[Bug 32854] New: Winedbg on ARM: gdb proxy mode lacks support for reading CPSR

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=32854

             Bug #: 32854
           Summary: Winedbg on ARM: gdb proxy mode lacks support for
                    reading CPSR
           Product: Wine
           Version: 1.5.22
          Platform: arm
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: winedbg
        AssignedTo: wine-bugs at winehq.org
        ReportedBy: focht at gmx.net
    Classification: Unclassified


Hello folks,

as the summary says ...

Any command will show the problem:

--- snip ---
$ winedbg --gdb ./foo-arm.exe
...
Wine-gdb> bt
#0  0x4025202c in kill () from /lib/arm-linux-gnueabi/libc.so.6
Register 25 is not available
--- snip --- 

Making winedbg more verbose yields:

--- snip ---
...
Packet: g
Reply :
000000000500000000c00840103e00003c969f40300002408988000025000000000000000000000000000840fcfdcf408cc13e40f4fdcf4054a83a402c202540
Packet: p19
Register out of bounds 19
Reply : 
...
--- snip --- 

GDB reads standard registers using the "g" command ('get all registers').
Special purpose registers like CPSR are read using "p" command ('get individual
register').
This is currently not supported by winedbg but essential when running proxy
mode.

Source:
http://source.winehq.org/git/wine.git/blob/d62d7474d43949d71ac34e2157c2fdb83341e330:/programs/winedbg/gdbproxy.c#l372

--- snip ---
 372 #elif defined(__arm__)
 373 static struct cpu_register cpu_register_map[] = {
 374     REG(R0, 4),
 375     REG(R1, 4),
 376     REG(R2, 4),
 377     REG(R3, 4),
 378     REG(R4, 4),
 379     REG(R5, 4),
 380     REG(R6, 4),
 381     REG(R7, 4),
 382     REG(R8, 4),
 383     REG(R9, 4),
 384     REG(R10, 4),
 385     REG(Fp, 4),
 386     REG(Ip, 4),
 387     REG(Sp, 4),
 388     REG(Lr, 4),
 389     REG(Pc, 4),
 390 };
--- snip ---

Side note: For future it might be useful to add support for XML register set
definitions (newer GDB versions are XML-aware = more flexible).

Regards

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