From: Peter Zijlstra <peterz@infradead.org>
To: Sathvika Vasireddy <sv@linux.ibm.com>
Cc: nathan@kernel.org, nsc@kernel.org, maddy@linux.ibm.com,
mpe@ellerman.id.au, npiggin@gmail.com, chleroy@kernel.org,
jpoimboe@kernel.org, ojeda@kernel.org, masahiroy@kernel.org,
lossin@kernel.org, tamird@kernel.org,
thomas.weissschuh@linutronix.de, rostedt@goodmis.org,
ihor.solodrai@linux.dev, thuth@redhat.com, pmladek@suse.com,
aliceryhl@google.com, elver@google.com, kees@kernel.org,
legion@kernel.org, ardb@kernel.org, yuxuan.zuo@outlook.com,
alexghiti@rivosinc.com, alexandre.chartre@oracle.com,
bp@alien8.de, linux-kbuild@vger.kernel.org,
linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v1 1/6] objtool/powerpc: Add build-time fixup of alternate feature branch targets
Date: Tue, 5 May 2026 16:45:39 +0200 [thread overview]
Message-ID: <20260505144539.GX3126523@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <20260505084628.17940-2-sv@linux.ibm.com>
On Tue, May 05, 2026 at 02:16:23PM +0530, Sathvika Vasireddy wrote:
> switch (opcode) {
> + case 16:
Like case 18 below, this wants a comment describing which instruction
this is; bclr ?
> + if (ins & 1)
> + typ = INSN_OTHER;
> + else
> + typ = INSN_JUMP_CONDITIONAL;
> + imm = ins & 0xfffc;
> + if (imm & 0x8000)
> + imm -= 0x10000;
> + insn->immediate = imm | aa;
> + break;
> +
> case 18: /* b[l][a] */
> if (ins == 0x48000005) /* bl .+4 */
> typ = INSN_OTHER;
next prev parent reply other threads:[~2026-05-05 14:46 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-05 8:46 [PATCH v1 0/6] objtool: Fixup alternate feature relative addresses Sathvika Vasireddy
2026-05-05 8:46 ` [PATCH v1 1/6] objtool/powerpc: Add build-time fixup of alternate feature branch targets Sathvika Vasireddy
2026-05-05 14:45 ` Peter Zijlstra [this message]
2026-05-05 14:49 ` Peter Zijlstra
2026-05-05 15:48 ` Christophe Leroy (CS GROUP)
2026-05-05 15:56 ` Segher Boessenkool
2026-05-05 8:46 ` [PATCH v1 2/6] objtool: Set ELF_F_LAYOUT flag to preserve vmlinux segment layout Sathvika Vasireddy
2026-05-05 8:46 ` [PATCH v1 3/6] objtool: Fix "can't find starting instruction" warnings on vmlinux Sathvika Vasireddy
2026-05-05 8:46 ` [PATCH v1 4/6] objtool/powerpc: Skip jump destination analysis and unnanotated intra-function call warnings for --ftr-fixup Sathvika Vasireddy
2026-05-05 8:46 ` [PATCH v1 5/6] kbuild: Add objtool integration for PowerPC feature fixups Sathvika Vasireddy
2026-05-05 8:46 ` [PATCH v1 6/6] powerpc: Enable build-time feature fixup processing by default Sathvika Vasireddy
2026-05-05 9:05 ` [PATCH v1 0/6] objtool: Fixup alternate feature relative addresses Christophe Leroy (CS GROUP)
2026-05-05 11:40 ` Peter Zijlstra
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