Bug#983416: Error in javascript library

Alberto Garcia berto at igalia.com
Fri Mar 5 10:41:57 GMT 2021

More findings from the core dump:

Program terminated with signal SIGILL, Illegal instruction.
#0  0x00007f00eb999254 in wasm_entry ()
    at ../Source/JavaScriptCore/llint/LowLevelInterpreter.cpp:547
547     ../Source/JavaScriptCore/llint/LowLevelInterpreter.cpp: No such file or directory.
[Current thread is 1 (Thread 0x7f00e4913ac0 (LWP 4154))]
(gdb) layout asm

 │0x7f00eb999254 <wasm_entry+56936>       roundss $0x2,%xmm0,%xmm1     │
 │0x7f00eb99925a <wasm_entry+56942>       movsbq 0x1(%r13,%r8,1),%r9   │
 │0x7f00eb999260 <wasm_entry+56948>       movss  %xmm1,0x0(%rbp,%r9,8) │
 │0x7f00eb999267 <wasm_entry+56955>       add    $0x3,%r8              │

So here it is, the 'roundss' opcode was added in SSE4, which this CPU
does not support.


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