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_compat.h"
63 #include "opt_fpu_emu.h"
65 #include <sys/param.h>
67 #include <sys/systm.h>
74 #include <sys/imgact.h>
75 #include <sys/kernel.h>
78 #include <sys/malloc.h>
79 #include <sys/mutex.h>
80 #include <sys/signalvar.h>
81 #include <sys/syscallsubr.h>
82 #include <sys/syscall.h>
83 #include <sys/sysent.h>
84 #include <sys/sysproto.h>
85 #include <sys/ucontext.h>
88 #include <machine/altivec.h>
89 #include <machine/cpu.h>
90 #include <machine/elf.h>
91 #include <machine/fpu.h>
92 #include <machine/pcb.h>
93 #include <machine/reg.h>
94 #include <machine/sigframe.h>
95 #include <machine/trap.h>
96 #include <machine/vmparam.h>
99 #include <powerpc/fpu/fpu_extern.h>
102 #ifdef COMPAT_FREEBSD32
103 #include <compat/freebsd32/freebsd32_signal.h>
104 #include <compat/freebsd32/freebsd32_util.h>
105 #include <compat/freebsd32/freebsd32_proto.h>
107 typedef struct __ucontext32 {
109 mcontext32_t uc_mcontext;
111 struct sigaltstack32 uc_stack;
113 uint32_t __spare__[4];
118 struct siginfo32 sf_si;
121 static int grab_mcontext32(struct thread *td, mcontext32_t *, int flags);
124 static int grab_mcontext(struct thread *, mcontext_t *, int);
127 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
129 struct trapframe *tf;
134 #ifdef COMPAT_FREEBSD32
135 struct siginfo32 siginfo32;
136 struct sigframe32 sf32;
140 int oonstack, rndfsize;
146 PROC_LOCK_ASSERT(p, MA_OWNED);
149 mtx_assert(&psp->ps_mtx, MA_OWNED);
151 oonstack = sigonstack(tf->fixreg[1]);
154 * Fill siginfo structure.
156 ksi->ksi_info.si_signo = ksi->ksi_signo;
157 ksi->ksi_info.si_addr =
158 (void *)((tf->exc == EXC_DSI || tf->exc == EXC_DSE) ?
161 #ifdef COMPAT_FREEBSD32
162 if (SV_PROC_FLAG(p, SV_ILP32)) {
163 siginfo_to_siginfo32(&ksi->ksi_info, &siginfo32);
164 sig = siginfo32.si_signo;
165 code = siginfo32.si_code;
166 sfp = (caddr_t)&sf32;
167 sfpsize = sizeof(sf32);
168 rndfsize = roundup(sizeof(sf32), 16);
174 memset(&sf32, 0, sizeof(sf32));
175 grab_mcontext32(td, &sf32.sf_uc.uc_mcontext, 0);
177 sf32.sf_uc.uc_sigmask = *mask;
178 sf32.sf_uc.uc_stack.ss_sp = (uintptr_t)td->td_sigstk.ss_sp;
179 sf32.sf_uc.uc_stack.ss_size = (uint32_t)td->td_sigstk.ss_size;
180 sf32.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
181 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
183 sf32.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0;
186 sig = ksi->ksi_signo;
187 code = ksi->ksi_code;
189 sfpsize = sizeof(sf);
192 * 64-bit PPC defines a 288 byte scratch region
195 rndfsize = 288 + roundup(sizeof(sf), 48);
197 rndfsize = roundup(sizeof(sf), 16);
204 memset(&sf, 0, sizeof(sf));
205 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
207 sf.sf_uc.uc_sigmask = *mask;
208 sf.sf_uc.uc_stack = td->td_sigstk;
209 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
210 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
212 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0;
213 #ifdef COMPAT_FREEBSD32
217 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
221 * Allocate and validate space for the signal handler context.
223 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
224 SIGISMEMBER(psp->ps_sigonstack, sig)) {
225 usfp = (void *)(((uintptr_t)td->td_sigstk.ss_sp +
226 td->td_sigstk.ss_size - rndfsize) & ~0xFul);
228 usfp = (void *)((tf->fixreg[1] - rndfsize) & ~0xFul);
232 * Save the floating-point state, if necessary, then copy it.
237 * Set up the registers to return to sigcode.
