https://github.com/kees closed https://github.com/llvm/llvm-project/pull/89707
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https://github.com/efriedma-quic approved this pull request.
LGTM
https://github.com/llvm/llvm-project/pull/89707
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@@ -4781,6 +4782,7 @@ CodeGenModule::CreateRuntimeFunction(llvm::FunctionType
*FTy, StringRef Name,
}
}
setDSOLocal(F);
+ markRegisterParameterAttributes(F);
kees wrote:
Ah-ha, thanks! Okay, I've updated the comments with just a
https://github.com/kees updated https://github.com/llvm/llvm-project/pull/89707
>From c061c8f49f2b916bb5e60ec35d3e448ac13f2b72 Mon Sep 17 00:00:00 2001
From: Kees Cook
Date: Mon, 22 Apr 2024 17:53:32 -0700
Subject: [PATCH 1/4] [CodeGen][i386] Move -mregparm storage earlier and fix
Runtime
@@ -4781,6 +4782,7 @@ CodeGenModule::CreateRuntimeFunction(llvm::FunctionType
*FTy, StringRef Name,
}
}
setDSOLocal(F);
+ markRegisterParameterAttributes(F);
efriedma-quic wrote:
Suggested text on the clang change:
FIXME: We should
@@ -62,6 +62,13 @@ namespace llvm {
LibFunc TheLibFunc, AttributeList AttributeList,
FunctionType *Invalid, ArgsTy... Args) = delete;
+ // Handle -mregparm for the given function.
+ // FIXME: This should likely be implemented in
+
@@ -4781,6 +4782,7 @@ CodeGenModule::CreateRuntimeFunction(llvm::FunctionType
*FTy, StringRef Name,
}
}
setDSOLocal(F);
+ markRegisterParameterAttributes(F);
kees wrote:
Comment added. Is this what you had in mind?
https://github.com/kees updated https://github.com/llvm/llvm-project/pull/89707
>From c061c8f49f2b916bb5e60ec35d3e448ac13f2b72 Mon Sep 17 00:00:00 2001
From: Kees Cook
Date: Mon, 22 Apr 2024 17:53:32 -0700
Subject: [PATCH 1/3] [CodeGen][i386] Move -mregparm storage earlier and fix
Runtime
@@ -4781,6 +4782,7 @@ CodeGenModule::CreateRuntimeFunction(llvm::FunctionType
*FTy, StringRef Name,
}
}
setDSOLocal(F);
+ markRegisterParameterAttributes(F);
efriedma-quic wrote:
Sign/zero-extend attributes led to real issues on some
@@ -4781,6 +4782,7 @@ CodeGenModule::CreateRuntimeFunction(llvm::FunctionType
*FTy, StringRef Name,
}
}
setDSOLocal(F);
+ markRegisterParameterAttributes(F);
kees wrote:
This seems like a large proposed change; is it worth it for
@@ -4781,6 +4782,7 @@ CodeGenModule::CreateRuntimeFunction(llvm::FunctionType
*FTy, StringRef Name,
}
}
setDSOLocal(F);
+ markRegisterParameterAttributes(F);
efriedma-quic wrote:
To clarify, the code in llvm/ still needs to exist
@@ -4781,6 +4782,7 @@ CodeGenModule::CreateRuntimeFunction(llvm::FunctionType
*FTy, StringRef Name,
}
}
setDSOLocal(F);
+ markRegisterParameterAttributes(F);
efriedma-quic wrote:
Zero/sign-extend attributes are also missing, I think.
@@ -4781,6 +4782,7 @@ CodeGenModule::CreateRuntimeFunction(llvm::FunctionType
*FTy, StringRef Name,
}
}
setDSOLocal(F);
+ markRegisterParameterAttributes(F);
kees wrote:
Oh, I think I see what you mean -- this is the common place
@@ -4781,6 +4782,7 @@ CodeGenModule::CreateRuntimeFunction(llvm::FunctionType
*FTy, StringRef Name,
}
}
setDSOLocal(F);
+ markRegisterParameterAttributes(F);
kees wrote:
I was trying to basically duplicate what was already done for
https://github.com/kees updated https://github.com/llvm/llvm-project/pull/89707
>From c061c8f49f2b916bb5e60ec35d3e448ac13f2b72 Mon Sep 17 00:00:00 2001
From: Kees Cook
Date: Mon, 22 Apr 2024 17:53:32 -0700
Subject: [PATCH 1/2] [CodeGen][i386] Move -mregparm storage earlier and fix
Runtime
@@ -4781,6 +4782,7 @@ CodeGenModule::CreateRuntimeFunction(llvm::FunctionType
*FTy, StringRef Name,
}
}
setDSOLocal(F);
+ markRegisterParameterAttributes(F);
efriedma-quic wrote:
This really shouldn't work this way: we should go
kees wrote:
This needs test cases, which I'll add tomorrow. I just wanted to get the core
logic up for review before I hit EOD...
https://github.com/llvm/llvm-project/pull/89707
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llvmbot wrote:
@llvm/pr-subscribers-clang
Author: Kees Cook (kees)
Changes
When building the Linux kernel for i386, the -mregparm=3 option is enabled.
Crashes were observed in the sanitizer handler functions, and the problem was
found to be mismatched calling convention.
As was fixed
https://github.com/kees created https://github.com/llvm/llvm-project/pull/89707
When building the Linux kernel for i386, the -mregparm=3 option is enabled.
Crashes were observed in the sanitizer handler functions, and the problem was
found to be mismatched calling convention.
As was fixed in
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