https://github.com/laverdet created
https://github.com/llvm/llvm-project/pull/135563
This architecture implements SSVE but does not implement SVE.
More information is included in #121693
cc: @DavidSpickett
>From 5c85083f41230ec83bd862ebf2723d03d9bcfb65 Mon Sep 17 00:00:00 2001
From: Marcel Laverdet
Date: Sun, 13 Apr 2025 15:41:56 -0500
Subject: [PATCH] [lldb][AArch64] Fix Apple M4 on Linux
This architecture implements SSVE but does not implement SVE.
---
.../NativeRegisterContextLinux_arm64.cpp | 22 +--
1 file changed, 11 insertions(+), 11 deletions(-)
diff --git
a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp
b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp
index 884c7d4b9e359..f540a160c901a 100644
--- a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp
@@ -107,19 +107,19 @@
NativeRegisterContextLinux::CreateHostNativeRegisterContextLinux(
if (NativeProcessLinux::PtraceWrapper(PTRACE_GETREGSET,
native_thread.GetID(), ®set,
&ioVec, sizeof(sve_header))
-.Success()) {
+.Success())
opt_regsets.Set(RegisterInfoPOSIX_arm64::eRegsetMaskSVE);
- // We may also have the Scalable Matrix Extension (SME) which adds a
- // streaming SVE mode.
- ioVec.iov_len = sizeof(sve_header);
- regset = NT_ARM_SSVE;
- if (NativeProcessLinux::PtraceWrapper(PTRACE_GETREGSET,
-native_thread.GetID(), ®set,
-&ioVec, sizeof(sve_header))
- .Success())
-opt_regsets.Set(RegisterInfoPOSIX_arm64::eRegsetMaskSSVE);
-}
+// We may also have the Scalable Matrix Extension (SME) which adds
+// a streaming SVE mode. Note that SVE and SSVE may implemented
+// independently, which is true on Apple's M4 architecture.
+ioVec.iov_len = sizeof(sve_header);
+regset = NT_ARM_SSVE;
+if (NativeProcessLinux::PtraceWrapper(PTRACE_GETREGSET,
+ native_thread.GetID(), ®set,
+ &ioVec, sizeof(sve_header))
+.Success())
+ opt_regsets.Set(RegisterInfoPOSIX_arm64::eRegsetMaskSSVE);
sve::user_za_header za_header;
ioVec.iov_base = &za_header;
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