Add initial big-endian support #1812
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cmuellner
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Dec 18, 2025
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cmuellner
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cmuellner
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Thanks for providing this PR!
Besides the issue with the linux headers, I have two more comments:
- We should probaby add at least one CI/CD job to build a BE toolchain
- What is the status of the GCC testsuite when building a BE toolchain?
| #ifndef _ASM_RISCV_BYTEORDER_H | ||
| #define _ASM_RISCV_BYTEORDER_H | ||
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| #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
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All linux headers are copied without modification as we don't want downstream changes here.
If we add such non-upstream changes, then there is a risk of breaking the BE build each time we update the linux headers.
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This series adds initial big-endian support:
--with-endianflag.rv64gcv-lp64dmultilib option when building the Linux toolchain.We are working on upstreaming GDB and GCC changes as well. The GDB changes are required for running big-endian tests, as QEMU currently has no big-endian support.