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441 Commits

Author SHA1 Message Date
mycroft
9e31b44846 There is no need to save and restore a second register window in the binder 
stub.
 2002-09-25 14:38:51 +00:00
mycroft
afb1082706 _rtld_bind_start_0_stub() is not actually used. 2002-09-25 14:36:37 +00:00
mycroft
028dd5150a Push a multiple from _rtld_bind_start_[01]() to _rtld_bind(). 2002-09-25 14:35:39 +00:00
mycroft
23b2275ee8 Partly fix this port -- still needs a self-reloc function. 2002-09-25 08:37:57 +00:00
mycroft
a9c999925c We don't need to save quite as many registers in the stub. 2002-09-25 08:00:26 +00:00
mycroft
729925dfb9 Push the _rtld_bind() interface into MD code -- it's just a trivial wrapper 
anyway.
 2002-09-25 07:27:49 +00:00
mycroft
305b0ffce5 #if defined -> #ifdef 2002-09-25 06:43:46 +00:00
mycroft
896795d8a3 Minor cleanup, for clarity. 2002-09-25 03:57:15 +00:00
mycroft
a3c903f7cb Resolve the GOT before doing relocations. Then, when doing relocations, for 
symbols in the global part of the symbol table, use the updated GOT entry
rather than doing a lookup.  (This provides the same effect as `-z combreloc'
on other platforms -- at most one lookup is done per symbol.)

Unfortunately, it is necessary to turn off lazy binding on MIPS.  As the
comment says:

                         * XXX DANGER WILL ROBINSON!
                         * You might think this is stupid, as it intentionally
                         * defeats lazy binding -- and you'd be right.
                         * Unfortunately, for lazy binding to work right, we
                         * need to a way to force the GOT slots used for
                         * function pointers to be resolved immediately.  This
                         * is supposed to be done automatically by the linker,
                         * by not outputting a PLT slot and setting st_value
                         * to 0, but GNU ld does not do so reliably.
 2002-09-25 03:52:06 +00:00
mycroft
646628d7fa DOH! Adjust all the stack slots in _rtld_bind_start() so that the saved $a0 
is not in _rtld_bind_mips()'s $a3 argument save area.
 2002-09-24 21:57:20 +00:00
mycroft
fb3dfbb81b Add a comment about the function pointer nonsense. 2002-09-24 20:27:07 +00:00
mycroft
216a20fcc4 Put back the `in_plt' nonsense for now. 
It turns out there is some deep-seated wackiness WRT function pointer
comparisons...
 2002-09-24 20:23:11 +00:00
mycroft
9d1d2c30c8 Reverse the previous patch, but make the dbg()s more informative. 2002-09-24 18:28:42 +00:00
mycroft
8510028476 Touch up a little more -- some of the dbg()s never actually printed anything. 2002-09-24 18:25:54 +00:00
mycroft
1ad20cb78f Previous change was done wrong. 2002-09-24 18:23:14 +00:00
junyoung
d0e76e42b6 G/c dbg()'s. 2002-09-24 18:03:46 +00:00
junyoung
5afbf1cbce Make sure that dbg() is disabled if LD_DEBUG is not defined. Now 
debugging is easier with RTLD_DEBUG_RELOC.
 2002-09-24 17:51:11 +00:00
mycroft
64d3d6215a Ignore JMP_SLOT relocs when doing non-PLT relocations. The relalim trimming 
hack doesn't always work, because ld(1) sometimes puts the sections in the
wrong order.
 2002-09-24 15:04:48 +00:00
mycroft
bddb0d021d Similarly, remove support for short arguments. 2002-09-24 14:09:43 +00:00
mycroft
fa344ccc4b Remove quad support. We don't need it, and it wastes a lot of space. (It 
pulls in {,u}{div,mod}di3() and qdivrem().)
 2002-09-24 14:05:33 +00:00
mycroft
56288dc0e5 %ld -> %p 2002-09-24 13:59:31 +00:00
mycroft
fa5df29420 Include xassert() only if DEBUG, like the real assert(). 
Also, xassert() calls abort(), so there's no need to do it in all of the
callers.
 2002-09-24 13:06:07 +00:00
mycroft
7f44855294 Remove the SVR4_LIBDIR madness. 2002-09-24 12:52:20 +00:00
mycroft
3c16ffb1dd Woops, unmap the first page in the `win' case, too. 
Tidy up a bit.
 2002-09-24 12:44:58 +00:00
mycroft
72b0e512c3 Change the comment about l_offs. 2002-09-24 12:18:32 +00:00
mycroft
9d8c69b929 Remove vestiges of VARPSZ. 2002-09-24 12:12:07 +00:00
junyoung
175c20cbcf Nuke PAGESIZE. 2002-09-24 09:45:59 +00:00
junyoung
4b4a707c66 Use _rtld_pagesz instead of PAGESIZE. 2002-09-24 09:35:13 +00:00
junyoung
d190613fbb space -> tab. 2002-09-24 09:26:43 +00:00
junyoung
93f2d9023a Don't need to use union any longer. 2002-09-24 09:22:51 +00:00
junyoung
272e959468 Remove '\n' at the end of dbg strings. 2002-09-24 08:56:30 +00:00
junyoung
61e1361da6 END_SYM is no longer used. 2002-09-24 06:43:14 +00:00
mycroft
97aed9957d -I${.CURDIR} is done at the top-level, so there's no need to do it here. 2002-09-24 01:59:44 +00:00
mycroft
b59c269424 Nuke reference to RTLD_RELOCATE_SELF. 2002-09-24 01:58:44 +00:00
mycroft
c3ece2a45f Use/require AT_PAGESZ on all platforms. (The kernel has exported it for ~3 
years now.)  Use _rtld_pagesz instead of getpagesize() to determine the page
size in our local malloc().  Saves a system call.

Also, since we're now relocated early, we don't need to be careful to avoid
globals, so most of the VARPSZ hacks are eliminated.
 2002-09-24 01:24:44 +00:00
mycroft
d1351c627c Um, a little bit of sanity here: 
l_addr is always supposed to be obj->relocbase -- or so says the GDB code that
uses it.  So, set it to this on all platforms.  It already was on VAX
explicitly, and on everything else except MIPS implicitly (because
mapbase==relocbase for all existing shlibs).  For some silly/stupid reason, a
new field was created that the MIPS GDB currently uses.
Another MD #ifdef bites it.
 2002-09-24 00:33:39 +00:00
mycroft
f1184d192e Very minor cleanup of the previous. 2002-09-24 00:02:46 +00:00
mycroft
86103e2f0e Several small changes that shave 7-8% off the simple-exec-loop test: 
* Rename _rtld_find_library() to _rtld_load_library().  It now calls
  _rtld_load_object() if necessary to actually load the object, rather
  than having the caller do it.  To do this, it also takes the `mode'
  argument that gets passed to _rtld_load_object().

* On a related note, remove _rtld_check_library(), and instead call
  _rtld_load_object() to instead try actually loading the object.  We
  save two extra namei's and a bunch of redundant work (almost
  literally the same code) this way.

* In _rtld_map_object(), mmap(2) the first page read-only, rather than
  read(2)ing it.

* In _rtld_symlook_obj(), compare the *second* character of the symbol
  name before calling strcmp().  (This first character is too
  frequently `_', and turns out to not be helpful, in libc.)

* Also in _rtld_symlook_obj(), remove the bogus STT_FUNC special case
  -- this also allows removing the `in_plt' argument to
  _rtld_symlook_list() and _rtld_symlook_obj().

Also:

