xref: /linux/arch/arm/boot/compressed/vmlinux.lds.S (revision c532de5a67a70f8533d495f8f2aaa9a0491c3ad0) 
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 *  Copyright (C) 2000 Russell King
4 */
5#include <asm/vmlinux.lds.h>
6
7#ifdef CONFIG_CPU_ENDIAN_BE8
8#define ZIMAGE_MAGIC(x) ( (((x) >> 24) & 0x000000ff) | \
9			  (((x) >>  8) & 0x0000ff00) | \
10			  (((x) <<  8) & 0x00ff0000) | \
11			  (((x) << 24) & 0xff000000) )
12#else
13#define ZIMAGE_MAGIC(x) (x)
14#endif
15
16OUTPUT_ARCH(arm)
17ENTRY(_start)
18SECTIONS
19{
20  /DISCARD/ : {
21    COMMON_DISCARDS
22    *(.ARM.exidx*)
23    *(.ARM.extab*)
24    *(.note.*)
25    *(.rel.*)
26    *(.printk_index)
27    /*
28     * Discard any r/w data - this produces a link error if we have any,
29     * which is required for PIC decompression.  Local data generates
30     * GOTOFF relocations, which prevents it being relocated independently
31     * of the text/got segments.
32     */
33    *(.data)
34  }
35
36  . = TEXT_START;
37  _text = .;
38
39  .text : {
40    _start = .;
41    *(.start)
42    *(.text)
43    *(.text.*)
44    ARM_STUBS_TEXT
45  }
46  .table : ALIGN(4) {
47    _table_start = .;
48    LONG(ZIMAGE_MAGIC(6))
49    LONG(ZIMAGE_MAGIC(0x5a534c4b))
50    LONG(ZIMAGE_MAGIC(__piggy_size_addr - _start))
51    LONG(ZIMAGE_MAGIC(_kernel_bss_size))
52    LONG(ZIMAGE_MAGIC(TEXT_OFFSET))
53    LONG(ZIMAGE_MAGIC(MALLOC_SIZE))
54    LONG(0)
55    _table_end = .;
56  }
57  .rodata : {
58    *(.rodata)
59    *(.rodata.*)
60    *(.data.rel.ro)
61    *(.data.rel.ro.*)
62  }
63  .piggydata : {
64    *(.piggydata)
65    __piggy_size_addr = . - 4;
66  }
67
68  . = ALIGN(4);
69  _etext = .;
70
71  .got.plt		: { *(.got.plt) }
72#ifndef CONFIG_EFI_STUB
73  _got_start = .;
74  .got			: { *(.got) }
75  _got_end = .;
76#endif
77
78  /* ensure the zImage file size is always a multiple of 64 bits */
79  /* (without a dummy byte, ld just ignores the empty section) */
80  .pad			: { BYTE(0); . = ALIGN(8); }
81
82#ifdef CONFIG_EFI_STUB
83  .data : ALIGN(4096) {
84    __pecoff_data_start = .;
85    _got_start = .;
86    *(.got)
87    _got_end = .;
88    /*
89     * The EFI stub always executes from RAM, and runs strictly before the
90     * decompressor, so we can make an exception for its r/w data, and keep it
91     */
92    *(.data.efistub .bss.efistub)
93    __pecoff_data_end = .;
94
95    /*
96     * PE/COFF mandates a file size which is a multiple of 512 bytes if the
97     * section size equals or exceeds 4 KB
98     */
99    . = ALIGN(512);
100  }
101  __pecoff_data_rawsize = . - ADDR(.data);
102#endif
103
104  _edata = .;
105
106  /*
107   * The image_end section appears after any additional loadable sections
108   * that the linker may decide to insert in the binary image.  Having
109   * this symbol allows further debug in the near future.
110   */
111  .image_end (NOLOAD) : {
112    /*
113     * EFI requires that the image is aligned to 512 bytes, and appended
114     * DTB requires that we know where the end of the image is.  Ensure
115     * that both are satisfied by ensuring that there are no additional
116     * sections emitted into the decompressor image.
117     */
118    _edata_real = .;
119  }
120
121  _magic_sig = ZIMAGE_MAGIC(0x016f2818);
122  _magic_start = ZIMAGE_MAGIC(_start);
123  _magic_end = ZIMAGE_MAGIC(_edata);
124  _magic_table = ZIMAGE_MAGIC(_table_start - _start);
125
126  . = BSS_START;
127  __bss_start = .;
128  .bss			: { *(.bss .bss.*) }
129  _end = .;
130
131  . = ALIGN(8);		/* the stack must be 64-bit aligned */
132  .stack		: { *(.stack) }
133
134  PROVIDE(__pecoff_data_size = ALIGN(512) - ADDR(.data));
135  PROVIDE(__pecoff_end = ALIGN(512));
136
137  STABS_DEBUG
138  DWARF_DEBUG
139  ARM_DETAILS
140
141  ARM_ASSERTS
142}
143ASSERT(_edata_real == _edata, "error: zImage file size is incorrect");
144