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i386-emu-rdtsc : Kernel emulation of user-space RDTSC instructions on i386 and above
Some user-space applications erroneously rely on the presence of the RDTSC
instruction on x86 CPUs while they should check its support first. This leads
to Illegal Instruction signals causing the application to crash.
Mikael's patch emulates the instruction in a clever way so that the values
it returns follows a monotonous function over time.
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| Initial date: | 2006/01/30 |
| Description: | Kernel emulation of user-space RDTSC instructions on i386 and above |
| Author(s): | Mikael Pettersson |
| Conflicts with: | x86-emu |
| See also: | x86-emu |
| Abstract: | Some user-space applications erroneously rely on the presence of the RDTSC
instruction on x86 CPUs while they should check its support first. This leads
to Illegal Instruction signals causing the application to crash.
Mikael's patch emulates the instruction in a clever way so that the values
it returns follows a monotonous function over time.
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(C) Willy Tarreau - 2008-06-01