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how can I use "shadow call stack" feature of clang-8 in x86_64?


how can I use "shadow call stack" feature of clang-8 in x86_64?

By : Alok Pankaj
Date : September 23 2020, 11:00 AM
hope this fix your issue The problem is, that the runtime environment has to initialize the gs register to point to a location, where the shadow call stack can be stored. This is not said very explicitly, but can be derived from the Clang documentation:
code :
arch_prctl(ARCH_SET_GS, baseaddr);


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After update to Mac OS 10.8: "Undefined symbols for architecture x86_64"; "clang: error: linker command f

After update to Mac OS 10.8: "Undefined symbols for architecture x86_64"; "clang: error: linker command f


By : DJ CRIZMO
Date : March 29 2020, 07:55 AM
Does that help (Answered by the OP in a question edit. Converted to a community wiki answer. See Question with no answers, but issue solved in the comments (or extended in chat) )
The OP wrote:
code :
/usr/bin/clang++
-stdlib=libstdc++
Shadow stack implementation on x86_64

Shadow stack implementation on x86_64


By : Wang Yang
Date : March 29 2020, 07:55 AM
will be helpful for those in need I think the idea for 32-bit CFI is to set a limit on DS/ES/SS, and put the shadow stack outside that, so it can only be corrupted by instructions with a gs: segment override prefix.
This only works in compat mode (32-bit user-space) on x86-64, because CS/DS/ES/SS have fixed base=0 and no limit when the CPU is in long mode.
PostSharp displays call stack as "Aspect Code" and makes call stack less usable

PostSharp displays call stack as "Aspect Code" and makes call stack less usable


By : user1819878
Date : March 29 2020, 07:55 AM
will help you By default, PostSharp extension in Visual Studio hides the aspect and generated code in the call stack view to make it cleaner and easier to use.
You can disable this feature by opening PostSharp options dialogue and enabling option "Show aspect code in call stack".
Is "Call stack" the same as "Execution context stack" in JavaScript?

Is "Call stack" the same as "Execution context stack" in JavaScript?


By : KarelKremel
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Сall Stack and Execution Stack are different names for the same thing. It is a LIFO stack that is used to store execution contexts created during code execution.
Wikipedia says: "This kind of stack is also known as an execution stack, program stack, control stack, run-time stack, or machine stack" https://en.wikipedia.org/wiki/Call_stack
npm install fails with "Permission denied" and "Maximum call stack size exceeded" errors

npm install fails with "Permission denied" and "Maximum call stack size exceeded" errors


By : user2792966
Date : March 29 2020, 07:55 AM
To fix the issue you can do Trying to globally install pouchdb-server on a DO Ubuntu instance (npm install -g pouchdb-server). I'm logged in as the root user. , try this ::
code :
npm config set user 0

npm config set unsafe-perm true
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