239 * r1/sp - sigframe ptr
240 * lr - sig function, dispatched to by blrl in trampoline
242 * r4 - SIGINFO ? &siginfo : exception code
244 * srr0 - trampoline function addr
246 tf->lr = (register_t)catcher;
247 tf->fixreg[1] = (register_t)usfp;
248 tf->fixreg[FIRSTARG] = sig;
249 #ifdef COMPAT_FREEBSD32
250 tf->fixreg[FIRSTARG+2] = (register_t)usfp +
251 ((SV_PROC_FLAG(p, SV_ILP32)) ?
252 offsetof(struct sigframe32, sf_uc) :
253 offsetof(struct sigframe, sf_uc));
255 tf->fixreg[FIRSTARG+2] = (register_t)usfp +
256 offsetof(struct sigframe, sf_uc);
258 if (SIGISMEMBER(psp->ps_siginfo, sig)) {
260 * Signal handler installed with SA_SIGINFO.
262 #ifdef COMPAT_FREEBSD32
263 if (SV_PROC_FLAG(p, SV_ILP32)) {
264 sf32.sf_si = siginfo32;
265 tf->fixreg[FIRSTARG+1] = (register_t)usfp +
266 offsetof(struct sigframe32, sf_si);
267 sf32.sf_si = siginfo32;
270 tf->fixreg[FIRSTARG+1] = (register_t)usfp +
271 offsetof(struct sigframe, sf_si);
272 sf.sf_si = ksi->ksi_info;
273 #ifdef COMPAT_FREEBSD32
277 /* Old FreeBSD-style arguments. */
278 tf->fixreg[FIRSTARG+1] = code;
279 tf->fixreg[FIRSTARG+3] = (tf->exc == EXC_DSI) ?
282 mtx_unlock(&psp->ps_mtx);
285 tf->srr0 = (register_t)p->p_sysent->sv_sigcode_base;
288 * copy the frame out to userland.
290 if (copyout(sfp, usfp, sfpsize) != 0) {
292 * Process has trashed its stack. Kill it.
294 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp);
299 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td,
300 tf->srr0, tf->fixreg[1]);
303 mtx_lock(&psp->ps_mtx);
307 sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
312 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
314 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
315 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
319 error = set_mcontext(td, &uc.uc_mcontext);
323 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
325 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x",
326 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]);
328 return (EJUSTRETURN);
331 #ifdef COMPAT_FREEBSD4
333 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap)
336 return sys_sigreturn(td, (struct sigreturn_args *)uap);
341 * Construct a PCB from a trapframe. This is called from kdb_trap() where
342 * we want to start a backtrace from the function that caused us to enter
343 * the debugger. We have the context in the trapframe, but base the trace
344 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
345 * enough for a backtrace.
348 makectx(struct trapframe *tf, struct pcb *pcb)
351 pcb->pcb_lr = tf->srr0;
352 pcb->pcb_sp = tf->fixreg[1];
356 * get_mcontext/sendsig helper routine that doesn't touch the
360 grab_mcontext(struct thread *td, mcontext_t *mcp, int flags)
367 memset(mcp, 0, sizeof(mcontext_t));
369 mcp->mc_vers = _MC_VERSION;
371 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe));
372 if (flags & GET_MC_CLEAR_RET) {
378 * This assumes that floating-point context is *not* lazy,
