On Sun, Mar 27, 2022 at 02:26:20PM -0600, Simon Glass wrote:
When every member of a linker list is aligned by the compiler, we can no longer rely on the sizeof of the struct to determine the number of entries.
For example, if the struct size is 0x90 but every entry is aligned to 0xa0 by the compiler, the linker list entries takes more space in memory and the calculation of the number of entries is incorrect. For example, we may see 0x12 entries when there are only 0x11.
This is a real problem. There may be a general solution, although I cannot currently think of one. So far it only bites with OF_PLATDATA_RT which creates a pointer to each entry of the 'struct udevice' linker_list. This does not happen without that option, so it only affects SPL.
Work around it by manually calculating the aligned size of struct udevice, then using that for the n_ent calculation.
Note: the alignment fix to linker list was here:
0b2fa98aa5e linker_lists: Fix alignment issue
Signed-off-by: Simon Glass sjg@chromium.org
Applied to u-boot/master, thanks!