diff options
Diffstat (limited to 'gnu/usr.bin/ld/ld.h')
| -rw-r--r-- | gnu/usr.bin/ld/ld.h | 637 |
1 files changed, 199 insertions, 438 deletions
diff --git a/gnu/usr.bin/ld/ld.h b/gnu/usr.bin/ld/ld.h index 1cee37a..a43eac8 100644 --- a/gnu/usr.bin/ld/ld.h +++ b/gnu/usr.bin/ld/ld.h @@ -1,4 +1,6 @@ -/* $Id: ld.h,v 1.8 1993/12/11 11:58:26 jkh Exp $ */ +/* + * $Id: ld.h,v 1.8 1994/01/28 20:56:24 pk Exp $ + */ /*- * This code is derived from software copyrighted by the Free Software * Foundation. @@ -29,6 +31,10 @@ #define alloca __builtin_alloca #endif +#ifdef __FreeBSD__ +#define FreeBSD +#endif + #include "md.h" #include "link.h" @@ -41,23 +47,21 @@ /* Align to machine dependent boundary */ #define MALIGN(x) PALIGN(x,MAX_ALIGNMENT) -/* Size of a page; obtained from the operating system. */ - -int page_size; - /* Name this program was invoked by. */ +char *progname; -char *progname; - /* System dependencies */ /* Define this to specify the default executable format. */ #ifndef DEFAULT_MAGIC +#ifdef FreeBSD #define DEFAULT_MAGIC QMAGIC +extern int netzmagic; +#else +#define DEFAULT_MAGIC ZMAGIC +#endif #endif - -extern netzmagic; /* @@ -181,7 +185,7 @@ extern netzmagic; #ifndef DATA_START #define DATA_START(x) N_DATADDR(x) #endif - + /* If a this type of symbol is encountered, its name is a warning message to print each time the symbol referenced by the next symbol table entry is referenced. @@ -330,6 +334,22 @@ extern netzmagic; #endif /* not __GNU_STAB__ */ + +typedef struct localsymbol { + struct nzlist nzlist; /* n[z]list from file */ + struct glosym *symbol; /* Corresponding global symbol, + if any */ + struct localsymbol *next; /* List of definitions */ + struct file_entry *entry; /* Backpointer to file */ + long gotslot_offset; /* Position in GOT, if any */ + int symbolnum; /* Position in output nlist */ + int flags; +#define LS_L_SYMBOL 1 /* Local symbol starts with an `L' */ +#define LS_WRITE 2 /* Symbol goes in output symtable */ +#define LS_RENAME 4 /* xlat name to `<file>.<name>' */ +#define LS_GOTSLOTCLAIMED 8 /* This symbol has a GOT entry */ +} localsymbol_t; + /* Symbol table */ /* @@ -340,225 +360,102 @@ extern netzmagic; */ typedef struct glosym { - /* Pointer to next symbol in this symbol's hash bucket. */ - struct glosym *link; - /* Name of this symbol. */ - char *name; - /* Value of this symbol as a global symbol. */ - long value; - /* - * Chain of external 'nlist's in files for this symbol, both defs and - * refs. - */ - struct localsymbol *refs; - /* - * Any warning message that might be associated with this symbol from - * an N_WARNING symbol encountered. - */ - char *warning; - /* - * Nonzero means definitions of this symbol as common have been seen, - * and the value here is the largest size specified by any of them. - */ - int max_common_size; - /* - * For relocatable_output, records the index of this global sym in - * the symbol table to be written, with the first global sym given - * index 0. - */ - int symbolnum; - /* - * For dynamically linked output, records the index in the RRS - * symbol table. - */ - int rrs_symbolnum; - /* - * Nonzero means a definition of this global symbol is known to - * exist. Library members should not be loaded on its account. - */ - char defined; - /* - * Nonzero means a reference to this global symbol has been seen in a - * file that is surely being loaded. A value higher than 1 is the - * n_type code for the symbol's definition. - */ - char referenced; - /* - * A count of the number of undefined references printed for a - * specific symbol. If a symbol is unresolved at the end of - * digest_symbols (and the loading run is supposed to produce - * relocatable output) do_file_warnings keeps track of how many - * unresolved reference error messages have been printed for each - * symbol here. When the number hits MAX_UREFS_PRINTED, messages - * stop. - */ - unsigned char undef_refs; - /* - * 1 means that this symbol has multiple definitions. 