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;
147 int oonstack, rndfsize;
153 PROC_LOCK_ASSERT(p, MA_OWNED);
156 mtx_assert(&psp->ps_mtx, MA_OWNED);
158 oonstack = sigonstack(tf->fixreg[1]);
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);
181 memset(&sf32, 0, sizeof(sf32));
182 grab_mcontext32(td, &sf32.sf_uc.uc_mcontext, 0);
184 sf32.sf_uc.uc_sigmask = *mask;
185 sf32.sf_uc.uc_stack.ss_sp = (uintptr_t)td->td_sigstk.ss_sp;
186 sf32.sf_uc.uc_stack.ss_size = (uint32_t)td->td_sigstk.ss_size;
187 sf32.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
188 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
190 sf32.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0;
193 sig = ksi->ksi_signo;
194 code = ksi->ksi_code;
196 sfpsize = sizeof(sf);
199 * 64-bit PPC defines a 288 byte scratch region
202 rndfsize = 288 + roundup(sizeof(sf), 48);
204 rndfsize = roundup(sizeof(sf), 16);
211 memset(&sf, 0, sizeof(sf));
212 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
214 sf.sf_uc.uc_sigmask = *mask;
215 sf.sf_uc.uc_stack = td->td_sigstk;
216 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
217 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
219 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0;
220 #ifdef COMPAT_FREEBSD32
224 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
228 * Allocate and validate space for the signal handler context.
230 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
231 SIGISMEMBER(psp->ps_sigonstack, sig)) {
232 usfp = (void *)(((uintptr_t)td->td_sigstk.ss_sp +
233 td->td_sigstk.ss_size - rndfsize) & ~0xFul);
235 usfp = (void *)((tf->fixreg[1] - rndfsize) & ~0xFul);
239 * Save the floating-point state, if necessary, then copy it.
244 * Set up the registers to return to sigcode.
246 * r1/sp - sigframe ptr
247 * lr - sig function, dispatched to by blrl in trampoline
249 * r4 - SIGINFO ? &siginfo : exception code
251 * srr0 - trampoline function addr
253 tf->lr = (register_t)catcher;
254 tf->fixreg[1] = (register_t)usfp;
255 tf->fixreg[FIRSTARG] = sig;
256 #ifdef COMPAT_FREEBSD32
257 tf->fixreg[FIRSTARG+2] = (register_t)usfp +
258 ((SV_PROC_FLAG(p, SV_ILP32)) ?
259 offsetof(struct sigframe32, sf_uc) :
260 offsetof(struct sigframe, sf_uc));
262 tf->fixreg[FIRSTARG+2] = (register_t)usfp +
263 offsetof(struct sigframe, sf_uc);
265 if (SIGISMEMBER(psp->ps_siginfo, sig)) {
267 * Signal handler installed with SA_SIGINFO.
269 #ifdef COMPAT_FREEBSD32
270 if (SV_PROC_FLAG(p, SV_ILP32)) {
271 sf32.sf_si = siginfo32;
272 tf->fixreg[FIRSTARG+1] = (register_t)usfp +
273 offsetof(struct sigframe32, sf_si);
274 sf32.sf_si = siginfo32;
277 tf->fixreg[FIRSTARG+1] = (register_t)usfp +
278 offsetof(struct sigframe, sf_si);
279 sf.sf_si = ksi->ksi_info;
280 #ifdef COMPAT_FREEBSD32
284 /* Old FreeBSD-style arguments. */
285 tf->fixreg[FIRSTARG+1] = code;
286 tf->fixreg[FIRSTARG+3] = (tf->exc == EXC_DSI) ?
289 mtx_unlock(&psp->ps_mtx);
292 tf->srr0 = (register_t)p->p_sysent->sv_sigcode_base;
295 * copy the frame out to userland.
297 if (copyout(sfp, usfp, sfpsize) != 0) {
299 * Process has trashed its stack. Kill it.
301 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp);
306 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td,
307 tf->srr0, tf->fixreg[1]);
310 mtx_lock(&psp->ps_mtx);
314 sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
319 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
321 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
322 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
326 error = set_mcontext(td, &uc.uc_mcontext);
330 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
332 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x",
333 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]);
335 return (EJUSTRETURN);
338 #ifdef COMPAT_FREEBSD4
340 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap)
343 return sys_sigreturn(td, (struct sigreturn_args *)uap);
348 * Construct a PCB from a trapframe. This is called from kdb_trap() where
349 * we want to start a backtrace from the function that caused us to enter
350 * the debugger. We have the context in the trapframe, but base the trace
351 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
352 * enough for a backtrace.
