diff options
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/kernel/ptrace.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index 5c338ce5a7fa..5df75ab6a3c8 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -1659,15 +1659,19 @@ asmlinkage void syscall_trace_exit(struct pt_regs *regs) } /* - * Bits which are always architecturally RES0 per ARM DDI 0487A.h + * SPSR_ELx bits which are always architecturally RES0 per ARM DDI 0487C.a + * We also take into account DIT (bit 24), which is not yet documented, and + * treat PAN and UAO as RES0 bits, as they are meaningless at EL0, and may be + * allocated an EL0 meaning in future. * Userspace cannot use these until they have an architectural meaning. + * Note that this follows the SPSR_ELx format, not the AArch32 PSR format. * We also reserve IL for the kernel; SS is handled dynamically. */ #define SPSR_EL1_AARCH64_RES0_BITS \ - (GENMASK_ULL(63,32) | GENMASK_ULL(27, 22) | GENMASK_ULL(20, 10) | \ - GENMASK_ULL(5, 5)) + (GENMASK_ULL(63,32) | GENMASK_ULL(27, 25) | GENMASK_ULL(23, 22) | \ + GENMASK_ULL(20, 10) | GENMASK_ULL(5, 5)) #define SPSR_EL1_AARCH32_RES0_BITS \ - (GENMASK_ULL(63,32) | GENMASK_ULL(24, 22) | GENMASK_ULL(20,20)) + (GENMASK_ULL(63,32) | GENMASK_ULL(23, 22) | GENMASK_ULL(20,20)) static int valid_compat_regs(struct user_pt_regs *regs) { |