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#Hacking #Security #macOS #WTF

亮点集合:

1. 一个意外发现: 这看起来很不对劲：GPU指令内存居然是全世界可写的？
2. 不出所料，Apple就是喜欢塞一些奇怪的私有的玩意儿。(PPL/uPPL, 奇怪的特权指令)
3. 搞不好苹果还是那个1980年代的苹果，这内存管理模型怎么和当年的带Bank Switching的8位机几乎如出一辙？（误）
4. uPPL内存管理保护了L1/L2/L3页表，偏偏没保护负责区分用户空间和内核空间的TTBAT...
5. GPGPU？你的GPU有Apple的那样通用吗？人家Apple GPU甚至可以当作半个调试器来用，直接读写物理内存的那种。基本上就是 chmod 777 /dev/mem 。
6. 你需要虚拟内存？没问题，Apple GPU当然能给你模拟一个MMU出来。这下子 chmod 777 /dev/kmem 了。
7. WebGL？ WebGPU？都OUT了，现在是JavaScript写的Apple GPU模拟器！
8. 现场速通修Apple GPU模拟器的bug ...
9. 感谢Apple老铁打的15万美刀的SuperChat！

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848 viewsRynco Maekawa, 08:06

Forwarded from Hacker News

Unity silently removed clause that let you use TOS from version you shipped with (❄️ Score: 151+ in 2 days)

Link: https://readhacker.news/s/5PxQ5
Comments: https://readhacker.news/c/5PxQ5

From the gamedev community on Reddit: Unity silently removed their Github repo to track license changes, then updated their license…

Explore this post and more from the gamedev community

820 viewsRynco Maekawa, 05:27

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Forwarded from Solidot

Unity 表示在重新考虑新收费模式

2023-09-18 13:43 by 奇迹之夏

Unity 上周宣布的基于安装量的收费模式 Unity Runtime 在整个游戏行业引发了激烈争议。Unity 引擎被广泛用于制作手游和独立游戏，新收费模式将在一款游戏的年收入超过 20 万美元（或 100 万美元）之后每增加一次安装就收取最多 0.2 美元。这种收费模式既可能遭到滥用也可能意味着手游开发商基本上是给 Unity 公司打工了——手游行业流行的是免费加内购的商业模式，需要巨大的安装量。Unity 遭遇了抵制和抗议。该公司通过其官方 Twitter/X 账号表示，它听到了社区的声音，对新政策引发的困惑和担忧表示歉意，它正在与团队成员、社区、客户和合作伙伴展开讨论，将对新政策做出更改。

https://twitter.com/unity/status/1703547752205218265

#游戏

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703 viewsRynco Maekawa, 07:40

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Forwarded from 不存在的世界

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694 viewsRynco Maekawa, 10:52

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Forwarded from 每日沙雕墙 (投稿机屑人)

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775 viewsRynco Maekawa, 10:54

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1.31K viewsRynco Maekawa, 11:49

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Forwarded from Hacker News

NSA’s Backdoor Key (2002) (Score: 152+ in 4 hours)

Link: https://readhacker.news/s/5PRia
Comments: https://readhacker.news/c/5PRia

903 viewsRynco Maekawa, 15:35

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Hacker News

NSA’s Backdoor Key (2002) (Score: 152+ in 4 hours) Link: https://readhacker.news/s/5PRia Comments: https://readhacker.news/c/5PRia

In doing this I discovered that the NSA public key had an organizational name of "MiniTruth", and a common name of "Big Brother". Specifically what I saw in my debugger late one night, which was spooky for a short moment was:
O=MiniTruth CN=Big Brother

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1.04K viewsRynco Maekawa, 15:36

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https://sampruden.github.io/posts/godot-is-not-the-new-unity/

Ah yes, Godot 的 API 设计确实一团糟，估计是最开始用 Lua 留下的技术债

（但是依然支持 godot 谢谢喵，只要人多了一切都会好起来的）

Sam Pruden Does Stuff

Godot is not the new Unity - The anatomy of a Godot API call

UPDATE: This article has started an ongoing conversation with the Godot devs. They care about the issues raised, and would like to improve things. Significant improvements will almost certainly be made, although it’s still early days and it’s unclear what…

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1.01K viewsRynco Maekawa, edited 15:40

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Forwarded from 〄FW