355 makectx(struct trapframe *tf, struct pcb *pcb)
358 pcb->pcb_lr = tf->srr0;
359 pcb->pcb_sp = tf->fixreg[1];
363 * get_mcontext/sendsig helper routine that doesn't touch the
367 grab_mcontext(struct thread *td, mcontext_t *mcp, int flags)
374 memset(mcp, 0, sizeof(mcontext_t));
376 mcp->mc_vers = _MC_VERSION;
378 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe));
379 if (flags & GET_MC_CLEAR_RET) {
385 * This assumes that floating-point context is *not* lazy,
386 * so if the thread has used FP there would have been a
387 * FP-unavailable exception that would have set things up
390 if (pcb->pcb_flags & PCB_FPREGS) {
391 if (pcb->pcb_flags & PCB_FPU) {
392 KASSERT(td == curthread,
393 ("get_mcontext: fp save not curthread"));
398 mcp->mc_flags |= _MC_FP_VALID;
399 memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double));
400 for (i = 0; i < 32; i++)
401 memcpy(&mcp->mc_fpreg[i], &pcb->pcb_fpu.fpr[i].fpr,
405 if (pcb->pcb_flags & PCB_VSX) {
406 for (i = 0; i < 32; i++)
407 memcpy(&mcp->mc_vsxfpreg[i],
408 &pcb->pcb_fpu.fpr[i].vsr[2], sizeof(double));
412 * Repeat for Altivec context
415 if (pcb->pcb_flags & PCB_VEC) {
416 KASSERT(td == curthread,
417 ("get_mcontext: fp save not curthread"));
421 mcp->mc_flags |= _MC_AV_VALID;
422 mcp->mc_vscr = pcb->pcb_vec.vscr;
423 mcp->mc_vrsave = pcb->pcb_vec.vrsave;
424 memcpy(mcp->mc_avec, pcb->pcb_vec.vr, sizeof(mcp->mc_avec));
427 mcp->mc_len = sizeof(*mcp);
433 get_mcontext(struct thread *td, mcontext_t *mcp, int flags)
437 error = grab_mcontext(td, mcp, flags);
439 PROC_LOCK(curthread->td_proc);
440 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]);
441 PROC_UNLOCK(curthread->td_proc);
448 set_mcontext(struct thread *td, mcontext_t *mcp)
451 struct trapframe *tf;
458 if (mcp->mc_vers != _MC_VERSION || mcp->mc_len != sizeof(*mcp))
462 * Don't let the user set privileged MSR bits
464 if ((mcp->mc_srr1 & psl_userstatic) != (tf->srr1 & psl_userstatic)) {
468 /* Copy trapframe, preserving TLS pointer across context change */
469 if (SV_PROC_FLAG(td->td_proc, SV_LP64))
470 tls = tf->fixreg[13];
473 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame));
474 if (SV_PROC_FLAG(td->td_proc, SV_LP64))
475 tf->fixreg[13] = tls;
481 pcb->pcb_flags &= ~PCB_FPU;
483 if (mcp->mc_flags & _MC_FP_VALID) {
484 /* enable_fpu() will happen lazily on a fault */
485 pcb->pcb_flags |= PCB_FPREGS;
486 memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double));
487 bzero(pcb->pcb_fpu.fpr, sizeof(pcb->pcb_fpu.fpr));
488 for (i = 0; i < 32; i++) {
489 memcpy(&pcb->pcb_fpu.fpr[i].fpr, &mcp->mc_fpreg[i],
491 memcpy(&pcb->pcb_fpu.fpr[i].vsr[2],
492 &mcp->mc_vsxfpreg[i], sizeof(double));
496 if (mcp->mc_flags & _MC_AV_VALID) {
497 if ((pcb->pcb_flags & PCB_VEC) != PCB_VEC) {
502 pcb->pcb_vec.vscr = mcp->mc_vscr;
503 pcb->pcb_vec.vrsave = mcp->mc_vrsave;
504 memcpy(pcb->pcb_vec.vr, mcp->mc_avec, sizeof(mcp->mc_avec));
511 * Clean up extra POWER state. Some per-process registers and states are not
512 * managed by the MSR, so must be cleaned up explicitly on thread exit.
