linux-kernel - [PATCH v4 27/27] x86: assembly, replace WEAK uses

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon,  2 Oct 2017 11:12:46 +0200
From:   Jiri Slaby <jslaby@...e.cz>
To:     mingo@...hat.com
Cc:     tglx@...utronix.de, hpa@...or.com, x86@...nel.org,
        linux-kernel@...r.kernel.org, Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH v4 27/27] x86: assembly, replace WEAK uses

Use the new SYM_CODE_INNER_LABEL_NOALIGN for WEAK entries in the middle
of x86 assembly functions.

And make sure WEAK is not defined for x86 anymore as these were the last
users.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: x86@...nel.org
---
 arch/x86/kernel/ftrace_32.S | 2 +-
 arch/x86/kernel/ftrace_64.S | 2 +-
 arch/x86/kernel/head_32.S   | 2 +-
 include/linux/linkage.h     | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/ftrace_32.S b/arch/x86/kernel/ftrace_32.S
index efe209b292f8..0001d5b847d5 100644
--- a/arch/x86/kernel/ftrace_32.S
+++ b/arch/x86/kernel/ftrace_32.S
@@ -96,7 +96,7 @@ ftrace_graph_call:
 #endif
 
 /* This is weak to keep gas from relaxing the jumps */
-WEAK(ftrace_stub)
+SYM_CODE_INNER_LABEL_NOALIGN(ftrace_stub, SYM_V_WEAK)
 	ret
 SYM_CODE_END(ftrace_caller)
 
diff --git a/arch/x86/kernel/ftrace_64.S b/arch/x86/kernel/ftrace_64.S
index 3e20eb31cca6..2172263df27a 100644
--- a/arch/x86/kernel/ftrace_64.S
+++ b/arch/x86/kernel/ftrace_64.S
@@ -181,7 +181,7 @@ SYM_CODE_INNER_LABEL_NOALIGN(ftrace_graph_call, SYM_V_GLOBAL)
 #endif
 
 /* This is weak to keep gas from relaxing the jumps */
-WEAK(ftrace_stub)
+SYM_CODE_INNER_LABEL_NOALIGN(ftrace_stub, SYM_V_WEAK)
 	retq
 SYM_CODE_END(ftrace_caller)
 
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index 1a51d2a61495..9a16a82bafda 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -155,7 +155,7 @@ SYM_CODE_START(startup_32)
 	jmp *%eax
 
 .Lbad_subarch:
-WEAK(xen_entry)
+SYM_CODE_INNER_LABEL_NOALIGN(xen_entry, SYM_V_WEAK)
 	/* Unknown implementation; there's really
 	   nothing we can do at this point. */
 	ud2a
diff --git a/include/linux/linkage.h b/include/linux/linkage.h
index a88f332136b4..79e4f8240a3a 100644
--- a/include/linux/linkage.h
+++ b/include/linux/linkage.h
@@ -113,13 +113,13 @@
 #endif /* CONFIG_X86 */
 #endif /* LINKER_SCRIPT */
 
+#ifndef CONFIG_X86
 #ifndef WEAK
 /* deprecated, use SYM_FUNC_START_WEAK* */
 #define WEAK(name)	   \
 	SYM_FUNC_START_WEAK_NOALIGN(name)
 #endif
 
-#ifndef CONFIG_X86
 #ifndef END
 /* deprecated, use SYM_FUNC_END, SYM_DATA_END, or SYM_END */
 #define END(name) \
-- 
2.14.2