From: Ian Campbell <ian.campbell@citrix.com>
Date: Mon, 21 Jul 2014 13:00:00 +0000 (+0100)
Subject: xen: arm: Correctly use GLOBAL/ENTRY in head.S, avoid .global
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~4611
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=c3412c04b1eeb986670d3c74e5c6c481a0ab9efb;p=xen.git

xen: arm: Correctly use GLOBAL/ENTRY in head.S, avoid .global

Use ENTRY() for function entry points since it ensures correct
alignment where GLOBAL() doesn't. The exception is the initial start
label which must be at offset 0, so just use GLOBAL() to avoid the
possibility of realignment.

Since everything happens to already be aligned there should be no
difference to the actual binary. objdump agrees.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Julien Grall <julien.grall@linaro.org>
---

diff --git a/xen/arch/arm/arm32/head.S b/xen/arch/arm/arm32/head.S
index 2547ce1d6d..ec5797462c 100644
--- a/xen/arch/arm/arm32/head.S
+++ b/xen/arch/arm/arm32/head.S
@@ -76,8 +76,7 @@
          * It should be linked at XEN_VIRT_START, and loaded at any
          * 4K-aligned address.  All of text+data+bss must fit in 2MB,
          * or the initial pagetable code below will need adjustment. */
-        .global start
-start:
+GLOBAL(start)
         /* zImage magic header, see:
          * http://www.simtec.co.uk/products/SWLINUX/files/booting_article.html#d0e309
          */
@@ -583,16 +582,15 @@ hex:    .ascii "0123456789abcdef"
 
 #else  /* CONFIG_EARLY_PRINTK */
 
+ENTRY(early_puts)
 init_uart:
-.global early_puts
-early_puts:
 puts:
 putn:   mov   pc, lr
 
 #endif /* !CONFIG_EARLY_PRINTK */
 
 /* This provides a C-API version of __lookup_processor_type */
-GLOBAL(lookup_processor_type)
+ENTRY(lookup_processor_type)
         stmfd sp!, {r4, r10, lr}
         mov   r10, #0                   /* r10 := offset between virt&phys */
         bl    __lookup_processor_type
diff --git a/xen/arch/arm/arm64/head.S b/xen/arch/arm/arm64/head.S
index b71b6f0812..dcb7071494 100644
--- a/xen/arch/arm/arm64/head.S
+++ b/xen/arch/arm/arm64/head.S
@@ -100,8 +100,7 @@
          * or the initial pagetable code below will need adjustment.
          */
 
-        .global start
-start:
+GLOBAL(start)
         /*
          * DO NOT MODIFY. Image header expected by Linux boot-loaders.
          */
@@ -604,9 +603,8 @@ hex:    .ascii "0123456789abcdef"
 
 #else  /* CONFIG_EARLY_PRINTK */
 
+ENTRY(early_puts)
 init_uart:
-.global early_puts
-early_puts:
 puts:
 putn:   ret
 
@@ -615,7 +613,7 @@ putn:   ret
 /* This provides a C-API version of __lookup_processor_type
  * TODO: For now, the implementation return NULL every time
  */
-GLOBAL(lookup_processor_type)
+ENTRY(lookup_processor_type)
         mov  x0, #0
         ret