[Qemu-devel] linux-user issues

[malc]

a) elfload.c:859

   #define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned 
long)(TARGET_ELF_EXEC_PAGESIZE-1))

   This means that for 64bit guest on a 32bit host the _v's value is
   silently reduced to 32bit, the cast should be abi_ulong.

b) mmap.c:428

   real_start = start & qemu_host_page_mask;

   Same thing basically qemu_host_page_mask is unsigned long and so
   the upper bits are sliently cleared. Again qemu_host_page_mask
   should probably be abi_ulong.

The above two make elf binary with one of the segments above 4G load
and run on 32bit guest only to fail well into execution and without
any indication that it shouldn't have been allowed to run in the first
place.

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