Re: [B2-devel] x86_64 Mach-O dyngen patch

[Jean-Pierre <cho...@fr...>]

Hi,

Le 25 oct. 2009 à 23:37, Jean-Pierre a écrit :

> Here's a dyngen patch for Snow Leopard x86_64 compatibility. This  
> work is mostly based on the unofficial and incomplete x86_64 mach-o  
> patch of qemu.
> The JIT compiler seems to be ok in 64 bit mode, since I have the  
> 'happy mac' at boot time, but the application crashes later...

When cleaning the dyngen code, I broke the x86_64 ELF part, It won't  
compile because of the lines 2283-2285:

                     if (rel->r_offset >= start_offset &&
                         int slide;
                         rel->r_offset < start_offset + copy_size) {

that should be:

                     if (rel->r_offset >= start_offset &&
                         rel->r_offset < start_offset + copy_size) {
                         int slide;

Sorry about this.

The JIT compiler still crashes when using the code generated by  
Apple's gcc on ppc-dyngen-ops.cpp.
I'm not sure why the resulting assembly code is so different from a  
Linux 64-bit gcc install. I used otool on Mac and dumpobj on Linux to  
compare these, and many functions are using different opcodes.
if I replace the ppc-dyngen-ops.hpp file by one built on a Linux 64- 
bit machine, then SheepShaver runs fine in 64-bit mode with the JIT  
compiler on Snow Leopard.

Best regards,

  - Jean-Pierre.