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soc:2010:andreif:journal:week11 [2010/08/02 12:40] andreif created |
soc:2010:andreif:journal:week11 [2010/08/09 14:12] (current) andreif |
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| I implemented the necessary modifications today, along with gzip header parsing. If things go well, tomorrow I will decompress the first image using gPXE. After that, I will focus on getting Xen to work. | I implemented the necessary modifications today, along with gzip header parsing. If things go well, tomorrow I will decompress the first image using gPXE. After that, I will focus on getting Xen to work. | ||
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| + | ==== Day 2 [ Tue 3 Aug 2010 ] ==== | ||
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| + | Git commit: [[http://git.etherboot.org/?p=people/andreif/gpxe.git;a=commit;h=9436fefddae93ad660784f030aa95523b70dfb68|9436fefddae93ad660784f030aa95523b70dfb68]] | ||
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| + | Ported the decoding code today from the zlib library, but I didn't get to test it or arrange it properly. I am curious of the impact of calling copy_to/from_user for every byte. I'll probably have to rethink that part alltogether. | ||
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| + | ==== Day 3 [ Wed 4 Aug 2010 ] ==== | ||
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| + | Git commit: [[http://git.etherboot.org/?p=people/andreif/gpxe.git;a=commit;h=bfee6adeaa089b26f5b2ddcf684c961978889a08|bfee6adeaa089b26f5b2ddcf684c961978889a08]] | ||
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| + | Argh. Not a good day. Spent most of it chasing a silly bug. Stefan suggested that we should use the ISIZE field from the gzip trailer so we allocate all of the buffer in advance so we don't keep calling realloc. I did that, got the length from the field but I still had the original image's length in the malloc() call. Needless to say that I exceeded its bound and weird stuff started happening. Eventually I solved this and everything was fine. | ||
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| + | The code is still a mess, but it works. Tomorrow I'll remove unnecessary comments and rearrange it a bit. | ||
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| + | ==== Day 4 [ Thu 5 Aug 2010 ] ==== | ||
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| + | Git commit: [[http://git.etherboot.org/?p=people/andreif/gpxe.git;a=commit;h=17e0dcec786d5d223d7cac173d70117984bb5009|17e0dcec786d5d223d7cac173d70117984bb5009]] | ||
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| + | Cleaned the decoder code and fixed an memcpy issue which I suspect came from the fact that the source and destination fields were overlapping. Note to self: also try memmove. This still needs some work, but I am anxious to get to the Xen part and make it work, so I'll start working on that tomorrow. | ||
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| + | ==== Day 5 [ Fri 6 Aug 2010 ] ==== | ||
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| + | me.away() | ||
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| + | ==== Day 6 [ Sat 7 Aug 2010 ] ==== | ||
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| + | Today I wanted to create a basic Xen setup so I started browsing the Internet for information. After finding several sites I set out to compile the hypervisor from source and found some pre-built dom0 images. At first I struggled with getting the GRUB 2 menu entries correct since there have been some changes since GRUB legacy. Some of these changes affect multiboot images (such as Xen), so I should keep this in mind when I end up making changes. Eventuall I got to a point where the hypervisor booted, but the dom0 kernel had problems in finding the root partition. I'll dig into this tomorrow. | ||
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| + | ==== Day 7 [ Sun 8 Aug 2010 ] ==== | ||
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| + | I fixed yesterday's root partition issue by getting a new kernel and generating a new initrd. It booted, but unfortunately the keyboard does not work X| Teh horror. | ||
