From: Masami Hiramatsu <mhiramat@kernel.org>
To: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@kernel.org>, X86 ML <x86@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: Re: [PATCH -tip v3 07/11] ia64: Add instruction_pointer_set() API
Date: Sat, 20 Mar 2021 10:04:28 +0900 [thread overview]
Message-ID: <20210320100428.7cd2acb7d5c084ce293249d9@kernel.org> (raw)
In-Reply-To: <161615658087.306069.12036720803234007510.stgit@devnote2>
On Fri, 19 Mar 2021 21:23:01 +0900
Masami Hiramatsu <mhiramat@kernel.org> wrote:
> 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);
> +}
Oops, this caused a build error. Thanks for the kernel test bot.
It seems that all code which accessing to the "struct ia64_psr" in asm/ptrace.h
has to be a macro, because "struct ia64_psr" is defined in the asm/processor.h
which includes asm/ptrace.h (for pt_regs?).
If the code is defined as an inline function, the "struct ia64_psr" is evaluated
at that point, and caused build error.
arch/ia64/include/asm/ptrace.h:77:16: error: dereferencing pointer to incomplete type 'struct ia64_psr'
But macro code evaluation is postponed until it is used...
Let me update it.
Thank you,
--
Masami Hiramatsu <mhiramat@kernel.org>
next prev parent reply other threads:[~2021-03-20 1:05 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 ` [PATCH -tip v3 07/11] ia64: " Masami Hiramatsu
2021-03-20 1:04 ` Masami Hiramatsu [this message]
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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