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Groups > linux.kernel > #1606408
| From | Jiri Slaby <jslaby@suse.cz> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data |
| Date | 2017-03-22 13:10 +0100 |
| Message-ID | <tnNfs-2bK-17@gated-at.bofh.it> (permalink) |
| References | <tlyNB-3TH-33@gated-at.bofh.it> <tn4Ln-4J7-5@gated-at.bofh.it> <tn4Lp-4J7-47@gated-at.bofh.it> <tnsNI-4r2-11@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
[Multipart message — attachments visible in raw view] - view raw
Hi,
On 03/21/2017, 03:08 PM, Pavel Machek wrote:
>> -ENTRY(saved_rbp) .quad 0
>> -ENTRY(saved_rsi) .quad 0
>> -ENTRY(saved_rdi) .quad 0
>> -ENTRY(saved_rbx) .quad 0
>> +SYM_DATA_START(saved_rbp) .quad 0
>> +SYM_DATA_START(saved_rsi) .quad 0
>> +SYM_DATA_START(saved_rdi) .quad 0
>> +SYM_DATA_START(saved_rbx) .quad 0
>
> Does it make sense to call it SYM_DATA_*START* when there's no
> corresponding end?
>
> Plus... it looks like saved_rsi (and friends) are only used inside
> wakeup_64.S. Could we just delete the "ENTRY" annotations?
So, now I have:
=== linkage.h ===
/* SYM_DATA_SIMPLE -- start+end wrapper around simple global data */
#ifndef SYM_DATA_SIMPLE
#define SYM_DATA_SIMPLE(name, data) \
SYM_DATA_START(name) ASM_NL \
data ASM_NL \
SYM_DATA_END(name)
#endif
/* SYM_DATA_SIMPLE_LOCAL -- start+end wrapper around simple local data */
#ifndef SYM_DATA_SIMPLE_LOCAL
#define SYM_DATA_SIMPLE_LOCAL(name, data) \
SYM_DATA_START_LOCAL(name) ASM_NL \
data ASM_NL \
SYM_DATA_END(name)
#endif
=== wakeup_64.S ===
SYM_DATA_SIMPLE_LOCAL(saved_rbp, .quad 0)
SYM_DATA_SIMPLE_LOCAL(saved_rsi, .quad 0)
SYM_DATA_SIMPLE_LOCAL(saved_rdi, .quad 0)
SYM_DATA_SIMPLE_LOCAL(saved_rbx, .quad 0)
SYM_DATA_SIMPLE_LOCAL(saved_rip, .quad 0)
SYM_DATA_SIMPLE_LOCAL(saved_rsp, .quad 0)
SYM_DATA_SIMPLE_LOCAL(saved_magic, .quad 0)
=== original ===
10: 0000000000000060 0 NOTYPE GLOBAL DEFAULT 3 saved_magic
11: 0000000000000050 0 NOTYPE GLOBAL DEFAULT 3 saved_rsp
12: 0000000000000030 0 NOTYPE GLOBAL DEFAULT 3 saved_rbx
13: 0000000000000020 0 NOTYPE GLOBAL DEFAULT 3 saved_rdi
14: 0000000000000010 0 NOTYPE GLOBAL DEFAULT 3 saved_rsi
15: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 3 saved_rbp
16: 0000000000000040 0 NOTYPE GLOBAL DEFAULT 3 saved_rip
=== new ===
4: 0000000000000030 8 OBJECT LOCAL DEFAULT 3 saved_magic
6: 0000000000000028 8 OBJECT LOCAL DEFAULT 3 saved_rsp
7: 0000000000000018 8 OBJECT LOCAL DEFAULT 3 saved_rbx
8: 0000000000000010 8 OBJECT LOCAL DEFAULT 3 saved_rdi
9: 0000000000000008 8 OBJECT LOCAL DEFAULT 3 saved_rsi
10: 0000000000000000 8 OBJECT LOCAL DEFAULT 3 saved_rbp
11: 0000000000000020 8 OBJECT LOCAL DEFAULT 3 saved_rip
=== EOF ===
BTW, ENTRY() aligned the data to 2^4 = 16 as we can see in the original.