514 * Currently this includes:
515 * DSCR -- Data stream control register (PowerISA 2.06+)
516 * FSCR -- Facility Status and Control Register (PowerISA 2.07+)
519 cleanup_power_extras(struct thread *td)
526 pcb_flags = td->td_pcb->pcb_flags;
527 /* Clean up registers not managed by MSR. */
528 if (pcb_flags & PCB_CFSCR)
530 if (pcb_flags & PCB_CDSCR)
535 * Set set up registers on exec.
538 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
540 struct trapframe *tf;
544 bzero(tf, sizeof *tf);
546 tf->fixreg[1] = -roundup(-stack + 48, 16);
548 tf->fixreg[1] = -roundup(-stack + 8, 16);
552 * Set up arguments for _start():
553 * _start(argc, argv, envp, obj, cleanup, ps_strings);
556 * - obj and cleanup are the auxilliary and termination
557 * vectors. They are fixed up by ld.elf_so.
558 * - ps_strings is a NetBSD extention, and will be
559 * ignored by executables which are strictly
560 * compliant with the SVR4 ABI.
563 /* Collect argc from the user stack */
564 argc = fuword((void *)stack);
566 tf->fixreg[3] = argc;
567 tf->fixreg[4] = stack + sizeof(register_t);
568 tf->fixreg[5] = stack + (2 + argc)*sizeof(register_t);
569 tf->fixreg[6] = 0; /* auxillary vector */
570 tf->fixreg[7] = 0; /* termination vector */
571 tf->fixreg[8] = (register_t)imgp->ps_strings; /* NetBSD extension */
573 tf->srr0 = imgp->entry_addr;
575 tf->fixreg[12] = imgp->entry_addr;
577 tf->srr1 = psl_userset | PSL_FE_DFLT;
578 cleanup_power_extras(td);
579 td->td_pcb->pcb_flags = 0;
582 #ifdef COMPAT_FREEBSD32
584 ppc32_setregs(struct thread *td, struct image_params *imgp, u_long stack)
586 struct trapframe *tf;
590 bzero(tf, sizeof *tf);
591 tf->fixreg[1] = -roundup(-stack + 8, 16);
593 argc = fuword32((void *)stack);
595 tf->fixreg[3] = argc;
596 tf->fixreg[4] = stack + sizeof(uint32_t);
597 tf->fixreg[5] = stack + (2 + argc)*sizeof(uint32_t);
598 tf->fixreg[6] = 0; /* auxillary vector */
599 tf->fixreg[7] = 0; /* termination vector */
600 tf->fixreg[8] = (register_t)imgp->ps_strings; /* NetBSD extension */
602 tf->srr0 = imgp->entry_addr;
603 tf->srr1 = psl_userset32 | PSL_FE_DFLT;
604 cleanup_power_extras(td);
605 td->td_pcb->pcb_flags = 0;
610 fill_regs(struct thread *td, struct reg *regs)
612 struct trapframe *tf;
615 memcpy(regs, tf, sizeof(struct reg));
621 fill_dbregs(struct thread *td, struct dbreg *dbregs)
623 /* No debug registers on PowerPC */
628 fill_fpregs(struct thread *td, struct fpreg *fpregs)
635 if ((pcb->pcb_flags & PCB_FPREGS) == 0)
636 memset(fpregs, 0, sizeof(struct fpreg));
638 memcpy(&fpregs->fpscr, &pcb->pcb_fpu.fpscr, sizeof(double));
639 for (i = 0; i < 32; i++)
640 memcpy(&fpregs->fpreg[i], &pcb->pcb_fpu.fpr[i].fpr,
648 set_regs(struct thread *td, struct reg *regs)
650 struct trapframe *tf;
653 memcpy(tf, regs, sizeof(struct reg));
659 set_dbregs(struct thread *td, struct dbreg *dbregs)
661 /* No debug registers on PowerPC */
666 set_fpregs(struct thread *td, struct fpreg *fpregs)
672 pcb->pcb_flags |= PCB_FPREGS;
673 memcpy(&pcb->pcb_fpu.fpscr, &fpregs->fpscr, sizeof(double));
674 for (i = 0; i < 32; i++) {
675 memcpy(&pcb->pcb_fpu.fpr[i].fpr, &fpregs->fpreg[i],
682 #ifdef COMPAT_FREEBSD32
