Bastian Blank wrote:
On Tue, Feb 12, 2008 at 01:42:50PM -0800, H. Peter Anvin wrote:
Okay, the faulting instruction is the following:
c0383360: 0f 1f 40 00 nopl 0x0(%eax)
include/asm-x86/nops.h:
| /* P6 nops */
| /* uses eax dependencies (Intel-recommended choice) */
[...]
| #define P6_NOP4 ".byte 0x0f,0x1f,0x40,0\n"
Yes, which requires a 686-class machine; gcc is also free to use these
for -m686, so there is a userspace-visible difference, and thus the hack
to call Crusoe a 686-class machine is not correct.
Unfortunately there is no CPUID flag for these, only the CPU level.
-hpa
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