/* * Linker script for vsyscall DSO. The vsyscall page is an ELF shared * object prelinked to its virtual address, and with only one read-only * segment (that fits in one page). This script controls its layout. */ #include <asm/asm-offsets.h> SECTIONS { . = VDSO_PRELINK_asm + 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) } /* This linker script is used both with -r and with -shared. For the layouts to match, we need to skip more than enough space for the dynamic symbol table et al. If this amount is insufficient, ld -shared will barf. Just increase it here. */ . = VDSO_PRELINK_asm + 0x400; .text : { *(.text) } :text =0x90909090 .note : { *(.note.*) } :text :note .eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr .eh_frame : { KEEP (*(.eh_frame)) } :text .dynamic : { *(.dynamic) } :text :dynamic .useless : { *(.got.plt) *(.got) *(.data .data.* .gnu.linkonce.d.*) *(.dynbss) *(.bss .bss.* .gnu.linkonce.b.*) } :text } /* * 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 0x6474e550; /* PT_GNU_EH_FRAME, but ld doesn't match the name */ } /* * This controls what symbols we export from the DSO. */ VERSION { LINUX_2.5 { global: __kernel_vsyscall; __kernel_sigreturn; __kernel_rt_sigreturn; local: *; }; } /* The ELF entry point can be used to set the AT_SYSINFO value. */ ENTRY(__kernel_vsyscall);