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 = .);
139 /* The dummy segment contents for the bug workaround mentioned above
141 .dummy : AT(ADDR(.dummy) - LOAD_OFFSET) {
148 * Init sections discarded at runtime
150 . = ALIGN(PAGE_SIZE);
152 INIT_TEXT_SECTION(PAGE_SIZE) :kernel
154 /* .exit.text is discarded at runtime, not link time,
155 * to deal with references from __bug_table
157 .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
161 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
163 __vtop_table_begin = .;
165 __vtop_table_end = .;
166 __ptov_table_begin = .;
168 __ptov_table_end = .;
171 .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
175 .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
179 .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
186 __ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) {
187 __start___ftr_fixup = .;
189 __stop___ftr_fixup = .;
192 __mmu_ftr_fixup : AT(ADDR(__mmu_ftr_fixup) - LOAD_OFFSET) {
193 __start___mmu_ftr_fixup = .;
195 __stop___mmu_ftr_fixup = .;
198 __lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) {
199 __start___lwsync_fixup = .;
201 __stop___lwsync_fixup = .;
205 __fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
206 __start___fw_ftr_fixup = .;
208 __stop___fw_ftr_fixup = .;
211 .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
215 PERCPU_SECTION(L1_CACHE_BYTES)
218 .machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) {
219 __machine_desc_start = . ;
221 __machine_desc_end = . ;
223 #ifdef CONFIG_RELOCATABLE
225 .dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET)
228 __dynamic_symtab = .;
232 .dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) }
233 .dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET)
238 .hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
239 .interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
240 .rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
242 __rela_dyn_start = .;
246 /* .exit.data is discarded at runtime, not link time,
247 * to deal with references from .exit.text
249 .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
253 /* freed after init ends here */
254 . = ALIGN(PAGE_SIZE);
258 * And now the various read/write data
261 . = ALIGN(PAGE_SIZE);
265 .data : AT(ADDR(.data) - LOAD_OFFSET) {
271 .data : AT(ADDR(.data) - LOAD_OFFSET) {
278 .opd : AT(ADDR(.opd) - LOAD_OFFSET) {
283 .got : AT(ADDR(.got) - LOAD_OFFSET) {
285 #ifndef CONFIG_RELOCATABLE
286 __prom_init_toc_start = .;
287 arch/powerpc/kernel/prom_init.o*(.toc .got)
288 __prom_init_toc_end = .;
295 /* The initial task and kernel stack */
296 INIT_TASK_DATA_SECTION(THREAD_SIZE)
298 .data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) {
299 PAGE_ALIGNED_DATA(PAGE_SIZE)
302 .data..cacheline_aligned : AT(ADDR(.data..cacheline_aligned) - LOAD_OFFSET) {
303 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
306 .data..read_mostly : AT(ADDR(.data..read_mostly) - LOAD_OFFSET) {
307 READ_MOSTLY_DATA(L1_CACHE_BYTES)
310 . = ALIGN(PAGE_SIZE);
311 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
317 . = ALIGN(PAGE_SIZE);
319 PROVIDE32 (edata = .);
322 * And finally the bss
327 . = ALIGN(PAGE_SIZE);
331 /* Sections to be discarded. */