[Qemu-devel] [Bug] qemu-alpha broken on 32 bit hosts

[Stefan Weil]

All (?) syscalls fail to handle addresses larger than 32 bit correctly.
See "Bad address" in the strace ouput below.

Tested on arm and on i686 hosts with Debian's busybox-static.

$ alpha-linux-user/qemu-alpha -d unimp,guest_errors -strace
/usr/gnemul/qemu-alpha/bin/busybox ls -l block.c
host mmap_min_addr=0x1000
Reserved 0x21e000 bytes of guest address space
Relocating guest address space from 0x0000000020000000 to 0x20000000
guest_base  0x0
start    end      size     prot
0000000020000000-0000000020218000 0000000000218000 rwx
0000000040000000-0000000040002000 0000000000002000 ---
0000000040002000-0000000040802000 0000000000800000 rw-
0000000020216000-000000012021e000 0000000100008000 rwx
start_brk   0x0000000000000000
end_code    0x00000001202179bd
start_code  0x0000000120000000
start_data  0x0000000120000000
end_data    0x00000001202179bd
start_stack 0x0000000040801590
brk         0x000000012021dcb0
entry       0x00000001200d3fe0
15764 uname(0x408012d0) = 0
15764 brk(NULL) = 0x000000002021e000
15764 brk(0x000000002021ef8e) = 0x000000002021ef8e
15764 osf_getsysinfo(45,1082135520,1082136000,0,1082136475,4834034616) = 0
15764 osf_setsysinfo(14,1082135520,1082136000,0,1082136475,4834034616) = 0
15764 brk(0x0000000020240f8e) = 0x0000000020240f8e
15764 brk(0x0000000020242000) = 0x0000000020242000
15764
getxuid(1082136491,3399988123389603631,1082136000,0,1082136475,4834034616)
= 1000
15764 stat64(0x00000001201cea90,0x0000000040801290) = -1 errno=14 (Bad
address)
15764 getxgid(1082136529,1082135968,213,1,4832709268,4834034616) = 1000
15764 setgid(1000,1000,213,0,1000,4834034616) = 0
15764 setuid(1000,1000,213,0,1000,4834034616) = 0
15764 gettimeofday(1082135216,0,213,0,1000,4834034616) = 0
15764 ioctl(0,1074295912,1082135220,0,1000,4834034616) = 0
15764 lstat64("block.c",0x0000000040801220) = 0
15764 fstat64(1611596608,0x00000000408008c0) = 0
15764
mmap(NULL,1611596608,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANONYMOUS,1611596608,0x600f0340)
= 0x0000000040802000
15764 open(0x00000001201cedfe,O_RDONLY) = -1 errno=14 (Bad address)
15764 open(0x00000001201cedf3,O_RDONLY) = -1 errno=14 (Bad address)
15764 open(0x00000001201e0edf,O_RDONLY) = -1 errno=14 (Bad address)
-rw-r--r--    1 1000     1000        128079 Sep 12 07:23 block.c
15764 write(1,0,1082138624) = 65
15764 exit_group(0)