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 */
83 * If the build dies here, it's likely code in head_64.S is referencing
84 * labels it can't reach, and the linker inserting stubs without the
85 * assembler's knowledge. To debug, remove the above assert and
86 * rebuild. Look for branch stubs in the fixed section region.
88 * Linker stub generation could be allowed in "trampoline"
89 * sections if absolutely necessary, but this would require
90 * some rework of the fixed sections. Before resorting to this,
91 * consider references that have sufficient addressing range,
92 * (e.g., hand coded trampolines) so the linker does not have
95 * Linker stubs at the top of the main text section are currently not
96 * detected, and will result in a crash at boot due to offsets being
101 * BLOCK(0) overrides the default output section alignment because
102 * this needs to start right after .head.text in order for fixed
103 * section placement to work.
105 .text BLOCK(0) : AT(ADDR(.text) - LOAD_OFFSET) {
107 .text : AT(ADDR(.text) - LOAD_OFFSET) {
110 /* careful! __ftr_alt_* sections need to be close to .text */
111 *(.text .fixup __ftr_alt_* .ref.text)
126 #endif /* CONFIG_PPC32 */
130 . = ALIGN(PAGE_SIZE);
132 PROVIDE32 (etext = .);
141 /* The dummy segment contents for the bug workaround mentioned above
143 .dummy : AT(ADDR(.dummy) - LOAD_OFFSET) {
150 * Init sections discarded at runtime
152 . = ALIGN(PAGE_SIZE);
154 INIT_TEXT_SECTION(PAGE_SIZE) :kernel
156 /* .exit.text is discarded at runtime, not link time,
157 * to deal with references from __bug_table
159 .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
163 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
165 __vtop_table_begin = .;
167 __vtop_table_end = .;
168 __ptov_table_begin = .;
170 __ptov_table_end = .;
173 .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
177 .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
181 .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
188 __ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) {
189 __start___ftr_fixup = .;
191 __stop___ftr_fixup = .;
194 __mmu_ftr_fixup : AT(ADDR(__mmu_ftr_fixup) - LOAD_OFFSET) {
195 __start___mmu_ftr_fixup = .;
197 __stop___mmu_ftr_fixup = .;
200 __lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) {
201 __start___lwsync_fixup = .;
203 __stop___lwsync_fixup = .;
207 __fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
208 __start___fw_ftr_fixup = .;
210 __stop___fw_ftr_fixup = .;
213 .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
217 PERCPU_SECTION(L1_CACHE_BYTES)
220 .machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) {
221 __machine_desc_start = . ;
223 __machine_desc_end = . ;
225 #ifdef CONFIG_RELOCATABLE
227 .dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET)
230 __dynamic_symtab = .;
234 .dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) }
235 .dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET)
240 .hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
241 .interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
242 .rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
244 __rela_dyn_start = .;
248 /* .exit.data is discarded at runtime, not link time,
249 * to deal with references from .exit.text
251 .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
255 /* freed after init ends here */
256 . = ALIGN(PAGE_SIZE);
260 * And now the various read/write data
263 . = ALIGN(PAGE_SIZE);
267 .data : AT(ADDR(.data) - LOAD_OFFSET) {
273 .data : AT(ADDR(.data) - LOAD_OFFSET) {
280 .opd : AT(ADDR(.opd) - LOAD_OFFSET) {
285 .got : AT(ADDR(.got) - LOAD_OFFSET) {
287 #ifndef CONFIG_RELOCATABLE
288 __prom_init_toc_start = .;
289 arch/powerpc/kernel/prom_init.o*(.toc .got)
290 __prom_init_toc_end = .;
297 /* The initial task and kernel stack */
298 INIT_TASK_DATA_SECTION(THREAD_SIZE)
300 .data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) {
301 PAGE_ALIGNED_DATA(PAGE_SIZE)
304 .data..cacheline_aligned : AT(ADDR(.data..cacheline_aligned) - LOAD_OFFSET) {
305 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
308 .data..read_mostly : AT(ADDR(.data..read_mostly) - LOAD_OFFSET) {
309 READ_MOSTLY_DATA(L1_CACHE_BYTES)
312 . = ALIGN(PAGE_SIZE);
313 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
319 . = ALIGN(PAGE_SIZE);
321 PROVIDE32 (edata = .);
324 * And finally the bss
329 . = ALIGN(PAGE_SIZE);
333 /* Sections to be discarded. */