684 set_regs32(struct thread *td, struct reg32 *regs)
686 struct trapframe *tf;
690 for (i = 0; i < 32; i++)
691 tf->fixreg[i] = regs->fixreg[i];
702 fill_regs32(struct thread *td, struct reg32 *regs)
704 struct trapframe *tf;
708 for (i = 0; i < 32; i++)
709 regs->fixreg[i] = tf->fixreg[i];
720 grab_mcontext32(struct thread *td, mcontext32_t *mcp, int flags)
725 error = grab_mcontext(td, &mcp64, flags);
729 mcp->mc_vers = mcp64.mc_vers;
730 mcp->mc_flags = mcp64.mc_flags;
731 mcp->mc_onstack = mcp64.mc_onstack;
732 mcp->mc_len = mcp64.mc_len;
733 memcpy(mcp->mc_avec,mcp64.mc_avec,sizeof(mcp64.mc_avec));
734 memcpy(mcp->mc_av,mcp64.mc_av,sizeof(mcp64.mc_av));
735 for (i = 0; i < 42; i++)
736 mcp->mc_frame[i] = mcp64.mc_frame[i];
737 memcpy(mcp->mc_fpreg,mcp64.mc_fpreg,sizeof(mcp64.mc_fpreg));
738 memcpy(mcp->mc_vsxfpreg,mcp64.mc_vsxfpreg,sizeof(mcp64.mc_vsxfpreg));
744 get_mcontext32(struct thread *td, mcontext32_t *mcp, int flags)
748 error = grab_mcontext32(td, mcp, flags);
750 PROC_LOCK(curthread->td_proc);
751 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]);
752 PROC_UNLOCK(curthread->td_proc);
759 set_mcontext32(struct thread *td, mcontext32_t *mcp)
764 mcp64.mc_vers = mcp->mc_vers;
765 mcp64.mc_flags = mcp->mc_flags;
766 mcp64.mc_onstack = mcp->mc_onstack;
767 mcp64.mc_len = mcp->mc_len;
768 memcpy(mcp64.mc_avec,mcp->mc_avec,sizeof(mcp64.mc_avec));
769 memcpy(mcp64.mc_av,mcp->mc_av,sizeof(mcp64.mc_av));
770 for (i = 0; i < 42; i++)
771 mcp64.mc_frame[i] = mcp->mc_frame[i];
772 mcp64.mc_srr1 |= (td->td_frame->srr1 & 0xFFFFFFFF00000000ULL);
773 memcpy(mcp64.mc_fpreg,mcp->mc_fpreg,sizeof(mcp64.mc_fpreg));
774 memcpy(mcp64.mc_vsxfpreg,mcp->mc_vsxfpreg,sizeof(mcp64.mc_vsxfpreg));
776 error = set_mcontext(td, &mcp64);
782 #ifdef COMPAT_FREEBSD32
784 freebsd32_sigreturn(struct thread *td, struct freebsd32_sigreturn_args *uap)
789 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
791 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
792 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
796 error = set_mcontext32(td, &uc.uc_mcontext);
800 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
802 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x",
803 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]);
805 return (EJUSTRETURN);
809 * The first two fields of a ucontext_t are the signal mask and the machine
810 * context. The next field is uc_link; we want to avoid destroying the link
811 * when copying out contexts.
813 #define UC32_COPY_SIZE offsetof(ucontext32_t, uc_link)
816 freebsd32_getcontext(struct thread *td, struct freebsd32_getcontext_args *uap)
821 if (uap->ucp == NULL)
824 bzero(&uc, sizeof(uc));
825 get_mcontext32(td, &uc.uc_mcontext, GET_MC_CLEAR_RET);
826 PROC_LOCK(td->td_proc);
827 uc.uc_sigmask = td->td_sigmask;
828 PROC_UNLOCK(td->td_proc);
829 ret = copyout(&uc, uap->ucp, UC32_COPY_SIZE);
835 freebsd32_setcontext(struct thread *td, struct freebsd32_setcontext_args *uap)
840 if (uap->ucp == NULL)
843 ret = copyin(uap->ucp, &uc, UC32_COPY_SIZE);
845 ret = set_mcontext32(td, &uc.uc_mcontext);
847 kern_sigprocmask(td, SIG_SETMASK,
848 &uc.uc_sigmask, NULL, 0);
