On Wed, Feb 04, 2026 at 10:27:11PM +0100, Phil Sutter wrote:
> On Wed, Feb 04, 2026 at 03:20:10PM -0600, Tom Rini wrote:
> > On Wed, Feb 04, 2026 at 10:16:12PM +0100, Phil Sutter wrote:
> > > Hi,
> > >
> > > On Thu, Jan 15, 2026 at 04:19:32PM -0600, Tom Rini wrote:
> > > > With commit 0535e46d55d7 ("scripts/dtc: Update to upstream version
> > > > v1.7.2-35-g52f07dcca47c") it is now a fatal error to U-Boot if our
> > > > device tree is not 8-byte aligned. In commit f613a6e15ef7 ("ARM: OMAP2+:
> > > > Pad SPL binary to 8-byte alignment before DTB") Beleswar Padhi explains
> > > > that we must have ALIGN(x) statements inside of a section to ensure that
> > > > padding is included and not simply that the linker address counter is
> > > > incremented. To that end, this patch:
> > > > - Expands some linker sections to be more readable when adding a second
> > > > statement to the section.
> > > > - Aligns the final section before _end (for U-Boot) or
> > > > _image_binary_end or __bss_end (for xPL phases) by 8-bytes by adding
> > > > '. = ALIGN(8);' to the final section before the symbol.
> > > > - Ensure that we do have alignment by adding an ASSERT so that when not
> > > > aligned we fail to link (and explain why).
> > > > - Remove now-spurious '. = ALIGN(x);' statements that were intended to
> > > > provide the above alignments.
> > > >
> > > > Signed-off-by: Tom Rini <[email protected]>
> > >
> > > For unclear reasons, this seems to break boot via xmodem protocol on my
> > > Synology DS414. I found this commit via 'git bisect'. The symptom is:
> > >
> > > | kwboot version 2026.04-rc1-00098-g6ad0cf8f83db
> > > | Detected kwbimage v1 with SPI boot signature
> > > | Patching image boot signature to UART
> > > | Aligning image header to Xmodem block size
> > > | Sending boot message. Please reboot the target...\
> > > | Sending boot image header (67584 bytes)...
> > > | 0 %
> > > [......................................................................]
> > > | 13 %
> > > [......................................................................]
> > > | 26 %
> > > [......................................................................]
> > > | 39 %
> > > [......................................................................]
> > > | 53 %
> > > [......................................................................]
> > > | 66 %
> > > [......................................................................]
> > > | 79 %
> > > [......................................................................]
> > > | 92 % [......................................
> > > ]
> > > | Done
> > > | Missing DTB
> > > | spl_init() failed: -2
> > > | ### ERROR ### Please RESET the board ###
> > > |
> > > |
> > > | xmodem: Connection timed out
> > >
> > > Debug printf()s in fdtdec_prepare_fdt() show that fdt_check_header()
> > > returns -FDT_ERR_BADMAGIC.
> > >
> > > With HEAD at a8d982e1f1726 ("x86: cpu: Fix crash on FTRACE enabled
> > > builds"), reverting arch/arm/cpu/u-boot-spl.lds like so:
> > >
> > > | @@ -41,14 +41,21 @@ SECTIONS
> > > | __binman_sym_start = .;
> > > | KEEP(*(SORT(.binman_sym*)));
> > > | __binman_sym_end = .;
> > > | - . = ALIGN(8);
> > > | }
> > > |
> > > | + . = ALIGN(4); /* critical! */
> > > | __image_copy_end = .;
> > > | + .rel.dyn : {
> > > | + __rel_dyn_start = .;
> > > | + *(.rel*)
> > > | + __rel_dyn_end = .;
> > > | + }
> > > | +
> > > | + . = ALIGN(8);
> > > | _image_binary_end = .;
> > > | _end = .;
> > > |
> > > | - .bss : {
> > > | + .bss __rel_dyn_start (OVERLAY) : {
> > > | __bss_start = .;
> > > | *(.bss*)
> > > | . = ALIGN(8);
> > >
> > > The SPL image starts up again and continues loading the real uboot
> > > image. Note that I have no idea what these changes actually do, so I
> > > need instructions if I should dig further.
> >
> > Does:
> > https://patchwork.ozlabs.org/project/uboot/patch/[email protected]/
> > fix it?
>
> Sadly not, same result.Ugh. What file, specifically, do you send via xmodem? And so that maybe I can more easily replicate the failure, are you using the kernel.org gcc-14.2.0 toolchain or something else? -- Tom
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