enabling/disabling trampoline
Cristiano Ligieri Pereira
cpereira at ics.uci.edu
Mon Mar 10 15:54:30 CET 2003
Actually what I'm doing is trying the reproduce some of the results from
the paper "The performance of micro-kernel Based Systems" using
lmbench/hbench/AIM benchmarks on a P4 machine. I'm not quite sure if I
understood what you mean by generating a new C library. Where is the code
for the C library in the source tree?. Isn't there a piece of code
handling all system calls in which I could just change it instead of
changing every occurrence of "int 0x80" in my code?
Cristiano.
------------------------------------------------------------
Cristiano Ligieri Pereira - http://www.ics.uci.edu/~cpereira
On Mon, 10 Mar 2003, Frank Mehnert wrote:
> On Monday 10 March 2003 14:27, Cristiano Ligieri Pereira wrote:
> > Isn't there a quick (but perhaps not very nice or friendly) way to do it?
> > I'm kind of tight on a schedule to have this data collected.
>
> Hmm. There isn't a quick hack. You have to replace every occurrence of
> "int $0x80" in your programs by
>
> "1: \n\t"
> "pushf \n\t"
> "push %%cs \n\t"
> "pushl $2f \n\t"
> "pushl $0x402 \n\t"
> "pushl $0xa0008000 \n\t"
> "ret \n\t"
> "jmp 1b \n\t"
> "2: \n\t"
>
> So the best is to generate an extra C library for this, right?
>
> Frank
> --
> ## Dept. of Computer Science, Dresden University of Technology, Germany ##
> ## E-Mail: fm3 at os.inf.tu-dresden.de http://os.inf.tu-dresden.de/~fm3 ##
>
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