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[Qemu-devel] shm problem

From: Alexander Graf
Subject: [Qemu-devel] shm problem
Date: Fri, 22 Jun 2007 17:21:14 +0200
User-agent: Thunderbird (X11/20060911)


when using mmap with qemu-i386 on x86_64 it's quite simple to get 32-bit
pointers back (using the MAP_32BIT flag, thanks to Kirill for the patch).

I'm currently in the need for shared memory though, so I need shmat() to
return something within the lower 31 Bits as well.

shmget(0x56a4d5, 488, IPC_CREAT|0660)   = 11075627
shmat(11075627, 0, 0)                   = 0x2b4ceb29e000

Does anyone have an idea how to get around this and force shmat to
return something a 32-bit target can handle? In the end it only calls
mmap too...



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