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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
20OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
21OUTPUT_ARCH(s390:64-bit)
22ENTRY(startup)
23jiffies = jiffies_64;
24
25PHDRS {
26	text PT_LOAD FLAGS(5);	/* R_E */
27	data PT_LOAD FLAGS(7);	/* RWE */
28	note PT_NOTE FLAGS(0);	/* ___ */
29}
30
31SECTIONS
32{
33	. = 0x00000000;
34	.text : {
35		/* Text and read-only data */
36		HEAD_TEXT
37		/*
38		 * E.g. perf doesn't like symbols starting at address zero,
39		 * therefore skip the initial PSW and channel program located
40		 * at address zero and let _text start at 0x200.
41		 */
42	_text = 0x200;
43		TEXT_TEXT
44		SCHED_TEXT
45		CPUIDLE_TEXT
46		LOCK_TEXT
47		KPROBES_TEXT
48		IRQENTRY_TEXT
49		SOFTIRQENTRY_TEXT
50		*(.fixup)
51		*(.gnu.warning)
52	} :text = 0x0700
53
54	. = ALIGN(PAGE_SIZE);
55	_etext = .;		/* End of text section */
56
57	NOTES :text :note
58
59	.dummy : { *(.dummy) } :data
60
61	RO_DATA_SECTION(PAGE_SIZE)
62
63#ifdef CONFIG_SHARED_KERNEL
64	. = ALIGN(0x100000);	/* VM shared segments are 1MB aligned */
65#endif
66
67	. = ALIGN(PAGE_SIZE);
68	_eshared = .;		/* End of shareable data */
69	_sdata = .;		/* Start of data section */
70
71	. = ALIGN(PAGE_SIZE);
72	__start_ro_after_init = .;
73	.data..ro_after_init : {
74		 *(.data..ro_after_init)
75	}
76	EXCEPTION_TABLE(16)
77	. = ALIGN(PAGE_SIZE);
78	__end_ro_after_init = .;
79
80	RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE)
81
82	_edata = .;		/* End of data section */
83
84	/* will be freed after init */
85	. = ALIGN(PAGE_SIZE);	/* Init code and data */
86	__init_begin = .;
87
88	. = ALIGN(PAGE_SIZE);
89	.init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
90		VMLINUX_SYMBOL(_sinittext) = . ;
91		INIT_TEXT
92		. = ALIGN(PAGE_SIZE);
93		VMLINUX_SYMBOL(_einittext) = . ;
94	}
95
96	/*
97	 * .exit.text is discarded at runtime, not link time,
98	 * to deal with references from __bug_table
99	*/
100	.exit.text : {
101		EXIT_TEXT
102	}
103
104	.exit.data : {
105		EXIT_DATA
106	}
107
108	/*
109	 * struct alt_inst entries. From the header (alternative.h):
110	 * "Alternative instructions for different CPU types or capabilities"
111	 * Think locking instructions on spinlocks.
112	 * Note, that it is a part of __init region.
113	 */
114	. = ALIGN(8);
115	.altinstructions : {
116		__alt_instructions = .;
117		*(.altinstructions)
118		__alt_instructions_end = .;
119	}
120
121	/*
122	 * And here are the replacement instructions. The linker sticks
123	 * them as binary blobs. The .altinstructions has enough data to
124	 * get the address and the length of them to patch the kernel safely.
125	 * Note, that it is a part of __init region.
126	 */
127	.altinstr_replacement : {
128		*(.altinstr_replacement)
129	}
130
131	/*
132	 * Table with the patch locations to undo expolines
133	*/
134	.nospec_call_table : {
135		__nospec_call_start = . ;
136		*(.s390_indirect*)
137		__nospec_call_end = . ;
138	}
139	.nospec_return_table : {
140		__nospec_return_start = . ;
141		*(.s390_return*)
142		__nospec_return_end = . ;
143	}
144
145	/* early.c uses stsi, which requires page aligned data. */
146	. = ALIGN(PAGE_SIZE);
147	INIT_DATA_SECTION(0x100)
148
149	PERCPU_SECTION(0x100)
150	. = ALIGN(PAGE_SIZE);
151	__init_end = .;		/* freed after init ends here */
152
153	BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE)
154
155	_end = . ;
156
157	/* Debugging sections.	*/
158	STABS_DEBUG
159	DWARF_DEBUG
160
161	/* Sections to be discarded */
162	DISCARDS
163}
164