diff mbox

[RFC] arm64: Switch to %px for printing some addresses at bootup

Message ID 20171214223914.12532-1-labbott@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Laura Abbott Dec. 14, 2017, 10:39 p.m. UTC
With the move to stricter %p printing, several of the addresses
are no longer printed out. Switch to %px so they always get printed.

Signed-off-by: Laura Abbott <labbott@redhat.com>
---
I'll admit to finding the new %p restrictions particularly irritating
here because I like seeing the print out of the virtual addresses for
debugging and checking. It might also be worth discussing whether we
should be printing anything out?
---
 arch/arm64/mm/init.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

Comments

Kees Cook Dec. 14, 2017, 10:51 p.m. UTC | #1
On Thu, Dec 14, 2017 at 2:39 PM, Laura Abbott <labbott@redhat.com> wrote:
> With the move to stricter %p printing, several of the addresses
> are no longer printed out. Switch to %px so they always get printed.
>
> Signed-off-by: Laura Abbott <labbott@redhat.com>
> ---
> I'll admit to finding the new %p restrictions particularly irritating
> here because I like seeing the print out of the virtual addresses for
> debugging and checking. It might also be worth discussing whether we
> should be printing anything out?

If they're always printed at boot, I think they should likely be removed...

-Kees

> ---
>  arch/arm64/mm/init.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
> index 5960bef0170d..9be53e050f50 100644
> --- a/arch/arm64/mm/init.c
> +++ b/arch/arm64/mm/init.c
> @@ -613,15 +613,15 @@ void __init mem_init(void)
>                 MLM(MODULES_VADDR, MODULES_END));
>         pr_notice("    vmalloc : 0x%16lx - 0x%16lx   (%6ld GB)\n",
>                 MLG(VMALLOC_START, VMALLOC_END));
> -       pr_notice("      .text : 0x%p" " - 0x%p" "   (%6ld KB)\n",
> +       pr_notice("      .text : 0x%px" " - 0x%px" "   (%6ld KB)\n",
>                 MLK_ROUNDUP(_text, _etext));
> -       pr_notice("    .rodata : 0x%p" " - 0x%p" "   (%6ld KB)\n",
> +       pr_notice("    .rodata : 0x%px" " - 0x%px" "   (%6ld KB)\n",
>                 MLK_ROUNDUP(__start_rodata, __init_begin));
> -       pr_notice("      .init : 0x%p" " - 0x%p" "   (%6ld KB)\n",
> +       pr_notice("      .init : 0x%px" " - 0x%px" "   (%6ld KB)\n",
>                 MLK_ROUNDUP(__init_begin, __init_end));
> -       pr_notice("      .data : 0x%p" " - 0x%p" "   (%6ld KB)\n",
> +       pr_notice("      .data : 0x%px" " - 0x%px" "   (%6ld KB)\n",
>                 MLK_ROUNDUP(_sdata, _edata));
> -       pr_notice("       .bss : 0x%p" " - 0x%p" "   (%6ld KB)\n",
> +       pr_notice("       .bss : 0x%px" " - 0x%px" "   (%6ld KB)\n",
>                 MLK_ROUNDUP(__bss_start, __bss_stop));
>         pr_notice("    fixed   : 0x%16lx - 0x%16lx   (%6ld KB)\n",
>                 MLK(FIXADDR_START, FIXADDR_TOP));
> --
> 2.14.3
>
Laura Abbott Dec. 14, 2017, 11:30 p.m. UTC | #2
On 12/14/2017 02:51 PM, Kees Cook wrote:
> On Thu, Dec 14, 2017 at 2:39 PM, Laura Abbott <labbott@redhat.com> wrote:
>> With the move to stricter %p printing, several of the addresses
>> are no longer printed out. Switch to %px so they always get printed.
>>
>> Signed-off-by: Laura Abbott <labbott@redhat.com>
>> ---
>> I'll admit to finding the new %p restrictions particularly irritating
>> here because I like seeing the print out of the virtual addresses for
>> debugging and checking. It might also be worth discussing whether we
>> should be printing anything out?
> 
> If they're always printed at boot, I think they should likely be removed...
> 
> -Kees
> 

Yeah, I suspected as much. I'll submit a patch to just remove it
unless someone has a counter proposal.

