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Differential D21566 Diff 62659 head/sys/arm64/arm64/trap.c

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head/sys/arm64/arm64/trap.c

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static void static void
data_abort(struct thread *td, struct trapframe *frame, uint64_t esr, data_abort(struct thread *td, struct trapframe *frame, uint64_t esr,
uint64_t far, int lower, int exec) uint64_t far, int lower, int exec)
{ {
struct vm_map *map; struct vm_map *map;
struct proc *p; struct proc *p;
struct pcb *pcb; struct pcb *pcb;
vm_prot_t ftype; vm_prot_t ftype;
vm_offset_t va;
int error, sig, ucode; int error, sig, ucode;
#ifdef KDB #ifdef KDB
bool handled; bool handled;
#endif #endif
/* /*
* According to the ARMv8-A rev. A.g, B2.10.5 "Load-Exclusive * According to the ARMv8-A rev. A.g, B2.10.5 "Load-Exclusive
* and Store-Exclusive instruction usage restrictions", state * and Store-Exclusive instruction usage restrictions", state
Show All 39 Lines#endif
if (td->td_critnest != 0 || WITNESS_CHECK(WARN_SLEEPOK | if (td->td_critnest != 0 || WITNESS_CHECK(WARN_SLEEPOK |
WARN_GIANTOK, NULL, "Kernel page fault") != 0) { WARN_GIANTOK, NULL, "Kernel page fault") != 0) {
print_registers(frame); print_registers(frame);
printf(" far: %16lx\n", far); printf(" far: %16lx\n", far);
printf(" esr: %.8lx\n", esr); printf(" esr: %.8lx\n", esr);
panic("data abort in critical section or under mutex"); panic("data abort in critical section or under mutex");
} }
va = trunc_page(far);
if (exec) if (exec)
ftype = VM_PROT_EXECUTE; ftype = VM_PROT_EXECUTE;
else else
ftype = (esr & ISS_DATA_WnR) == 0 ? VM_PROT_READ : ftype = (esr & ISS_DATA_WnR) == 0 ? VM_PROT_READ :
VM_PROT_READ | VM_PROT_WRITE; VM_PROT_READ | VM_PROT_WRITE;
/* Fault in the page. */ /* Fault in the page. */
error = vm_fault(map, va, ftype, VM_FAULT_NORMAL); error = vm_fault_trap(map, far, ftype, VM_FAULT_NORMAL, &sig, &ucode);
if (error != KERN_SUCCESS) { if (error != KERN_SUCCESS) {
if (lower) { if (lower) {
sig = SIGSEGV;
if (error == KERN_PROTECTION_FAILURE)
ucode = SEGV_ACCERR;
else
ucode = SEGV_MAPERR;
call_trapsignal(td, sig, ucode, (void *)far); call_trapsignal(td, sig, ucode, (void *)far);
} else { } else {
if (td->td_intr_nesting_level == 0 && if (td->td_intr_nesting_level == 0 &&
pcb->pcb_onfault != 0) { pcb->pcb_onfault != 0) {
frame->tf_x[0] = error; frame->tf_x[0] = error;
frame->tf_elr = pcb->pcb_onfault; frame->tf_elr = pcb->pcb_onfault;
return; return;
} }
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