x86/asm/purgatory: Start using annotations

Purgatory used no annotations at all. So include linux/linkage.h and
annotate everything:

* code by SYM_CODE_*
* data by SYM_DATA_*

 [ bp: Fixup comment in gdt: ]

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Alexios Zavras <alexios.zavras@intel.com>
Cc: Allison Randal <allison@lohutok.net>
Cc: Enrico Weigelt <info@metux.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-arch@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20191011115108.12392-16-jslaby@suse.cz

diff --git a/arch/x86/purgatory/entry64.S b/arch/x86/purgatory/entry64.S
index 275a646..0b4390c 100644 (file)
--- a/arch/x86/purgatory/entry64.S
+++ b/arch/x86/purgatory/entry64.S
@@ -8,13 +8,13 @@
  * This code has been taken from kexec-tools.
  */
 
+#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)
 
@@ -54,10 +54,11 @@ 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
@@ -75,13 +76,14 @@ 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:
-       /* 0x00 unusable segment
+SYM_DATA_START_LOCAL(gdt)
+       /*
+        * 0x00 unusable segment
         * 0x08 unused
         * so use them as gdt ptr
         */
@@ -94,6 +96,8 @@ 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_L_LOCAL, gdt_end)
+
+SYM_DATA_START_LOCAL(stack)
+       .quad   0, 0
+SYM_DATA_END_LABEL(stack, SYM_L_LOCAL, stack_init)

diff --git a/arch/x86/purgatory/setup-x86_64.S b/arch/x86/purgatory/setup-x86_64.S
index 321146b..89d9e9e 100644 (file)
--- a/arch/x86/purgatory/setup-x86_64.S
+++ b/arch/x86/purgatory/setup-x86_64.S
@@ -7,14 +7,14 @@
  *
  * This code has been taken from kexec-tools.
  */
+#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)
 
@@ -32,10 +32,12 @@ 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
         */
@@ -48,10 +50,10 @@ gdt:        /* 0x00 unusable segment
 
        /* 0x18 4GB flat data segment */
        .word   0xFFFF, 0x0000, 0x9200, 0x00CF
-gdt_end:
+SYM_DATA_END_LABEL(gdt, SYM_L_LOCAL, gdt_end)
 
        .bss
        .balign 4096
-lstack:
+SYM_DATA_START_LOCAL(lstack)
        .skip 4096
-lstack_end:
+SYM_DATA_END_LABEL(lstack, SYM_L_LOCAL, lstack_end)

diff --git a/arch/x86/purgatory/stack.S b/arch/x86/purgatory/stack.S
index 8b14274..1ef507c 100644 (file)
--- a/arch/x86/purgatory/stack.S
+++ b/arch/x86/purgatory/stack.S
@@ -5,13 +5,14 @@
  * Copyright (C) 2014 Red Hat Inc.
  */
 
+#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_L_GLOBAL, stack_end)