Re: [PATCH v11 14/14] unwind_user/x86: Enable compat mode frame pointer unwinding on x86
From: Ingo Molnar <mingo@kernel.org>
Date: 2025-06-26 08:33:10
Also in:
bpf, lkml
* Steven Rostedt [off-list ref] wrote:
quoted hunk ↗ jump to hunk
diff --git a/arch/x86/include/asm/unwind_user_types.h b/arch/x86/include/asm/unwind_user_types.h new file mode 100644 index 000000000000..d7074dc5f0ce --- /dev/null +++ b/arch/x86/include/asm/unwind_user_types.h@@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_UNWIND_USER_TYPES_H +#define _ASM_UNWIND_USER_TYPES_H
This is not the standard x86 header guard pattern ...
+
+#ifdef CONFIG_IA32_EMULATION
+
+struct arch_unwind_user_state {
+ unsigned long ss_base;
+ unsigned long cs_base;
+};
+#define arch_unwind_user_state arch_unwind_user_stateRan out of newlines? ;-)
+/* + * If an architecture needs to initialize the state for a specific + * reason, for example, it may need to do something different + * in compat mode, it can define arch_unwind_user_init to a + * function that will perform this initialization.
Please use 'func()' when referring to functions in comments.
+/* + * If an architecture requires some more updates to the state between + * stack frames, it can define arch_unwind_user_next to a function + * that will update the state between reading stack frames during + * the user space stack walk.
Ditto. Thanks, Ingo