diff options
Diffstat (limited to 'arch/s390/kernel/vmlinux.lds.S')
| -rw-r--r-- | arch/s390/kernel/vmlinux.lds.S | 223 |
1 files changed, 193 insertions, 30 deletions
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S index 6e2c42bd1c3b..53bcbb91bb9b 100644 --- a/arch/s390/kernel/vmlinux.lds.S +++ b/arch/s390/kernel/vmlinux.lds.S @@ -1,24 +1,34 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* ld script to make s390 Linux kernel * Written by Martin Schwidefsky (schwidefsky@de.ibm.com) */ #include <asm/thread_info.h> #include <asm/page.h> +#include <asm/ftrace.lds.h> /* * Put .bss..swapper_pg_dir as the first thing in .bss. This will * make sure it has 16k alignment. */ -#define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir) +#define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir) \ + *(.bss..invalid_pg_dir) + +#define RO_EXCEPTION_TABLE_ALIGN 16 /* Handle ro_after_init data on our own. */ #define RO_AFTER_INIT_DATA +#define RUNTIME_DISCARD_EXIT + +#define EMITS_PT_NOTE + #include <asm-generic/vmlinux.lds.h> +#include <asm/vmlinux.lds.h> OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390") OUTPUT_ARCH(s390:64-bit) -ENTRY(startup) +ENTRY(startup_continue) jiffies = jiffies_64; PHDRS { @@ -29,55 +39,68 @@ PHDRS { SECTIONS { - . = 0x00000000; + . = TEXT_OFFSET; .text : { - /* Text and read-only data */ + _stext = .; /* Start of text section */ + _text = .; /* Text and read-only data */ HEAD_TEXT - /* - * E.g. perf doesn't like symbols starting at address zero, - * therefore skip the initial PSW and channel program located - * at address zero and let _text start at 0x200. - */ - _text = 0x200; TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT IRQENTRY_TEXT SOFTIRQENTRY_TEXT - *(.fixup) + FTRACE_HOTPATCH_TRAMPOLINES_TEXT + *(.text..*_indirect_*) *(.gnu.warning) + . = ALIGN(PAGE_SIZE); + _etext = .; /* End of text section */ } :text = 0x0700 - . = ALIGN(PAGE_SIZE); - _etext = .; /* End of text section */ - - NOTES :text :note - - .dummy : { *(.dummy) } :data - - RO_DATA_SECTION(PAGE_SIZE) - -#ifdef CONFIG_SHARED_KERNEL - . = ALIGN(0x100000); /* VM shared segments are 1MB aligned */ -#endif + RO_DATA(PAGE_SIZE) . = ALIGN(PAGE_SIZE); - _eshared = .; /* End of shareable data */ _sdata = .; /* Start of data section */ . = ALIGN(PAGE_SIZE); __start_ro_after_init = .; .data..ro_after_init : { *(.data..ro_after_init) - } - EXCEPTION_TABLE(16) + JUMP_TABLE_DATA + } :data . = ALIGN(PAGE_SIZE); __end_ro_after_init = .; - RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE) + . = ALIGN(8); + .skey_region_table : { + __skey_region_start = .; + KEEP(*(.skey_region)) + __skey_region_end = .; + } + + .data.rel.ro : { + *(.data.rel.ro .data.rel.ro.*) + } + .got : { + __got_start = .; + *(.got) + __got_end = .; + } + RW_DATA(0x100, PAGE_SIZE, THREAD_SIZE) + .data.rel : { + *(.data.rel*) + } + BOOT_DATA_PRESERVED + + . = ALIGN(8); + .amode31.refs : { + _start_amode31_refs = .; + *(.amode31.refs) + _end_amode31_refs = .; + } + + . = ALIGN(PAGE_SIZE); _edata = .; /* End of data section */ /* will be freed after init */ @@ -86,10 +109,10 @@ SECTIONS . = ALIGN(PAGE_SIZE); .