379 * so if the thread has used FP there would have been a
380 * FP-unavailable exception that would have set things up
383 if (pcb->pcb_flags & PCB_FPREGS) {
384 if (pcb->pcb_flags & PCB_FPU) {
385 KASSERT(td == curthread,
386 ("get_mcontext: fp save not curthread"));
391 mcp->mc_flags |= _MC_FP_VALID;
392 memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double));
393 for (i = 0; i < 32; i++)
394 memcpy(&mcp->mc_fpreg[i], &pcb->pcb_fpu.fpr[i].fpr,
398 if (pcb->pcb_flags & PCB_VSX) {
399 for (i = 0; i < 32; i++)
400 memcpy(&mcp->mc_vsxfpreg[i],
401 &pcb->pcb_fpu.fpr[i].vsr[2], sizeof(double));
405 * Repeat for Altivec context
408 if (pcb->pcb_flags & PCB_VEC) {
409 KASSERT(td == curthread,
410 ("get_mcontext: fp save not curthread"));
414 mcp->mc_flags |= _MC_AV_VALID;
415 mcp->mc_vscr = pcb->pcb_vec.vscr;
416 mcp->mc_vrsave = pcb->pcb_vec.vrsave;
417 memcpy(mcp->mc_avec, pcb->pcb_vec.vr, sizeof(mcp->mc_avec));
420 mcp->mc_len = sizeof(*mcp);
426 get_mcontext(struct thread *td, mcontext_t *mcp, int flags)
430 error = grab_mcontext(td, mcp, flags);
432 PROC_LOCK(curthread->td_proc);
433 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]);
434 PROC_UNLOCK(curthread->td_proc);
441 set_mcontext(struct thread *td, mcontext_t *mcp)
444 struct trapframe *tf;
451 if (mcp->mc_vers != _MC_VERSION || mcp->mc_len != sizeof(*mcp))
455 * Don't let the user set privileged MSR bits
457 if ((mcp->mc_srr1 & psl_userstatic) != (tf->srr1 & psl_userstatic)) {
461 /* Copy trapframe, preserving TLS pointer across context change */
462 if (SV_PROC_FLAG(td->td_proc, SV_LP64))
463 tls = tf->fixreg[13];
466 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame));
467 if (SV_PROC_FLAG(td->td_proc, SV_LP64))
468 tf->fixreg[13] = tls;
472 if (mcp->mc_flags & _MC_FP_VALID) {
473 /* enable_fpu() will happen lazily on a fault */
474 pcb->pcb_flags |= PCB_FPREGS;
475 memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double));
476 bzero(pcb->pcb_fpu.fpr, sizeof(pcb->pcb_fpu.fpr));
477 for (i = 0; i < 32; i++) {
478 memcpy(&pcb->pcb_fpu.fpr[i].fpr, &mcp->mc_fpreg[i],
480 memcpy(&pcb->pcb_fpu.fpr[i].vsr[2],
481 &mcp->mc_vsxfpreg[i], sizeof(double));
485 if (mcp->mc_flags & _MC_AV_VALID) {
486 if ((pcb->pcb_flags & PCB_VEC) != PCB_VEC) {
491 pcb->pcb_vec.vscr = mcp->mc_vscr;
492 pcb->pcb_vec.vrsave = mcp->mc_vrsave;
493 memcpy(pcb->pcb_vec.vr, mcp->mc_avec, sizeof(mcp->mc_avec));
500 * Set set up registers on exec.
503 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
505 struct trapframe *tf;
509 bzero(tf, sizeof *tf);
511 tf->fixreg[1] = -roundup(-stack + 48, 16);
513 tf->fixreg[1] = -roundup(-stack + 8, 16);
517 * Set up arguments for _start():
518 * _start(argc, argv, envp, obj, cleanup, ps_strings);
521 * - obj and cleanup are the auxilliary and termination
522 * vectors. They are fixed up by ld.elf_so.
523 * - ps_strings is a NetBSD extention, and will be
524 * ignored by executables which are strictly
525 * compliant with the SVR4 ABI.
