[Qemu-devel] [RFC] TCG support for OSX/ppc

[Andreas Färber]

Hello,

Attached is a work-in-progress patch to restore support for running  
QEMU on Mac OS X PowerPC (32-bit). It adjusts the stack offsets  
according to the following ABI document:

http://developer.apple.com/documentation/DeveloperTools/Conceptual/LowLevelABI/Articles/32bitPowerPC.html

If these numbers were confirmed to be correct, we should introduce  
suitable #defines to avoid some of the #ifdefs currently in the patch.

With this patch applied, I get the following immediate error when  
running qemu-system-sparc:

qemu: fatal: Trap 0x07 while interrupts disabled, Error state
pc: 00004120  npc: 00004124
General Registers:
%g0: 00000000   %g1: 7120010c   %g2: 00000000   %g3: 71200100   
%g4: 00000000   %g5: 00000000   %g6: 00000000   %g7: 00000000   
Current Register Window:
%o0: 00000000   %o1: 00000000   %o2: 00000000   %o3: 00000000   
%o4: 00000000   %o5: 00000000   %o6: 00000000   %o7: 00000000   
%l0: 00000000   %l1: 00000000   %l2: 00000000   %l3: 00000000   
%l4: 00000000   %l5: 00000000   %l6: 00000000   %l7: 00000000   
%i0: 00000000   %i1: 00000000   %i2: 00000000   %i3: 00000000   
%i4: 00000000   %i5: 00000000   %i6: 00000000   %i7: 00000000   

Floating Point Registers:
%f00: 000000000.000000 000000000.000000 000000000.000000  
000000000.000000
%f04: 000000000.000000 000000000.000000 000000000.000000  
000000000.000000
%f08: 000000000.000000 000000000.000000 000000000.000000  
000000000.000000
%f12: 000000000.000000 000000000.000000 000000000.000000  
000000000.000000
%f16: 000000000.000000 000000000.000000 000000000.000000  
000000000.000000
%f20: 000000000.000000 000000000.000000 000000000.000000  
000000000.000000
%f24: 000000000.000000 000000000.000000 000000000.000000  
000000000.000000
%f28: 000000000.000000 000000000.000000 000000000.000000  
000000000.000000
psr: 0x044000c0 -> Z--- SP- wim: 0x00000001
fsr: 0x00080000
../qemu-debian-sparc.command: line 3:  1259 Abort trap              / 
Users/andreas/Q/latest/bin/qemu-system-sparc -hda /Users/andreas/ 
Documents/QEMU/DebianSparc.qvm/Harddisk_1.qcow2 -m 256


Probably I'm missing something obvious... Any hints or requests how to  
improve the patch appreciated.

Andreas