linux-kernel - [PATCH 2/4] x86: Cleanup vdso-layout.lds.S

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Date:	Thu, 14 May 2009 15:06:40 +0200
From:	Petr Tesarik <ptesarik@...e.cz>
To:	linux-kernel@...r.kernel.org, linux-x86_64@...r.kernel.org,
	mingo@...e.hu, andi@...stfloor.org
Cc:	zwane@....linux.org.uk, roland@...hat.com,
	Petr Tesarik <ptesarik@...e.cz>
Subject: [PATCH 2/4] x86: Cleanup vdso-layout.lds.S

Make the following changes:
  - move linker-generated sections out of .data
  - add all (even theoretically) possible rodata, data and text input
    sections to their respective output sections
  - discard .altinstructions and .altinstr_replacements

Since the .altinstructions section is currently not used anyway, this
is a pure cleanup.

Signed-off-by: Petr Tesarik <ptesarik@...e.cz>
---
 arch/x86/vdso/vdso-layout.lds.S |   25 ++++++++++++++++++-------
 1 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/arch/x86/vdso/vdso-layout.lds.S b/arch/x86/vdso/vdso-layout.lds.S
index 634a2cf..aaa3026 100644
--- a/arch/x86/vdso/vdso-layout.lds.S
+++ b/arch/x86/vdso/vdso-layout.lds.S
@@ -21,29 +21,40 @@ SECTIONS
 	.eh_frame_hdr	: { *(.eh_frame_hdr) }		:text	:eh_frame_hdr
 	.eh_frame	: { KEEP (*(.eh_frame)) }	:text
 
+	/* Linker-generated sections */
 	.dynamic	: { *(.dynamic) }		:text	:dynamic
+	.got		: { *(.got) }			:text
+	.got.plt	: { *(.got.plt) }
+	.dynbss		: { *(.dynbss) }
 
-	.rodata		: { *(.rodata*) }		:text
+	.rodata		: {
+	      *(.rodata*)
+	      *(.gnu.linkonce.r.*)
+	}
 	.data		: {
 	      *(.data*)
 	      *(.sdata*)
-	      *(.got.plt) *(.got)
 	      *(.gnu.linkonce.d.*)
 	      *(.bss*)
-	      *(.dynbss*)
+	      *(.sbss*)
 	      *(.gnu.linkonce.b.*)
 	}
 
-	.altinstructions	: { *(.altinstructions) }
-	.altinstr_replacement	: { *(.altinstr_replacement) }
-
 	/*
 	 * Align the actual code well away from the non-instruction data.
 	 * This is the best thing for the I-cache.
 	 */
 	. = ALIGN(0x100);
 
-	.text		: { *(.text*) }			:text	=0x90909090
+	.text		: {
+	      *(.text*)
+	      *(.gnu.linkonce.t.*)
+	}						:text	=0x90909090
+
+	/DISCARD/ : {
+	      *(.altinstructions)
+	      *(.altinstr_replacement)
+	}
 }
 
 /*
-- 
1.6.0.2


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