528 /* Collect argc from the user stack */
529 argc = fuword((void *)stack);
531 tf->fixreg[3] = argc;
532 tf->fixreg[4] = stack + sizeof(register_t);
533 tf->fixreg[5] = stack + (2 + argc)*sizeof(register_t);
534 tf->fixreg[6] = 0; /* auxillary vector */
535 tf->fixreg[7] = 0; /* termination vector */
536 tf->fixreg[8] = (register_t)imgp->ps_strings; /* NetBSD extension */
538 tf->srr0 = imgp->entry_addr;
540 tf->fixreg[12] = imgp->entry_addr;
542 tf->srr1 = psl_userset | PSL_FE_DFLT;
543 td->td_pcb->pcb_flags = 0;
546 #ifdef COMPAT_FREEBSD32
548 ppc32_setregs(struct thread *td, struct image_params *imgp, u_long stack)
550 struct trapframe *tf;
554 bzero(tf, sizeof *tf);
555 tf->fixreg[1] = -roundup(-stack + 8, 16);
557 argc = fuword32((void *)stack);
559 tf->fixreg[3] = argc;
560 tf->fixreg[4] = stack + sizeof(uint32_t);
561 tf->fixreg[5] = stack + (2 + argc)*sizeof(uint32_t);
562 tf->fixreg[6] = 0; /* auxillary vector */
563 tf->fixreg[7] = 0; /* termination vector */
564 tf->fixreg[8] = (register_t)imgp->ps_strings; /* NetBSD extension */
566 tf->srr0 = imgp->entry_addr;
567 tf->srr1 = psl_userset32 | PSL_FE_DFLT;
568 td->td_pcb->pcb_flags = 0;
573 fill_regs(struct thread *td, struct reg *regs)
575 struct trapframe *tf;
578 memcpy(regs, tf, sizeof(struct reg));
584 fill_dbregs(struct thread *td, struct dbreg *dbregs)
586 /* No debug registers on PowerPC */
591 fill_fpregs(struct thread *td, struct fpreg *fpregs)
598 if ((pcb->pcb_flags & PCB_FPREGS) == 0)
599 memset(fpregs, 0, sizeof(struct fpreg));
601 memcpy(&fpregs->fpscr, &pcb->pcb_fpu.fpscr, sizeof(double));
602 for (i = 0; i < 32; i++)
603 memcpy(&fpregs->fpreg[i], &pcb->pcb_fpu.fpr[i].fpr,
611 set_regs(struct thread *td, struct reg *regs)
613 struct trapframe *tf;
616 memcpy(tf, regs, sizeof(struct reg));
622 set_dbregs(struct thread *td, struct dbreg *dbregs)
624 /* No debug registers on PowerPC */
629 set_fpregs(struct thread *td, struct fpreg *fpregs)
635 pcb->pcb_flags |= PCB_FPREGS;
636 memcpy(&pcb->pcb_fpu.fpscr, &fpregs->fpscr, sizeof(double));
637 for (i = 0; i < 32; i++) {
638 memcpy(&pcb->pcb_fpu.fpr[i].fpr, &fpregs->fpreg[i],
645 #ifdef COMPAT_FREEBSD32
647 set_regs32(struct thread *td, struct reg32 *regs)
649 struct trapframe *tf;
653 for (i = 0; i < 32; i++)
654 tf->fixreg[i] = regs->fixreg[i];
665 fill_regs32(struct thread *td, struct reg32 *regs)
667 struct trapframe *tf;
671 for (i = 0; i < 32; i++)
672 regs->fixreg[i] = tf->fixreg[i];
683 grab_mcontext32(struct thread *td, mcontext32_t *mcp, int flags)
688 error = grab_mcontext(td, &mcp64, flags);
692 mcp->mc_vers = mcp64.mc_vers;
693 mcp->mc_flags = mcp64.mc_flags;
694 mcp->mc_onstack = mcp64.mc_onstack;
695 mcp->mc_len = mcp64.mc_len;
696 memcpy(mcp->mc_avec,mcp64.mc_avec,sizeof(mcp64.mc_avec));
697 memcpy(mcp->mc_av,mcp64.mc_av,sizeof(mcp64.mc_av));
698 for (i = 0; i < 42; i++)
699 mcp->mc_frame[i] = mcp64.mc_frame[i];
700 memcpy(mcp->mc_fpreg,mcp64.mc_fpreg,sizeof(mcp64.mc_fpreg));
701 memcpy(mcp->mc_vsxfpreg,mcp64.mc_vsxfpreg,sizeof(mcp64.mc_vsxfpreg));
707 get_mcontext32(struct thread *td, mcontext32_t *mcp, int flags)
711 error = grab_mcontext32(td, mcp, flags);
713 PROC_LOCK(curthread->td_proc);
714 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]);
715 PROC_UNLOCK(curthread->td_proc);
722 set_mcontext32(struct thread *td, mcontext32_t *mcp)
727 mcp64.mc_vers = mcp->mc_vers;
728 mcp64.mc_flags = mcp->mc_flags;
729 mcp64.mc_onstack = mcp->mc_onstack;
730 mcp64.mc_len = mcp->mc_len;
731 memcpy(mcp64.mc_avec,mcp->mc_avec,sizeof(mcp64.mc_avec));
732 memcpy(mcp64.mc_av,mcp->mc_av,sizeof(mcp64.mc_av));
733 for (i = 0; i < 42; i++)
734 mcp64.mc_frame[i] = mcp->mc_frame[i];
735 mcp64.mc_srr1 |= (td->td_frame->srr1 & 0xFFFFFFFF00000000ULL);
736 memcpy(mcp64.mc_fpreg,mcp->mc_fpreg,sizeof(mcp64.mc_fpreg));
737 memcpy(mcp64.mc_vsxfpreg,mcp->mc_vsxfpreg,sizeof(mcp64.mc_vsxfpreg));
739 error = set_mcontext(td, &mcp64);
745 #ifdef COMPAT_FREEBSD32
747 freebsd32_sigreturn(struct thread *td, struct freebsd32_sigreturn_args *uap)
752 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
754 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
755 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
759 error = set_mcontext32(td, &uc.uc_mcontext);
763 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
765 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x",
766 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]);
768 return (EJUSTRETURN);
772 * The first two fields of a ucontext_t are the signal mask and the machine
773 * context. The next field is uc_link; we want to avoid destroying the link
774 * when copying out contexts.
