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Fair enough. TBH, I wasn't even sure if you recognized the text, or were just puzzled by the date. Hey, these days, I'm sure that there are a lot of people who wouldn't, especially on an international forum - AFAICT, it was sort of a period thing from the 1960s through 1980s and early 1990s, and mostly in the US, UK and parts of Northern Europe (in the 1940s and 1950s it was overshadowed by Animal Farm, and not highly regarded until around 1965 I gather), and while most educated people know of the book, it seems that not all that many have actually read it.

I seem to recall hearing that it had some popularity in Russia after 1991, but I don't know if that lasted very long; since I don't know how old you are off hand, I wasn't sure if you would have read it or not. Mind you, I would not expect some of the younger crowd to know it regardless - while the theme certainly has relevance, a lot of people seem to think the book itself is dated and quaint, and it seems to be dropping out of high school and college reading lists over time.

Schol-R-LEA wrote:I seem to recall hearing that it had some popularity in Russia after 1991, but I don't know if that lasted very long; since I don't know how old you are off hand, I wasn't sure if you would have read it or not.

Orwell has gained some popularity again because of Russia's current internal problems.

That makes quite a bit of sense, OK.

Schol-R-LEA wrote:Fair enough. TBH, I wasn't even sure if you recognized the text, or were just puzzled by the date. Hey, these days, I'm sure that there are a lot of people who wouldn't, especially on an international forum - AFAICT, it was sort of a period thing from the 1960s through 1980s and early 1990s, and mostly in the US, UK and parts of Northern Europe (in the 1940s and 1950s it was overshadowed by Animal Farm, and not highly regarded until around 1965 I gather), and while most educated people know of the book, it seems that not all that many have actually read it.

I seem to recall hearing that it had some popularity in Russia after 1991, but I don't know if that lasted very long; since I don't know how old you are off hand, I wasn't sure if you would have read it or not. Mind you, I would not expect some of the younger crowd to know it regardless - while the theme certainly has relevance, a lot of people seem to think the book itself is dated and quaint, and it seems to be dropping out of high school and college reading lists over time.

I didn't read it, but I know its contents: this is 1984 year, this is totalitaristic state named Oceania, and everything is controlled with government.

Well, I used it for testing as it was the only book I had in raw text format, also amongst most young(16-~24) programmers I know 1984 is a very common book to have read.

I decided to set the WP bit to prevent my kernel from writing to read-only pages. Unfortunately quite a lot of paging structures had their RW bit clear, making them read-only when they should actualyl be writeable. Running the kernel in this state caused a lot of exceptions which led to more exceptions, causing the stack to overflow, write all over video memory, and keep going until it reached non-present memory and triple faulted.

Hi,

mariuszp wrote:I decided to set the WP bit to prevent my kernel from writing to read-only pages. Unfortunately quite a lot of paging structures had their RW bit clear, making them read-only when they should actualyl be writeable. Running the kernel in this state caused a lot of exceptions which led to more exceptions, causing the stack to overflow, write all over video memory, and keep going until it reached non-present memory and triple faulted.

You should had set the WP bit the first time you implemented paging. These exceptions, stack overflows, overwriting video memory and triple faults would not happen now.

By the way, I have the WP bit set from the time I added paging to one of my official branches.


Regards,
glauxosdever

glauxosdever wrote:Hi,

mariuszp wrote:I decided to set the WP bit to prevent my kernel from writing to read-only pages. Unfortunately quite a lot of paging structures had their RW bit clear, making them read-only when they should actualyl be writeable. Running the kernel in this state caused a lot of exceptions which led to more exceptions, causing the stack to overflow, write all over video memory, and keep going until it reached non-present memory and triple faulted.

You should had set the WP bit the first time you implemented paging. These exceptions, stack overflows, overwriting video memory and triple faults would not happen now.

By the way, I have the WP bit set from the time I added paging to one of my official branches.


Regards,
glauxosdever

Yeah.. if only I knew it existed at that time

My new font rendering with cairo appears to cause some issues.

max wrote:My new font rendering with cairo appears to cause some issues.

My first question would be why?

This is how double buffering should look in 12h, right?

lukaandjelkovic wrote:My first question would be why?

I think it's related to some illegal memory access, I had this before but I have to figure out what the exact problem is there

max wrote:

lukaandjelkovic wrote:My first question would be why?

I think it's related to some illegal memory access, I had this before but I have to figure out what the exact problem is there

Oh OK... I'm just impressed with your UI style. That makes your OS very attractive.

lukaandjelkovic wrote:Oh OK... I'm just impressed with your UI style. That makes your OS very attractive.

Thanks!! I really enjoy creating UIs

Chaos has ensued in some part (or parts) of my OS. I'm still trying to figure out what went wrong. Yesterday I implemented mutexes and semaphores in userspace, and as I tried installing the GUI package, the filesystem driver paniced due to some data corruption. Upon reboot, the OS decided to format the drive and re-install itself (that's how corrupt the filesystem has become), and after installing the GUI package, I attempted to start the GUI. It came up with a black screen, randomly-plotted pixels (which in fact depend on which video mode is in use!!) and a functional mouse cursor. I pressed F11 to force a kernel panic and see the console, and I could see that for some reason, libpng suddenly fails to read some PNG files (probably the wallpaper); no GUI application started either.