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TOMOYO Linux Cross Reference
Linux/arch/s390/kernel/vdso64/vdso64.lds.S

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 /*
  3  * This is the infamous ld script for the 64 bits vdso
  4  * library
  5  */
  6 
  7 #include <asm/vdso/vsyscall.h>
  8 #include <asm/page.h>
  9 #include <asm/vdso.h>
 10 
 11 OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
 12 OUTPUT_ARCH(s390:64-bit)
 13 
 14 SECTIONS
 15 {
 16         PROVIDE(_vdso_data = . - __VVAR_PAGES * PAGE_SIZE);
 17         PROVIDE(_vdso_rng_data = _vdso_data + __VDSO_RND_DATA_OFFSET);
 18 #ifdef CONFIG_TIME_NS
 19         PROVIDE(_timens_data = _vdso_data + PAGE_SIZE);
 20 #endif
 21         . = VDSO_LBASE + SIZEOF_HEADERS;
 22 
 23         .hash           : { *(.hash) }                  :text
 24         .gnu.hash       : { *(.gnu.hash) }
 25         .dynsym         : { *(.dynsym) }
 26         .dynstr         : { *(.dynstr) }
 27         .gnu.version    : { *(.gnu.version) }
 28         .gnu.version_d  : { *(.gnu.version_d) }
 29         .gnu.version_r  : { *(.gnu.version_r) }
 30 
 31         .note           : { *(.note.*) }                :text   :note
 32 
 33         . = ALIGN(16);
 34         .text           : {
 35                 *(.text .stub .text.* .gnu.linkonce.t.*)
 36         } :text
 37         PROVIDE(__etext = .);
 38         PROVIDE(_etext = .);
 39         PROVIDE(etext = .);
 40 
 41         /*
 42          * Other stuff is appended to the text segment:
 43          */
 44         .rodata         : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
 45         .rodata1        : { *(.rodata1) }
 46 
 47         . = ALIGN(8);
 48         .altinstructions        : { *(.altinstructions) }
 49         .altinstr_replacement   : { *(.altinstr_replacement) }
 50 
 51         .dynamic        : { *(.dynamic) }               :text   :dynamic
 52 
 53         .eh_frame_hdr   : { *(.eh_frame_hdr) }          :text   :eh_frame_hdr
 54         .eh_frame       : { KEEP (*(.eh_frame)) }       :text
 55         .gcc_except_table : { *(.gcc_except_table .gcc_except_table.*) }
 56 
 57         .rela.dyn ALIGN(8) : { *(.rela.dyn) }
 58         .got ALIGN(8)   : { *(.got .toc) }
 59         .got.plt ALIGN(8) : { *(.got.plt) }
 60 
 61         _end = .;
 62         PROVIDE(end = .);
 63 
 64         /*
 65          * Stabs debugging sections are here too.
 66          */
 67         .stab          0 : { *(.stab) }
 68         .stabstr       0 : { *(.stabstr) }
 69         .stab.excl     0 : { *(.stab.excl) }
 70         .stab.exclstr  0 : { *(.stab.exclstr) }
 71         .stab.index    0 : { *(.stab.index) }
 72         .stab.indexstr 0 : { *(.stab.indexstr) }
 73         .comment       0 : { *(.comment) }
 74 
 75         /*
 76          * DWARF debug sections.
 77          * Symbols in the DWARF debugging sections are relative to the
 78          * beginning of the section so we begin them at 0.
 79          */
 80         /* DWARF 1 */
 81         .debug          0 : { *(.debug) }
 82         .line           0 : { *(.line) }
 83         /* GNU DWARF 1 extensions */
 84         .debug_srcinfo  0 : { *(.debug_srcinfo) }
 85         .debug_sfnames  0 : { *(.debug_sfnames) }
 86         /* DWARF 1.1 and DWARF 2 */
 87         .debug_aranges  0 : { *(.debug_aranges) }
 88         .debug_pubnames 0 : { *(.debug_pubnames) }
 89         /* DWARF 2 */
 90         .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
 91         .debug_abbrev   0 : { *(.debug_abbrev) }
 92         .debug_line     0 : { *(.debug_line) }
 93         .debug_frame    0 : { *(.debug_frame) }
 94         .debug_str      0 : { *(.debug_str) }
 95         .debug_loc      0 : { *(.debug_loc) }
 96         .debug_macinfo  0 : { *(.debug_macinfo) }
 97         /* SGI/MIPS DWARF 2 extensions */
 98         .debug_weaknames 0 : { *(.debug_weaknames) }
 99         .debug_funcnames 0 : { *(.debug_funcnames) }
100         .debug_typenames 0 : { *(.debug_typenames) }
101         .debug_varnames  0 : { *(.debug_varnames) }
102         /* DWARF 3 */
103         .debug_pubtypes 0 : { *(.debug_pubtypes) }
104         .debug_ranges   0 : { *(.debug_ranges) }
105         .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
106 
107         /DISCARD/       : {
108                 *(.note.GNU-stack)
109                 *(.branch_lt)
110                 *(.data .data.* .gnu.linkonce.d.* .sdata*)
111                 *(.bss .sbss .dynbss .dynsbss)
112         }
113 }
114 
115 /*
116  * Very old versions of ld do not recognize this name token; use the constant.
117  */
118 #define PT_GNU_EH_FRAME 0x6474e550
119 
120 /*
121  * We must supply the ELF program headers explicitly to get just one
122  * PT_LOAD segment, and set the flags explicitly to make segments read-only.
123  */
124 PHDRS
125 {
126         text            PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
127         dynamic         PT_DYNAMIC FLAGS(4);            /* PF_R */
128         note            PT_NOTE FLAGS(4);               /* PF_R */
129         eh_frame_hdr    PT_GNU_EH_FRAME;
130 }
131 
132 /*
133  * This controls what symbols we export from the DSO.
134  */
135 VERSION
136 {
137         VDSO_VERSION_STRING {
138         global:
139                 /*
140                  * Has to be there for the kernel to find
141                  */
142                 __kernel_gettimeofday;
143                 __kernel_clock_gettime;
144                 __kernel_clock_getres;
145                 __kernel_getcpu;
146                 __kernel_restart_syscall;
147                 __kernel_rt_sigreturn;
148                 __kernel_sigreturn;
149                 __kernel_getrandom;
150         local: *;
151         };
152 }

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