* In _rtld_obj_from_addr(), rather than trying to look up `_end' in
  the each object, instead use obj->mapsize as the upper bound.
 2002-09-23 23:56:46 +00:00
mycroft
c3a2d8b7ba Add combreloc code here too. 2002-09-21 17:51:44 +00:00
junyoung
930998f892 Print the name of dynamic linker actually loaded. 2002-09-21 05:24:17 +00:00
junyoung
48910dcfc1 Cosmetic changes (long lines). 2002-09-20 03:39:22 +00:00
junyoung
18139870a5 Cosmetic changes. 2002-09-19 14:05:37 +00:00
christos
6d0f752a65 don't core dump setting progname if argv[0] == NULL. From xs@kittenz.org 2002-09-19 13:59:46 +00:00
junyoung
a5390eb121 _rtld_setup_pltgot() belongs to reloc.c. 2002-09-18 07:35:40 +00:00
junyoung
9754fa4d8e Make immediate binding work again by actually implementing 
_rtld_relocate_plt_objects(). Note that this is for i386 only;
any efforts to make it work on other platforms are left to
those who are using them...
 2002-09-17 07:29:46 +00:00
thorpej
7e6d181789 No PC24 relocs will ever be unaligned. Pointed out by mycroft. 2002-09-15 01:08:04 +00:00
thorpej
672853f217 It is possible for reloc entries to point to unaligned locations; handle 
this.
 2002-09-15 00:52:08 +00:00
thorpej
a2130a3a09 It is possible for reloc entries to point to unaligned locations; handle 
this.
 2002-09-14 23:53:21 +00:00
thorpej
b01748bb26 It is possible for reloc entries to point to unaligned locations; handle 
this.
 2002-09-14 23:21:13 +00:00
mycroft
a95d62a38e In _rtld_bind_mips(), if the symbol is undefined, die. 2002-09-13 20:32:24 +00:00
mycroft
712b838f43 Kill the extra newline in assert messages. 2002-09-13 19:50:00 +00:00
mycroft
cc2b1e9844 Add an explanatory comment. 2002-09-13 19:27:19 +00:00
mycroft
e3db70741f Turn DEBUG back on by default. It doesn't take much space. 2002-09-13 18:28:58 +00:00
mycroft
60330f4a69 The sense of the SHN_ABS test has always been reversed. Fortunately nobody 
ever tried to reference stuff like _DYNAMIC_LINK and _gp_disp in C code...
 2002-09-13 17:36:00 +00:00
mycroft
8f7fa0cfde Put back the lazy binding. For some bizarre reason, the linker occasionally 
does not create a PLT entry for a symbol, so we test st_value!=0 to see
whether we can do a PLT fixup.
 2002-09-13 17:07:12 +00:00
mycroft
a8dd8878cf Er, turn off lazy binding for the moment. It doesn't seem to be fully working. 2002-09-13 16:54:14 +00:00
mycroft
c1cf8538ec Simplify the GOT relocation code somewhat. 2002-09-13 16:31:28 +00:00
mycroft
e8b2fe1d2a Actually do lazy binding on this platform. 2002-09-13 16:03:20 +00:00
mycroft
89a39bb54e The textrel special case is only needed for MIPS (due to a bug in BFD). 2002-09-13 15:27:30 +00:00
mycroft
7a962f974a Kill the sparc64 argc conversion hack. 2002-09-13 14:23:07 +00:00
mycroft
a18c524897 Figure out obj->pltrel(a) after the dynamic section is parsed, so the relative 
order of DT_PLTREL and DT_JMPREL is irrelevant.  Removes the need for yet
another weird #ifdef.
Also, be slightly more careful with the rel(a)lim trimming.
 2002-09-13 13:28:43 +00:00
mycroft
c74fdd7069 Use the addend on GLOB_DAT relocs (same as ABS32). 2002-09-13 05:45:46 +00:00
mycroft
c65330320a Do not use the implicit addend on REFQUAD relocs (same as GLOB_DAT). 2002-09-13 05:45:13 +00:00
mycroft
daf8118731 Remove an old comment. 2002-09-13 04:09:49 +00:00
mycroft
2f59687514 Almost all of the items in here are done. 2002-09-13 04:05:00 +00:00
mycroft
777a2b8bb0 If we match a symbol name, but it's undefined, do not continue searching the 
hash chain.
 2002-09-13 03:40:40 +00:00
mycroft
bbe45a0623 Remove a dumb #ifdef -- if VARPSZ is not defined on sparc, the build will 
bomb anyway.
 2002-09-13 03:22:08 +00:00
mycroft
4de09f873b Nuke an unneeded hack for the Alpha. 2002-09-13 03:17:21 +00:00
mycroft
