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-rw-r--r--vdso/vdso_amd64.lds102
1 files changed, 0 insertions, 102 deletions
diff --git a/vdso/vdso_amd64.lds b/vdso/vdso_amd64.lds
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index d114290da..000000000
--- a/vdso/vdso_amd64.lds
+++ /dev/null
@@ -1,102 +0,0 @@
-/*
- * Linker script for the VDSO.
- *
- * The VDSO is essentially a normal ELF shared library that is mapped into the
- * address space of the process that is going to use it. The address of the
- * VDSO is passed to the runtime linker in the AT_SYSINFO_EHDR entry of the aux
- * vector.
- *
- * There are, however, three ways in which the VDSO differs from a normal
- * shared library:
- *
- * - The runtime linker does not attempt to process any relocations for the
- * VDSO so it is the responsibility of whoever loads the VDSO into the
- * address space to do this if necessary. Because of this restriction we are
- * careful to ensure that the VDSO does not need to have any relocations
- * applied to it.
- *
- * - Although the VDSO is position independent and would normally be linked at
- * virtual address 0, the Linux kernel VDSO is actually linked at a non zero
- * virtual address and the code in the system runtime linker that handles the
- * VDSO expects this to be the case so we have to explicitly link this VDSO
- * at a non zero address. The actual address is arbitrary, but we use the
- * same one as the Linux kernel VDSO.
- *
- * - The VDSO will be directly mmapped by the sentry, rather than going through
- * a normal ELF loading process. The VDSO must be carefully constructed such
- * that the layout in the ELF file is identical to the layout in memory.
- */
-
-VDSO_PRELINK = 0xffffffffff700000;
-
-SECTIONS {
- /* The parameter page is mapped just before the VDSO. */
- _params = VDSO_PRELINK - 0x1000;
-
- . = VDSO_PRELINK + 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
-
- .eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr
- .eh_frame : { KEEP (*(.eh_frame)) } :text
-
- .dynamic : { *(.dynamic) } :text :dynamic
-
- .rodata : { *(.rodata*) } :text
-
- .altinstructions : { *(.altinstructions) }
- .altinstr_replacement : { *(.altinstr_replacement) }
-
- /*
- * TODO(gvisor.dev/issue/157): Remove this alignment? Then the VDSO would fit
- * in a single page.
- */
- . = ALIGN(0x1000);
- .text : { *(.text*) } :text =0x90909090
-
- /*
- * N.B. There is no data/bss section. This VDSO neither needs nor uses a data
- * section. We omit it entirely because some gcc/clang and gold/bfd version
- * combinations struggle to handle an empty data PHDR segment (internal
- * linker assertion failures result).
- *
- * If the VDSO does incorrectly include a data section, the linker will
- * include it in the text segment. check_vdso.py looks for this degenerate
- * case.
- */
-}
-
-PHDRS {
- text PT_LOAD FLAGS(5) FILEHDR PHDRS; /* 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;
-}
-
-/*
- * Define the symbols that are to be exported.
- */
-VERSION {
- LINUX_2.6 {
- global:
- clock_gettime;
- __vdso_clock_gettime;
- gettimeofday;
- __vdso_gettimeofday;
- getcpu;
- __vdso_getcpu;
- time;
- __vdso_time;
- __kernel_rt_sigreturn;
-
- local: *;
- };
-}