home *** CD-ROM | disk | FTP | other *** search
- /*
- * Copyright (c) 1993 Paul Kranenburg
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by Paul Kranenburg.
- * 4. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * $Id: dynamic.h,v 1.4 1997/05/13 10:23:46 dfr Exp $
- */
-
- #ifndef __DYNAMIC_H__
- #define __DYNAMIC_H__
-
- #define SUN_COMPAT
-
- #include "md.h"
- #include "link.h"
-
- #ifndef RELOC_JMPTAB_P
-
- #define RELOC_JMPTAB_P(r) ((r)->r_jmptable)
- #define RELOC_BASEREL_P(r) ((r)->r_baserel)
- #define RELOC_RELATIVE_P(r) ((r)->r_relative)
- #define RELOC_COPY_P(r) ((r)->r_copy)
- #define RELOC_LAZY_P(r) ((r)->r_jmptable)
-
- #define CHECK_GOT_RELOC(r) ((r)->r_pcrel)
- #define RELOC_PIC_TYPE(r) ((r)->r_baserel? \
- PIC_TYPE_LARGE:PIC_TYPE_NONE)
- #endif
-
- #ifndef RELOC_INIT_SEGMENT_RELOC
- #define RELOC_INIT_SEGMENT_RELOC(r)
- #endif
-
- #ifndef MAX_GOTOFF
- #define MAX_GOTOFF(x) (LONG_MAX)
- #endif
-
- #ifndef MIN_GOTOFF
- #define MIN_GOTOFF(x) (LONG_MIN)
- #endif
-
- /*
- * Internal representation of relocation types
- */
- #define RELTYPE_EXTERN 1
- #define RELTYPE_JMPSLOT 2
- #define RELTYPE_BASEREL 4
- #define RELTYPE_RELATIVE 8
- #define RELTYPE_COPY 16
-
- #define N_ISWEAK(p) (N_BIND(p) & BIND_WEAK)
-
- 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_HASGOTSLOT 8 /* This symbol has a GOT entry */
- #define LS_WARNING 16 /* Second part of a N_WARNING duo */
- } localsymbol_t;
-
- /*
- * Global symbol data is recorded in these structures, one for each global
- * symbol. They are found via hashing in 'symtab', which points to a vector
- * of buckets. Each bucket is a chain of these structures through the link
- * field.
- *
- * Rewritten version to support extra info for dynamic linking.
- */
-
- struct glosym {
- 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 */
-
- localsymbol_t *def_lsp; /* 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;
- long gotslot_offset;
-
- long flags;
-
- #define GS_DEFINED 0x1 /* Symbol has definition (notyetused)*/
- #define GS_REFERENCED 0x2 /* Symbol is referred to by something
- interesting */
- #define GS_TRACE 0x4 /* Symbol will be traced */
- #define GS_HASJMPSLOT 0x8 /* */
- #define GS_HASGOTSLOT 0x10 /* Some state bits concerning */
- #define GS_CPYRELOCRESERVED 0x20 /* entries in GOT and PLT tables */
- #define GS_CPYRELOCCLAIMED 0x40 /* */
- #define GS_WEAK 0x80 /* Symbol is weakly defined */
-
- };
- #ifndef __symbol_defined__
- #define __symbol_defined__
- typedef struct glosym symbol;
- #endif
-
- /* 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 < SYMTABSIZE; i++) { \
- register symbol *sp; \
- for (sp = symtab[i]; sp; sp = sp->link)
-
- #define END_EACH_SYMBOL }}
-
- 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.
- *
- * For files specified by command args, these are contained in the vector which
- * `file_table' points to.
- *
- * For library members, they are dynamically allocated, and chained through the
- * `chain' field. The chain is found in the `subfiles' field of the
- * `file_entry'. The `file_entry' objects for the members have `superfile'
- * fields pointing to the one for the library.
- *
- * Rewritten version to support extra info for dynamic linking.
- */
-
- struct file_entry {
- 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;
- 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) */
- /*
- * Next two used only if `relocatable_output' or if needed for
- * output of undefined reference line numbers.
- */
- struct relocation_info *textrel; /* Text relocations */
- int ntextrel; /* # of text relocations */
- struct relocation_info *datarel; /* Data relocations */
- int ndatarel; /* # of data relocations */
-
- /*
- * Relation of this file's segments to the output file.
- */
- 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
- struct file_entry *silly_archive;/* For shared libraries which have
- a .sa companion */
- #endif
- 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 */
- #define E_SECONDCLASS 0x100 /* Shared object is a subsidiary */
- };
-
- /*
- * Runtime Relocation Section (RRS).
- * This describes the data structures that go into the output text and data
- * segments to support the run-time linker. The RRS can be empty (plain old
- * static linking), or can just exist of GOT and PLT entries (in case of
- * statically linked PIC code).
