SYM; dst->symbol.value = 0; break; case COFF_SYMBOL_LOCAL: dst->symbol.flags = BSF_LOCAL; #if defined COFF_WITH_PE /* PE sets the symbol to a value relative to the start of the section. */ dst->symbol.value = src->u.syment.n_value; #else dst->symbol.value = (src->u.syment.n_value - dst->symbol.section->vma); #endif if (ISFCN ((src->u.syment.n_type))) dst->symbol.flags |= BSF_NOT_AT_END | BSF_FUNCTION; break; } #ifdef RS6000COFF_C /* A symbol with a csect entry should not go at the end. */ if (src->u.syment.n_numaux > 0) dst->symbol.flags |= BSF_NOT_AT_END; #endif #ifdef COFF_WITH_PE if (src->u.syment.n_sclass == C_NT_WEAK) dst->symbol.flags |= BSF_WEAK; if (src->u.syment.n_sclass == C_SECTION && src->u.syment.n_scnum > 0) dst->symbol.flags = BSF_LOCAL; #endif if (src->u.syment.n_sclass == C_WEAKEXT) dst->symbol.flags |= BSF_WEAK; break; case C_STAT: /* Static. */ #ifdef I960 case C_LEAFSTAT: /* Static leaf procedure. */ #endif #if defined ARM case C_THUMBSTAT: /* Thumb static. */ case C_THUMBLABEL: /* Thumb label. */ case C_THUMBSTATFUNC:/* Thumb static function. */ #endif case C_LABEL: /* Label. */ if (src->u.syment.n_scnum == N_DEBUG) 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) { #if defined COFF_WITH_PE /* PE sets the symbol to a value relative to the start of the section. */ dst->symbol.value = src->u.syment.n_value; #else dst->symbol.value = (src->u.syment.n_value - dst->symbol.section->vma); #endif } else dst->symbol.value = src->u.syment.n_value; break; case C_MOS: /* Member of structure. */ case C_EOS: /* End of structure. */ case C_REGPARM: /* Register parameter. */ case C_REG: /* register variable. */ /* C_AUTOARG conflicts with TI COFF C_UEXT. */ #if !defined (TIC80COFF) && !defined (TICOFF) #ifdef C_AUTOARG case C_AUTOARG: /* 960-specific storage class. */ #endif #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_GSYM: case C_LSYM: case C_PSYM: case C_RSYM: case C_RPSYM: case C_STSYM: case C_TCSYM: case C_BCOMM: case C_ECOML: case C_ECOMM: 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_BINCL: /* Beginning of include file. */ case C_EINCL: /* Ending of include file. */ /* The value is actually a pointer into the line numbers of the file. We locate the line number entry, and set the section to the section which contains it, and the value to the index in that section. */ { asection *sec; dst->symbol.flags = BSF_DEBUGGING; for (sec = abfd->sections; sec != NULL; sec = sec->next) if (sec->line_filepos <= (file_ptr) src->u.syment.n_value && ((file_ptr) (sec->line_filepos + sec->lineno_count * bfd_coff_linesz (abfd)) > (file_ptr) src->u.syment.n_value)) break; if (sec == NULL) dst->symbol.value = 0; else { dst->symbol.section = sec; dst->symbol.value = ((src->u.syment.n_value - sec->line_filepos) / bfd_coff_linesz (abfd)); src->fix_line = 1; } } break; case C_BSTAT: dst->symbol.flags = BSF_DEBUGGING; /* 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); dst->symbol.value = src->u.syment.n_value; src->fix_value = 1; break; #endif case C_BLOCK: /* ".bb" or ".eb". */ case C_FCN: /* ".bf" or ".ef" (or PE ".lf"). */ case C_EFCN: /* Physical end of function. */ #if defined COFF_WITH_PE /* PE sets the symbol to a value relative to the start of the section. */ dst->symbol.value = src->u.syment.n_value; if (strcmp (dst->symbol.name, ".bf") != 0) { /* PE uses funny values for .ef and .lf; don't relocate them. */ dst->symbol.flags = BSF_DEBUGGING; } else dst->symbol.flags = BSF_DEBUGGING | BSF_DEBUGGING_RELOC; #else /* Base the value as an index from the base of the section. */ dst->symbol.flags = BSF_LOCAL; dst->symbol.value = (src->u.syment.n_value - dst->symbol.section->vma); #endif break; case C_STATLAB: /* Static load time label. */ dst->symbol.value = src->u.syment.n_value; dst->symbol.flags = BSF_GLOBAL; break; case C_NULL: /* PE DLLs sometimes have zeroed out symbols for some reason. Just ignore them without a warning. */ if (src->u.syment.n_type == 0 && src->u.syment.n_value == 0 && src->u.syment.n_scnum == 0) break; /* Fall through. */ case C_EXTDEF: /* External definition. */ case C_ULABEL: /* Undefined label. */ case C_USTATIC: /* Undefined static. */ #ifndef COFF_WITH_PE /* C_LINE in regular coff is 0x68. NT has taken over this storage class to represent a section symbol. */ case C_LINE: /* line # reformatted as symbol table entry. */ /* NT uses 0x67 for a weak symbol, not C_ALIAS. */ case C_ALIAS: /* Duplicate tag. */ #endif /* New storage classes for TI COFF. */ #if defined(TIC80COFF) || defined(TICOFF) case C_UEXT: /* Tentative external definition. */ #endif case C_EXTLAB: /* External load time label. */ case C_HIDDEN: /* Ext symbol in dmert public lib. */ default: (*_bfd_error_handler) (_("%B: Unrecognized storage class %d for %s symbol `%s'"), abfd, src->u.syment.n_sclass, dst->symbol.section->name, dst->symbol.name); dst->symbol.flags = BSF_DEBUGGING; dst->symbol.value = (src->u.syment.n_value); break; } dst->native = src; dst->symbol.udata.i = 0; dst->lineno = NULL; this_index += (src->u.syment.n_numaux) + 1; dst++; number_of_symbols++; } } obj_symbols (abfd) = cached_area; obj_raw_syments (abfd) = native_symbols; 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; } /* Classify a COFF symbol. A couple of targets have globally visible symbols which are not class C_EXT, and this handles those. It also recognizes some special PE cases. */ static enum coff_symbol_classification coff_classify_symbol (bfd *abfd, struct internal_syment *syment) { /* FIXME: This partially duplicates the switch in coff_slurp_symbol_table. */ switch (syment->n_sclass) { case C_EXT: case C_WEAKEXT: #ifdef I960 case C_LEAFEXT: #endif #ifdef ARM case C_THUMBEXT: case C_THUMBEXTFUNC: #endif #ifdef C_SYSTEM case C_SYSTEM: #endif #ifdef COFF_WITH_PE case C_NT_WEAK: #endif if (syment->n_scnum == 0) { if (syment->n_value == 0) return COFF_SYMBOL_UNDEFINED; else return COFF_SYMBOL_COMMON; } return COFF_SYMBOL_GLOBAL; default: break; } #ifdef COFF_WITH_PE if (syment->n_sclass == C_STAT) { if (syment->n_scnum == 0) /* The Microsoft compiler sometimes generates these if a small static function is inlined every time it is used. The function is discarded, but the symbol table entry remains. */ return COFF_SYMBOL_LOCAL; #ifdef STRICT_PE_FORMAT /* This is correct for Microsoft generated objects, but it breaks gas generated objects. */ if (syment->n_value == 0) { asection *sec; char buf[SYMNMLEN + 1]; sec = coff_section_from_bfd_index (abfd, syment->n_scnum); if (sec != NULL && (strcmp (bfd_get_section_name (abfd, sec), _bfd_coff_internal_syment_name (abfd, syment, buf)) == 0)) return COFF_SYMBOL_PE_SECTION; } #endif return COFF_SYMBOL_LOCAL; } if (syment->n_sclass == C_SECTION) { /* In some cases in a DLL generated by the Microsoft linker, the n_value field will contain garbage. FIXME: This should probably be handled by the swapping function instead. */ syment->n_value = 0; if (syment->n_scnum == 0) return COFF_SYMBOL_UNDEFINED; return COFF_SYMBOL_PE_SECTION; } #endif /* COFF_WITH_PE */ /* If it is not a global symbol, we presume it is a local symbol. */ if (syment->n_scnum == 0) { char buf[SYMNMLEN + 1]; (*_bfd_error_handler) (_("warning: %B: local symbol `%s' has no section"), abfd, _bfd_coff_internal_syment_name (abfd, syment, buf)); } return COFF_SYMBOL_LOCAL; } /* 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 = 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 != NULL \ && coffsym->native->u.syment.n_scnum == 0) \ cache_ptr->addend = 0; \ else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ && ptr->section != NULL) \ cache_ptr->addend = - (ptr->section->vma + ptr->value); \ else \ cache_ptr->addend = 0; \ } #endif static bfd_boolean coff_slurp_reloc_table (bfd * abfd, sec_ptr asect, asymbol ** symbols) { RELOC *native_relocs; arelent *reloc_cache; arelent *cache_ptr; unsigned int idx; bfd_size_type amt; 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; amt = (bfd_size_type) bfd_coff_relsz (abfd) * asect->reloc_count; native_relocs = (RELOC *) buy_and_read (abfd, asect->rel_filepos, amt); amt = (bfd_size_type) asect->reloc_count * sizeof (arelent); reloc_cache = bfd_alloc (abfd, amt); if (reloc_cache == NULL || native_relocs == NULL) return FALSE; for (idx = 0; idx < asect->reloc_count; idx++) { struct internal_reloc dst; struct external_reloc *src; #ifndef RELOC_PROCESSING asymbol *ptr; #endif cache_ptr = reloc_cache + idx; src = native_relocs + idx; dst.r_offset = 0; coff_swap_reloc_in (abfd, src, &dst); #ifdef RELOC_PROCESSING RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); #else cache_ptr->address = dst.r_vaddr; if (dst.r_symndx != -1) { if (dst.r_symndx < 0 || dst.r_symndx >= obj_conv_table_size (abfd)) { (*_bfd_error_handler) (_("%B: warning: illegal symbol index %ld in relocs"), abfd, dst.r_symndx); cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; ptr = NULL; } else { 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 = NULL; } /* 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 = NULL;*/ /* Fill in the cache_ptr->howto field from dst.r_type. */ RTYPE2HOWTO (cache_ptr, &dst); #endif /* RELOC_PROCESSING */ if (cache_ptr->howto == NULL) { (*_bfd_error_handler) (_("%B: illegal relocation type %d at address 0x%lx"), abfd, dst.r_type, (long) dst.r_vaddr); bfd_set_error (bfd_error_bad_value); return FALSE; } } asect->relocation = reloc_cache; return TRUE; } #ifndef coff_rtype_to_howto #ifdef RTYPE2HOWTO /* Get the howto structure for a reloc. This is only used if the file including this one defines coff_relocate_section to be _bfd_coff_generic_relocate_section, so it is OK if it does not always work. It is the responsibility of the including file to make sure it is reasonable if it is needed. */ static reloc_howto_type * coff_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, asection *sec ATTRIBUTE_UNUSED, struct internal_reloc *rel, struct coff_link_hash_entry *h ATTRIBUTE_UNUSED, struct internal_syment *sym ATTRIBUTE_UNUSED, bfd_vma *addendp ATTRIBUTE_UNUSED) { arelent genrel; genrel.howto = NULL; RTYPE2HOWTO (&genrel, rel); return genrel.howto; } #else /* ! defined (RTYPE2HOWTO) */ #define coff_rtype_to_howto NULL #endif /* ! defined (RTYPE2HOWTO) */ #endif /* ! defined (coff_rtype_to_howto) */ /* This is stupid. This function should be a boolean predicate. */ static long coff_canonicalize_reloc (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; } #ifndef coff_reloc16_estimate #define coff_reloc16_estimate dummy_reloc16_estimate