kernel_optimize_test/arch/sparc/vdso/vdso.lds.S
David S. Miller caf539cd10 sparc: Fix VDSO build with older binutils.
Older versions of bintutils do not allow symbol math across different
segments on sparc:

====================
Assembler messages:
99: Error: operation combines symbols in different segments
====================

This is controlled by whether or not DIFF_EXPR_OK is defined in
gas/config/tc-*.h and for sparc this was not the case until mid-2017.

So we have to patch between %stick and %tick another way.

Do what powerpc does and emit two versions of the relevant functions,
one using %tick and one using %stick, and patch the symbols in the
dynamic symbol table.

Fixes: 2f6c9bf31a ("sparc: Improve VDSO instruction patching.")
Reported-by: Meelis Roos <mroos@linux.ee>
Tested-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-25 10:36:19 -07:00

28 lines
498 B
ArmAsm

/*
* Linker script for 64-bit vDSO.
* We #include the file to define the layout details.
*
* This file defines the version script giving the user-exported symbols in
* the DSO.
*/
#define BUILD_VDSO64
#include "vdso-layout.lds.S"
/*
* This controls what userland symbols we export from the vDSO.
*/
VERSION {
LINUX_2.6 {
global:
clock_gettime;
__vdso_clock_gettime;
__vdso_clock_gettime_stick;
gettimeofday;
__vdso_gettimeofday;
__vdso_gettimeofday_stick;
local: *;
};
}