linux-kernel - [PATCH] x86/tools/relocs: Add _etext and __end_of_kernel_reserve to S

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Message-Id: <20200110202349.1881840-1-nivedita@alum.mit.edu>
Date:   Fri, 10 Jan 2020 15:23:49 -0500
From:   Arvind Sankar <nivedita@...m.mit.edu>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        Kees Cook <keescook@...omium.org>,
        Thomas Lendacky <Thomas.Lendacky@....com>
Subject: [PATCH] x86/tools/relocs: Add _etext and __end_of_kernel_reserve to S_REL

Pre-2.23 binutils makes symbols defined outside sections absolute, so
these two symbols break the build on old linkers.

Fixes: b907693883fd ("x86/vmlinux: Actually use _etext for the end of the text segment")
Fixes: c603a309cc75 ("x86/mm: Identify the end of the kernel area to be reserved")
Signed-off-by: Arvind Sankar <nivedita@...m.mit.edu>
---
 arch/x86/tools/relocs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
index ce7188cbdae5..0a6146d6414f 100644
--- a/arch/x86/tools/relocs.c
+++ b/arch/x86/tools/relocs.c
@@ -78,6 +78,8 @@ static const char * const sym_regex_kernel[S_NSYMTYPES] = {
 	"__end_rodata_hpage_align|"
 #endif
 	"__vvar_page|"
+	"_etext|"
+	"__end_of_kernel_reserve|"
 	"_end)$"
 };
 
-- 
2.24.1