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arm64: ptrace: map SPSR_ELx<->PSR for compat tasks

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commit 76fc52bd07d3e9cb708f1a50b60c825c96acd606 upstream.

The SPSR_ELx format for exceptions taken from AArch32 is slightly
different to the AArch32 PSR format.

Map between the two in the compat ptrace code.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Fixes: 7206dc93a58fb764 ("arm64: Expose Arm v8.4 features")
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Suzuki Poulose <suzuki.poulose@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mark Rutland 2018-07-05 15:16:51 +01:00 committed by Greg Kroah-Hartman
parent 45aa094b49
commit e5c83bb6a4
1 changed files with 2 additions and 0 deletions
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arch/arm64/kernel/ptrace.c
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@ -833,6 +833,7 @@ static int compat_gpr_get(struct task_struct *target,
break;
case 16:
reg = task_pt_regs(target)->pstate;
reg = pstate_to_compat_psr(reg);
break;
case 17:
reg = task_pt_regs(target)->orig_x0;
@ -900,6 +901,7 @@ static int compat_gpr_set(struct task_struct *target,
newregs.pc = reg;
break;
case 16:
reg = compat_psr_to_pstate(reg);
newregs.pstate = reg;
break;
case 17: