d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Minor changes to make this work on sparc64.

Browse Source 
Approved by:	jdp
Tested on:	alpha, i386, sparc64
This commit is contained in:
Jake Burkholder 2002-04-02 02:19:02 +00:00
parent 6c35e80948
commit 2da08e795e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=93610
1 changed files with 46 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

79
libexec/rtld-elf/rtld.c
View File

@ -73,7 +73,7 @@ typedef struct Struct_DoneList {
*/
static const char *basename(const char *);
static void die(void);
static void digest_dynamic(Obj_Entry *);
static void digest_dynamic(Obj_Entry *, int);
static Obj_Entry *digest_phdr(const Elf_Phdr *, int, caddr_t, const char *);
static Obj_Entry *dlcheck(void *);
static bool donelist_check(DoneList *, const Obj_Entry *);
@ -104,7 +104,7 @@ static void objlist_push_head(Objlist *, Obj_Entry *);
static void objlist_push_tail(Objlist *, Obj_Entry *);
static void objlist_remove(Objlist *, Obj_Entry *);
static void objlist_remove_unref(Objlist *);
static int relocate_objects(Obj_Entry *, bool);
static int relocate_objects(Obj_Entry *, bool, Obj_Entry *);
static void rtld_exit(void);
static char *search_library_path(const char *, const char *);
static const void **get_program_var_addr(const char *name);
@ -342,7 +342,7 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entry **objp)
obj_rtld.path = xstrdup(obj_main->interp);
}
digest_dynamic(obj_main);
digest_dynamic(obj_main, 0);
linkmap_add(obj_main);
linkmap_add(&obj_rtld);
@ -378,7 +378,7 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entry **objp)
}
if (relocate_objects(obj_main,
ld_bind_now != NULL && *ld_bind_now != '\0') == -1)
ld_bind_now != NULL && *ld_bind_now != '\0', &obj_rtld) == -1)
die();
dbg("doing copy relocations");
@ -513,7 +513,7 @@ die(void)
* information in its Obj_Entry structure.
*/
static void
digest_dynamic(Obj_Entry *obj)
digest_dynamic(Obj_Entry *obj, int early)
{
const Elf_Dyn *dynp;
Needed_Entry **needed_tail = &obj->needed;
@ -635,13 +635,16 @@ digest_dynamic(Obj_Entry *obj)
case DT_DEBUG:
/* XXX - not implemented yet */
dbg("Filling in DT_DEBUG entry");
if (!early)
dbg("Filling in DT_DEBUG entry");
((Elf_Dyn*)dynp)->d_un.d_ptr = (Elf_Addr) &r_debug;
break;
default:
dbg("Ignoring d_tag %ld = %#lx", (long)dynp->d_tag,
(long)dynp->d_tag);
if (!early) {
dbg("Ignoring d_tag %ld = %#lx", (long)dynp->d_tag,
(long)dynp->d_tag);
}
break;
}
}
@ -854,7 +857,17 @@ find_symdef(unsigned long symnum, const Obj_Entry *refobj,
hash = elf_hash(name);
defobj = NULL;
def = symlook_default(name, hash, refobj, &defobj, in_plt);
/* Handle STT_SECTION specially. */
if (ELF_ST_TYPE(ref->st_info) == STT_SECTION) {
if (ELF_ST_BIND(ref->st_info) != STB_LOCAL ||
ref->st_shndx != symnum) {
_rtld_error("%s: Bogus symbol table entry %lu", refobj->path,
symnum);
}
def = ref;
defobj = refobj;
} else
def = symlook_default(name, hash, refobj, &defobj, in_plt);
/*
* If we found no definition and the reference is weak, treat the
@ -949,43 +962,42 @@ init_dag1(Obj_Entry *root, Obj_Entry *obj, DoneList *dlp)
static void
init_rtld(caddr_t mapbase)
{
Obj_Entry objtmp; /* Temporary rtld object */
/*
* Conjure up an Obj_Entry structure for the dynamic linker.
*
* The "path" member is supposed to be dynamically-allocated, but we
* aren't yet initialized sufficiently to do that. Below we will
* replace the static version with a dynamically-allocated copy.
* The "path" member can't be initialized yet because string constatns
* cannot yet be acessed. Below we will set it correctly.
*/
obj_rtld.path = PATH_RTLD;
obj_rtld.rtld = true;
obj_rtld.mapbase = mapbase;
objtmp.path = NULL;
objtmp.rtld = true;
objtmp.mapbase = mapbase;
#ifdef PIC
obj_rtld.relocbase = mapbase;
objtmp.relocbase = mapbase;
#endif
if (&_DYNAMIC != 0) {
obj_rtld.dynamic = rtld_dynamic(&obj_rtld);
digest_dynamic(&obj_rtld);
assert(obj_rtld.needed == NULL);
assert(!obj_rtld.textrel);
objtmp.dynamic = rtld_dynamic(&objtmp);
digest_dynamic(&objtmp, 1);
assert(objtmp.needed == NULL);
assert(!objtmp.textrel);
/*
* Temporarily put the dynamic linker entry into the object list, so
* that symbols can be found.
*/
obj_list = &obj_rtld;
obj_tail = &obj_rtld.next;
obj_count = 1;
relocate_objects(&obj_rtld, true);
relocate_objects(&objtmp, true, &objtmp);
}
/* Make the object list empty again. */
obj_list = NULL;
/* Initialize the object list. */
obj_tail = &obj_list;
obj_count = 0;
/* Now that non-local variables can be accesses, copy out obj_rtld. */
memcpy(&obj_rtld, &objtmp, sizeof(obj_rtld));
/* Replace the path with a dynamically allocated copy. */
obj_rtld.path = xstrdup(obj_rtld.path);
obj_rtld.path = xstrdup(PATH_RTLD);
r_debug.r_brk = r_debug_state;
r_debug.r_state = RT_CONSISTENT;
@ -1174,7 +1186,7 @@ load_object(char *path)
}
obj->path = path;
digest_dynamic(obj);
digest_dynamic(obj, 0);
*obj_tail = obj;
obj_tail = &obj->next;
@ -1370,12 +1382,12 @@ objlist_remove_unref(Objlist *list)
* or -1 on failure.
*/
static int
relocate_objects(Obj_Entry *first, bool bind_now)
relocate_objects(Obj_Entry *first, bool bind_now, Obj_Entry *rtldobj)
{
Obj_Entry *obj;
for (obj = first; obj != NULL; obj = obj->next) {
if (obj != &obj_rtld)
if (obj != rtldobj)
dbg("relocating \"%s\"", obj->path);
if (obj->nbuckets == 0 || obj->nchains == 0 || obj->buckets == NULL ||
obj->symtab == NULL || obj->strtab == NULL) {
@ -1395,7 +1407,7 @@ relocate_objects(Obj_Entry *first, bool bind_now)
}
/* Process the non-PLT relocations. */
if (reloc_non_plt(obj, &obj_rtld))
if (reloc_non_plt(obj, rtldobj))
return -1;
if (obj->textrel) { /* Re-protected the text segment. */
@ -1595,7 +1607,8 @@ dlopen(const char *name, int mode)
}
if (result == -1 ||
(init_dag(obj), relocate_objects(obj, mode == RTLD_NOW)) == -1) {
(init_dag(obj), relocate_objects(obj, mode == RTLD_NOW,
&obj_rtld)) == -1) {
obj->dl_refcount--;
unref_dag(obj);
if (obj->refcount == 0)