bool SignalInterface::is_uplevel_trap(int code) { return code == ILL_TRAP_FAULT(ST_UpLevel); }
static void
ucbsigvechandler(int sig, siginfo_t *sip, ucontext_t *ucp)
{
struct sigcontext sc;
int code;
char *addr;
#ifdef NEVER
int gwinswitch = 0;
#endif
sc.sc_onstack = ((ucp->uc_stack.ss_flags & SS_ONSTACK) != 0);
sc.sc_mask = set2mask(&ucp->uc_sigmask);
#if defined(__sparc)
if (sig == SIGFPE && sip != NULL && SI_FROMKERNEL(sip) &&
(sip->si_code == FPE_INTDIV || sip->si_code == FPE_INTOVF)) {
/*
* Hack to emulate the 4.x kernel behavior of incrementing
* the PC on integer divide by zero and integer overflow
* on sparc machines. (5.x does not increment the PC.)
*/
ucp->uc_mcontext.gregs[REG_PC] =
ucp->uc_mcontext.gregs[REG_nPC];
ucp->uc_mcontext.gregs[REG_nPC] += 4;
}
sc.sc_sp = ucp->uc_mcontext.gregs[REG_SP];
sc.sc_pc = ucp->uc_mcontext.gregs[REG_PC];
sc.sc_npc = ucp->uc_mcontext.gregs[REG_nPC];
/* XX64 There is no REG_PSR for sparcv9, we map in REG_CCR for now */
#if defined(__sparcv9)
sc.sc_psr = ucp->uc_mcontext.gregs[REG_CCR];
#else
sc.sc_psr = ucp->uc_mcontext.gregs[REG_PSR];
#endif
sc.sc_g1 = ucp->uc_mcontext.gregs[REG_G1];
sc.sc_o0 = ucp->uc_mcontext.gregs[REG_O0];
/*
* XXX - What a kludge!
* Store a pointer to the original ucontext_t in the sigcontext
* so that it's available to the sigcleanup call that needs to
* return from the signal handler. Otherwise, vital information
* (e.g., the "out" registers) that's only saved in the
* ucontext_t isn't available to sigcleanup.
*/
sc.sc_wbcnt = (int)(sizeof (*ucp));
sc.sc_spbuf[0] = (char *)(uintptr_t)sig;
sc.sc_spbuf[1] = (char *)ucp;
#ifdef NEVER
/*
* XXX - Sorry, we can never pass the saved register windows
* on in the sigcontext because we use that space to save the
* ucontext_t.
*/
if (ucp->uc_mcontext.gwins != (gwindows_t *)0) {
int i, j;
gwinswitch = 1;
sc.sc_wbcnt = ucp->uc_mcontext.gwins->wbcnt;
/* XXX - should use bcopy to move this in bulk */
for (i = 0; i < ucp->uc_mcontext.gwins; i++) {
sc.sc_spbuf[i] = ucp->uc_mcontext.gwins->spbuf[i];
for (j = 0; j < 8; j++)
sc.sc_wbuf[i][j] =
ucp->uc_mcontext.gwins->wbuf[i].rw_local[j];
for (j = 0; j < 8; j++)
sc.sc_wbuf[i][j+8] =
ucp->uc_mcontext.gwins->wbuf[i].rw_in[j];
}
}
#endif
#endif
/*
* Translate signal codes from new to old.
* /usr/include/sys/siginfo.h contains new codes.
* /usr/ucbinclude/sys/signal.h contains old codes.
*/
code = 0;
addr = SIG_NOADDR;
if (sip != NULL && SI_FROMKERNEL(sip)) {
addr = sip->si_addr;
switch (sig) {
case SIGILL:
switch (sip->si_code) {
case ILL_PRVOPC:
code = ILL_PRIVINSTR_FAULT;
break;
case ILL_BADSTK:
code = ILL_STACK;
break;
case ILL_ILLTRP:
code = ILL_TRAP_FAULT(sip->si_trapno);
break;
default:
code = ILL_ILLINSTR_FAULT;
break;
}
break;
case SIGEMT:
code = EMT_TAG;
break;
case SIGFPE:
switch (sip->si_code) {
case FPE_INTDIV:
code = FPE_INTDIV_TRAP;
break;
case FPE_INTOVF:
code = FPE_INTOVF_TRAP;
break;
case FPE_FLTDIV:
code = FPE_FLTDIV_TRAP;
break;
case FPE_FLTOVF:
code = FPE_FLTOVF_TRAP;
break;
case FPE_FLTUND:
code = FPE_FLTUND_TRAP;
break;
case FPE_FLTRES:
code = FPE_FLTINEX_TRAP;
break;
default:
code = FPE_FLTOPERR_TRAP;
break;
}
break;
case SIGBUS:
switch (sip->si_code) {
case BUS_ADRALN:
code = BUS_ALIGN;
break;
case BUS_ADRERR:
code = BUS_HWERR;
break;
default: /* BUS_OBJERR */
code = FC_MAKE_ERR(sip->si_errno);
break;
}
break;
case SIGSEGV:
switch (sip->si_code) {
case SEGV_MAPERR:
code = SEGV_NOMAP;
break;
case SEGV_ACCERR:
code = SEGV_PROT;
break;
default:
code = FC_MAKE_ERR(sip->si_errno);
break;
}
break;
default:
addr = SIG_NOADDR;
break;
}
}
(*_siguhandler[sig])(sig, code, &sc, addr);
if (sc.sc_onstack)
ucp->uc_stack.ss_flags |= SS_ONSTACK;
else
ucp->uc_stack.ss_flags &= ~SS_ONSTACK;
mask2set(sc.sc_mask, &ucp->uc_sigmask);
#if defined(__sparc)
ucp->uc_mcontext.gregs[REG_SP] = sc.sc_sp;
ucp->uc_mcontext.gregs[REG_PC] = sc.sc_pc;
ucp->uc_mcontext.gregs[REG_nPC] = sc.sc_npc;
#if defined(__sparcv9)
ucp->uc_mcontext.gregs[REG_CCR] = sc.sc_psr;
#else
ucp->uc_mcontext.gregs[REG_PSR] = sc.sc_psr;
#endif
ucp->uc_mcontext.gregs[REG_G1] = sc.sc_g1;
ucp->uc_mcontext.gregs[REG_O0] = sc.sc_o0;
#ifdef NEVER
if (gwinswitch == 1) {
int i, j;
ucp->uc_mcontext.gwins->wbcnt = sc.sc_wbcnt;
/* XXX - should use bcopy to move this in bulk */
for (i = 0; i < sc.sc_wbcnt; i++) {
ucp->uc_mcontext.gwins->spbuf[i] = sc.sc_spbuf[i];
for (j = 0; j < 8; j++)
ucp->uc_mcontext.gwins->wbuf[i].rw_local[j] =
sc.sc_wbuf[i][j];
for (j = 0; j < 8; j++)
ucp->uc_mcontext.gwins->wbuf[i].rw_in[j] =
sc.sc_wbuf[i][j+8];
}
}
#endif
if (sig == SIGFPE) {
if (ucp->uc_mcontext.fpregs.fpu_qcnt > 0) {
ucp->uc_mcontext.fpregs.fpu_qcnt--;
ucp->uc_mcontext.fpregs.fpu_q++;
}
}
#endif
(void) setcontext(ucp);
}
