=================================================================== RCS file: /cvsrepo/anoncvs/cvs/src/include/link.h,v retrieving revision 1.11 retrieving revision 1.12 diff -u -r1.11 -r1.12 --- src/include/link.h 2002/06/03 12:14:30 1.11 +++ src/include/link.h 2002/06/07 03:00:01 1.12 @@ -1,4 +1,4 @@ -/* $OpenBSD: link.h,v 1.11 2002/06/03 12:14:30 deraadt Exp $ */ +/* $OpenBSD: link.h,v 1.12 2002/06/07 03:00:01 art Exp $ */ /* $NetBSD: link.h,v 1.10 1996/01/09 00:00:11 pk Exp $ */ /* @@ -31,20 +31,14 @@ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -/* - * RRS section definitions. - * - * The layout of some data structures defined in this header file is - * such that we can provide compatibility with the SunOS 4.x shared - * library scheme. - */ #ifndef _LINK_H_ #define _LINK_H_ -/* XXXART - ? */ -#ifndef DT_PROCNUM -#define DT_PROCNUM 0 +#ifdef __ELF__ +#include +#else +#include #endif /* @@ -80,95 +74,8 @@ caddr_t som_spd; /* Private data */ }; -/* - * Symbol description with size. This is simply an `nlist' with - * one field (nz_size) added. - * Used to convey size information on items in the data segment - * of shared objects. An array of these live in the shared object's - * text segment and is addressed by the `sdt_nzlist' field. - */ -struct nzlist { - struct nlist nlist; - u_long nz_size; -#define nz_un nlist.n_un -#define nz_strx nlist.n_un.n_strx -#define nz_name nlist.n_un.n_name -#define nz_type nlist.n_type -#define nz_value nlist.n_value -#define nz_desc nlist.n_desc -#define nz_other nlist.n_other -}; -#define N_AUX(p) ((p)->n_other & 0xf) -#define N_BIND(p) (((unsigned int)(p)->n_other >> 4) & 0xf) -#define N_OTHER(r, v) (((unsigned int)(r) << 4) | ((v) & 0xf)) - -#define AUX_OBJECT 1 -#define AUX_FUNC 2 -/*#define BIND_LOCAL 0 not used */ -/*#define BIND_GLOBAL 1 not used */ -#define BIND_WEAK 2 - - /* - * The `section_dispatch_table' structure contains offsets to various data - * structures needed to do run-time relocation. - */ -struct section_dispatch_table { - struct so_map *sdt_loaded; /* List of loaded objects */ - long sdt_sods; /* List of shared objects descriptors */ - long sdt_paths; /* Library search paths */ - long sdt_got; /* Global offset table */ - long sdt_plt; /* Procedure linkage table */ - long sdt_rel; /* Relocation table */ - long sdt_hash; /* Symbol hash table */ - long sdt_nzlist; /* Symbol table itself */ - long sdt_filler2; /* Unused (was: stab_hash) */ - long sdt_buckets; /* Number of hash buckets */ - long sdt_strings; /* Symbol strings */ - long sdt_str_sz; /* Size of symbol strings */ - long sdt_text_sz; /* Size of text area */ - long sdt_plt_sz; /* Size of procedure linkage table */ -}; - -/* - * RRS symbol hash table, addressed by `sdt_hash' in section_dispatch_table. - * Used to quickly lookup symbols of the shared object by hashing - * on the symbol's name. `rh_symbolnum' is the index of the symbol - * in the shared object's symbol list (`sdt_nzlist'), `rh_next' is - * the next symbol in the hash bucket (in case of collisions). - */ -struct rrs_hash { - int rh_symbolnum; /* Symbol number */ - int rh_next; /* Next hash entry */ -}; - -/* - * `rt_symbols' is used to keep track of run-time allocated commons - * and data items copied from shared objects. - */ -struct rt_symbol { - struct nzlist *rt_sp; /* The symbol */ - struct rt_symbol *rt_next; /* Next in linear list */ - struct rt_symbol *rt_link; /* Next in bucket */ - caddr_t rt_srcaddr; /* Address of "master" copy */ - struct so_map *rt_smp; /* Originating map */ -}; - -/* - * Debugger interface structure. - */ -struct so_debug { - int dd_version; /* Version # of interface */ - int dd_in_debugger; /* Set when run by debugger */ - int dd_sym_loaded; /* Run-time linking brought more - symbols into scope */ - char *dd_bpt_addr; /* Address of rtld-generated bpt */ - int dd_bpt_shadow; /* Original contents of bpt */ - struct rt_symbol *dd_cc; /* Allocated commons/copied data */ -}; - -/* * Debug rendezvous struct. Pointer to this is set up in the * target code pointed by the DT_DEBUG tag. If it is * defined. @@ -198,83 +105,6 @@ unsigned long r_ldbase; /* Base address the linker is loaded at. */ }; -/* - * Entry points into ld.so - user interface to the run-time linker. - */ -struct ld_entry { - void *(*dlopen)(const char *, int); - int (*dlclose)(void *); - void *(*dlsym)(void *, const char *); - int (*dlctl)(void *, int, void *); - void (*dlexit)(void); - void (*dlrsrvd[3])(void); -}; - -/* - * This is the structure pointed at by the __DYNAMIC symbol if an - * executable requires the attention of the run-time link editor. - * __DYNAMIC is given the value zero if no run-time linking needs to - * be done (it is always present in shared objects). - * The union `d_un' provides for different versions of the dynamic - * linking mechanism (switched on by `d_version'). The last version - * used by Sun is 3. We leave some room here and go to version number - * 8 for NetBSD, the main difference lying in the support for the - * `nz_list' type of symbols. - */ - -struct _dynamic { - int d_version; /* version # of this interface */ - struct so_debug *d_debug; - union { - struct section_dispatch_table *d_sdt; - } d_un; - struct ld_entry *d_entry; /* compat - now in crt_ldso */ -}; - -#define LD_VERSION_SUN (3) -#define LD_VERSION_BSD (8) -#define LD_VERSION_NZLIST_P(v) ((v) >= 8) - -#define LD_GOT(x) ((x)->d_un.d_sdt->sdt_got) -#define LD_PLT(x) ((x)->d_un.d_sdt->sdt_plt) -#define LD_REL(x) ((x)->d_un.d_sdt->sdt_rel) -#define LD_SYMBOL(x) ((x)->d_un.d_sdt->sdt_nzlist) -#define LD_HASH(x) ((x)->d_un.d_sdt->sdt_hash) -#define LD_STRINGS(x) ((x)->d_un.d_sdt->sdt_strings) -#define LD_NEED(x) ((x)->d_un.d_sdt->sdt_sods) -#define LD_BUCKETS(x) ((x)->d_un.d_sdt->sdt_buckets) -#define LD_PATHS(x) ((x)->d_un.d_sdt->sdt_paths) - -#define LD_GOTSZ(x) ((x)->d_un.d_sdt->sdt_plt - (x)->d_un.d_sdt->sdt_got) -#define LD_RELSZ(x) ((x)->d_un.d_sdt->sdt_hash - (x)->d_un.d_sdt->sdt_rel) -#define LD_HASHSZ(x) ((x)->d_un.d_sdt->sdt_nzlist - (x)->d_un.d_sdt->sdt_hash) -#define LD_STABSZ(x) ((x)->d_un.d_sdt->sdt_strings - (x)->d_un.d_sdt->sdt_nzlist) -#define LD_PLTSZ(x) ((x)->d_un.d_sdt->sdt_plt_sz) -#define LD_STRSZ(x) ((x)->d_un.d_sdt->sdt_str_sz) -#define LD_TEXTSZ(x) ((x)->d_un.d_sdt->sdt_text_sz) - -/* - * Interface to ld.so - */ -struct crt_ldso { - int crt_ba; /* Base address of ld.so */ - int crt_dzfd; /* "/dev/zero" file descriptor (SunOS) */ - int crt_ldfd; /* ld.so file descriptor */ - struct _dynamic *crt_dp; /* Main's __DYNAMIC */ - char **crt_ep; /* environment strings */ - caddr_t crt_bp; /* Breakpoint if run from debugger */ - char *crt_prog; /* Program name (v3) */ - char *crt_ldso; /* Link editor name (v4) */ - struct ld_entry *crt_ldentry; /* dl*() access (v4) */ -}; - -/* - * Version passed from crt0 to ld.so (1st argument to _rtld()). - */ -#define CRT_VERSION_SUN 1 -#define CRT_VERSION_BSD_2 2 -#define CRT_VERSION_BSD_3 3 -#define CRT_VERSION_BSD_4 4 /*