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Groups > linux.kernel > #1268656
| From | Jessica Yu <jeyu@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: elf: add livepatch-specific elf constants |
| Date | 2015-11-13 08:00 +0100 |
| Message-ID | <quguZ-2Yu-3@gated-at.bofh.it> (permalink) |
| References | <qt92x-kt-1@gated-at.bofh.it> <qt92y-kt-17@gated-at.bofh.it> <qu2im-2in-11@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
+++ Josh Poimboeuf [12/11/15 09:45 -0600]:
>On Mon, Nov 09, 2015 at 11:45:51PM -0500, Jessica Yu wrote:
>> Add livepatch elf reloc section flag, livepatch symbol bind
>> and section index
>>
>> Signed-off-by: Jessica Yu <jeyu@redhat.com>
>> ---
>> include/uapi/linux/elf.h | 3 +++
>> 1 file changed, 3 insertions(+)
>>
>> diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
>> index 71e1d0e..967ce1b 100644
>> --- a/include/uapi/linux/elf.h
>> +++ b/include/uapi/linux/elf.h
>> @@ -118,6 +118,7 @@ typedef __s64 Elf64_Sxword;
>> #define STB_LOCAL 0
>> #define STB_GLOBAL 1
>> #define STB_WEAK 2
>> +#define STB_LIVEPATCH_EXT 11
>>
>> #define STT_NOTYPE 0
>> #define STT_OBJECT 1
>> @@ -286,6 +287,7 @@ typedef struct elf64_phdr {
>> #define SHF_ALLOC 0x2
>> #define SHF_EXECINSTR 0x4
>> #define SHF_MASKPROC 0xf0000000
>> +#define SHF_RELA_LIVEPATCH 0x4000000
>
>Writing the value with leading zeros (0x04000000) would it more
>readable.
>
>Also the OS-specific range mask (SHF_MASKOS) is 0x0ff00000. Any reason
>you went with 0x04000000 as opposed to the first value in the range
>(0x00100000)? I don't see anybody else using that value.
I don't have any particular reason, I think I just picked any value
and ran with it. I'll just change it to the first value in the range
since that makes more sense.
>> /* special section indexes */
>> #define SHN_UNDEF 0
>> @@ -295,6 +297,7 @@ typedef struct elf64_phdr {
>> #define SHN_ABS 0xfff1
>> #define SHN_COMMON 0xfff2
>> #define SHN_HIRESERVE 0xffff
>> +#define SHN_LIVEPATCH 0xff21
>
>Similar question here, why not use 0xff20 (SHN_LOOS)?
>
>--
>Josh
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[RFC PATCH 0/5] Arch-independent livepatch Jessica Yu <jeyu@redhat.com> - 2015-11-10 05:50 +0100
[RFC PATCH 2/5] module: save load_info for livepatch modules Jessica Yu <jeyu@redhat.com> - 2015-11-10 05:50 +0100
Re: [RFC PATCH 2/5] module: save load_info for livepatch modules Minfei Huang <mnfhuang@gmail.com> - 2015-11-11 09:10 +0100
Re: [RFC PATCH 2/5] module: save load_info for livepatch modules Miroslav Benes <mbenes@suse.cz> - 2015-11-11 15:20 +0100
Re: module: save load_info for livepatch modules Jessica Yu <jeyu@redhat.com> - 2015-11-12 06:40 +0100
Re: module: save load_info for livepatch modules Petr Mladek <pmladek@suse.com> - 2015-11-12 11:30 +0100
Re: module: save load_info for livepatch modules Miroslav Benes <mbenes@suse.cz> - 2015-11-12 14:30 +0100
Re: module: save load_info for livepatch modules Petr Mladek <pmladek@suse.com> - 2015-11-12 16:10 +0100
Re: module: save load_info for livepatch modules Josh Poimboeuf <jpoimboe@redhat.com> - 2015-11-12 18:10 +0100
Re: module: save load_info for livepatch modules Jessica Yu <jeyu@redhat.com> - 2015-11-12 23:20 +0100
Re: module: save load_info for livepatch modules Miroslav Benes <mbenes@suse.cz> - 2015-11-13 13:30 +0100
Re: module: save load_info for livepatch modules Miroslav Benes <mbenes@suse.cz> - 2015-11-13 13:50 +0100
Re: module: save load_info for livepatch modules Jessica Yu <jeyu@redhat.com> - 2015-11-14 01:40 +0100
Re: module: save load_info for livepatch modules Miroslav Benes <mbenes@suse.cz> - 2015-11-13 14:00 +0100
Re: module: save load_info for livepatch modules Jessica Yu <jeyu@redhat.com> - 2015-11-14 03:20 +0100
Re: module: save load_info for livepatch modules Jessica Yu <jeyu@redhat.com> - 2015-11-13 01:30 +0100
Re: [RFC PATCH 2/5] module: save load_info for livepatch modules Petr Mladek <pmladek@suse.com> - 2015-11-11 15:40 +0100
Re: module: save load_info for livepatch modules Jessica Yu <jeyu@redhat.com> - 2015-11-12 05:50 +0100
Re: module: save load_info for livepatch modules Petr Mladek <pmladek@suse.com> - 2015-11-12 11:10 +0100
Re: module: save load_info for livepatch modules Miroslav Benes <mbenes@suse.cz> - 2015-11-12 15:20 +0100
Re: module: save load_info for livepatch modules Jessica Yu <jeyu@redhat.com> - 2015-11-13 07:40 +0100
Re: module: save load_info for livepatch modules Miroslav Benes <mbenes@suse.cz> - 2015-11-13 14:10 +0100
