vmlinux.lds.S

  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	EXCEPTION_TABLE(16)
 44	.got : {
 45		*(.got)
 46	}
 47	NOTES
 48	.data :	{
 49		_data = . ;
 50		*(.data)
 51		*(.data.*)
 52		_edata = . ;
 53	}
 54
 55	BOOT_DATA
 56	BOOT_DATA_PRESERVED
 57
 58	/*
 59	 * This is the BSS section of the decompressor and not of the decompressed Linux kernel.
 60	 * It will consume place in the decompressor's image.
 61	 */
 62	. = ALIGN(8);
 63	.bss : {
 64		_bss = . ;
 65		*(.bss)
 66		*(.bss.*)
 67		*(COMMON)
 68		/*
 69		 * Stacks for the decompressor
 70		 */
 71		. = ALIGN(PAGE_SIZE);
 72		_dump_info_stack_start = .;
 73		. += PAGE_SIZE;
 74		_dump_info_stack_end = .;
 75		. = ALIGN(PAGE_SIZE);
 76		_stack_start = .;
 77		. += BOOT_STACK_SIZE;
 78		_stack_end = .;
 79		_ebss = .;
 80	}
 81
 82	/*
 83	 * uncompressed image info used by the decompressor it should match
 84	 * struct vmlinux_info. It comes from .vmlinux.info section of
 85	 * uncompressed vmlinux in a form of info.o
 86	 */
 87	. = ALIGN(8);
 88	.vmlinux.info : {
 89		_vmlinux_info = .;
 90		*(.vmlinux.info)
 91	}
 92
 93	.decompressor.syms : {
 94		. += 1; /* make sure we have \0 before the first entry */
 95		. = ALIGN(2);
 96		_decompressor_syms_start = .;
 97		*(.decompressor.syms)
 98		_decompressor_syms_end = .;
 99	}
100
101	_decompressor_end = .;
102
103	. = ALIGN(4);
104	.vmlinux.relocs : {
105		__vmlinux_relocs_64_start = .;
106		*(.vmlinux.relocs_64)
107		__vmlinux_relocs_64_end = .;
108	}
109
110#ifdef CONFIG_KERNEL_UNCOMPRESSED
111	. = ALIGN(PAGE_SIZE);
112	. += AMODE31_SIZE;		/* .amode31 section */
113
114	/*
115	 * Make sure the location counter is not less than TEXT_OFFSET.
116	 * _SEGMENT_SIZE is not available, use ALIGN(1 << 20) instead.
117	 */
118	. = MAX(TEXT_OFFSET, ALIGN(1 << 20));
119#else
120	. = ALIGN(8);
121#endif
122	.rodata.compressed : {
123		_compressed_start = .;
124		*(.vmlinux.bin.compressed)
125		_compressed_end = .;
126	}
127
128#define SB_TRAILER_SIZE 32
129	/* Trailer needed for Secure Boot */
130	. += SB_TRAILER_SIZE; /* make sure .sb.trailer does not overwrite the previous section */
131	. = ALIGN(4096) - SB_TRAILER_SIZE;
132	.sb.trailer : {
133		QUAD(0)
134		QUAD(0)
135		QUAD(0)
136		QUAD(0x000000207a49504c)
137	}
138	_end = .;
139
140	/* Sections to be discarded */
141	/DISCARD/ : {
142		COMMON_DISCARDS
143		*(.eh_frame)
144		*(*__ksymtab*)
145		*(___kcrctab*)
146		*(.modinfo)
147	}
148
149	DWARF_DEBUG
150	ELF_DETAILS
151
152	/*
153	 * Make sure that the .got.plt is either completely empty or it
154	 * contains only the three reserved double words.
155	 */
156	.got.plt : {
157		*(.got.plt)
158	}
159	ASSERT(SIZEOF(.got.plt) == 0 || SIZEOF(.got.plt) == 0x18, "Unexpected GOT/PLT entries detected!")
160
161	/*
162	 * Sections that should stay zero sized, which is safer to
163	 * explicitly check instead of blindly discarding.
164	 */
165	.plt : {
166		*(.plt) *(.plt.*) *(.iplt) *(.igot .igot.plt)
167	}
168	ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!")
169	.rela.dyn : {
170		*(.rela.*) *(.rela_*)
171	}
172	ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!")
173}