* [Buildroot] [PATCH] uboot: Use "mdbtrick" target when building elf for ARC
@ 2016-05-27 17:51 Zakharov Vlad
2016-06-07 9:26 ` Vlad Zakharov
2016-06-12 19:40 ` Thomas Petazzoni
0 siblings, 2 replies; 3+ messages in thread
From: Zakharov Vlad @ 2016-05-27 17:51 UTC (permalink / raw)
To: buildroot
By default position independent executables (PIE) are generated
when building U-Boot elf target. MetaWare debugger doesn't support
PIE (position-independent executable).
In order to allow MDB load and run U-Boot elf, we need to do a
special trick, called "mdbtrick".
This special build target is used to fake generated U-Boot elf by:
1. Reset PIE flag in ELF header
2. Strip all debug information from elf
Signed-off-by: Zakharov Vlad <vzakhar@synopsys.com>
---
boot/uboot/uboot.mk | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/boot/uboot/uboot.mk b/boot/uboot/uboot.mk
index e739638..d8cdf5c 100644
--- a/boot/uboot/uboot.mk
+++ b/boot/uboot/uboot.mk
@@ -38,6 +38,10 @@ endif
ifeq ($(BR2_TARGET_UBOOT_FORMAT_ELF),y)
UBOOT_BIN = u-boot
+# To make elf usable for debuging on ARC use special target
+ifeq ($(BR2_arc),y)
+UBOOT_MAKE_TARGET = mdbtrick
+endif
else ifeq ($(BR2_TARGET_UBOOT_FORMAT_KWB),y)
UBOOT_BIN = u-boot.kwb
UBOOT_MAKE_TARGET = $(UBOOT_BIN)
--
2.5.5
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [Buildroot] [PATCH] uboot: Use "mdbtrick" target when building elf for ARC
2016-05-27 17:51 [Buildroot] [PATCH] uboot: Use "mdbtrick" target when building elf for ARC Zakharov Vlad
@ 2016-06-07 9:26 ` Vlad Zakharov
2016-06-12 19:40 ` Thomas Petazzoni
1 sibling, 0 replies; 3+ messages in thread
From: Vlad Zakharov @ 2016-06-07 9:26 UTC (permalink / raw)
To: buildroot
Hello,
On Fri, 2016-05-27 at 20:51 +0300, Zakharov Vlad wrote:
> By default position independent executables (PIE) are generated
> when building U-Boot elf target. MetaWare debugger doesn't support
> PIE (position-independent executable).
>
> In order to allow MDB load and run U-Boot elf, we need to do a
> special trick, called "mdbtrick".
>
> This special build target is used to fake generated U-Boot elf by:
> ????1. Reset PIE flag in ELF header
> ????2. Strip all debug information from elf
>
> Signed-off-by: Zakharov Vlad <vzakhar@synopsys.com>
> ---
> ?boot/uboot/uboot.mk | 4 ++++
> ?1 file changed, 4 insertions(+)
>
> diff --git a/boot/uboot/uboot.mk b/boot/uboot/uboot.mk
> index e739638..d8cdf5c 100644
> --- a/boot/uboot/uboot.mk
> +++ b/boot/uboot/uboot.mk
> @@ -38,6 +38,10 @@ endif
> ?
> ?ifeq ($(BR2_TARGET_UBOOT_FORMAT_ELF),y)
> ?UBOOT_BIN = u-boot
> +# To make elf usable for debuging on ARC use special target
> +ifeq ($(BR2_arc),y)
> +UBOOT_MAKE_TARGET = mdbtrick
> +endif
> ?else ifeq ($(BR2_TARGET_UBOOT_FORMAT_KWB),y)
> ?UBOOT_BIN = u-boot.kwb
> ?UBOOT_MAKE_TARGET = $(UBOOT_BIN)
I'm wondering if there are any comments on that patch?
Otherwise please consider to apply it.
--
Best regards,
Vlad Zakharov <vzakhar@synopsys.com>
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Buildroot] [PATCH] uboot: Use "mdbtrick" target when building elf for ARC
2016-05-27 17:51 [Buildroot] [PATCH] uboot: Use "mdbtrick" target when building elf for ARC Zakharov Vlad
2016-06-07 9:26 ` Vlad Zakharov
@ 2016-06-12 19:40 ` Thomas Petazzoni
1 sibling, 0 replies; 3+ messages in thread
From: Thomas Petazzoni @ 2016-06-12 19:40 UTC (permalink / raw)
To: buildroot
Hello,
On Fri, 27 May 2016 20:51:41 +0300, Zakharov Vlad wrote:
> By default position independent executables (PIE) are generated
> when building U-Boot elf target. MetaWare debugger doesn't support
> PIE (position-independent executable).
>
> In order to allow MDB load and run U-Boot elf, we need to do a
> special trick, called "mdbtrick".
>
> This special build target is used to fake generated U-Boot elf by:
> 1. Reset PIE flag in ELF header
> 2. Strip all debug information from elf
>
> Signed-off-by: Zakharov Vlad <vzakhar@synopsys.com>
> ---
> boot/uboot/uboot.mk | 4 ++++
> 1 file changed, 4 insertions(+)
Applied to master, thanks.
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2016-06-12 19:40 UTC | newest]
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2016-05-27 17:51 [Buildroot] [PATCH] uboot: Use "mdbtrick" target when building elf for ARC Zakharov Vlad
2016-06-07 9:26 ` Vlad Zakharov
2016-06-12 19:40 ` Thomas Petazzoni
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