1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate /* Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */ 28*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */ 29*0Sstevel@tonic-gate /* All Rights Reserved */ 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate #include <sys/types.h> 34*0Sstevel@tonic-gate #include <sys/param.h> 35*0Sstevel@tonic-gate #include <sys/sysmacros.h> 36*0Sstevel@tonic-gate #include <sys/signal.h> 37*0Sstevel@tonic-gate #include <sys/systm.h> 38*0Sstevel@tonic-gate #include <sys/user.h> 39*0Sstevel@tonic-gate #include <sys/mman.h> 40*0Sstevel@tonic-gate #include <sys/class.h> 41*0Sstevel@tonic-gate #include <sys/proc.h> 42*0Sstevel@tonic-gate #include <sys/procfs.h> 43*0Sstevel@tonic-gate #include <sys/buf.h> 44*0Sstevel@tonic-gate #include <sys/kmem.h> 45*0Sstevel@tonic-gate #include <sys/cred.h> 46*0Sstevel@tonic-gate #include <sys/archsystm.h> 47*0Sstevel@tonic-gate #include <sys/vmparam.h> 48*0Sstevel@tonic-gate #include <sys/prsystm.h> 49*0Sstevel@tonic-gate #include <sys/reboot.h> 50*0Sstevel@tonic-gate #include <sys/uadmin.h> 51*0Sstevel@tonic-gate #include <sys/vfs.h> 52*0Sstevel@tonic-gate #include <sys/vnode.h> 53*0Sstevel@tonic-gate #include <sys/file.h> 54*0Sstevel@tonic-gate #include <sys/session.h> 55*0Sstevel@tonic-gate #include <sys/ucontext.h> 56*0Sstevel@tonic-gate #include <sys/dnlc.h> 57*0Sstevel@tonic-gate #include <sys/var.h> 58*0Sstevel@tonic-gate #include <sys/cmn_err.h> 59*0Sstevel@tonic-gate #include <sys/debugreg.h> 60*0Sstevel@tonic-gate #include <sys/thread.h> 61*0Sstevel@tonic-gate #include <sys/vtrace.h> 62*0Sstevel@tonic-gate #include <sys/consdev.h> 63*0Sstevel@tonic-gate #include <sys/psw.h> 64*0Sstevel@tonic-gate #include <sys/regset.h> 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate #include <sys/privregs.h> 67*0Sstevel@tonic-gate 68*0Sstevel@tonic-gate #include <sys/stack.h> 69*0Sstevel@tonic-gate #include <sys/swap.h> 70*0Sstevel@tonic-gate #include <vm/hat.h> 71*0Sstevel@tonic-gate #include <vm/anon.h> 72*0Sstevel@tonic-gate #include <vm/as.h> 73*0Sstevel@tonic-gate #include <vm/page.h> 74*0Sstevel@tonic-gate #include <vm/seg.h> 75*0Sstevel@tonic-gate #include <vm/seg_kmem.h> 76*0Sstevel@tonic-gate #include <vm/seg_map.h> 77*0Sstevel@tonic-gate #include <vm/seg_vn.h> 78*0Sstevel@tonic-gate #include <sys/exec.h> 79*0Sstevel@tonic-gate #include <sys/acct.h> 80*0Sstevel@tonic-gate #include <sys/core.h> 81*0Sstevel@tonic-gate #include <sys/corectl.h> 82*0Sstevel@tonic-gate #include <sys/modctl.h> 83*0Sstevel@tonic-gate #include <sys/tuneable.h> 84*0Sstevel@tonic-gate #include <c2/audit.h> 85*0Sstevel@tonic-gate #include <sys/bootconf.h> 86*0Sstevel@tonic-gate #include <sys/dumphdr.h> 87*0Sstevel@tonic-gate #include <sys/promif.h> 88*0Sstevel@tonic-gate #include <sys/systeminfo.h> 89*0Sstevel@tonic-gate #include <sys/kdi.h> 90*0Sstevel@tonic-gate #include <sys/contract_impl.h> 91*0Sstevel@tonic-gate #include <sys/x86_archext.h> 92*0Sstevel@tonic-gate 93*0Sstevel@tonic-gate /* 94*0Sstevel@tonic-gate * Construct the execution environment for the user's signal 95*0Sstevel@tonic-gate * handler and arrange for control to be given to it on return 96*0Sstevel@tonic-gate * to userland. The library code now calls setcontext() to 97*0Sstevel@tonic-gate * clean up after the signal handler, so sigret() is no longer 98*0Sstevel@tonic-gate * needed. 99*0Sstevel@tonic-gate * 100*0Sstevel@tonic-gate * (The various 'volatile' declarations are need to ensure that values 101*0Sstevel@tonic-gate * are correct on the error return from on_fault().) 102*0Sstevel@tonic-gate */ 103*0Sstevel@tonic-gate 104*0Sstevel@tonic-gate #if defined(__amd64) 105*0Sstevel@tonic-gate 106*0Sstevel@tonic-gate /* 107*0Sstevel@tonic-gate * An amd64 signal frame looks like this on the stack: 108*0Sstevel@tonic-gate * 109*0Sstevel@tonic-gate * old %rsp: 110*0Sstevel@tonic-gate * <128 bytes of untouched stack space> 111*0Sstevel@tonic-gate * <a siginfo_t [optional]> 112*0Sstevel@tonic-gate * <a ucontext_t> 113*0Sstevel@tonic-gate * <siginfo_t *> 114*0Sstevel@tonic-gate * <signal number> 115*0Sstevel@tonic-gate * new %rsp: <return address (deliberately invalid)> 116*0Sstevel@tonic-gate * 117*0Sstevel@tonic-gate * The signal number and siginfo_t pointer are only pushed onto the stack in 118*0Sstevel@tonic-gate * order to allow stack backtraces. The actual signal handling code expects the 119*0Sstevel@tonic-gate * arguments in registers. 