On 7/18/2022 9:52 PM, Jon Hunter wrote:

[..]

This change appears to be causing the build to fail ...

/tmp/cc52xO0c.s: Assembler messages:
/tmp/cc52xO0c.s:8: Error: operand 1 should be an integer register --
`mov lr,x9'
/tmp/cc52xO0c.s:7: Error: undefined symbol lr used as an immediate value
make[2]: *** [scripts/Makefile.build:250: arch/arm64/net/bpf_jit_comp.o]
Error 1
make[1]: *** [scripts/Makefile.build:525: arch/arm64/net] Error 2

Let me know if you have any thoughts.

Sorry for this failure, but I can't reproduce it.

I guess maybe your assembler doesn't recognize "lr". Could you give a
try to replace "lr" with "x30"?

 #if IS_ENABLED(CONFIG_ARM64_BTI_KERNEL)
 "      bti j\n" /* dummy_tramp is called via "br x10" */
 #endif
-"      mov x10, lr\n"
-"      mov lr, x9\n"
+"      mov x10, x30\n"
+"      mov x30, x9\n"
 "      ret x10\n"
 "      .size dummy_tramp, .-dummy_tramp\n"
 "      .popsection\n

Thanks.

Cheers
Jon

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