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kern.ldscript revision 1.8 
      1 #include "assym.h"
      2 
      3 /* Default linker script, for normal executables */
      4 OUTPUT_FORMAT("elf64-littleaarch64", "elf64-bigaarch64",
      5 	      "elf64-littleaarch64")
      6 OUTPUT_ARCH(aarch64)
      7 ENTRY(_start)
      8 
      9 SECTIONS
     10 {
     11 	.text :
     12 	{
     13 		PROVIDE (__kernel_text = .);
     14 		PROVIDE_HIDDEN (__eprol = .);
     15 		*(.text)
     16 		*(.text.unlikely .text.*_unlikely)
     17 		*(.text.exit .text.exit.*)
     18 		*(.text.startup .text.startup.*)
     19 		*(.text.hot .text.hot.*)
     20 		*(.stub .text.* .gnu.linkonce.t.*)
     21 		/* .gnu.warning sections are handled specially by elf32.em.  */
     22 	} =0
     23 
     24 	/* Move .rodata to the next L2 block to set unexecutable */
     25 	. = ALIGN (L2_SIZE);
     26 	PROVIDE (__rodata_start = .);
     27 	.rodata         : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
     28 	.rodata1        : { *(.rodata1) }
     29 	.eh_frame_hdr : { *(.eh_frame_hdr) }
     30 	.eh_frame       : ONLY_IF_RO { KEEP (*(.eh_frame)) }
     31 	.gcc_except_table   : ONLY_IF_RO { *(.gcc_except_table
     32 	.gcc_except_table.*) }
     33 
     34 	/* These sections are generated by the Sun/Oracle C++ compiler.  */
     35 	.exception_ranges   : ONLY_IF_RO { *(.exception_ranges
     36 	.exception_ranges*) }
     37 	PROVIDE (__etext = .);
     38 	PROVIDE (_etext = .);
     39 	PROVIDE (etext = .);
     40 
     41 	/*
     42 	 * Adjust the address for the data segment. Move .data to the next
     43 	 * L2 block, and .text and .rodata will be set readonly if needed.
     44 	 */
     45 	PROVIDE (_erodata = .);
     46 	. = ALIGN (L2_SIZE);
     47 	. = DATA_SEGMENT_ALIGN (CONSTANT (MAXPAGESIZE), CONSTANT (COMMONPAGESIZE));
     48 	/* Exception handling  */
     49 	.eh_frame       : ONLY_IF_RW { KEEP (*(.eh_frame)) }
     50 	.gcc_except_table   : ONLY_IF_RW { *(.gcc_except_table .gcc_except_table.*) }
     51 	.exception_ranges   : ONLY_IF_RW { *(.exception_ranges .exception_ranges*) }
     52 	.got            : { *(.got) *(.igot) }
     53 	. = DATA_SEGMENT_RELRO_END (24, .);
     54 	.got.plt        : { *(.got.plt)  *(.igot.plt) }
     55 	.data           :
     56 	{
     57 		PROVIDE (__data_start = .);
     58 		*(.data .gnu.linkonce.d.*)
     59 		SORT(CONSTRUCTORS)
     60 	}
     61 	.data1          : { *(.data1) }
     62 
     63 	. = ALIGN(64);	/* COHERENCY_UNIT */
     64 	.data.cacheline_aligned :
     65 	{
     66 		*(.data.cacheline_aligned)
     67 	}
     68 	. = ALIGN(64);	/* COHERENCY_UNIT */
     69 	.data.read_mostly :
     70 	{
     71 		*(.data.read_mostly)
     72 	}
     73 	. = ALIGN(64);	/* COHERENCY_UNIT */
     74 
     75 	_edata = .; PROVIDE (edata = .);
     76 	. = .;
     77 
     78 	__bss_start = .;
     79 	__bss_start__ = .;
     80 	.bss :
     81 	{
     82 		*(.dynbss)
     83 		*(.bss .bss.* .gnu.linkonce.b.*)
     84 		*(COMMON)
     85 
     86 		/*
     87 		 * Align here to ensure that the .bss section occupies space
     88 		 * up to _end. Align after .bss to ensure correct alignment
     89 		 * even if the .bss section disappears because there are no
     90 		 * input sections.
     91 		 *
     92 		 * FIXME: Why do we need it? When there is no .bss section,
     93 		 * we don't pad the .data section.
     94 		 */
     95 		. = ALIGN(. != 0 ? 32 / 8 : 1);
     96 	}
     97 	_bss_end__ = . ; __bss_end__ = . ;
     98 	. = ALIGN(32 / 8);
     99 	. = ALIGN(32 / 8);
    100 
    101 	__end__ = . ;
    102 	_end = .; PROVIDE (end = .);
    103 	. = DATA_SEGMENT_END (.);
    104 	.ARM.attributes 0 : { KEEP (*(.ARM.attributes)) KEEP (*(.gnu.attributes)) }
    105 	.note.gnu.arm.ident 0 : { KEEP (*(.note.gnu.arm.ident)) }
    106 }
    107