bff595c15c
This patch adds the main functionality for parsing the stack unwinding information generated by the ARM EABI toolchains. The unwinding information consists of an index with a pair of words per function and a table with unwinding instructions. For more information, see "Exception Handling ABI for the ARM Architecture" at: http://infocenter.arm.com/help/topic/com.arm.doc.subset.swdev.abi/index.html Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
211 lines
4 KiB
ArmAsm
211 lines
4 KiB
ArmAsm
/* ld script to make ARM Linux kernel
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* taken from the i386 version by Russell King
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* Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
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*/
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#include <asm-generic/vmlinux.lds.h>
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#include <asm/thread_info.h>
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#include <asm/memory.h>
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OUTPUT_ARCH(arm)
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ENTRY(stext)
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#ifndef __ARMEB__
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jiffies = jiffies_64;
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#else
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jiffies = jiffies_64 + 4;
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#endif
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SECTIONS
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{
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#ifdef CONFIG_XIP_KERNEL
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. = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR);
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#else
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. = PAGE_OFFSET + TEXT_OFFSET;
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#endif
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.text.head : {
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_stext = .;
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_sinittext = .;
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*(.text.head)
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}
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.init : { /* Init code and data */
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INIT_TEXT
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_einittext = .;
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__proc_info_begin = .;
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*(.proc.info.init)
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__proc_info_end = .;
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__arch_info_begin = .;
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*(.arch.info.init)
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__arch_info_end = .;
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__tagtable_begin = .;
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*(.taglist.init)
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__tagtable_end = .;
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. = ALIGN(16);
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__setup_start = .;
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*(.init.setup)
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__setup_end = .;
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__early_begin = .;
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*(.early_param.init)
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__early_end = .;
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__initcall_start = .;
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INITCALLS
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__initcall_end = .;
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__con_initcall_start = .;
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*(.con_initcall.init)
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__con_initcall_end = .;
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__security_initcall_start = .;
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*(.security_initcall.init)
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__security_initcall_end = .;
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#ifdef CONFIG_BLK_DEV_INITRD
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. = ALIGN(32);
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__initramfs_start = .;
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usr/built-in.o(.init.ramfs)
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__initramfs_end = .;
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#endif
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. = ALIGN(4096);
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__per_cpu_start = .;
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*(.data.percpu)
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*(.data.percpu.shared_aligned)
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__per_cpu_end = .;
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#ifndef CONFIG_XIP_KERNEL
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__init_begin = _stext;
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INIT_DATA
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. = ALIGN(4096);
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__init_end = .;
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#endif
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}
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/DISCARD/ : { /* Exit code and data */
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EXIT_TEXT
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EXIT_DATA
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*(.exitcall.exit)
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*(.ARM.exidx.exit.text)
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*(.ARM.extab.exit.text)
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#ifndef CONFIG_MMU
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*(.fixup)
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*(__ex_table)
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#endif
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}
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.text : { /* Real text segment */
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_text = .; /* Text and read-only data */
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__exception_text_start = .;
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*(.exception.text)
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__exception_text_end = .;
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TEXT_TEXT
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SCHED_TEXT
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LOCK_TEXT
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KPROBES_TEXT
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#ifdef CONFIG_MMU
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*(.fixup)
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#endif
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*(.gnu.warning)
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*(.rodata)
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*(.rodata.*)
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*(.glue_7)
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*(.glue_7t)
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*(.got) /* Global offset table */
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}
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RODATA
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_etext = .; /* End of text and rodata section */
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#ifdef CONFIG_ARM_UNWIND
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/*
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* Stack unwinding tables
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*/
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. = ALIGN(8);
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.ARM.unwind_idx : {
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__start_unwind_idx = .;
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*(.ARM.exidx*)
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__stop_unwind_idx = .;
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}
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.ARM.unwind_tab : {
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__start_unwind_tab = .;
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*(.ARM.extab*)
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__stop_unwind_tab = .;
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}
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#endif
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#ifdef CONFIG_XIP_KERNEL
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__data_loc = ALIGN(4); /* location in binary */
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. = PAGE_OFFSET + TEXT_OFFSET;
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#else
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. = ALIGN(THREAD_SIZE);
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__data_loc = .;
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#endif
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.data : AT(__data_loc) {
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_data = .; /* address in memory */
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/*
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* first, the init task union, aligned
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* to an 8192 byte boundary.
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*/
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*(.data.init_task)
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#ifdef CONFIG_XIP_KERNEL
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. = ALIGN(4096);
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__init_begin = .;
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INIT_DATA
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. = ALIGN(4096);
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__init_end = .;
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#endif
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. = ALIGN(4096);
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__nosave_begin = .;
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*(.data.nosave)
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. = ALIGN(4096);
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__nosave_end = .;
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/*
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* then the cacheline aligned data
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*/
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. = ALIGN(32);
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*(.data.cacheline_aligned)
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/*
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* The exception fixup table (might need resorting at runtime)
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*/
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. = ALIGN(32);
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__start___ex_table = .;
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#ifdef CONFIG_MMU
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*(__ex_table)
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#endif
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__stop___ex_table = .;
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/*
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* and the usual data section
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*/
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DATA_DATA
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CONSTRUCTORS
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_edata = .;
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}
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_edata_loc = __data_loc + SIZEOF(.data);
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.bss : {
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__bss_start = .; /* BSS */
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*(.bss)
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*(COMMON)
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_end = .;
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}
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/* Stabs debugging sections. */
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.stab 0 : { *(.stab) }
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.stabstr 0 : { *(.stabstr) }
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.stab.excl 0 : { *(.stab.excl) }
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.stab.exclstr 0 : { *(.stab.exclstr) }
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.stab.index 0 : { *(.stab.index) }
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.stab.indexstr 0 : { *(.stab.indexstr) }
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.comment 0 : { *(.comment) }
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}
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/*
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* These must never be empty
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* If you have to comment these two assert statements out, your
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* binutils is too old (for other reasons as well)
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*/
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ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
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ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
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