120*0Sstevel@tonic-gate */ 121*0Sstevel@tonic-gate 122*0Sstevel@tonic-gate struct sigframe { 123*0Sstevel@tonic-gate caddr_t retaddr; 124*0Sstevel@tonic-gate long signo; 125*0Sstevel@tonic-gate siginfo_t *sip; 126*0Sstevel@tonic-gate }; 127*0Sstevel@tonic-gate 128*0Sstevel@tonic-gate int 129*0Sstevel@tonic-gate sendsig(int sig, k_siginfo_t *sip, void (*hdlr)()) 130*0Sstevel@tonic-gate { 131*0Sstevel@tonic-gate volatile int minstacksz; 132*0Sstevel@tonic-gate int newstack; 133*0Sstevel@tonic-gate label_t ljb; 134*0Sstevel@tonic-gate volatile caddr_t sp; 135*0Sstevel@tonic-gate caddr_t fp; 136*0Sstevel@tonic-gate volatile struct regs *rp; 137*0Sstevel@tonic-gate volatile greg_t upc; 138*0Sstevel@tonic-gate volatile proc_t *p = ttoproc(curthread); 139*0Sstevel@tonic-gate klwp_t *lwp = ttolwp(curthread); 140*0Sstevel@tonic-gate ucontext_t *volatile tuc = NULL; 141*0Sstevel@tonic-gate ucontext_t *uc; 142*0Sstevel@tonic-gate siginfo_t *sip_addr; 143*0Sstevel@tonic-gate volatile int watched; 144*0Sstevel@tonic-gate 145*0Sstevel@tonic-gate /* 146*0Sstevel@tonic-gate * This routine is utterly dependent upon STACK_ALIGN being 147*0Sstevel@tonic-gate * 16 and STACK_ENTRY_ALIGN being 8. Let's just acknowledge 148*0Sstevel@tonic-gate * that and require it. 149*0Sstevel@tonic-gate */ 150*0Sstevel@tonic-gate 151*0Sstevel@tonic-gate #if STACK_ALIGN != 16 || STACK_ENTRY_ALIGN != 8 152*0Sstevel@tonic-gate #error "sendsig() amd64 did not find the expected stack alignments" 153*0Sstevel@tonic-gate #endif 154*0Sstevel@tonic-gate 155*0Sstevel@tonic-gate rp = lwptoregs(lwp); 156*0Sstevel@tonic-gate upc = rp->r_pc; 157*0Sstevel@tonic-gate 158*0Sstevel@tonic-gate /* 159*0Sstevel@tonic-gate * Since we're setting up to run the signal handler we have to 160*0Sstevel@tonic-gate * arrange that the stack at entry to the handler is (only) 161*0Sstevel@tonic-gate * STACK_ENTRY_ALIGN (i.e. 8) byte aligned so that when the handler 162*0Sstevel@tonic-gate * executes its push of %rbp, the stack realigns to STACK_ALIGN 163*0Sstevel@tonic-gate * (i.e. 16) correctly. 164*0Sstevel@tonic-gate * 165*0Sstevel@tonic-gate * The new sp will point to the sigframe and the ucontext_t. The 166*0Sstevel@tonic-gate * above means that sp (and thus sigframe) will be 8-byte aligned, 167*0Sstevel@tonic-gate * but not 16-byte aligned. ucontext_t, however, contains %xmm regs 168*0Sstevel@tonic-gate * which must be 16-byte aligned. Because of this, for correct 169*0Sstevel@tonic-gate * alignment, sigframe must be a multiple of 8-bytes in length, but 170*0Sstevel@tonic-gate * not 16-bytes. This will place ucontext_t at a nice 16-byte boundary. 171*0Sstevel@tonic-gate */ 172*0Sstevel@tonic-gate 173*0Sstevel@tonic-gate /* LINTED: logical expression always true: op "||" */ 174*0Sstevel@tonic-gate ASSERT((sizeof (struct sigframe) % 16) == 8); 175*0Sstevel@tonic-gate 176*0Sstevel@tonic-gate minstacksz = sizeof (struct sigframe) + SA(sizeof (*uc)); 177*0Sstevel@tonic-gate if (sip != NULL) 178*0Sstevel@tonic-gate minstacksz += SA(sizeof (siginfo_t)); 179*0Sstevel@tonic-gate ASSERT((minstacksz & (STACK_ENTRY_ALIGN - 1ul)) == 0); 180*0Sstevel@tonic-gate 181*0Sstevel@tonic-gate /* 182*0Sstevel@tonic-gate * Figure out whether we will be handling this signal on 183*0Sstevel@tonic-gate * an alternate stack specified by the user. Then allocate 184*0Sstevel@tonic-gate * and validate the stack requirements for the signal handler 185*0Sstevel@tonic-gate * context. on_fault will catch any faults. 186*0Sstevel@tonic-gate */ 187*0Sstevel@tonic-gate newstack = sigismember(&u.u_sigonstack, sig) && 188*0Sstevel@tonic-gate !(lwp->lwp_sigaltstack.ss_flags & (SS_ONSTACK|SS_DISABLE)); 189*0Sstevel@tonic-gate 190*0Sstevel@tonic-gate if (newstack) { 191*0Sstevel@tonic-gate fp = (caddr_t)(SA((uintptr_t)lwp->lwp_sigaltstack.ss_sp) + 192*0Sstevel@tonic-gate SA(lwp->lwp_sigaltstack.ss_size) - STACK_ALIGN); 193*0Sstevel@tonic-gate } else { 194*0Sstevel@tonic-gate /* 195*0Sstevel@tonic-gate * Drop below the 128-byte reserved region of the stack frame 196*0Sstevel@tonic-gate * we're interrupting. 197*0Sstevel@tonic-gate */ 198*0Sstevel@tonic-gate fp = (caddr_t)rp->r_sp - STACK_RESERVE; 199*0Sstevel@tonic-gate } 200*0Sstevel@tonic-gate 201*0Sstevel@tonic-gate /* 202*0Sstevel@tonic-gate * Most of the time during normal execution, the stack pointer 203*0Sstevel@tonic-gate * is aligned on a STACK_ALIGN (i.e. 16 byte) boundary. However, 204*0Sstevel@tonic-gate * (for example) just after a call instruction (which pushes 205*0Sstevel@tonic-gate * the return address), the callers stack misaligns until the 206*0Sstevel@tonic-gate * 'push %rbp' happens in the callee prolog. So while we should 207*0Sstevel@tonic-gate * expect the stack pointer to be always at least STACK_ENTRY_ALIGN 208*0Sstevel@tonic-gate * aligned, we should -not- expect it to always be STACK_ALIGN aligned. 