Hi Felix, On Wed, 2016-05-18 at 15:49 +0200, Felix Fietkau wrote: > On 2016-05-18 15:06, Alexey Brodkin wrote: > > > > Hi Felix, > > > > On Wed, 2016-05-18 at 14:57 +0200, Felix Fietkau wrote: > > > > > > On 2016-05-16 16:42, Alexey Brodkin wrote: > > > > > > > > > > > > If an image gets built as an Elf there's a chance > > > > it will be used by developers for debugging purposes. > > > > In that case it's very helpful to keep debugging info > > > > in that image. > > > > > > > > I would think that most OWRT-powered devices in production > > > > will use some form of binary image for booting so Elf > > > > flavours could be left a bit bulkier with more debug info > > > > inside. > > > > > > > > Signed-off-by: Alexey Brodkin <abrod...@synopsys.com> > > > You can get the bulky one directly from the kernel source directory, and > > > there is definitely some value in having stripped ELF binaries as well > > > for devices that can load them. > > Well indeed in kernel's source directory we have an unstripped elf. > > But what happens at least in case of ARC we build only one kernel's elf > > and then as a post-built step we patch in .dtb for all boards we build OWRT. > > > > In other words in "bin/arc770-uClibc" folder I have: > > 1) openwrt-arc770-generic-axs101-initramfs.elf > > 2) openwrt-arc770-generic-nsim_700-initramfs.elf > > > > Both are stripped but work as they are on the corresponding boards. > > > > In > > "build_dir/target-arc_arc700_uClibc-1.0.9/linux-arc770_generic/linux-4.4.7/" > > I have perfectly unstripped vmlinux but it won't work on either board > > because of > > missing device tree blob. > > > > That means if one wants to get image for a board X with debug symbols he or > > she > > will need to do manual patching in of .dtb. Which is not the most > > convenient thing ever. > It's a lot simpler than that: You can boot the stripped and patched elf > image from bin/ and use the vmlinux from the kernel source for the > debugger afterwards. They are fully compatible.
Good point. So indeed if we do want stuff in "bin/" folder to be stripped that seems to be the simplest approach. But what if we with addition of another config option: a) toggle kernel's CONFIG_DEBUG_INFO b) use "--strip-unneeded" instead of currently used "-S" (which is an alias to "--strip-all"). -Alexey _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
