I guess that makes sense. Should I submit a patch for the same as you suggested?
On Wed, Jul 25, 2018, 11:15 PM Maxime Villard <[email protected]> wrote: > Le 25/07/2018 à 19:33, Siddharth Muralee a écrit : > > KERN_BASE is used only once in dtrace and no where else - if it indeed is > > the same as VM_MIN_KERNEL_ADDRESS then we can just substitute it. > > I didn't understand how VM_MAX_ADDRESS comes there. > > Instead of taking the kernel min address, you can take the userland max > address. This userland max address is VM_MAX_ADDRESS. > > > Also why is KERNBASE > VM_MAX_KERNEL_ADDRESS in amd64 and equal to > > VM_MIN_KERNEL_ADDRESS in i386(or did you mean VM_MAX_KERNEL_ADDRESS) > > I did mean VM_MIN_KERNEL_ADDRESS. The reason is that on amd64 we are > required to put the kernel at the last 2GB of the VA space, because of the > mcmodel. So we have KERNBASE that is near the end of the VA space, and > VM_MIN_KERNEL_ADDRESS that is located before. The two areas are separate. > > On i386 however we can put the kernel wherever we want, and by default we > chose to put it at VM_MIN_KERNEL_ADDRESS. So there, VM_MIN_KERNEL_ADDRESS > equals KERNBASE. >