209*0Sstevel@tonic-gate * We now adjust to ensure that the new sp is aligned to 210*0Sstevel@tonic-gate * STACK_ENTRY_ALIGN but not to STACK_ALIGN. 211*0Sstevel@tonic-gate */ 212*0Sstevel@tonic-gate sp = fp - minstacksz; 213*0Sstevel@tonic-gate if (((uintptr_t)sp & (STACK_ALIGN - 1ul)) == 0) { 214*0Sstevel@tonic-gate sp -= STACK_ENTRY_ALIGN; 215*0Sstevel@tonic-gate minstacksz = fp - sp; 216*0Sstevel@tonic-gate } 217*0Sstevel@tonic-gate 218*0Sstevel@tonic-gate /* 219*0Sstevel@tonic-gate * Now, make sure the resulting signal frame address is sane 220*0Sstevel@tonic-gate */ 221*0Sstevel@tonic-gate if (((uintptr_t)(sp - STACK_ENTRY_ALIGN) & (STACK_ALIGN - 1ul)) != 0 || 222*0Sstevel@tonic-gate sp >= (caddr_t)USERLIMIT || fp >= (caddr_t)USERLIMIT) { 223*0Sstevel@tonic-gate #ifdef DEBUG 224*0Sstevel@tonic-gate printf("sendsig: bad signal stack cmd=%s, pid=%d, sig=%d\n", 225*0Sstevel@tonic-gate PTOU(p)->u_comm, p->p_pid, sig); 226*0Sstevel@tonic-gate printf("sigsp = 0x%p, action = 0x%p, upc = 0x%lx\n", 227*0Sstevel@tonic-gate (void *)sp, (void *)hdlr, (uintptr_t)upc); 228*0Sstevel@tonic-gate 229*0Sstevel@tonic-gate if (((uintptr_t)(sp - STACK_ENTRY_ALIGN) & 230*0Sstevel@tonic-gate (STACK_ALIGN - 1ul)) != 0) 231*0Sstevel@tonic-gate printf("bad stack alignment\n"); 232*0Sstevel@tonic-gate else 233*0Sstevel@tonic-gate printf("sp above USERLIMIT\n"); 234*0Sstevel@tonic-gate #endif 235*0Sstevel@tonic-gate return (0); 236*0Sstevel@tonic-gate } 237*0Sstevel@tonic-gate 238*0Sstevel@tonic-gate watched = watch_disable_addr((caddr_t)sp, minstacksz, S_WRITE); 239*0Sstevel@tonic-gate 240*0Sstevel@tonic-gate if (on_fault(&ljb)) 241*0Sstevel@tonic-gate goto badstack; 242*0Sstevel@tonic-gate 243*0Sstevel@tonic-gate if (sip != NULL) { 244*0Sstevel@tonic-gate zoneid_t zoneid; 245*0Sstevel@tonic-gate 246*0Sstevel@tonic-gate fp -= SA(sizeof (siginfo_t)); 247*0Sstevel@tonic-gate uzero(fp, sizeof (siginfo_t)); 248*0Sstevel@tonic-gate if (SI_FROMUSER(sip) && 249*0Sstevel@tonic-gate (zoneid = p->p_zone->zone_id) != GLOBAL_ZONEID && 250*0Sstevel@tonic-gate zoneid != sip->si_zoneid) { 251*0Sstevel@tonic-gate k_siginfo_t sani_sip = *sip; 252*0Sstevel@tonic-gate 253*0Sstevel@tonic-gate sani_sip.si_pid = p->p_zone->zone_zsched->p_pid; 254*0Sstevel@tonic-gate sani_sip.si_uid = 0; 255*0Sstevel@tonic-gate sani_sip.si_ctid = -1; 256*0Sstevel@tonic-gate sani_sip.si_zoneid = zoneid; 257*0Sstevel@tonic-gate copyout_noerr(&sani_sip, fp, sizeof (sani_sip)); 258*0Sstevel@tonic-gate } else 259*0Sstevel@tonic-gate copyout_noerr(sip, fp, sizeof (*sip)); 260*0Sstevel@tonic-gate sip_addr = (siginfo_t *)fp; 261*0Sstevel@tonic-gate 262*0Sstevel@tonic-gate if (sig == SIGPROF && 263*0Sstevel@tonic-gate curthread->t_rprof != NULL && 264*0Sstevel@tonic-gate curthread->t_rprof->rp_anystate) { 265*0Sstevel@tonic-gate /* 266*0Sstevel@tonic-gate * We stand on our head to deal with 267*0Sstevel@tonic-gate * the real time profiling signal. 268*0Sstevel@tonic-gate * Fill in the stuff that doesn't fit 269*0Sstevel@tonic-gate * in a normal k_siginfo structure. 270*0Sstevel@tonic-gate */ 271*0Sstevel@tonic-gate int i = sip->si_nsysarg; 272*0Sstevel@tonic-gate 273*0Sstevel@tonic-gate while (--i >= 0) 274*0Sstevel@tonic-gate sulword_noerr( 275*0Sstevel@tonic-gate (ulong_t *)&(sip_addr->si_sysarg[i]), 276*0Sstevel@tonic-gate (ulong_t)lwp->lwp_arg[i]); 277*0Sstevel@tonic-gate copyout_noerr(curthread->t_rprof->rp_state, 278*0Sstevel@tonic-gate sip_addr->si_mstate, 279*0Sstevel@tonic-gate sizeof (curthread->t_rprof->rp_state)); 280*0Sstevel@tonic-gate } 281*0Sstevel@tonic-gate } else 282*0Sstevel@tonic-gate sip_addr = NULL; 283*0Sstevel@tonic-gate 284*0Sstevel@tonic-gate /* 285*0Sstevel@tonic-gate * save the current context on the user stack directly after the 286*0Sstevel@tonic-gate * sigframe. Since sigframe is 8-byte-but-not-16-byte aligned, 287*0Sstevel@tonic-gate * and since sizeof (struct sigframe) is 24, this guarantees 288*0Sstevel@tonic-gate * 16-byte alignment for ucontext_t and its %xmm registers. 