-----Original Message----- From: Sebastian Huber <sebastian.hu...@embedded-brains.de> Sent: Friday, November 13, 2020 04:26 To: Kinsey Moore <kinsey.mo...@oarcorp.com>; devel@rtems.org Subject: Re: [PATCH 2/2] spec/aarch64: Only apply SUBALIGN(4) to ILP32
>On 12/11/2020 14:32, Kinsey Moore wrote: > >> The SUBALIGN(4) required on rtemsroset and rtemsrwset for ILP32 builds >> was previously present on LP64 builds and causes no issues within >> RTEMS, but causes relocation/alignment issues when building libbsd. >> This restricts those alignment changes to ILP32 builds. >The SUBALIGN() is currently only used on aarch64 in RTEMS. Why is it >necessary? The PowerPC port for example uses a single linkcmds.base for the >32-bit and 64-bit without a SUBALIGN(). The SUBALIGN was necessary because the default alignment was 8 bytes and the ILP32 code would fail during initialization while iterating over the linker sets since the upper half-word of every address was zeroed out and was being treated as another init call. Is there a preferred way to accomplish this that doesn't involve SUBALIGN? Given my experience with AArch64, I would expect the PowerPC linker script to need to do the same though upon review it obviously doesn't. The difference may be due to a bug in the ILP32 portions of the AArch64 toolchain since it's relatively new. Kinsey _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
