From: Alexander Viro (viro@math.psu.edu)
Date: Thu 02 Dec 1999 - 23:14:37 IST
On Thu, 2 Dec 1999, Matan Ziv-Av wrote: > 4. svgalib allocates a virtual frame buffer (at VBF), and copies the > physical one to it. > > 5. svgalib calls mmap(GM,0x10000,,,proc_self_mem_fd,VBF), so that > writes at 0x4321xxxx go to the virtual frame buffer, and not to the > physical one. > > Now, step 5 is broken. Is the same result (that of the mmap in > step 5) achievable by other means? Yes. Use anonymous mmap on the step 4 and mremap on step 5.
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