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 #if defined(CONFIG_STRICT_KERNEL_RWX) && !defined(CONFIG_PPC32)
16 #define STRICT_ALIGN_SIZE (1 << 24)
18 #define STRICT_ALIGN_SIZE PAGE_SIZE
24 kernel PT_LOAD FLAGS(7); /* RWX */
25 notes PT_NOTE FLAGS(0);
26 dummy PT_NOTE FLAGS(0);
28 /* binutils < 2.18 has a bug that makes it misbehave when taking an
29 ELF file with all segments at load address 0 as input. This
30 happens when running "strip" on vmlinux, because of the AT() magic
31 in this linker script. People using GCC >= 4.2 won't run into
32 this problem, because the "build-id" support will put some data
33 into the "notes" segment (at a non-zero load address).
35 To work around this, we force some data into both the "dummy"
36 segment and the kernel segment, so the dummy segment will get a
37 non-zero load address. It's not enough to always create the
38 "notes" segment, since if nothing gets assigned to it, its load
39 address will be zero. */
43 OUTPUT_ARCH(powerpc:common64)
46 OUTPUT_ARCH(powerpc:common)
47 jiffies = jiffies_64 + 4;
54 * Text, read only data and other permanent read-only sections
62 * This needs to be in its own output section to avoid ld placing
63 * branch trampoline stubs randomly throughout the fixed sections,
64 * which it will do (even if the branch comes from another section)
65 * in order to optimize stub generation.
67 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {
69 KEEP(*(.head.text.first_256B));
70 #ifdef CONFIG_PPC_BOOK3E
72 KEEP(*(.head.text.real_vectors));
73 *(.head.text.real_trampolines);
74 KEEP(*(.head.text.virt_vectors));
75 *(.head.text.virt_trampolines);
76 # if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
77 KEEP(*(.head.data.fwnmi_page));
80 #else /* !CONFIG_PPC64 */
89 * BLOCK(0) overrides the default output section alignment because
90 * this needs to start right after .head.text in order for fixed
91 * section placement to work.
93 .text BLOCK(0) : AT(ADDR(.text) - LOAD_OFFSET) {
94 #ifdef CONFIG_LD_HEAD_STUB_CATCH
95 KEEP(*(.linker_stub_catch));
100 .text : AT(ADDR(.text) - LOAD_OFFSET) {
103 /* careful! __ftr_alt_* sections need to be close to .text */
104 *(.text.hot TEXT_MAIN .text.fixup .text.unlikely .fixup __ftr_alt_* .ref.text);
106 *(.tramp.ftrace.text);
115 * -Os builds call FP save/restore functions. The powerpc64
116 * linker generates those on demand in the .sfpr section.
117 * .sfpr gets placed at the beginning of a group of input
118 * sections, which can break start-of-text offset if it is
119 * included with the main text sections, so put it by itself.
