Commit ba55d3db authored Feb 25, 2011 by Will Deacon Committed by Russell King Feb 26, 2011

ARM: 6767/1: ptrace: fix register indexing in GETHBPREGS request



The GETHBPREGS ptrace request incorrectly maps its index argument onto
the thread's saved debug state when the index != 0. This has not yet
been seen from userspace because GDB (the only user of this request)
only reads from register 0.

This patch fixes the indexing.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent 8f311270

arch/arm/kernel/ptrace.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -996,10 +996,10 @@ static int ptrace_gethbpregs(struct task_struct *tsk, long num,
		while (!(arch_ctrl.len & 0x1))
		arch_ctrl.len >>= 1;

		if (idx & 0x1)
		reg = encode_ctrl_reg(arch_ctrl);
		else
		if (num & 0x1)
		reg = bp->attr.bp_addr;
		else
		reg = encode_ctrl_reg(arch_ctrl);
		}

		put: