[Xen-devel] [PATCH v4 21/27] x86_64: assembly, add ENDs to some functions and relabel with SYM_CODE_*

[Jiri Slaby <jslaby@xxxxxxx>]

All these are functions which are invoked from elsewhere, but they are
not typical C functions. So we annotate them (as global) using the new
SYM_CODE_START. All these were not balanced with any END, so mark their
ends by SYM_CODE_END, appropriatelly.

Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Cc: Juergen Gross <jgross@xxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: x86@xxxxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
---
 arch/x86/boot/compressed/head_64.S   |  3 ++-
 arch/x86/platform/olpc/xo1-wakeup.S  |  3 ++-
 arch/x86/power/hibernate_asm_64.S    |  6 ++++--
 arch/x86/realmode/rm/reboot.S        |  3 ++-
 arch/x86/realmode/rm/trampoline_64.S | 10 +++++++---
 arch/x86/realmode/rm/wakeup_asm.S    |  3 ++-
 arch/x86/xen/xen-asm_64.S            |  6 ++++--
 7 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/arch/x86/boot/compressed/head_64.S 
b/arch/x86/boot/compressed/head_64.S
index 1a2dd7b18a40..11b8ebc2f08a 100644
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -232,7 +232,7 @@ ENDPROC(efi32_stub_entry)
 
        .code64
        .org 0x200
-ENTRY(startup_64)
+SYM_CODE_START(startup_64)
        /*
         * 64bit entry is 0x200 and it is ABI so immutable!
         * We come here either from startup_32 or directly from a
@@ -352,6 +352,7 @@ lvl5:
  */
        leaq    relocated(%rbx), %rax
        jmp     *%rax
+SYM_CODE_END(startup_64)
 
 #ifdef CONFIG_EFI_STUB
 
diff --git a/arch/x86/platform/olpc/xo1-wakeup.S 
b/arch/x86/platform/olpc/xo1-wakeup.S
index 948deb289753..71ff5814fca4 100644
--- a/arch/x86/platform/olpc/xo1-wakeup.S
+++ b/arch/x86/platform/olpc/xo1-wakeup.S
@@ -89,7 +89,7 @@ restore_registers:
 
        ret
 
-ENTRY(do_olpc_suspend_lowlevel)
+SYM_CODE_START(do_olpc_suspend_lowlevel)
        call    save_processor_state
        call    save_registers
 
@@ -109,6 +109,7 @@ ret_point:
        call    restore_registers
        call    restore_processor_state
        ret
+SYM_CODE_END(do_olpc_suspend_lowlevel)
 
 .data
 saved_gdt:             .long   0,0
diff --git a/arch/x86/power/hibernate_asm_64.S 
b/arch/x86/power/hibernate_asm_64.S
index ce8da3a0412c..44755a847856 100644
--- a/arch/x86/power/hibernate_asm_64.S
+++ b/arch/x86/power/hibernate_asm_64.S
@@ -53,7 +53,7 @@ ENTRY(swsusp_arch_suspend)
        ret
 ENDPROC(swsusp_arch_suspend)
 
-ENTRY(restore_image)
+SYM_CODE_START(restore_image)
        /* prepare to jump to the image kernel */
        movq    restore_jump_address(%rip), %r8
        movq    restore_cr3(%rip), %r9
@@ -68,9 +68,10 @@ ENTRY(restore_image)
        /* jump to relocated restore code */
        movq    relocated_restore_code(%rip), %rcx
        jmpq    *%rcx
+SYM_CODE_END(restore_image)
 
        /* code below has been relocated to a safe page */
-ENTRY(core_restore_code)
+SYM_CODE_START(core_restore_code)
        /* switch to temporary page tables */
        movq    %rax, %cr3
        /* flush TLB */
@@ -98,6 +99,7 @@ ENTRY(core_restore_code)
 .Ldone:
        /* jump to the restore_registers address from the image header */
        jmpq    *%r8
+SYM_CODE_END(core_restore_code)
 
         /* code below belongs to the image kernel */
        .align PAGE_SIZE
diff --git a/arch/x86/realmode/rm/reboot.S b/arch/x86/realmode/rm/reboot.S
index 49cf0f9d513e..ff01bc5b485d 100644
--- a/arch/x86/realmode/rm/reboot.S
+++ b/arch/x86/realmode/rm/reboot.S
@@ -18,7 +18,7 @@
  */
        .section ".text32", "ax"
        .code32
-ENTRY(machine_real_restart_asm)
+SYM_CODE_START(machine_real_restart_asm)
 
