Use sys/link_elf.h or sys/link_aout.h based on compile environment
This commit is contained in:
peter
parent
ca8478f088
commit
e31269938a
287
include/link.h
287
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_ */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user