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__uClibc_main changes
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always exist
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Jacobowitz so that libm.so links properly with newer toolchains
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'include/atomic.h' to add in new atomic operations for use by NPTL. There are multiple files for PowerPC and Sparc for 'atomic.h'. I will let those architecture maintainers choose the correct file. The files come from glibc in 'sysdeps/ARCH/bits'.
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The old sh system call interface used 0x00 - 0x0f for the trapa value
(number of arguments), whereas the new ABI uses the 0x10 - 0x1f range.
For some reason we were using an off-by-1 trapa immediate which ended up
trashing r1 in the _syscall6() case, so we fix it up..
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This popped up during a build with gcc4:
/home/pmundt/devel/svn/buildroot/build_sh2a_nofpueb/staging_dir/bin/sh2a_nofpueb-linux-uclibc-gcc -Wall -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fstrict-aliasing -mprefergot -Os -funit-at-a-time -mb -m2a-nofpu -fno-builtin -nostdinc -D_LIBC -I../../../../include -I. -isystem /home/pmundt/devel/svn/buildroot/build_sh2a_nofpueb/staging_dir/lib/gcc/sh2a_nofpueb-linux-uclibc/4.0.0/include -DNDEBUG -I../ -c longjmp.c -o longjmp.o
/tmp/ccWyQbux.s: Assembler messages:
/tmp/ccWyQbux.s:45: Error: Local symbol `__sigprocmask' can't be equated to undefined symbol `sigprocmask'
make[5]: *** [longjmp.o] Error 1
make[5]: Leaving directory `/home/pmundt/devel/svn/buildroot/toolchain_build_sh2a_nofpueb/uClibc/libc/sysdeps/linux/sh'
Stupid gcc.
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as the flags for all calls to 'as'
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Below is a patch to make the pread and pwrite calls work on the SH
architecture. I've only tested this on the SH4 with a 2.4.24 kernel - a
fairly recent kernel is required as the problem is partially fixed in
the kernel itself. For more information (in relation to glibc, but the
problem is the same) see the thread at
http://sourceforge.net/mailarchive/message.php?msg_id=2375908
Someone should really test this on the SH2/3...
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size and performance penalty to profiling applications this way, as well as
Heisenberg effects, where the act of measuring changes what is measured.
There are better tools for doing profiling, such as OProfile, that do not
require gcc to instrument the application code.
-Erik
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Some utilities, such as valgrind, have a legitimate reason to know the address
of the current brk. Since we know such utils will peek under our skirt, we
might as well give them what they expect and not use a gratuitously different
symbol name.
-Erik
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have it. It is used by the boehm gc, amoung other things.
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'__kernel_old_dev_t'. And of course there is no good way to know
which is in use except checking linux/version.h. Grumble.
This is rather lame, but for now, define __kernel_old_dev_t to be
the same as __kernel_dev_t. This will want to be revisited soon.
-Erik
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-Erik
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being cleaned up.
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Untested, but syscall() is needed by busybox for pivot_root at least.
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used to generate the crti.S and crtn.S files. Since we don't use that
anymore, keeping the workaround makes no sense.
Furthermore, in most cases, SAFECFLAGS was not picking up all the
needed flags, causing crti.o and crtn.o to not be built PIC.
Which is very bad. Removing SAFECFLAGS and using CFLAGS fixes
that as well.
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Hello Erik,
to compile the new uClibc release for a SH3 we need some little
modifications:
First I fix the crt[in].S files, so we can use them for big endian and
little endian targets.
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broke a couple of days ago. :-(
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ln.patch:
* Define $(LN) as ln in Rules.mak.
* Change all occurrences of ln into $(LN).
* Change all constructs like (cd path && ln -sf foo/file file)
into $(LN) -sf foo/file path/file. The latter construct is
already used in a number of places so it should not be
an additional compatibility problem.
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rm.patch:
* Define $(RM) as rm -f in Rules.mak and test/Rules.mak
(this is the same definition as gmake uses by default).
* Change all occurrences of rm and rm -f into $(RM).
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Current uClibc contains only one fpu_control.h and it is i386 version.
This is a patch to use platform specific fpu_control.h. All new files
come from glibc 2.3.2. This patch is against 0.9.21 but also can be
applied to CVS as is.
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on i386, at least, so seems like a good thing.
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using r12. r12 is supposed to be preserved across C function calls. r0-r7
are trashable :-)
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fix a couple of gcc 3.3 compiler warnings in gmon.c
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for gmon profiling support for the SuperH target.
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end of the buffer.
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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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generate a crt0 and crt1 file. Most arches still need
to be updated to call __uClibc_start_main() rather than
__uClibc_main().
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build a crt0.o and a crt1.o. crt1.o will support ctors and dtors if
such support is enabled. One more gratuitous toolchain support issue
is thereby removed...
-Erik
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configurable, so people who do not need or want ctor/dtor support
can disable it and make their binaries a little bit smaller.
-Erik
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I attached a patch, which revise the clone.S and vfork.S:
- Use PIC code.
- include new file syscall.S, so we can simply make a branch to
__syscall_error instead of a PLT/GOT call
- call errno_location to store the syscall error (for pthreads)
- avoid to use the 'shad' statement on SH2 targets
- call fork if vfork isn't available
- some cleanups and optimization
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Hi Erik,
I added the FPU support for the setjmp/longjmp stuff.
This patch also moves the code from the bsd*.S files to the setjmp.S file, so
we can use simple branch instructions instead of referencing over the
.GOT/.PLT section. This makes the PIC code much easier, smaller and faster.
(The idea comes from the SPARC target)
Bye Stefan
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-Erik
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-Erik
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