vmlinux.lds.h

  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)		KEEP(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#ifdef CONFIG_LD_CAN_USE_KEEP_IN_OVERLAY
 38#define OVERLAY_KEEP(x)		KEEP(x)
 39#else
 40#define OVERLAY_KEEP(x)		x
 41#endif
 42
 43/* Set start/end symbol names to the LMA for the section */
 44#define ARM_LMA(sym, section)						\
 45	sym##_start = LOADADDR(section);				\
 46	sym##_end = LOADADDR(section) + SIZEOF(section)
 47
 48#define PROC_INFO							\
 49		. = ALIGN(4);						\
 50		__proc_info_begin = .;					\
 51		KEEP(*(.proc.info.init))				\
 52		__proc_info_end = .;
 53
 54#define IDMAP_TEXT							\
 55		ALIGN_FUNCTION();					\
 56		__idmap_text_start = .;					\
 57		*(.idmap.text)						\
 58		__idmap_text_end = .;					\
 59
 60#define ARM_DISCARD							\
 61		*(.ARM.exidx.exit.text)					\
 62		*(.ARM.extab.exit.text)					\
 63		*(.ARM.exidx.text.exit)					\
 64		*(.ARM.extab.text.exit)					\
 65		ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text))		\
 66		ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text))		\
 67		ARM_EXIT_DISCARD(EXIT_TEXT)				\
 68		ARM_EXIT_DISCARD(EXIT_DATA)				\
 69		EXIT_CALL						\
 70		ARM_MMU_DISCARD(*(.text.fixup))				\
 71		ARM_MMU_DISCARD(*(__ex_table))				\
 72		COMMON_DISCARDS
 73
 74/*
 75 * Sections that should stay zero sized, which is safer to explicitly
 76 * check instead of blindly discarding.
 77 */
 78#define ARM_ASSERTS							\
 79	.plt : {							\
 80		*(.iplt) *(.rel.iplt) *(.iplt) *(.igot.plt)		\
 81	}								\
 82	ASSERT(SIZEOF(.plt) == 0,					\
 83	       "Unexpected run-time procedure linkages detected!")
 84
 85#define ARM_DETAILS							\
 86		ELF_DETAILS						\
 87		.ARM.attributes 0 : { *(.ARM.attributes) }
 88
 89#define ARM_STUBS_TEXT							\
 90		*(.gnu.warning)						\
 91		*(.glue_7)						\
 92		*(.glue_7t)						\
 93		*(.vfp11_veneer)                                        \
 94		*(.v4_bx)
 95
 96#define ARM_TEXT							\
 97		IDMAP_TEXT						\
 98		__entry_text_start = .;					\
 99		*(.entry.text)						\
100		__entry_text_end = .;					\
101		IRQENTRY_TEXT						\
102		SOFTIRQENTRY_TEXT					\
103		TEXT_TEXT						\
104		SCHED_TEXT						\
105		LOCK_TEXT						\
106		KPROBES_TEXT						\
107		ARM_STUBS_TEXT						\
108		. = ALIGN(4);						\
109		*(.got)			/* Global offset table */	\
110		ARM_CPU_KEEP(PROC_INFO)
111
112/* Stack unwinding tables */
113#define ARM_UNWIND_SECTIONS						\
114	. = ALIGN(8);							\
115	.ARM.unwind_idx : {						\
116		__start_unwind_idx = .;					\
117		*(.ARM.exidx*)						\
118		__stop_unwind_idx = .;					\
119	}								\
120	.ARM.unwind_tab : {						\
121		__start_unwind_tab = .;					\
122		*(.ARM.extab*)						\
123		__stop_unwind_tab = .;					\
124	}
125
126/*
127 * The vectors and stubs are relocatable code, and the
128 * only thing that matters is their relative offsets
129 */
130#define ARM_VECTORS							\
131	__vectors_lma = .;						\
132	OVERLAY 0xffff0000 : NOCROSSREFS AT(__vectors_lma) {		\
133		.vectors {						\
134			OVERLAY_KEEP(*(.vectors))			\
135		}							\
136		.vectors.bhb.loop8 {					\
137			OVERLAY_KEEP(*(.vectors.bhb.loop8))		\
138		}							\
139		.vectors.bhb.bpiall {					\
140			OVERLAY_KEEP(*(.vectors.bhb.bpiall))		\
141		}							\
142	}								\
143	ARM_LMA(__vectors, .vectors);					\
144	ARM_LMA(__vectors_bhb_loop8, .vectors.bhb.loop8);		\
145	ARM_LMA(__vectors_bhb_bpiall, .vectors.bhb.bpiall);		\
146	. = __vectors_lma + SIZEOF(.vectors) +				\
147		SIZEOF(.vectors.bhb.loop8) +				\
148		SIZEOF(.vectors.bhb.bpiall);				\
149									\
150	__stubs_lma = .;						\
151	.stubs ADDR(.vectors) + 0x1000 : AT(__stubs_lma) {		\
152		*(.stubs)						\
153	}								\
154	ARM_LMA(__stubs, .stubs);					\
155	. = __stubs_lma + SIZEOF(.stubs);				\
156									\
157	PROVIDE(vector_fiq_offset = vector_fiq - ADDR(.vectors));
158
159#define ARM_TCM								\
160	__itcm_start = ALIGN(4);					\
161	.text_itcm ITCM_OFFSET : AT(__itcm_start - LOAD_OFFSET) {	\
162		__sitcm_text = .;					\
163		*(.tcm.text)						\
164		*(.tcm.rodata)						\
165		. = ALIGN(4);						\
166		__eitcm_text = .;					\
167	}								\
168	. = __itcm_start + SIZEOF(.text_itcm);				\
169									\
170	__dtcm_start = .;						\
171	.data_dtcm DTCM_OFFSET : AT(__dtcm_start - LOAD_OFFSET) {	\
172		__sdtcm_data = .;					\
173		*(.tcm.data)						\
174		. = ALIGN(4);						\
175		__edtcm_data = .;					\
176	}								\
177	. = __dtcm_start + SIZEOF(.data_dtcm);