2 * SPDX-License-Identifier: BSD-4-Clause AND BSD-2-Clause-FreeBSD
4 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
5 * Copyright (C) 1995, 1996 TooLs GmbH.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by TooLs GmbH.
19 * 4. The name of TooLs GmbH may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 * Copyright (C) 2001 Benno Rice
35 * All rights reserved.
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
46 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
47 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
48 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
49 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
50 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
51 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
52 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
53 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
54 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
55 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
56 * $NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $
59 #include <sys/cdefs.h>
60 __FBSDID("$FreeBSD$");
62 #include "opt_fpu_emu.h"
64 #include <sys/param.h>
66 #include <sys/systm.h>
73 #include <sys/imgact.h>
74 #include <sys/kernel.h>
77 #include <sys/malloc.h>
78 #include <sys/mutex.h>
79 #include <sys/signalvar.h>
80 #include <sys/syscallsubr.h>
81 #include <sys/syscall.h>
82 #include <sys/sysent.h>
83 #include <sys/sysproto.h>
84 #include <sys/ucontext.h>
87 #include <machine/altivec.h>
88 #include <machine/cpu.h>
89 #include <machine/elf.h>
90 #include <machine/fpu.h>
91 #include <machine/pcb.h>
92 #include <machine/reg.h>
93 #include <machine/sigframe.h>
94 #include <machine/trap.h>
95 #include <machine/vmparam.h>
100 #include <powerpc/fpu/fpu_extern.h>
103 #ifdef COMPAT_FREEBSD32
104 #include <compat/freebsd32/freebsd32_signal.h>
105 #include <compat/freebsd32/freebsd32_util.h>
106 #include <compat/freebsd32/freebsd32_proto.h>
108 typedef struct __ucontext32 {
110 mcontext32_t uc_mcontext;
112 struct sigaltstack32 uc_stack;
114 uint32_t __spare__[4];
119 struct siginfo32 sf_si;
122 static int grab_mcontext32(struct thread *td, mcontext32_t *, int flags);
125 static int grab_mcontext(struct thread *, mcontext_t *, int);
127 static void cleanup_power_extras(struct thread *);
130 extern struct sysentvec elf64_freebsd_sysvec_v2;
134 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
136 struct trapframe *tf;
141 #ifdef COMPAT_FREEBSD32
142 struct siginfo32 siginfo32;
143 struct sigframe32 sf32;
148 int oonstack, rndfsize;
154 PROC_LOCK_ASSERT(p, MA_OWNED);
157 mtx_assert(&psp->ps_mtx, MA_OWNED);
161 * Fill siginfo structure.
163 ksi->ksi_info.si_signo = ksi->ksi_signo;
164 ksi->ksi_info.si_addr =
165 (void *)((tf->exc == EXC_DSI || tf->exc == EXC_DSE) ?
168 #ifdef COMPAT_FREEBSD32
169 if (SV_PROC_FLAG(p, SV_ILP32)) {
170 siginfo_to_siginfo32(&ksi->ksi_info, &siginfo32);
171 sig = siginfo32.si_signo;
172 code = siginfo32.si_code;
173 sfp = (caddr_t)&sf32;
174 sfpsize = sizeof(sf32);
175 rndfsize = roundup(sizeof(sf32), 16);
176 sp = (uint32_t)tf->fixreg[1];
177 oonstack = sigonstack(sp);
183 memset(&sf32, 0, sizeof(sf32));
184 grab_mcontext32(td, &sf32.sf_uc.uc_mcontext, 0);
186 sf32.sf_uc.uc_sigmask = *mask;
187 sf32.sf_uc.uc_stack.ss_sp = (uintptr_t)td->td_sigstk.ss_sp;
188 sf32.sf_uc.uc_stack.ss_size = (uint32_t)td->td_sigstk.ss_size;
189 sf32.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
190 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
192 sf32.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0;
195 sig = ksi->ksi_signo;
196 code = ksi->ksi_code;
198 sfpsize = sizeof(sf);
201 * 64-bit PPC defines a 288 byte scratch region
204 rndfsize = 288 + roundup(sizeof(sf), 48);
206 rndfsize = roundup(sizeof(sf), 16);
209 oonstack = sigonstack(sp);
215 memset(&sf, 0, sizeof(sf));
216 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
218 sf.sf_uc.uc_sigmask = *mask;
219 sf.sf_uc.uc_stack = td->td_sigstk;
220 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
221 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
223 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0;
224 #ifdef COMPAT_FREEBSD32
228 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
232 * Allocate and validate space for the signal handler context.