static int dummy_reloc16_estimate (bfd *abfd ATTRIBUTE_UNUSED, asection *input_section ATTRIBUTE_UNUSED, arelent *reloc ATTRIBUTE_UNUSED, unsigned int shrink ATTRIBUTE_UNUSED, struct bfd_link_info *link_info ATTRIBUTE_UNUSED) { abort (); return 0; } #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 (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_info *link_info ATTRIBUTE_UNUSED, struct bfd_link_order *link_order ATTRIBUTE_UNUSED, arelent *reloc ATTRIBUTE_UNUSED, bfd_byte *data ATTRIBUTE_UNUSED, unsigned int *src_ptr ATTRIBUTE_UNUSED, unsigned int *dst_ptr ATTRIBUTE_UNUSED) { abort (); } #endif #ifndef coff_bfd_link_hash_table_free #define coff_bfd_link_hash_table_free _bfd_generic_link_hash_table_free #endif /* If coff_relocate_section is defined, we can use the optimized COFF backend linker. Otherwise we must continue to use the old linker. */ #ifdef coff_relocate_section #ifndef coff_bfd_link_hash_table_create #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create #endif #ifndef coff_bfd_link_add_symbols #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols #endif #ifndef coff_bfd_final_link #define coff_bfd_final_link _bfd_coff_final_link #endif #else /* ! defined (coff_relocate_section) */ #define coff_relocate_section NULL #ifndef coff_bfd_link_hash_table_create #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create #endif #ifndef coff_bfd_link_add_symbols #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols #endif #define coff_bfd_final_link _bfd_generic_final_link #endif /* ! defined (coff_relocate_section) */ #define coff_bfd_link_just_syms _bfd_generic_link_just_syms #define coff_bfd_link_split_section _bfd_generic_link_split_section #ifndef coff_start_final_link #define coff_start_final_link NULL #endif #ifndef coff_adjust_symndx #define coff_adjust_symndx NULL #endif #ifndef coff_link_add_one_symbol #define coff_link_add_one_symbol _bfd_generic_link_add_one_symbol #endif #ifndef coff_link_output_has_begun static bfd_boolean coff_link_output_has_begun (bfd * abfd, struct coff_final_link_info * info ATTRIBUTE_UNUSED) { return abfd->output_has_begun; } #endif #ifndef coff_final_link_postscript static bfd_boolean coff_final_link_postscript (bfd * abfd ATTRIBUTE_UNUSED, struct coff_final_link_info * pfinfo ATTRIBUTE_UNUSED) { return TRUE; } #endif #ifndef coff_SWAP_aux_in #define coff_SWAP_aux_in coff_swap_aux_in #endif #ifndef coff_SWAP_sym_in #define coff_SWAP_sym_in coff_swap_sym_in #endif #ifndef coff_SWAP_lineno_in #define coff_SWAP_lineno_in coff_swap_lineno_in #endif #ifndef coff_SWAP_aux_out #define coff_SWAP_aux_out coff_swap_aux_out #endif #ifndef coff_SWAP_sym_out #define coff_SWAP_sym_out coff_swap_sym_out #endif #ifndef coff_SWAP_lineno_out #define coff_SWAP_lineno_out coff_swap_lineno_out #endif #ifndef coff_SWAP_reloc_out #define coff_SWAP_reloc_out coff_swap_reloc_out #endif #ifndef coff_SWAP_filehdr_out #define coff_SWAP_filehdr_out coff_swap_filehdr_out #endif #ifndef coff_SWAP_aouthdr_out #define coff_SWAP_aouthdr_out coff_swap_aouthdr_out #endif #ifndef coff_SWAP_scnhdr_out #define coff_SWAP_scnhdr_out coff_swap_scnhdr_out #endif #ifndef coff_SWAP_reloc_in #define coff_SWAP_reloc_in coff_swap_reloc_in #endif #ifndef coff_SWAP_filehdr_in #define coff_SWAP_filehdr_in coff_swap_filehdr_in #endif #ifndef coff_SWAP_aouthdr_in #define coff_SWAP_aouthdr_in coff_swap_aouthdr_in #endif #ifndef coff_SWAP_scnhdr_in #define coff_SWAP_scnhdr_in coff_swap_scnhdr_in #endif static const