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  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date:	Sat, 4 Jan 2014 14:04:19 -0800
From:	tip-bot for David Woodhouse <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	dwmw2@...radead.org, tglx@...utronix.de, hpa@...ux.intel.com,
	David.Woodhouse@...el.com
Subject: [tip:x86/build] x86, boot: Use .code16 instead of .code16gcc

Commit-ID:  e24df921af484e9b7095ee06d236dabdb3bd9c1c
Gitweb:     http://git.kernel.org/tip/e24df921af484e9b7095ee06d236dabdb3bd9c1c
Author:     David Woodhouse <dwmw2@...radead.org>
AuthorDate: Fri, 3 Jan 2014 22:30:42 +0000
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Sat, 4 Jan 2014 13:59:06 -0800

x86, boot: Use .code16 instead of .code16gcc

This reverts commit 28b48688 ("x86, boot: use .code16gcc instead
of .code16").

Versions of binutils older than 2.16 are already not working, so this
workaround is no longer necessary either.  At the same time, some of
the transformations that .code16gcc does can be *extremely*
counterintuitive to a human programmer.

[ hpa: folded ret -> retl and call -> calll fixes from followup patch ]

Signed-off-by: David Woodhouse <David.Woodhouse@...el.com>
Link: http://lkml.kernel.org/r/1388788242.2391.75.camel@shinybook.infradead.org
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/boot/bioscall.S |  2 +-
 arch/x86/boot/copy.S     | 22 +++++++++++-----------
 2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/arch/x86/boot/bioscall.S b/arch/x86/boot/bioscall.S
index 1dfbf64..5077937 100644
--- a/arch/x86/boot/bioscall.S
+++ b/arch/x86/boot/bioscall.S
@@ -13,7 +13,7 @@
  * touching registers they shouldn't be.
  */
 
-	.code16gcc
+	.code16
 	.text
 	.globl	intcall
 	.type	intcall, @function
diff --git a/arch/x86/boot/copy.S b/arch/x86/boot/copy.S
index 11f272c..1eb7d29 100644
--- a/arch/x86/boot/copy.S
+++ b/arch/x86/boot/copy.S
@@ -14,7 +14,7 @@
  * Memory copy routines
  */
 
-	.code16gcc
+	.code16
 	.text
 
 GLOBAL(memcpy)
@@ -30,7 +30,7 @@ GLOBAL(memcpy)
 	rep; movsb
 	popw	%di
 	popw	%si
-	ret
+	retl
 ENDPROC(memcpy)
 
 GLOBAL(memset)
@@ -45,25 +45,25 @@ GLOBAL(memset)
 	andw	$3, %cx
 	rep; stosb
 	popw	%di
-	ret
+	retl
 ENDPROC(memset)
 
 GLOBAL(copy_from_fs)
 	pushw	%ds
 	pushw	%fs
 	popw	%ds
-	call	memcpy
+	calll	memcpy
 	popw	%ds
-	ret
+	retl
 ENDPROC(copy_from_fs)
 
 GLOBAL(copy_to_fs)
 	pushw	%es
 	pushw	%fs
 	popw	%es
-	call	memcpy
+	calll	memcpy
 	popw	%es
-	ret
+	retl
 ENDPROC(copy_to_fs)
 
 #if 0 /* Not currently used, but can be enabled as needed */
@@ -71,17 +71,17 @@ GLOBAL(copy_from_gs)
 	pushw	%ds
 	pushw	%gs
 	popw	%ds
-	call	memcpy
+	calll	memcpy
 	popw	%ds
-	ret
+	retl
 ENDPROC(copy_from_gs)
 
 GLOBAL(copy_to_gs)
 	pushw	%es
 	pushw	%gs
 	popw	%es
-	call	memcpy
+	calll	memcpy
 	popw	%es
-	ret
+	retl
 ENDPROC(copy_to_gs)
 #endif
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists