1/* SPDX-License-Identifier: GPL-2.0 */
2#include <asm-generic/vmlinux.lds.h>
3
4#ifdef CONFIG_HOTPLUG_CPU
5#define ARM_CPU_DISCARD(x)
6#define ARM_CPU_KEEP(x)		x
7#else
8#define ARM_CPU_DISCARD(x)	x
9#define ARM_CPU_KEEP(x)
10#endif
11
12#if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \
13	defined(CONFIG_GENERIC_BUG) || defined(CONFIG_JUMP_LABEL)
14#define ARM_EXIT_KEEP(x)	x
15#define ARM_EXIT_DISCARD(x)
16#else
17#define ARM_EXIT_KEEP(x)
18#define ARM_EXIT_DISCARD(x)	x
19#endif
20
21#ifdef CONFIG_MMU
22#define ARM_MMU_KEEP(x)		x
23#define ARM_MMU_DISCARD(x)
24#else
25#define ARM_MMU_KEEP(x)
26#define ARM_MMU_DISCARD(x)	x
27#endif
28
29/*
30 * ld.lld does not support NOCROSSREFS:
31 * https://github.com/ClangBuiltLinux/linux/issues/1609
32 */
33#ifdef CONFIG_LD_IS_LLD
34#define NOCROSSREFS
35#endif
36
37/* Set start/end symbol names to the LMA for the section */
38#define ARM_LMA(sym, section)						\
39	sym##_start = LOADADDR(section);				\
40	sym##_end = LOADADDR(section) + SIZEOF(section)
41
42#define PROC_INFO							\
43		. = ALIGN(4);						\
44		__proc_info_begin = .;					\
45		*(.proc.info.init)					\
46		__proc_info_end = .;
47
48#define IDMAP_TEXT							\
49		ALIGN_FUNCTION();					\
50		__idmap_text_start = .;					\
51		*(.idmap.text)						\
52		__idmap_text_end = .;					\
53
54#define ARM_DISCARD							\
55		*(.ARM.exidx.exit.text)					\
56		*(.ARM.extab.exit.text)					\
57		*(.ARM.exidx.text.exit)					\
58		*(.ARM.extab.text.exit)					\
59		ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text))		\
60		ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text))		\
61		ARM_EXIT_DISCARD(EXIT_TEXT)				\
62		ARM_EXIT_DISCARD(EXIT_DATA)				\
63		EXIT_CALL						\
64		ARM_MMU_DISCARD(*(.text.fixup))				\
65		ARM_MMU_DISCARD(*(__ex_table))				\
66		COMMON_DISCARDS
67
68/*
69 * Sections that should stay zero sized, which is safer to explicitly
70 * check instead of blindly discarding.
71 */
72#define ARM_ASSERTS							\
73	.plt : {							\
74		*(.iplt) *(.rel.iplt) *(.iplt) *(.igot.plt)		\
75	}								\
76	ASSERT(SIZEOF(.plt) == 0,					\
77	       "Unexpected run-time procedure linkages detected!")
78
79#define ARM_DETAILS							\
80		ELF_DETAILS						\
81		.ARM.attributes 0 : { *(.ARM.attributes) }
82
83#define ARM_STUBS_TEXT							\
84		*(.gnu.warning)						\
85		*(.glue_7)						\
86		*(.glue_7t)						\
87		*(.vfp11_veneer)                                        \
88		*(.v4_bx)
89
90#define ARM_TEXT							\
91		IDMAP_TEXT						\
92		__entry_text_start = .;					\
93		*(.entry.text)						\
94		__entry_text_end = .;					\
95		IRQENTRY_TEXT						\
96		SOFTIRQENTRY_TEXT					\
97		TEXT_TEXT						\
98		SCHED_TEXT						\
99		LOCK_TEXT						\
100		KPROBES_TEXT						\
101		ARM_STUBS_TEXT						\
102		. = ALIGN(4);						\
103		*(.got)			/* Global offset table */	\
104		ARM_CPU_KEEP(PROC_INFO)
105
106/* Stack unwinding tables */
107#define ARM_UNWIND_SECTIONS						\
108	. = ALIGN(8);							\
109	.ARM.unwind_idx : {						\
110		__start_unwind_idx = .;					\
111		*(.ARM.exidx*)						\
112		__stop_unwind_idx = .;					\
113	}								\
114	.ARM.unwind_tab : {						\
115		__start_unwind_tab = .;					\
116		*(.ARM.extab*)						\
117		__stop_unwind_tab = .;					\
118	}
119
120/*
121 * The vectors and stubs are relocatable code, and the
122 * only thing that matters is their relative offsets
123 */
124#define ARM_VECTORS							\
125	__vectors_lma = .;						\
126	OVERLAY 0xffff0000 : NOCROSSREFS AT(__vectors_lma) {		\
127		.vectors {						\
128			*(.vectors)					\
129		}							\
130		.vectors.bhb.loop8 {					\
131			*(.vectors.bhb.loop8)				\
132		}							\
133		.vectors.bhb.bpiall {					\
134			*(.vectors.bhb.bpiall)				\
135		}							\
136	}								\
137	ARM_LMA(__vectors, .vectors);					\
138	ARM_LMA(__vectors_bhb_loop8, .vectors.bhb.loop8);		\
139	ARM_LMA(__vectors_bhb_bpiall, .vectors.bhb.bpiall);		\
140	. = __vectors_lma + SIZEOF(.vectors) +				\
141		SIZEOF(.vectors.bhb.loop8) +				\
142		SIZEOF(.vectors.bhb.bpiall);				\
143									\
144	__stubs_lma = .;						\
145	.stubs ADDR(.vectors) + 0x1000 : AT(__stubs_lma) {		\
146		*(.stubs)						\
147	}								\
148	ARM_LMA(__stubs, .stubs);					\
149	. = __stubs_lma + SIZEOF(.stubs);				\
150									\
151	PROVIDE(vector_fiq_offset = vector_fiq - ADDR(.vectors));
152
153#define ARM_TCM								\
154	__itcm_start = ALIGN(4);					\
155	.text_itcm ITCM_OFFSET : AT(__itcm_start - LOAD_OFFSET) {	\
156		__sitcm_text = .;					\
157		*(.tcm.text)						\
158		*(.tcm.rodata)						\
159		. = ALIGN(4);						\
160		__eitcm_text = .;					\
161	}								\
162	. = __itcm_start + SIZEOF(.text_itcm);				\
163									\
164	__dtcm_start = .;						\
165	.data_dtcm DTCM_OFFSET : AT(__dtcm_start - LOAD_OFFSET) {	\
166		__sdtcm_data = .;					\
167		*(.tcm.data)						\
168		. = ALIGN(4);						\
169		__edtcm_data = .;					\
170	}								\
171	. = __dtcm_start + SIZEOF(.data_dtcm);
172