From: Ard Biesheuvel <ardb@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: x86@kernel.org, Ard Biesheuvel <ardb@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Josh Poimboeuf <jpoimboe@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Kees Cook <kees@kernel.org>, Uros Bizjak <ubizjak@gmail.com>,
Brian Gerst <brgerst@gmail.com>,
linux-hardening@vger.kernel.org
Subject: [RFC/RFT PATCH 14/19] x86/hibernate: Prefer RIP-relative accesses
Date: Thu, 8 Jan 2026 09:25:41 +0000 [thread overview]
Message-ID: <20260108092526.28586-35-ardb@kernel.org> (raw)
In-Reply-To: <20260108092526.28586-21-ardb@kernel.org>
Replace some absolute symbol references with RIP-relative ones, to avoid
fixups at boot time. This is a prerequisite for PIE linking, which only
permits 64-bit wide loader-visible absolute references.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
arch/x86/power/hibernate_asm_64.S | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/power/hibernate_asm_64.S b/arch/x86/power/hibernate_asm_64.S
index c73be0a02a6c..173df717275a 100644
--- a/arch/x86/power/hibernate_asm_64.S
+++ b/arch/x86/power/hibernate_asm_64.S
@@ -40,7 +40,7 @@ SYM_FUNC_START(restore_registers)
movq %rax, %cr4; # turn PGE back on
/* We don't restore %rax, it must be 0 anyway */
- movq $saved_context, %rax
+ leaq saved_context(%rip), %rax
movq pt_regs_sp(%rax), %rsp
movq pt_regs_bp(%rax), %rbp
movq pt_regs_si(%rax), %rsi
@@ -71,7 +71,7 @@ SYM_FUNC_START(restore_registers)
SYM_FUNC_END(restore_registers)
SYM_FUNC_START(swsusp_arch_suspend)
- movq $saved_context, %rax
+ leaq saved_context(%rip), %rax
movq %rsp, pt_regs_sp(%rax)
movq %rbp, pt_regs_bp(%rax)
movq %rsi, pt_regs_si(%rax)
--
2.47.3
next prev parent reply other threads:[~2026-01-08 9:28 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-08 9:25 [RFC/RFT PATCH 00/19] Link the relocatable x86 kernel as PIE Ard Biesheuvel
2026-01-08 9:25 ` [RFC/RFT PATCH 01/19] x86/idt: Move idt_table to __ro_after_init section Ard Biesheuvel
2026-01-22 13:08 ` Borislav Petkov
2026-01-22 13:48 ` Ard Biesheuvel
2026-01-22 13:58 ` Borislav Petkov
2026-01-22 14:09 ` Ard Biesheuvel
2026-01-22 14:16 ` Borislav Petkov
2026-01-22 14:20 ` Ard Biesheuvel
2026-01-22 14:25 ` Borislav Petkov
2026-01-08 9:25 ` [RFC/RFT PATCH 02/19] x86/sev: Don't emit BSS_DECRYPT section unless it is in use Ard Biesheuvel
2026-01-31 14:09 ` [tip: x86/sev] x86/sev: Don't emit BSS_DECRYPTED " tip-bot2 for Ard Biesheuvel
2026-01-08 9:25 ` [RFC/RFT PATCH 03/19] x86: Combine .data with .bss in kernel mapping Ard Biesheuvel
2026-03-06 19:07 ` Borislav Petkov
2026-03-09 14:11 ` Ard Biesheuvel
2026-01-08 9:25 ` [RFC/RFT PATCH 04/19] x86: Make the 64-bit bzImage always physically relocatable Ard Biesheuvel
2026-01-12 4:01 ` H. Peter Anvin
2026-01-12 10:47 ` David Laight
2026-01-12 12:06 ` H. Peter Anvin
2026-01-08 9:25 ` [RFC/RFT PATCH 05/19] x86/efistub: Simplify early remapping of kernel text Ard Biesheuvel
2026-01-08 9:25 ` [RFC/RFT PATCH 06/19] alloc_tag: Use __ prefixed ELF section names Ard Biesheuvel
2026-01-08 9:25 ` [RFC/RFT PATCH 07/19] tools/objtool: Treat indirect ftrace calls as direct calls Ard Biesheuvel
2026-01-08 9:25 ` [RFC/RFT PATCH 08/19] x86: Use PIE codegen for the relocatable 64-bit kernel Ard Biesheuvel
2026-01-09 21:34 ` Jan Engelhardt
2026-01-09 22:07 ` Ard Biesheuvel
2026-01-08 9:25 ` [RFC/RFT PATCH 09/19] x86/pm-trace: Use RIP-relative accesses for .tracedata Ard Biesheuvel
2026-01-08 9:25 ` [RFC/RFT PATCH 10/19] x86/kvm: Use RIP-relative addressing Ard Biesheuvel
2026-01-20 17:04 ` Sean Christopherson
2026-01-20 19:43 ` David Laight
2026-01-20 20:54 ` Ard Biesheuvel
2026-01-20 22:00 ` David Laight
2026-01-08 9:25 ` [RFC/RFT PATCH 11/19] x86/rethook: Use RIP-relative reference for fake return address Ard Biesheuvel
2026-01-08 12:08 ` David Laight
2026-01-08 12:10 ` Ard Biesheuvel
2026-01-08 12:19 ` Ard Biesheuvel
2026-01-08 9:25 ` [RFC/RFT PATCH 12/19] x86/sync_core: Use RIP-relative addressing Ard Biesheuvel
2026-01-08 9:25 ` [RFC/RFT PATCH 13/19] x86/entry_64: " Ard Biesheuvel
2026-01-08 9:25 ` Ard Biesheuvel [this message]
2026-01-08 9:25 ` [RFC/RFT PATCH 15/19] x64/acpi: Use PIC-compatible references in wakeup_64.S Ard Biesheuvel
2026-01-09 5:01 ` Brian Gerst
2026-01-09 7:59 ` Ard Biesheuvel
2026-01-09 11:46 ` Brian Gerst
2026-01-09 12:09 ` Ard Biesheuvel
2026-01-09 12:10 ` Ard Biesheuvel
2026-01-09 12:51 ` Brian Gerst
2026-01-08 9:25 ` [RFC/RFT PATCH 16/19] x86/kexec: Use 64-bit wide absolute reference from relocated code Ard Biesheuvel
2026-01-08 9:25 ` [RFC/RFT PATCH 17/19] x86/head64: Avoid absolute references in startup asm Ard Biesheuvel
2026-01-08 9:25 ` [RFC/RFT PATCH 18/19] x86/boot: Implement support for RELA/RELR/REL runtime relocations Ard Biesheuvel
2026-01-08 9:25 ` [RFC/RFT PATCH 19/19] x86/kernel: Switch to PIE linking for the relocatable kernel Ard Biesheuvel
2026-01-08 16:35 ` [RFC/RFT PATCH 00/19] Link the relocatable x86 kernel as PIE Alexander Lobakin
2026-01-09 0:36 ` H. Peter Anvin
2026-01-09 9:21 ` Ard Biesheuvel
2026-01-14 18:16 ` Kees Cook
2026-01-20 20:45 ` H. Peter Anvin
2026-01-21 8:56 ` Ard Biesheuvel
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