/*
* Linker script for vDSO . This is an ELF shared object prelinked to
* its virtual address , and with only one read - only segment .
* This script controls its layout .
*/
#if defined(BUILD_VDSO64)
# define SHDR_SIZE 64
#elif defined(BUILD_VDSO32)
# define SHDR_SIZE 40
#else
# error unknown VDSO target
#endif
#define NUM_FAKE_SHDRS 7
SECTIONS
{
/*
* User / kernel shared data is before the vDSO . This may be a little
* uglier than putting it after the vDSO , but it avoids issues with
* non - allocatable things that dangle past the end of the PT_LOAD
* segment . Page size is 8192 for both 64 - bit and 32 - bit vdso binaries
*/
vvar_start = . -8192 ;
vvar_data = vvar_start;
. = 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) }
.dynamic : { *(.dynamic) } :text :dynamic
.rodata : {
*(.rodata*)
*(.data *)
*(.sdata*)
*(.got.plt) *(.got)
*(.gnu.linkonce.d.*)
*(.bss*)
*(.dynbss*)
*(.gnu.linkonce.b.*)
/*
* Ideally this would live in a C file : kept in here for
* compatibility with x86 - 64 .
*/
VDSO_FAKE_SECTION_TABLE_START = .;
. = . + NUM_FAKE_SHDRS * SHDR_SIZE;
VDSO_FAKE_SECTION_TABLE_END = .;
} :text
.fake_shstrtab : { *(.fake_shstrtab) } :text
.note : { *(.note.*) } :text :note
.eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr
.eh_frame : { KEEP (*(.eh_frame)) } :text
/*
* Text is well - separated from actual data : there ' s plenty of
* stuff that isn ' t used at runtime in between .
*/
.text : { *(.text*) } :text =0 x90909090,
/DISCARD/ : {
*(.discard)
*(.discard.*)
*(__bug_table)
}
}
/*
* Very old versions of ld do not recognize this name token ; use the constant .
*/
#define PT_GNU_EH_FRAME 0 x6474e550
/*
* 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 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;
}
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(vorverarbeitet am 2026-09-28)
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