/* SPDX-License-Identifier: GPL-2.0 */ /* ld script to make s390 Linux kernel * Written by Martin Schwidefsky (schwidefsky@de.ibm.com) */ #include #include /* * 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) /* Handle ro_after_init data on our own. */ #define RO_AFTER_INIT_DATA #include #include OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390") OUTPUT_ARCH(s390:64-bit) ENTRY(startup_continue) jiffies = jiffies_64; PHDRS { text PT_LOAD FLAGS(5); /* R_E */ data PT_LOAD FLAGS(7); /* RWE */ note PT_NOTE FLAGS(0); /* ___ */ } SECTIONS { . = 0x100000; _stext = .; /* Start of text section */ .text : { /* Text and read-only data */ _text = .; HEAD_TEXT TEXT_TEXT SCHED_TEXT CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT IRQENTRY_TEXT SOFTIRQENTRY_TEXT *(.text.*_indirect_*) *(.fixup) *(.gnu.warning) } :text = 0x0700 . = ALIGN(PAGE_SIZE); _etext = .; /* End of text section */ NOTES :text :note .dummy : { *(.dummy) } :data RO_DATA_SECTION(PAGE_SIZE) . = ALIGN(PAGE_SIZE); _sdata = .; /* Start of data section */ . = ALIGN(PAGE_SIZE); __start_ro_after_init = .; .data..ro_after_init : { *(.data..ro_after_init) } EXCEPTION_TABLE(16) . = ALIGN(PAGE_SIZE); __end_ro_after_init = .; RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE) _edata = .; /* End of data section */ /* will be freed after init */ . = ALIGN(PAGE_SIZE); /* Init code and data */ __init_begin = .; . = ALIGN(PAGE_SIZE); .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { _sinittext = .; INIT_TEXT . = ALIGN(PAGE_SIZE); _einittext = .; } /* * .exit.text is discarded at runtime, not link time, * to deal with references from __bug_table */ .exit.text : { EXIT_TEXT } .exit.data : { 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) } /* * Table with the patch locations to undo expolines */ .nospec_call_table : { __nospec_call_start = . ; *(.s390_indirect*) __nospec_call_end = . ; } .nospec_return_table : { __nospec_return_start = . ; *(.s390_return*) __nospec_return_end = . ; } BOOT_DATA /* early.c uses stsi, which requires page aligned data. */ . = ALIGN(PAGE_SIZE); INIT_DATA_SECTION(0x100) PERCPU_SECTION(0x100) . = ALIGN(PAGE_SIZE); __init_end = .; /* freed after init ends here */ BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE) _end = . ; /* * uncompressed image info used by the decompressor * it should match struct vmlinux_info */ .vmlinux.info 0 : { QUAD(_stext) /* default_lma */ 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 */ } /* Debugging sections. */ STABS_DEBUG DWARF_DEBUG /* Sections to be discarded */ DISCARDS /DISCARD/ : { *(.eh_frame) } }