Re: module: save load_info for livepatch modules Jessica Yu <jeyu@redhat.com> - 2015-11-13 09:30 +0100
Re: [RFC PATCH 2/5] module: save load_info for livepatch modules Josh Poimboeuf <jpoimboe@redhat.com> - 2015-11-12 18:20 +0100
Re: [RFC PATCH 2/5] module: save load_info for livepatch modules Josh Poimboeuf <jpoimboe@redhat.com> - 2015-11-12 18:30 +0100
[RFC PATCH 1/5] elf: add livepatch-specific elf constants Jessica Yu <jeyu@redhat.com> - 2015-11-10 05:50 +0100
Re: [RFC PATCH 1/5] elf: add livepatch-specific elf constants Petr Mladek <pmladek@suse.com> - 2015-11-11 15:00 +0100
Re: [RFC PATCH 1/5] elf: add livepatch-specific elf constants Josh Poimboeuf <jpoimboe@redhat.com> - 2015-11-12 16:40 +0100
Re: [RFC PATCH 1/5] elf: add livepatch-specific elf constants Josh Poimboeuf <jpoimboe@redhat.com> - 2015-11-12 16:50 +0100
Re: elf: add livepatch-specific elf constants Jessica Yu <jeyu@redhat.com> - 2015-11-13 08:00 +0100
[RFC PATCH 4/5] samples: livepatch: init reloc list and mark as klp module Jessica Yu <jeyu@redhat.com> - 2015-11-10 05:50 +0100
Re: [RFC PATCH 4/5] samples: livepatch: init reloc list and mark as klp module Jiri Slaby <jslaby@suse.cz> - 2015-11-10 09:20 +0100
Re: [RFC PATCH 4/5] samples: livepatch: init reloc list and mark as klp module Josh Poimboeuf <jpoimboe@redhat.com> - 2015-11-10 15:00 +0100
Re: samples: livepatch: init reloc list and mark as klp module Jessica Yu <jeyu@redhat.com> - 2015-11-10 19:40 +0100
Re: [RFC PATCH 4/5] samples: livepatch: init reloc list and mark as klp module Petr Mladek <pmladek@suse.com> - 2015-11-11 16:50 +0100
Re: samples: livepatch: init reloc list and mark as klp module Jessica Yu <jeyu@redhat.com> - 2015-11-12 07:10 +0100
Re: samples: livepatch: init reloc list and mark as klp module Miroslav Benes <mbenes@suse.cz> - 2015-11-12 11:50 +0100
[RFC PATCH 5/5] livepatch: x86: remove unused relocation code Jessica Yu <jeyu@redhat.com> - 2015-11-10 05:50 +0100
Re: [RFC PATCH 5/5] livepatch: x86: remove unused relocation code Petr Mladek <pmladek@suse.com> - 2015-11-11 16:50 +0100
Re: [RFC PATCH 5/5] livepatch: x86: remove unused relocation code Josh Poimboeuf <jpoimboe@redhat.com> - 2015-11-12 19:10 +0100
[RFC PATCH 3/5] livepatch: reuse module loader code to write relocations Jessica Yu <jeyu@redhat.com> - 2015-11-10 05:50 +0100
Re: [RFC PATCH 3/5] livepatch: reuse module loader code to write relocations Jiri Slaby <jslaby@suse.cz> - 2015-11-10 09:20 +0100
Re: [RFC PATCH 3/5] livepatch: reuse module loader code to write relocations Miroslav Benes <mbenes@suse.cz> - 2015-11-11 15:40 +0100
Re: livepatch: reuse module loader code to write relocations Jessica Yu <jeyu@redhat.com> - 2015-11-11 21:10 +0100
Re: livepatch: reuse module loader code to write relocations Miroslav Benes <mbenes@suse.cz> - 2015-11-12 16:30 +0100
Re: livepatch: reuse module loader code to write relocations Josh Poimboeuf <jpoimboe@redhat.com> - 2015-11-12 18:50 +0100
Re: livepatch: reuse module loader code to write relocations Jessica Yu <jeyu@redhat.com> - 2015-11-12 21:30 +0100
Re: livepatch: reuse module loader code to write relocations Josh Poimboeuf <jpoimboe@redhat.com> - 2015-11-12 21:40 +0100
Re: livepatch: reuse module loader code to write relocations Jessica Yu <jeyu@redhat.com> - 2015-11-13 08:20 +0100
Re: livepatch: reuse module loader code to write relocations Miroslav Benes <mbenes@suse.cz> - 2015-11-13 15:00 +0100
Re: livepatch: reuse module loader code to write relocations Jessica Yu <jeyu@redhat.com> - 2015-11-12 20:20 +0100
Re: livepatch: reuse module loader code to write relocations Jessica Yu <jeyu@redhat.com> - 2015-11-12 21:40 +0100
Re: [RFC PATCH 3/5] livepatch: reuse module loader code to write relocations Petr Mladek <pmladek@suse.com> - 2015-11-11 16:30 +0100
Re: livepatch: reuse module loader code to write relocations Jessica Yu <jeyu@redhat.com> - 2015-11-11 19:30 +0100
Re: livepatch: reuse module loader code to write relocations Petr Mladek <pmladek@suse.com> - 2015-11-12 10:20 +0100
Re: [RFC PATCH 3/5] livepatch: reuse module loader code to write relocations Josh Poimboeuf <jpoimboe@redhat.com> - 2015-11-12 19:00 +0100
Re: [RFC PATCH 0/5] Arch-independent livepatch Miroslav Benes <mbenes@suse.cz> - 2015-11-11 15:10 +0100
Re: [RFC PATCH 0/5] Arch-independent livepatch Josh Poimboeuf <jpoimboe@redhat.com> - 2015-11-11 17:30 +0100
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