[tip:x86/cleanups] x86_64: Use __BOOT_DS instead_of __KERNEL_DS for safety
Commit-ID: 2dead15fb8f6522b96c913603b5ad0b5c7d01f49 Gitweb: http://git.kernel.org/tip/2dead15fb8f6522b96c913603b5ad0b5c7d01f49 Author: Lans Zhang AuthorDate: Fri, 1 Mar 2013 09:20:39 +0800 Committer: H. Peter Anvin CommitDate: Fri, 1 Mar 2013 10:18:33 -0800 x86_64: Use __BOOT_DS instead_of __KERNEL_DS for safety In startup_32, the running code still uses the initial GDT located in setup. Thus, __BOOT_DS is preferred. Currently __KERNEL_DS is lucky to equal to __BOOT_DS, but this is not always a safe way. Signed-off-by: Lans Zhang Link: http://lkml.kernel.org/r/51300267.6000...@gmail.com Signed-off-by: H. Peter Anvin --- arch/x86/boot/compressed/head_64.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S index c1d383d..16f24e6 100644 --- a/arch/x86/boot/compressed/head_64.S +++ b/arch/x86/boot/compressed/head_64.S @@ -52,7 +52,7 @@ ENTRY(startup_32) jnz 1f cli - movl$(__KERNEL_DS), %eax + movl$(__BOOT_DS), %eax movl%eax, %ds movl%eax, %es movl%eax, %ss -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [tip:x86/cleanups] x86_64: Use __BOOT_DS instead_of __KERNEL_DS for safety
On 03/01/2013 09:47 AM, Yinghai Lu wrote: > On Thu, Feb 28, 2013 at 9:23 PM, tip-bot for gmail wrote: >> Commit-ID: b317219b322e36e25150d7b64f4532401779959d >> Gitweb: >> http://git.kernel.org/tip/b317219b322e36e25150d7b64f4532401779959d >> Author: gmail > > name is messed up. > > should be > > Lans Zhang > Indeed. I'll adjust it. Lans, please fix your mail setup for next time. -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [tip:x86/cleanups] x86_64: Use __BOOT_DS instead_of __KERNEL_DS for safety
On Thu, Feb 28, 2013 at 9:23 PM, tip-bot for gmail wrote: > Commit-ID: b317219b322e36e25150d7b64f4532401779959d > Gitweb: http://git.kernel.org/tip/b317219b322e36e25150d7b64f4532401779959d > Author: gmail name is messed up. should be Lans Zhang > AuthorDate: Fri, 1 Mar 2013 09:20:39 +0800 > Committer: H. Peter Anvin > CommitDate: Thu, 28 Feb 2013 20:19:50 -0800 > > x86_64: Use __BOOT_DS instead_of __KERNEL_DS for safety > > In startup_32, the running code still uses the initial GDT > located in setup. Thus, __BOOT_DS is preferred. Currently > __KERNEL_DS is lucky to equal to __BOOT_DS, but this is > not always a safe way. > > Signed-off-by: Lans Zhang > Link: http://lkml.kernel.org/r/51300267.6000...@gmail.com > Signed-off-by: H. Peter Anvin > --- > arch/x86/boot/compressed/head_64.S | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/x86/boot/compressed/head_64.S > b/arch/x86/boot/compressed/head_64.S > index c1d383d..16f24e6 100644 > --- a/arch/x86/boot/compressed/head_64.S > +++ b/arch/x86/boot/compressed/head_64.S > @@ -52,7 +52,7 @@ ENTRY(startup_32) > jnz 1f > > cli > - movl$(__KERNEL_DS), %eax > + movl$(__BOOT_DS), %eax > movl%eax, %ds > movl%eax, %es > movl%eax, %ss > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[tip:x86/cleanups] x86_64: Use __BOOT_DS instead_of __KERNEL_DS for safety
Commit-ID: b317219b322e36e25150d7b64f4532401779959d Gitweb: http://git.kernel.org/tip/b317219b322e36e25150d7b64f4532401779959d Author: gmail AuthorDate: Fri, 1 Mar 2013 09:20:39 +0800 Committer: H. Peter Anvin CommitDate: Thu, 28 Feb 2013 20:19:50 -0800 x86_64: Use __BOOT_DS instead_of __KERNEL_DS for safety In startup_32, the running code still uses the initial GDT located in setup. Thus, __BOOT_DS is preferred. Currently __KERNEL_DS is lucky to equal to __BOOT_DS, but this is not always a safe way. Signed-off-by: Lans Zhang Link: http://lkml.kernel.org/r/51300267.6000...@gmail.com Signed-off-by: H. Peter Anvin --- arch/x86/boot/compressed/head_64.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S index c1d383d..16f24e6 100644 --- a/arch/x86/boot/compressed/head_64.S +++ b/arch/x86/boot/compressed/head_64.S @@ -52,7 +52,7 @@ ENTRY(startup_32) jnz 1f cli - movl$(__KERNEL_DS), %eax + movl$(__BOOT_DS), %eax movl%eax, %ds movl%eax, %es movl%eax, %ss -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
