linux-kernel - [PATCH -tip v7 07/13] ia64: Add instruction_pointer

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Message-Id: <162209761027.436794.703331939926656169.stgit@devnote2>
Date:   Thu, 27 May 2021 15:40:10 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...nel.org>
Cc:     X86 ML <x86@...nel.org>, Masami Hiramatsu <mhiramat@...nel.org>,
        Daniel Xu <dxu@...uu.xyz>, linux-kernel@...r.kernel.org,
        bpf@...r.kernel.org, kuba@...nel.org, mingo@...hat.com,
        ast@...nel.org, tglx@...utronix.de, kernel-team@...com, yhs@...com,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        linux-ia64@...r.kernel.org,
        Abhishek Sagar <sagar.abhishek@...il.com>,
        Andrii Nakryiko <andrii.nakryiko@...il.com>
Subject: [PATCH -tip v7 07/13] ia64: Add instruction_pointer_set() API

Add instruction_pointer_set() API for ia64.

Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
---
  Changes in v4:
   - Make the API macro for avoiding a build error.
---
 arch/ia64/include/asm/ptrace.h |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/ia64/include/asm/ptrace.h b/arch/ia64/include/asm/ptrace.h
index 08179135905c..a024afbc70e5 100644
--- a/arch/ia64/include/asm/ptrace.h
+++ b/arch/ia64/include/asm/ptrace.h
@@ -51,6 +51,11 @@
  * the canonical representation by adding to instruction pointer.
  */
 # define instruction_pointer(regs) ((regs)->cr_iip + ia64_psr(regs)->ri)
+# define instruction_pointer_set(regs, val)	\
+  ({						\
+	ia64_psr(regs)->ri = (val & 0xf);	\
+	regs->cr_iip = (val & ~0xfULL);		\
+  })
 
 static inline unsigned long user_stack_pointer(struct pt_regs *regs)
 {