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
20 #include <asm-generic/vmlinux.lds.h>
21 #include <asm/vmlinux.lds.h>
23 OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
24 OUTPUT_ARCH(s390:64-bit)
25 ENTRY(startup_continue)
29 text PT_LOAD FLAGS(5); /* R_E */
30 data PT_LOAD FLAGS(7); /* RWE */
31 note PT_NOTE FLAGS(0); /* ___ */
38 _stext = .; /* Start of text section */
39 _text = .; /* Text and read-only data */
52 _etext = .; /* End of text section */
58 _sdata = .; /* Start of data section */
61 __start_ro_after_init = .;
62 .data..ro_after_init : {
63 *(.data..ro_after_init)
68 __end_ro_after_init = .;
70 RW_DATA(0x100, PAGE_SIZE, THREAD_SIZE)
73 _edata = .; /* End of data section */
75 /* will be freed after init */
76 . = ALIGN(PAGE_SIZE); /* Init code and data */
80 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
88 * .exit.text is discarded at runtime, not link time,
89 * to deal with references from __bug_table
100 * struct alt_inst entries. From the header (alternative.h):
101 * "Alternative instructions for different CPU types or capabilities"
102 * Think locking instructions on spinlocks.
103 * Note, that it is a part of __init region.
107 __alt_instructions = .;
109 __alt_instructions_end = .;
113 * And here are the replacement instructions. The linker sticks
114 * them as binary blobs. The .altinstructions has enough data to
115 * get the address and the length of them to patch the kernel safely.
116 * Note, that it is a part of __init region.
118 .altinstr_replacement : {
119 *(.altinstr_replacement)
123 * 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 = . ;
138 /* early.c uses stsi, which requires page aligned data. */
139 . = ALIGN(PAGE_SIZE);
140 INIT_DATA_SECTION(0x100)
142 PERCPU_SECTION(0x100)
149 .rela.dyn ALIGN(8) : {
150 __rela_dyn_start = .;
155 . = ALIGN(PAGE_SIZE);
156 __init_end = .; /* freed after init ends here */
158 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE)
163 * uncompressed image info used by the decompressor
164 * it should match struct vmlinux_info
166 .vmlinux.info 0 (INFO) : {
167 QUAD(_stext) /* default_lma */
168 QUAD(startup_continue) /* entry */
169 QUAD(__bss_start - _stext) /* image_size */
170 QUAD(__bss_stop - __bss_start) /* bss_size */
171 QUAD(__boot_data_start) /* bootdata_off */
172 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */
173 QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */
174 QUAD(__boot_data_preserved_end -
175 __boot_data_preserved_start) /* bootdata_preserved_size */
176 QUAD(__dynsym_start) /* dynsym_start */
177 QUAD(__rela_dyn_start) /* rela_dyn_start */
178 QUAD(__rela_dyn_end) /* rela_dyn_end */
181 /* Debugging sections. */
185 /* Sections to be discarded */