[parisc-linux] Xfree-server and Xhp ?

[parisc-linux] Xfree-server and Xhp ?

[Joel Soete]

Hi all,

I just discover some days ago (when trying to rebuild 4.3) that in XFree-4.2 still exists (not anymore
in 4.3?) the sources of a Xhp server supporting the builtin gfx of my testing b180 (into build-tree/xc/programs/Xserver/hw/hp/).

Juliusz Chroboczek <jch@pps.jussieu.fr <mailto:jch@pps.jussieu.fr>> kindly explain me:
> Please note that Xhp is not supported by XFree86, and most probably
> doesn't build.
> 
> Try adding a file xc/config/cf/host.def with the following line:
>
>  #define XhpServer YES
>
> Then make World as usual.

It doesn't build :-(

But I also found some additional patch which HP supplied for suport of X11R6.3 into mklinux project.
It would be helpful as this patch supplied (among other things) the asm src of an object supplying requested ngleDepth8_CopyAreaFromToScreen() and ngleDepth24_CopyAreaFromToScreen() functions.
Into mklinux sources I also find back <machine/asm.h> it would be easy with the help of kernel documentation to 'reverse' it for parisc linux (seems to be trivial).
My only pb is that src seems to be writen for 'som' env:
>#include <machine/asm.h>
>
>       .space  $TEXT$
>       .subspa $CODE$
>
>       .import ngleScreenPrivIndex,data
>
>       .export ngleDepth8_CopyAreaFromToScreen
>       .proc
>       .callinfo
>
>ngleDepth8_CopyAreaFromToScreen
>       ldo 0x40(sp),sp
>       stw arg0,-0x64(sp)
>       stw arg1,-0x68(sp)
>       stw arg2,-0x6c(sp)
>       stw arg3,-0x70(sp)
>       ldw -0x68(sp),r1
[...]
>       stw t3,0xb00(t4)
>       bv r0(rp)
>       ldo -0x40(sp),sp
>
>       .procend
>
[...]+
>       .end

(arg[0..3], r[0..], t[1..4] beeing labels defined <machine/asm.h>)

Does it exist some doc or tips to do this kind of obj translation 'som' -> 'elf'?

Thanks in advance for advises,
	Joel

[parisc-linux] Re: Xfree-server and Xhp ?

[Randolph Chung]

> Into mklinux sources I also find back <machine/asm.h> it would be easy with 
> the help of kernel documentation to 'reverse' it for parisc linux (seems to 
> be trivial).

> Does it exist some doc or tips to do this kind of obj translation 'som' -> 
> 'elf'?

well, not that i know of, but it should work almost as is. most of these
are actually differences between the HP assembler and the GNU assembler,
rather than differences between SOM and ELF.

> >      .space  $TEXT$
> >      .subspa $CODE$

change to ".text"

> >
> >      .import ngleScreenPrivIndex,data
> >
> >      .export ngleDepth8_CopyAreaFromToScreen
> >      .proc
> >      .callinfo
> >
> >ngleDepth8_CopyAreaFromToScreen
add colon (:) at end

> >      ldo 0x40(sp),sp
> >      stw arg0,-0x64(sp)
> >      stw arg1,-0x68(sp)
> >      stw arg2,-0x6c(sp)
> >      stw arg3,-0x70(sp)
> >      ldw -0x68(sp),r1
> [...]
> (arg[0..3], r[0..], t[1..4] beeing labels defined <machine/asm.h>)

shouldn't need the labels, the assembler recognizes these. but you need
to put % in front of all the register names in order for the GNU
assembler to accept the input. (ldo 0x40(%sp),%sp, etc)

HTH,
randolph
-- 
Randolph Chung
Debian GNU/Linux Developer, hppa/ia64 ports
http://www.tausq.org/

[parisc-linux] Re: Xfree-server and Xhp ?

[Joel Soete]

>well, not that i know of, but it should work almost as is. most of these
>are actually differences between the HP assembler and the GNU assembler,
>rather than differences between SOM and ELF.
>
>> >      .space  $TEXT$
>> >      .subsp
>> $CODE$
>
>change to ".text"
>
That was my main question, nice :)

>> >
>> >ngleDepth8_CopyAreaFromToScreen
>add colon (:) at end
Ok

> >      ldo 0x40(sp),sp
^^^^^^^^^^^^^^^^^^^^^^^^^^That was I suspected to be 'som' specific

> >      stw arg0,-0x64(sp)
> >      stw arg1,-0x68(sp)
> >      stw arg2,-0x6c(sp)
> >      stw arg3,-0x70(sp)
> >      ldw -0x68(sp),r1
> [...]
> (arg[0..3], r[0..], t[1..4] beeing labels defined <machine/asm.h>)

>shouldn't need the labels, the assembler recognizes these. but you need
>to put % in front of all the register names in order for the GNU
>assembler to accept the input. (ldo 0x40(%sp),%sp, etc)

HTH,

A lot you just answers to all my questions,

Thanks a lot,
    Joel



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[parisc-linux] Re: Xfree-server and Xhp ?

[Randolph Chung]

> > >      ldo 0x40(sp),sp
> ^^^^^^^^^^^^^^^^^^^^^^^^^^That was I suspected to be 'som' specific

that means a 64-byte stack.. should be fine on palinux as well.

randolph
-- 
Randolph Chung
Debian GNU/Linux Developer, hppa/ia64 ports
http://www.tausq.org/

[parisc-linux] Re: Xfree-server and Xhp ?

[Joel Soete]

>> > >      ldo 0x40(sp),sp
> ^^^^^^^^^^^^^^^^^^^^^^^^^^That was I suspected to be 'som' specific
>
>that means a 64-byte stack.. should be fine on palinux as well.

Ok I will so try like this (after % and other stuff translation) :-)

Thanks again,
    Joel

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[parisc-linux] Re: Xfree-server and Xhp ?

[Joel Soete]

Joel Soete wrote:

>>>>>     ldo 0x40(sp),sp
>>>>>          
>>>>>
>>^^^^^^^^^^^^^^^^^^^^^^^^^^That was I suspected to be 'som' specific
>>
>>that means a 64-byte stack.. should be fine on palinux as well.
>>    
>>
>
>Ok I will so try like this (after % and other stuff translation) :-)
>
>Thanks again,
>    Joel
>
Just a follow-up to mentioned that it works (*.s compiling). 
Unfortunately I don't think that I never reach to obtain a full Xhp 
server because I still need some functions (2 or 3) which I didn't found 
nowhere (in the src I got; even thought I found one in a hp lib); I am 
so oblige to abandon ( :_( ).

Thanks again for all,
    Joel