From: Masami Hiramatsu <mhiramat@kernel.org>
To: Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@kernel.org>
Cc: X86 ML <x86@kernel.org>, Masami Hiramatsu <mhiramat@kernel.org>,
Daniel Xu <dxu@dxuuu.xyz>,
linux-kernel@vger.kernel.org, bpf@vger.kernel.org,
kuba@kernel.org, mingo@redhat.com, ast@kernel.org,
tglx@linutronix.de, kernel-team@fb.com, yhs@fb.com,
Josh Poimboeuf <jpoimboe@redhat.com>,
linux-ia64@vger.kernel.org
Subject: [PATCH -tip v3 07/11] ia64: Add instruction_pointer_set() API
Date: Fri, 19 Mar 2021 21:23:01 +0900 [thread overview]
Message-ID: <161615658087.306069.12036720803234007510.stgit@devnote2> (raw)
In-Reply-To: <161615650355.306069.17260992641363840330.stgit@devnote2>
Add instruction_pointer_set() API for ia64.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
arch/ia64/include/asm/ptrace.h | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/ia64/include/asm/ptrace.h b/arch/ia64/include/asm/ptrace.h
index b3aa46090101..e382f1a6bff3 100644
--- a/arch/ia64/include/asm/ptrace.h
+++ b/arch/ia64/include/asm/ptrace.h
@@ -45,6 +45,7 @@
#include <asm/current.h>
#include <asm/page.h>
+# define ia64_psr(regs) ((struct ia64_psr *) &(regs)->cr_ipsr)
/*
* We use the ia64_psr(regs)->ri to determine which of the three
* instructions in bundle (16 bytes) took the sample. Generate
@@ -71,6 +72,12 @@ static inline long regs_return_value(struct pt_regs *regs)
return -regs->r8;
}
+static inline void instruction_pointer_set(struct pt_regs *regs, unsigned long val)
+{
+ ia64_psr(regs)->ri = (val & 0xf);
+ regs->cr_iip = (val & ~0xfULL);
+}
+
/* Conserve space in histogram by encoding slot bits in address
* bits 2 and 3 rather than bits 0 and 1.
*/
@@ -87,7 +94,6 @@ static inline long regs_return_value(struct pt_regs *regs)
/* given a pointer to a task_struct, return the user's pt_regs */
# define task_pt_regs(t) (((struct pt_regs *) ((char *) (t) + IA64_STK_OFFSET)) - 1)
-# define ia64_psr(regs) ((struct ia64_psr *) &(regs)->cr_ipsr)
# define user_mode(regs) (((struct ia64_psr *) &(regs)->cr_ipsr)->cpl != 0)
# define user_stack(task,regs) ((long) regs - (long) task == IA64_STK_OFFSET - sizeof(*regs))
# define fsys_mode(task,regs) \
next prev parent reply other threads:[~2021-03-19 12:23 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-19 12:21 [PATCH -tip v3 00/11] kprobes: Fix stacktrace with kretprobes on x86 Masami Hiramatsu
2021-03-19 12:21 ` [PATCH -tip v3 01/11] ia64: kprobes: Fix to pass correct trampoline address to the handler Masami Hiramatsu
2021-03-19 12:22 ` [PATCH -tip v3 02/11] kprobes: treewide: Replace arch_deref_entry_point() with dereference_function_descriptor() Masami Hiramatsu
2021-03-19 12:22 ` [PATCH -tip v3 03/11] kprobes: treewide: Remove trampoline_address from kretprobe_trampoline_handler() Masami Hiramatsu
2021-03-19 12:22 ` [PATCH -tip v3 04/11] kprobes: Add kretprobe_find_ret_addr() for searching return address Masami Hiramatsu
2021-03-19 12:22 ` [PATCH -tip v3 05/11] x86/kprobes: Add UNWIND_HINT_FUNC on kretprobe_trampoline code Masami Hiramatsu
2021-03-20 12:16 ` Masami Hiramatsu
2021-03-20 13:05 ` Masami Hiramatsu
2021-03-21 17:52 ` Josh Poimboeuf
2021-03-22 0:08 ` Masami Hiramatsu
2021-03-21 17:50 ` Josh Poimboeuf
2021-03-19 12:22 ` [PATCH -tip v3 06/11] ARC: Add instruction_pointer_set() API Masami Hiramatsu
2021-03-19 12:23 ` Masami Hiramatsu [this message]
2021-03-20 1:04 ` [PATCH -tip v3 07/11] ia64: " Masami Hiramatsu
2021-03-19 12:23 ` [PATCH -tip v3 08/11] kprobes: Setup instruction pointer in __kretprobe_trampoline_handler Masami Hiramatsu
2021-03-21 12:54 ` Masami Hiramatsu
2021-03-19 12:23 ` [PATCH -tip v3 09/11] x86/kprobes: Push a fake return address at kretprobe_trampoline Masami Hiramatsu
2021-03-19 12:23 ` [PATCH -tip v3 10/11] x86/unwind: Recover kretprobe trampoline entry Masami Hiramatsu
2021-03-19 12:23 ` [PATCH -tip v3 11/11] tracing: Show kretprobe unknown indicator only for kretprobe_trampoline Masami Hiramatsu
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