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>
19 #include <asm/vmlinux.lds.h>
21 OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
22 OUTPUT_ARCH(s390:64-bit)
23 ENTRY(startup_continue)
27 text PT_LOAD FLAGS(5); /* R_E */
28 data PT_LOAD FLAGS(7); /* RWE */
29 note PT_NOTE FLAGS(0); /* ___ */
36 _stext = .; /* Start of text section */
37 _text = .; /* Text and read-only data */
50 _etext = .; /* End of text section */
55 .dummy : { *(.dummy) } :data
57 RO_DATA_SECTION(PAGE_SIZE)
60 _sdata = .; /* Start of data section */
63 __start_ro_after_init = .;
64 .data..ro_after_init : {
65 *(.data..ro_after_init)
70 __end_ro_after_init = .;
72 RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE)
75 _edata = .; /* End of data section */
77 /* will be freed after init */
78 . = ALIGN(PAGE_SIZE); /* Init code and data */
82 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
90 * .exit.text is discarded at runtime, not link time,
91 * to deal with references from __bug_table
102 * struct alt_inst entries. From the header (alternative.h):
103 * "Alternative instructions for different CPU types or capabilities"
104 * Think locking instructions on spinlocks.
105 * Note, that it is a part of __init region.
109 __alt_instructions = .;
111 __alt_instructions_end = .;
115 * And here are the replacement instructions. The linker sticks
116 * them as binary blobs. The .altinstructions has enough data to
117 * get the address and the length of them to patch the kernel safely.
118 * Note, that it is a part of __init region.
120 .altinstr_replacement : {
121 *(.altinstr_replacement)
125 * Table with the patch locations to undo expolines
127 .nospec_call_table : {
128 __nospec_call_start = . ;
130 __nospec_call_end = . ;
132 .nospec_return_table : {
133 __nospec_return_start = . ;
135 __nospec_return_end = . ;
140 /* early.c uses stsi, which requires page aligned data. */
141 . = ALIGN(PAGE_SIZE);
142 INIT_DATA_SECTION(0x100)
144 PERCPU_SECTION(0x100)
151 .rela.dyn ALIGN(8) : {
152 __rela_dyn_start = .;
157 . = ALIGN(PAGE_SIZE);
158 __init_end = .; /* freed after init ends here */
160 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE)
165 * uncompressed image info used by the decompressor
166 * it should match struct vmlinux_info
168 .vmlinux.info 0 (INFO) : {
169 QUAD(_stext) /* default_lma */
170 QUAD(startup_continue) /* entry */
171 QUAD(__bss_start - _stext) /* image_size */
172 QUAD(__bss_stop - __bss_start) /* bss_size */
173 QUAD(__boot_data_start) /* bootdata_off */
174 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */
175 QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */
176 QUAD(__boot_data_preserved_end -
177 __boot_data_preserved_start) /* bootdata_preserved_size */
178 QUAD(__dynsym_start) /* dynsym_start */
179 QUAD(__rela_dyn_start) /* rela_dyn_start */
180 QUAD(__rela_dyn_end) /* rela_dyn_end */
183 /* Debugging sections. */
187 /* Sections to be discarded */