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { - VMLINUX_SYMBOL(_sinittext) = . ; + _sinittext = .; INIT_TEXT . = ALIGN(PAGE_SIZE); - VMLINUX_SYMBOL(_einittext) = . ; + _einittext = .; } /* @@ -104,22 +127,162 @@ SECTIONS EXIT_DATA } + /* + * struct alt_inst entries. From the header (alternative.h): + * "Alternative instructions for different CPU types or capabilities" + * Think locking instructions on spinlocks. + * Note, that it is a part of __init region. + */ + . = ALIGN(8); + .altinstructions : { + __alt_instructions = .; + *(.altinstructions) + __alt_instructions_end = .; + } + + /* + * And here are the replacement instructions. The linker sticks + * them as binary blobs. The .altinstructions has enough data to + * get the address and the length of them to patch the kernel safely. + * Note, that it is a part of __init region. + */ + .altinstr_replacement : { + *(.altinstr_replacement) + } + +#ifdef CONFIG_STACKPROTECTOR + . = ALIGN(8); + .stack_prot_table : { + __stack_prot_start = .; + KEEP(*(__stack_protector_loc)) + __stack_prot_end = .; + } +#endif + + /* + * Table with the patch locations to undo expolines + */ + . = ALIGN(4); + .nospec_call_table : { + __nospec_call_start = . ; + *(.s390_indirect*) + __nospec_call_end = . ; + } + .nospec_return_table : { + __nospec_return_start = . ; + *(.s390_return*) + __nospec_return_end = . ; + } + + BOOT_DATA + + /* + * .amode31 section for code, data, ex_table that need to stay + * below 2 GB, even when the kernel is relocated above 2 GB. + */ + . = ALIGN(PAGE_SIZE); + _samode31 = .; + .amode31.text : { + _stext_amode31 = .; + *(.amode31.text) + *(.amode31.text.*_indirect_*) + . = ALIGN(PAGE_SIZE); + _etext_amode31 = .; + } + . = ALIGN(16); + .amode31.ex_table : { + _start_amode31_ex_table = .; + KEEP(*(.amode31.ex_table)) + _stop_amode31_ex_table = .; + } + . = ALIGN(PAGE_SIZE); + .amode31.data : { + *(.amode31.data) + } + . = _samode31 + AMODE31_SIZE; + _eamode31 = .; + /* early.c uses stsi, which requires page aligned data. */ . = ALIGN(PAGE_SIZE); INIT_DATA_SECTION(0x100) + RUNTIME_CONST_VARIABLES + PERCPU_SECTION(0x100) + . = ALIGN(PAGE_SIZE); __init_end = .; /* freed after init ends here */ BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE) + . = ALIGN(PAGE_SIZE); _end = . ; /* Debugging sections. */ STABS_DEBUG DWARF_DEBUG + ELF_DETAILS + + /* + * Make sure that the .got.plt is either completely empty or it + * contains only the three reserved double words. + */ + .got.plt : { + *(.got.plt) + } + ASSERT(SIZEOF(.got.plt) == 0 || SIZEOF(.got.plt) == 0x18, "Unexpected GOT/PLT entries detected!") + + /* + * Sections that should stay zero sized, which is safer to + * explicitly check instead of blindly discarding. + */ + .plt : { + *(.plt) *(.plt.*) *(.iplt) *(.igot .igot.plt) + } + ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!") + .rela.dyn : { + *(.rela.*) *(.rela_*) + } + ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!") + + /* + * uncompressed image info used by the decompressor + * it should match struct vmlinux_info + */ + .vmlinux.info 0 (INFO) : { + QUAD(startup_continue) /* entry */ + QUAD(__bss_start - _stext) /* image_size */ + QUAD(__bss_stop - __bss_start) /* bss_size */ + QUAD(__boot_data_start) /* bootdata_off */ + QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */ + QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */ + QUAD(__boot_data_preserved_end - + __boot_data_preserved_start) /* bootdata_preserved_size */ + QUAD(__got_start) /* got_start */ + QUAD(__got_end) /* got_end */ + QUAD(_eamode31 - _samode31) /* amode31_size */ + QUAD(init_mm) + QUAD(swapper_pg_dir) + QUAD(invalid_pg_dir) + QUAD(__alt_instructions) + QUAD(__alt_instructions_end) +#ifdef CONFIG_STACKPROTECTOR + QUAD(__stack_prot_start) + QUAD(__stack_prot_end) +#endif +#ifdef CONFIG_KASAN + QUAD(kasan_early_shadow_page) + QUAD(kasan_early_shadow_pte) + QUAD(kasan_early_shadow_pmd) + QUAD(kasan_early_shadow_pud) + QUAD(kasan_early_shadow_p4d) +#endif + } :NONE /* Sections to be discarded */ DISCARDS + /DISCARD/ : { + *(.eh_frame) + *(.interp) + } } |