[PATCH v4 14/27] x86: purgatory, start using annotations

Jiri Slaby
2017-10-02T09:15:02Z

purgatory used no annotations. So include linux/linkage.h and annotate
everything:
* code by SYM_CODE_*
* data by SYM_DATA_*

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
---
arch/x86/purgatory/entry64.S | 21 ++++++++++++---------
arch/x86/purgatory/setup-x86_64.S | 14 ++++++++------
arch/x86/purgatory/stack.S | 7 ++++---
3 files changed, 24 insertions(+), 18 deletions(-)

diff --git a/arch/x86/purgatory/entry64.S b/arch/x86/purgatory/entry64.S
index d1a4291d3568..46482ae1ade4 100644
--- a/arch/x86/purgatory/entry64.S
+++ b/arch/x86/purgatory/entry64.S
@@ -10,13 +10,13 @@
* Version 2. See the file COPYING for more details.
*/

+#include <linux/linkage.h>
+
.text
.balign 16
.code64
- .globl entry64, entry64_regs
-

-entry64:
+SYM_CODE_START(entry64)
/* Setup a gdt that should be preserved */
lgdt gdt(%rip)

@@ -56,10 +56,11 @@ new_cs_exit:

/* Jump to the new code... */
jmpq *rip(%rip)
+SYM_CODE_END(entry64)

.section ".rodata"
.balign 4
-entry64_regs:
+SYM_DATA_START(entry64_regs)
rax: .quad 0x0
rcx: .quad 0x0
rdx: .quad 0x0
@@ -77,12 +78,12 @@ r13: .quad 0x0
r14: .quad 0x0
r15: .quad 0x0
rip: .quad 0x0
- .size entry64_regs, . - entry64_regs
+SYM_DATA_END(entry64_regs)

/* GDT */
.section ".rodata"
.balign 16
-gdt:
+SYM_DATA_START_LOCAL(gdt)
/* 0x00 unusable segment
* 0x08 unused
* so use them as gdt ptr
@@ -96,6 +97,8 @@ gdt:

/* 0x18 4GB flat data segment */
.word 0xFFFF, 0x0000, 0x9200, 0x00CF
-gdt_end:
-stack: .quad 0, 0
-stack_init:
+SYM_DATA_END_LABEL(gdt, SYM_V_LOCAL, gdt_end)
+
+SYM_DATA_START_LOCAL(stack)
+ .quad 0, 0
+SYM_DATA_END_LABEL(stack, SYM_V_LOCAL, stack_init)
diff --git a/arch/x86/purgatory/setup-x86_64.S b/arch/x86/purgatory/setup-x86_64.S
index dfae9b9e60b5..c71e8e55ecb7 100644
--- a/arch/x86/purgatory/setup-x86_64.S
+++ b/arch/x86/purgatory/setup-x86_64.S
@@ -9,14 +9,14 @@
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
*/
+#include <linux/linkage.h>
#include <asm/purgatory.h>

.text
- .globl purgatory_start
.balign 16
-purgatory_start:
.code64

+SYM_CODE_START(purgatory_start)
/* Load a gdt so I know what the segment registers are */
lgdt gdt(%rip)

@@ -34,10 +34,12 @@ purgatory_start:
/* Call the C code */
call purgatory
jmp entry64
+SYM_CODE_END(purgatory_start)

.section ".rodata"
.balign 16
-gdt: /* 0x00 unusable segment
+SYM_DATA_START_LOCAL(gdt)
+ /* 0x00 unusable segment
* 0x08 unused
* so use them as the gdt ptr
*/
@@ -50,10 +52,10 @@ gdt: /* 0x00 unusable segment

/* 0x18 4GB flat data segment */
.word 0xFFFF, 0x0000, 0x9200, 0x00CF
-gdt_end:
+SYM_DATA_END_LABEL(gdt, SYM_V_LOCAL, gdt_end)

.bss
.balign 4096
-lstack:
+SYM_DATA_START_LOCAL(lstack)
.skip 4096
-lstack_end:
+SYM_DATA_END_LABEL(lstack, SYM_V_LOCAL, lstack_end)
diff --git a/arch/x86/purgatory/stack.S b/arch/x86/purgatory/stack.S
index 50a4147f91fb..958ffc769705 100644
--- a/arch/x86/purgatory/stack.S
+++ b/arch/x86/purgatory/stack.S
@@ -7,13 +7,14 @@
* Version 2. See the file COPYING for more details.
*/

+#include <linux/linkage.h>
+
/* A stack for the loaded kernel.
* Separate and in the data section so it can be prepopulated.
*/
.data
.balign 4096
- .globl stack, stack_end

-stack:
+SYM_DATA_START(stack)
.skip 4096
-stack_end:
+SYM_DATA_END_LABEL(stack, SYM_V_GLOBAL, stack_end)
--
2.14.2