2 #define PROVIDE32(x) PROVIDE(__unused__##x)
4 #define PROVIDE32(x) PROVIDE(x)
7 #include <asm-generic/vmlinux.lds.h>
9 #include <asm/thread_info.h>
14 kernel PT_LOAD FLAGS(7); /* RWX */
15 notes PT_NOTE FLAGS(0);
16 dummy PT_NOTE FLAGS(0);
18 /* binutils < 2.18 has a bug that makes it misbehave when taking an
19 ELF file with all segments at load address 0 as input. This
20 happens when running "strip" on vmlinux, because of the AT() magic
21 in this linker script. People using GCC >= 4.2 won't run into
22 this problem, because the "build-id" support will put some data
23 into the "notes" segment (at a non-zero load address).
25 To work around this, we force some data into both the "dummy"
26 segment and the kernel segment, so the dummy segment will get a
27 non-zero load address. It's not enough to always create the
28 "notes" segment, since if nothing gets assigned to it, its load
29 address will be zero. */
33 OUTPUT_ARCH(powerpc:common64)
36 OUTPUT_ARCH(powerpc:common)
37 jiffies = jiffies_64 + 4;
44 * Text, read only data and other permanent read-only sections
52 * This needs to be in its own output section to avoid ld placing
53 * branch trampoline stubs randomly throughout the fixed sections,
54 * which it will do (even if the branch comes from another section)
55 * in order to optimize stub generation.
57 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {
59 KEEP(*(.head.text.first_256B));
60 #ifdef CONFIG_PPC_BOOK3E
61 # define END_FIXED 0x100
63 KEEP(*(.head.text.real_vectors));
64 *(.head.text.real_trampolines);
65 KEEP(*(.head.text.virt_vectors));
66 *(.head.text.virt_trampolines);
67 # if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
68 KEEP(*(.head.data.fwnmi_page));
69 # define END_FIXED 0x8000
71 # define END_FIXED 0x7000
74 ASSERT((. == END_FIXED), "vmlinux.lds.S: fixed section overflow error");
75 #else /* !CONFIG_PPC64 */
81 * If the build dies here, it's likely code in head_64.S is referencing
82 * labels it can't reach, and the linker inserting stubs without the
83 * assembler's knowledge. To debug, remove the above assert and
84 * rebuild. Look for branch stubs in the fixed section region.
86 * Linker stub generation could be allowed in "trampoline"
87 * sections if absolutely necessary, but this would require
88 * some rework of the fixed sections. Before resorting to this,
89 * consider references that have sufficient addressing range,
90 * (e.g., hand coded trampolines) so the linker does not have
93 * Linker stubs at the top of the main text section are currently not
94 * detected, and will result in a crash at boot due to offsets being
99 * BLOCK(0) overrides the default output section alignment because
100 * this needs to start right after .head.text in order for fixed
101 * section placement to work.
