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From: "Jan Beulich" <JBeulich@suse.com>
To: xen-devel <xen-devel@lists.xenproject.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
	Keir Fraser <keir@xen.org>,
	David Vrabel <david.vrabel@citrix.com>
Subject: [PATCH] x86: put kexec_reloc in its own section
Date: Thu, 17 Mar 2016 10:17:38 -0600	[thread overview]
Message-ID: <56EAE6B202000078000DDFC5@prv-mh.provo.novell.com> (raw)

[-- Attachment #1: Type: text/plain, Size: 804 bytes --]

Since it wants to be page aligned, this alignment would force pointless
alignment of .text in the intermediate built_in.o file(s), needlessly
growing the overall text and binary size.

Signed-off-by: Jan Beulich <jbeulich@suse.com>

--- a/xen/arch/x86/x86_64/kexec_reloc.S
+++ b/xen/arch/x86/x86_64/kexec_reloc.S
@@ -18,7 +18,7 @@
 #include <asm/page.h>
 #include <asm/machine_kexec.h>
 
-        .text
+        .section .text.kexec, "ax", @progbits
         .align PAGE_SIZE
         .code64
 
--- a/xen/arch/x86/xen.lds.S
+++ b/xen/arch/x86/xen.lds.S
@@ -49,6 +49,7 @@ SECTIONS
        *(.text.cold)
        *(.text.unlikely)
        *(.fixup)
+       *(.text.kexec)
        *(.gnu.warning)
        _etext = .;             /* End of text section */
   } :text = 0x9090




[-- Attachment #2: x86-kexec-text.patch --]
[-- Type: text/plain, Size: 841 bytes --]

x86: put kexec_reloc in its own section

Since it wants to be page aligned, this alignment would force pointless
alignment of .text in the intermediate built_in.o file(s), needlessly
growing the overall text and binary size.

Signed-off-by: Jan Beulich <jbeulich@suse.com>

--- a/xen/arch/x86/x86_64/kexec_reloc.S
+++ b/xen/arch/x86/x86_64/kexec_reloc.S
@@ -18,7 +18,7 @@
 #include <asm/page.h>
 #include <asm/machine_kexec.h>
 
-        .text
+        .section .text.kexec, "ax", @progbits
         .align PAGE_SIZE
         .code64
 
--- a/xen/arch/x86/xen.lds.S
+++ b/xen/arch/x86/xen.lds.S
@@ -49,6 +49,7 @@ SECTIONS
        *(.text.cold)
        *(.text.unlikely)
        *(.fixup)
+       *(.text.kexec)
        *(.gnu.warning)
        _etext = .;             /* End of text section */
   } :text = 0x9090

[-- Attachment #3: Type: text/plain, Size: 126 bytes --]

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             reply	other threads:[~2016-03-17 16:17 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-17 16:17 Jan Beulich [this message]
2016-03-17 16:19 ` Andrew Cooper
2016-03-17 17:41 ` David Vrabel

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