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Differential D15093 Diff 41646 head/sys/i386/i386/trap.c

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head/sys/i386/i386/trap.c

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static void static void
trap_fatal(frame, eva) trap_fatal(frame, eva)
struct trapframe *frame; struct trapframe *frame;
vm_offset_t eva; vm_offset_t eva;
{ {
int code, ss, esp; int code, ss, esp;
u_int type; u_int type;
struct soft_segment_descriptor softseg; struct soft_segment_descriptor softseg;
#ifdef KDB
bool handled;
#endif
code = frame->tf_err; code = frame->tf_err;
type = frame->tf_trapno; type = frame->tf_trapno;
sdtossd(&gdt[IDXSEL(frame->tf_cs & 0xffff)].sd, &softseg); sdtossd(&gdt[IDXSEL(frame->tf_cs & 0xffff)].sd, &softseg);
printf("\n\nFatal trap %d: %s while in %s mode\n", type, trap_msg(type), printf("\n\nFatal trap %d: %s while in %s mode\n", type, trap_msg(type),
frame->tf_eflags & PSL_VM ? "vm86" : frame->tf_eflags & PSL_VM ? "vm86" :
ISPL(frame->tf_cs) == SEL_UPL ? "user" : "kernel"); ISPL(frame->tf_cs) == SEL_UPL ? "user" : "kernel");
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if (frame->tf_eflags & PSL_VM) if (frame->tf_eflags & PSL_VM)
printf("vm86, "); printf("vm86, ");
printf("IOPL = %d\n", (frame->tf_eflags & PSL_IOPL) >> 12); printf("IOPL = %d\n", (frame->tf_eflags & PSL_IOPL) >> 12);
printf("current process = %d (%s)\n", printf("current process = %d (%s)\n",
curproc->p_pid, curthread->td_name); curproc->p_pid, curthread->td_name);
#ifdef KDB #ifdef KDB
if (debugger_on_panic) { if (debugger_on_panic) {
kdb_why = KDB_WHY_TRAP;
frame->tf_err = eva; /* smuggle fault address to ddb */ frame->tf_err = eva; /* smuggle fault address to ddb */
if (kdb_trap(type, 0, frame)) { handled = kdb_trap(type, 0, frame);
frame->tf_err = code; /* restore error code */ frame->tf_err = code; /* restore error code */
kdb_why = KDB_WHY_UNSET;
if (handled)
return; return;
}
frame->tf_err = code; /* restore error code */
} }
#endif #endif
printf("trap number = %d\n", type); printf("trap number = %d\n", type);
if (trap_msg(type) != NULL) if (trap_msg(type) != NULL)
panic("%s", trap_msg(type)); panic("%s", trap_msg(type));
else else
panic("unknown/reserved trap"); panic("unknown/reserved trap");
} }
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