* PowerPC Stack Frames
@ 1999-12-06 9:05 Dick Ginther
1999-12-06 13:06 ` Andrew Klossner
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Dick Ginther @ 1999-12-06 9:05 UTC (permalink / raw)
To: help-gcc
Hi,
I am using egcs-2.91.66 for a PowerPC. I would like
some help understanding how registers and the stack are used
on PowerPC with GCC. I know that R1 is the stack pointer, but
are there other registers reserved for other purposes?
On an interrupt do I have to save all 32 registers or
are there a sub-set that are usually used.
Thanks in advance.
--
Dick Ginther E-mail: dick.ginther@develcon.com
Develcon Electronics Ltd. Web: http://www.develcon.com
856 - 51st Street East Phone: 306 931-1339
Saskatoon, SK Canada S7K 5C7 Fax: 306 931-1352
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: PowerPC Stack Frames
1999-12-06 9:05 PowerPC Stack Frames Dick Ginther
@ 1999-12-06 13:06 ` Andrew Klossner
1999-12-31 22:24 ` Andrew Klossner
1999-12-09 11:44 ` Frank Herold
1999-12-31 22:24 ` Dick Ginther
2 siblings, 1 reply; 6+ messages in thread
From: Andrew Klossner @ 1999-12-06 13:06 UTC (permalink / raw)
To: help-gcc
> I am using egcs-2.91.66 for a PowerPC. I would like
> some help understanding how registers and the stack are used
> on PowerPC with GCC.
It depends on which ABI you're using. If it's the EABI (Embedded):
You have to save GPR registers 0 and 3-12, LR, CTR, XER, and CR. If
the C routines you'll call use floating point, you must also save FP
registers 0-13 and FPSCR. The C routines will save/restore anything
else they use.
-=- Andrew Klossner (andrew@teleport.com)
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: PowerPC Stack Frames
1999-12-06 13:06 ` Andrew Klossner
@ 1999-12-31 22:24 ` Andrew Klossner
0 siblings, 0 replies; 6+ messages in thread
From: Andrew Klossner @ 1999-12-31 22:24 UTC (permalink / raw)
To: help-gcc
> I am using egcs-2.91.66 for a PowerPC. I would like
> some help understanding how registers and the stack are used
> on PowerPC with GCC.
It depends on which ABI you're using. If it's the EABI (Embedded):
You have to save GPR registers 0 and 3-12, LR, CTR, XER, and CR. If
the C routines you'll call use floating point, you must also save FP
registers 0-13 and FPSCR. The C routines will save/restore anything
else they use.
-=- Andrew Klossner (andrew@teleport.com)
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: PowerPC Stack Frames
1999-12-06 9:05 PowerPC Stack Frames Dick Ginther
1999-12-06 13:06 ` Andrew Klossner
@ 1999-12-09 11:44 ` Frank Herold
1999-12-31 22:24 ` Frank Herold
1999-12-31 22:24 ` Dick Ginther
2 siblings, 1 reply; 6+ messages in thread
From: Frank Herold @ 1999-12-09 11:44 UTC (permalink / raw)
To: help-gcc
Try this side:
http://www.esofta.com/softspecs.html
The PowerPc stack framing is explained in document (2) in detail.
Frank Herold E-mail fh@cellware.de
Dick Ginther schrieb in Nachricht < 82gpv3$bjn@sirius.develcon.com >...
>Hi,
> I am using egcs-2.91.66 for a PowerPC. I would like
>some help understanding how registers and the stack are used
>on PowerPC with GCC. I know that R1 is the stack pointer, but
>are there other registers reserved for other purposes?
> On an interrupt do I have to save all 32 registers or
>are there a sub-set that are usually used.
> Thanks in advance.
>--
>Dick Ginther E-mail: dick.ginther@develcon.com
>Develcon Electronics Ltd. Web: http://www.develcon.com
>856 - 51st Street East Phone: 306 931-1339
>Saskatoon, SK Canada S7K 5C7 Fax: 306 931-1352
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: PowerPC Stack Frames
1999-12-09 11:44 ` Frank Herold
@ 1999-12-31 22:24 ` Frank Herold
0 siblings, 0 replies; 6+ messages in thread
From: Frank Herold @ 1999-12-31 22:24 UTC (permalink / raw)
To: help-gcc
Try this side:
http://www.esofta.com/softspecs.html
The PowerPc stack framing is explained in document (2) in detail.
Frank Herold E-mail fh@cellware.de
Dick Ginther schrieb in Nachricht < 82gpv3$bjn@sirius.develcon.com >...
>Hi,
> I am using egcs-2.91.66 for a PowerPC. I would like
>some help understanding how registers and the stack are used
>on PowerPC with GCC. I know that R1 is the stack pointer, but
>are there other registers reserved for other purposes?
> On an interrupt do I have to save all 32 registers or
>are there a sub-set that are usually used.
> Thanks in advance.
>--
>Dick Ginther E-mail: dick.ginther@develcon.com
>Develcon Electronics Ltd. Web: http://www.develcon.com
>856 - 51st Street East Phone: 306 931-1339
>Saskatoon, SK Canada S7K 5C7 Fax: 306 931-1352
^ permalink raw reply [flat|nested] 6+ messages in thread
* PowerPC Stack Frames
1999-12-06 9:05 PowerPC Stack Frames Dick Ginther
1999-12-06 13:06 ` Andrew Klossner
1999-12-09 11:44 ` Frank Herold
@ 1999-12-31 22:24 ` Dick Ginther
2 siblings, 0 replies; 6+ messages in thread
From: Dick Ginther @ 1999-12-31 22:24 UTC (permalink / raw)
To: help-gcc
Hi,
I am using egcs-2.91.66 for a PowerPC. I would like
some help understanding how registers and the stack are used
on PowerPC with GCC. I know that R1 is the stack pointer, but
are there other registers reserved for other purposes?
On an interrupt do I have to save all 32 registers or
are there a sub-set that are usually used.
Thanks in advance.
--
Dick Ginther E-mail: dick.ginther@develcon.com
Develcon Electronics Ltd. Web: http://www.develcon.com
856 - 51st Street East Phone: 306 931-1339
Saskatoon, SK Canada S7K 5C7 Fax: 306 931-1352
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~1999-12-31 22:24 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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1999-12-06 9:05 PowerPC Stack Frames Dick Ginther
1999-12-06 13:06 ` Andrew Klossner
1999-12-31 22:24 ` Andrew Klossner
1999-12-09 11:44 ` Frank Herold
1999-12-31 22:24 ` Frank Herold
1999-12-31 22:24 ` Dick Ginther
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