bfd_coff_backend_data bfd_coff_std_swap_table ATTRIBUTE_UNUSED = { 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, RELSZ, LINESZ, FILNMLEN, #ifdef COFF_LONG_FILENAMES TRUE, #else FALSE, #endif #ifdef COFF_LONG_SECTION_NAMES TRUE, #else FALSE, #endif COFF_DEFAULT_SECTION_ALIGNMENT_POWER, #ifdef COFF_FORCE_SYMBOLS_IN_STRINGS TRUE, #else FALSE, #endif #ifdef COFF_DEBUG_STRING_WIDE_PREFIX 4, #else 2, #endif coff_SWAP_filehdr_in, coff_SWAP_aouthdr_in, coff_SWAP_scnhdr_in, coff_SWAP_reloc_in, coff_bad_format_hook, coff_set_arch_mach_hook, coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook, coff_slurp_symbol_table, symname_in_debug_hook, coff_pointerize_aux_hook, coff_print_aux, coff_reloc16_extra_cases, coff_reloc16_estimate, coff_classify_symbol, coff_compute_section_file_positions, coff_start_final_link, coff_relocate_section, coff_rtype_to_howto, coff_adjust_symndx, coff_link_add_one_symbol, coff_link_output_has_begun, coff_final_link_postscript }; #ifdef TICOFF /* COFF0 differs in file/section header size and relocation entry size. */ static const bfd_coff_backend_data ticoff0_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_V0, AOUTSZ, SCNHSZ_V01, SYMESZ, AUXESZ, RELSZ_V0, LINESZ, FILNMLEN, #ifdef COFF_LONG_FILENAMES TRUE, #else FALSE, #endif #ifdef COFF_LONG_SECTION_NAMES TRUE, #else FALSE, #endif COFF_DEFAULT_SECTION_ALIGNMENT_POWER, #ifdef COFF_FORCE_SYMBOLS_IN_STRINGS TRUE, #else FALSE, #endif #ifdef COFF_DEBUG_STRING_WIDE_PREFIX 4, #else 2, #endif coff_SWAP_filehdr_in, coff_SWAP_aouthdr_in, coff_SWAP_scnhdr_in, coff_SWAP_reloc_in, ticoff0_bad_format_hook, coff_set_arch_mach_hook, coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook, coff_slurp_symbol_table, symname_in_debug_hook, coff_pointerize_aux_hook, coff_print_aux, coff_reloc16_extra_cases, coff_reloc16_estimate, coff_classify_symbol, coff_compute_section_file_positions, coff_start_final_link, coff_relocate_section, coff_rtype_to_howto, coff_adjust_symndx, coff_link_add_one_symbol, coff_link_output_has_begun, coff_final_link_postscript }; #endif #ifdef TICOFF /* COFF1 differs in section header size. */ static const bfd_coff_backend_data ticoff1_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_V01, SYMESZ, AUXESZ, RELSZ, LINESZ, FILNMLEN, #ifdef COFF_LONG_FILENAMES TRUE, #else FALSE, #endif #ifdef COFF_LONG_SECTION_NAMES TRUE, #else FALSE, #endif COFF_DEFAULT_SECTION_ALIGNMENT_POWER, #ifdef COFF_FORCE_SYMBOLS_IN_STRINGS TRUE, #else FALSE, #endif #ifdef COFF_DEBUG_STRING_WIDE_PREFIX 4, #else 2, #endif coff_SWAP_filehdr_in, coff_SWAP_aouthdr_in, coff_SWAP_scnhdr_in, coff_SWAP_reloc_in, ticoff1_bad_format_hook, coff_set_arch_mach_hook, coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook, coff_slurp_symbol_table, symname_in_debug_hook, coff_pointerize_aux_hook, coff_print_aux, coff_reloc16_extra_cases, coff_reloc16_estimate, coff_classify_symbol, coff_compute_section_file_positions, coff_start_final_link, coff_relocate_section, coff_rtype_to_howto, coff_adjust_symndx, coff_link_add_one_symbol, coff_link_output_has_begun, coff_final_link_postscript }; #endif #ifndef coff_close_and_cleanup #define coff_close_and_cleanup _bfd_generic_close_and_cleanup #endif #ifndef coff_bfd_free_cached_info #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info #endif #ifndef coff_get_section_contents #define coff_get_section_contents _bfd_generic_get_section_contents #endif #ifndef coff_bfd_copy_private_symbol_data #define