A 64-bit binary returning a value to a 32-bit binary?
I have a program that needs to be compiled as 64bit. I have another
program that needs to be compiled as 32bit and will call that 64-bit
binary. Is there a way for the 64-bit binary to return a string to
the 32-bit? If so, how?
The only way I could think of is to have the 32-bit binary call the 64-
bit binary, then it writes to a text file and finally have the 32-bit
binary read it off.
Is there a better way to do this?
> I have a program that needs to be compiled as 64bit. I have another
> program that needs to be compiled as 32bit and will call t...Are 64-bit Binaries Really Slower than 32-bit Binaries?
"Jean Marc BRUN" <jean-marc.brun _arobace/at_ tgcp.fr> wrote:
I just posted that a couple of days ago!
Really, I'm not out to destroy Microsoft. That will just be a completely
unintentional side effect.
"Nick E." <email@example.com> a �crit dans le message de news: JYcRb.4749
> I just posted that a couple of days ago!
OOOPSS... Let's say it's for ...64 bit binary launching 32 bit binaries and LD_PRELOAD'ed shared lib
Platform information: Solaris 10 running on AMD64.
I have a 32-bit pre-loaded shared library 'mysharedlib.so' running
with a 64-bit binary 'bin_exec_64'.
LD_PRELOAD=mysharedlib.so bin_exec_64 ...
I am getting the following error:
wrong ELF class: ELFCLASS64
I read about this problem on the web and found out about the
specialized LD_PRELOAD_32/LD_FLAGS_32 (for pre-loading 32bit shared
libs) and LD_PRELOAD_64/LD_FLAGS_64 (for pre-loading 64bit shared
However, if I set LD_PRELOAD_32=mysharedlib.so and execute 64-bit
'bin_exec_64', none of the functions in...different binary output with 32- and 64-bit hosted compilers
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32-bit (i686-linux fedora-9) and 64-bit (x86_64-linux fedora-20) hosted
djgpp-targeting compiler generates different output for some sources.
This happens with djgpp source itself too, and it isn't a nice thing
and was not an expected thing for me. Did the following with gcc-3.4.6:
Compiled djgpp-cvs with a 32- and 64-bit hosted toolchain (gcc-3.4.6
and binutils-2.25.1), then did:
diff -urp --exclude=*.d --exclude=id_*.o --exclude=stub* \
--exclude=*.tex --exclude=*.exe --exclude=djasm.c \
32/src 64/s...32-bit Number * 32-bit Number = 64-bit result
I need to do multiplication that mirrors how C handles integer
multiplication. That is, one 32-bit number times another 32-bit number
equals the least significant 32-bits of the 64-bit result.
In theory, I could mimic that behavior like so:
(x * x) & 0xFFFFFFFF
But this doesn't work quite right because the initial multiplication
Any thoughts? Ideas?
"Jeff.M" <Mott.Jeff@gmail.com> writes:
> I need to do multiplication that mirrors how C handles integer
> multiplication. That is, one 32-bit...compiling on 32-bit vs. 64-bit (gcc fails on 64-bit)
On a 64-bit Scientific Linux 5.4 machine, I get the following
when I try to compile the basic "Hello world" program:
[root]# g++ -Wall hello.cc -o hello
/tmp/ccglIDXK.s: Assembler messages:
/tmp/ccglIDXK.s:10: Error: suffix or operands invalid for `push'
/tmp/ccglIDXK.s:38: Error: suffix or operands invalid for `push'
/tmp/ccglIDXK.s:55: Error: suffix or operands invalid for `push'
/tmp/ccglIDXK.s:79: Error: suffix or operands invalid for `push'
/tmp/ccglIDXK.s:81: Error: suffix or operands invalid for `push'
/tmp/ccglIDXK.s:85: Error: suffix or operand...Matlab 64 vs 32 bit benchmarking results (on Win XP 64 bit vs Win XP 32 bit SP2)
Recently I installed a new PC with dual boot, win XP 32 bit and win XP
64 bit. On the 32 bit OS I run 32 bit matlab, on the 64 bit OS I run
64 bit matlab.
MATLAB Version 184.108.40.2067 (R2006b)
Intel core 2 duo 6700 @ 2.66GHz, 2GB RAM
NVIDIA GeForce 7600 GS
I benchmarked the systems in 2 ways (average over multiple runs):
1) with a benchmark from the file exchange
MATLAB Central > File Exchange > Utilities > Miscellaneous >
2) With my own benchmark (training of neural netwo...Windows 7 64 bit
My server works under Windows 7 Professional 64 bits, my FileMaker
Pro10 Advanced is 32 bits.
FM has to connect to a MySQL-database, which driver should I use?
The 64bits or the 32bits version?
