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
9/*
10 * Put .bss..swapper_pg_dir as the first thing in .bss. This will
11 * make sure it has 16k alignment.
12 */
13#define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir)
14
15/* Handle ro_after_init data on our own. */
16#define RO_AFTER_INIT_DATA
17
18#include <asm-generic/vmlinux.lds.h>
19#include <asm/vmlinux.lds.h>
20
21OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
22OUTPUT_ARCH(s390:64-bit)
23ENTRY(startup_continue)
24jiffies = jiffies_64;
25
26PHDRS {
27	text PT_LOAD FLAGS(5);	/* R_E */
28	data PT_LOAD FLAGS(7);	/* RWE */
29	note PT_NOTE FLAGS(0);	/* ___ */
30}
31
32SECTIONS
33{
34	. = 0x100000;
35	.text : {
36		_stext = .;		/* Start of text section */
37		_text = .;		/* Text and read-only data */
38		HEAD_TEXT
39		TEXT_TEXT
40		SCHED_TEXT
41		CPUIDLE_TEXT
42		LOCK_TEXT
43		KPROBES_TEXT
44		IRQENTRY_TEXT
45		SOFTIRQENTRY_TEXT
46		*(.text.*_indirect_*)
47		*(.fixup)
48		*(.gnu.warning)
49		. = ALIGN(PAGE_SIZE);
50		_etext = .;		/* End of text section */
51	} :text = 0x0700
52
53	NOTES :text :note
54
55	.dummy : { *(.dummy) } :data
56
57	RO_DATA_SECTION(PAGE_SIZE)
58
59	. = ALIGN(PAGE_SIZE);
60	_sdata = .;		/* Start of data section */
61
62	. = ALIGN(PAGE_SIZE);
63	__start_ro_after_init = .;
64	.data..ro_after_init : {
65		 *(.data..ro_after_init)
66		JUMP_TABLE_DATA
67	}
68	EXCEPTION_TABLE(16)
69	. = ALIGN(PAGE_SIZE);
70	__end_ro_after_init = .;
71
72	RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE)
73	BOOT_DATA_PRESERVED
74
75	_edata = .;		/* End of data section */
76
77	/* will be freed after init */
78	. = ALIGN(PAGE_SIZE);	/* Init code and data */
79	__init_begin = .;
80
81	. = ALIGN(PAGE_SIZE);
82	.init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
83		_sinittext = .;
84		INIT_TEXT
85		. = ALIGN(PAGE_SIZE);
86		_einittext = .;
87	}
88
89	/*
90	 * .exit.text is discarded at runtime, not link time,
91	 * to deal with references from __bug_table
92	*/
93	.exit.text : {
94		EXIT_TEXT
95	}
96
97	.exit.data : {
98		EXIT_DATA
99	}
100
101	/*
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.
106	 */
107	. = ALIGN(8);
108	.altinstructions : {
109		__alt_instructions = .;
110		*(.altinstructions)
111		__alt_instructions_end = .;
112	}
113
114	/*
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.
119	 */
120	.altinstr_replacement : {
121		*(.altinstr_replacement)
122	}
123
124	/*
125	 * Table with the patch locations to undo expolines
126	*/
127	.nospec_call_table : {
128		__nospec_call_start = . ;
129		*(.s390_indirect*)
130		__nospec_call_end = . ;
131	}
132	.nospec_return_table : {
133		__nospec_return_start = . ;
134		*(.s390_return*)
135		__nospec_return_end = . ;
136	}
137
138	BOOT_DATA
139
140	/* early.c uses stsi, which requires page aligned data. */
141	. = ALIGN(PAGE_SIZE);
142	INIT_DATA_SECTION(0x100)
143
144	PERCPU_SECTION(0x100)
145
146	.dynsym ALIGN(8) : {
147		__dynsym_start = .;
148		*(.dynsym)
149		__dynsym_end = .;
150	}
151	.rela.dyn ALIGN(8) : {
152		__rela_dyn_start = .;
153		*(.rela*)
154		__rela_dyn_end = .;
155	}
156
157	. = ALIGN(PAGE_SIZE);
158	__init_end = .;		/* freed after init ends here */
159
160	BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE)
161
162	_end = . ;
163
164	/*
165	 * uncompressed image info used by the decompressor
166	 * it should match struct vmlinux_info
167	 */
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 */
181	} :NONE
182
183	/* Debugging sections.	*/
184	STABS_DEBUG
185	DWARF_DEBUG
186
187	/* Sections to be discarded */
188	DISCARDS
189	/DISCARD/ : {
190		*(.eh_frame)
191	}
192}
193