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From Atsushi Nemoto.
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64bit MIPS ELF format tweaks. (from glibc)
Elf32/ElfW convertions.
asm code adjustments.
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create some default macros for do_rem/do_div_10 so we dont duplicate the samething in many arch header files
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specific header file to make porting/updates a lot easier
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the default
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syscall.h should not have it's own version of __set_errno, instead syscall.h should
include errno.h(see powerpc) since errno handling depends on threads/no threads.
I leave the the fixing of syscall.h since there might be some smaller compile problems.
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dl-syscalls.h
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its requirements about initial bootstrapping
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the name of our mips resolver function to match gdb's expectations.
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where possible. This will also make ldso smaller.
However the patch touches all archs and I have only tested PPC and x86.
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execution of ldso.
Added new asm for MIPS to be tested.
All arches should retest.
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Add elf_machine_dynamic() and elf_machine_load_address() for
all archs. elf_machine_dynamic() replaces the #ifdef mess to
get at the GOT. elf_machine_load_address() is needed to execute
ldso directly, this is not complete yet.
I probably broke one or two archs(only tested PPC) so please
try and report problems. For a report to be useful you need
to enable __SUPPORT_LD_DEBUG_EARLY__ and __SUPPORT_LD_DEBUG__
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Mips did not honour the LD_BIND_NOW env. variable or the DT_BIND_NOW flag
in the dynamic section.
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Andrew de Quincey, who has been most helpful getting this sorted
out, thanks. Thanks also to Peter Mazinger who did alot of testing.
Removed all traces of dl_parse_copy_information() since it is no longer used.
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- Replace all open coded dynamic handling with a function. Reduces size.
- Fold special MIPS dynamic code into the dynamic_info item.
- Add RELRO support.
- Support linking with "-z now".
- prepare for DT_RELACOUNT/DT_RELCOUNT optimization.
- Add -z now to ld.so linking, this is what ld.so does anyway so
let the linker know that.
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the whole lot in a single pass.
-Erik
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only the global GOT entry relocations for the loaded shared libs were being
handled. This made applications segfault when using un-fixedup symbols. After
many hours debugging to track down the problem, this patch makes the mips port
happy again.
-Erik
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Hi Manuel & Erik
I think I know why MIPS is broken. _dl_perform_mips_global_got_relocations() is
broken. It will due to my latest changes reloctate ldso. This
function needs to die and its job should be done inside _dl_parse_relocation_information().
It is mostly a copy and paste job,
Also PERFORM_BOOTSTRAP_GOT and PERFORM_BOOTSTRAP_RELOCATION should be fixed, they
use symbols which aren't passed as arguments.
Jocke
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Remove unused function parameter in ldso.
Remove echo option '-e' since it is not supported on Solaris.
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is needed if ldso should use libcs malloc whenever possible.
Fix RTLD_LAZY propagation to RTLD_NOW relocation when requested by
libdl.
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Hi yet again :)
in dl-startup.c when performing boot strap relocation the following test
exists to make sure that only "_dl_" symbols are relocated:
/* We only do a partial dynamic linking right now. The user
is not supposed to define any symbols that start with a
'_dl', so we can do this with confidence. */
if (!symname || !_dl_symbol(symname)) {
continue;
}
However on PPC(and the other archs as well I suspect) all symbols are
"_dl_" symbols so the test is never true. The test can be removed and the
whole loop simplified(smaller). This also makes it possible to
simplify elfinterp.c
This remove the scanning of ldso.so relocs, making relocation faster.
I have tested this on PPC and it works well.
Do you think this optimization will work for the other arches as well?
I can't see why not.
Jocke
* Tested on x86, arm, mipsel, and powerpc by Erik and works nicely
-Erik
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Since MIPS don't have COPY relocs it seems apropiate to define
DL_NO_COPY_RELOCS. This will optimize dl_find_hash somewhat.
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Glibc does not use COPY class for SHN_COMMOM in MIPS. Make uClibc ldso
the same.
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useful syscall failure diagnostics.
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If I change that ELF_RTYPE_CLASS_COPY to ELF_RTYPE_CLASS_PLT to tell
_dl_find_hash to ignore stubs when resolving undefined functions without
stubs, the dlopen tests all pass. dlopen gets a pointer to the libc.so
malloc instead of a pointer to the libpthread malloc stub. Yay! :-)
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mips mostly working. From there, I tracked the bash failure to a
bad _dl_atexit address and Erik took it from there.
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Begin converting some big ugly macros to inline functions
instead
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Also, if you are to enable SUPPORT_LD_DEBUG on MIPS, I think this
patch is needed too.
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Hi it is me again.
This is the latest ldso patch. the NEW weak symbol handling works now
with a little special handling in _dl_find_hash(). You get to chose
if you want the new or old handling :)
There was 2 missing _dl_check_if_named_library_is_loaded() calls in _dlopen().
I then disabled the _dl_check_if_named_library_is_loaded() in dl-elf.c since
it is rendundant.
Question, why does some _dl_linux_resolver(), like i386, have 2 calls
to _dl_find_hash()? I think that is wrong, isn't it?
I really hope you can check this out soon ...
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