And if 64, can FM communicate via the 64bits driver with MySQL?
Or should I better downgrade W7 to 32bits?
Harry <firstname.lastname@example.org> wrote:
> My server works under Windows 7 Professional 64 bits, my FileMaker
> Pro10 Advanced is 32 bits.
> FM has to connect to a MySQL-database, which driver should I use?
> The 64bits or the 32bits version?
I never used Filemaker. And I try to sta...code to determine 64-bit vs 32-bit binaries?
Can anyone post sample code showing how to determine, within a Solaris
process space, whether a program it's about to exec is a 64-bit or
32-bit executable? No use saying "man file"; I have to do it within the
current process. And of course the next obvious response is "take a look
at GNU or BSD file commands and see what they do". Unfortunately I've
tried that and it's not working right. So if any of you have ever had to
do this and have a few lines of C code to post, I'd appreciate it.
Mohun Biswas wrote:
> Can anyone ...32 bit Matlab install on 64 bit linux -- missing 32 bit libXp.so.6 library?
I'm trying to install 32 bit Matlab on 64 bit linux
I have seen the Technical Solution
and some notes for fixing this problem on Fedora
However, I'm running Ubuntu 2.6.12-9-amd64-generic, and neither of
these takes me all the way to a solution.
I'm at the point where I can run the installer with the following:
/usr/local/install/install_unix.sh -glnx86 -t -nocp
/usr/local/install/unix/install...reading binary data from a 32 bit machine on 64 bit machine
Hi I am very confused with the use of the struct module to read binary
data from a file.
( I have only worked with ascii files so far)
I have a file spec for a Data-logger (http://www.dataq.com/support/
I am collecting some voltage , time traces on one channel and they are
written to the binary file on a 32 bit windows machine
The file spec says that the number of header bytes in the data file
header is stored as a 16 bit eye "I" at bits 6-7
Now I want to get at that number. When I try format !h I get a
If f is my file handle opened with "...Reading binary file generated from 32-bit machine using 64-bit machine
I am sorry if i come up with elementary question but i spend two days
trying to figure out how to read a binary file generated by gfortran
on a 32 bit i386 machine using a 64 bit x86_64 machine. i tried to use
the flag -frecord-marker=4 to change the default from 8 to 4 bytes on
64 bits machine. However, this still doesn't seem to work. I just
can't read the binary file despite so many different trial. Can you
please help me what to do?
On 2007-11-25, email@example.com <firstname.lastname@example.org> wrote:
> I am sorry if i come up with elementa...Advanced Compiler Request: 8 bit, 16 bit, 32 bit, 64 bit code path/instruction generation and selection !
It would be very handy if Delphi could somehow generate code paths for 8
bit, 16 bit, 32 bit and 64 bit integers and possible even structures etc.
So maybe with some compiler magic multiple instruction code paths can be
generated AND SELECTED based on a "code path selection" variable.
Here some ideas:
Delphi could introduce a new "code path selection type"
TcodePathSelection = ( cps_8_bit, cps_16_bit, cps_32_bit, cps_64_bit );
// the Delphi programmers can then use:
vCodePathSelection : TcodePathSelection;
// Then somehow the Delphi program...32 bit or 64 bit Oracle on 64 bit OS?
Currently our environment is on 10g Release 2, OS windows 2000/2003
standard edition 32 bit. We use shared server to take advantage of
scalability and connecting maximum no of simultaneous connections to
the database. Now we take advantage of memory beyond 4GB we are
planning to check following.
64 bit Windows 2003 standard edition on AMD64/EM64T Servers.
Do we need to install 64 bit Oracle as well?
Do we need to reinstall Oracle clients with 64 bit installable if
Oracle Server is upgraded to 64 bit?
Is 32 bit Oracle is certified on 64 bit OS?
Do we need to take care of any other ...64-bit / 32-bit compilation
Many a times, while trying to compile software from source, I face the
situation where the 32-bit based code tries to access a 64-bit library
of 64-bit executable. In such a situation, I get an "Wrong ELF class"
error. Is there anyway I can compile that 64-bit library or executable
so that my 32-bit code can also use it. Is this what is known as cross-
My environment is:
Solaris 10 5/08 s10x_u5wos_10 X86.
CC: Sun C++ 5.8 Patch 121018-15 2008/05/14
GNU Make 3.81
ld: Software Generation Utilities - Solaris Link Editors: 5.10-1.489
Thanks & Regards,
dot...What is the difference between 32 and 64 bit Python on Windows 7 64 bit?
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I want to install Python on a PC with 16GB of RAM and the 64 bit version of
I want Python to be able to use as much as possible of the RAM.