234 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
235 SIGISMEMBER(psp->ps_sigonstack, sig)) {
236 usfp = (void *)(((uintptr_t)td->td_sigstk.ss_sp +
237 td->td_sigstk.ss_size - rndfsize) & ~0xFul);
239 usfp = (void *)((sp - rndfsize) & ~0xFul);
243 * Save the floating-point state, if necessary, then copy it.
248 * Set up the registers to return to sigcode.
250 * r1/sp - sigframe ptr
251 * lr - sig function, dispatched to by blrl in trampoline
253 * r4 - SIGINFO ? &siginfo : exception code
255 * srr0 - trampoline function addr
257 tf->lr = (register_t)catcher;
258 tf->fixreg[1] = (register_t)usfp;
259 tf->fixreg[FIRSTARG] = sig;
260 #ifdef COMPAT_FREEBSD32
261 tf->fixreg[FIRSTARG+2] = (register_t)usfp +
262 ((SV_PROC_FLAG(p, SV_ILP32)) ?
263 offsetof(struct sigframe32, sf_uc) :
264 offsetof(struct sigframe, sf_uc));
266 tf->fixreg[FIRSTARG+2] = (register_t)usfp +
267 offsetof(struct sigframe, sf_uc);
269 if (SIGISMEMBER(psp->ps_siginfo, sig)) {
271 * Signal handler installed with SA_SIGINFO.
273 #ifdef COMPAT_FREEBSD32
274 if (SV_PROC_FLAG(p, SV_ILP32)) {
275 sf32.sf_si = siginfo32;
276 tf->fixreg[FIRSTARG+1] = (register_t)usfp +
277 offsetof(struct sigframe32, sf_si);
278 sf32.sf_si = siginfo32;
281 tf->fixreg[FIRSTARG+1] = (register_t)usfp +
282 offsetof(struct sigframe, sf_si);
283 sf.sf_si = ksi->ksi_info;
284 #ifdef COMPAT_FREEBSD32
288 /* Old FreeBSD-style arguments. */
289 tf->fixreg[FIRSTARG+1] = code;
290 tf->fixreg[FIRSTARG+3] = (tf->exc == EXC_DSI) ?
293 mtx_unlock(&psp->ps_mtx);
296 tf->srr0 = (register_t)p->p_sysent->sv_sigcode_base;
299 * copy the frame out to userland.
301 if (copyout(sfp, usfp, sfpsize) != 0) {
303 * Process has trashed its stack. Kill it.
305 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp);
310 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td,
311 tf->srr0, tf->fixreg[1]);
314 mtx_lock(&psp->ps_mtx);
318 sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
323 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
325 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
326 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
330 error = set_mcontext(td, &uc.uc_mcontext);
334 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
336 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x",
337 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]);
339 return (EJUSTRETURN);
342 #ifdef COMPAT_FREEBSD4
344 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap)
347 return sys_sigreturn(td, (struct sigreturn_args *)uap);
352 * Construct a PCB from a trapframe. This is called from kdb_trap() where
353 * we want to start a backtrace from the function that caused us to enter
354 * the debugger. We have the context in the trapframe, but base the trace
355 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
356 * enough for a backtrace.