807a6ace45 Nuke two frivolous assert()s. 2002-09-13 03:12:40 +00:00
mycroft
4b55da479c _rtld_bind() is not used on MIPS. Should probably move it to MD code. 2002-09-13 03:09:38 +00:00
mycroft
f64e457cee Remove one more `dodebug' argument. 2002-09-12 23:11:37 +00:00
mycroft
a3b892d178 Nuke -DRTLD_RELOCATE_SELF and `dodebug' from orbit. 2002-09-12 22:56:28 +00:00
mycroft
f13bdd9850 Add some consts. 2002-09-12 21:06:38 +00:00
mycroft
5ad776fbd2 Move another declaration that doesn't belong in MI source. 2002-09-12 20:27:34 +00:00
mycroft
de4565ee93 Prototype different functions. 2002-09-12 20:24:03 +00:00
mycroft
547bc13b97 _rtld_bind_start() is not used in MI code, so declare it in the MD code. 2002-09-12 20:20:58 +00:00
mycroft
bf04efbfda ld.elf_so has no textrels on arm, i386 or vax -- and shouldn't on any platform, 
but that's beside the point.
 2002-09-12 19:43:03 +00:00
mycroft
6530c89689 Slight tweak. 2002-09-12 18:43:17 +00:00
mycroft
326f270bfb The GOT is Elf_Addr[], not Elf_Word[]... 2002-09-12 18:36:43 +00:00
mycroft
6f0bda739f This ld script is now unnecessary. 2002-09-12 18:33:39 +00:00
mycroft
1165ce6f38 Clean up a little. 2002-09-12 18:28:53 +00:00
mycroft
2346aaad04 Move GOT relocation code from _rtld_setup_pltgot() to 
_rtld_relocate_nonplt_objects().  Add GOT self-relocation in
_rtld_relocate_nonplt_self().
MIPS ld.elf_so can now relocate itself.
 2002-09-12 18:21:18 +00:00
mycroft
2b2534febf Add a `relocbase' argument to _rtld() and _rtld_init(), which is passed in 
from the glue code in _rtld_start().  This is used to set objself.relocbase,
rather than assuming that it's the same as objself.mapbase (or 0 on MIPS).
Now -- with a bug fix to the kernel -- ld.elf_so can be linked at any VMA.
 2002-09-12 17:45:41 +00:00
mycroft
d04429c6a7 Figure out the relocation offset and pass it to _rtld(). 2002-09-12 17:43:30 +00:00
mycroft
ebf50cdfbc Update comments. 2002-09-12 17:18:37 +00:00
mycroft
ac81e3266b Snapshot of work to make MIPS ld.elf_so relocatable. 2002-09-12 17:08:32 +00:00
mycroft
5ee0e5e1c4 Pass the calculated relocation offset down to _rtld(). 2002-09-12 17:07:25 +00:00
bjh21
3cc5ae01bc Correct somewhere where, in rev 1.3, two new sentences had been dropped 
into the middle of an existing sentence, and put them after it instead.
 2002-09-11 23:11:41 +00:00
mycroft
1da1ca49f2 Do the _rtld_relocate_nonplt_self() thing here, and nuke the ld script. 2002-09-11 22:28:32 +00:00
mycroft
fb69b8bec4 Implement _rtld_relocate_nonplt_self() here. 2002-09-11 21:14:08 +00:00
mycroft
a57ae642a3 We don't use _GLOBAL_OFFSET_TABLE_ any more, so don't .global it. 2002-09-11 20:56:09 +00:00
mycroft
fa0b5c37b2 This is a gratuitous null commit to force rtld.o to be rebuilt. 2002-09-11 20:48:21 +00:00
mycroft
f1725abea5 Add a _rtld_relocate_nonplt_self() here too. 2002-09-11 20:45:52 +00:00
mycroft
403e42f619 Do self-relocation similar to sparc. 2002-09-11 19:46:40 +00:00
mycroft
e46eb805f1 This ld script is no longer necessary. 2002-09-11 19:46:04 +00:00
mycroft
aa1330ce71 Do the _rtld_relocate_nonplt_self() thing for SPARC. 2002-09-11 19:11:05 +00:00
mycroft
82148aec74 The ld script is no longer necessary. 2002-09-11 18:20:47 +00:00
mycroft
d603bed369 Implement _rtld_relocate_nonplt_self() on Alpha. 2002-09-11 18:18:37 +00:00
mycroft
735f9f38c0 Split the `self' case out of _rtld_relocate_nonplt_objects, into a new function 
_rtld_relocate_nonplt_self(), which is called from _rtld_start.
Now we're completely relocated before main() is called.
We also no longer need _GOT_END_, so junk the ld script.

This code assumes that ld.elf_so only contains RELATIVE relocs, but that's
supposed to be the case for -Bsymbolic anyway.
 2002-09-11 17:23:23 +00:00
junyoung
b240241362 Add $NetBSD$. 2002-09-11 14:19:30 +00:00