Thanks,
Laura

>> ---
>>   arch/arm64/mm/init.c | 10 +++++-----
>>   1 file changed, 5 insertions(+), 5 deletions(-)
>>
>> diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
>> index 5960bef0170d..9be53e050f50 100644
>> --- a/arch/arm64/mm/init.c
>> +++ b/arch/arm64/mm/init.c
>> @@ -613,15 +613,15 @@ void __init mem_init(void)
>>                  MLM(MODULES_VADDR, MODULES_END));
>>          pr_notice("    vmalloc : 0x%16lx - 0x%16lx   (%6ld GB)\n",
>>                  MLG(VMALLOC_START, VMALLOC_END));
>> -       pr_notice("      .text : 0x%p" " - 0x%p" "   (%6ld KB)\n",
>> +       pr_notice("      .text : 0x%px" " - 0x%px" "   (%6ld KB)\n",
>>                  MLK_ROUNDUP(_text, _etext));
>> -       pr_notice("    .rodata : 0x%p" " - 0x%p" "   (%6ld KB)\n",
>> +       pr_notice("    .rodata : 0x%px" " - 0x%px" "   (%6ld KB)\n",
>>                  MLK_ROUNDUP(__start_rodata, __init_begin));
>> -       pr_notice("      .init : 0x%p" " - 0x%p" "   (%6ld KB)\n",
>> +       pr_notice("      .init : 0x%px" " - 0x%px" "   (%6ld KB)\n",
>>                  MLK_ROUNDUP(__init_begin, __init_end));
>> -       pr_notice("      .data : 0x%p" " - 0x%p" "   (%6ld KB)\n",
>> +       pr_notice("      .data : 0x%px" " - 0x%px" "   (%6ld KB)\n",
>>                  MLK_ROUNDUP(_sdata, _edata));
>> -       pr_notice("       .bss : 0x%p" " - 0x%p" "   (%6ld KB)\n",
>> +       pr_notice("       .bss : 0x%px" " - 0x%px" "   (%6ld KB)\n",
>>                  MLK_ROUNDUP(__bss_start, __bss_stop));
>>          pr_notice("    fixed   : 0x%16lx - 0x%16lx   (%6ld KB)\n",
>>                  MLK(FIXADDR_START, FIXADDR_TOP));
>> --
>> 2.14.3
>>
> 
> 
>
diff mbox

Patch

diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 5960bef0170d..9be53e050f50 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -613,15 +613,15 @@  void __init mem_init(void)
 		MLM(MODULES_VADDR, MODULES_END));
 	pr_notice("    vmalloc : 0x%16lx - 0x%16lx   (%6ld GB)\n",
 		MLG(VMALLOC_START, VMALLOC_END));
-	pr_notice("      .text : 0x%p" " - 0x%p" "   (%6ld KB)\n",
+	pr_notice("      .text : 0x%px" " - 0x%px" "   (%6ld KB)\n",
 		MLK_ROUNDUP(_text, _etext));
-	pr_notice("    .rodata : 0x%p" " - 0x%p" "   (%6ld KB)\n",
+	pr_notice("    .rodata : 0x%px" " - 0x%px" "   (%6ld KB)\n",
 		MLK_ROUNDUP(__start_rodata, __init_begin));
-	pr_notice("      .init : 0x%p" " - 0x%p" "   (%6ld KB)\n",
+	pr_notice("      .init : 0x%px" " - 0x%px" "   (%6ld KB)\n",
 		MLK_ROUNDUP(__init_begin, __init_end));
-	pr_notice("      .data : 0x%p" " - 0x%p" "   (%6ld KB)\n",
+	pr_notice("      .data : 0x%px" " - 0x%px" "   (%6ld KB)\n",
 		MLK_ROUNDUP(_sdata, _edata));
-	pr_notice("       .bss : 0x%p" " - 0x%p" "   (%6ld KB)\n",
+	pr_notice("       .bss : 0x%px" " - 0x%px" "   (%6ld KB)\n",
 		MLK_ROUNDUP(__bss_start, __bss_stop));
 	pr_notice("    fixed   : 0x%16lx - 0x%16lx   (%6ld KB)\n",
 		MLK(FIXADDR_START, FIXADDR_TOP));