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linux/arch/x86/vdso/vdsox32.lds.S

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x32: Add x32 VDSO support Add support for the x32 VDSO. The x32 VDSO takes advantage of the similarity between the x86-64 and the x32 ABIs to contain the same content, only the container is different, as the x32 VDSO obviously is an x32 shared object. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-02-20 03:38:06 +08:00
/*
* Linker script for x32 vDSO.
* We #include the file to define the layout details.
*
* This file defines the version script giving the user-exported symbols in
x86, vdso: Remove vestiges of VDSO_PRELINK and some outdated comments These definitions had no effect. Signed-off-by: Andy Lutomirski <luto@amacapital.net> Link: http://lkml.kernel.org/r/946c104e40c47319f8ab406e54118799cb55bd99.1399317206.git.luto@amacapital.net Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-05-06 03:19:37 +08:00
* the DSO.
x32: Add x32 VDSO support Add support for the x32 VDSO. The x32 VDSO takes advantage of the similarity between the x86-64 and the x32 ABIs to contain the same content, only the container is different, as the x32 VDSO obviously is an x32 shared object. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-02-20 03:38:06 +08:00
*/
x86/vdso: Improve the fake section headers Fully stripping the vDSO has other unfortunate side effects: - binutils is unable to find ELF notes without a SHT_NOTE section. - Even elfutils has trouble: it can find ELF notes without a section table at all, but if a section table is present, it won't look for PT_NOTE. - gdb wants section names to match between stripped DSOs and their symbols; otherwise it will corrupt symbol addresses. We're also breaking the rules: section 0 is supposed to be SHT_NULL. Fix these problems by building a better fake section table. While we're at it, we might as well let buggy Go versions keep working well by giving the SHT_DYNSYM entry the correct size. This is a bit unfortunate: it adds quite a bit of size to the vdso image. If/when binutils improves and the improved versions become widespread, it would be worth considering dropping most of this. Signed-off-by: Andy Lutomirski <luto@amacapital.net> Link: http://lkml.kernel.org/r/0e546a5eeaafdf1840e6ee654a55c1e727c26663.1403129369.git.luto@amacapital.net Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-06-19 06:59:48 +08:00
#define BUILD_VDSOX32
x32: Add x32 VDSO support Add support for the x32 VDSO. The x32 VDSO takes advantage of the similarity between the x86-64 and the x32 ABIs to contain the same content, only the container is different, as the x32 VDSO obviously is an x32 shared object. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-02-20 03:38:06 +08:00
#include "vdso-layout.lds.S"
/*
* This controls what userland symbols we export from the vDSO.
*/
VERSION {
LINUX_2.6 {
global:
__vdso_clock_gettime;
__vdso_gettimeofday;
__vdso_getcpu;
__vdso_time;
local: *;
};
}