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>
8 #include <asm/ftrace.lds.h>
11 * Put .bss..swapper_pg_dir as the first thing in .bss. This will
12 * make sure it has 16k alignment.
14 #define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir) \
15 *(.bss..invalid_pg_dir)
17 #define RO_EXCEPTION_TABLE_ALIGN 16
19 /* Handle ro_after_init data on our own. */
20 #define RO_AFTER_INIT_DATA
22 #define RUNTIME_DISCARD_EXIT
26 #include <asm-generic/vmlinux.lds.h>
27 #include <asm/vmlinux.lds.h>
29 OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
30 OUTPUT_ARCH(s390:64-bit)
31 ENTRY(startup_continue)
35 text PT_LOAD FLAGS(5); /* R_E */
36 data PT_LOAD FLAGS(7); /* RWE */
37 note PT_NOTE FLAGS(0); /* ___ */
44 _stext = .; /* Start of text section */
45 _text = .; /* Text and read-only data */
53 FTRACE_HOTPATCH_TRAMPOLINES_TEXT
57 _etext = .; /* End of text section */
63 _sdata = .; /* Start of data section */
66 __start_ro_after_init = .;
67 .data..ro_after_init : {
68 *(.data..ro_after_init)
72 __end_ro_after_init = .;
74 RW_DATA(0x100, PAGE_SIZE, THREAD_SIZE)
79 _start_amode31_refs = .;
81 _end_amode31_refs = .;
85 _edata = .; /* End of data section */
87 /* will be freed after init */
88 . = ALIGN(PAGE_SIZE); /* Init code and data */
92 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
100 * .exit.text is discarded at runtime, not link time,
101 * to deal with references from __bug_table
112 * struct alt_inst entries. From the header (alternative.h):
113 * "Alternative instructions for different CPU types or capabilities"
114 * Think locking instructions on spinlocks.
115 * Note, that it is a part of __init region.
119 __alt_instructions = .;
121 __alt_instructions_end = .;
125 * And here are the replacement instructions. The linker sticks
126 * them as binary blobs. The .altinstructions has enough data to
127 * get the address and the length of them to patch the kernel safely.
128 * Note, that it is a part of __init region.
130 .altinstr_replacement : {
131 *(.altinstr_replacement)
135 * Table with the patch locations to undo expolines
138 .nospec_call_table : {
139 __nospec_call_start = . ;
141 __nospec_call_end = . ;
143 .nospec_return_table : {
144 __nospec_return_start = . ;
146 __nospec_return_end = . ;
152 * .amode31 section for code, data, ex_table that need to stay
153 * below 2 GB, even when the kernel is relocated above 2 GB.
155 . = ALIGN(PAGE_SIZE);
160 *(.amode31.text.*_indirect_*)
161 . = ALIGN(PAGE_SIZE);
165 .amode31.ex_table : {
166 _start_amode31_ex_table = .;
167 KEEP(*(.amode31.ex_table))
168 _stop_amode31_ex_table = .;
170 . = ALIGN(PAGE_SIZE);
174 . = ALIGN(PAGE_SIZE);
177 /* early.c uses stsi, which requires page aligned data. */
178 . = ALIGN(PAGE_SIZE);
179 INIT_DATA_SECTION(0x100)
181 PERCPU_SECTION(0x100)
188 .rela.dyn ALIGN(8) : {
189 __rela_dyn_start = .;
194 . = ALIGN(PAGE_SIZE);
195 __init_end = .; /* freed after init ends here */
197 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE)
199 . = ALIGN(PAGE_SIZE);
203 * uncompressed image info used by the decompressor
204 * it should match struct vmlinux_info
206 .vmlinux.info 0 (INFO) : {
207 QUAD(_stext) /* default_lma */
208 QUAD(startup_continue) /* entry */
209 QUAD(__bss_start - _stext) /* image_size */
210 QUAD(__bss_stop - __bss_start) /* bss_size */
211 QUAD(__boot_data_start) /* bootdata_off */
212 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */
213 QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */
214 QUAD(__boot_data_preserved_end -
215 __boot_data_preserved_start) /* bootdata_preserved_size */
216 QUAD(__dynsym_start) /* dynsym_start */
217 QUAD(__rela_dyn_start) /* rela_dyn_start */
218 QUAD(__rela_dyn_end) /* rela_dyn_end */
219 QUAD(_eamode31 - _samode31) /* amode31_size */
224 QUAD(kasan_early_shadow_page)
225 QUAD(kasan_early_shadow_pte)
226 QUAD(kasan_early_shadow_pmd)
227 QUAD(kasan_early_shadow_pud)
228 QUAD(kasan_early_shadow_p4d)
232 /* Debugging sections. */
237 /* Sections to be discarded */