2 means that - * it has multiple definitions, and some of them are set elements, - * one of which has been printed out already. - */ - unsigned char multiply_defined; - /* Nonzero means print a message at all refs or defs of this symbol */ - char trace; - - /* - * For symbols of type N_INDR, this points at the real symbol. - */ - struct glosym *alias; - - /* - * Count number of elements in set vector if symbol is of type N_SETV - */ - int setv_count; - - /* Dynamic lib support */ - - /* - * Nonzero means a definition of this global symbol has been found - * in a shared object. These symbols do not go into the symbol - * section of the resulting a.out file. They *do* go into the - * dynamic link information segment. - */ - char so_defined; - - /* Size of symbol as determined by N_SIZE symbols in object files */ - int size; - - /* Auxialiary info to put in the `nz_other' field of the - * RRS symbol table. Used by the run-time linker to resolve - * references to function addresses from within shared objects. - */ - int aux; -#define RRS_FUNC 2 - - /* - * Chain of external 'nlist's in shared objects for this symbol, both - * defs and refs. - */ - struct localsymbol *sorefs; + struct glosym *link; /* Next symbol hash bucket. */ + char *name; /* Name of this symbol. */ + long value; /* Value of this symbol */ + localsymbol_t *refs; /* Chain of local symbols from object + files pertaining to this global + symbol */ + localsymbol_t *sorefs;/* Same for local symbols from shared + object files. */ + + char *warning; /* message, from N_WARNING nlists */ + int common_size; /* Common size */ + int symbolnum; /* Symbol index in output symbol table */ + int rrs_symbolnum; /* Symbol index in RRS symbol table */ + + struct nlist *def_nlist; /* The local symbol that gave this + global symbol its definition */ + + char defined; /* Definition of this symbol */ + char so_defined; /* Definition of this symbol in a shared + object. These go into the RRS symbol table */ + u_char undef_refs; /* Count of number of "undefined" + messages printed for this symbol */ + u_char mult_defs; /* Same for "multiply defined" symbols */ + struct glosym *alias; /* For symbols of type N_INDR, this + points at the real symbol. */ + int setv_count; /* Number of elements in N_SETV symbols */ + int size; /* Size of this symbol (either from N_SIZE + symbols or a from shared object's RRS */ + int aux; /* Auxiliary type information conveyed in + the `n_other' field of nlists */ /* The offset into one of the RRS tables, -1 if not used */ - long jmpslot_offset; - char jmpslot_claimed; + long jmpslot_offset; + long gotslot_offset; - long gotslot_offset; - char gotslot_claimed; + long flags; - char cpyreloc_reserved; - char cpyreloc_claimed; +#define GS_DEFINED 1 /* Symbol has definition (notyetused)*/ +#define GS_REFERENCED 2 /* Symbol is referred to by something + interesting */ +#define GS_TRACE 4 /* Symbol will be traced */ +#define GS_JMPSLOTCLAIMED 8 /* */ +#define GS_GOTSLOTCLAIMED 0x10 /* Some state bits concerning */ +#define GS_CPYRELOCRESERVED 0x20 /* entries in GOT and PLT tables */ +#define GS_CPYRELOCCLAIMED 0x40 /* */ - /* The local symbol that gave this global symbol its definition */ - struct nlist *def_nlist; } symbol; /* Number of buckets in symbol hash table */ -#define TABSIZE 1009 +#define SYMTABSIZE 1009 -/* The symbol hash table: a vector of TABSIZE pointers to struct glosym. */ -symbol *symtab[TABSIZE]; +/* The symbol hash table: a vector of SYMTABSIZE pointers to struct glosym. */ +extern symbol *symtab[]; #define FOR_EACH_SYMBOL(i,sp) { \ int i; \ - for (i = 0; i < TABSIZE; i++) { \ + for (i = 0; i < SYMTABSIZE; i++) { \ register symbol *sp; \ for (sp = symtab[i]; sp; sp = sp->link) #define END_EACH_SYMBOL }} -/* Number of symbols in symbol hash table. */ -int num_hash_tab_syms; - -/* Count number of nlist entries for global symbols */ -int global_sym_count; - -/* Count number of N_SIZE nlist entries for output (relocatable_output only) */ -int size_sym_count; - -/* Count the number of nlist entries that are for local symbols. - This count and the three following counts - are incremented as as symbols are entered in the symbol table. */ -int local_sym_count; - -/* Count number of nlist entries that are for local symbols - whose names don't start with L. */ -int non_L_local_sym_count; - -/* Count the number of nlist