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353 lines
7.1 KiB
353 lines
7.1 KiB
/* 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/cache.h> |
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#include <asm/thread_info.h> |
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#include <asm/memory.h> |
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#include <asm/page.h> |
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#ifdef CONFIG_ARM_KERNMEM_PERMS |
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#include <asm/pgtable.h> |
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#endif |
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#define PROC_INFO \ |
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. = ALIGN(4); \ |
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VMLINUX_SYMBOL(__proc_info_begin) = .; \ |
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*(.proc.info.init) \ |
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VMLINUX_SYMBOL(__proc_info_end) = .; |
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#define IDMAP_TEXT \ |
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ALIGN_FUNCTION(); \ |
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VMLINUX_SYMBOL(__idmap_text_start) = .; \ |
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*(.idmap.text) \ |
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VMLINUX_SYMBOL(__idmap_text_end) = .; \ |
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. = ALIGN(PAGE_SIZE); \ |
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VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \ |
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*(.hyp.idmap.text) \ |
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VMLINUX_SYMBOL(__hyp_idmap_text_end) = .; |
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#ifdef CONFIG_HOTPLUG_CPU |
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#define ARM_CPU_DISCARD(x) |
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#define ARM_CPU_KEEP(x) x |
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#else |
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#define ARM_CPU_DISCARD(x) x |
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#define ARM_CPU_KEEP(x) |
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#endif |
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#if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \ |
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defined(CONFIG_GENERIC_BUG) |
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#define ARM_EXIT_KEEP(x) x |
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#define ARM_EXIT_DISCARD(x) |
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#else |
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#define ARM_EXIT_KEEP(x) |
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#define ARM_EXIT_DISCARD(x) x |
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#endif |
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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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/* |
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* XXX: The linker does not define how output sections are |
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* assigned to input sections when there are multiple statements |
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* matching the same input section name. There is no documented |
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* order of matching. |
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* |
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* unwind exit sections must be discarded before the rest of the |
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* unwind sections get included. |
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*/ |
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/DISCARD/ : { |
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*(.ARM.exidx.exit.text) |
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*(.ARM.extab.exit.text) |
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ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text)) |
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ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text)) |
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ARM_EXIT_DISCARD(EXIT_TEXT) |
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ARM_EXIT_DISCARD(EXIT_DATA) |
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EXIT_CALL |
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#ifndef CONFIG_MMU |
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*(.text.fixup) |
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*(__ex_table) |
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#endif |
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#ifndef CONFIG_SMP_ON_UP |
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*(.alt.smp.init) |
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#endif |
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*(.discard) |
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*(.discard.*) |
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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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.head.text : { |
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_text = .; |
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HEAD_TEXT |
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} |
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#ifdef CONFIG_ARM_KERNMEM_PERMS |
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. = ALIGN(1<<SECTION_SHIFT); |
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#endif |
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.text : { /* Real text segment */ |
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_stext = .; /* Text and read-only data */ |
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IDMAP_TEXT |
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__exception_text_start = .; |
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*(.exception.text) |
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__exception_text_end = .; |
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IRQENTRY_TEXT |
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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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*(.gnu.warning) |
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*(.glue_7) |
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*(.glue_7t) |
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. = ALIGN(4); |
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*(.got) /* Global offset table */ |
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ARM_CPU_KEEP(PROC_INFO) |
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} |
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#ifdef CONFIG_DEBUG_RODATA |
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. = ALIGN(1<<SECTION_SHIFT); |
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#endif |
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_etext = .; /* End of text section */ |
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RO_DATA(PAGE_SIZE) |
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. = ALIGN(4); |
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__ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { |
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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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#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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NOTES |
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#ifndef CONFIG_XIP_KERNEL |
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# ifdef CONFIG_ARM_KERNMEM_PERMS |
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. = ALIGN(1<<SECTION_SHIFT); |
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# else |
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. = ALIGN(PAGE_SIZE); |
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# endif |
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__init_begin = .; |
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#endif |
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/* |
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* The vectors and stubs are relocatable code, and the |
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* only thing that matters is their relative offsets |
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*/ |
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__vectors_start = .; |
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.vectors 0 : AT(__vectors_start) { |
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*(.vectors) |
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} |
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. = __vectors_start + SIZEOF(.vectors); |
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__vectors_end = .; |
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__stubs_start = .; |
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.stubs 0x1000 : AT(__stubs_start) { |
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*(.stubs) |
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} |
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. = __stubs_start + SIZEOF(.stubs); |
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__stubs_end = .; |
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INIT_TEXT_SECTION(8) |
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.exit.text : { |
