From 0685b26b97a1719dba5df2d11e95d7b751825e5b Mon Sep 17 00:00:00 2001 From: Peter Wemm Date: Thu, 22 Aug 2002 20:37:30 +0000 Subject: [PATCH] Use sys/link_elf.h or sys/link_aout.h based on compile environment --- include/link.h | 287 +------------------------------------------------ 1 file changed, 3 insertions(+), 284 deletions(-) diff --git a/include/link.h b/include/link.h index 6222bafc969b..6282db9f9092 100644 --- a/include/link.h +++ b/include/link.h @@ -30,289 +30,8 @@ * $FreeBSD$ */ -/* - * 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_ - #if (defined(FREEBSD_ELF) || defined(__ELF__)) && !defined(FREEBSD_AOUT) - -#include - -struct link_map { - caddr_t l_addr; /* Base Address of library */ -#ifdef __mips__ - caddr_t l_offs; /* Load Offset of library */ +#include +#else +#include #endif - const char *l_name; /* Absolute Path to Library */ - const void *l_ld; /* Pointer to .dynamic in memory */ - struct link_map *l_next, *l_prev; /* linked list of of mapped libs */ -}; - -struct r_debug { - int r_version; /* not used */ - struct link_map *r_map; /* list of loaded images */ - void (*r_brk)(struct r_debug *, struct link_map *); - /* pointer to break point */ - enum { - RT_CONSISTENT, /* things are stable */ - RT_ADD, /* adding a shared library */ - RT_DELETE /* removing a shared library */ - } r_state; -}; - -#else /* !__ELF__ */ - -struct dl_info; - -/* - * A `Shared Object Descriptor' describes a shared object that is needed - * to complete the link edit process of the object containing it. - * A list of such objects (chained through `sod_next') is pointed at - * by `sdt_sods' in the section_dispatch_table structure. - */ - -struct sod { /* Shared Object Descriptor */ - long sod_name; /* name (relative to load address) */ - u_int sod_library : 1, /* Searched for by library rules */ - sod_reserved : 31; - short sod_major; /* major version number */ - short sod_minor; /* minor version number */ - long sod_next; /* next sod */ -}; - -/* - * `Shared Object Map's are used by the run-time link editor (ld.so) to - * keep track of all shared objects loaded into a process' address space. - * These structures are only used at run-time and do not occur within - * the text or data segment of an executable or shared library. - */ -struct so_map { /* Shared Object Map */ - caddr_t som_addr; /* Address at which object mapped */ - char *som_path; /* Path to mmap'ed file */ - struct so_map *som_next; /* Next map in chain */ - struct sod *som_sod; /* Sod responsible for this map */ - caddr_t som_sodbase; /* Base address of this sod */ - u_int som_write : 1; /* Text is currently writable */ - struct _dynamic *som_dynamic; /* _dynamic structure */ - 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 - -/* - * 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 */ -}; - -/* - * Version returned to crt0 from ld.so - */ -#define LDSO_VERSION_NONE 0 /* FreeBSD2.0, 2.0.5 */ -#define LDSO_VERSION_HAS_DLEXIT 1 /* includes dlexit in ld_entry */ -#define LDSO_VERSION_HAS_DLSYM3 2 /* includes 3-argument dlsym */ -#define LDSO_VERSION_HAS_DLADDR 3 /* includes dladdr in ld_entry */ - -/* - * Entry points into ld.so - user interface to the run-time linker. - * Entries are valid for the given version numbers returned by ld.so - * to crt0. - */ -struct ld_entry { - void *(*dlopen)(const char *, int); /* NONE */ - int (*dlclose)(void *); /* NONE */ - void *(*dlsym)(void *, const char *); /* NONE */ - const char *(*dlerror)(void); /* NONE */ - void (*dlexit)(void); /* HAS_DLEXIT */ - void *(*dlsym3)(void *, const char *, void *); /* HAS_DLSYM3 */ - int (*dladdr)(const void *, struct dl_info *); /* HAS_DLADDR */ -}; - -/* - * 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; /* XXX */ -}; - -#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) */ - char **crt_argv; /* argument strings (v5) */ -}; - -/* - * 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 -#define CRT_VERSION_BSD_5 5 - -/* - * Maximum number of recognized shared object version numbers. - */ -#define MAXDEWEY 8 - -/* - * Header of the hints file. - */ -struct hints_header { - long hh_magic; -#define HH_MAGIC 011421044151 - long hh_version; /* Interface version number */ -#define LD_HINTS_VERSION_1 1 -#define LD_HINTS_VERSION_2 2 - long hh_hashtab; /* Location of hash table */ - long hh_nbucket; /* Number of buckets in hashtab */ - long hh_strtab; /* Location of strings */ - long hh_strtab_sz; /* Size of strings */ - long hh_ehints; /* End of hints (max offset in file) */ - long hh_dirlist; /* Colon-separated list of srch dirs */ -}; - -#define HH_BADMAG(hdr) ((hdr).hh_magic != HH_MAGIC) - -/* - * Hash table element in hints file. - */ -struct hints_bucket { - /* namex and pathx are indices into the string table */ - int hi_namex; /* Library name */ - int hi_pathx; /* Full path */ - int hi_dewey[MAXDEWEY]; /* The versions */ - int hi_ndewey; /* Number of version numbers */ -#define hi_major hi_dewey[0] -#define hi_minor hi_dewey[1] - int hi_next; /* Next in this bucket */ -}; - -#define _PATH_LD_HINTS "/var/run/ld.so.hints" - -#endif /* !__ELF__ */ - -#endif /* _LINK_H_ */