[Lazarus] Single-stepping assembler

[Mark Morgan Lloyd]

Mark Morgan Lloyd wrote:
> Martin wrote:
>> On 11/09/2011 18:23, Martin wrote:
>>> On 11/09/2011 16:44, Mark Morgan Lloyd wrote:
>>>>
>>>> Lazarus is still building for ARM, I'll report back when I know how 
>>>> that looks. I'll also check the exact kernel versions that the test 
>>>> systems have running, in case there's some problem.
>>>>
>>>
>>> I'll see if I find the time => it should be simple to copy the code 
>>> from unit GDBMIClasses) TPseoudoTerminal.Open /Read and make a small 
>>> test app, that will open a pseudo terminal, set the handle to 
>>> none-blocking read, and call read on it => and test if read will 
>>> block or not.
>>
>> Ok, the below code, imualtes the pseudoterminal handling => the read 
>> is supposed to bne none blocking.
>>
>> maybe some of the constants are indeed wrong for your system (endianess)?
> 
> Thanks, I'll work on that as soon as I have time. If it were a simple 
> endianness issue I'd expect PPC (PowerPC, in an old Mac)  to fail.

 >>   O_NONBLOCK = &04000;

For some reason that reminded me of a discussion of serial access on OSX 
in the fpc-pascal ML a few days ago. Nobody actually said in that thread 
that that varied by architecture, but a bit of Googling got me 
http://comments.gmane.org/gmane.linux.kernel/1093174 hence on one of my 
systems

$ find . -name fcntl.h -exec grep O_NONBLOCK \{\} \; -print

#define O_NONBLOCK      0x4000
./include/asm-sparc64/fcntl.h

etc. Also fpc/.../linux/ostypes.inc specifically has a different value 
for SPARC... GOK who's originally responsible for that inconsistency.

-- 
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

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