Testing of function/data-sections on linux-2.6.35-rc4

Commit Message

Denys Vlasenko July 26, 2010, 1:29 a.m. UTC

None

Patch

--- linux-2.6.35-rc4/arch/frv/kernel/vmlinux.lds.S
+++ linux-2.6.35-rc4-fs-kernel-linker-scripts/arch/frv/kernel/vmlinux.lds.S
@@ -114,7 +114,6 @@ 
 
   .sbss		: { *(.sbss .sbss.*) }
   .bss		: { *(.bss .bss.*) }
-  .bss..stack	: { *(.bss) }
 
   __bss_stop = .;
   _end = . ;
--- linux-2.6.35-rc4/arch/ia64/scripts/check-segrel.lds
+++ linux-2.6.35-rc4-fs-kernel-linker-scripts/arch/ia64/scripts/check-segrel.lds
@@ -1,9 +1,9 @@ 
 SECTIONS {
 	. = SIZEOF_HEADERS;
-	.rodata : { *(.rodata) } :ro
+	.rodata : { *(.rodata) *(.rodata.*) } :ro
 	.note : { *(.note*) }
 	. = 0xa0000;
-	.data : { *(.data) } :dat
+	.data : { *(.data) *(.data.*) } :dat
 	/DISCARD/ : { *(*) }
 }
 PHDRS {
--- linux-2.6.35-rc4/arch/m68knommu/kernel/vmlinux.lds.S
+++ linux-2.6.35-rc4-fs-kernel-linker-scripts/arch/m68knommu/kernel/vmlinux.lds.S
@@ -169,6 +169,7 @@ 
 		. = ALIGN(4);
 		_sbss = . ;
 		*(.bss)
+		*(.bss.*)
 		*(COMMON)
 		. = ALIGN(4) ;
 		_ebss = . ;
--- linux-2.6.35-rc4/arch/mips/lasat/image/romscript.normal
+++ linux-2.6.35-rc4-fs-kernel-linker-scripts/arch/mips/lasat/image/romscript.normal
@@ -12,6 +12,7 @@ 
   .data ALIGN(0x10) :
   {
     *(.data)
+    *(.data.*)
   }
   _image_start = ADDR(.data);
   _image_size = SIZEOF(.data);
--- linux-2.6.35-rc4/arch/parisc/kernel/vmlinux.lds.S
+++ linux-2.6.35-rc4-fs-kernel-linker-scripts/arch/parisc/kernel/vmlinux.lds.S
@@ -112,6 +112,7 @@ 
 	}
 	.bss : {
 		*(.bss)
+		*(.bss.*)
 		*(COMMON)
 	}
 	__bss_stop = .;
--- linux-2.6.35-rc4/arch/sh/kernel/vsyscall/vsyscall.lds.S
+++ linux-2.6.35-rc4-fs-kernel-linker-scripts/arch/sh/kernel/vsyscall/vsyscall.lds.S
@@ -35,7 +35,7 @@ 
 	 */
 	. = 0x400;
 
-	.text		: { *(.text) } 			:text	=0x90909090
+	.text		: { *(.text) *(.text.*) }	:text	=0x90909090
 	.note		: { *(.note.*) }		:text	:note
 	.eh_frame_hdr	: { *(.eh_frame_hdr ) }		:text	:eh_frame_hdr
 	.eh_frame	: {
--- linux-2.6.35-rc4/arch/x86/kernel/acpi/realmode/wakeup.lds.S
+++ linux-2.6.35-rc4-fs-kernel-linker-scripts/arch/x86/kernel/acpi/realmode/wakeup.lds.S
@@ -42,6 +42,7 @@ 
 	.bss :	{
 		__bss_start = .;
 		*(.bss)
+		*(.bss.*)
 		__bss_end = .;
 	}
 
--- linux-2.6.35-rc4/arch/x86/kernel/vmlinux.lds.S
+++ linux-2.6.35-rc4-fs-kernel-linker-scripts/arch/x86/kernel/vmlinux.lds.S
@@ -307,6 +307,7 @@ 
 		__bss_start = .;
 		*(.bss..page_aligned)
 		*(.bss)
+		*(.bss.*)
 		. = ALIGN(4);
 		__bss_stop = .;
 	}
--- linux-2.6.35-rc4/include/asm-generic/vmlinux.lds.h
+++ linux-2.6.35-rc4-fs-kernel-linker-scripts/include/asm-generic/vmlinux.lds.h
@@ -140,9 +140,22 @@ 
 #define TRACE_SYSCALLS()
 #endif
 
+/* .data.foo are generated by gcc itself with -fdata-sections,
+ * whereas double-dot sections (like .data..percpu) are generated
+ * by kernel's magic macros.
+ *
+ * arch/.../vmlinux.lds.S decides where to place various double-dot sections
+ * as needed by its arch, here DATA_DATA needs to be careful and collect
+ * only .data and .data.foo sections, skipping .data..foo
+ *
+ * Same goes for .text, .bss and .rodata. In case of .rodata, various
+ * .rodata.foo sections are generated by gcc even without -fdata-sections
+ */
+
 /* .data section */
 #define DATA_DATA							\
 	*(.data)							\
+	*(.data.[A-Za-z0-9_$^]*)					\
 	*(.ref.data)							\
 	DEV_KEEP(init.data)						\
 	DEV_KEEP(exit.data)						\
@@ -202,7 +215,8 @@ 
 	. = ALIGN((align));						\
 	.rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {		\
 		VMLINUX_SYMBOL(__start_rodata) = .;			\
-		*(.rodata) *(.rodata.*)					\
+		*(.rodata)						\
+		*(.rodata.[A-Za-z0-9_$^]*)				\
 		*(__vermagic)		/* Kernel version magic */	\
 		*(__markers_strings)	/* Markers: strings */		\
 		*(__tracepoints_strings)/* Tracepoints: strings */	\
@@ -369,6 +383,7 @@ 
 		ALIGN_FUNCTION();					\
 		*(.text.hot)						\
 		*(.text)						\
+		*(.text.[A-Za-z0-9_$^]*)				\
 		*(.ref.text)						\
 	DEV_KEEP(init.text)						\
 	DEV_KEEP(exit.text)						\
@@ -502,6 +517,7 @@ 
 		*(.bss..page_aligned)					\
 		*(.dynbss)						\
 		*(.bss)							\
+		*(.bss.[A-Za-z0-9_$^]*)					\
 		*(COMMON)						\
 	}