entries for debugger info. */ -int debugger_sym_count; - -/* Count the number of global symbols referenced and not defined. */ -int undefined_global_sym_count; - -/* Count the number of symbols referenced from shared objects and not defined */ -int undefined_shobj_sym_count; - -/* Count the number of global symbols multiply defined. */ -int multiple_def_count; - -/* Count the number of defined global symbols. - Each symbol is counted only once - regardless of how many different nlist entries refer to it, - since the output file will need only one nlist entry for it. - This count is computed by `digest_symbols'; - it is undefined while symbols are being loaded. */ -int defined_global_sym_count; - -/* Count the number of symbols defined through common declarations. - This count is kept in symdef_library, linear_library, and - enter_global_ref. It is incremented when the defined flag is set - in a symbol because of a common definition, and decremented when - the symbol is defined "for real" (ie. by something besides a common - definition). */ -int common_defined_global_count; - -/* Count the number of linker defined symbols. - XXX - Currently, only __DYNAMIC and _G_O_T_ go here if required, - perhaps _etext, _edata and _end should go here too */ -int special_sym_count; - -/* Count number of aliased symbols */ -int global_alias_count; - -/* Count number of set element type symbols and the number of separate - vectors which these symbols will fit into */ -int set_symbol_count; -int set_vector_count; - -/* Define a linked list of strings which define symbols which should - be treated as set elements even though they aren't. Any symbol - with a prefix matching one of these should be treated as a set - element. - - This is to make up for deficiencies in many assemblers which aren't - willing to pass any stabs through to the loader which they don't - understand. */ -struct string_list_element { - char *str; - struct string_list_element *next; -}; +/* # of global symbols referenced and not defined. */ +extern int undefined_global_sym_count; -struct string_list_element *set_element_prefixes; +/* # of undefined symbols referenced by shared objects */ +extern int undefined_shobj_sym_count; -/* Count the number of warning symbols encountered. */ -int warning_count; +/* # of multiply defined symbols. */ +extern int multiple_def_count; -/* 1 => write load map. */ -int write_map; +/* # of common symbols. */ +extern int common_defined_global_count; -/* 1 => write relocation into output file so can re-input it later. */ -int relocatable_output; +/* # of warning symbols encountered. */ +extern int warning_count; -/* Nonzero means ptr to symbol entry for symbol to use as start addr. - -e sets this. */ -symbol *entry_symbol; +/* + * Define a linked list of strings which define symbols which should be + * treated as set elements even though they aren't. Any symbol with a prefix + * matching one of these should be treated as a set element. + * + * This is to make up for deficiencies in many assemblers which aren't willing + * to pass any stabs through to the loader which they don't understand. + */ +struct string_list_element { + char *str; + struct string_list_element *next; +}; -symbol *edata_symbol; /* the symbol _edata */ -symbol *etext_symbol; /* the symbol _etext */ -symbol *end_symbol; /* the symbol _end */ -symbol *got_symbol; /* the symbol __GLOBAL_OFFSET_TABLE_ */ -symbol *dynamic_symbol; /* the symbol __DYNAMIC */ +extern symbol *entry_symbol; /* the entry symbol, if any */ +extern symbol *edata_symbol; /* the symbol _edata */ +extern symbol *etext_symbol; /* the symbol _etext */ +extern symbol *end_symbol; /* the symbol _end */ +extern symbol *got_symbol; /* the symbol __GLOBAL_OFFSET_TABLE_ */ +extern symbol *dynamic_symbol; /* the symbol __DYNAMIC */ - /* * Each input file, and each library member ("subfile") being loaded, has a * `file_entry' structure for it. @@ -573,160 +470,82 @@ symbol *dynamic_symbol; /* the symbol __DYNAMIC */ */ struct file_entry { - /* Name of this file. */ - char *filename; - + char *filename; /* Name of this file. */ /* * Name to use for the symbol giving address of text start