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ARM_EXIT_KEEP(EXIT_TEXT) |
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} |
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.init.proc.info : { |
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ARM_CPU_DISCARD(PROC_INFO) |
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} |
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.init.arch.info : { |
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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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} |
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.init.tagtable : { |
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__tagtable_begin = .; |
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*(.taglist.init) |
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__tagtable_end = .; |
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} |
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#ifdef CONFIG_SMP_ON_UP |
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.init.smpalt : { |
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__smpalt_begin = .; |
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*(.alt.smp.init) |
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__smpalt_end = .; |
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} |
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#endif |
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.init.pv_table : { |
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__pv_table_begin = .; |
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*(.pv_table) |
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__pv_table_end = .; |
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} |
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.init.data : { |
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#ifndef CONFIG_XIP_KERNEL |
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INIT_DATA |
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#endif |
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INIT_SETUP(16) |
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INIT_CALLS |
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CON_INITCALL |
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SECURITY_INITCALL |
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INIT_RAM_FS |
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} |
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#ifndef CONFIG_XIP_KERNEL |
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.exit.data : { |
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ARM_EXIT_KEEP(EXIT_DATA) |
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} |
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#endif |
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#ifdef CONFIG_SMP |
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PERCPU_SECTION(L1_CACHE_BYTES) |
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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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#ifdef CONFIG_ARM_KERNMEM_PERMS |
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. = ALIGN(1<<SECTION_SHIFT); |
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#else |
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. = ALIGN(THREAD_SIZE); |
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#endif |
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__init_end = .; |
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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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_sdata = .; |
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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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INIT_TASK_DATA(THREAD_SIZE) |
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#ifdef CONFIG_XIP_KERNEL |
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. = ALIGN(PAGE_SIZE); |
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__init_begin = .; |
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INIT_DATA |
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ARM_EXIT_KEEP(EXIT_DATA) |
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. = ALIGN(PAGE_SIZE); |
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__init_end = .; |
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#endif |
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NOSAVE_DATA |
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CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES) |
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READ_MOSTLY_DATA(L1_CACHE_BYTES) |
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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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#ifdef CONFIG_HAVE_TCM |
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/* |
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* We align everything to a page boundary so we can |
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* free it after init has commenced and TCM contents have |
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* been copied to its destination. |
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*/ |
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.tcm_start : { |
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. = ALIGN(PAGE_SIZE); |
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__tcm_start = .; |
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__itcm_start = .; |
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} |
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/* |
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* Link these to the ITCM RAM |
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* Put VMA to the TCM address and LMA to the common RAM |
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* and we'll upload the contents from RAM to TCM and free |
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* the used RAM after that. |
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*/ |
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.text_itcm ITCM_OFFSET : AT(__itcm_start) |
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{ |
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__sitcm_text = .; |
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*(.tcm.text) |
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*(.tcm.rodata) |
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. = ALIGN(4); |
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__eitcm_text = .; |
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} |
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/* |
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* Reset the dot pointer, this is needed to create the |
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* relative __dtcm_start below (to be used as extern in code). |
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*/ |
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. = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm); |
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.dtcm_start : { |
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__dtcm_start = .; |
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} |
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/* TODO: add remainder of ITCM as well, that can be used for data! */ |
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.data_dtcm DTCM_OFFSET : AT(__dtcm_start) |
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{ |
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. = ALIGN(4); |
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__sdtcm_data = .; |
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*(.tcm.data) |
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. = ALIGN(4); |
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__edtcm_data = .; |
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} |
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/* Reset the dot pointer or the linker gets confused */ |
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. = ADDR(.dtcm_start) + SIZEOF(.data_dtcm); |
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/* End marker for freeing TCM copy in linked object */ |
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.tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){ |
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. = ALIGN(PAGE_SIZE); |
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__tcm_end = .; |
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} |
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#endif |
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BSS_SECTION(0, 0, 0) |
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_end = .; |
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STABS_DEBUG |
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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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/* |
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* The HYP init code can't be more than a page long, |
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* and should not cross a page boundary. |
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* The above comment applies as well. |
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*/ |
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ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & PAGE_MASK) <= PAGE_SIZE, |
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"HYP init code too big or misaligned")
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