130 #endif /* CONFIG_PPC32 */
134 . = ALIGN(PAGE_SIZE);
136 PROVIDE32 (etext = .);
143 __stf_entry_barrier_fixup : AT(ADDR(__stf_entry_barrier_fixup) - LOAD_OFFSET) {
144 __start___stf_entry_barrier_fixup = .;
145 *(__stf_entry_barrier_fixup)
146 __stop___stf_entry_barrier_fixup = .;
150 __stf_exit_barrier_fixup : AT(ADDR(__stf_exit_barrier_fixup) - LOAD_OFFSET) {
151 __start___stf_exit_barrier_fixup = .;
152 *(__stf_exit_barrier_fixup)
153 __stop___stf_exit_barrier_fixup = .;
157 __rfi_flush_fixup : AT(ADDR(__rfi_flush_fixup) - LOAD_OFFSET) {
158 __start___rfi_flush_fixup = .;
160 __stop___rfi_flush_fixup = .;
162 #endif /* CONFIG_PPC64 */
164 #ifdef CONFIG_PPC_BARRIER_NOSPEC
166 __spec_barrier_fixup : AT(ADDR(__spec_barrier_fixup) - LOAD_OFFSET) {
167 __start___barrier_nospec_fixup = .;
168 *(__barrier_nospec_fixup)
169 __stop___barrier_nospec_fixup = .;
171 #endif /* CONFIG_PPC_BARRIER_NOSPEC */
173 #ifdef CONFIG_PPC_FSL_BOOK3E
175 __spec_btb_flush_fixup : AT(ADDR(__spec_btb_flush_fixup) - LOAD_OFFSET) {
176 __start__btb_flush_fixup = .;
178 __stop__btb_flush_fixup = .;
185 /* The dummy segment contents for the bug workaround mentioned above
187 .dummy : AT(ADDR(.dummy) - LOAD_OFFSET) {
194 * Init sections discarded at runtime
196 . = ALIGN(STRICT_ALIGN_SIZE);
198 . = ALIGN(PAGE_SIZE);
199 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
204 *(.tramp.ftrace.init);
208 /* .exit.text is discarded at runtime, not link time,
209 * to deal with references from __bug_table
211 .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
215 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
219 .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
223 .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
227 .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
232 __ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) {
233 __start___ftr_fixup = .;
235 __stop___ftr_fixup = .;
238 __mmu_ftr_fixup : AT(ADDR(__mmu_ftr_fixup) - LOAD_OFFSET) {
239 __start___mmu_ftr_fixup = .;
240 KEEP(*(__mmu_ftr_fixup))
241 __stop___mmu_ftr_fixup = .;
244 __lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) {
245 __start___lwsync_fixup = .;
246 KEEP(*(__lwsync_fixup))
247 __stop___lwsync_fixup = .;
251 __fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
252 __start___fw_ftr_fixup = .;
253 KEEP(*(__fw_ftr_fixup))
254 __stop___fw_ftr_fixup = .;
257 .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
261 PERCPU_SECTION(L1_CACHE_BYTES)
264 .machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) {
265 __machine_desc_start = . ;
266 KEEP(*(.machine.desc))
267 __machine_desc_end = . ;
269 #ifdef CONFIG_RELOCATABLE
271 .dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET)
274 __dynamic_symtab = .;
278 .dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) }
279 .dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET)
284 .hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
285 .interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
286 .rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
288 __rela_dyn_start = .;
292 /* .exit.data is discarded at runtime, not link time,
293 * to deal with references from .exit.text
295 .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
299 /* freed after init ends here */
300 . = ALIGN(PAGE_SIZE);
304 * And now the various read/write data
307 . = ALIGN(PAGE_SIZE);
311 .data : AT(ADDR(.data) - LOAD_OFFSET) {
314 *(.data..Lubsan_data*)
315 *(.data..Lubsan_type*)
324 .data : AT(ADDR(.data) - LOAD_OFFSET) {
331 .opd : AT(ADDR(.opd) - LOAD_OFFSET) {
338 .got : AT(ADDR(.got) - LOAD_OFFSET) {
340 #ifndef CONFIG_RELOCATABLE
341 __prom_init_toc_start = .;
342 arch/powerpc/kernel/prom_init.o*(.toc .got)
343 __prom_init_toc_end = .;
350 /* The initial task and kernel stack */
351 INIT_TASK_DATA_SECTION(THREAD_SIZE)
353 .data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) {
354 PAGE_ALIGNED_DATA(PAGE_SIZE)
357 .data..cacheline_aligned : AT(ADDR(.data..cacheline_aligned) - LOAD_OFFSET) {
358 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
361 .data..read_mostly : AT(ADDR(.data..read_mostly) - LOAD_OFFSET) {
362 READ_MOSTLY_DATA(L1_CACHE_BYTES)
365 . = ALIGN(PAGE_SIZE);
366 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
372 . = ALIGN(PAGE_SIZE);
374 PROVIDE32 (edata = .);
377 * And finally the bss
382 . = ALIGN(PAGE_SIZE);
393 *(.glink .iplt .plt .rela* .comment)