From: Steven Rostedt <rostedt@goodmis.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: mingo@kernel.org, tglx@linutronix.de, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
jpoimboe@kernel.org, jbaron@akamai.com, ardb@kernel.org,
linux-kernel@vger.kernel.org, erhard_f@mailbox.org,
ndesaulniers@google.com, mhiramat@kernel.org,
sandipan.das@amd.com
Subject: Re: [PATCH 3/3] x86/static_call: Add support for Jcc tail-calls
Date: Tue, 24 Jan 2023 10:07:53 -0500 [thread overview]
Message-ID: <20230124100753.13608e1f@gandalf.local.home> (raw)
In-Reply-To: <Y8/X6fdRT80jssIf@hirez.programming.kicks-ass.net>
On Tue, 24 Jan 2023 14:06:49 +0100
Peter Zijlstra <peterz@infradead.org> wrote:
> > Just to confirm, as it's not clear if this is the static call site or one
> > of the functions that is being called.
>
> Ah, you've not looked at enough asm then? ;-) Yes this is the static
> call site, see the __SCT_ target (instruction at 0x35d).
Yeah, could you specify it a bit more in the change log such that those
looking back at this don't have to have that requirement of staring at
enough asm ;-)
It's actually been some time since I stared at compiler output (although
now that I'm starting to play with rust, that's going to start back up
soon).
-- Steve
next prev parent reply other threads:[~2023-01-24 15:08 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-23 20:59 [PATCH 0/3] static_call/x86: Handle clang's conditional tail calls Peter Zijlstra
2023-01-23 20:59 ` [PATCH 1/3] x86/alternative: Introduce int3_emulate_jcc() Peter Zijlstra
2023-01-31 14:22 ` [tip: x86/alternatives] x86/alternatives: " tip-bot2 for Peter Zijlstra
2023-01-23 20:59 ` [PATCH 2/3] x86/alternative: Teach text_poke_bp() to patch Jcc.d32 instructions Peter Zijlstra
2023-01-31 14:22 ` [tip: x86/alternatives] x86/alternatives: " tip-bot2 for Peter Zijlstra
2023-01-23 20:59 ` [PATCH 3/3] x86/static_call: Add support for Jcc tail-calls Peter Zijlstra
2023-01-23 22:44 ` Steven Rostedt
2023-01-24 13:06 ` Peter Zijlstra
2023-01-24 15:07 ` Steven Rostedt [this message]
2023-01-26 15:34 ` [PATCH v1.1 " Peter Zijlstra
2023-01-26 18:14 ` Nick Desaulniers
2023-02-06 16:07 ` Steven Rostedt
2023-01-31 14:22 ` [tip: x86/alternatives] " tip-bot2 for Peter Zijlstra
2023-02-08 22:36 ` [PATCH 0/3] static_call/x86: Handle clang's conditional tail calls Nathan Chancellor
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