359 makectx(struct trapframe *tf, struct pcb *pcb)
362 pcb->pcb_lr = tf->srr0;
363 pcb->pcb_sp = tf->fixreg[1];
367 * get_mcontext/sendsig helper routine that doesn't touch the
371 grab_mcontext(struct thread *td, mcontext_t *mcp, int flags)
378 memset(mcp, 0, sizeof(mcontext_t));
380 mcp->mc_vers = _MC_VERSION;
382 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe));
383 if (flags & GET_MC_CLEAR_RET) {
389 * This assumes that floating-point context is *not* lazy,
390 * so if the thread has used FP there would have been a
391 * FP-unavailable exception that would have set things up
394 if (pcb->pcb_flags & PCB_FPREGS) {
395 if (pcb->pcb_flags & PCB_FPU) {
396 KASSERT(td == curthread,
397 ("get_mcontext: fp save not curthread"));
402 mcp->mc_flags |= _MC_FP_VALID;
403 memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double));
404 for (i = 0; i < 32; i++)
405 memcpy(&mcp->mc_fpreg[i], &pcb->pcb_fpu.fpr[i].fpr,
409 if (pcb->pcb_flags & PCB_VSX) {
410 for (i = 0; i < 32; i++)
411 memcpy(&mcp->mc_vsxfpreg[i],
412 &pcb->pcb_fpu.fpr[i].vsr[2], sizeof(double));
416 * Repeat for Altivec context
419 if (pcb->pcb_flags & PCB_VEC) {
420 KASSERT(td == curthread,
421 ("get_mcontext: fp save not curthread"));
425 mcp->mc_flags |= _MC_AV_VALID;
426 mcp->mc_vscr = pcb->pcb_vec.vscr;
427 mcp->mc_vrsave = pcb->pcb_vec.vrsave;
428 memcpy(mcp->mc_avec, pcb->pcb_vec.vr, sizeof(mcp->mc_avec));
431 mcp->mc_len = sizeof(*mcp);
437 get_mcontext(struct thread *td, mcontext_t *mcp, int flags)
441 error = grab_mcontext(td, mcp, flags);
443 PROC_LOCK(curthread->td_proc);
444 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]);
445 PROC_UNLOCK(curthread->td_proc);
452 set_mcontext(struct thread *td, mcontext_t *mcp)
455 struct trapframe *tf;
462 if (mcp->mc_vers != _MC_VERSION || mcp->mc_len != sizeof(*mcp))
466 * Don't let the user change privileged MSR bits.
468 * psl_userstatic is used here to mask off any bits that can
469 * legitimately vary between user contexts (Floating point
470 * exception control and any facilities that we are using the
471 * "enable on first use" pattern with.)
473 * All other bits are required to match psl_userset(32).
475 * Remember to update the platform cpu_init code when implementing
476 * support for a new conditional facility!
478 if ((mcp->mc_srr1 & psl_userstatic) != (tf->srr1 & psl_userstatic)) {
482 /* Copy trapframe, preserving TLS pointer across context change */
483 if (SV_PROC_FLAG(td->td_proc, SV_LP64))
484 tls = tf->fixreg[13];
487 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame));
488 if (SV_PROC_FLAG(td->td_proc, SV_LP64))
489 tf->fixreg[13] = tls;
494 * Force the FPU back off to ensure the new context will not bypass
495 * the enable_fpu() setup code accidentally.
497 * This prevents an issue where a process that uses floating point
498 * inside a signal handler could end up in a state where the MSR
499 * did not match pcb_flags.
501 * Additionally, ensure VSX is disabled as well, as it is illegal
502 * to leave it turned on when FP or VEC are off.
