I'm sending a new version of the patch that uses Base Restored data
abort model.
Lauro
diff -ru qemu-0.9.0.orig/target-arm/translate.c qemu-0.9.0/target-arm/translate.c
--- qemu-0.9.0.orig/target-arm/translate.c 2007-03-16 11:41:28.0 -0300
+++ qemu-0.9.0/target-arm/translate.c 2007-03-16
Qemu-arm is wrongly executing post-indexed loads when Rm and Rd are
the same register. For example:
ldr r0, [r1], +r0
Current behavior:
r0 - [r1]
r1 - r1 + r0
Expected behavior:
addr - r1
r1 - r1 + r0
r0 - [addr]
The attached patch fixes this bug. Patched by me and Rodrigo Vivi.
This patch was
On Thursday 15 March 2007 19:35, Lauro Ramos Venancio wrote:
Qemu-arm is wrongly executing post-indexed loads when Rm and Rd are
the same register. For example:
ldr r0, [r1], +r0
Current behavior:
r0 - [r1]
r1 - r1 + r0
Expected behavior:
addr - r1
r1 - r1 + r0
r0 - [addr]
This is
Hi Paul,
On 3/15/07, Paul Brook [EMAIL PROTECTED] wrote:
On Thursday 15 March 2007 19:35, Lauro Ramos Venancio wrote:
Qemu-arm is wrongly executing post-indexed loads when Rm and Rd are
the same register. For example:
ldr r0, [r1], +r0
Current behavior:
r0 - [r1]
r1 - r1 + r0
Expected
This is still wrong.
So, is this a known bug?
Still wrong implies it's a bug, and your patch does not fix it properly.
The writeback must happen after the load.
We code like this because
- we didn't find this restriction in arm reference manual
It's the Abort model section you mention
On 3/15/07, Paul Brook [EMAIL PROTECTED] wrote:
This is still wrong.
So, is this a known bug?
Still wrong implies it's a bug, and your patch does not fix it properly.
I know that...
I was not clear.. sorry...
what I mean is: do you agree that there was a bug in these instructions?
Paul Brook a écrit :
I suggest you check again. I'm fairly sure the arm926 implements the Base
Restored abort model.
Yes, but arm7 is Based Updated IIRC. What particular implementation
does Qemu target?
There are so many IMPLEMENTATION DEFINED and UNPREDICTABLE in the
architecture (that
On Thursday 15 March 2007 21:55, Laurent Desnogues wrote:
Paul Brook a écrit :
I suggest you check again. I'm fairly sure the arm926 implements the Base
Restored abort model.
Yes, but arm7 is Based Updated IIRC. What particular implementation
does Qemu target?
Qemu currently emulates