- */
- extern int rrs_section_type; /* What's in the RRS section */
- #define RRS_NONE 0
- #define RRS_PARTIAL 1
- #define RRS_FULL 2
- 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 */
- extern char *rrs_search_paths; /* `-L' RT paths */
-
- /* Version number to put in __DYNAMIC (set by -V) */
- extern int soversion;
- #ifndef DEFAULT_SOVERSION
- #define DEFAULT_SOVERSION LD_VERSION_BSD
- #endif
-
- extern int pc_relocation; /* Current PC reloc value */
-
- extern int number_of_shobjs; /* # of shared objects linked in */
-
- /* 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 */
- #define FORCEDYNAMIC 32 /* Force dynamic output even if no
- shared libraries included */
- #define WARNRRSTEXT 64 /* Warn about rrs in text */
-
- extern FILE *outstream; /* Output file. */
- extern struct exec outheader; /* Output file header. */
- extern int magic; /* Output file magic. */
- extern int oldmagic;
- extern int relocatable_output;
- extern int pic_type;
- #define PIC_TYPE_NONE 0
- #define PIC_TYPE_SMALL 1
- #define PIC_TYPE_LARGE 2
-
- 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 *));
- int set_element_prefixed_p __P((char *));
- int text_offset __P((struct file_entry *));
- int file_open __P((struct file_entry *));
- void each_file __P((void (*)(), void *));
- void each_full_file __P((void (*)(), void *));
- unsigned long check_each_file __P((unsigned long (*)(), void *));
- void mywrite __P((void *, int, int, FILE *));
- void padfile __P((int, FILE *));
-
- /* In warnings.c: */
- void perror_name __P((char *));
- void perror_file __P((struct file_entry *));
- void print_symbols __P((FILE *));
- char *get_file_name __P((struct file_entry *));
- void print_file_name __P((struct file_entry *, FILE *));
- void prline_file_name __P((struct file_entry *, FILE *));
- int do_warnings __P((FILE *));
-
- /* In etc.c: */
- #include "support.h"
-
- /* In symbol.c: */
- void symtab_init __P((int));
- symbol *getsym __P((char *)), *getsym_soft __P((char *));
-
- /* In lib.c: */
- void search_library __P((int, struct file_entry *));
- void read_shared_object __P((int, struct file_entry *));
- int findlib __P((struct file_entry *));
-
- /* In shlib.c: */
- #include "shlib.h"
-
- /* In rrs.c: */
- void init_rrs __P((void));
- int rrs_add_shobj __P((struct file_entry *));
- void alloc_rrs_reloc __P((struct file_entry *, symbol *));
- void alloc_rrs_segment_reloc __P((struct file_entry *, struct relocation_info *));
- void alloc_rrs_jmpslot __P((struct file_entry *, symbol *));
- void alloc_rrs_gotslot __P((struct file_entry *, struct relocation_info *, localsymbol_t *));
- void alloc_rrs_cpy_reloc __P((struct file_entry *, symbol *));
-
- int claim_rrs_reloc __P((struct file_entry *, struct relocation_info *, symbol *, long *));
- long claim_rrs_jmpslot __P((struct file_entry *, struct relocation_info *, symbol *, long));
- long claim_rrs_gotslot __P((struct file_entry *, struct relocation_info *, struct localsymbol *, long));
- long claim_rrs_internal_gotslot __P((struct file_entry *, struct relocation_info *, struct localsymbol *, long));
- void claim_rrs_cpy_reloc __P((struct file_entry *, struct relocation_info *, symbol *));
- void claim_rrs_segment_reloc __P((struct file_entry *, struct relocation_info *));
- void consider_rrs_section_lengths __P((void));
- void relocate_rrs_addresses __P((void));
- void write_rrs __P((void));
-
- /* In <md>.c */
- void md_init_header __P((struct exec *, int, int));
- long md_get_addend __P((struct relocation_info *, unsigned char *));
- void md_relocate __P((struct relocation_info *, long, unsigned char *, int));
- void md_make_jmpslot __P((jmpslot_t *, long, long));
- void md_fix_jmpslot __P((jmpslot_t *, long, u_long));
- int md_make_reloc __P((struct relocation_info *, struct relocation_info *, int));
- void md_make_jmpreloc __P((struct relocation_info *, struct relocation_info *, int));
- void md_make_gotreloc __P((struct relocation_info *, struct relocation_info *, int));
- void md_make_copyreloc __P((struct relocation_info *, struct relocation_info *));
- void md_set_breakpoint __P((long, long *));
-
- #ifdef NEED_SWAP
- /* In xbits.c: */
- 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__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
-
- #endif /* __DYNAMIC_H__ */
-