504 tf->srr1 &= ~(PSL_FP | PSL_VSX);
505 pcb->pcb_flags &= ~(PCB_FPU | PCB_VSX);
507 if (mcp->mc_flags & _MC_FP_VALID) {
508 /* enable_fpu() will happen lazily on a fault */
509 pcb->pcb_flags |= PCB_FPREGS;
510 memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double));
511 bzero(pcb->pcb_fpu.fpr, sizeof(pcb->pcb_fpu.fpr));
512 for (i = 0; i < 32; i++) {
513 memcpy(&pcb->pcb_fpu.fpr[i].fpr, &mcp->mc_fpreg[i],
515 memcpy(&pcb->pcb_fpu.fpr[i].vsr[2],
516 &mcp->mc_vsxfpreg[i], sizeof(double));
520 if (mcp->mc_flags & _MC_AV_VALID) {
521 if ((pcb->pcb_flags & PCB_VEC) != PCB_VEC) {
526 pcb->pcb_vec.vscr = mcp->mc_vscr;
527 pcb->pcb_vec.vrsave = mcp->mc_vrsave;
528 memcpy(pcb->pcb_vec.vr, mcp->mc_avec, sizeof(mcp->mc_avec));
530 tf->srr1 &= ~PSL_VEC;
531 pcb->pcb_flags &= ~PCB_VEC;
538 * Clean up extra POWER state. Some per-process registers and states are not
539 * managed by the MSR, so must be cleaned up explicitly on thread exit.
541 * Currently this includes:
542 * DSCR -- Data stream control register (PowerISA 2.06+)
543 * FSCR -- Facility Status and Control Register (PowerISA 2.07+)
546 cleanup_power_extras(struct thread *td)
553 pcb_flags = td->td_pcb->pcb_flags;
554 /* Clean up registers not managed by MSR. */
555 if (pcb_flags & PCB_CFSCR)
557 if (pcb_flags & PCB_CDSCR)
562 * Set set up registers on exec.
565 exec_setregs(struct thread *td, struct image_params *imgp, uintptr_t stack)
567 struct trapframe *tf;
571 bzero(tf, sizeof *tf);
573 tf->fixreg[1] = -roundup(-stack + 48, 16);
575 tf->fixreg[1] = -roundup(-stack + 8, 16);
579 * Set up arguments for _start():
580 * _start(argc, argv, envp, obj, cleanup, ps_strings);
583 * - obj and cleanup are the auxilliary and termination
584 * vectors. They are fixed up by ld.elf_so.
585 * - ps_strings is a NetBSD extention, and will be
586 * ignored by executables which are strictly
587 * compliant with the SVR4 ABI.
590 /* Collect argc from the user stack */
591 argc = fuword((void *)stack);
593 tf->fixreg[3] = argc;
594 tf->fixreg[4] = stack + sizeof(register_t);
595 tf->fixreg[5] = stack + (2 + argc)*sizeof(register_t);
596 tf->fixreg[6] = 0; /* auxillary vector */
597 tf->fixreg[7] = 0; /* termination vector */
598 tf->fixreg[8] = (register_t)imgp->ps_strings; /* NetBSD extension */
600 tf->srr0 = imgp->entry_addr;
602 tf->fixreg[12] = imgp->entry_addr;
604 tf->srr1 = psl_userset | PSL_FE_DFLT;
605 cleanup_power_extras(td);
606 td->td_pcb->pcb_flags = 0;
609 #ifdef COMPAT_FREEBSD32
611 ppc32_setregs(struct thread *td, struct image_params *imgp, uintptr_t stack)
613 struct trapframe *tf;
617 bzero(tf, sizeof *tf);
618 tf->fixreg[1] = -roundup(-stack + 8, 16);
620 argc = fuword32((void *)stack);
622 tf->fixreg[3] = argc;
623 tf->fixreg[4] = stack + sizeof(uint32_t);
624 tf->fixreg[5] = stack + (2 + argc)*sizeof(uint32_t);
625 tf->fixreg[6] = 0; /* auxillary vector */
626 tf->fixreg[7] = 0; /* termination vector */
627 tf->fixreg[8] = (register_t)imgp->ps_strings; /* NetBSD extension */
629 tf->srr0 = imgp->entry_addr;
630 tf->srr1 = psl_userset32 | PSL_FE_DFLT;
631 cleanup_power_extras(td);
632 td->td_pcb->pcb_flags = 0;
637 fill_regs(struct thread *td, struct reg *regs)
639 struct trapframe *tf;
642 memcpy(regs, tf, sizeof(struct reg));
648 fill_dbregs(struct thread *td, struct dbreg *dbregs)
