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* Makerules ($(common-objpfx)libc.so): Depend on $(elfobjdir)/ld.so.

Browse Source 
* elf/dl-close.c: New file.
	* elf/link.h: Declare _dl_close.
	* elf/Makefile (routines): Add dl-close.
	* elf/dlclose.c (dlclose): Use _dl_close.

	* elf/Makefile ($(objpfx)librtld.so): Remove libelf from deps.

	* elf/dl-runtime.c (_dl_global_scope): New variable.
	(_dl_object_relocation_scope): New function.
	(fixup): Use it.
	* elf/rtld.c (dl_main): Use it.
	* elf/dl-open.c (_dl_open): Use it.  If (MODE & RTLD_GLOBAL), set the
	l_global bit and append the new map to _dl_global_scope.
	* elf/link.h: Declare _dl_global_scope, _dl_global_scope_alloc,
	and _dl_object_relocation_scope.

	* elf/link.h (struct link_map): Add l_loader member.
	Remove _dl_map_object_from_fd decl.
	* elf/dl-load.c (_dl_map_object): Pass LOADER to ...
	(_dl_map_object_from_fd): Take new arg LOADER and set l_loader member.
	(_dl_map_object): Try DT_RPATH from all loaders up the chain.

	* elf/dl-object.c (_dl_loaded): Variable removed.
	(_dl_default_scope): New variable replaces it.
	* elf/link.h (_dl_loaded): Remove variable decl; instead define as
	macro for _dl_default_scope[2].
	(_dl_default_scope): Declare it.
	* sysdeps/i386/dl-machine.h (RTLD_START): Use _dl_default_scope[2]
	instead of _dl_loaded.
	* sysdeps/m68k/dl-machine.h (RTLD_START): Likewise.
	* elf/rtld.c (dl_main): Use _dl_default_scope for symbol lookups.

	* elf/dl-reloc.c (_dl_relocate_object): Remove check for _dl_rtld_map.
	* elf/rtld.c (dl_main): Pass 0 for LAZY flag when re-relocating self.

	* elf/link.h (struct link_map.l_type): Remove lt_interpreter.
 	(struct link_map): Add new flag member l_global.

	* elf/dl-reloc.c (_dl_relocate_object): Check for _dl_rtld_map
	directly instead of looking for lt_interpreter.
	* sysdeps/i386/dl-machine.h (elf_machine_rel): Likewise.
	* elf/rtld.c (_dl_start): Don't bother setting BOOTSTRAP_MAP.l_type.
	(dl_main): Set _dl_rtld_map.l_type to lt_library.

	* elf/dl-deps.c (_dl_map_object_deps): Propagate MAP->l_type to
	dependencies loaded, downgrading lt_executable -> lt_library.

	* elf/dl-load.c (_dl_map_object_from_fd): Take new arg TYPE and set
	l_type from that, translating lt_library->lt_executable based on the
	file's ELF type.
	(_dl_map_object): Likewise.
	* elf/link.h: Update prototypes.
	* elf/dl-open.c: Pass type lt_loaded.
	* elf/rtld.c: Pass type lt_library.

	* elf/dl-load.c (_dl_map_object_from_fd): Handle null return from
	_dl_new_object.
	(_dl_map_object_from_fd: lose): Unchain and free L if it's not null.
	Free REALNAME, and just use NAME in error message.
	* elf/dl-object.c (_dl_new_object): If malloc fails, return null
	instead of calling _dl_signal_error.

	* elf/dl-load.c (_dl_map_object_from_fd): Close FD before signalling
	error for _dl_zerofd setup failure.

	* elf/dl-object.c (_dl_startup_loaded): Variable removed.
	* elf/link.h: Remove its decl.

	* elf/dl-reloc.c (_dl_relocate_object): Take new SCOPE arg and pass it
	through to _dl_lookup_symbol.
	* elf/link.h (_dl_relocate_object): Update comment and prototype.
	* elf/rtld.c (dl_main): Pass scope vector to _dl_relocate_object.

	* elf/dl-lookup.c (_dl_lookup_symbol): Arg SYMBOL_SCOPE is now a
	null-terminated vector of pointers, no longer a vector of exactly two.
	* elf/link.h (_dl_lookup_symbol): Update comment and prototype.

	* elf/dl-runtime.c (fixup): Set up scope for symbol lookup properly as
	done in _dl_relocate_object.

	* elf/dlopen.c: Pass "" to _dl_open when FILE is null.
This commit is contained in:
Roland McGrath
1996-06-10 20:19:39 +00:00
parent 567c63af19
commit ba79d61b44
17 changed files with 659 additions and 391 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
elf/dl-reloc.c
View File

@@ -26,7 +26,7 @@ Cambridge, MA 02139, USA. */
void
_dl_relocate_object (struct link_map *l, int lazy)
_dl_relocate_object (struct link_map *l, struct link_map *scope[], int lazy)
{
if (l->l_relocated)
return;
@@ -52,44 +52,26 @@ _dl_relocate_object (struct link_map *l, int lazy)
}
{
struct link_map *scope[2];
/* Do the actual relocation of the object's GOT and other data. */
const char *strtab
const char *strtab /* String table object symbols. */
= ((void *) l->l_addr + l->l_info[DT_STRTAB]->d_un.d_ptr);
ElfW(Addr) resolve (const ElfW(Sym) **ref,
ElfW(Addr) reloc_addr, int noplt)
{
/* Look up the referenced symbol in the specified scope. */
return _dl_lookup_symbol (strtab + (*ref)->st_name, ref, scope,
l->l_name, reloc_addr, noplt);
}
if (l->l_info[DT_SYMBOLIC])
{
scope[0] = l;
scope[1] = _dl_loaded;
}
else
{
scope[0] = _dl_loaded;
scope[1] = l;
}
if (l->l_type == lt_interpreter)
/* We cannot be lazy when relocating the dynamic linker itself. It
was previously relocated eagerly (allowing us to be running now),
and needs always to be fully relocated so it can run without the
aid of run-time fixups (because it's the one to do them), so we
must always re-relocate its PLT eagerly. */
lazy = 0;
ELF_DYNAMIC_RELOCATE (l, lazy, resolve);
}
/* Set up the PLT so its unrelocated entries will
jump to _dl_runtime_resolve, which will relocate them. */
/* Set up the PLT so its unrelocated entries will jump to
_dl_runtime_resolve (dl-runtime.c), which will relocate them. */
elf_machine_runtime_setup (l, lazy);
/* Mark the object so we know ths work has been done. */
l->l_relocated = 1;
if (l->l_info[DT_TEXTREL])
@@ -114,5 +96,4 @@ _dl_relocate_object (struct link_map *l, int lazy)
"can't restore segment prot after reloc");
}
}
}