1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* ld script to make s390 Linux kernel
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
58 _etext = .; /* End of text section */
64 _sdata = .; /* Start of data section */
67 __start_ro_after_init = .;
68 .data..ro_after_init : {
69 *(.data..ro_after_init)
73 __end_ro_after_init = .;
76 *(.data.rel.ro .data.rel.ro.*)
84 RW_DATA(0x100, PAGE_SIZE, THREAD_SIZE)
92 _start_amode31_refs = .;
94 _end_amode31_refs = .;
98 _edata = .; /* End of data section */
100 /* will be freed after init */
101 . = ALIGN(PAGE_SIZE); /* Init code and data */
104 . = ALIGN(PAGE_SIZE);
105 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
108 . = ALIGN(PAGE_SIZE);
113 * .exit.text is discarded at runtime, not link time,
114 * to deal with references from __bug_table
125 * struct alt_inst entries. From the header (alternative.h):
126 * "Alternative instructions for different CPU types or capabilities"
127 * Think locking instructions on spinlocks.
128 * Note, that it is a part of __init region.
132 __alt_instructions = .;
134 __alt_instructions_end = .;
138 * And here are the replacement instructions. The linker sticks
139 * them as binary blobs. The .altinstructions has enough data to
140 * get the address and the length of them to patch the kernel safely.
141 * Note, that it is a part of __init region.
143 .altinstr_replacement : {
144 *(.altinstr_replacement)
148 * Table with the patch locations to undo expolines
151 .nospec_call_table : {
152 __nospec_call_start = . ;
154 __nospec_call_end = . ;
156 .nospec_return_table : {
157 __nospec_return_start = . ;
159 __nospec_return_end = . ;
165 * .amode31 section for code, data, ex_table that need to stay
166 * below 2 GB, even when the kernel is relocated above 2 GB.
168 . = ALIGN(PAGE_SIZE);
173 *(.amode31.text.*_indirect_*)
174 . = ALIGN(PAGE_SIZE);
178 .amode31.ex_table : {
179 _start_amode31_ex_table = .;
180 KEEP(*(.amode31.ex_table))
181 _stop_amode31_ex_table = .;
183 . = ALIGN(PAGE_SIZE);
187 . = _samode31 + AMODE31_SIZE;
190 /* early.c uses stsi, which requires page aligned data. */
191 . = ALIGN(PAGE_SIZE);
192 INIT_DATA_SECTION(0x100)
194 RUNTIME_CONST_VARIABLES
196 PERCPU_SECTION(0x100)
198 . = ALIGN(PAGE_SIZE);
199 __init_end = .; /* freed after init ends here */
201 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE)
203 . = ALIGN(PAGE_SIZE);
207 * uncompressed image info used by the decompressor
208 * it should match struct vmlinux_info
210 .vmlinux.info 0 (INFO) : {
211 QUAD(startup_continue) /* entry */
212 QUAD(__bss_start - _stext) /* image_size */
213 QUAD(__bss_stop - __bss_start) /* bss_size */
214 QUAD(__boot_data_start) /* bootdata_off */
215 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */
216 QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */
217 QUAD(__boot_data_preserved_end -
218 __boot_data_preserved_start) /* bootdata_preserved_size */
219 QUAD(__got_start) /* got_start */
220 QUAD(__got_end) /* got_end */
221 QUAD(_eamode31 - _samode31) /* amode31_size */
225 QUAD(__alt_instructions)
226 QUAD(__alt_instructions_end)
228 QUAD(kasan_early_shadow_page)
229 QUAD(kasan_early_shadow_pte)
230 QUAD(kasan_early_shadow_pmd)
231 QUAD(kasan_early_shadow_pud)
232 QUAD(kasan_early_shadow_p4d)
236 /* Debugging sections. */
242 * Make sure that the .got.plt is either completely empty or it
243 * contains only the three reserved double words.
248 ASSERT(SIZEOF(.got.plt) == 0 || SIZEOF(.got.plt) == 0x18, "Unexpected GOT/PLT entries detected!")
251 * Sections that should stay zero sized, which is safer to
252 * explicitly check instead of blindly discarding.
255 *(.plt) *(.plt.*) *(.iplt) *(.igot .igot.plt)
257 ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!")
259 *(.rela.*) *(.rela_*)
261 ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!")
263 /* Sections to be discarded */