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arm: Update linker scripts to ensure appended device tree is aligned

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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 85f586035d75 ("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.

Tested-by: Michal Simek <michal.simek@amd.com> # Zynq
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
[trini: Also update arch/arm/cpu/armv8/u-boot.lds as Ilas requested]
Signed-off-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Tom Rini 2026-01-15 16:19:32 -06:00
parent 90efb8d394
commit 8b0ebe054b
17 changed files with 72 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/arm/cpu/arm1136/u-boot-spl.lds
View File

@ -30,8 +30,10 @@ SECTIONS
.rodata : { *(SORT_BY_ALIGNMENT(.rodata*)) } >.sram
. = ALIGN(4);
.data : { *(SORT_BY_ALIGNMENT(.data*)) } >.sram
. = ALIGN(4);
.data : {
*(SORT_BY_ALIGNMENT(.data*))
. = ALIGN(8);
} >.sram
__image_copy_end = .;
_end = .;
@ -44,3 +46,5 @@ SECTIONS
__bss_end = .;
} >.sdram
}
ASSERT(_end % 8 == 0, "_end must be 8-byte aligned for device tree");

5
arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds
View File

@ -45,7 +45,7 @@ SECTIONS
. = ALIGN(4);
__bss_start = .;
*(.bss*)
. = ALIGN(4);
. = ALIGN(8);
__bss_end = .;
}
@ -62,3 +62,6 @@ SECTIONS
.gnu : { *(.gnu*) }
.ARM.exidx : { *(.ARM.exidx*) }
}
ASSERT(_image_binary_end % 8 == 0, \
"_image_binary_end must be 8-byte aligned for device tree");

5
arch/arm/cpu/arm926ejs/sunxi/u-boot-spl.lds
View File

@ -31,9 +31,9 @@ SECTIONS
. = ALIGN(4);
__u_boot_list : {
KEEP(*(SORT(__u_boot_list*)));
. = ALIGN(8);
} > .sram
. = ALIGN(4);
__image_copy_end = .;
_end = .;
_image_binary_end = .;
@ -47,3 +47,6 @@ SECTIONS
__bss_end = .;
} > .sdram
}
ASSERT(_image_binary_end % 8 == 0, \
"_image_binary_end must be 8-byte aligned for device tree");

5
arch/arm/cpu/armv7/sunxi/u-boot-spl.lds
View File

@ -40,9 +40,9 @@ SECTIONS
. = ALIGN(4);
__u_boot_list : {
KEEP(*(SORT(__u_boot_list*)));
. = ALIGN(8);
} > .sram
. = ALIGN(4);
__image_copy_end = .;
_end = .;
_image_binary_end = .;
@ -56,3 +56,6 @@ SECTIONS
__bss_end = .;
} > .sdram
}
ASSERT(_image_binary_end % 8 == 0, \
"_image_binary_end must be 8-byte aligned for device tree");

4
arch/arm/cpu/armv8/u-boot-spl.lds
View File

@ -52,9 +52,9 @@ SECTIONS
__u_boot_list : {
. = ALIGN(8);
KEEP(*(SORT(__u_boot_list*)));
. = ALIGN(8);
} >.sram
. = ALIGN(8);
__image_copy_end = .;
_end = .;
_image_binary_end = .;
@ -89,5 +89,7 @@ SECTIONS
#endif
}
ASSERT(_image_binary_end % 8 == 0, \
"_image_binary_end must be 8-byte aligned for device tree");
ASSERT(ADDR(.bss) % 8 == 0, \
".bss must be 8-byte aligned");

3
arch/arm/cpu/armv8/u-boot.lds
View File

@ -146,6 +146,7 @@ SECTIONS
__rel_dyn_start = .;
*(.rela*)
__rel_dyn_end = .;
. = ALIGN(8);
}
_end = .;
@ -175,3 +176,5 @@ SECTIONS
#include "linux-kernel-image-header-vars.h"
#endif
}
ASSERT(_end % 8 == 0, "_end must be 8-byte aligned for device tree");

5
arch/arm/cpu/u-boot-spl.lds
View File

@ -51,9 +51,9 @@ SECTIONS
__rel_dyn_start = .;
*(.rel*)
__rel_dyn_end = .;
. = ALIGN(8);
}
. = ALIGN(8);
_image_binary_end = .;
_end = .;
@ -80,6 +80,9 @@ ASSERT(__image_copy_end - __image_copy_start <= (IMAGE_MAX_SIZE), \
"SPL image too big");
#endif
ASSERT(_image_binary_end % 8 == 0, \
"_image_binary_end must be 8-byte aligned for device tree");
#if defined(CONFIG_SPL_BSS_MAX_SIZE)
ASSERT(__bss_end - __bss_start <= (CONFIG_SPL_BSS_MAX_SIZE), \
"SPL image BSS too big");

4
arch/arm/cpu/u-boot.lds
View File

@ -164,6 +164,7 @@ SECTIONS
__rel_dyn_start = .;
*(.rel*)
__rel_dyn_end = .;
. = ALIGN(8);
}
_end = .;
@ -192,3 +193,6 @@ SECTIONS
/DISCARD/ : { *(.ARM.exidx*) }
/DISCARD/ : { *(.gnu.linkonce.armexidx.*) }
}
ASSERT(_image_binary_end % 8 == 0, \
"_image_binary_end must be 8-byte aligned for device tree");

