xref: /linux/arch/s390/boot/vmlinux.lds.S (revision 48fb4b3d9b43ea8f81de06f12f83912f8c1d5a15) 
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		INIT_TEXT
35		_etext = . ;
36	}
37	.rodata : {
38		_rodata = . ;
39		*(.rodata)	 /* read-only data */
40		*(.rodata.*)
41		_erodata = . ;
42	}
43	.got : {
44		*(.got)
45	}
46	NOTES
47	.data :	{
48		_data = . ;
49		*(.data)
50		*(.data.*)
51		_edata = . ;
52	}
53
54	BOOT_DATA
55	BOOT_DATA_PRESERVED
56
57	/*
58	 * This is the BSS section of the decompressor and not of the decompressed Linux kernel.
59	 * It will consume place in the decompressor's image.
60	 */
61	. = ALIGN(8);
62	.bss : {
63		_bss = . ;
64		*(.bss)
65		*(.bss.*)
66		*(COMMON)
67		/*
68		 * Stacks for the decompressor
69		 */
70		. = ALIGN(PAGE_SIZE);
71		_dump_info_stack_start = .;
72		. += PAGE_SIZE;
73		_dump_info_stack_end = .;
74		. = ALIGN(PAGE_SIZE);
75		_stack_start = .;
76		. += BOOT_STACK_SIZE;
77		_stack_end = .;
78		_ebss = .;
79	}
80
81	/*
82	 * uncompressed image info used by the decompressor it should match
83	 * struct vmlinux_info. It comes from .vmlinux.info section of
84	 * uncompressed vmlinux in a form of info.o
85	 */
86	. = ALIGN(8);
87	.vmlinux.info : {
88		_vmlinux_info = .;
89		*(.vmlinux.info)
90	}
91
92	.decompressor.syms : {
93		. += 1; /* make sure we have \0 before the first entry */
94		. = ALIGN(2);
95		_decompressor_syms_start = .;
96		*(.decompressor.syms)
97		_decompressor_syms_end = .;
98	}
99
100	_decompressor_end = .;
101
102	. = ALIGN(4);
103	.vmlinux.relocs : {
104		__vmlinux_relocs_64_start = .;
105		*(.vmlinux.relocs_64)
106		__vmlinux_relocs_64_end = .;
107	}
108
109#ifdef CONFIG_KERNEL_UNCOMPRESSED
110	. = ALIGN(PAGE_SIZE);
111	. += AMODE31_SIZE;		/* .amode31 section */
112
113	/*
114	 * Make sure the location counter is not less than TEXT_OFFSET.
115	 * _SEGMENT_SIZE is not available, use ALIGN(1 << 20) instead.
116	 */
117	. = MAX(TEXT_OFFSET, ALIGN(1 << 20));
118#else
119	. = ALIGN(8);
120#endif
121	.rodata.compressed : {
122		_compressed_start = .;
123		*(.vmlinux.bin.compressed)
124		_compressed_end = .;
125	}
126
127#define SB_TRAILER_SIZE 32
128	/* Trailer needed for Secure Boot */
129	. += SB_TRAILER_SIZE; /* make sure .sb.trailer does not overwrite the previous section */
130	. = ALIGN(4096) - SB_TRAILER_SIZE;
131	.sb.trailer : {
132		QUAD(0)
133		QUAD(0)
134		QUAD(0)
135		QUAD(0x000000207a49504c)
136	}
137	_end = .;
138
139	DWARF_DEBUG
140	ELF_DETAILS
141
142	/*
143	 * Make sure that the .got.plt is either completely empty or it
144	 * contains only the three reserved double words.
145	 */
146	.got.plt : {
147		*(.got.plt)
148	}
149	ASSERT(SIZEOF(.got.plt) == 0 || SIZEOF(.got.plt) == 0x18, "Unexpected GOT/PLT entries detected!")
150
151	/*
152	 * Sections that should stay zero sized, which is safer to
153	 * explicitly check instead of blindly discarding.
154	 */
155	.plt : {
156		*(.plt) *(.plt.*) *(.iplt) *(.igot .igot.plt)
157	}
158	ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!")
159	.rela.dyn : {
160		*(.rela.*) *(.rela_*)
161	}
162	ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!")
163
164	/* Sections to be discarded */
165	/DISCARD/ : {
166		COMMON_DISCARDS
167		*(.eh_frame)
168		*(__ex_table)
169		*(*__ksymtab*)
170		*(___kcrctab*)
171	}
172}
173