binutils 2.15.91 and 2.16.91: ctors from crtend.o not load on linux cross gcc (__cxa_throw)

[Henry Nestler]

* Bug: Cross compile from linux for mingw32 don't init the ctors from 
crtend.o!  Every 'throw' in a program crashes with a "NULL-Pointer read" 
in function __cxa_throw.

* Analysed why it crashed:
 >>> Source line: 
gcc-3.3.1-20030804-1/libstdc++-v3/libsupc++/eh_throw.cc:64 >>>
   header->unexpectedHandler = __unexpected_handler;
<<< snip <<<

"__unexpected_handler" is a macro to variable 
"__w32_sharedptr_unexpected", and there was not init.  Internal function 
"_w32_sharedptr_initialize" was not called before main starts.

This is the standard function tree, started from a section .ctors in 
crtend.o:
   __reg_frame_ctor
     __do_frame_init
       __w32_sharedptr_initialize
       __register_frame_info
			
Problem is, that "*crtend.o (.ctors)" in linker script does not include 
the function pointer to "__reg_frame_ctor".  With other words: The 
default linker script from mingw32 not loads contructors from crtend.o.

* Sample source:
 >>> cat sample.cc >>>
int main(void)
{
	try {
		throw "End!";
	} catch (...) {
		return 1;
	}
	return 0;
}
<<< end cat <<<

* Build it with linker map
   i686-pc-mingw32-g++ -Wl,-M -Wl,--verbose -o sample.exe sample.cc

See the emtpy section .ctors for crtend.o:
 >>> old bad map file >>>
                 0x00406c80                __CTOR_LIST__ = .
                 0x00406c80        0x4 LONG 0xffffffff
  *(EXCLUDE_FILE(*crtend.o) .ctors)
  *(.ctor)
  *(SORT(.ctors.*))
  *crtend.o(.ctors)
                 0x00406c84        0x4 LONG 0x0
                 0x00406c88                ___DTOR_LIST__ = .
<<< snip map <<<


* With my patch shows good, for sample:
 >>> new good map file >>>
                 0x00406c80                __CTOR_LIST__ = .
                 0x00406c80        0x4 LONG 0xffffffff
  *(EXCLUDE_FILE(*crtend.o) .ctors)
  *(.ctor)
  *(SORT(.ctors.*))
  *(.ctors)
  .ctors         0x00406c84        0x4 
/home/hn/CoLinux/mingw32/lib/gcc-lib/i686-pc-mingw32/3.3.1/crtend.o
                 0x00406c88        0x4 LONG 0x0
                 0x00406c8c                ___DTOR_LIST__ = .
<<< snip map <<<


* Versions:
Build system: i686-pc-linux
Build cross tool chain with:
  gcc-Version 3.3.1 (SuSE Linux)
  GNU ld version 2.14.90.0.5 20030722 (SuSE Linux)

Used parameters for build Binutils:
   ./configure --prefix=/home/user/mingw32 --target=i686-pc-mingw32
   make
   make install

Used parameters for build Compiler:
   ./configure -v --prefix=/home/user/mingw32 \
	--target=i686-pc-mingw32 \
	--with-headers=/home/user/mingw32/i686-pc-mingw32/include \
	--with-gnu-as \
	--with-gnu-ld \
	--without-newlib \
	--disable-multilib
   make LANGUAGES="c c++"
   make LANGUAGES="c c++" install


Target system: i686-pc-mingw32

# i686-pc-mingw32-gcc -v
Reading specs from ./../lib/gcc-lib/i686-pc-mingw32/3.3.1/specs
Configured with: 
/home/hn/CoLinux/build/co-devel-tmp/gcc-3.3.1-20030804-1/configure -v 
--prefix=/home/hn/CoLinux/mingw32 --target=i686-pc-mingw32 
--with-headers=/home/hn/CoLinux/mingw32/i686-pc-mingw32/include 
--with-gnu-as --with-gnu-ld --without-newlib --disable-multilib
Thread model: single
gcc version 3.3.1 (mingw special 20030804-1)

# i686-pc-mingw32-ld -v
GNU ld version 2.15.91 20040904

# Mingw from source
binutils-2.15.91-20040904-1-src.tar.gz

Same problem if using this versions:
  binutils-2.16.91-20050827-1-src.tar.gz
  gcc-g++-3.4.4-20050522-1-src.tar.gz

https://sourceforge.net/tracker/index.php?func=detail&aid=1394022&group_id=2435&atid=102435
Have not seen any replay from bug-tracing, so I repeat this as mail now.

My project details can read here:
http://www.henrynestler.com/colinux/patches/devel/throw-readme.txt

-- 
Henry Nestler
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