1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* ld script to make s390 Linux kernel
3 * Written by Martin Schwidefsky (schwidefsky@de.ibm.com)
6 #include <asm/thread_info.h>
10 * Put .bss..swapper_pg_dir as the first thing in .bss. This will
11 * make sure it has 16k alignment.
13 #define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir)
15 /* Handle ro_after_init data on our own. */
16 #define RO_AFTER_INIT_DATA
18 #include <asm-generic/vmlinux.lds.h>
20 OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
21 OUTPUT_ARCH(s390:64-bit)
22 ENTRY(startup_continue)
26 text PT_LOAD FLAGS(5); /* R_E */
27 data PT_LOAD FLAGS(7); /* RWE */
28 note PT_NOTE FLAGS(0); /* ___ */
35 _stext = .; /* Start of text section */
36 _text = .; /* Text and read-only data */
49 _etext = .; /* End of text section */
54 .dummy : { *(.dummy) } :data
56 RO_DATA_SECTION(PAGE_SIZE)
59 _sdata = .; /* Start of data section */
62 __start_ro_after_init = .;
63 .data..ro_after_init : {
64 *(.data..ro_after_init)
68 __end_ro_after_init = .;
70 RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE)
72 _edata = .; /* End of data section */
74 /* will be freed after init */
75 . = ALIGN(PAGE_SIZE); /* Init code and data */
79 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
87 * .exit.text is discarded at runtime, not link time,
88 * to deal with references from __bug_table
99 * struct alt_inst entries. From the header (alternative.h):
100 * "Alternative instructions for different CPU types or capabilities"
101 * Think locking instructions on spinlocks.
102 * Note, that it is a part of __init region.
106 __alt_instructions = .;
108 __alt_instructions_end = .;
112 * And here are the replacement instructions. The linker sticks
113 * them as binary blobs. The .altinstructions has enough data to
114 * get the address and the length of them to patch the kernel safely.
115 * Note, that it is a part of __init region.
117 .altinstr_replacement : {
118 *(.altinstr_replacement)
122 * Table with the patch locations to undo expolines
125 .nospec_call_table : {
126 __nospec_call_start = . ;
128 __nospec_call_end = . ;
130 .nospec_return_table : {
131 __nospec_return_start = . ;
133 __nospec_return_end = . ;
136 /* early.c uses stsi, which requires page aligned data. */
137 . = ALIGN(PAGE_SIZE);
138 INIT_DATA_SECTION(0x100)
140 PERCPU_SECTION(0x100)
141 . = ALIGN(PAGE_SIZE);
142 __init_end = .; /* freed after init ends here */
144 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE)
148 /* Debugging sections. */
152 /* Sections to be discarded */