From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1520974837; cv=none; d=google.com; s=arc-20160816; b=vsFLvV3FN/MJgTAFkxHNXOgiuhPC+ZxP9Ow+2xMh+JT847M+kMExvcopj9dOageF40 rVbg8UcFAiqGY8pXwCVq/2BQqupKAf9uEr2eCXKKOcprNL47Ji4zZlVubZbqHBfPt80c LZk2Mze6cVHu7Ij6hKRspY3spjo8VgYmjEeCoqPuLdBHFJAQBY4TpTBZ/opakGct9S6D Fv+oBpChdlilrSU1Pmhkaa3INDyXo3X4HhHvL7zWrh+ST3SgE81Z88DGEEbUSe0yCa84 cVcbg68FG/VFUb2JOf2W7doOMvpmtVuO+QDdunO/7QAoHnqgy3cXgWSpUlUgNtapzUX0 EL1Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature:arc-authentication-results; bh=p1dT/bzscdZuc8cFz+1XZ1AKc5yvTh+Ysm8sQadR/rg=; b=OBnWHsR3mTZscTBrmXIH9XLYa0UmbtLLZhjUtyMcni0kRlpG2660bdjs/YHDRfGlVZ /9DOlroEgmwQGmapcd2Dltw7j9zmti51lLQVYxjn28t38Ixg6dujFvH4mAy+Oa1oF342 T3Ub0SnwRxF01BmQCeaa0TzOGE0fR4SNO7lXKG/vQzuM2/Z2B7sElDqdMQKgjRlAnlcc Vyif4MZ2a2NK2rHMAK7hMaxv8u69UEdyKkXO/co1KSwcQm+b8rV8rZPbHEsRqXeVrnNt bouysnqOIOajGHY8OQDC41O28aLkPxUhEGR27z7x5/sJvIRNrCjkH28MioOhpzkEmAWe ax0w== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b=AoGyG8Ct; spf=pass (google.com: domain of thgarnie@google.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=thgarnie@google.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b=AoGyG8Ct; spf=pass (google.com: domain of thgarnie@google.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=thgarnie@google.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com X-Google-Smtp-Source: AG47ELtZYVW1WxSD+KZXpGD5xD2RMVULM9KT/XC4AIX9AomTwtEg1EVLAztxAnHaK1hQ3BBeHtzNgw== From: Thomas Garnier To: Herbert Xu , "David S . Miller" , Thomas Gleixner , Ingo Molnar , "H . Peter Anvin" , Peter Zijlstra , Josh Poimboeuf , Greg Kroah-Hartman , Kate Stewart , Thomas Garnier , Arnd Bergmann , Philippe Ombredanne , Arnaldo Carvalho de Melo , Andrey Ryabinin , Matthias Kaehlcke , Kees Cook , Tom Lendacky , "Kirill A . Shutemov" , Andy Lutomirski , Dominik Brodowski , Borislav Petkov , Borislav Petkov , "Rafael J . Wysocki" , Len Brown , Pavel Machek , Juergen Gross , Alok Kataria , Steven Rostedt , Tejun Heo , Christoph Lameter , Dennis Zhou , Boris Ostrovsky , David Woodhouse , Alexey Dobriyan , "Paul E . McKenney" , Andrew Morton , Nicolas Pitre , Randy Dunlap , "Luis R . Rodriguez" , Christopher Li , Jason Baron , Ashish Kalra , Kyle McMartin , Dou Liyang , Lukas Wunner , Petr Mladek , Sergey Senozhatsky , Masahiro Yamada , Ingo Molnar , Nicholas Piggin , Cao jin , "H . J . Lu" , Paolo Bonzini , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Joerg Roedel , Dave Hansen , Rik van Riel , Jia Zhang , Jiri Slaby , Kyle Huey , Jonathan Corbet , Matthew Wilcox , Michal Hocko , Rob Landley , Baoquan He , Daniel Micay , =?UTF-8?q?Jan=20H=20=2E=20Sch=C3=B6nherr?= Cc: x86@kernel.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, virtualization@lists.linux-foundation.org, xen-devel@lists.xenproject.org, linux-arch@vger.kernel.org, linux-sparse@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, kernel-hardening@lists.openwall.com Subject: [PATCH v2 11/27] x86/power/64: Adapt assembly for PIE support Date: Tue, 13 Mar 2018 13:59:29 -0700 Message-Id: <20180313205945.245105-12-thgarnie@google.com> X-Mailer: git-send-email 2.16.2.660.g709887971b-goog In-Reply-To: <20180313205945.245105-1-thgarnie@google.com> References: <20180313205945.245105-1-thgarnie@google.com> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1594857711918861539?= X-GMAIL-MSGID: =?utf-8?q?1594857711918861539?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: Change the assembly code to use only relative references of symbols for the kernel to be PIE compatible. Position Independent Executable (PIE) support will allow to extended the KASLR randomization range below the -2G memory limit. Signed-off-by: Thomas Garnier --- 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 ce8da3a0412c..6fdd7bbc3c33 100644 --- a/arch/x86/power/hibernate_asm_64.S +++ b/arch/x86/power/hibernate_asm_64.S @@ -24,7 +24,7 @@ #include ENTRY(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) @@ -115,7 +115,7 @@ ENTRY(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 -- 2.16.2.660.g709887971b-goog