f9bd2b74be
2. Fixed bug [ 989478 ] I-Cache and undefined Instruktions The L4 microkernel uses an undefined instruction to trap for a special requests into the kernel (LOCK NOP). The handler fixes this up and gives the user a special code page with syscall stubs. If you're not using the I-Cache optimization everthing works find on bochs. But if you enable the I-Cache (--enable-icache), then the undefined opcode exception is thrown only once for ever virtual address it occurs. See the demodisk of the L4KA::pistachio (http://www.l4ka.org/projects/pistachio/download.php). In this case the pingpong benchmark of this demo is of interest. Everything runs fine until the program tries to spawn a new task for its measurements. This new task shares the code of the creating program. But the new task stops executing at the undefined instruction explained above and no exception is thrown. |
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| .. | ||
| Makefile.in | ||
| memory.cc | ||
| memory.h | ||
| misc_mem.cc | ||