linux-kernel - [PATCH v2 05/10] x86: kernel+lib, annotate local functions

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]

Message-Id: <20170320123222.15453-5-jslaby@suse.cz>
Date:   Mon, 20 Mar 2017 13:32:17 +0100
From:   Jiri Slaby <jslaby@...e.cz>
To:     mingo@...hat.com
Cc:     tglx@...utronix.de, hpa@...or.com, x86@...nel.org,
        jpoimboe@...hat.com, linux-kernel@...r.kernel.org,
        Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH v2 05/10] x86: kernel+lib, annotate local functions

Use the newly added SYM_FUNC_START_LOCAL to annotate starts of all
functions which do not have ".globl" annotation. This is needed to
balance SYM_FUNC_END for tools that are about to generate debuginfo.

In this patch, do it for local verify_cpu, early_idt_handler_common, and
bad_*_user properly.  Note that early_idt_handler_common already had
ENDPROC -- switch to the new SYM_FUNC_END.

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/head_64.S    | 4 ++--
 arch/x86/kernel/verify_cpu.S | 3 ++-
 arch/x86/lib/getuser.S       | 8 ++++----
 arch/x86/lib/putuser.S       | 4 ++--
 4 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index e093a804f1fb..90616ba150eb 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -355,7 +355,7 @@ ENTRY(early_idt_handler_array)
 	.endr
 ENDPROC(early_idt_handler_array)
 
-early_idt_handler_common:
+SYM_FUNC_START_LOCAL(early_idt_handler_common)
 	/*
 	 * The stack is the hardware frame, an error code or zero, and the
 	 * vector number.
@@ -396,7 +396,7 @@ early_idt_handler_common:
 20:
 	decl early_recursion_flag(%rip)
 	jmp restore_regs_and_iret
-ENDPROC(early_idt_handler_common)
+SYM_FUNC_END(early_idt_handler_common)
 
 	__INITDATA
 
diff --git a/arch/x86/kernel/verify_cpu.S b/arch/x86/kernel/verify_cpu.S
index 014ea59aa153..fd60f1ac5fec 100644
--- a/arch/x86/kernel/verify_cpu.S
+++ b/arch/x86/kernel/verify_cpu.S
@@ -33,7 +33,7 @@
 #include <asm/cpufeatures.h>
 #include <asm/msr-index.h>
 
-verify_cpu:
+SYM_FUNC_START_LOCAL(verify_cpu)
 	pushf				# Save caller passed flags
 	push	$0			# Kill any dangerous flags
 	popf
@@ -139,3 +139,4 @@ verify_cpu:
 	popf				# Restore caller passed flags
 	xorl %eax, %eax
 	ret
+SYM_FUNC_END(verify_cpu)
diff --git a/arch/x86/lib/getuser.S b/arch/x86/lib/getuser.S
index 37b62d412148..29f0707a3913 100644
--- a/arch/x86/lib/getuser.S
+++ b/arch/x86/lib/getuser.S
@@ -104,21 +104,21 @@ ENDPROC(__get_user_8)
 EXPORT_SYMBOL(__get_user_8)
 
 
-bad_get_user:
+SYM_FUNC_START_LOCAL(bad_get_user)
 	xor %edx,%edx
 	mov $(-EFAULT),%_ASM_AX
 	ASM_CLAC
 	ret
-END(bad_get_user)
+SYM_FUNC_END(bad_get_user)
 
 #ifdef CONFIG_X86_32
-bad_get_user_8:
+SYM_FUNC_START_LOCAL(bad_get_user_8)
 	xor %edx,%edx
 	xor %ecx,%ecx
 	mov $(-EFAULT),%_ASM_AX
 	ASM_CLAC
 	ret
-END(bad_get_user_8)
+SYM_FUNC_END(bad_get_user_8)
 #endif
 
 	_ASM_EXTABLE(1b,bad_get_user)
diff --git a/arch/x86/lib/putuser.S b/arch/x86/lib/putuser.S
index cd5d716d2897..d77883f36875 100644
--- a/arch/x86/lib/putuser.S
+++ b/arch/x86/lib/putuser.S
@@ -88,10 +88,10 @@ ENTRY(__put_user_8)
 ENDPROC(__put_user_8)
 EXPORT_SYMBOL(__put_user_8)
 
-bad_put_user:
+SYM_FUNC_START_LOCAL(bad_put_user)
 	movl $-EFAULT,%eax
 	EXIT
-END(bad_put_user)
+SYM_FUNC_END(bad_put_user)
 
 	_ASM_EXTABLE(1b,bad_put_user)
 	_ASM_EXTABLE(2b,bad_put_user)
-- 
2.12.0