289*0Sstevel@tonic-gate */ 290*0Sstevel@tonic-gate uc = (ucontext_t *)(sp + sizeof (struct sigframe)); 291*0Sstevel@tonic-gate tuc = kmem_alloc(sizeof (*tuc), KM_SLEEP); 292*0Sstevel@tonic-gate savecontext(tuc, lwp->lwp_sigoldmask); 293*0Sstevel@tonic-gate copyout_noerr(tuc, uc, sizeof (*tuc)); 294*0Sstevel@tonic-gate kmem_free(tuc, sizeof (*tuc)); 295*0Sstevel@tonic-gate tuc = NULL; 296*0Sstevel@tonic-gate 297*0Sstevel@tonic-gate lwp->lwp_oldcontext = (uintptr_t)uc; 298*0Sstevel@tonic-gate 299*0Sstevel@tonic-gate if (newstack) { 300*0Sstevel@tonic-gate lwp->lwp_sigaltstack.ss_flags |= SS_ONSTACK; 301*0Sstevel@tonic-gate if (lwp->lwp_ustack) 302*0Sstevel@tonic-gate copyout_noerr(&lwp->lwp_sigaltstack, 303*0Sstevel@tonic-gate (stack_t *)lwp->lwp_ustack, sizeof (stack_t)); 304*0Sstevel@tonic-gate } 305*0Sstevel@tonic-gate 306*0Sstevel@tonic-gate /* 307*0Sstevel@tonic-gate * Set up signal handler return and stack linkage 308*0Sstevel@tonic-gate */ 309*0Sstevel@tonic-gate { 310*0Sstevel@tonic-gate struct sigframe frame; 311*0Sstevel@tonic-gate 312*0Sstevel@tonic-gate /* 313*0Sstevel@tonic-gate * ensure we never return "normally" 314*0Sstevel@tonic-gate */ 315*0Sstevel@tonic-gate frame.retaddr = (caddr_t)(uintptr_t)-1L; 316*0Sstevel@tonic-gate frame.signo = sig; 317*0Sstevel@tonic-gate frame.sip = sip_addr; 318*0Sstevel@tonic-gate copyout_noerr(&frame, sp, sizeof (frame)); 319*0Sstevel@tonic-gate } 320*0Sstevel@tonic-gate 321*0Sstevel@tonic-gate no_fault(); 322*0Sstevel@tonic-gate if (watched) 323*0Sstevel@tonic-gate watch_enable_addr((caddr_t)sp, minstacksz, S_WRITE); 324*0Sstevel@tonic-gate 325*0Sstevel@tonic-gate /* 326*0Sstevel@tonic-gate * Set up user registers for execution of signal handler. 327*0Sstevel@tonic-gate */ 328*0Sstevel@tonic-gate rp->r_sp = (greg_t)sp; 329*0Sstevel@tonic-gate rp->r_pc = (greg_t)hdlr; 330*0Sstevel@tonic-gate rp->r_ps = PSL_USER | (rp->r_ps & PS_IOPL); 331*0Sstevel@tonic-gate 332*0Sstevel@tonic-gate rp->r_rdi = sig; 333*0Sstevel@tonic-gate rp->r_rsi = (uintptr_t)sip_addr; 334*0Sstevel@tonic-gate rp->r_rdx = (uintptr_t)uc; 335*0Sstevel@tonic-gate 336*0Sstevel@tonic-gate if ((rp->r_cs & 0xffff) != UCS_SEL || 337*0Sstevel@tonic-gate (rp->r_ss & 0xffff) != UDS_SEL) { 338*0Sstevel@tonic-gate /* 339*0Sstevel@tonic-gate * Try our best to deliver the signal. 340*0Sstevel@tonic-gate */ 341*0Sstevel@tonic-gate rp->r_cs = UCS_SEL; 342*0Sstevel@tonic-gate rp->r_ss = UDS_SEL; 343*0Sstevel@tonic-gate } 344*0Sstevel@tonic-gate 345*0Sstevel@tonic-gate /* 346*0Sstevel@tonic-gate * Don't set lwp_eosys here. sendsig() is called via psig() after 347*0Sstevel@tonic-gate * lwp_eosys is handled, so setting it here would affect the next 348*0Sstevel@tonic-gate * system call. 349*0Sstevel@tonic-gate */ 350*0Sstevel@tonic-gate return (1); 351*0Sstevel@tonic-gate 352*0Sstevel@tonic-gate badstack: 353*0Sstevel@tonic-gate no_fault(); 354*0Sstevel@tonic-gate if (watched) 355*0Sstevel@tonic-gate watch_enable_addr((caddr_t)sp, minstacksz, S_WRITE); 356*0Sstevel@tonic-gate if (tuc) 357*0Sstevel@tonic-gate kmem_free(tuc, sizeof (*tuc)); 358*0Sstevel@tonic-gate #ifdef DEBUG 359*0Sstevel@tonic-gate printf("sendsig: bad signal stack cmd=%s, pid=%d, sig=%d\n", 360*0Sstevel@tonic-gate PTOU(p)->u_comm, p->p_pid, sig); 361*0Sstevel@tonic-gate printf("on fault, sigsp = 0x%p, action = 0x%p, upc = 0x%lx\n", 362*0Sstevel@tonic-gate (void *)sp, (void *)hdlr, (uintptr_t)upc); 363*0Sstevel@tonic-gate #endif 364*0Sstevel@tonic-gate return (0); 365*0Sstevel@tonic-gate } 366*0Sstevel@tonic-gate 367*0Sstevel@tonic-gate #ifdef _SYSCALL32_IMPL 368*0Sstevel@tonic-gate 369*0Sstevel@tonic-gate /* 370*0Sstevel@tonic-gate * An i386 SVR4/ABI signal frame looks like this on the stack: 371*0Sstevel@tonic-gate * 372*0Sstevel@tonic-gate * old %esp: 373*0Sstevel@tonic-gate * <a siginfo32_t [optional]> 374*0Sstevel@tonic-gate * <a ucontext32_t> 375*0Sstevel@tonic-gate * <pointer to that ucontext32_t> 376*0Sstevel@tonic-gate * <pointer to that siginfo32_t> 377*0Sstevel@tonic-gate * <signo> 378*0Sstevel@tonic-gate * new %esp: <return address (deliberately invalid)> 379*0Sstevel@tonic-gate */ 380*0Sstevel@tonic-gate struct sigframe32 { 381*0Sstevel@tonic-gate caddr32_t retaddr; 382*0Sstevel@tonic-gate uint32_t signo; 383*0Sstevel@tonic-gate caddr32_t sip; 384*0Sstevel@tonic-gate caddr32_t ucp; 385*0Sstevel@tonic-gate }; 386*0Sstevel@tonic-gate 387*0Sstevel@tonic-gate int 388*0Sstevel@tonic-gate sendsig32(int sig, k_siginfo_t *sip, void (*hdlr)()) 389*0Sstevel@tonic-gate { 390*0Sstevel@tonic-gate volatile int minstacksz; 391*0Sstevel@tonic-gate int newstack; 392*0Sstevel@tonic-gate label_t ljb; 393*0Sstevel@tonic-gate volatile caddr_t sp; 394*0Sstevel@tonic-gate caddr_t fp; 395*0Sstevel@tonic-gate volatile struct regs *rp; 396*0Sstevel@tonic-gate volatile greg_t upc; 397*0Sstevel@tonic-gate volatile proc_t *p = ttoproc(curthread); 398*0Sstevel@tonic-gate klwp_t *lwp = ttolwp(curthread); 399*0Sstevel@tonic-gate ucontext32_t *volatile tuc = NULL; 400*0Sstevel@tonic-gate ucontext32_t *uc; 401*0Sstevel@tonic-gate siginfo32_t *sip_addr; 402*0Sstevel@tonic-gate volatile int watched; 403*0Sstevel@tonic-gate 404*0Sstevel@tonic-gate rp = lwptoregs(lwp); 