776 #define UC32_COPY_SIZE offsetof(ucontext32_t, uc_link)
779 freebsd32_getcontext(struct thread *td, struct freebsd32_getcontext_args *uap)
784 if (uap->ucp == NULL)
787 get_mcontext32(td, &uc.uc_mcontext, GET_MC_CLEAR_RET);
788 PROC_LOCK(td->td_proc);
789 uc.uc_sigmask = td->td_sigmask;
790 PROC_UNLOCK(td->td_proc);
791 ret = copyout(&uc, uap->ucp, UC32_COPY_SIZE);
797 freebsd32_setcontext(struct thread *td, struct freebsd32_setcontext_args *uap)
802 if (uap->ucp == NULL)
805 ret = copyin(uap->ucp, &uc, UC32_COPY_SIZE);
807 ret = set_mcontext32(td, &uc.uc_mcontext);
809 kern_sigprocmask(td, SIG_SETMASK,
810 &uc.uc_sigmask, NULL, 0);
814 return (ret == 0 ? EJUSTRETURN : ret);
818 freebsd32_swapcontext(struct thread *td, struct freebsd32_swapcontext_args *uap)
823 if (uap->oucp == NULL || uap->ucp == NULL)
826 get_mcontext32(td, &uc.uc_mcontext, GET_MC_CLEAR_RET);
827 PROC_LOCK(td->td_proc);
828 uc.uc_sigmask = td->td_sigmask;
829 PROC_UNLOCK(td->td_proc);
830 ret = copyout(&uc, uap->oucp, UC32_COPY_SIZE);
832 ret = copyin(uap->ucp, &uc, UC32_COPY_SIZE);
834 ret = set_mcontext32(td, &uc.uc_mcontext);
836 kern_sigprocmask(td, SIG_SETMASK,
837 &uc.uc_sigmask, NULL, 0);
842 return (ret == 0 ? EJUSTRETURN : ret);
848 cpu_set_syscall_retval(struct thread *td, int error)
851 struct trapframe *tf;
854 if (error == EJUSTRETURN)
860 if (tf->fixreg[0] == SYS___syscall &&
861 (SV_PROC_FLAG(p, SV_ILP32))) {
862 int code = tf->fixreg[FIRSTARG + 1];
863 if (p->p_sysent->sv_mask)
864 code &= p->p_sysent->sv_mask;
866 #if defined(COMPAT_FREEBSD6) && defined(SYS_freebsd6_lseek)
867 code != SYS_freebsd6_lseek &&
869 code != SYS_lseek) ? 1 : 0;
877 * 64-bit return, 32-bit syscall. Fixup byte order
879 tf->fixreg[FIRSTARG] = 0;
880 tf->fixreg[FIRSTARG + 1] = td->td_retval[0];
882 tf->fixreg[FIRSTARG] = td->td_retval[0];
883 tf->fixreg[FIRSTARG + 1] = td->td_retval[1];
885 tf->cr &= ~0x10000000; /* Unset summary overflow */
889 * Set user's pc back to redo the system call.
