diff options
Diffstat (limited to 'arch/arm64/kernel/vmlinux.lds.S')
| -rw-r--r-- | arch/arm64/kernel/vmlinux.lds.S | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S new file mode 100644 index 000000000..a2c29865c --- /dev/null +++ b/arch/arm64/kernel/vmlinux.lds.S @@ -0,0 +1,179 @@ +/* + * ld script to make ARM Linux kernel + * taken from the i386 version by Russell King + * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz> + */ + +#include <asm-generic/vmlinux.lds.h> +#include <asm/thread_info.h> +#include <asm/memory.h> +#include <asm/page.h> +#include <asm/pgtable.h> + +#include "image.h" + +/* .exit.text needed in case of alternative patching */ +#define ARM_EXIT_KEEP(x) x +#define ARM_EXIT_DISCARD(x) + +OUTPUT_ARCH(aarch64) +ENTRY(_text) + +jiffies = jiffies_64; + +#define HYPERVISOR_TEXT \ + /* \ + * Align to 4 KB so that \ + * a) the HYP vector table is at its minimum \ + * alignment of 2048 bytes \ + * b) the HYP init code will not cross a page \ + * boundary if its size does not exceed \ + * 4 KB (see related ASSERT() below) \ + */ \ + . = ALIGN(SZ_4K); \ + VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \ + *(.hyp.idmap.text) \ + VMLINUX_SYMBOL(__hyp_idmap_text_end) = .; \ + VMLINUX_SYMBOL(__hyp_text_start) = .; \ + *(.hyp.text) \ + VMLINUX_SYMBOL(__hyp_text_end) = .; + +/* + * The size of the PE/COFF section that covers the kernel image, which + * runs from stext to _edata, must be a round multiple of the PE/COFF + * FileAlignment, which we set to its minimum value of 0x200. 'stext' + * itself is 4 KB aligned, so padding out _edata to a 0x200 aligned + * boundary should be sufficient. + */ +PECOFF_FILE_ALIGNMENT = 0x200; + +#ifdef CONFIG_EFI +#define PECOFF_EDATA_PADDING \ + .pecoff_edata_padding : { BYTE(0); . = ALIGN(PECOFF_FILE_ALIGNMENT); } +#else +#define PECOFF_EDATA_PADDING +#endif + +#ifdef CONFIG_DEBUG_ALIGN_RODATA +#define ALIGN_DEBUG_RO . = ALIGN(1<<SECTION_SHIFT); +#define ALIGN_DEBUG_RO_MIN(min) ALIGN_DEBUG_RO +#else +#define ALIGN_DEBUG_RO +#define ALIGN_DEBUG_RO_MIN(min) . = ALIGN(min); +#endif + +SECTIONS +{ + /* + * XXX: The linker does not define how output sections are + * assigned to input sections when there are multiple statements + * matching the same input section name. There is no documented + * order of matching. + */ + /DISCARD/ : { + ARM_EXIT_DISCARD(EXIT_TEXT) + ARM_EXIT_DISCARD(EXIT_DATA) + EXIT_CALL + *(.discard) + *(.discard.*) + } + + . = PAGE_OFFSET + TEXT_OFFSET; + + .head.text : { + _text = .; + HEAD_TEXT + } + ALIGN_DEBUG_RO + .text : { /* Real text segment */ + _stext = .; /* Text and read-only data */ + __exception_text_start = .; + *(.exception.text) + __exception_text_end = .; + IRQENTRY_TEXT + TEXT_TEXT + SCHED_TEXT + LOCK_TEXT + HYPERVISOR_TEXT + *(.fixup) + *(.gnu.warning) + . = ALIGN(16); + *(.got) /* Global offset table */ + } + + ALIGN_DEBUG_RO + RO_DATA(PAGE_SIZE) + EXCEPTION_TABLE(8) + NOTES + ALIGN_DEBUG_RO + _etext = .; /* End of text and rodata section */ + + ALIGN_DEBUG_RO_MIN(PAGE_SIZE) + __init_begin = .; + + INIT_TEXT_SECTION(8) + .exit.text : { + ARM_EXIT_KEEP(EXIT_TEXT) + } + + ALIGN_DEBUG_RO_MIN(16) + .init.data : { + INIT_DATA + INIT_SETUP(16) + INIT_CALLS + CON_INITCALL + SECURITY_INITCALL + INIT_RAM_FS + } + .exit.data : { + ARM_EXIT_KEEP(EXIT_DATA) + } + + PERCPU_SECTION(64) + + . = ALIGN(PAGE_SIZE); + __init_end = .; + + . = ALIGN(4); + .altinstructions : { + __alt_instructions = .; + *(.altinstructions) + __alt_instructions_end = .; + } + .altinstr_replacement : { + *(.altinstr_replacement) + } + + . = ALIGN(PAGE_SIZE); + _data = .; + _sdata = .; + RW_DATA_SECTION(64, PAGE_SIZE, THREAD_SIZE) + PECOFF_EDATA_PADDING + _edata = .; + + BSS_SECTION(0, 0, 0) + + . = ALIGN(PAGE_SIZE); + idmap_pg_dir = .; + . += IDMAP_DIR_SIZE; + swapper_pg_dir = .; + . += SWAPPER_DIR_SIZE; + + _end = .; + + STABS_DEBUG + + HEAD_SYMBOLS +} + +/* + * The HYP init code can't be more than a page long, + * and should not cross a page boundary. + */ +ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & ~(SZ_4K - 1)) <= SZ_4K, + "HYP init code too big or misaligned") + +/* + * If padding is applied before .head.text, virt<->phys conversions will fail. + */ +ASSERT(_text == (PAGE_OFFSET + TEXT_OFFSET), "HEAD is misaligned") |