852 return (ret == 0 ? EJUSTRETURN : ret);
856 freebsd32_swapcontext(struct thread *td, struct freebsd32_swapcontext_args *uap)
861 if (uap->oucp == NULL || uap->ucp == NULL)
864 bzero(&uc, sizeof(uc));
865 get_mcontext32(td, &uc.uc_mcontext, GET_MC_CLEAR_RET);
866 PROC_LOCK(td->td_proc);
867 uc.uc_sigmask = td->td_sigmask;
868 PROC_UNLOCK(td->td_proc);
869 ret = copyout(&uc, uap->oucp, UC32_COPY_SIZE);
871 ret = copyin(uap->ucp, &uc, UC32_COPY_SIZE);
873 ret = set_mcontext32(td, &uc.uc_mcontext);
875 kern_sigprocmask(td, SIG_SETMASK,
876 &uc.uc_sigmask, NULL, 0);
881 return (ret == 0 ? EJUSTRETURN : ret);
887 cpu_set_syscall_retval(struct thread *td, int error)
890 struct trapframe *tf;
893 if (error == EJUSTRETURN)
899 if (tf->fixreg[0] == SYS___syscall &&
900 (SV_PROC_FLAG(p, SV_ILP32))) {
901 int code = tf->fixreg[FIRSTARG + 1];
903 #if defined(COMPAT_FREEBSD6) && defined(SYS_freebsd6_lseek)
904 code != SYS_freebsd6_lseek &&
906 code != SYS_lseek) ? 1 : 0;
914 * 64-bit return, 32-bit syscall. Fixup byte order
916 tf->fixreg[FIRSTARG] = 0;
917 tf->fixreg[FIRSTARG + 1] = td->td_retval[0];
919 tf->fixreg[FIRSTARG] = td->td_retval[0];
920 tf->fixreg[FIRSTARG + 1] = td->td_retval[1];
922 tf->cr &= ~0x10000000; /* Unset summary overflow */
926 * Set user's pc back to redo the system call.
931 tf->fixreg[FIRSTARG] = SV_ABI_ERRNO(p, error);
932 tf->cr |= 0x10000000; /* Set summary overflow */
938 * Threading functions
941 cpu_thread_exit(struct thread *td)
943 cleanup_power_extras(td);
947 cpu_thread_clean(struct thread *td)
952 cpu_thread_alloc(struct thread *td)
956 pcb = (struct pcb *)((td->td_kstack + td->td_kstack_pages * PAGE_SIZE -
957 sizeof(struct pcb)) & ~0x2fUL);
959 td->td_frame = (struct trapframe *)pcb - 1;
963 cpu_thread_free(struct thread *td)
968 cpu_set_user_tls(struct thread *td, void *tls_base)
971 if (SV_PROC_FLAG(td->td_proc, SV_LP64))
972 td->td_frame->fixreg[13] = (register_t)tls_base + 0x7010;
974 td->td_frame->fixreg[2] = (register_t)tls_base + 0x7008;
979 cpu_copy_thread(struct thread *td, struct thread *td0)
982 struct trapframe *tf;
983 struct callframe *cf;
987 /* Copy the upcall pcb */
988 bcopy(td0->td_pcb, pcb2, sizeof(*pcb2));
990 /* Create a stack for the new thread */
992 bcopy(td0->td_frame, tf, sizeof(struct trapframe));
993 tf->fixreg[FIRSTARG] = 0;
994 tf->fixreg[FIRSTARG + 1] = 0;
995 tf->cr &= ~0x10000000;
997 /* Set registers for trampoline to user mode. */
998 cf = (struct callframe *)tf - 1;
999 memset(cf, 0, sizeof(struct callframe));
1000 cf->cf_func = (register_t)fork_return;
1001 cf->cf_arg0 = (register_t)td;
1002 cf->cf_arg1 = (register_t)tf;
1004 pcb2->pcb_sp = (register_t)cf;
1005 #if defined(__powerpc64__) && (!defined(_CALL_ELF) || _CALL_ELF == 1)
1006 pcb2->pcb_lr = ((register_t *)fork_trampoline)[0];
1007 pcb2->pcb_toc = ((register_t *)fork_trampoline)[1];
1009 pcb2->pcb_lr = (register_t)fork_trampoline;
1010 pcb2->pcb_context[0] = pcb2->pcb_lr;
1012 pcb2->pcb_cpu.aim.usr_vsid = 0;
1014 pcb2->pcb_vec.vscr = SPEFSCR_FINVE | SPEFSCR_FDBZE |
1015 SPEFSCR_FUNFE | SPEFSCR_FOVFE;
1018 /* Setup to release spin count in fork_exit(). */
1019 td->td_md.md_spinlock_count = 1;
