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[Bug 1894617] [NEW] qemu-i386 mmap but offset greater than 32 bits
From: |
Tony.LI |
Subject: |
[Bug 1894617] [NEW] qemu-i386 mmap but offset greater than 32 bits |
Date: |
Mon, 07 Sep 2020 09:42:42 -0000 |
Public bug reported:
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!
** Affects: qemu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1894617
Title:
qemu-i386 mmap but offset greater than 32 bits
Status in QEMU:
New
Bug description:
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!
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1894617/+subscriptions
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