| 1 | #include <u.h> |
| 2 | #include <libc.h> |
| 3 | #include <ureg.h> |
| 4 | #include "dat.h" |
| 5 | #include "fns.h" |
| 6 | #include "linux.h" |
| 7 | |
| 8 | #pragma profile off |
| 9 | |
| 10 | void |
| 11 | retuser(void) |
| 12 | { |
| 13 | Uproc *p; |
| 14 | Ureg *u; |
| 15 | |
| 16 | p = current; |
| 17 | u = p->ureg; |
| 18 | p->ureg = nil; |
| 19 | if(p->innote == 0) |
| 20 | jumpureg(u); |
| 21 | p->innote = 0; |
| 22 | noted(NCONT); |
| 23 | } |
| 24 | |
| 25 | static void |
| 26 | handletrap(void *v, char *m) |
| 27 | { |
| 28 | Uproc *p; |
| 29 | Usiginfo si; |
| 30 | |
| 31 | p = current; |
| 32 | p->innote = 1; |
| 33 | p->ureg = v; |
| 34 | |
| 35 | if(strncmp(m, "interrupt", 9) == 0){ |
| 36 | if(p->notified){ |
| 37 | p->notified = 0; |
| 38 | } else { |
| 39 | memset(&si, 0, sizeof(si)); |
| 40 | si.signo = SIGINT; |
| 41 | sendsignal(p, &si, 0); |
| 42 | } |
| 43 | goto handled; |
| 44 | } |
| 45 | |
| 46 | if(p->traceproc) |
| 47 | goto traced; |
| 48 | |
| 49 | if(strncmp(m, "sys: trap: general protection violation", 39) == 0) |
| 50 | if(linuxcall() == 0) |
| 51 | goto handled; |
| 52 | |
| 53 | if(strncmp(m, "sys: write on closed pipe", 25) == 0) |
| 54 | goto handled; |
| 55 | |
| 56 | if(strncmp(m, "sys: trap: invalid opcode", 25) == 0){ |
| 57 | memset(&si, 0, sizeof(si)); |
| 58 | si.signo = SIGILL; |
| 59 | si.code = ILL_ILLOPC; |
| 60 | si.fault.addr = (void*)p->ureg->pc; |
| 61 | sendsignal(p, &si, 0); |
| 62 | goto handled; |
| 63 | } |
| 64 | |
| 65 | if(strncmp(m, "sys: trap: divide error", 23) == 0){ |
| 66 | memset(&si, 0, sizeof(si)); |
| 67 | si.signo = SIGFPE; |
| 68 | si.code = FPE_INTDIV; |
| 69 | si.fault.addr = (void*)p->ureg->pc; |
| 70 | sendsignal(p, &si, 0); |
| 71 | goto handled; |
| 72 | } |
| 73 | |
| 74 | if(strncmp(m, "sys: trap: overflow", 19) == 0){ |
| 75 | memset(&si, 0, sizeof(si)); |
| 76 | si.signo = SIGFPE; |
| 77 | si.code = FPE_INTOVF; |
| 78 | si.fault.addr = (void*)p->ureg->pc; |
| 79 | sendsignal(p, &si, 0); |
| 80 | goto handled; |
| 81 | } |
| 82 | |
| 83 | trace("handletrap: %s", m); |
| 84 | if(debug) |
| 85 | noted(NDFLT); |
| 86 | |
| 87 | exitproc(p, SIGKILL, 1); |
| 88 | |
| 89 | handled: |
| 90 | if(p->traceproc) |
| 91 | traced: p->traceproc(p->tracearg); |
| 92 | |
| 93 | handlesignals(); |
| 94 | retuser(); |
| 95 | } |
| 96 | |
| 97 | #pragma profile on |
| 98 | |
| 99 | |
| 100 | void inittrap(void) |
| 101 | { |
| 102 | ulong f; |
| 103 | |
| 104 | /* disable FPU faults */ |
| 105 | f = getfcr(); |
| 106 | f &= ~(FPINEX|FPOVFL|FPUNFL|FPZDIV|FPINVAL); |
| 107 | setfcr(f); |
| 108 | |
| 109 | notify(handletrap); |
| 110 | } |