405*0Sstevel@tonic-gate upc = rp->r_pc; 406*0Sstevel@tonic-gate 407*0Sstevel@tonic-gate minstacksz = SA32(sizeof (struct sigframe32)) + SA32(sizeof (*uc)); 408*0Sstevel@tonic-gate if (sip != NULL) 409*0Sstevel@tonic-gate minstacksz += SA32(sizeof (siginfo32_t)); 410*0Sstevel@tonic-gate ASSERT((minstacksz & (STACK_ALIGN32 - 1)) == 0); 411*0Sstevel@tonic-gate 412*0Sstevel@tonic-gate /* 413*0Sstevel@tonic-gate * Figure out whether we will be handling this signal on 414*0Sstevel@tonic-gate * an alternate stack specified by the user. Then allocate 415*0Sstevel@tonic-gate * and validate the stack requirements for the signal handler 416*0Sstevel@tonic-gate * context. on_fault will catch any faults. 417*0Sstevel@tonic-gate */ 418*0Sstevel@tonic-gate newstack = sigismember(&u.u_sigonstack, sig) && 419*0Sstevel@tonic-gate !(lwp->lwp_sigaltstack.ss_flags & (SS_ONSTACK|SS_DISABLE)); 420*0Sstevel@tonic-gate 421*0Sstevel@tonic-gate if (newstack) { 422*0Sstevel@tonic-gate fp = (caddr_t)(SA32((uintptr_t)lwp->lwp_sigaltstack.ss_sp) + 423*0Sstevel@tonic-gate SA32(lwp->lwp_sigaltstack.ss_size) - STACK_ALIGN32); 424*0Sstevel@tonic-gate } else if ((rp->r_ss & 0xffff) != UDS_SEL) { 425*0Sstevel@tonic-gate user_desc_t *ldt; 426*0Sstevel@tonic-gate /* 427*0Sstevel@tonic-gate * If the stack segment selector is -not- pointing at 428*0Sstevel@tonic-gate * the UDS_SEL descriptor and we have an LDT entry for 429*0Sstevel@tonic-gate * it instead, add the base address to find the effective va. 430*0Sstevel@tonic-gate */ 431*0Sstevel@tonic-gate if ((ldt = p->p_ldt) != NULL) 432*0Sstevel@tonic-gate fp = (caddr_t)rp->r_sp + 433*0Sstevel@tonic-gate USEGD_GETBASE(&ldt[SELTOIDX(rp->r_ss)]); 434*0Sstevel@tonic-gate else 435*0Sstevel@tonic-gate fp = (caddr_t)rp->r_sp; 436*0Sstevel@tonic-gate } else 437*0Sstevel@tonic-gate fp = (caddr_t)rp->r_sp; 438*0Sstevel@tonic-gate sp = fp - minstacksz; 439*0Sstevel@tonic-gate 440*0Sstevel@tonic-gate /* 441*0Sstevel@tonic-gate * Make sure lwp hasn't trashed its stack 442*0Sstevel@tonic-gate */ 443*0Sstevel@tonic-gate if (((uintptr_t)sp & (STACK_ALIGN32 - 1)) != 0 || 444*0Sstevel@tonic-gate sp >= (caddr_t)(uintptr_t)USERLIMIT32 || 445*0Sstevel@tonic-gate fp >= (caddr_t)(uintptr_t)USERLIMIT32) { 446*0Sstevel@tonic-gate #ifdef DEBUG 447*0Sstevel@tonic-gate printf("sendsig32: bad signal stack cmd=%s, pid=%d, sig=%d\n", 448*0Sstevel@tonic-gate PTOU(p)->u_comm, p->p_pid, sig); 449*0Sstevel@tonic-gate printf("sigsp = 0x%p, action = 0x%p, upc = 0x%lx\n", 450*0Sstevel@tonic-gate (void *)sp, (void *)hdlr, (uintptr_t)upc); 451*0Sstevel@tonic-gate 452*0Sstevel@tonic-gate if (((uintptr_t)sp & (STACK_ALIGN32 - 1)) != 0) 453*0Sstevel@tonic-gate printf("bad stack alignment\n"); 454*0Sstevel@tonic-gate else 455*0Sstevel@tonic-gate printf("sp above USERLIMIT\n"); 456*0Sstevel@tonic-gate #endif 457*0Sstevel@tonic-gate return (0); 458*0Sstevel@tonic-gate } 459*0Sstevel@tonic-gate 460*0Sstevel@tonic-gate watched = watch_disable_addr((caddr_t)sp, minstacksz, S_WRITE); 461*0Sstevel@tonic-gate 462*0Sstevel@tonic-gate if (on_fault(&ljb)) 463*0Sstevel@tonic-gate goto badstack; 464*0Sstevel@tonic-gate 465*0Sstevel@tonic-gate if (sip != NULL) { 466*0Sstevel@tonic-gate siginfo32_t si32; 467*0Sstevel@tonic-gate zoneid_t zoneid; 468*0Sstevel@tonic-gate 469*0Sstevel@tonic-gate siginfo_kto32(sip, &si32); 470*0Sstevel@tonic-gate if (SI_FROMUSER(sip) && 471*0Sstevel@tonic-gate (zoneid = p->p_zone->zone_id) != GLOBAL_ZONEID && 472*0Sstevel@tonic-gate zoneid != sip->si_zoneid) { 473*0Sstevel@tonic-gate si32.si_pid = p->p_zone->zone_zsched->p_pid; 474*0Sstevel@tonic-gate si32.si_uid = 0; 475*0Sstevel@tonic-gate si32.si_ctid = -1; 476*0Sstevel@tonic-gate si32.si_zoneid = zoneid; 477*0Sstevel@tonic-gate } 478*0Sstevel@tonic-gate fp -= SA32(sizeof (si32)); 479*0Sstevel@tonic-gate uzero(fp, sizeof (si32)); 480*0Sstevel@tonic-gate copyout_noerr(&si32, fp, sizeof (si32)); 481*0Sstevel@tonic-gate sip_addr = (siginfo32_t *)fp; 482*0Sstevel@tonic-gate 483*0Sstevel@tonic-gate if (sig == SIGPROF && 484*0Sstevel@tonic-gate curthread->t_rprof != NULL && 485*0Sstevel@tonic-gate curthread->t_rprof->rp_anystate) { 486*0Sstevel@tonic-gate /* 487*0Sstevel@tonic-gate * We stand on our head to deal with 488*0Sstevel@tonic-gate * the real-time profiling signal. 489*0Sstevel@tonic-gate * Fill in the stuff that doesn't fit 490*0Sstevel@tonic-gate * in a normal k_siginfo structure. 