[U-Boot] [PATCH, RFC] Make arm926ejs use -march=armv5t to avoid problems with EABI
Make arm926ejs use -march=armv5t to avoid problems with EABI
Using -march=armv5t instead of armv5te allows Marvell Kirkwood-based boards to boot with the EABI changes introduced in commit f772acf8a584067033eff1e231fcd1fb3a00d3d9
Signed-off-by: Simon Kagstrom simon.kagstrom@netinsight.net ---
This allows me to build with -mabi=aapcs-linux again. I still haven't found out what exactly causes the issues I had reported here
http://www.mail-archive.com/u-boot@lists.denx.de/msg20517.html
but with this patch it works fine again. Disassembling the binary, I see that ldrd/strd instructions are gone (as expected), although I don't know if that is the issue.
cpu/arm926ejs/config.mk | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/cpu/arm926ejs/config.mk b/cpu/arm926ejs/config.mk index 90eb3c0..94f1c17 100644 --- a/cpu/arm926ejs/config.mk +++ b/cpu/arm926ejs/config.mk @@ -24,7 +24,7 @@ PLATFORM_RELFLAGS += -fno-strict-aliasing -fno-common -ffixed-r8 \ -msoft-float
-PLATFORM_CPPFLAGS += -march=armv5te +PLATFORM_CPPFLAGS += -march=armv5t # ========================================================================= # # Supply options according to compiler version
On 11:27 Fri 04 Sep , Simon Kagstrom wrote:
Make arm926ejs use -march=armv5t to avoid problems with EABI
Using -march=armv5t instead of armv5te allows Marvell Kirkwood-based boards to boot with the EABI changes introduced in commit f772acf8a584067033eff1e231fcd1fb3a00d3d9
Signed-off-by: Simon Kagstrom simon.kagstrom@netinsight.net
This allows me to build with -mabi=aapcs-linux again. I still haven't found out what exactly causes the issues I had reported here
http://www.mail-archive.com/u-boot@lists.denx.de/msg20517.html
but with this patch it works fine again. Disassembling the binary, I see that ldrd/strd instructions are gone (as expected), although I don't know if that is the issue.
it's wired because ldrd and strd are for 64bit data access and will be faster than ldm/stm and the "e" is explecitly specity to active the dsp assembly to improve the data transfert speed
Best Regards, J.
On Fri, 4 Sep 2009 11:27:19 +0200 Simon Kagstrom simon.kagstrom@netinsight.net wrote:
Make arm926ejs use -march=armv5t to avoid problems with EABI
Using -march=armv5t instead of armv5te allows Marvell Kirkwood-based boards to boot with the EABI changes introduced in commit f772acf8a584067033eff1e231fcd1fb3a00d3d9
Well, further testing (with ubifs) has shown that this doesn't actually solve the problem - only making it disappear for some cases.
So don't apply this patch for now.
// Simon
diff --git a/cpu/arm926ejs/config.mk b/cpu/arm926ejs/config.mk index 90eb3c0..94f1c17 100644 --- a/cpu/arm926ejs/config.mk +++ b/cpu/arm926ejs/config.mk @@ -24,7 +24,7 @@ PLATFORM_RELFLAGS += -fno-strict-aliasing -fno-common -ffixed-r8 \ -msoft-float
-PLATFORM_CPPFLAGS += -march=armv5te +PLATFORM_CPPFLAGS += -march=armv5t
Simon,
On Monday 14 September 2009 11:02:15 Simon Kagstrom wrote:
Make arm926ejs use -march=armv5t to avoid problems with EABI
Using -march=armv5t instead of armv5te allows Marvell Kirkwood-based boards to boot with the EABI changes introduced in commit f772acf8a584067033eff1e231fcd1fb3a00d3d9
Well, further testing (with ubifs) has shown that this doesn't actually solve the problem - only making it disappear for some cases.
Did you make any progress with this problem? And further insights here?
Thanks.
Cheers, Stefan
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On Thu, 24 Sep 2009 14:36:47 +0200 Stefan Roese sr@denx.de wrote:
On Monday 14 September 2009 11:02:15 Simon Kagstrom wrote:
Make arm926ejs use -march=armv5t to avoid problems with EABI
Using -march=armv5t instead of armv5te allows Marvell Kirkwood-based boards to boot with the EABI changes introduced in commit f772acf8a584067033eff1e231fcd1fb3a00d3d9
Well, further testing (with ubifs) has shown that this doesn't actually solve the problem - only making it disappear for some cases.
Did you make any progress with this problem? And further insights here?
Not really. I currently "solve" the problem by using the patch below, i.e., simply switching to the ABI before the change for arm926ejs. With this, it works fine for me, but I understand that this maybe isn't a good fix to the problem.
// Simon
From 4782dad55e5bde5500918cc19bae31ee3a13f6e9 Mon Sep 17 00:00:00 2001 From: Simon Kagstrom simon.kagstrom@netinsight.net Date: Fri, 4 Sep 2009 11:15:20 +0200 Subject: [PATCH] Make arm926ejs use -mabi=apcs-gnu to avoid EABI problems
Using -mabi=apcs-gnu allows Marvell Kirkwood-based boards to boot with the EABI changes introduced in commit f772acf8a584067033eff1e231fcd1fb3a00d3d9
Signed-off-by: Simon Kagstrom simon.kagstrom@netinsight.net --- cpu/arm926ejs/config.mk | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/cpu/arm926ejs/config.mk b/cpu/arm926ejs/config.mk index f8ef90f..466ccff 100644 --- a/cpu/arm926ejs/config.mk +++ b/cpu/arm926ejs/config.mk @@ -23,7 +23,7 @@
PLATFORM_RELFLAGS += -fno-common -ffixed-r8 -msoft-float
-PLATFORM_CPPFLAGS += -march=armv5te +PLATFORM_CPPFLAGS += -march=armv5te -mabi=apcs-gnu # ========================================================================= # # Supply options according to compiler version
participants (3)
-
Jean-Christophe PLAGNIOL-VILLARD -
Simon Kagstrom -
Stefan Roese