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Print useful information when we hit a data abort we can't handle. This

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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
This commit is contained in:
Andrew Turner 2015-12-01 09:52:41 +00:00
parent 99a1570a25
commit 1e888d7870
1 changed files with 9 additions and 0 deletions
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9
sys/arm64/arm64/trap.c
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@ -186,6 +186,8 @@ data_abort(struct trapframe *frame, uint64_t esr, uint64_t far, int lower)
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, uint64_t esr, uint64_t far, int lower)
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);