1 /* SPDX-License-Identifier: GPL-2.0 */
3 #define PROVIDE32(x) PROVIDE(__unused__##x)
5 #define PROVIDE32(x) PROVIDE(x)
8 #define BSS_FIRST_SECTIONS *(.bss.prominit)
11 #include <asm-generic/vmlinux.lds.h>
12 #include <asm/cache.h>
13 #include <asm/thread_info.h>
15 #define STRICT_ALIGN_SIZE (1 << CONFIG_DATA_SHIFT)
16 #define ETEXT_ALIGN_SIZE (1 << CONFIG_ETEXT_SHIFT)
21 kernel PT_LOAD FLAGS(7); /* RWX */
22 notes PT_NOTE FLAGS(0);
23 dummy PT_NOTE FLAGS(0);
25 /* binutils < 2.18 has a bug that makes it misbehave when taking an
26 ELF file with all segments at load address 0 as input. This
27 happens when running "strip" on vmlinux, because of the AT() magic
28 in this linker script. People using GCC >= 4.2 won't run into
29 this problem, because the "build-id" support will put some data
30 into the "notes" segment (at a non-zero load address).
32 To work around this, we force some data into both the "dummy"
33 segment and the kernel segment, so the dummy segment will get a
34 non-zero load address. It's not enough to always create the
35 "notes" segment, since if nothing gets assigned to it, its load
36 address will be zero. */
40 OUTPUT_ARCH(powerpc:common64)
43 OUTPUT_ARCH(powerpc:common)
44 jiffies = jiffies_64 + 4;
51 * Text, read only data and other permanent read-only sections
59 * This needs to be in its own output section to avoid ld placing
60 * branch trampoline stubs randomly throughout the fixed sections,
61 * which it will do (even if the branch comes from another section)
62 * in order to optimize stub generation.
64 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {
66 KEEP(*(.head.text.first_256B));
67 #ifdef CONFIG_PPC_BOOK3E
69 KEEP(*(.head.text.real_vectors));
70 *(.head.text.real_trampolines);
71 KEEP(*(.head.text.virt_vectors));
72 *(.head.text.virt_trampolines);
73 # if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
74 KEEP(*(.head.data.fwnmi_page));
77 #else /* !CONFIG_PPC64 */
86 * ALIGN(0) overrides the default output section alignment because
87 * this needs to start right after .head.text in order for fixed
88 * section placement to work.
90 .text ALIGN(0) : AT(ADDR(.text) - LOAD_OFFSET) {
91 #ifdef CONFIG_LD_HEAD_STUB_CATCH
92 KEEP(*(.linker_stub_catch));
97 .text : AT(ADDR(.text) - LOAD_OFFSET) {
100 /* careful! __ftr_alt_* sections need to be close to .text */
101 *(.text.hot TEXT_MAIN .text.fixup .text.unlikely .fixup __ftr_alt_* .ref.text);
103 *(.tramp.ftrace.text);
112 * -Os builds call FP save/restore functions. The powerpc64
113 * linker generates those on demand in the .sfpr section.
114 * .sfpr gets placed at the beginning of a group of input
115 * sections, which can break start-of-text offset if it is
116 * included with the main text sections, so put it by itself.