491*0Sstevel@tonic-gate */ 492*0Sstevel@tonic-gate int i = sip->si_nsysarg; 493*0Sstevel@tonic-gate 494*0Sstevel@tonic-gate while (--i >= 0) 495*0Sstevel@tonic-gate suword32_noerr(&(sip_addr->si_sysarg[i]), 496*0Sstevel@tonic-gate (uint32_t)lwp->lwp_arg[i]); 497*0Sstevel@tonic-gate copyout_noerr(curthread->t_rprof->rp_state, 498*0Sstevel@tonic-gate sip_addr->si_mstate, 499*0Sstevel@tonic-gate sizeof (curthread->t_rprof->rp_state)); 500*0Sstevel@tonic-gate } 501*0Sstevel@tonic-gate } else 502*0Sstevel@tonic-gate sip_addr = NULL; 503*0Sstevel@tonic-gate 504*0Sstevel@tonic-gate /* save the current context on the user stack */ 505*0Sstevel@tonic-gate fp -= SA32(sizeof (*tuc)); 506*0Sstevel@tonic-gate uc = (ucontext32_t *)fp; 507*0Sstevel@tonic-gate tuc = kmem_alloc(sizeof (*tuc), KM_SLEEP); 508*0Sstevel@tonic-gate savecontext32(tuc, lwp->lwp_sigoldmask); 509*0Sstevel@tonic-gate copyout_noerr(tuc, uc, sizeof (*tuc)); 510*0Sstevel@tonic-gate kmem_free(tuc, sizeof (*tuc)); 511*0Sstevel@tonic-gate tuc = NULL; 512*0Sstevel@tonic-gate 513*0Sstevel@tonic-gate lwp->lwp_oldcontext = (uintptr_t)uc; 514*0Sstevel@tonic-gate 515*0Sstevel@tonic-gate if (newstack) { 516*0Sstevel@tonic-gate lwp->lwp_sigaltstack.ss_flags |= SS_ONSTACK; 517*0Sstevel@tonic-gate if (lwp->lwp_ustack) { 518*0Sstevel@tonic-gate stack32_t stk32; 519*0Sstevel@tonic-gate 520*0Sstevel@tonic-gate stk32.ss_sp = (caddr32_t)(uintptr_t) 521*0Sstevel@tonic-gate lwp->lwp_sigaltstack.ss_sp; 522*0Sstevel@tonic-gate stk32.ss_size = (size32_t) 523*0Sstevel@tonic-gate lwp->lwp_sigaltstack.ss_size; 524*0Sstevel@tonic-gate stk32.ss_flags = (int32_t) 525*0Sstevel@tonic-gate lwp->lwp_sigaltstack.ss_flags; 526*0Sstevel@tonic-gate copyout_noerr(&stk32, 527*0Sstevel@tonic-gate (stack32_t *)lwp->lwp_ustack, sizeof (stk32)); 528*0Sstevel@tonic-gate } 529*0Sstevel@tonic-gate } 530*0Sstevel@tonic-gate 531*0Sstevel@tonic-gate /* 532*0Sstevel@tonic-gate * Set up signal handler arguments 533*0Sstevel@tonic-gate */ 534*0Sstevel@tonic-gate { 535*0Sstevel@tonic-gate struct sigframe32 frame32; 536*0Sstevel@tonic-gate 537*0Sstevel@tonic-gate frame32.sip = (caddr32_t)(uintptr_t)sip_addr; 538*0Sstevel@tonic-gate frame32.ucp = (caddr32_t)(uintptr_t)uc; 539*0Sstevel@tonic-gate frame32.signo = sig; 540*0Sstevel@tonic-gate frame32.retaddr = 0xffffffff; /* never return! */ 541*0Sstevel@tonic-gate copyout_noerr(&frame32, sp, sizeof (frame32)); 542*0Sstevel@tonic-gate } 543*0Sstevel@tonic-gate 544*0Sstevel@tonic-gate no_fault(); 545*0Sstevel@tonic-gate if (watched) 546*0Sstevel@tonic-gate watch_enable_addr((caddr_t)sp, minstacksz, S_WRITE); 547*0Sstevel@tonic-gate 548*0Sstevel@tonic-gate rp->r_sp = (greg_t)(uintptr_t)sp; 549*0Sstevel@tonic-gate rp->r_pc = (greg_t)(uintptr_t)hdlr; 550*0Sstevel@tonic-gate rp->r_ps = PSL_USER | (rp->r_ps & PS_IOPL); 551*0Sstevel@tonic-gate 552*0Sstevel@tonic-gate if ((rp->r_cs & 0xffff) != U32CS_SEL || 553*0Sstevel@tonic-gate (rp->r_ss & 0xffff) != UDS_SEL) { 554*0Sstevel@tonic-gate /* 555*0Sstevel@tonic-gate * Try our best to deliver the signal. 556*0Sstevel@tonic-gate */ 557*0Sstevel@tonic-gate rp->r_cs = U32CS_SEL; 558*0Sstevel@tonic-gate rp->r_ss = UDS_SEL; 559*0Sstevel@tonic-gate } 560*0Sstevel@tonic-gate 561*0Sstevel@tonic-gate /* 562*0Sstevel@tonic-gate * Don't set lwp_eosys here. sendsig() is called via psig() after 563*0Sstevel@tonic-gate * lwp_eosys is handled, so setting it here would affect the next 564*0Sstevel@tonic-gate * system call. 565*0Sstevel@tonic-gate */ 566*0Sstevel@tonic-gate return (1); 567*0Sstevel@tonic-gate 568*0Sstevel@tonic-gate badstack: 569*0Sstevel@tonic-gate no_fault(); 570*0Sstevel@tonic-gate if (watched) 571*0Sstevel@tonic-gate watch_enable_addr((caddr_t)sp, minstacksz, S_WRITE); 572*0Sstevel@tonic-gate if (tuc) 573*0Sstevel@tonic-gate kmem_free(tuc, sizeof (*tuc)); 574*0Sstevel@tonic-gate #ifdef DEBUG 575*0Sstevel@tonic-gate printf("sendsig32: bad signal stack cmd=%s pid=%d, sig=%d\n", 576*0Sstevel@tonic-gate PTOU(p)->u_comm, p->p_pid, sig); 577*0Sstevel@tonic-gate printf("on fault, sigsp = 0x%p, action = 0x%p, upc = 0x%lx\n", 578*0Sstevel@tonic-gate (void *)sp, (void *)hdlr, (uintptr_t)upc); 579*0Sstevel@tonic-gate #endif 580*0Sstevel@tonic-gate return (0); 581*0Sstevel@tonic-gate } 582*0Sstevel@tonic-gate 583*0Sstevel@tonic-gate #endif /* _SYSCALL32_IMPL */ 584*0Sstevel@tonic-gate 585*0Sstevel@tonic-gate #elif defined(__i386) 586*0Sstevel@tonic-gate 587*0Sstevel@tonic-gate /* 588*0Sstevel@tonic-gate * An i386 SVR4/ABI signal frame looks like this on the stack: 589*0Sstevel@tonic-gate * 590*0Sstevel@tonic-gate * old %esp: 591*0Sstevel@tonic-gate * <a siginfo32_t [optional]> 592*0Sstevel@tonic-gate * <a ucontext32_t> 593*0Sstevel@tonic-gate * <pointer to that ucontext32_t> 594*0Sstevel@tonic-gate * <pointer to that siginfo32_t> 595*0Sstevel@tonic-gate * <signo> 596*0Sstevel@tonic-gate * new %esp: <return address (deliberately invalid)> 597*0Sstevel@tonic-gate */ 598*0Sstevel@tonic-gate struct sigframe { 599*0Sstevel@tonic-gate void (*retaddr)(); 600*0Sstevel@tonic-gate uint_t signo; 601*0Sstevel@tonic-gate siginfo_t *sip; 602*0Sstevel@tonic-gate ucontext_t *ucp; 603*0Sstevel@tonic-gate }; 604*0Sstevel@tonic-gate 605*0Sstevel@tonic-gate int 606*0Sstevel@tonic-gate sendsig(int sig, k_siginfo_t *sip, void (*hdlr)()) 607*0Sstevel@tonic-gate { 608*0Sstevel@tonic-gate volatile int minstacksz; 609*0Sstevel@tonic-gate int newstack; 610*0Sstevel@tonic-gate label_t ljb; 611*0Sstevel@tonic-gate volatile caddr_t sp; 612*0Sstevel@tonic-gate caddr_t fp; 613*0Sstevel@tonic-gate struct regs *rp; 614*0Sstevel@tonic-gate volatile greg_t upc; 615*0Sstevel@tonic-gate volatile proc_t *p = ttoproc(curthread); 616*0Sstevel@tonic-gate klwp_t *lwp = ttolwp(curthread); 617*0Sstevel@tonic-gate ucontext_t *volatile tuc = NULL; 618*0Sstevel@tonic-gate ucontext_t *uc; 619*0Sstevel@tonic-gate siginfo_t *sip_addr; 620*0Sstevel@tonic-gate volatile int watched; 621*0Sstevel@tonic-gate 622*0Sstevel@tonic-gate rp = lwptoregs(lwp); 623*0Sstevel@tonic-gate upc = rp->r_pc; 624*0Sstevel@tonic-gate 625*0Sstevel@tonic-gate minstacksz = SA(sizeof (struct sigframe)) + SA(sizeof (*uc)); 626*0Sstevel@tonic-gate if (sip != NULL) 627*0Sstevel@tonic-gate minstacksz += SA(sizeof (siginfo_t)); 628*0Sstevel@tonic-gate ASSERT((minstacksz & (STACK_ALIGN - 1ul)) == 0); 629*0Sstevel@tonic-gate 630*0Sstevel@tonic-gate /* 631*0Sstevel@tonic-gate * Figure out whether we will be handling this signal on 632*0Sstevel@tonic-gate * an alternate stack specified by the user. Then allocate 633*0Sstevel@tonic-gate * and validate the stack requirements for the signal handler 634*0Sstevel@tonic-gate * context. on_fault will catch any faults. 635*0Sstevel@tonic-gate */ 636*0Sstevel@tonic-gate newstack = sigismember(&u.u_sigonstack, sig) && 637*0Sstevel@tonic-gate !(lwp->lwp_sigaltstack.ss_flags & (SS_ONSTACK|SS_DISABLE)); 638*0Sstevel@tonic-gate 639*0Sstevel@tonic-gate if (newstack) { 640*0Sstevel@tonic-gate fp = (caddr_t)(SA((uintptr_t)lwp->lwp_sigaltstack.ss_sp) + 641*0Sstevel@tonic-gate SA(lwp->lwp_sigaltstack.ss_size) - STACK_ALIGN); 642*0Sstevel@tonic-gate } else if ((rp->r_ss & 0xffff) != UDS_SEL) { 643*0Sstevel@tonic-gate user_desc_t *ldt; 644*0Sstevel@tonic-gate /* 645*0Sstevel@tonic-gate * If the stack segment selector is -not- pointing at 646*0Sstevel@tonic-gate * the UDS_SEL descriptor and we have an LDT entry for 647*0Sstevel@tonic-gate * it instead, add the base address to find the effective va. 648*0Sstevel@tonic-gate */ 649*0Sstevel@tonic-gate if ((ldt = p->p_ldt) != NULL) 650*0Sstevel@tonic-gate fp = (caddr_t)rp->r_sp + 651*0Sstevel@tonic-gate USEGD_GETBASE(&ldt[SELTOIDX(rp->r_ss)]); 652*0Sstevel@tonic-gate else 653*0Sstevel@tonic-gate fp = (caddr_t)rp->r_sp; 654*0Sstevel@tonic-gate } else 655*0Sstevel@tonic-gate fp = (caddr_t)rp->r_sp; 656*0Sstevel@tonic-gate sp = fp - minstacksz; 657*0Sstevel@tonic-gate 658*0Sstevel@tonic-gate /* 659*0Sstevel@tonic-gate * Make sure lwp hasn't trashed its stack. 660*0Sstevel@tonic-gate */ 661*0Sstevel@tonic-gate if (((uintptr_t)sp & (STACK_ALIGN - 1ul)) != 0 || 662*0Sstevel@tonic-gate sp >= (caddr_t)USERLIMIT || fp >= (caddr_t)USERLIMIT) { 663*0Sstevel@tonic-gate #ifdef DEBUG 664*0Sstevel@tonic-gate printf("sendsig: bad signal stack cmd=%s, pid=%d, sig=%d\n", 665*0Sstevel@tonic-gate PTOU(p)->u_comm, p->p_pid, sig); 666*0Sstevel@tonic-gate printf("sigsp = 0x%p, action = 0x%p, upc = 0x%lx\n", 667*0Sstevel@tonic-gate (void *)sp, (void *)hdlr, (uintptr_t)upc); 668*0Sstevel@tonic-gate 669*0Sstevel@tonic-gate if (((uintptr_t)sp & (STACK_ALIGN - 1ul)) != 0) 670*0Sstevel@tonic-gate printf("bad stack alignment\n"); 671*0Sstevel@tonic-gate else 672*0Sstevel@tonic-gate printf("sp above USERLIMIT\n"); 673*0Sstevel@tonic-gate #endif 674*0Sstevel@tonic-gate return (0); 675*0Sstevel@tonic-gate } 676*0Sstevel@tonic-gate 677*0Sstevel@tonic-gate watched = watch_disable_addr((caddr_t)sp, minstacksz, S_WRITE); 678*0Sstevel@tonic-gate 679*0Sstevel@tonic-gate if (on_fault(&ljb)) 680*0Sstevel@tonic-gate goto badstack; 681*0Sstevel@tonic-gate 682*0Sstevel@tonic-gate if (sip != NULL) { 683*0Sstevel@tonic-gate zoneid_t zoneid; 684*0Sstevel@tonic-gate 685*0Sstevel@tonic-gate fp -= SA(sizeof (siginfo_t)); 686*0Sstevel@tonic-gate uzero(fp, sizeof (siginfo_t)); 687*0Sstevel@tonic-gate if (SI_FROMUSER(sip) && 688*0Sstevel@tonic-gate (zoneid = p->p_zone->zone_id) != GLOBAL_ZONEID && 689*0Sstevel@tonic-gate zoneid != sip->si_zoneid) { 690*0Sstevel@tonic-gate k_siginfo_t sani_sip = *sip; 691*0Sstevel@tonic-gate 692*0Sstevel@tonic-gate sani_sip.si_pid = p->p_zone->zone_zsched->p_pid; 693*0Sstevel@tonic-gate sani_sip.si_uid = 0; 694*0Sstevel@tonic-gate sani_sip.si_ctid = -1; 695*0Sstevel@tonic-gate sani_sip.si_zoneid = zoneid; 696*0Sstevel@tonic-gate copyout_noerr(&sani_sip, fp, sizeof (sani_sip)); 697*0Sstevel@tonic-gate } else 698*0Sstevel@tonic-gate copyout_noerr(sip, fp, sizeof (*sip)); 699*0Sstevel@tonic-gate sip_addr = (siginfo_t *)fp; 700*0Sstevel@tonic-gate 701*0Sstevel@tonic-gate if (sig == SIGPROF && 702*0Sstevel@tonic-gate curthread->t_rprof != NULL && 703*0Sstevel@tonic-gate curthread->t_rprof->rp_anystate) { 704*0Sstevel@tonic-gate /* 705*0Sstevel@tonic-gate * We stand on our head to deal with 706*0Sstevel@tonic-gate * the real time profiling signal. 707*0Sstevel@tonic-gate * Fill in the stuff that doesn't fit 708*0Sstevel@tonic-gate * in a normal k_siginfo structure. 709*0Sstevel@tonic-gate */ 710*0Sstevel@tonic-gate int i = sip->si_nsysarg; 711*0Sstevel@tonic-gate 712*0Sstevel@tonic-gate while (--i >= 0) 713*0Sstevel@tonic-gate suword32_noerr(&(sip_addr->si_sysarg[i]), 714*0Sstevel@tonic-gate (uint32_t)lwp->lwp_arg[i]); 715*0Sstevel@tonic-gate copyout_noerr(curthread->t_rprof->rp_state, 716*0Sstevel@tonic-gate sip_addr->si_mstate, 717*0Sstevel@tonic-gate sizeof (curthread->t_rprof->rp_state)); 718*0Sstevel@tonic-gate } 719*0Sstevel@tonic-gate } else 720*0Sstevel@tonic-gate sip_addr = NULL; 721*0Sstevel@tonic-gate 722*0Sstevel@tonic-gate /* save the current context on the user stack */ 723*0Sstevel@tonic-gate fp -= SA(sizeof (*tuc)); 724*0Sstevel@tonic-gate uc = (ucontext_t *)fp; 725*0Sstevel@tonic-gate tuc = kmem_alloc(sizeof (*tuc), KM_SLEEP); 726*0Sstevel@tonic-gate savecontext(tuc, lwp->lwp_sigoldmask); 727*0Sstevel@tonic-gate copyout_noerr(tuc, uc, sizeof (*tuc)); 728*0Sstevel@tonic-gate kmem_free(tuc, sizeof (*tuc)); 729*0Sstevel@tonic-gate tuc = NULL; 730*0Sstevel@tonic-gate 731*0Sstevel@tonic-gate lwp->lwp_oldcontext = (uintptr_t)uc; 732*0Sstevel@tonic-gate 733*0Sstevel@tonic-gate if (newstack) { 734*0Sstevel@tonic-gate lwp->lwp_sigaltstack.ss_flags |= SS_ONSTACK; 735*0Sstevel@tonic-gate if (lwp->lwp_ustack) 736*0Sstevel@tonic-gate copyout_noerr(&lwp->lwp_sigaltstack, 737*0Sstevel@tonic-gate (stack_t *)lwp->lwp_ustack, sizeof (stack_t)); 738*0Sstevel@tonic-gate } 739*0Sstevel@tonic-gate 740*0Sstevel@tonic-gate /* 741*0Sstevel@tonic-gate * Set up signal handler arguments 742*0Sstevel@tonic-gate */ 743*0Sstevel@tonic-gate { 744*0Sstevel@tonic-gate struct sigframe frame; 745*0Sstevel@tonic-gate 746*0Sstevel@tonic-gate frame.sip = sip_addr; 747*0Sstevel@tonic-gate frame.ucp = uc; 748*0Sstevel@tonic-gate frame.signo = sig; 749*0Sstevel@tonic-gate frame.retaddr = (void (*)())0xffffffff; /* never return! */ 750*0Sstevel@tonic-gate copyout_noerr(&frame, sp, sizeof (frame)); 751*0Sstevel@tonic-gate } 752*0Sstevel@tonic-gate 753*0Sstevel@tonic-gate no_fault(); 754*0Sstevel@tonic-gate if (watched) 755*0Sstevel@tonic-gate watch_enable_addr((caddr_t)sp, minstacksz, S_WRITE); 756*0Sstevel@tonic-gate 757*0Sstevel@tonic-gate rp->r_sp = (greg_t)sp; 758*0Sstevel@tonic-gate rp->r_pc = (greg_t)hdlr; 759*0Sstevel@tonic-gate rp->r_ps = PSL_USER | (rp->r_ps & PS_IOPL); 760*0Sstevel@tonic-gate 761*0Sstevel@tonic-gate if ((rp->r_cs & 0xffff) != UCS_SEL || 762*0Sstevel@tonic-gate (rp->r_ss & 0xffff) != UDS_SEL) { 763*0Sstevel@tonic-gate rp->r_cs = UCS_SEL; 764*0Sstevel@tonic-gate rp->r_ss = UDS_SEL; 765*0Sstevel@tonic-gate } 766*0Sstevel@tonic-gate 767*0Sstevel@tonic-gate /* 768*0Sstevel@tonic-gate * Don't set lwp_eosys here. sendsig() is called via psig() after 769*0Sstevel@tonic-gate * lwp_eosys is handled, so setting it here would affect the next 770*0Sstevel@tonic-gate * system call. 771*0Sstevel@tonic-gate */ 772*0Sstevel@tonic-gate return (1); 773*0Sstevel@tonic-gate 774*0Sstevel@tonic-gate badstack: 775*0Sstevel@tonic-gate no_fault(); 776*0Sstevel@tonic-gate if (watched) 777*0Sstevel@tonic-gate watch_enable_addr((caddr_t)sp, minstacksz, S_WRITE); 778*0Sstevel@tonic-gate if (tuc) 779*0Sstevel@tonic-gate kmem_free(tuc, sizeof (*tuc)); 780*0Sstevel@tonic-gate #ifdef DEBUG 781*0Sstevel@tonic-gate printf("sendsig: bad signal stack cmd=%s, pid=%d, sig=%d\n", 782*0Sstevel@tonic-gate PTOU(p)->u_comm, p->p_pid, sig); 783*0Sstevel@tonic-gate printf("on fault, sigsp = 0x%p, action = 0x%p, upc = 0x%lx\n", 784*0Sstevel@tonic-gate (void *)sp, (void *)hdlr, (uintptr_t)upc); 785*0Sstevel@tonic-gate #endif 786*0Sstevel@tonic-gate return (0); 787*0Sstevel@tonic-gate } 788*0Sstevel@tonic-gate 789*0Sstevel@tonic-gate #endif /* __i386 */ 790