Commit 3835d69a authored by Russell King's avatar Russell King
Browse files

ARM: vmlinux.lds: move init sections between text and data sections 



Place the init sections between the text and data sections.  This
means all code is grouped together at the beginning of the kernel
image, and all data is at the end of the image.  This avoids problems
with the 24-bit branch instruction relocations becoming invalid with
large initramfs images.

Acked-by: default avatarNicolas Pitre <nicolas.pitre@linaro.org>
Tested-by: default avatarStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 43fc9d2f

arch/arm/kernel/vmlinux.lds.S

+48 −48
Original line number Diff line number Diff line
@@ -69,6 +69,53 @@ SECTIONS 
		_stext = .;

		HEAD_TEXT

	}

	.text : {			/* Real text segment		*/

		_text = .;		/* Text and read-only data	*/

			__exception_text_start = .;

			*(.exception.text)

			__exception_text_end = .;

			IRQENTRY_TEXT

			TEXT_TEXT

			SCHED_TEXT

			LOCK_TEXT

			KPROBES_TEXT

#ifdef CONFIG_MMU

			*(.fixup)

#endif

			*(.gnu.warning)

			*(.glue_7)

			*(.glue_7t)

		. = ALIGN(4);

		*(.got)			/* Global offset table		*/

			ARM_CPU_KEEP(PROC_INFO)

	}



	RO_DATA(PAGE_SIZE)



#ifdef CONFIG_ARM_UNWIND

	/*

	 * Stack unwinding tables

	 */

	. = ALIGN(8);

	.ARM.unwind_idx : {

		__start_unwind_idx = .;

		*(.ARM.exidx*)

		__stop_unwind_idx = .;

	}

	.ARM.unwind_tab : {

		__start_unwind_tab = .;

		*(.ARM.extab*)

		__stop_unwind_tab = .;

	}

#endif



	_etext = .;			/* End of text and rodata section */



#ifndef CONFIG_XIP_KERNEL

	. = ALIGN(PAGE_SIZE);

	__init_begin = .;

#endif



	INIT_TEXT_SECTION(8)

	.exit.text : {

		ARM_EXIT_KEEP(EXIT_TEXT)
@@ -116,58 +163,11 @@ SECTIONS 


	PERCPU_SECTION(32)



#ifndef CONFIG_XIP_KERNEL

	__init_begin = _stext;

	. = ALIGN(PAGE_SIZE);

	__init_end = .;

#endif



	.text : {			/* Real text segment		*/

		_text = .;		/* Text and read-only data	*/

			__exception_text_start = .;

			*(.exception.text)

			__exception_text_end = .;

			IRQENTRY_TEXT

			TEXT_TEXT

			SCHED_TEXT

			LOCK_TEXT

			KPROBES_TEXT

#ifdef CONFIG_MMU

			*(.fixup)

#endif

			*(.gnu.warning)

			*(.glue_7)

			*(.glue_7t)

		. = ALIGN(4);

		*(.got)			/* Global offset table		*/

			ARM_CPU_KEEP(PROC_INFO)

	}



	RO_DATA(PAGE_SIZE)



#ifdef CONFIG_ARM_UNWIND

	/*

	 * Stack unwinding tables

	 */

	. = ALIGN(8);

	.ARM.unwind_idx : {

		__start_unwind_idx = .;

		*(.ARM.exidx*)

		__stop_unwind_idx = .;

	}

	.ARM.unwind_tab : {

		__start_unwind_tab = .;

		*(.ARM.extab*)

		__stop_unwind_tab = .;

	}

#endif



	_etext = .;			/* End of text and rodata section */



#ifdef CONFIG_XIP_KERNEL

	__data_loc = ALIGN(4);		/* location in binary */

	. = PAGE_OFFSET + TEXT_OFFSET;

#else

	__init_end = .;

	. = ALIGN(THREAD_SIZE);

	__data_loc = .;

#endif

arch/arm/mm/init.c

+2 −2
Original line number Diff line number Diff line
@@ -639,8 +639,8 @@ void __init mem_init(void) 
			"    pkmap   : 0x%08lx - 0x%08lx   (%4ld MB)\n"

#endif

			"    modules : 0x%08lx - 0x%08lx   (%4ld MB)\n"

			"      .init : 0x%p" " - 0x%p" "   (%4d kB)\n"

			"      .text : 0x%p" " - 0x%p" "   (%4d kB)\n"

			"      .init : 0x%p" " - 0x%p" "   (%4d kB)\n"

			"      .data : 0x%p" " - 0x%p" "   (%4d kB)\n"

			"       .bss : 0x%p" " - 0x%p" "   (%4d kB)\n",
@@ -662,8 +662,8 @@ void __init mem_init(void) 
#endif

			MLM(MODULES_VADDR, MODULES_END),



			MLK_ROUNDUP(__init_begin, __init_end),

			MLK_ROUNDUP(_text, _etext),

			MLK_ROUNDUP(__init_begin, __init_end),

			MLK_ROUNDUP(_sdata, _edata),

			MLK_ROUNDUP(__bss_start, __bss_stop));

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