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- /* @(#)link.h 1.6 88/08/19 SMI */
-
- /*
- * Copyright (c) 1987 by Sun Microsystems, Inc.
- */
-
- /*
- * Link editor public definitions.
- */
-
- #ifndef _link_h
- #define _link_h
-
- /*
- * Structure describing logical name and requirements on an object
- * which is to be loaded dynamically.
- */
- struct old_link_object {
- char *lo_name; /* name of object */
- int lo_library : 1, /* searched for by library rules */
- lo_unused : 31;
- short lo_major; /* major version number */
- short lo_minor; /* minor version number */
- };
-
- struct link_object {
- long lo_name; /* name (often relative) */
- int lo_library : 1, /* searched for by library rules */
- lo_unused : 31;
- short lo_major; /* major version number */
- short lo_minor; /* minor version number */
- long lo_next; /* next one (often relative) */
- };
-
- /*
- * Structure describing name and placement of dynamically loaded
- * objects in a process' address space.
- */
- struct link_map {
- caddr_t lm_addr; /* address at which object mapped */
- char *lm_name; /* full name of loaded object */
- struct link_map *lm_next; /* next object in map */
- struct link_object *lm_lop; /* link object that got us here */
- caddr_t lm_lob; /* base address for said link object */
- int lm_rwt : 1; /* text is read/write */
- struct link_dynamic *lm_ld; /* dynamic structure */
- caddr_t lm_lpd; /* loader private data */
- };
-
- /*
- * Version 1 of dynamic linking information. With the exception of
- * ld_loaded (determined at execution time) and ld_stab_hash (a special
- * case of relocation handled at execution time), the values in this
- * structure reflect offsets from the containing link_dynamic structure.
- */
- struct link_dynamic_1 {
- struct link_map *ld_loaded; /* list of loaded objects */
- long ld_need; /* list of needed objects */
- long ld_rules; /* search rules for library objects */
- long ld_got; /* global offset table */
- long ld_plt; /* procedure linkage table */
- long ld_rel; /* relocation table */
- long ld_hash; /* symbol hash table */
- long ld_stab; /* symbol table itself */
- long (*ld_stab_hash)(); /* "pointer" to symbol hash function */
- long ld_buckets; /* number of hash buckets */
- long ld_symbols; /* symbol strings */
- long ld_symb_size; /* size of symbol strings */
- long ld_text; /* size of text area */
- };
-
- struct link_dynamic_2 {
- struct link_map *ld_loaded; /* list of loaded objects */
- long ld_need; /* list of needed objects */
- long ld_rules; /* search rules for library objects */
- long ld_got; /* global offset table */
- long ld_plt; /* procedure linkage table */
- long ld_rel; /* relocation table */
- long ld_hash; /* symbol hash table */
- long ld_stab; /* symbol table itself */
- long (*ld_stab_hash)(); /* "pointer" to symbol hash function */
- long ld_buckets; /* number of hash buckets */
- long ld_symbols; /* symbol strings */
- long ld_symb_size; /* size of symbol strings */
- long ld_text; /* size of text area */
- long ld_plt_sz; /* size of procedure linkage table */
- };
-
- /*
- * Structure pointing to run time allocated common symbols and
- * its string.
- */
- struct rtc_symb {
- struct nlist *rtc_sp; /* symbol for common */
- struct rtc_symb *rtc_next; /* next common */
- };
-
- /*
- * Debugger interface structure.
- */
- struct ld_debug {
- int ldd_version; /* version # of interface */
- int ldd_in_debugger; /* a debugger is running us */
- int ldd_sym_loaded; /* we loaded some symbols */
- char *ldd_bp_addr; /* place for ld-generated bpt */
- int ldd_bp_inst; /* instruction which was there */
- struct rtc_symb *ldd_cp; /* commons we built */
- };
-
- /*
- * Structure associated with each object which may be or which requires
- * execution-time link editing. Used by the run-time linkage editor to
- * identify needed objects and symbol definitions and references.
- */
- struct old_link_dynamic {
- int ld_version; /* version # of this structure */
- union {
- struct link_dynamic_1 ld_1;
- } ld_un;
-
- int in_debugging;
- int sym_loaded;
- char *bp_addr;
- int bp_inst;
- struct rtc_symb *cp; /* pointer to an array of runtime */
- /* allocated common symbols. */
- };
-
- struct link_dynamic {
- int ld_version; /* version # of this structure */
- struct ld_debug *ldd;
- union {
- struct link_dynamic_1 *ld_1;
- struct link_dynamic_2 *ld_2;
- } ld_un;
- };
-
- #define v2 ld_un.ld_2
- #define v1 ld_un.ld_1
-
- /*
- * get size of relocations
- */
- #define GETGOTSZ(x) (x->ld_version < 2 ? ((struct old_link_dynamic *) x)->v1.ld_plt - ((struct old_link_dynamic *) x)->v1.ld_got : (x)->v2->ld_plt - (x)->v2->ld_got)
-
- #define GETPLTSZ(x) (x->ld_version < 2 ? ((struct old_link_dynamic *) x)->v1.ld_rel - ((struct old_link_dynamic *) x)->v1.ld_plt : (x)->v2->ld_rel - (x)->v2->ld_plt)
-
- #define GETRELSZ(x) (x->ld_version < 2 ? ((struct old_link_dynamic *) x)->v1.ld_hash - ((struct old_link_dynamic *) x)->v1.ld_rel : (x)->v2->ld_hash - (x)->v2->ld_rel)
-
- #define GETHASHSZ(x) (x->ld_version < 2 ? ((struct old_link_dynamic *) x)->v1.ld_stab - ((struct old_link_dynamic *) x)->v1.ld_hash : (x)->v2->ld_stab - (x)->v2->ld_hash)
-
- #define GETSTABSZ(x) (x->ld_version < 2 ? ((struct old_link_dynamic *) x)->v1.ld_symbols - ((struct old_link_dynamic *) x)->v1.ld_stab : (x)->v2->ld_symbols - (x)->v2->ld_stab)
-
- #undef v2
- #undef v1
-
- #endif /*!_link_h*/
-