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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>
This commit is contained in:
Will Deacon 2011-02-25 20:19:32 +01:00 committed by Russell King
parent 8f3112707f
commit ba55d3db9b
1 changed files with 3 additions and 3 deletions
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6
arch/arm/kernel/ptrace.c
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@ -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: