| 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
| ||
|
Date: Mon, 1 Mar 2010 19:55:46 +0100 From: Luca Barbieri <luca@...a-barbieri.com> To: hpa@...or.com Cc: mingo@...e.hu, a.p.zijlstra@...llo.nl, paulus@...ba.org, linux-kernel@...r.kernel.org, Luca Barbieri <luca@...a-barbieri.com> Subject: [PATCH 2/5] x86-32: fix atomic64_add_unless return value convention atomic64_add_unless must return 1 if it perfomed the add and 0 otherwise. The implementation did the opposite thing. Reported-by: H. Peter Anvin <hpa@...or.com> Signed-off-by: Luca Barbieri <luca@...a-barbieri.com> --- arch/x86/lib/atomic64_386_32.S | 4 ++-- arch/x86/lib/atomic64_cx8_32.S | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/x86/lib/atomic64_386_32.S b/arch/x86/lib/atomic64_386_32.S index 5db07fe..a2f847c 100644 --- a/arch/x86/lib/atomic64_386_32.S +++ b/arch/x86/lib/atomic64_386_32.S @@ -133,13 +133,13 @@ BEGIN add_unless %ecx 1: movl %eax, ($v) movl %edx, 4($v) - xorl %eax, %eax + movl $1, %eax 2: RETURN 3: cmpl %edx, %edi jne 1b - movl $1, %eax + xorl %eax, %eax jmp 2b END_ diff --git a/arch/x86/lib/atomic64_cx8_32.S b/arch/x86/lib/atomic64_cx8_32.S index e49c4eb..d0e37b1 100644 --- a/arch/x86/lib/atomic64_cx8_32.S +++ b/arch/x86/lib/atomic64_cx8_32.S @@ -180,7 +180,7 @@ ENTRY(atomic64_add_unless_cx8) cmpxchg8b (%ebp) jne 1b - xorl %eax, %eax + movl $1, %eax 3: addl $8, %esp CFI_ADJUST_CFA_OFFSET -8 @@ -190,7 +190,7 @@ ENTRY(atomic64_add_unless_cx8) 4: cmpl %edx, 4(%esp) jne 2b - movl $1, %eax + xorl %eax, %eax jmp 3b CFI_ENDPROC ENDPROC(atomic64_add_unless_cx8) -- 1.6.6.1.476.g01ddb -- 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