650 /* No debug registers on PowerPC */
655 fill_fpregs(struct thread *td, struct fpreg *fpregs)
662 if ((pcb->pcb_flags & PCB_FPREGS) == 0)
663 memset(fpregs, 0, sizeof(struct fpreg));
665 memcpy(&fpregs->fpscr, &pcb->pcb_fpu.fpscr, sizeof(double));
666 for (i = 0; i < 32; i++)
667 memcpy(&fpregs->fpreg[i], &pcb->pcb_fpu.fpr[i].fpr,
675 set_regs(struct thread *td, struct reg *regs)
677 struct trapframe *tf;
680 memcpy(tf, regs, sizeof(struct reg));
686 set_dbregs(struct thread *td, struct dbreg *dbregs)
688 /* No debug registers on PowerPC */
693 set_fpregs(struct thread *td, struct fpreg *fpregs)
699 pcb->pcb_flags |= PCB_FPREGS;
700 memcpy(&pcb->pcb_fpu.fpscr, &fpregs->fpscr, sizeof(double));
701 for (i = 0; i < 32; i++) {
702 memcpy(&pcb->pcb_fpu.fpr[i].fpr, &fpregs->fpreg[i],
709 #ifdef COMPAT_FREEBSD32
711 set_regs32(struct thread *td, struct reg32 *regs)
713 struct trapframe *tf;
717 for (i = 0; i < 32; i++)
718 tf->fixreg[i] = regs->fixreg[i];
729 fill_regs32(struct thread *td, struct reg32 *regs)
731 struct trapframe *tf;
735 for (i = 0; i < 32; i++)
736 regs->fixreg[i] = tf->fixreg[i];
747 grab_mcontext32(struct thread *td, mcontext32_t *mcp, int flags)
752 error = grab_mcontext(td, &mcp64, flags);
756 mcp->mc_vers = mcp64.mc_vers;
757 mcp->mc_flags = mcp64.mc_flags;
758 mcp->mc_onstack = mcp64.mc_onstack;
759 mcp->mc_len = mcp64.mc_len;
760 memcpy(mcp->mc_avec,mcp64.mc_avec,sizeof(mcp64.mc_avec));
761 memcpy(mcp->mc_av,mcp64.mc_av,sizeof(mcp64.mc_av));
762 for (i = 0; i < 42; i++)
763 mcp->mc_frame[i] = mcp64.mc_frame[i];
764 memcpy(mcp->mc_fpreg,mcp64.mc_fpreg,sizeof(mcp64.mc_fpreg));
765 memcpy(mcp->mc_vsxfpreg,mcp64.mc_vsxfpreg,sizeof(mcp64.mc_vsxfpreg));
771 get_mcontext32(struct thread *td, mcontext32_t *mcp, int flags)
775 error = grab_mcontext32(td, mcp, flags);
777 PROC_LOCK(curthread->td_proc);
778 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]);
779 PROC_UNLOCK(curthread->td_proc);
786 set_mcontext32(struct thread *td, mcontext32_t *mcp)
791 mcp64.mc_vers = mcp->mc_vers;
792 mcp64.mc_flags = mcp->mc_flags;
793 mcp64.mc_onstack = mcp->mc_onstack;
794 mcp64.mc_len = mcp->mc_len;
795 memcpy(mcp64.mc_avec,mcp->mc_avec,sizeof(mcp64.mc_avec));
796 memcpy(mcp64.mc_av,mcp->mc_av,sizeof(mcp64.mc_av));
797 for (i = 0; i < 42; i++)
798 mcp64.mc_frame[i] = mcp->mc_frame[i];
799 mcp64.mc_srr1 |= (td->td_frame->srr1 & 0xFFFFFFFF00000000ULL);
800 memcpy(mcp64.mc_fpreg,mcp->mc_fpreg,sizeof(mcp64.mc_fpreg));
801 memcpy(mcp64.mc_vsxfpreg,mcp->mc_vsxfpreg,sizeof(mcp64.mc_vsxfpreg));
803 error = set_mcontext(td, &mcp64);
809 #ifdef COMPAT_FREEBSD32
811 freebsd32_sigreturn(struct thread *td, struct freebsd32_sigreturn_args *uap)
816 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
818 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
819 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
823 error = set_mcontext32(td, &uc.uc_mcontext);
827 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
829 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x",
830 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]);
832 return (EJUSTRETURN);
836 * The first two fields of a ucontext_t are the signal mask and the machine
837 * context. The next field is uc_link; we want to avoid destroying the link
838 * when copying out contexts.
840 #define UC32_COPY_SIZE offsetof(ucontext32_t, uc_link)
843 freebsd32_getcontext(struct thread *td, struct freebsd32_getcontext_args *uap)
848 if (uap->ucp == NULL)
851 bzero(&uc, sizeof(uc));
852 get_mcontext32(td, &uc.uc_mcontext, GET_MC_CLEAR_RET);
853 PROC_LOCK(td->td_proc);
854 uc.uc_sigmask = td->td_sigmask;
855 PROC_UNLOCK(td->td_proc);
856 ret = copyout(&uc, uap->ucp, UC32_COPY_SIZE);
862 freebsd32_setcontext(struct thread *td, struct freebsd32_setcontext_args *uap)
867 if (uap->ucp == NULL)
870 ret = copyin(uap->ucp, &uc, UC32_COPY_SIZE);
872 ret = set_mcontext32(td, &uc.uc_mcontext);
874 kern_sigprocmask(td, SIG_SETMASK,
875 &uc.uc_sigmask, NULL, 0);
879 return (ret == 0 ? EJUSTRETURN : ret);
883 freebsd32_swapcontext(struct thread *td, struct freebsd32_swapcontext_args *uap)
888 if (uap->oucp == NULL || uap->ucp == NULL)
891 bzero(&uc, sizeof(uc));
892 get_mcontext32(td, &uc.uc_mcontext, GET_MC_CLEAR_RET);
893 PROC_LOCK(td->td_proc);
894 uc.uc_sigmask = td->td_sigmask;
895 PROC_UNLOCK(td->td_proc);
896 ret = copyout(&uc, uap->oucp, UC32_COPY_SIZE);
898 ret = copyin(uap->ucp, &uc, UC32_COPY_SIZE);
900 ret = set_mcontext32(td, &uc.uc_mcontext);
902 kern_sigprocmask(td, SIG_SETMASK,
903 &uc.uc_sigmask, NULL, 0);
908 return (ret == 0 ? EJUSTRETURN : ret);
914 cpu_set_syscall_retval(struct thread *td, int error)
917 struct trapframe *tf;
920 if (error == EJUSTRETURN)
926 if (tf->fixreg[0] == SYS___syscall &&
927 (SV_PROC_FLAG(p, SV_ILP32))) {
928 int code = tf->fixreg[FIRSTARG + 1];
930 #if defined(COMPAT_FREEBSD6) && defined(SYS_freebsd6_lseek)
931 code != SYS_freebsd6_lseek &&
933 code != SYS_lseek) ? 1 : 0;
941 * 64-bit return, 32-bit syscall. Fixup byte order
943 tf->fixreg[FIRSTARG] = 0;
944 tf->fixreg[FIRSTARG + 1] = td->td_retval[0];
946 tf->fixreg[FIRSTARG] = td->td_retval[0];
947 tf->fixreg[FIRSTARG + 1] = td->td_retval[1];
949 tf->cr &= ~0x10000000; /* Unset summary overflow */
953 * Set user's pc back to redo the system call.
