1 /* ld script to make s390 Linux kernel
2 * Written by Martin Schwidefsky (schwidefsky@de.ibm.com)
5 #include <asm/thread_info.h>
9 * Put .bss..swapper_pg_dir as the first thing in .bss. This will
10 * make sure it has 16k alignment.
12 #define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir)
14 /* Handle ro_after_init data on our own. */
15 #define RO_AFTER_INIT_DATA
17 #include <asm-generic/vmlinux.lds.h>
19 OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
20 OUTPUT_ARCH(s390:64-bit)
25 text PT_LOAD FLAGS(5); /* R_E */
26 data PT_LOAD FLAGS(7); /* RWE */
27 note PT_NOTE FLAGS(0); /* ___ */
34 /* Text and read-only data */
37 * E.g. perf doesn't like symbols starting at address zero,
38 * therefore skip the initial PSW and channel program located
39 * at address zero and let _text start at 0x200.
53 _etext = .; /* End of text section */
57 .dummy : { *(.dummy) } :data
59 RO_DATA_SECTION(PAGE_SIZE)
61 #ifdef CONFIG_SHARED_KERNEL
62 . = ALIGN(0x100000); /* VM shared segments are 1MB aligned */
66 _eshared = .; /* End of shareable data */
67 _sdata = .; /* Start of data section */
70 __start_ro_after_init = .;
71 __start_data_ro_after_init = .;
72 .data..ro_after_init : {
73 *(.data..ro_after_init)
75 __end_data_ro_after_init = .;
78 __end_ro_after_init = .;
80 RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE)
82 _edata = .; /* End of data section */
84 /* will be freed after init */
85 . = ALIGN(PAGE_SIZE); /* Init code and data */
88 INIT_TEXT_SECTION(PAGE_SIZE)
91 * .exit.text is discarded at runtime, not link time,
92 * to deal with references from __bug_table
103 * struct alt_inst entries. From the header (alternative.h):
104 * "Alternative instructions for different CPU types or capabilities"
105 * Think locking instructions on spinlocks.
106 * Note, that it is a part of __init region.
110 __alt_instructions = .;
112 __alt_instructions_end = .;
116 * And here are the replacement instructions. The linker sticks
117 * them as binary blobs. The .altinstructions has enough data to
118 * get the address and the length of them to patch the kernel safely.
119 * Note, that it is a part of __init region.
121 .altinstr_replacement : {
122 *(.altinstr_replacement)
126 * Table with the patch locations to undo expolines
128 .nospec_call_table : {
129 __nospec_call_start = . ;
131 __nospec_call_end = . ;
133 .nospec_return_table : {
134 __nospec_return_start = . ;
136 __nospec_return_end = . ;
139 /* early.c uses stsi, which requires page aligned data. */
140 . = ALIGN(PAGE_SIZE);
141 INIT_DATA_SECTION(0x100)
143 PERCPU_SECTION(0x100)
144 . = ALIGN(PAGE_SIZE);
145 __init_end = .; /* freed after init ends here */
147 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE)
151 /* Debugging sections. */
155 /* Sections to be discarded */