127 #endif /* CONFIG_PPC32 */
131 . = ALIGN(ETEXT_ALIGN_SIZE);
133 PROVIDE32 (etext = .);
140 __stf_entry_barrier_fixup : AT(ADDR(__stf_entry_barrier_fixup) - LOAD_OFFSET) {
141 __start___stf_entry_barrier_fixup = .;
142 *(__stf_entry_barrier_fixup)
143 __stop___stf_entry_barrier_fixup = .;
147 __stf_exit_barrier_fixup : AT(ADDR(__stf_exit_barrier_fixup) - LOAD_OFFSET) {
148 __start___stf_exit_barrier_fixup = .;
149 *(__stf_exit_barrier_fixup)
150 __stop___stf_exit_barrier_fixup = .;
154 __rfi_flush_fixup : AT(ADDR(__rfi_flush_fixup) - LOAD_OFFSET) {
155 __start___rfi_flush_fixup = .;
157 __stop___rfi_flush_fixup = .;
159 #endif /* CONFIG_PPC64 */
161 #ifdef CONFIG_PPC_BARRIER_NOSPEC
163 __spec_barrier_fixup : AT(ADDR(__spec_barrier_fixup) - LOAD_OFFSET) {
164 __start___barrier_nospec_fixup = .;
165 *(__barrier_nospec_fixup)
166 __stop___barrier_nospec_fixup = .;
168 #endif /* CONFIG_PPC_BARRIER_NOSPEC */
170 #ifdef CONFIG_PPC_FSL_BOOK3E
172 __spec_btb_flush_fixup : AT(ADDR(__spec_btb_flush_fixup) - LOAD_OFFSET) {
173 __start__btb_flush_fixup = .;
175 __stop__btb_flush_fixup = .;
182 /* The dummy segment contents for the bug workaround mentioned above
184 .dummy : AT(ADDR(.dummy) - LOAD_OFFSET) {
191 * Init sections discarded at runtime
193 . = ALIGN(STRICT_ALIGN_SIZE);
195 . = ALIGN(PAGE_SIZE);
196 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
201 *(.tramp.ftrace.init);
205 /* .exit.text is discarded at runtime, not link time,
206 * to deal with references from __bug_table
208 .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
212 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
216 .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
220 .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
224 .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
229 __ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) {
230 __start___ftr_fixup = .;
232 __stop___ftr_fixup = .;
235 __mmu_ftr_fixup : AT(ADDR(__mmu_ftr_fixup) - LOAD_OFFSET) {
236 __start___mmu_ftr_fixup = .;
237 KEEP(*(__mmu_ftr_fixup))
238 __stop___mmu_ftr_fixup = .;
241 __lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) {
242 __start___lwsync_fixup = .;
243 KEEP(*(__lwsync_fixup))
244 __stop___lwsync_fixup = .;
248 __fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
249 __start___fw_ftr_fixup = .;
250 KEEP(*(__fw_ftr_fixup))
251 __stop___fw_ftr_fixup = .;
254 .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
258 PERCPU_SECTION(L1_CACHE_BYTES)
261 .machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) {
262 __machine_desc_start = . ;
263 KEEP(*(.machine.desc))
264 __machine_desc_end = . ;
266 #ifdef CONFIG_RELOCATABLE
268 .dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET)
271 __dynamic_symtab = .;
275 .dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) }
276 .dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET)
281 .hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
282 .interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
283 .rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
285 __rela_dyn_start = .;
289 /* .exit.data is discarded at runtime, not link time,
290 * to deal with references from .exit.text
292 .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
296 /* freed after init ends here */
297 . = ALIGN(PAGE_SIZE);
301 * And now the various read/write data
304 . = ALIGN(PAGE_SIZE);
308 .data : AT(ADDR(.data) - LOAD_OFFSET) {
311 *(.data..Lubsan_data*)
312 *(.data..Lubsan_type*)
322 .data : AT(ADDR(.data) - LOAD_OFFSET) {
329 .opd : AT(ADDR(.opd) - LOAD_OFFSET) {
336 .got : AT(ADDR(.got) - LOAD_OFFSET) {
338 #ifndef CONFIG_RELOCATABLE
339 __prom_init_toc_start = .;
340 arch/powerpc/kernel/prom_init.o*(.toc .got)
341 __prom_init_toc_end = .;
348 /* The initial task and kernel stack */
349 INIT_TASK_DATA_SECTION(THREAD_SIZE)
351 .data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) {
352 PAGE_ALIGNED_DATA(PAGE_SIZE)
355 .data..cacheline_aligned : AT(ADDR(.data..cacheline_aligned) - LOAD_OFFSET) {
356 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
359 .data..read_mostly : AT(ADDR(.data..read_mostly) - LOAD_OFFSET) {
360 READ_MOSTLY_DATA(L1_CACHE_BYTES)
363 . = ALIGN(PAGE_SIZE);
364 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
370 . = ALIGN(PAGE_SIZE);
372 PROVIDE32 (edata = .);
375 * And finally the bss
380 . = ALIGN(PAGE_SIZE);
391 *(.glink .iplt .plt .rela* .comment)