Usually * the same as filename, but for a file spec'd with -l this is the -l * switch itself rather than the filename. */ - char *local_sym_name; - - /* Describe the layout of the contents of the file */ - - /* The file's a.out header. */ - struct exec header; -#if 0 - /* Offset in file of GDB symbol segment, or 0 if there is none. */ - int symseg_offset; -#endif - - /* Describe data from the file loaded into core */ - + char *local_sym_name; + struct exec header; /* The file's a.out header. */ + localsymbol_t *symbols; /* Symbol table of the file. */ + int nsymbols; /* Number of symbols in above array. */ + int string_size; /* Size in bytes of string table. */ + char *strings; /* Pointer to the string table when + in core, NULL otherwise */ + int strings_offset; /* Offset of string table, + (normally N_STROFF() + 4) */ /* - * Symbol table of the file. - * We need access to the global symbol early, ie. before - * symbols are asssigned there final values. gotslot_offset is - * here because GOT entries may be generated for local symbols. + * Next two used only if `relocatable_output' or if needed for + * output of undefined reference line numbers. */ - struct localsymbol { - struct nzlist nzlist; - struct glosym *symbol; - struct localsymbol *next; - long gotslot_offset; - char gotslot_claimed; - char write; - char is_L_symbol; - char rename; - int symbolnum; - } *symbols; - - /* Number of symbols in above array. */ - int nsymbols; - - /* Size in bytes of string table. */ - int string_size; + struct relocation_info *textrel; /* Text relocations */ + int ntextrel; /* # of text relocations */ + struct relocation_info *datarel; /* Data relocations */ + int ndatarel; /* # of data relocations */ /* - * Pointer to the string table. The string table is not kept in core - * all the time, but when it is in core, its address is here. + * Relation of this file's segments to the output file. */ - char *strings; - - /* Offset of string table (normally N_STROFF() + 4) */ - int strings_offset; - - /* Next two used only if `relocatable_output' or if needed for */ - /* output of undefined reference line numbers. */ - - /* Text reloc info saved by `write_text' for `coptxtrel'. */ - struct relocation_info *textrel; - int ntextrel; - - /* Data reloc info saved by `write_data' for `copdatrel'. */ - struct relocation_info *datarel; - int ndatarel; - - /* Relation of this file's segments to the output file */ - - /* Start of this file's text seg in the output file core image. */ - int text_start_address; - - /* Start of this file's data seg in the output file core image. */ - int data_start_address; - - /* Start of this file's bss seg in the output file core image. */ - int bss_start_address; -#if 0 - /* - * Offset in bytes in the output file symbol table of the first local - * symbol for this file. Set by `write_file_symbols'. - */ - int local_syms_offset; -#endif - - /* For library members only */ - - /* For a library, points to chain of entries for the library members. */ - struct file_entry *subfiles; - - /* - * For a library member, offset of the member within the archive. - * Zero for files that are not library members. - */ - int starting_offset; - - /* Size of contents of this file, if library member. */ - int total_size; - - /* For library member, points to the library's own entry. */ - struct file_entry *superfile; - - /* For library member, points to next entry for next member. */ - struct file_entry *chain; - + int text_start_address; /* Start of this file's text segment + in the output file core image. */ + int data_start_address; /* Start of this file's data segment + in the output file core image. */ + int bss_start_address; /* Start of this file's bss segment + in the output file core image. */ + struct file_entry *subfiles; /* For a library, points to chain of + entries for the library members. */ + struct file_entry *superfile; /* For library member, points to the + library's own entry. */ + struct file_entry *chain; /* For library member, points to next + entry for next member. */ + int starting_offset; /* For a library member, offset of the + member within the archive. Zero for + files that are not library members.