1/* SPDX-License-Identifier: GPL-2.0 */
2/* ld script to make s390 Linux kernel
3 * Written by Martin Schwidefsky (schwidefsky@de.ibm.com)
4 */
5
6#include <asm/thread_info.h>
7#include <asm/page.h>
8#include <asm/ftrace.lds.h>
9
10/*
11 * Put .bss..swapper_pg_dir as the first thing in .bss. This will
12 * make sure it has 16k alignment.
13 */
14#define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir) \
15			   *(.bss..invalid_pg_dir)
16
17#define RO_EXCEPTION_TABLE_ALIGN	16
18
19/* Handle ro_after_init data on our own. */
20#define RO_AFTER_INIT_DATA
21
22#define RUNTIME_DISCARD_EXIT
23
24#define EMITS_PT_NOTE
25
26#include <asm-generic/vmlinux.lds.h>
27#include <asm/vmlinux.lds.h>
28
29OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
30OUTPUT_ARCH(s390:64-bit)
31ENTRY(startup_continue)
32jiffies = jiffies_64;
33
34PHDRS {
35	text PT_LOAD FLAGS(5);	/* R_E */
36	data PT_LOAD FLAGS(7);	/* RWE */
37	note PT_NOTE FLAGS(0);	/* ___ */
38}
39
40SECTIONS
41{
42	. = 0x100000;
43	.text : {
44		_stext = .;		/* Start of text section */
45		_text = .;		/* Text and read-only data */
46		HEAD_TEXT
47		TEXT_TEXT
48		SCHED_TEXT
49		LOCK_TEXT
50		KPROBES_TEXT
51		IRQENTRY_TEXT
52		SOFTIRQENTRY_TEXT
53		FTRACE_HOTPATCH_TRAMPOLINES_TEXT
54		*(.text.*_indirect_*)
55		*(.gnu.warning)
56		. = ALIGN(PAGE_SIZE);
57		_etext = .;		/* End of text section */
58	} :text = 0x0700
59
60	RO_DATA(PAGE_SIZE)
61
62	. = ALIGN(PAGE_SIZE);
63	_sdata = .;		/* Start of data section */
64
65	. = ALIGN(PAGE_SIZE);
66	__start_ro_after_init = .;
67	.data..ro_after_init : {
68		 *(.data..ro_after_init)
69		JUMP_TABLE_DATA
70	} :data
71	. = ALIGN(PAGE_SIZE);
72	__end_ro_after_init = .;
73
74	RW_DATA(0x100, PAGE_SIZE, THREAD_SIZE)
75	BOOT_DATA_PRESERVED
76
77	. = ALIGN(8);
78	.amode31.refs : {
79		_start_amode31_refs = .;
80		*(.amode31.refs)
81		_end_amode31_refs = .;
82	}
83
84	. = ALIGN(PAGE_SIZE);
85	_edata = .;		/* End of data section */
86
87	/* will be freed after init */
88	. = ALIGN(PAGE_SIZE);	/* Init code and data */
89	__init_begin = .;
90
91	. = ALIGN(PAGE_SIZE);
92	.init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
93		_sinittext = .;
94		INIT_TEXT
95		. = ALIGN(PAGE_SIZE);
96		_einittext = .;
97	}
98
99	/*
100	 * .exit.text is discarded at runtime, not link time,
101	 * to deal with references from __bug_table
102	*/
103	.exit.text : {
104		EXIT_TEXT
105	}
106
107	.exit.data : {
108		EXIT_DATA
109	}
110
111	/*
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.
116	 */
117	. = ALIGN(8);
118	.altinstructions : {
119		__alt_instructions = .;
120		*(.altinstructions)
121		__alt_instructions_end = .;
122	}
123
124	/*
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.
129	 */
130	.altinstr_replacement : {
131		*(.altinstr_replacement)
132	}
133
134	/*
135	 * Table with the patch locations to undo expolines
136	*/
137	. = ALIGN(4);
138	.nospec_call_table : {
139		__nospec_call_start = . ;
140		*(.s390_indirect*)
141		__nospec_call_end = . ;
142	}
143	.nospec_return_table : {
144		__nospec_return_start = . ;
145		*(.s390_return*)
146		__nospec_return_end = . ;
147	}
148
149	BOOT_DATA
150
151	/*
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.
154	 */
155	. = ALIGN(PAGE_SIZE);
156	_samode31 = .;
157	.amode31.text : {
158		_stext_amode31 = .;
159		*(.amode31.text)
160		*(.amode31.text.*_indirect_*)
161		. = ALIGN(PAGE_SIZE);
162		_etext_amode31 = .;
163	}
164	. = ALIGN(16);
165	.amode31.ex_table : {
166		_start_amode31_ex_table = .;
167		KEEP(*(.amode31.ex_table))
168		_stop_amode31_ex_table = .;
169	}
170	. = ALIGN(PAGE_SIZE);
171	.amode31.data : {
172		*(.amode31.data)
173	}
174	. = ALIGN(PAGE_SIZE);
175	_eamode31 = .;
176
177	/* early.c uses stsi, which requires page aligned data. */
178	. = ALIGN(PAGE_SIZE);
179	INIT_DATA_SECTION(0x100)
180
181	PERCPU_SECTION(0x100)
182
183	.dynsym ALIGN(8) : {
184		__dynsym_start = .;
185		*(.dynsym)
186		__dynsym_end = .;
187	}
188	.rela.dyn ALIGN(8) : {
189		__rela_dyn_start = .;
190		*(.rela*)
191		__rela_dyn_end = .;
192	}
193
194	. = ALIGN(PAGE_SIZE);
195	__init_end = .;		/* freed after init ends here */
196
197	BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE)
198
199	. = ALIGN(PAGE_SIZE);
200	_end = . ;
201
202	/*
203	 * uncompressed image info used by the decompressor
204	 * it should match struct vmlinux_info
205	 */
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 */
220		QUAD(init_mm)
221		QUAD(swapper_pg_dir)
222		QUAD(invalid_pg_dir)
223#ifdef CONFIG_KASAN
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)
229#endif
230	} :NONE
231
232	/* Debugging sections.	*/
233	STABS_DEBUG
234	DWARF_DEBUG
235	ELF_DETAILS
236
237	/* Sections to be discarded */
238	DISCARDS
239	/DISCARD/ : {
240		*(.eh_frame)
241		*(.interp)
242	}
243}
244