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ARM toolchains will sometimes optimize otherwise floating-point-free code with floating point and SIMD instructions. This was happening with systemd-bootarm.efi and it was causing U-Boot to crash and reset the CPU. U-Boot does not support the ARM VFP floating point coprocessor, which is an optional piece of hardware anyway [1]. Ensure the compiler does not generate FP/SIMD instructions by supplying the `-mgeneral-regs-only` option when building for ARM [2]. The other option you often see to solve these problems is `-msoft-float`, but that changes the ABI and prevents linking with libgnuefi. [1] https://lists.denx.de/pipermail/u-boot/2011-February/087736.html [2] https://gcc.gnu.org/onlinedocs/gcc/ARM-Options.html#index-mgeneral-regs-only-1 (cherry picked from commit 1ad6056239b70ce69ea70108cf4e49a05a9c2a1d) (cherry picked from commit 73678d2307042a45ceb3d7fe2fd182f6f6ec3f2d) (cherry picked from commit 869614a5515fd21c7c639cdbf5d96889f4316463)
systemd - System and Service Manager
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