But I see no point aligning data like this.
thanks,
--
js
suse labs
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Re: [RFC] linkage: new macros for functions and data Ingo Molnar <mingo@kernel.org> - 2017-03-16 09:10 +0100
Re: [RFC] linkage: new macros for functions and data Jiri Slaby <jslaby@suse.cz> - 2017-03-16 09:20 +0100
[PATCH v2 07/10] x86: assembly, annotate aliases Jiri Slaby <jslaby@suse.cz> - 2017-03-20 13:40 +0100
[PATCH v2 04/10] x86: boot, annotate functions properly Jiri Slaby <jslaby@suse.cz> - 2017-03-20 13:40 +0100
[PATCH v2 09/10] x86: entry, annotate interrupt symbols properly Jiri Slaby <jslaby@suse.cz> - 2017-03-20 13:40 +0100
[PATCH v2 03/10] x86: assembly, use SYM_FUNC_END for functions Jiri Slaby <jslaby@suse.cz> - 2017-03-20 13:40 +0100
Re: [PATCH v2 03/10] x86: assembly, use SYM_FUNC_END for functions Josh Poimboeuf <jpoimboe@redhat.com> - 2017-03-21 15:50 +0100
Re: [PATCH v2 03/10] x86: assembly, use SYM_FUNC_END for functions Ingo Molnar <mingo@kernel.org> - 2017-03-22 08:40 +0100
Re: [PATCH v2 03/10] x86: assembly, use SYM_FUNC_END for functions Josh Poimboeuf <jpoimboe@redhat.com> - 2017-03-22 15:30 +0100
Re: [PATCH v2 03/10] x86: assembly, use SYM_FUNC_END for functions Jiri Slaby <jslaby@suse.cz> - 2017-03-22 17:00 +0100
[PATCH v2 05/10] x86: kernel+lib, annotate local functions Jiri Slaby <jslaby@suse.cz> - 2017-03-20 13:40 +0100
[PATCH v2 08/10] x86: entry, annotate THUNKs Jiri Slaby <jslaby@suse.cz> - 2017-03-20 13:40 +0100
[PATCH v2 06/10] x86: crypto, annotate local functions Jiri Slaby <jslaby@suse.cz> - 2017-03-20 13:40 +0100
[PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data Jiri Slaby <jslaby@suse.cz> - 2017-03-20 13:40 +0100
Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data Josh Poimboeuf <jpoimboe@redhat.com> - 2017-03-20 14:40 +0100
Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data Jiri Slaby <jslaby@suse.cz> - 2017-03-20 16:50 +0100
Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data Josh Poimboeuf <jpoimboe@redhat.com> - 2017-03-20 17:10 +0100
Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data Pavel Machek <pavel@ucw.cz> - 2017-03-21 15:20 +0100
Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data Ingo Molnar <mingo@kernel.org> - 2017-03-22 08:30 +0100
Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data Jiri Slaby <jslaby@suse.cz> - 2017-03-22 08:50 +0100
Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data Ingo Molnar <mingo@kernel.org> - 2017-03-22 08:50 +0100
Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data Josh Poimboeuf <jpoimboe@redhat.com> - 2017-03-22 15:20 +0100
Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data Jiri Slaby <jslaby@suse.cz> - 2017-03-22 16:10 +0100
Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data Josh Poimboeuf <jpoimboe@redhat.com> - 2017-03-22 16:40 +0100
Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data Ingo Molnar <mingo@kernel.org> - 2017-03-23 08:40 +0100
Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data Josh Poimboeuf <jpoimboe@redhat.com> - 2017-03-23 14:30 +0100
Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data Jiri Slaby <jslaby@suse.cz> - 2017-03-22 13:10 +0100
Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data Pavel Machek <pavel@ucw.cz> - 2017-03-22 17:00 +0100
[RFC v2 10/10] x86: boot, extract efi_pe_entry from startup_64 Jiri Slaby <jslaby@suse.cz> - 2017-03-20 13:40 +0100
[PATCH v2 01/10] linkage: new macros for assembler symbols Jiri Slaby <jslaby@suse.cz> - 2017-03-20 13:40 +0100
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