When I install the 64 bit version of Python I find that sys.maxint ==
2**31 - 1
Whereas the Pythpon installed on my 64 bit linux system returns sys.maxint
== 2**63 - 1.
It looks to me as though 32 and 64 bit versions of Python on 64 bit Windows
are both really 32 bit Python, differing only in how they interact with
Windows. So I wouldn't expect ...Progress with 32-bit compiles with 64-bit compiler and related GLADE issues
Progress so far...
I have been using the x86_64 GNAT, version 4.1.0 to compile
32-bit and 64-bit code. (I'm on Fedora Core 5 at the moment!)
The "-m32" option didn't work for GNAT without a bit of
messing around. First I had to install a 32-bit libgnat.a, but
that didn't work until I put in a link from libgnat-4.1.a
into /usr/lib (it should get it from a separate
x86_64-redhat-linux/4.1.0/32 directory, but doesn't.
Running "gnatmake -m32 ..." now builds working 32-bit executables,
but I am left with the warning:
/usr/bin/ld: skipping incompati...How to tell if a program compiled as 32-bit or 64-bit? (Windows Vista 64)
I think I have finally gotten my Visual C++ Express 2008 to
use the 64-bit compiler in the Windows 7 SDK. I THINK! But I want to
make sure. I've compiled some programs with the 'target platform' set
to x64 in VC Express, but how do I tell if they really compiled into
"Bad Roy" <AlaBadRoy@yahoo.com> wrote in message
> I think I have finally gotten my Visual C++ Express 2008 to
> use the 64-bit compiler in the Windows 7 SDK. I THINK! But I want to
> make sure. I've co...shared library in 32 bit and 64 bit
I was loading something on 32 bit and 64 bit platform.
There are some shared libraries loaded for 32 bit are different from
those loaded on 64 bit platform.
My question is are shared libraries platform dependent.
And why there is mismatch in the .so being loaded for 32 bit and 64 bit
> I was loading something on 32 bit and 64 bit platform.
> There are some shared libraries loaded for 32 bit are different from
> those loaded on 64 bit platform.
> My question is are shared libraries platform dependent.
> And why there is mismatch ...Compile to 64-bit on 32-bit OS
Apparently my Mac Mini will run 64-bit code transparently even thought I'm
on a 32-bit OS. What I want to know is, how can I compile my code to
Dr Jon D Harrop, Flying Frog Consultancy Ltd.
In article <email@example.com>,
Jon Harrop <firstname.lastname@example.org> wrote:
> Apparently my Mac Mini will run 64-bit code transparently even thought I'm
> on a 32-bit OS. What I want to know is, how can I compile my code to
You get Intel's Just released C++ Compiler Update with the newer 64bi...Compiling 32 bit on a 64 bit system
a small local team of our engineers developts their own applications.
They need to compile applications in 32 bit,using their own 32 bit libs, on
this new system they have... which is 64 bit.
Is there any help available on using a 64 bit gcc to compile in 32 bit?
Any time things appear to be going better, you have overlooked
Rikishi42 <email@example.com> writes:
> a small local team of our engineers developts their own applications.
> They need to compile applications in 32 bit,using their own 32 bit libs, on
...32 bits *.dll for 64 bits compiling
I use 64 bits AIX 5.3 and all programs compiled on it are compiled as
64 bits mode using xlC and I've got a *.dll library which is 32 bits
mode. Is it possible to use this dll library compiling it in 64 bit
mode? In other way I want to use this library adding it to code, which
is compiled in 64 bits mode (xlC -q64 ...).
Have any idea how to do this or maybe it is no possible?
> I use 64 bits AIX 5.3 and all programs compiled on it are compiled as
> 64 bits mode using xlC and I've got a *.dll library which is 32 bits
> mode. Is it possible t...installing both 32-bit and 64-bit libraries
I have RedHat EL smp x86_64 system, and now I want to additionally
install the 32-bit version of the xorg-x11-libs for some programs
that are expecting the file /usr/X11R6/lib/libXpm.so.4 to exist.
(I have the 64-bit version in the lib64 subdirectory and I don't
think there will be any conflict problem.)
Is there an up2date incantation that will get me the 32-bit libraries?
I think the answer is: up2date <whatever> --arch=i386
...32 bit dll to 64 bit compilation?
I have a simple com dll build with Visual Studio 6. Now I want it to be
compatible on 64 bit OS also. for that what i need to do? On net i
found that i need to recompile with 64 bit compiler..but i am sorry for
my ignorance...i do not know what does it mean by 64 bit compiler?
If i directly build in VS .net then will it work? or do i need to
change some compiler settings?
Thanks in advance for your help.
> I have a simple com dll build with Visual Studio 6. Now I want it to be
> compatible on 64 bit OS also. for that w...