 #ifdef CONFIG_X86_64
        /* Switch to trampoline GDT as it is guaranteed < 4 GiB */
@@ -62,6 +62,7 @@ SYM_CODE_INNER_LABEL_NOALIGN(machine_real_restart_paging_off, 
SYM_V_GLOBAL)
        movl    %ecx, %gs
        movl    %ecx, %ss
        ljmpw   $8, $1f
+SYM_CODE_END(machine_real_restart_asm)
 
 /*
  * This is 16-bit protected mode code to disable paging and the cache,
diff --git a/arch/x86/realmode/rm/trampoline_64.S 
b/arch/x86/realmode/rm/trampoline_64.S
index 7f579f8dfcd9..2d02e38b68aa 100644
--- a/arch/x86/realmode/rm/trampoline_64.S
+++ b/arch/x86/realmode/rm/trampoline_64.S
@@ -37,7 +37,7 @@
        .code16
 
        .balign PAGE_SIZE
-ENTRY(trampoline_start)
+SYM_CODE_START(trampoline_start)
        cli                     # We should be safe anyway
        wbinvd
 
@@ -80,12 +80,14 @@ ENTRY(trampoline_start)
 no_longmode:
        hlt
        jmp no_longmode
+SYM_CODE_END(trampoline_start)
+
 #include "../kernel/verify_cpu.S"
 
        .section ".text32","ax"
        .code32
        .balign 4
-ENTRY(startup_32)
+SYM_CODE_START(startup_32)
        movl    %edx, %ss
        addl    $pa_real_mode_base, %esp
        movl    %edx, %ds
@@ -139,13 +141,15 @@ ENTRY(startup_32)
         * the new gdt/idt that has __KERNEL_CS with CS.L = 1.
         */
        ljmpl   $__KERNEL_CS, $pa_startup_64
+SYM_CODE_END(startup_32)
 
        .section ".text64","ax"
        .code64
        .balign 4
-ENTRY(startup_64)
+SYM_CODE_START(startup_64)
        # Now jump into the kernel using virtual addresses
        jmpq    *tr_start(%rip)
+SYM_CODE_END(startup_64)
 
        .section ".rodata","a"
        # Duplicate the global descriptor table
diff --git a/arch/x86/realmode/rm/wakeup_asm.S 
b/arch/x86/realmode/rm/wakeup_asm.S
index 4eaad1c4aed1..30e14a513e5e 100644
--- a/arch/x86/realmode/rm/wakeup_asm.S
+++ b/arch/x86/realmode/rm/wakeup_asm.S
@@ -36,7 +36,7 @@ SYM_DATA_END(wakeup_header)
        .code16
 
        .balign 16
-ENTRY(wakeup_start)
+SYM_CODE_START(wakeup_start)
        cli
        cld
 
@@ -134,6 +134,7 @@ ENTRY(wakeup_start)
 #else
        jmp     trampoline_start
 #endif
+SYM_CODE_END(wakeup_start)
 
 bogus_real_magic:
 1:
diff --git a/arch/x86/xen/xen-asm_64.S b/arch/x86/xen/xen-asm_64.S
index f7e9a8344910..4afa50c40f12 100644
--- a/arch/x86/xen/xen-asm_64.S
+++ b/arch/x86/xen/xen-asm_64.S
@@ -69,11 +69,12 @@ hypercall_iret = hypercall_page + __HYPERVISOR_iret * 32
  *     r11             }<-- pushed by hypercall page
  * rsp->rax            }
  */
-ENTRY(xen_iret)
+SYM_CODE_START(xen_iret)
        pushq $0
        jmp hypercall_iret
+SYM_CODE_END(xen_iret)
 
-ENTRY(xen_sysret64)
+SYM_CODE_START(xen_sysret64)
        /*
         * We're already on the usermode stack at this point, but
         * still with the kernel gs, so we can easily switch back
@@ -89,6 +90,7 @@ ENTRY(xen_sysret64)
 
        pushq $VGCF_in_syscall
        jmp hypercall_iret
+SYM_CODE_END(xen_sysret64)
 
 /*
  * Xen handles syscall callbacks much like ordinary exceptions, which
-- 
2.14.2


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