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install.patch:
* Define $(INSTALL) as install in Rules.mak.
* Change all occurrences of install into $(INSTALL).
* Change all occurrences of mkdir -p into $(INSTALL) -d.
install -d is already used in a number of places so
this should not be an additional compatibility problem.
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_dl_check_if_named_library_is_loaded function
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path to the target library
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* Assign insead of add when doing relocations.
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a gcc 2.95 compiler problem on powerpc.
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Hello,
my patch changed the format of the ldso debug output to the same
format as on the i386 systems.
By Stefan
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checking for duplicates and returning an alias if an existing lib
is already loaded is still correct for the dlopen case.
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different than all other arches.
-Erik
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things, now that I have cleaned up the code to be a bit less horribly messy.
With this, the shared lib loader works on mips once again.
-Erik
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up badly if still present...
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libraries multiple times, wasting memory and causing different libraries to use
different symbol sets, some of which were not properly resolved.
Continue scrubbing ld.so and converting it to use proper types.
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pointer. Fix printing of '0x0x' in ldd output. Simplify discrimination of
libname, so doing things like dlopen("./libfoo.so",RTLD_NOW) with a leading
"./" in the path will work as expected.
-Erik
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it compiles properly with gcc 3.3.
-Erik
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what the problem library is that is linked vs glibc.
-Erik
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shared lib loader to do the work) when it is possible to do
so, and only go poking about through the ELF headers when that
fails so we can still use 'ldd' on cross compiled stuff.
-Erik
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process. Fix that up too.
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Mips gdb support for pthreads and similar complex stuff is broken, but then it
couldn't have worked before either...
-Erik
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the shared lib loader on mips to puke...
-Erik
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lib loader to make it more obvious what is wrong when things puke
early on in the process.
-Erik
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some other minor warnings.
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under the LGPL. I noticed Steven J. Hill has accidentally changed the license
to be GPL. Per email with him, change it back to LGPL.
Erik Andersen wrote:
>I just noticed that uClibc/ldso/ldso/mips/resolve.S is
>listed as licensed under the GPL, rather than the LGPL
>like the rest of uClibc. Accident?
>
Yes. Feel free to change it.
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type of 'struct stat' and 'struct stat64' so they use consistant types.
This change is the result of a bug I found while trying to use GNU tar. The
problem was caused by our using kernel types within struct stat and trying to
directly compare these values with standard types. Trying an 'if (a < b)' when
'a' is an 'unsigned long' and 'b' is an 'int' leads to very different results
then when comparing entities of the same type (i.e. time_t values)....
Grumble. Nasty stuff, but I'm glad I got this out of the way now.
As a result of this fix, uClibc 0.9.17 will not be binary compatible with
earlier releases. I have always warned people this can and will happen.
-Erik
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dlopen and have it be successful. This required moving some
things out of ldso.c into readelflib1.c, and directly including
hash.c and readelflib1.c into dlib.c when building the static
version of the library.
-Erik
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linked stuff, so put it back but add a check for NULL
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- Invert all FORCE_SHAREABLE_TEXT_SEGMENTS checks.
- Define FORCE_SHAREABLE_TEXT_SEGMENTS in the Makefile,
so it can be configured by the config system.
- linuxelf.h inspects that we don't combine FORCE_SHAREABLE_TEXT_SEGMENTS
and SVR4_BUGCOMPAT
- Add a new config option for FORCE_SHAREABLE_TEXT_SEGMENTS
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the more clear FORCE_SHAREABLE_TEXT_SEGMENTS.
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I fixed two little bugs in ldso.c:
- For LDD support we test the old environment variable
LD_TRACE_LOADED_OBJECTS.
- Before we init the GOT table of the dynamic loader
we have to check, if we have a DT_PLTGOT entry.
If DT_PLTGOT was zero we patch somthing in the header
of the dynamic loader. This was the cause, why we have to
enable the DO_MPROTECT_HACKS option for all targets, to avoid
segment faults.
In readelflib1.c I added a warning, if we try to load a shared library, which
wasn't compiled with -fPIC or -fpic. So if we disable the DO_MPROTECT_HACKS
option we are sure, that we don't waste memory by shared libraries which
aren't able to share their text segment. I think this is a helpful option on
little embedded systems.
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-Erik
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Ok, now i got it after a day of work.
I have had a look into glibc and found the following:
sysdeps/powerpc/dl-machine.c:
...
case R_PPC_JMP_SLOT:
/* It used to be that elf_machine_fixup_plt was used here,
but that doesn't work when ld.so relocates itself
for the second time. On the bright side, there's
no need to worry about thread-safety here. */
{
Elf32_Sword delta = finaladdr - (Elf32_Word) reloc_addr;
...
The comment made me suspicious. The same position in uClibc looks like this:
ldso/ldso/powerpc/elfinterp.c:
...
case R_PPC_JMP_SLOT:
{
unsigned long targ_addr = (unsigned long)_dl_linux_resolve;
int delta = targ_addr - (unsigned long)reloc_addr;
...
When I change it to the following it works:
...
case R_PPC_JMP_SLOT:
{
unsigned long targ_addr = *reloc_addr;
int delta = targ_addr - (unsigned long)reloc_addr;
...
I hope it will not break anything. Can anyone review this change and
commit it into CVS?
thanks,
ron
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this is the last patch, we need to make the support of multitarget libgcc
complete.
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In ldso/ldso/Makefile
I added the CPU_LDFLAGS-y to the LDFLAGS
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In libc/Makefile
I set the LDFLAGS for the script get-needed-objects.sh with CPU_LDFLAGS-y
---------------------------------
In extra/scripts/get-needed-object.sh
we now use the LIBGCC from Rules.mak and call LD with LDFLAGS
(==CPU_LDFLAGS-y). Addtionally I grep the NM output, to fix the unresolved
external __GLOBAL_OFFSET_TABLE__ on SuperH targets.
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