894 tf->fixreg[FIRSTARG] = SV_ABI_ERRNO(p, error);
895 tf->cr |= 0x10000000; /* Set summary overflow */
901 * Threading functions
904 cpu_thread_exit(struct thread *td)
909 cpu_thread_clean(struct thread *td)
914 cpu_thread_alloc(struct thread *td)
918 pcb = (struct pcb *)((td->td_kstack + td->td_kstack_pages * PAGE_SIZE -
919 sizeof(struct pcb)) & ~0x2fUL);
921 td->td_frame = (struct trapframe *)pcb - 1;
925 cpu_thread_free(struct thread *td)
930 cpu_set_user_tls(struct thread *td, void *tls_base)
933 if (SV_PROC_FLAG(td->td_proc, SV_LP64))
934 td->td_frame->fixreg[13] = (register_t)tls_base + 0x7010;
936 td->td_frame->fixreg[2] = (register_t)tls_base + 0x7008;
941 cpu_copy_thread(struct thread *td, struct thread *td0)
944 struct trapframe *tf;
945 struct callframe *cf;
949 /* Copy the upcall pcb */
950 bcopy(td0->td_pcb, pcb2, sizeof(*pcb2));
952 /* Create a stack for the new thread */
954 bcopy(td0->td_frame, tf, sizeof(struct trapframe));
955 tf->fixreg[FIRSTARG] = 0;
956 tf->fixreg[FIRSTARG + 1] = 0;
957 tf->cr &= ~0x10000000;
959 /* Set registers for trampoline to user mode. */
960 cf = (struct callframe *)tf - 1;
961 memset(cf, 0, sizeof(struct callframe));
962 cf->cf_func = (register_t)fork_return;
963 cf->cf_arg0 = (register_t)td;
964 cf->cf_arg1 = (register_t)tf;
966 pcb2->pcb_sp = (register_t)cf;
967 #if defined(__powerpc64__) && (!defined(_CALL_ELF) || _CALL_ELF == 1)
968 pcb2->pcb_lr = ((register_t *)fork_trampoline)[0];
969 pcb2->pcb_toc = ((register_t *)fork_trampoline)[1];
971 pcb2->pcb_lr = (register_t)fork_trampoline;
972 pcb2->pcb_context[0] = pcb2->pcb_lr;
974 pcb2->pcb_cpu.aim.usr_vsid = 0;
976 /* Setup to release spin count in fork_exit(). */
977 td->td_md.md_spinlock_count = 1;
978 td->td_md.md_saved_msr = psl_kernset;
982 cpu_set_upcall(struct thread *td, void (*entry)(void *), void *arg,
985 struct trapframe *tf;
989 /* align stack and alloc space for frame ptr and saved LR */
991 sp = ((uintptr_t)stack->ss_sp + stack->ss_size - 48) &
994 sp = ((uintptr_t)stack->ss_sp + stack->ss_size - 8) &
997 bzero(tf, sizeof(struct trapframe));
999 tf->fixreg[1] = (register_t)sp;
1000 tf->fixreg[3] = (register_t)arg;
1001 if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) {
1002 tf->srr0 = (register_t)entry;
1003 #ifdef __powerpc64__
1004 tf->srr1 = psl_userset32 | PSL_FE_DFLT;
1006 tf->srr1 = psl_userset | PSL_FE_DFLT;
1009 #ifdef __powerpc64__
1010 register_t entry_desc[3];
1011 (void)copyin((void *)entry, entry_desc, sizeof(entry_desc));
1012 tf->srr0 = entry_desc[0];
1013 tf->fixreg[2] = entry_desc[1];
1014 tf->fixreg[11] = entry_desc[2];
1015 tf->srr1 = psl_userset | PSL_FE_DFLT;
1019 td->td_pcb->pcb_flags = 0;
1021 td->td_retval[0] = (register_t)entry;
1022 td->td_retval[1] = 0;
1026 ppc_instr_emulate(struct trapframe *frame, struct pcb *pcb)
1031 instr = fuword32((void *)frame->srr0);
1034 if ((instr & 0xfc1fffff) == 0x7c1f42a6) { /* mfpvr */
1035 reg = (instr & ~0xfc1fffff) >> 21;
1036 frame->fixreg[reg] = mfpvr();
1041 if ((instr & 0xfc000ffe) == 0x7c0004ac) { /* various sync */
1042 powerpc_sync(); /* Do a heavy-weight sync */
1048 if (!(pcb->pcb_flags & PCB_FPREGS)) {
1049 bzero(&pcb->pcb_fpu, sizeof(pcb->pcb_fpu));
1050 pcb->pcb_flags |= PCB_FPREGS;
1052 sig = fpu_emulate(frame, &pcb->pcb_fpu);