[S390] introduce vdso on s390

[linux-2.6-microblaze.git] / arch / s390 / kernel / vdso64 / vdso64.lds.S

diff --git a/arch/s390/kernel/vdso64/vdso64.lds.S b/arch/s390/kernel/vdso64/vdso64.lds.S
new file mode 100644 (file)
index 0000000..9f5979d
--- /dev/null
+++ b/arch/s390/kernel/vdso64/vdso64.lds.S
@@ -0,0 +1,138 @@
+/*
+ * This is the infamous ld script for the 64 bits vdso
+ * library
+ */
+#include <asm/vdso.h>
+
+OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
+OUTPUT_ARCH(s390:64-bit)
+ENTRY(_start)
+
+SECTIONS
+{
+       . = VDSO64_LBASE + SIZEOF_HEADERS;
+
+       .hash           : { *(.hash) }                  :text
+       .gnu.hash       : { *(.gnu.hash) }
+       .dynsym         : { *(.dynsym) }
+       .dynstr         : { *(.dynstr) }
+       .gnu.version    : { *(.gnu.version) }
+       .gnu.version_d  : { *(.gnu.version_d) }
+       .gnu.version_r  : { *(.gnu.version_r) }
+
+       .note           : { *(.note.*) }                :text   :note
+
+       . = ALIGN(16);
+       .text           : {
+               *(.text .stub .text.* .gnu.linkonce.t.*)
+       } :text
+       PROVIDE(__etext = .);
+       PROVIDE(_etext = .);
+       PROVIDE(etext = .);
+
+       /*
+        * Other stuff is appended to the text segment:
+        */
+       .rodata         : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
+       .rodata1        : { *(.rodata1) }
+
+       .dynamic        : { *(.dynamic) }               :text   :dynamic
+
+       .eh_frame_hdr   : { *(.eh_frame_hdr) }          :text   :eh_frame_hdr
+       .eh_frame       : { KEEP (*(.eh_frame)) }       :text
+       .gcc_except_table : { *(.gcc_except_table .gcc_except_table.*) }
+
+       .rela.dyn ALIGN(8) : { *(.rela.dyn) }
+       .got ALIGN(8)   : { *(.got .toc) }
+
+       _end = .;
+       PROVIDE(end = .);
+
+       /*
+        * Stabs debugging sections are here too.
+        */
+       .stab          0 : { *(.stab) }
+       .stabstr       0 : { *(.stabstr) }
+       .stab.excl     0 : { *(.stab.excl) }
+       .stab.exclstr  0 : { *(.stab.exclstr) }
+       .stab.index    0 : { *(.stab.index) }
+       .stab.indexstr 0 : { *(.stab.indexstr) }
+       .comment       0 : { *(.comment) }
+
+       /*
+        * DWARF debug sections.
+        * Symbols in the DWARF debugging sections are relative to the
+        * beginning of the section so we begin them at 0.
+        */
+       /* DWARF 1 */
+       .debug          0 : { *(.debug) }
+       .line           0 : { *(.line) }
+       /* GNU DWARF 1 extensions */
+       .debug_srcinfo  0 : { *(.debug_srcinfo) }
+       .debug_sfnames  0 : { *(.debug_sfnames) }
+       /* DWARF 1.1 and DWARF 2 */
+       .debug_aranges  0 : { *(.debug_aranges) }
+       .debug_pubnames 0 : { *(.debug_pubnames) }
+       /* DWARF 2 */
+       .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
+       .debug_abbrev   0 : { *(.debug_abbrev) }
+       .debug_line     0 : { *(.debug_line) }
+       .debug_frame    0 : { *(.debug_frame) }
+       .debug_str      0 : { *(.debug_str) }
+       .debug_loc      0 : { *(.debug_loc) }
+       .debug_macinfo  0 : { *(.debug_macinfo) }
+       /* SGI/MIPS DWARF 2 extensions */
+       .debug_weaknames 0 : { *(.debug_weaknames) }
+       .debug_funcnames 0 : { *(.debug_funcnames) }
+       .debug_typenames 0 : { *(.debug_typenames) }
+       .debug_varnames  0 : { *(.debug_varnames) }
+       /* DWARF 3 */
+       .debug_pubtypes 0 : { *(.debug_pubtypes) }
+       .debug_ranges   0 : { *(.debug_ranges) }
+       .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
+
+       . = ALIGN(4096);
+       PROVIDE(_vdso_data = .);
+
+       /DISCARD/       : {
+               *(.note.GNU-stack)
+               *(.branch_lt)
+               *(.data .data.* .gnu.linkonce.d.* .sdata*)
+               *(.bss .sbss .dynbss .dynsbss)
+       }
+}
+
+/*
+ * Very old versions of ld do not recognize this name token; use the constant.
+ */
+#define PT_GNU_EH_FRAME        0x6474e550
+
+/*
+ * We must supply the ELF program headers explicitly to get just one
+ * PT_LOAD segment, and set the flags explicitly to make segments read-only.
+ */
+PHDRS
+{
+       text            PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
+       dynamic         PT_DYNAMIC FLAGS(4);            /* PF_R */
+       note            PT_NOTE FLAGS(4);               /* PF_R */
+       eh_frame_hdr    PT_GNU_EH_FRAME;
+}
+
+/*
+ * This controls what symbols we export from the DSO.
+ */
+VERSION
+{
+       VDSO_VERSION_STRING {
+       global:
+               /*
+                * Has to be there for the kernel to find
+                */
+               __kernel_gettimeofday;
+               __kernel_clock_gettime;
+               __kernel_clock_getres;
+
+       local: *;
+       };
+}