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Diffstat (limited to 'results/scraper/launchpad-without-comments/1894617')
| -rw-r--r-- | results/scraper/launchpad-without-comments/1894617 | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/results/scraper/launchpad-without-comments/1894617 b/results/scraper/launchpad-without-comments/1894617 new file mode 100644 index 00000000..0271111b --- /dev/null +++ b/results/scraper/launchpad-without-comments/1894617 @@ -0,0 +1,23 @@ +qemu-i386 mmap but offset greater than 32 bits + +I don't know if it's a problem, but I did, and it bothered me for a long time. +When I use qemu-i386 and interact with the video card device,an error has occurred: + +18534 ioctl(4,DRM_IOCTL_MODE_GETENCODER,{39,0,0,0,0}) = 0 ({39,4,34,3,0}) +18534 ioctl(4,DRM_IOCTL_MODE_CREATE_DUMB,{1080,1920,32,0,0,0,0}) = 0 ({1080,1920,32,0,1,7680,8294400}) +18534 ioctl(4,DRM_IOCTL_MODE_ADDFB,{0,1920,1080,7680,32,24,1}) = 0 ({66,1920,1080,7680,32,24,1}) +18534 ioctl(4,DRM_IOCTL_MODE_MAP_DUMB,{1,0,0}) = 0 ({1,0,5543018496}) +18534 mmap2(NULL,8294400,PROT_READ|PROT_WRITE,MAP_SHARED,4,0x14a63c) = -1 errno=22 (Invalid argument) + +"5543018496" is the offset through ioctl() and it is "0x14a63c000". +In qemu： +ret = target_mmap(arg1, arg2, arg3, + target_to_host_bitmask(arg4, mmap_flags_tbl), + arg5, arg6 << MMAP_SHIFT); + +The type of "arg6" is ulong.When use qemu-i386, arg6 can't be set to "0x14a63c000".So it's wrong for my program. + +I want to find a good way to deal with this kind of problem, but I'm not very familiar with QEMU， +so I came to ask how to deal with this problem. + +Thank you！ \ No newline at end of file |