|Home > Register Descriptions > AArch32 system registers > DFSR, Data Fault Status Register|
The DFSR holds status information about the last data fault.
DFSR is a 32-bit register, and is part of the Exception and fault handling registers functional group.
There are two formats for this register. The current translation table format determines which format of the register is used.
DFSR (NS) is architecturally mapped to AArch64 register ESR_EL1. See B2.51 ESR_EL1, Exception Syndrome Register, EL1.
DFSR (S) is architecturally mapped to AArch64 register ESR_EL3. See B2.53 ESR_EL3, Exception Syndrome Register, EL3.
If EL3 is using AArch32, there are separate Secure and Non-secure instances of this register.
Bit fields and details not provided in this description are architecturally defined. See the Arm® Architecture Reference Manual Armv8, for Armv8-A architecture profile.