4
arch/arm/mach-aspeed/ast2600/u-boot-spl.lds
View File

@ -59,6 +59,7 @@ SECTIONS
__rel_dyn_start = .;
*(.rel*)
__rel_dyn_end = .;
. = ALIGN(8);
} > .nor
_end = .;
@ -79,6 +80,9 @@ ASSERT(__image_copy_end - __image_copy_start <= (IMAGE_MAX_SIZE), \
"SPL image too big");
#endif
ASSERT(_image_binary_end % 8 == 0, \
"_image_binary_end must be 8-byte aligned for device tree");
#if defined(CONFIG_SPL_BSS_MAX_SIZE)
ASSERT(__bss_end - __bss_start <= (CONFIG_SPL_BSS_MAX_SIZE), \
"SPL image BSS too big");

9
arch/arm/mach-at91/arm926ejs/u-boot-spl.lds
View File

@ -29,9 +29,11 @@ SECTIONS
.data : { *(SORT_BY_ALIGNMENT(.data*)) } >.sram
. = ALIGN(4);
__u_boot_list : { KEEP(*(SORT(__u_boot_list*))) } > .sram
__u_boot_list : {
KEEP(*(SORT(__u_boot_list*)))
. = ALIGN(8);
} > .sram
. = ALIGN(4);
__image_copy_end = .;
_end = .;
_image_binary_end = .;
@ -51,6 +53,9 @@ ASSERT(__image_copy_end - __start <= (IMAGE_MAX_SIZE), \
"SPL image too big");
#endif
ASSERT(_image_binary_end % 8 == 0, \
"_image_binary_end must be 8-byte aligned for device tree");
#if defined(CONFIG_SPL_BSS_MAX_SIZE)
ASSERT(__bss_end - __bss_start <= (CONFIG_SPL_BSS_MAX_SIZE), \
"SPL image BSS too big");

9
arch/arm/mach-at91/armv7/u-boot-spl.lds
View File

@ -36,9 +36,11 @@ SECTIONS
.data : { *(SORT_BY_ALIGNMENT(.data*)) } >.sram
. = ALIGN(4);
__u_boot_list : { KEEP(*(SORT(__u_boot_list*))) } > .sram
__u_boot_list : {
KEEP(*(SORT(__u_boot_list*)))
. = ALIGN(8);
} > .sram
. = ALIGN(4);
__image_copy_end = .;
_end = .;
_image_binary_end = .;
@ -52,3 +54,6 @@ SECTIONS
__bss_end = .;
} >.sdram
}
ASSERT(_image_binary_end % 8 == 0, \
"_image_binary_end must be 8-byte aligned for device tree");

3
arch/arm/mach-omap2/u-boot-spl.lds
View File

@ -51,3 +51,6 @@ SECTIONS
__bss_end = .;
} >.sdram
}
ASSERT(_image_binary_end % 8 == 0, \
"_image_binary_end must be 8-byte aligned for device tree");

5
arch/arm/mach-rockchip/u-boot-tpl-v8.lds
View File

@ -42,9 +42,9 @@ SECTIONS
__u_boot_list : {
. = ALIGN(8);
KEEP(*(SORT(__u_boot_list*)));
. = ALIGN(8);
}
. = ALIGN(8);
__image_copy_end = .;
_end = .;
_image_binary_end = .;
@ -69,6 +69,9 @@ ASSERT(__image_copy_end - __image_copy_start < (CONFIG_TPL_MAX_SIZE), \
"TPL image too big");
#endif
ASSERT(_image_binary_end % 8 == 0, \
"_image_binary_end must be 8-byte aligned for device tree");
#if defined(CONFIG_TPL_BSS_MAX_SIZE)
ASSERT(__bss_end - __bss_start < (CONFIG_TPL_BSS_MAX_SIZE), \
"TPL image BSS too big");

6
arch/arm/mach-zynq/u-boot-spl.lds
View File

@ -39,10 +39,9 @@ SECTIONS
. = ALIGN(4);
__u_boot_list : {
KEEP(*(SORT(__u_boot_list*)));
. = ALIGN(8);
} > .sram
. = ALIGN(4);
_image_binary_end = .;
_end = .;
@ -62,3 +61,6 @@ SECTIONS
/DISCARD/ : { *(.interp*) }
/DISCARD/ : { *(.gnu*) }
}
ASSERT(_image_binary_end % 8 == 0, \
"_image_binary_end must be 8-byte aligned for device tree");

3
arch/arm/mach-zynq/u-boot.lds
View File

@ -66,6 +66,7 @@ SECTIONS
__rel_dyn_start = .;
*(.rel*)
__rel_dyn_end = .;
. = ALIGN(8);
}
_end = .;
@ -98,3 +99,5 @@ SECTIONS
/DISCARD/ : { *(.ARM.exidx*) }
/DISCARD/ : { *(.gnu.linkonce.armexidx.*) }
}
ASSERT(_end % 8 == 0, "_end must be 8-byte aligned for device tree");

4
board/davinci/da8xxevm/u-boot-spl-da850evm.lds
View File

@ -43,6 +43,7 @@ SECTIONS
__rel_dyn_start = .;
*(.rel*)
__rel_dyn_end = .;
. = ALIGN(8);
} >.sram
__image_copy_end = .;
@ -58,3 +59,6 @@ SECTIONS
__bss_end = .;
} >.sdram
}
ASSERT(_image_binary_end % 8 == 0, \
"_image_binary_end must be 8-byte aligned for device tree");

5
board/samsung/common/exynos-uboot-spl.lds
View File

@ -48,7 +48,10 @@ SECTIONS
. = ALIGN(4);
__bss_start = .;
*(.bss*)
. = ALIGN(4);
. = ALIGN(8);
__bss_end = .;
} >.sram
}
ASSERT(__bss_end % 8 == 0, \
"__bss_end must be 8-byte aligned for device tree");