aboutsummaryrefslogtreecommitdiff
path: root/include/link.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/link.h')
-rw-r--r--include/link.h287
1 files 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 <sys/types.h>
-
-struct link_map {
- caddr_t l_addr; /* Base Address of library */
-#ifdef __mips__
- caddr_t l_offs; /* Load Offset of library */
+#include <sys/link_elf.h>
+#else
+#include <sys/link_aout.h>
#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_ */