Author: andrew
Date: Tue Dec 1 09:52:41 2015
New Revision: 291577
URL: https://svnweb.freebsd.org/changeset/base/291577
Log:
Print useful information when we hit a data abort we can't handle. This
prints the trap frame, along with the exception syndrome and fault address
registers. Even though esr is 64-bits here it is only 32-bits in hardware
so only print the valid 32-bits.
While here also print esr and far when appropriate after printing the trap
frame.
Sponsored by: ABT Systems Ltd
Modified:
head/sys/arm64/arm64/trap.c
Modified: head/sys/arm64/arm64/trap.c
==============================================================================
--- head/sys/arm64/arm64/trap.c Tue Dec 1 09:06:09 2015 (r291576)
+++ head/sys/arm64/arm64/trap.c Tue Dec 1 09:52:41 2015 (r291577)
@@ -186,6 +186,8 @@ data_abort(struct trapframe *frame, uint
if (td->td_critnest != 0 || WITNESS_CHECK(WARN_SLEEPOK |
WARN_GIANTOK, NULL, "Kernel page fault") != 0) {
print_registers(frame);
+ printf(" far: %16lx\n", far);
+ printf(" esr: %.8lx\n", esr);
panic("data abort in critical section or under mutex");
}
@@ -220,6 +222,12 @@ data_abort(struct trapframe *frame, uint
frame->tf_elr = pcb->pcb_onfault;
return;
}
+
+ printf("Fatal data abort:\n");
+ print_registers(frame);
+ printf(" far: %16lx\n", far);
+ printf(" esr: %.8lx\n", esr);
+
#ifdef KDB
if (debugger_on_panic || kdb_active)
if (kdb_trap(ESR_ELx_EXCEPTION(esr), 0, frame))
@@ -271,6 +279,7 @@ do_el1h_sync(struct trapframe *frame)
case EXCP_FP_SIMD:
case EXCP_TRAP_FP:
print_registers(frame);
+ printf(" esr: %.8lx\n", esr);
panic("VFP exception in the kernel");
case EXCP_DATA_ABORT:
far = READ_SPECIALREG(far_el1);
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