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root/arch/x86/vdso/vdso32/vdso32.lds.S

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/*
 * Linker script for 32-bit vDSO.
 * We #include the file to define the layout details.
 * Here we only choose the prelinked virtual address.
 *
 * This file defines the version script giving the user-exported symbols in
 * the DSO.  We can define local symbols here called VDSO* to make their
 * values visible using the asm-x86/vdso.h macros from the kernel proper.
 */

#define VDSO_PRELINK 0
#include "../vdso-layout.lds.S"

/* The ELF entry point can be used to set the AT_SYSINFO value.  */
ENTRY(__kernel_vsyscall);

/*
 * This controls what userland symbols we export from the vDSO.
 */
VERSION
{
        LINUX_2.5 {
        global:
                __kernel_vsyscall;
                __kernel_sigreturn;
                __kernel_rt_sigreturn;
        local: *;
        };
}

/*
 * Symbols we define here called VDSO* get their values into vdso32-syms.h.
 */
VDSO32_PRELINK          = VDSO_PRELINK;
VDSO32_vsyscall         = __kernel_vsyscall;
VDSO32_sigreturn        = __kernel_sigreturn;
VDSO32_rt_sigreturn     = __kernel_rt_sigreturn;

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