1 /* SPDX-License-Identifier: GPL-2.0 */
3 #define PROVIDE32(x) PROVIDE(__unused__##x)
5 #define PROVIDE32(x) PROVIDE(x)
8 #include <asm-generic/vmlinux.lds.h>
10 #include <asm/thread_info.h>
12 #if defined(CONFIG_STRICT_KERNEL_RWX) && !defined(CONFIG_PPC32)
13 #define STRICT_ALIGN_SIZE (1 << 24)
15 #define STRICT_ALIGN_SIZE PAGE_SIZE
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 * BLOCK(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 BLOCK(0) : AT(ADDR(.text) - LOAD_OFFSET) {
91 #ifdef CONFIG_LD_HEAD_STUB_CATCH
92 *(.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 .text.fixup .text.unlikely .fixup __ftr_alt_* .ref.text);
109 * -Os builds call FP save/restore functions. The powerpc64
110 * linker generates those on demand in the .sfpr section.
111 * .sfpr gets placed at the beginning of a group of input
112 * sections, which can break start-of-text offset if it is
113 * included with the main text sections, so put it by itself.
124 #endif /* CONFIG_PPC32 */
128 . = ALIGN(PAGE_SIZE);
130 PROVIDE32 (etext = .);
137 __stf_entry_barrier_fixup : AT(ADDR(__stf_entry_barrier_fixup) - LOAD_OFFSET) {
138 __start___stf_entry_barrier_fixup = .;
139 *(__stf_entry_barrier_fixup)
140 __stop___stf_entry_barrier_fixup = .;
144 __stf_exit_barrier_fixup : AT(ADDR(__stf_exit_barrier_fixup) - LOAD_OFFSET) {
145 __start___stf_exit_barrier_fixup = .;
146 *(__stf_exit_barrier_fixup)
147 __stop___stf_exit_barrier_fixup = .;
151 __rfi_flush_fixup : AT(ADDR(__rfi_flush_fixup) - LOAD_OFFSET) {
152 __start___rfi_flush_fixup = .;
154 __stop___rfi_flush_fixup = .;
162 /* The dummy segment contents for the bug workaround mentioned above
164 .dummy : AT(ADDR(.dummy) - LOAD_OFFSET) {
171 * Init sections discarded at runtime
173 . = ALIGN(STRICT_ALIGN_SIZE);
175 INIT_TEXT_SECTION(PAGE_SIZE) :kernel
177 /* .exit.text is discarded at runtime, not link time,
178 * to deal with references from __bug_table
180 .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
184 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
186 __vtop_table_begin = .;
188 __vtop_table_end = .;
189 __ptov_table_begin = .;
191 __ptov_table_end = .;
194 .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
198 .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
202 .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
209 __ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) {
210 __start___ftr_fixup = .;
212 __stop___ftr_fixup = .;
215 __mmu_ftr_fixup : AT(ADDR(__mmu_ftr_fixup) - LOAD_OFFSET) {
216 __start___mmu_ftr_fixup = .;
218 __stop___mmu_ftr_fixup = .;
221 __lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) {
222 __start___lwsync_fixup = .;
224 __stop___lwsync_fixup = .;
228 __fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
229 __start___fw_ftr_fixup = .;
231 __stop___fw_ftr_fixup = .;
234 .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
238 PERCPU_SECTION(L1_CACHE_BYTES)
241 .machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) {
242 __machine_desc_start = . ;
244 __machine_desc_end = . ;
246 #ifdef CONFIG_RELOCATABLE
248 .dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET)
251 __dynamic_symtab = .;
255 .dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) }
256 .dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET)
261 .hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
262 .interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
263 .rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
265 __rela_dyn_start = .;
269 /* .exit.data is discarded at runtime, not link time,
270 * to deal with references from .exit.text
272 .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
276 /* freed after init ends here */
277 . = ALIGN(PAGE_SIZE);
281 * And now the various read/write data
284 . = ALIGN(PAGE_SIZE);
288 .data : AT(ADDR(.data) - LOAD_OFFSET) {
297 .data : AT(ADDR(.data) - LOAD_OFFSET) {
304 .opd : AT(ADDR(.opd) - LOAD_OFFSET) {
311 .got : AT(ADDR(.got) - LOAD_OFFSET) {
313 #ifndef CONFIG_RELOCATABLE
314 __prom_init_toc_start = .;
315 arch/powerpc/kernel/prom_init.o*(.toc .got)
316 __prom_init_toc_end = .;
323 /* The initial task and kernel stack */
324 INIT_TASK_DATA_SECTION(THREAD_SIZE)
326 .data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) {
327 PAGE_ALIGNED_DATA(PAGE_SIZE)
330 .data..cacheline_aligned : AT(ADDR(.data..cacheline_aligned) - LOAD_OFFSET) {
331 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
334 .data..read_mostly : AT(ADDR(.data..read_mostly) - LOAD_OFFSET) {
335 READ_MOSTLY_DATA(L1_CACHE_BYTES)
338 . = ALIGN(PAGE_SIZE);
339 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
345 . = ALIGN(PAGE_SIZE);
347 PROVIDE32 (edata = .);
350 * And finally the bss
355 . = ALIGN(PAGE_SIZE);
366 *(.glink .iplt .plt .rela* .comment)