coff_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data #endif #ifndef coff_bfd_copy_private_header_data #define coff_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data #endif #ifndef coff_bfd_copy_private_section_data #define coff_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data #endif #ifndef coff_bfd_copy_private_bfd_data #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data #endif #ifndef coff_bfd_merge_private_bfd_data #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data #endif #ifndef coff_bfd_set_private_flags #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags #endif #ifndef coff_bfd_print_private_bfd_data #define coff_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data #endif #ifndef coff_bfd_is_local_label_name #define coff_bfd_is_local_label_name _bfd_coff_is_local_label_name #endif #ifndef coff_bfd_is_target_special_symbol #define coff_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) #endif #ifndef coff_read_minisymbols #define coff_read_minisymbols _bfd_generic_read_minisymbols #endif #ifndef coff_minisymbol_to_symbol #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol #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 #ifndef coff_bfd_reloc_name_lookup #define coff_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup #endif #ifndef coff_bfd_get_relocated_section_contents #define coff_bfd_get_relocated_section_contents \ bfd_generic_get_relocated_section_contents #endif #ifndef coff_bfd_relax_section #define coff_bfd_relax_section bfd_generic_relax_section #endif #ifndef coff_bfd_gc_sections #define coff_bfd_gc_sections bfd_generic_gc_sections #endif #ifndef coff_bfd_merge_sections #define coff_bfd_merge_sections bfd_generic_merge_sections #endif #ifndef coff_bfd_is_group_section #define coff_bfd_is_group_section bfd_generic_is_group_section #endif #ifndef coff_bfd_discard_group #define coff_bfd_discard_group bfd_generic_discard_group #endif #ifndef coff_section_already_linked #define coff_section_already_linked \ _bfd_generic_section_already_linked #endif #define CREATE_BIG_COFF_TARGET_VEC(VAR, NAME, EXTRA_O_FLAGS, EXTRA_S_FLAGS, UNDER, ALTERNATIVE, SWAP_TABLE) \ const bfd_target VAR = \ { \ NAME , \ bfd_target_coff_flavour, \ BFD_ENDIAN_BIG, /* Data byte order is big. */ \ BFD_ENDIAN_BIG, /* Header byte order is big. */ \ /* object flags */ \ (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | \ HAS_SYMS | HAS_LOCALS | WP_TEXT | EXTRA_O_FLAGS), \ /* section flags */ \ (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | EXTRA_S_FLAGS),\ UNDER, /* Leading symbol underscore. */ \ '/', /* AR_pad_char. */ \ 15, /* AR_max_namelen. */ \ \ /* Data conversion functions. */ \ bfd_getb64, bfd_getb_signed_64, bfd_putb64, \ bfd_getb32, bfd_getb_signed_32, bfd_putb32, \ bfd_getb16, bfd_getb_signed_16, bfd_putb16, \ \ /* Header conversion functions. */ \ bfd_getb64, bfd_getb_signed_64, bfd_putb64, \ bfd_getb32, bfd_getb_signed_32, bfd_putb32, \ bfd_getb16, bfd_getb_signed_16, bfd_putb16, \ \ /* bfd_check_format. */ \ { _bfd_dummy_target, coff_object_p, bfd_generic_archive_p, \ _bfd_dummy_target }, \ /* bfd_set_format. */ \ { bfd_false, coff_mkobject, _bfd_generic_mkarchive, bfd_false }, \ /* bfd_write_contents. */ \ { bfd_false, coff_write_object_contents, _bfd_write_archive_contents, \ bfd_false }, \ \ BFD_JUMP_TABLE_GENERIC (coff), \ BFD_JUMP_TABLE_COPY (coff), \ BFD_JUMP_TABLE_CORE (_bfd_nocore), \ BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), \ BFD_JUMP_TABLE_SYMBOLS (coff), \ BFD_JUMP_TABLE_RELOCS (coff), \ BFD_JUMP_TABLE_WRITE (coff), \ BFD_JUMP_TABLE_LINK (coff), \ BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), \ \ ALTERNATIVE, \ \ SWAP_TABLE \ }; #define CREATE_BIGHDR_COFF_TARGET_VEC(VAR, NAME, EXTRA_O_FLAGS, EXTRA_S_FLAGS, UNDER, ALTERNATIVE, SWAP_TABLE) \ const bfd_target VAR = \ { \ NAME , \ bfd_target_coff_flavour, \ BFD_ENDIAN_LITTLE, /* Data byte order is little. */ \ BFD_ENDIAN_BIG, /* Header byte order is big. */ \ /* object flags */ \ (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | \ HAS_SYMS | HAS_LOCALS | WP_TEXT | EXTRA_O_FLAGS), \ /* section flags */ \ (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | EXTRA_S_FLAGS),\ UNDER, /* Leading symbol underscore. */ \ '/', /* AR_pad_char. */ \ 15, /* AR_max_namelen. */ \ \ /* Data conversion functions. */ \ bfd_getb64, bfd_getb_signed_64, bfd_putb64, \ bfd_getb32, bfd_getb_signed_32, bfd_putb32, \ bfd_getb16, bfd_getb_signed_16, bfd_putb16, \ \ /* Header conversion functions. */ \ bfd_getb64, bfd_getb_signed_64, bfd_putb64, \ bfd_getb32, bfd_getb_signed_32, bfd_putb32, \ bfd_getb16, bfd_getb_signed_16, bfd_putb16, \ \ /* bfd_check_format. */ \ { _bfd_dummy_target, coff_object_p, bfd_generic_archive_p, \ _bfd_dummy_target }, \ /* bfd_set_format. */ \ { bfd_false, coff_mkobject, _bfd_generic_mkarchive, bfd_false }, \ /* bfd_write_contents. */ \ { bfd_false, coff_write_object_contents, _bfd_write_archive_contents, \ bfd_false }, \ \ BFD_JUMP_TABLE_GENERIC (coff), \ BFD_JUMP_TABLE_COPY (coff), \ BFD_JUMP_TABLE_CORE (_bfd_nocore), \ BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), \ BFD_JUMP_TABLE_SYMBOLS (coff), \ BFD_JUMP_TABLE_RELOCS (coff), \ BFD_JUMP_TABLE_WRITE (coff), \ BFD_JUMP_TABLE_LINK (coff), \ BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), \ \ ALTERNATIVE, \ \ SWAP_TABLE \ }; #define CREATE_LITTLE_COFF_TARGET_VEC(VAR, NAME, EXTRA_O_FLAGS, EXTRA_S_FLAGS, UNDER, ALTERNATIVE, SWAP_TABLE) \ const bfd_target VAR = \ { \ NAME , \ bfd_target_coff_flavour, \ BFD_ENDIAN_LITTLE, /* Data byte order is little. */ \ BFD_ENDIAN_LITTLE, /* Header byte order is little. */ \ /* object flags */ \ (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | \ HAS_SYMS | HAS_LOCALS | WP_TEXT | EXTRA_O_FLAGS), \ /* section flags */ \ (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | EXTRA_S_FLAGS),\ UNDER, /* Leading symbol underscore. */ \ '/', /* AR_pad_char. */ \ 15, /* AR_max_namelen. */ \ \ /* Data conversion functions. */ \ bfd_getl64, bfd_getl_signed_64, bfd_putl64, \ bfd_getl32, bfd_getl_signed_32, bfd_putl32, \ bfd_getl16, bfd_getl_signed_16, bfd_putl16, \ /* Header conversion functions. */ \ bfd_getl64, bfd_getl_signed_64, bfd_putl64, \ bfd_getl32, bfd_getl_signed_32, bfd_putl32, \ bfd_getl16, bfd_getl_signed_16, bfd_putl16, \ /* bfd_check_format. */ \ { _bfd_dummy_target, coff_object_p, bfd_generic_archive_p, \ _bfd_dummy_target }, \ /* bfd_set_format. */ \ { bfd_false, coff_mkobject, _bfd_generic_mkarchive, bfd_false }, \ /* bfd_write_contents. */ \ { bfd_false, coff_write_object_contents, _bfd_write_archive_contents, \ bfd_false }, \ \ BFD_JUMP_TABLE_GENERIC (coff), \ BFD_JUMP_TABLE_COPY (coff), \ BFD_JUMP_TABLE_CORE (_bfd_nocore), \ BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), \ BFD_JUMP_TABLE_SYMBOLS (coff), \ BFD_JUMP_TABLE_RELOCS (coff), \ BFD_JUMP_TABLE_WRITE (coff), \ BFD_JUMP_TABLE_LINK (coff), \ BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), \ \ ALTERNATIVE, \ \ SWAP_TABLE \ };