1020 td->td_md.md_saved_msr = psl_kernset;
1024 cpu_set_upcall(struct thread *td, void (*entry)(void *), void *arg,
1027 struct trapframe *tf;
1031 /* align stack and alloc space for frame ptr and saved LR */
1032 #ifdef __powerpc64__
1033 sp = ((uintptr_t)stack->ss_sp + stack->ss_size - 48) &
1036 sp = ((uintptr_t)stack->ss_sp + stack->ss_size - 8) &
1039 bzero(tf, sizeof(struct trapframe));
1041 tf->fixreg[1] = (register_t)sp;
1042 tf->fixreg[3] = (register_t)arg;
1043 if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) {
1044 tf->srr0 = (register_t)entry;
1045 #ifdef __powerpc64__
1046 tf->srr1 = psl_userset32 | PSL_FE_DFLT;
1048 tf->srr1 = psl_userset | PSL_FE_DFLT;
1051 #ifdef __powerpc64__
1052 if (td->td_proc->p_sysent == &elf64_freebsd_sysvec_v2) {
1053 tf->srr0 = (register_t)entry;
1054 /* ELFv2 ABI requires that the global entry point be in r12. */
1055 tf->fixreg[12] = (register_t)entry;
1058 register_t entry_desc[3];
1059 (void)copyin((void *)entry, entry_desc, sizeof(entry_desc));
1060 tf->srr0 = entry_desc[0];
1061 tf->fixreg[2] = entry_desc[1];
1062 tf->fixreg[11] = entry_desc[2];
1064 tf->srr1 = psl_userset | PSL_FE_DFLT;
1068 td->td_pcb->pcb_flags = 0;
1070 td->td_pcb->pcb_vec.vscr = SPEFSCR_FINVE | SPEFSCR_FDBZE |
1071 SPEFSCR_FUNFE | SPEFSCR_FOVFE;
1074 td->td_retval[0] = (register_t)entry;
1075 td->td_retval[1] = 0;
1079 emulate_mfspr(int spr, int reg, struct trapframe *frame){
1084 if (spr == SPR_DSCR || spr == SPR_DSCRP) {
1085 // If DSCR was never set, get the default DSCR
1086 if ((td->td_pcb->pcb_flags & PCB_CDSCR) == 0)
1087 td->td_pcb->pcb_dscr = mfspr(SPR_DSCRP);
1089 frame->fixreg[reg] = td->td_pcb->pcb_dscr;
1097 emulate_mtspr(int spr, int reg, struct trapframe *frame){
1102 if (spr == SPR_DSCR || spr == SPR_DSCRP) {
1103 td->td_pcb->pcb_flags |= PCB_CDSCR;
1104 td->td_pcb->pcb_dscr = frame->fixreg[reg];
1105 mtspr(SPR_DSCRP, frame->fixreg[reg]);
1112 #define XFX 0xFC0007FF
1114 ppc_instr_emulate(struct trapframe *frame, struct thread *td)
1121 instr = fuword32((void *)frame->srr0);
1124 if ((instr & 0xfc1fffff) == 0x7c1f42a6) { /* mfpvr */
1125 reg = (instr & ~0xfc1fffff) >> 21;
1126 frame->fixreg[reg] = mfpvr();
1129 } else if ((instr & XFX) == 0x7c0002a6) { /* mfspr */
1130 rs = (instr & 0x3e00000) >> 21;
1131 spr = (instr & 0x1ff800) >> 16;
1132 return emulate_mfspr(spr, rs, frame);
1133 } else if ((instr & XFX) == 0x7c0003a6) { /* mtspr */
1134 rs = (instr & 0x3e00000) >> 21;
1135 spr = (instr & 0x1ff800) >> 16;
1136 return emulate_mtspr(spr, rs, frame);
1137 } else if ((instr & 0xfc000ffe) == 0x7c0004ac) { /* various sync */
1138 powerpc_sync(); /* Do a heavy-weight sync */
1145 if (!(pcb->pcb_flags & PCB_FPREGS)) {
1146 bzero(&pcb->pcb_fpu, sizeof(pcb->pcb_fpu));
1147 pcb->pcb_flags |= PCB_FPREGS;
1148 } else if (pcb->pcb_flags & PCB_FPU)
1150 sig = fpu_emulate(frame, &pcb->pcb_fpu);
1151 if ((sig == 0 || sig == SIGFPE) && pcb->pcb_flags & PCB_FPU)
1154 if (sig == SIGILL) {
1155 if (pcb->pcb_lastill != frame->srr0) {
1156 /* Allow a second chance, in case of cache sync issues. */
1158 pmap_sync_icache(PCPU_GET(curpmap), frame->srr0, 4);
1159 pcb->pcb_lastill = frame->srr0;