Hello, First, there are two different things: compiling the kernel, and compiling the root file system.
If you want to run apps with hard float/soft float, you have to compile your file system libraries (eventually the native compiler too) with hard or soft float support, accordingly. If you compile your kernel with a hard/soft float cross-compiler, the kernel code may be more or less optimized to execute its own FP code (not the code of apps). Regards, -- Fernando A. Endo, PhD student and researcher Université de Grenoble, UJF France 2015-07-16 9:38 GMT+02:00 rahul shrivastava <rshrivasta...@gmail.com>: > Hi, > > I have followed the following link to setup DVFS system in ARM FS > simulation. > *http://www.m5sim.org/Running_gem5#Experimenting_with_DVFS > <http://www.m5sim.org/Running_gem5#Experimenting_with_DVFS>* > > One of the step cross compiles the kernel with the following compiler > which compiles for hard float machines > > *arm-linux-gnueabihf.* > > However, when I cross compile the kernel with the above compiler and start > the FS simulation and login from m5term, I could see that the compiler that > kernel uses is for soft float machine and not for hard float machines > > > > *root@gem5sim:/lib# ls -l | grep -i armdrwxr-xr-x 3 root root 4096 > 2011-08-15 11:19 arm-linux-gnueabilrwxrwxrwx 1 root root 28 2011-08-15 > 11:14 ld-linux.so.3 -> arm-linux-gnueabi/ld-2.13.so <http://ld-2.13.so>* > > > I have following three questions: > 1) Shouldn't we cross compile the kernel with arm-linux-gnueabi instead of > arm-linux-gnueabihf ? > > 2) When I cross compile my project with arm-linux-gnueabi and try to > execute the binary in gem5 FS simulation, I get segfault throwing illegal > instruction. Could you shed some light on this? > > 3) I am using the following options for cross compilation of my project > > *-march=armv7 -mthumb -mthumb-interwork -mfpu=vfp -msoft-float* > Could you please let me know what other options could be required if > options are any issue? > > > Regards > Rahul > > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >
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