103 .text BLOCK(0) : AT(ADDR(.text) - LOAD_OFFSET) {
105 .text : AT(ADDR(.text) - LOAD_OFFSET) {
108 /* careful! __ftr_alt_* sections need to be close to .text */
109 *(.text .fixup __ftr_alt_* .ref.text)
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 __uaccess_flush_fixup : AT(ADDR(__uaccess_flush_fixup) - LOAD_OFFSET) {
145 __start___uaccess_flush_fixup = .;
146 *(__uaccess_flush_fixup)
147 __stop___uaccess_flush_fixup = .;
151 __entry_flush_fixup : AT(ADDR(__entry_flush_fixup) - LOAD_OFFSET) {
152 __start___entry_flush_fixup = .;
153 *(__entry_flush_fixup)
154 __stop___entry_flush_fixup = .;
158 __stf_exit_barrier_fixup : AT(ADDR(__stf_exit_barrier_fixup) - LOAD_OFFSET) {
159 __start___stf_exit_barrier_fixup = .;
160 *(__stf_exit_barrier_fixup)
161 __stop___stf_exit_barrier_fixup = .;
165 __rfi_flush_fixup : AT(ADDR(__rfi_flush_fixup) - LOAD_OFFSET) {
166 __start___rfi_flush_fixup = .;
168 __stop___rfi_flush_fixup = .;
170 #endif /* CONFIG_PPC64 */
172 #ifdef CONFIG_PPC_BARRIER_NOSPEC
174 __spec_barrier_fixup : AT(ADDR(__spec_barrier_fixup) - LOAD_OFFSET) {
175 __start___barrier_nospec_fixup = .;
176 *(__barrier_nospec_fixup)
177 __stop___barrier_nospec_fixup = .;
179 #endif /* CONFIG_PPC_BARRIER_NOSPEC */
181 #ifdef CONFIG_PPC_FSL_BOOK3E
183 __spec_btb_flush_fixup : AT(ADDR(__spec_btb_flush_fixup) - LOAD_OFFSET) {
184 __start__btb_flush_fixup = .;
186 __stop__btb_flush_fixup = .;
193 /* The dummy segment contents for the bug workaround mentioned above
195 .dummy : AT(ADDR(.dummy) - LOAD_OFFSET) {
202 * Init sections discarded at runtime
204 . = ALIGN(PAGE_SIZE);
206 INIT_TEXT_SECTION(PAGE_SIZE) :kernel
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) {
217 __vtop_table_begin = .;
219 __vtop_table_end = .;
220 __ptov_table_begin = .;
222 __ptov_table_end = .;
225 .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
229 .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
233 .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
240 __ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) {
241 __start___ftr_fixup = .;
243 __stop___ftr_fixup = .;
246 __mmu_ftr_fixup : AT(ADDR(__mmu_ftr_fixup) - LOAD_OFFSET) {
247 __start___mmu_ftr_fixup = .;
249 __stop___mmu_ftr_fixup = .;
252 __lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) {
253 __start___lwsync_fixup = .;
255 __stop___lwsync_fixup = .;
259 __fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
260 __start___fw_ftr_fixup = .;
262 __stop___fw_ftr_fixup = .;
265 .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
269 PERCPU_SECTION(L1_CACHE_BYTES)
272 .machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) {
273 __machine_desc_start = . ;
275 __machine_desc_end = . ;
277 #ifdef CONFIG_RELOCATABLE
279 .dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET)
282 __dynamic_symtab = .;
286 .dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) }
287 .dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET)
292 .hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
293 .interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
294 .rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
296 __rela_dyn_start = .;
300 /* .exit.data is discarded at runtime, not link time,
301 * to deal with references from .exit.text
303 .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
307 /* freed after init ends here */
308 . = ALIGN(PAGE_SIZE);
312 * And now the various read/write data
315 . = ALIGN(PAGE_SIZE);
319 .data : AT(ADDR(.data) - LOAD_OFFSET) {
325 .data : AT(ADDR(.data) - LOAD_OFFSET) {
332 #ifdef CONFIG_DEBUG_INFO_BTF
333 .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) {
338 .opd : AT(ADDR(.opd) - LOAD_OFFSET) {
343 .got : AT(ADDR(.got) - LOAD_OFFSET) {
345 #ifndef CONFIG_RELOCATABLE
346 __prom_init_toc_start = .;
347 arch/powerpc/kernel/prom_init.o*(.toc .got)
348 __prom_init_toc_end = .;
355 /* The initial task and kernel stack */
356 INIT_TASK_DATA_SECTION(THREAD_SIZE)
358 .data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) {
359 PAGE_ALIGNED_DATA(PAGE_SIZE)
362 .data..cacheline_aligned : AT(ADDR(.data..cacheline_aligned) - LOAD_OFFSET) {
363 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
366 .data..read_mostly : AT(ADDR(.data..read_mostly) - LOAD_OFFSET) {
367 READ_MOSTLY_DATA(L1_CACHE_BYTES)
370 . = ALIGN(PAGE_SIZE);
371 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
375 . = ALIGN(PAGE_SIZE);
377 PROVIDE32 (edata = .);
380 * And finally the bss
385 . = ALIGN(PAGE_SIZE);
389 /* Sections to be discarded. */