[FS#465] kmodloader (ubox) Illegal intruction

[LEDE Bugs]

The following task has a new comment added:

FS#465 - kmodloader (ubox) Illegal intruction
User who did this - yousong (yousong)

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Thanks Diffie, the diffconfig was received.

The MIPS DSP ASE was enabled by the compiler because of flag "-march=74kc".  You can try adding another flag "-mno-dsp" and see if it helps


CONFIG_TARGET_OPTIMIZATION="-Os -pipe -mno-branch-likely -march=74kc -mtune=74kc"


But 74Kc should have DSP2 support and the SIGILL error should not happen.  Content of /proc/cpuinfo can help.

Below is what I got with "qemu-system-mips -M malta -cpu 74Kf" and notice the dsp and dsp2 bit in "ASEs implemented".


root at LEDE:/tmp# cat /proc/cpuinfo
system type             : MIPS Malta
machine                 : mti,malta
processor               : 0
cpu model               : MIPS 74Kc V0.0  FPU V0.0
BogoMIPS                : 695.09
wait instruction        : yes
microsecond timers      : yes
tlb_entries             : 16
extra interrupt vector  : yes
hardware watchpoint     : yes, count: 1, address/irw mask: [0x0ff8]
isa                     : mips1 mips2 mips32r1 mips32r2
ASEs implemented        : mips16 dsp dsp2
shadow register sets    : 1
kscratch registers      : 0
package                 : 0
core                    : 0
VCED exceptions         : not available
VCEI exceptions         : not available

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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=465#comment1663