958 tf->fixreg[FIRSTARG] = error;
959 tf->cr |= 0x10000000; /* Set summary overflow */
965 * Threading functions
968 cpu_thread_exit(struct thread *td)
970 cleanup_power_extras(td);
974 cpu_thread_clean(struct thread *td)
979 cpu_thread_alloc(struct thread *td)
983 pcb = (struct pcb *)((td->td_kstack + td->td_kstack_pages * PAGE_SIZE -
984 sizeof(struct pcb)) & ~0x2fUL);
986 td->td_frame = (struct trapframe *)pcb - 1;
990 cpu_thread_free(struct thread *td)
995 cpu_set_user_tls(struct thread *td, void *tls_base)
998 if (SV_PROC_FLAG(td->td_proc, SV_LP64))
999 td->td_frame->fixreg[13] = (register_t)tls_base + 0x7010;
1001 td->td_frame->fixreg[2] = (register_t)tls_base + 0x7008;
1006 cpu_copy_thread(struct thread *td, struct thread *td0)
1009 struct trapframe *tf;
1010 struct callframe *cf;
1014 /* Copy the upcall pcb */
1015 bcopy(td0->td_pcb, pcb2, sizeof(*pcb2));
1017 /* Create a stack for the new thread */
1019 bcopy(td0->td_frame, tf, sizeof(struct trapframe));
1020 tf->fixreg[FIRSTARG] = 0;
1021 tf->fixreg[FIRSTARG + 1] = 0;
1022 tf->cr &= ~0x10000000;
1024 /* Set registers for trampoline to user mode. */
1025 cf = (struct callframe *)tf - 1;
1026 memset(cf, 0, sizeof(struct callframe));
1027 cf->cf_func = (register_t)fork_return;
1028 cf->cf_arg0 = (register_t)td;
1029 cf->cf_arg1 = (register_t)tf;
1031 pcb2->pcb_sp = (register_t)cf;
1032 #if defined(__powerpc64__) && (!defined(_CALL_ELF) || _CALL_ELF == 1)
1033 pcb2->pcb_lr = ((register_t *)fork_trampoline)[0];
1034 pcb2->pcb_toc = ((register_t *)fork_trampoline)[1];
1036 pcb2->pcb_lr = (register_t)fork_trampoline;
1037 pcb2->pcb_context[0] = pcb2->pcb_lr;
1039 pcb2->pcb_cpu.aim.usr_vsid = 0;
1041 pcb2->pcb_vec.vscr = SPEFSCR_FINVE | SPEFSCR_FDBZE |
1042 SPEFSCR_FUNFE | SPEFSCR_FOVFE;
1045 /* Setup to release spin count in fork_exit(). */
1046 td->td_md.md_spinlock_count = 1;
1047 td->td_md.md_saved_msr = psl_kernset;
1051 cpu_set_upcall(struct thread *td, void (*entry)(void *), void *arg,
1054 struct trapframe *tf;
1058 /* align stack and alloc space for frame ptr and saved LR */
1059 #ifdef __powerpc64__
1060 sp = ((uintptr_t)stack->ss_sp + stack->ss_size - 48) &
1063 sp = ((uintptr_t)stack->ss_sp + stack->ss_size - 8) &
1066 bzero(tf, sizeof(struct trapframe));
1068 tf->fixreg[1] = (register_t)sp;
1069 tf->fixreg[3] = (register_t)arg;
1070 if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) {
1071 tf->srr0 = (register_t)entry;
1072 #ifdef __powerpc64__
1073 tf->srr1 = psl_userset32 | PSL_FE_DFLT;
1075 tf->srr1 = psl_userset | PSL_FE_DFLT;
1078 #ifdef __powerpc64__
