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authorSam Ravnborg <sam@ravnborg.org>2009-04-29 09:47:21 +0200
committerIngo Molnar <mingo@elte.hu>2009-04-29 10:20:31 +0200
commitdfc20895d944cfa81d8ff00809b68ecb8f72cbb0 (patch)
tree1494f69d70ce845e15415a13733d3b89827d4264 /arch/x86/kernel/vmlinux.lds.S
parent444e0ae4831f99ba25062d9a5ccb7117c62841a0 (diff)
downloadop-kernel-dev-dfc20895d944cfa81d8ff00809b68ecb8f72cbb0.zip
op-kernel-dev-dfc20895d944cfa81d8ff00809b68ecb8f72cbb0.tar.gz
x86, vmlinux.lds: unify .text output sections
32 bit x86 had a dedicated .text.head output section, whereas 64 bit had it all in a single output section. In the unified version the dedicated .text.head output section was kept to have full control over the head code. 32 bit: - Moved definition of _stext to the linker script. The definition is located _after_ .text.page_aligned as this is what 32 bit did before. The ALIGN(8) was introduced so we hit the exact same address (on the tested config) before and after the move. I assume that it is a bug that _stext did not cover the .text.page_aligned section - if this is true it can be fixed in a follow-up patch (and the ugly ALIGN() can be dropped). [ Impact: 64-bit: cleanup, 32-bit: use the 64-bit linker script ] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1240991249-27117-5-git-send-email-sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/vmlinux.lds.S')
-rw-r--r--arch/x86/kernel/vmlinux.lds.S31
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 845776f..a7c88bb 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -64,6 +64,37 @@ SECTIONS
phys_startup_64 = startup_64 - LOAD_OFFSET;
#endif
+ /* Text and read-only data */
+
+ /* bootstrapping code */
+ .text.head : AT(ADDR(.text.head) - LOAD_OFFSET) {
+ _text = .;
+ *(.text.head)
+ } :text = 0x9090
+
+ /* The rest of the text */
+ .text : AT(ADDR(.text) - LOAD_OFFSET) {
+#ifdef CONFIG_X86_32
+ /* not really needed, already page aligned */
+ . = ALIGN(PAGE_SIZE);
+ *(.text.page_aligned)
+#endif
+ . = ALIGN(8);
+ _stext = .;
+ TEXT_TEXT
+ SCHED_TEXT
+ LOCK_TEXT
+ KPROBES_TEXT
+ IRQENTRY_TEXT
+ *(.fixup)
+ *(.gnu.warning)
+ /* End of text section */
+ _etext = .;
+ } :text = 0x9090
+
+ NOTES :text :note
+
+
#ifdef CONFIG_X86_32
# include "vmlinux_32.lds.S"
#else
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