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Mathieu Desnoyers
ce01a1575f
On x86-64, the parametrized selftest code for rseq crashes with a segmentation fault when compiled with -fpie. This happens when the param_test binary is loaded at an address beyond 32-bit on x86-64. The issue is caused by use of a 32-bit register to hold the address of the loop counter variable. Fix this by using a 64-bit register to calculate the address of the loop counter variables as an offset from rip. Signed-off-by: Mathieu Desnoyers <[email protected]> Acked-by: "Paul E . McKenney" <[email protected]> Cc: <[email protected]> # v4.18 Cc: Shuah Khan <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Joel Fernandes <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dave Watson <[email protected]> Cc: Will Deacon <[email protected]> Cc: Andi Kleen <[email protected]> Cc: [email protected] Cc: "H . Peter Anvin" <[email protected]> Cc: Chris Lameter <[email protected]> Cc: Russell King <[email protected]> Cc: Michael Kerrisk <[email protected]> Cc: "Paul E . McKenney" <[email protected]> Cc: Paul Turner <[email protected]> Cc: Boqun Feng <[email protected]> Cc: Josh Triplett <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Ben Maurer <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Linus Torvalds <[email protected]> Signed-off-by: Shuah Khan (Samsung OSG) <[email protected]>