1079 if (td->td_proc->p_sysent == &elf64_freebsd_sysvec_v2) {
1080 tf->srr0 = (register_t)entry;
1081 /* ELFv2 ABI requires that the global entry point be in r12. */
1082 tf->fixreg[12] = (register_t)entry;
1085 register_t entry_desc[3];
1086 (void)copyin((void *)entry, entry_desc, sizeof(entry_desc));
1087 tf->srr0 = entry_desc[0];
1088 tf->fixreg[2] = entry_desc[1];
1089 tf->fixreg[11] = entry_desc[2];
1091 tf->srr1 = psl_userset | PSL_FE_DFLT;
1095 td->td_pcb->pcb_flags = 0;
1097 td->td_pcb->pcb_vec.vscr = SPEFSCR_FINVE | SPEFSCR_FDBZE |
1098 SPEFSCR_FUNFE | SPEFSCR_FOVFE;
1101 td->td_retval[0] = (register_t)entry;
1102 td->td_retval[1] = 0;
1106 emulate_mfspr(int spr, int reg, struct trapframe *frame){
1111 if (spr == SPR_DSCR || spr == SPR_DSCRP) {
1112 if (!(cpu_features2 & PPC_FEATURE2_DSCR))
1114 // If DSCR was never set, get the default DSCR
1115 if ((td->td_pcb->pcb_flags & PCB_CDSCR) == 0)
1116 td->td_pcb->pcb_dscr = mfspr(SPR_DSCRP);
1118 frame->fixreg[reg] = td->td_pcb->pcb_dscr;
1126 emulate_mtspr(int spr, int reg, struct trapframe *frame){
1131 if (spr == SPR_DSCR || spr == SPR_DSCRP) {
1132 if (!(cpu_features2 & PPC_FEATURE2_DSCR))
1134 td->td_pcb->pcb_flags |= PCB_CDSCR;
1135 td->td_pcb->pcb_dscr = frame->fixreg[reg];
1136 mtspr(SPR_DSCRP, frame->fixreg[reg]);
1143 #define XFX 0xFC0007FF
1145 ppc_instr_emulate(struct trapframe *frame, struct thread *td)
1152 instr = fuword32((void *)frame->srr0);
1155 if ((instr & 0xfc1fffff) == 0x7c1f42a6) { /* mfpvr */
1156 reg = (instr & ~0xfc1fffff) >> 21;
1157 frame->fixreg[reg] = mfpvr();
1160 } else if ((instr & XFX) == 0x7c0002a6) { /* mfspr */
1161 rs = (instr & 0x3e00000) >> 21;
1162 spr = (instr & 0x1ff800) >> 16;
1163 return emulate_mfspr(spr, rs, frame);
1164 } else if ((instr & XFX) == 0x7c0003a6) { /* mtspr */
1165 rs = (instr & 0x3e00000) >> 21;
1166 spr = (instr & 0x1ff800) >> 16;
1167 return emulate_mtspr(spr, rs, frame);
1168 } else if ((instr & 0xfc000ffe) == 0x7c0004ac) { /* various sync */
1169 powerpc_sync(); /* Do a heavy-weight sync */
1176 if (!(pcb->pcb_flags & PCB_FPREGS)) {
1177 bzero(&pcb->pcb_fpu, sizeof(pcb->pcb_fpu));
1178 pcb->pcb_flags |= PCB_FPREGS;
1179 } else if (pcb->pcb_flags & PCB_FPU)
1181 sig = fpu_emulate(frame, &pcb->pcb_fpu);
1182 if ((sig == 0 || sig == SIGFPE) && pcb->pcb_flags & PCB_FPU)
1185 if (sig == SIGILL) {
1186 if (pcb->pcb_lastill != frame->srr0) {
1187 /* Allow a second chance, in case of cache sync issues. */
1189 pmap_sync_icache(PCPU_GET(curpmap), frame->srr0, 4);
1190 pcb->pcb_lastill = frame->srr0;