xref: /linux/arch/s390/boot/vmlinux.lds.S (revision 1e3e4dc332f3ee3f3ec9da5c7eaf147460841843) 
1/* SPDX-License-Identifier: GPL-2.0 */
2#include <asm-generic/vmlinux.lds.h>
3#include <asm/vmlinux.lds.h>
4#include <asm/thread_info.h>
5#include <asm/page.h>
6#include <asm/sclp.h>
7#include "boot.h"
8
9OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
10OUTPUT_ARCH(s390:64-bit)
11
12ENTRY(startup)
13
14SECTIONS
15{
16	. = 0;
17	.ipldata : {
18		*(.ipldata)
19	}
20	. = IPL_START;
21	.head.text : {
22		_head = . ;
23		HEAD_TEXT
24		_ehead = . ;
25	}
26	. = PARMAREA;
27	.parmarea : {
28		*(.parmarea)
29	}
30	.text :	{
31		_text = .;	/* Text */
32		*(.text)
33		*(.text.*)
34		*(.noinstr.text)
35		INIT_TEXT
36		_etext = . ;
37	}
38	.rodata : {
39		_rodata = . ;
40		*(.rodata)	 /* read-only data */
41		*(.rodata.*)
42		_erodata = . ;
43	}
44	EXCEPTION_TABLE(16)
45	.got : {
46		*(.got)
47	}
48	NOTES
49	.data :	{
50		_data = . ;
51		*(.data)
52		*(.data.*)
53		_edata = . ;
54	}
55
56	BOOT_DATA
57	BOOT_DATA_PRESERVED
58
59	/*
60	 * This is the BSS section of the decompressor and not of the decompressed Linux kernel.
61	 * It will consume place in the decompressor's image.
62	 */
63	. = ALIGN(8);
64	.bss : {
65		_bss = . ;
66		*(.bss)
67		*(.bss.*)
68		*(COMMON)
69		/*
70		 * Stacks for the decompressor
71		 */
72		. = ALIGN(PAGE_SIZE);
73		_dump_info_stack_start = .;
74		. += PAGE_SIZE;
75		_dump_info_stack_end = .;
76		. = ALIGN(PAGE_SIZE);
77		_stack_start = .;
78		. += BOOT_STACK_SIZE;
79		_stack_end = .;
80		_ebss = .;
81	}
82
83	/*
84	 * uncompressed image info used by the decompressor it should match
85	 * struct vmlinux_info. It comes from .vmlinux.info section of
86	 * uncompressed vmlinux in a form of info.o
87	 */
88	. = ALIGN(8);
89	.vmlinux.info : {
90		_vmlinux_info = .;
91		*(.vmlinux.info)
92	}
93
94	.decompressor.syms : {
95		. += 1; /* make sure we have \0 before the first entry */
96		. = ALIGN(2);
97		_decompressor_syms_start = .;
98		*(.decompressor.syms)
99		_decompressor_syms_end = .;
100	}
101
102	_decompressor_end = .;
103
104	. = ALIGN(4);
105	.vmlinux.relocs : {
106		__vmlinux_relocs_64_start = .;
107		*(.vmlinux.relocs_64)
108		__vmlinux_relocs_64_end = .;
109	}
110
111#ifdef CONFIG_KERNEL_UNCOMPRESSED
112	. = ALIGN(PAGE_SIZE);
113	. += AMODE31_SIZE;		/* .amode31 section */
114
115	/*
116	 * Make sure the location counter is not less than TEXT_OFFSET.
117	 * _SEGMENT_SIZE is not available, use ALIGN(1 << 20) instead.
118	 */
119	. = MAX(TEXT_OFFSET, ALIGN(1 << 20));
120#else
121	. = ALIGN(8);
122#endif
123	.rodata.compressed : {
124		_compressed_start = .;
125		*(.vmlinux.bin.compressed)
126		_compressed_end = .;
127	}
128
129#define SB_TRAILER_SIZE 32
130	/* Trailer needed for Secure Boot */
131	. += SB_TRAILER_SIZE; /* make sure .sb.trailer does not overwrite the previous section */
132	. = ALIGN(4096) - SB_TRAILER_SIZE;
133	.sb.trailer : {
134		QUAD(0)
135		QUAD(0)
136		QUAD(0)
137		QUAD(0x000000207a49504c)
138	}
139	_end = .;
140
141	/* Sections to be discarded */
142	/DISCARD/ : {
143		COMMON_DISCARDS
144		*(.eh_frame)
145		*(*__ksymtab*)
146		*(___kcrctab*)
147		*(.modinfo)
148	}
149
150	DWARF_DEBUG
151	ELF_DETAILS
152
153	/*
154	 * Make sure that the .got.plt is either completely empty or it
155	 * contains only the three reserved double words.
156	 */
157	.got.plt : {
158		*(.got.plt)
159	}
160	ASSERT(SIZEOF(.got.plt) == 0 || SIZEOF(.got.plt) == 0x18, "Unexpected GOT/PLT entries detected!")
161
162	/*
163	 * Sections that should stay zero sized, which is safer to
164	 * explicitly check instead of blindly discarding.
165	 */
166	.plt : {
167		*(.plt) *(.plt.*) *(.iplt) *(.igot .igot.plt)
168	}
169	ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!")
170	.rela.dyn : {
171		*(.rela.*) *(.rela_*)
172	}
173	ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!")
174}
175