diff options
Diffstat (limited to 'sys/kern/subr_trap.c')
| -rw-r--r-- | sys/kern/subr_trap.c | 54 |
1 files changed, 48 insertions, 6 deletions
diff --git a/sys/kern/subr_trap.c b/sys/kern/subr_trap.c index c224396..92247dd 100644 --- a/sys/kern/subr_trap.c +++ b/sys/kern/subr_trap.c @@ -34,7 +34,7 @@ * SUCH DAMAGE. * * from: @(#)trap.c 7.4 (Berkeley) 5/13/91 - * $Id: trap.c,v 1.5 1993/11/01 11:51:29 chmr Exp $ + * $Id: trap.c,v 1.6 1993/11/04 15:05:41 davidg Exp $ */ /* @@ -85,6 +85,38 @@ int dostacklimits; unsigned rcr2(); extern short cpl; +#define MAX_TRAP_MSG 27 +char *trap_msg[] = { + "reserved addressing fault", /* 0 T_RESADFLT */ + "privileged instruction fault", /* 1 T_PRIVINFLT */ + "reserved operand fault", /* 2 T_RESOPFLT */ + "breakpoint instruction fault", /* 3 T_BPTFLT */ + "", /* 4 unused */ + "system call trap", /* 5 T_SYSCALL */ + "arithmetic trap", /* 6 T_ARITHTRAP */ + "system forced exception", /* 7 T_ASTFLT */ + "segmentation (limit) fault", /* 8 T_SEGFLT */ + "protection fault", /* 9 T_PROTFLT */ + "trace trap", /* 10 T_TRCTRAP */ + "", /* 11 unused */ + "page fault", /* 12 T_PAGEFLT */ + "page table fault", /* 13 T_TABLEFLT */ + "alignment fault", /* 14 T_ALIGNFLT */ + "kernel stack pointer not valid", /* 15 T_KSPNOTVAL */ + "bus error", /* 16 T_BUSERR */ + "kernel debugger fault", /* 17 T_KDBTRAP */ + "integer divide fault", /* 18 T_DIVIDE */ + "non-maskable interrupt trap", /* 19 T_NMI */ + "overflow trap", /* 20 T_OFLOW */ + "FPU bounds check fault", /* 21 T_BOUND */ + "FPU device not available", /* 22 T_DNA */ + "double fault", /* 23 T_DOUBLEFLT */ + "FPU operand fetch fault", /* 24 T_FPOPFLT */ + "invalid TSS fault", /* 25 T_TSSFLT */ + "segment not present fault", /* 26 T_SEGNPFLT */ + "stack fault", /* 27 T_STKFLT */ +}; + /* * trap(frame): @@ -165,13 +197,23 @@ copyfault: return; #endif - printf("trap type %d code = %x eip = %x cs = %x eflags = %x ", + if ((type & ~T_USER) <= MAX_TRAP_MSG) + printf("\n\nFatal trap %d: %s while in %s mode\n", + type & ~T_USER, trap_msg[type & ~T_USER], + (type & T_USER) ? "user" : "kernel"); + + printf("trap type = %d, code = %x\n eip = %x, cs = %x, eflags = %x, ", frame.tf_trapno, frame.tf_err, frame.tf_eip, frame.tf_cs, frame.tf_eflags); - eva = rcr2(); - printf("cr2 %x cpl %x\n", eva, cpl); - /* type &= ~T_USER; */ /* XXX what the hell is this */ - panic("trap"); + eva = rcr2(); + printf("cr2 = %x, current priority = %x\n", eva, cpl); + + type &= ~T_USER; + if (type <= MAX_TRAP_MSG) + panic(trap_msg[type]); + else + panic("unknown/reserved trap"); + /*NOTREACHED*/ case T_SEGNPFLT|T_USER: |
