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Differential D21566 Diff 62659 head/sys/arm/arm/trap-v6.c

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head/sys/arm/arm/trap-v6.c

Show First 20 Lines • Show All 281 Lines • ▼ Show 20 Linesabort_handler(struct trapframe *tf, int prefetch)
uint32_t fsr; uint32_t fsr;
struct ksig ksig; struct ksig ksig;
struct proc *p; struct proc *p;
struct pcb *pcb; struct pcb *pcb;
struct vm_map *map; struct vm_map *map;
struct vmspace *vm; struct vmspace *vm;
vm_prot_t ftype; vm_prot_t ftype;
bool usermode; bool usermode;
int bp_harden; int bp_harden, ucode;
#ifdef INVARIANTS #ifdef INVARIANTS
void *onfault; void *onfault;
#endif #endif
VM_CNT_INC(v_trap); VM_CNT_INC(v_trap);
td = curthread; td = curthread;
fsr = (prefetch) ? cp15_ifsr_get(): cp15_dfsr_get(); fsr = (prefetch) ? cp15_ifsr_get(): cp15_dfsr_get();
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#endif #endif
#ifdef INVARIANTS #ifdef INVARIANTS
onfault = pcb->pcb_onfault; onfault = pcb->pcb_onfault;
pcb->pcb_onfault = NULL; pcb->pcb_onfault = NULL;
#endif #endif
/* Fault in the page. */ /* Fault in the page. */
rv = vm_fault(map, va, ftype, VM_FAULT_NORMAL); rv = vm_fault_trap(map, va, ftype, VM_FAULT_NORMAL, &ksig.sig,
&ucode);
ksig.code = ucode;
#ifdef INVARIANTS #ifdef INVARIANTS
pcb->pcb_onfault = onfault; pcb->pcb_onfault = onfault;
#endif #endif
if (__predict_true(rv == KERN_SUCCESS)) if (__predict_true(rv == KERN_SUCCESS))
goto out; goto out;
nogo: nogo:
if (!usermode) { if (!usermode) {
if (td->td_intr_nesting_level == 0 && if (td->td_intr_nesting_level == 0 &&
pcb->pcb_onfault != NULL) { pcb->pcb_onfault != NULL) {
tf->tf_r0 = rv; tf->tf_r0 = rv;
tf->tf_pc = (int)pcb->pcb_onfault; tf->tf_pc = (int)pcb->pcb_onfault;
return; return;
} }
CTR2(KTR_TRAP, "%s: vm_fault() failed with %d", __func__, rv); CTR2(KTR_TRAP, "%s: vm_fault() failed with %d", __func__, rv);
abort_fatal(tf, idx, fsr, far, prefetch, td, &ksig); abort_fatal(tf, idx, fsr, far, prefetch, td, &ksig);
return; return;
} }
ksig.sig = SIGSEGV;
ksig.code = (rv == KERN_PROTECTION_FAILURE) ? SEGV_ACCERR : SEGV_MAPERR;
ksig.addr = far; ksig.addr = far;
do_trapsignal: do_trapsignal:
call_trapsignal(td, ksig.sig, ksig.code, ksig.addr); call_trapsignal(td, ksig.sig, ksig.code, ksig.addr);
out: out:
if (usermode) if (usermode)
userret(td, tf); userret(td, tf);
} }
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