*/ + int total_size; /* Size of contents of this file, + if library member. */ #ifdef SUN_COMPAT - /* For shared libraries which have a .sa companion */ - struct file_entry *silly_archive; + struct file_entry *silly_archive;/* For shared libraries which have + a .sa companion */ #endif - - /* 1 if file is a library. */ - char library_flag; - - /* 1 if file's header has been read into this structure. */ - char header_read_flag; - - /* 1 means search a set of directories for this file. */ - char search_dirs_flag; - - /* - * 1 means this is base file of incremental load. Do not load this - * file's text or data. Also default text_start to after this file's - * bss. - */ - char just_syms_flag; - - /* 1 means search for dynamic libraries (dependent on -B switch) */ - char search_dynamic_flag; - - /* version numbers of selected shared library */ - int lib_major, lib_minor; - - /* This entry is a shared object */ - char is_dynamic; - - /* 1 if this entry is not a major player anymore */ - char scrapped; + int lib_major, lib_minor; /* Version numbers of a shared object */ + + int flags; +#define E_IS_LIBRARY 1 /* File is a an archive */ +#define E_HEADER_VALID 2 /* File's header has been read */ +#define E_SEARCH_DIRS 4 /* Search directories for file */ +#define E_SEARCH_DYNAMIC 8 /* Search for shared libs allowed */ +#define E_JUST_SYMS 0x10 /* File is used for incremental load */ +#define E_DYNAMIC 0x20 /* File is a shared object */ +#define E_SCRAPPED 0x40 /* Ignore this file */ +#define E_SYMBOLS_USED 0x80 /* Symbols from this entry were used */ }; -typedef struct localsymbol localsymbol_t; +/* + * Section start addresses. + */ +extern int text_size; /* total size of text. */ +extern int text_start; /* start of text */ +extern int text_pad; /* clear space between text and data */ +extern int data_size; /* total size of data. */ +extern int data_start; /* start of data */ +extern int data_pad; /* part of bss segment within data */ -/* Vector of entries for input files specified by arguments. - These are all the input files except for members of specified libraries. */ -struct file_entry *file_table; +extern int bss_size; /* total size of bss. */ +extern int bss_start; /* start of bss */ -/* Length of that vector. */ -int number_of_files; - -/* Current link mode */ -#define DYNAMIC 1 /* Consider shared libraries */ -#define SYMBOLIC 2 /* Force symbolic resolution */ -#define FORCEARCHIVE 4 /* Force inclusion of all members - of archives */ -#define SHAREABLE 8 /* Build a shared object */ -#define SILLYARCHIVE 16 /* Process .sa companions, if any */ -int link_mode; +extern int text_reloc_size; /* total size of text relocation. */ +extern int data_reloc_size; /* total size of data relocation. */ /* * Runtime Relocation Section (RRS). @@ -735,115 +554,57 @@ int link_mode; * static linking), or can just exist of GOT and PLT entries (in case of * statically linked PIC code). */ - -int rrs_section_type; +extern int rrs_section_type; /* What's in the RRS section */ #define RRS_NONE 0 #define RRS_PARTIAL 1 #define RRS_FULL 2 - -int rrs_text_size; -int rrs_data_size; -int rrs_text_start; -int rrs_data_start; +extern int rrs_text_size; /* Size of RRS text additions */ +extern int rrs_text_start; /* Location of above */ +extern int rrs_data_size; /* Size of RRS data additions */ +extern int rrs_data_start; /* Location of above */ /* Version number to put in __DYNAMIC (set by -V) */ -int soversion; - -/* When loading the text and data, we can avoid doing a close - and another open between members of the same library. - - These two variables remember the file that is currently open. - Both are zero if no file is open. - - See `each_file' and `file_close'. */ - -struct file_entry *input_file; -int input_desc; - -/* The name of the file to write; "a.out" by default. */ - -char *output_filename; - -/* Descriptor for writing that file with `mywrite'. */ - -int outdesc; - -/* Header for that file (filled in by `write_header'). */ - -struct exec outheader; - -/* The following are computed by `digest_symbols'. */ - -int text_size; /* total size of text of all input files. */ -int data_size; /* total size of data of all input files. */ -int bss_size; /* total size of bss of all input files. */ -int text_reloc_size; /* total size of text relocation of all input files. */ -int data_reloc_size; /* total size of data relocation of all input files. */ - -/* Relocation offsets set by perform_relocation(). Defined globaly here - because some of the RRS routines need access to them */ -int text_relocation; -int data_relocation; -int bss_relocation; -int pc_relocation; - -/* Specifications of start and length of the area reserved at the end - of the data segment for the set vectors. Computed in 'digest_symbols' */ -int set_sect_start; -int set_sect_size; - -/* Amount of cleared space to leave between the text and data segments. */ -int text_pad; - -/* Amount of bss segment to include as part of the data segment. */ -int data_pad; +extern int soversion; +#ifndef DEFAULT_SOVERSION +#define DEFAULT_SOVERSION LD_VERSION_BSD +#endif +extern int pc_relocation; /* Current PC reloc value */ -/* Record most of the command options. */ +extern int number_of_shobjs; /* # of shared objects linked in */ -/* Address we assume the text section will be loaded at. - We relocate symbols and text and data for this, but we do not - write any padding in the output file for it. */ -int text_start; +/* Current link mode */ +extern int link_mode; +#define DYNAMIC 1 /* Consider shared libraries */ +#define SYMBOLIC 2 /* Force symbolic resolution */ +#define FORCEARCHIVE 4 /* Force inclusion of all members + of archives */ +#define SHAREABLE 8 /* Build a shared object */ +#define SILLYARCHIVE 16 /* Process .sa companions, if any */ -/* Offset of default entry-pc within the text section. */ -int entry_offset; +extern int outdesc; /* Output file descriptor. */ +extern struct exec outheader; /* Output file header. */ +extern int magic; /* Output file magic. */ +extern int oldmagic; +extern int relocatable_output; -/* Address we decide the data section will be loaded at. */ -int data_start; -int bss_start; +/* Size of a page. */ +extern int page_size; -/* Keep a list of any symbols referenced from the command line (so - that error messages for these guys can be generated). This list is - zero terminated. */ -struct glosym **cmdline_references; -int cl_refs_allocated; +extern char **search_dirs; /* Directories to search for libraries. */ +extern int n_search_dirs; /* Length of above. */ -/* - * Actual vector of directories to search; this contains those specified with - * -L plus the standard ones. - */ -char **search_dirs; +extern int write_map; /* write a load map (`-M') */ -/* Length of the vector `search_dirs'. */ -int n_search_dirs; +extern void (*fatal_cleanup_hook)__P((void)); -void load_symbols __P((void)); void read_header __P((int, struct file_entry *)); void read_entry_symbols __P((int, struct file_entry *)); void read_entry_strings __P((int, struct file_entry *)); void read_entry_relocation __P((int, struct file_entry *)); void enter_file_symbols __P((struct file_entry *)); void read_file_symbols __P((struct file_entry *)); - -void write_output __P((void)); -void write_header __P((void)); -void write_text __P((void)); -void write_data __P((void)); -void write_rel __P((void)); -void write_syms __P((void)); -void write_symsegs __P((void)); -void mywrite (); +void mywrite __P((void *, int, int, int)); /* In warnings.c: */ void perror_name __P((char *)); @@ -917,10 +678,10 @@ void swap_longs __P((long *, int)); void swap_symbols __P((struct nlist *, int)); void swap_zsymbols __P((struct nzlist *, int)); void swap_ranlib_hdr __P((struct ranlib *, int)); -void swap_link_dynamic __P((struct link_dynamic *)); -void swap_link_dynamic_2 __P((struct link_dynamic_2 *)); -void swap_ld_debug __P((struct ld_debug *)); -void swapin_link_object __P((struct link_object *, int)); -void swapout_link_object __P((struct link_object *, int)); +void swap__dynamic __P((struct link_dynamic *)); +void swap_section_dispatch_table __P((struct section_dispatch_table *)); +void swap_so_debug __P((struct so_debug *)); +void swapin_sod __P((struct sod *, int)); +void swapout_sod __P((struct sod *, int)); void swapout_fshash __P((struct fshash *, int)); #endif |
