2 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
3 * Copyright (C) 1995, 1996 TooLs GmbH.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by TooLs GmbH.
17 * 4. The name of TooLs GmbH may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 * Copyright (C) 2001 Benno Rice
33 * All rights reserved.
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
38 * 1. Redistributions of source code must retain the above copyright
39 * notice, this list of conditions and the following disclaimer.
40 * 2. Redistributions in binary form must reproduce the above copyright
41 * notice, this list of conditions and the following disclaimer in the
42 * documentation and/or other materials provided with the distribution.
44 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
45 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
46 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
47 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
49 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
50 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
51 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
52 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
53 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54 * $NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $
57 #include <sys/cdefs.h>
58 __FBSDID("$FreeBSD$");
60 #include "opt_compat.h"
61 #include "opt_fpu_emu.h"
63 #include <sys/param.h>
65 #include <sys/systm.h>
72 #include <sys/imgact.h>
73 #include <sys/kernel.h>
76 #include <sys/malloc.h>
77 #include <sys/mutex.h>
78 #include <sys/signalvar.h>
79 #include <sys/syscallsubr.h>
80 #include <sys/syscall.h>
81 #include <sys/sysent.h>
82 #include <sys/sysproto.h>
83 #include <sys/ucontext.h>
86 #include <machine/altivec.h>
87 #include <machine/cpu.h>
88 #include <machine/elf.h>
89 #include <machine/fpu.h>
90 #include <machine/pcb.h>
91 #include <machine/reg.h>
92 #include <machine/sigframe.h>
93 #include <machine/trap.h>
94 #include <machine/vmparam.h>
97 #include <powerpc/fpu/fpu_extern.h>
100 #ifdef COMPAT_FREEBSD32
101 #include <compat/freebsd32/freebsd32_signal.h>
102 #include <compat/freebsd32/freebsd32_util.h>
103 #include <compat/freebsd32/freebsd32_proto.h>
105 typedef struct __ucontext32 {
107 mcontext32_t uc_mcontext;
109 struct sigaltstack32 uc_stack;
111 uint32_t __spare__[4];
116 struct siginfo32 sf_si;
119 static int grab_mcontext32(struct thread *td, mcontext32_t *, int flags);
122 static int grab_mcontext(struct thread *, mcontext_t *, int);
125 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
127 struct trapframe *tf;
132 #ifdef COMPAT_FREEBSD32
133 struct siginfo32 siginfo32;
134 struct sigframe32 sf32;
138 int oonstack, rndfsize;
144 PROC_LOCK_ASSERT(p, MA_OWNED);
147 mtx_assert(&psp->ps_mtx, MA_OWNED);
149 oonstack = sigonstack(tf->fixreg[1]);
152 * Fill siginfo structure.
154 ksi->ksi_info.si_signo = ksi->ksi_signo;
156 ksi->ksi_info.si_addr = (void *)((tf->exc == EXC_DSI) ?
157 tf->cpu.aim.dar : tf->srr0);
159 ksi->ksi_info.si_addr = (void *)((tf->exc == EXC_DSI) ?
160 tf->cpu.booke.dear : tf->srr0);
163 #ifdef COMPAT_FREEBSD32
164 if (SV_PROC_FLAG(p, SV_ILP32)) {
165 siginfo_to_siginfo32(&ksi->ksi_info, &siginfo32);
166 sig = siginfo32.si_signo;
167 code = siginfo32.si_code;
168 sfp = (caddr_t)&sf32;
169 sfpsize = sizeof(sf32);
170 rndfsize = ((sizeof(sf32) + 15) / 16) * 16;
176 memset(&sf32, 0, sizeof(sf32));
177 grab_mcontext32(td, &sf32.sf_uc.uc_mcontext, 0);
179 sf32.sf_uc.uc_sigmask = *mask;
180 sf32.sf_uc.uc_stack.ss_sp = (uintptr_t)td->td_sigstk.ss_sp;
181 sf32.sf_uc.uc_stack.ss_size = (uint32_t)td->td_sigstk.ss_size;
182 sf32.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
183 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
185 sf32.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0;
188 sig = ksi->ksi_signo;
189 code = ksi->ksi_code;
191 sfpsize = sizeof(sf);
194 * 64-bit PPC defines a 288 byte scratch region
197 rndfsize = 288 + ((sizeof(sf) + 47) / 48) * 48;
199 rndfsize = ((sizeof(sf) + 15) / 16) * 16;
206 memset(&sf, 0, sizeof(sf));
207 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
209 sf.sf_uc.uc_sigmask = *mask;
210 sf.sf_uc.uc_stack = td->td_sigstk;
211 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
212 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
214 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0;
215 #ifdef COMPAT_FREEBSD32
219 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
223 * Allocate and validate space for the signal handler context.
225 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
226 SIGISMEMBER(psp->ps_sigonstack, sig)) {
227 usfp = (void *)(td->td_sigstk.ss_sp +
228 td->td_sigstk.ss_size - rndfsize);
230 usfp = (void *)(tf->fixreg[1] - rndfsize);
234 * Translate the signal if appropriate (Linux emu ?)
236 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize)
237 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)];
240 * Save the floating-point state, if necessary, then copy it.
245 * Set up the registers to return to sigcode.
247 * r1/sp - sigframe ptr
248 * lr - sig function, dispatched to by blrl in trampoline
250 * r4 - SIGINFO ? &siginfo : exception code
252 * srr0 - trampoline function addr
254 tf->lr = (register_t)catcher;
255 tf->fixreg[1] = (register_t)usfp;
256 tf->fixreg[FIRSTARG] = sig;
257 #ifdef COMPAT_FREEBSD32
258 tf->fixreg[FIRSTARG+2] = (register_t)usfp +
259 ((SV_PROC_FLAG(p, SV_ILP32)) ?
260 offsetof(struct sigframe32, sf_uc) :
261 offsetof(struct sigframe, sf_uc));
263 tf->fixreg[FIRSTARG+2] = (register_t)usfp +
264 offsetof(struct sigframe, sf_uc);
266 if (SIGISMEMBER(psp->ps_siginfo, sig)) {
268 * Signal handler installed with SA_SIGINFO.
270 #ifdef COMPAT_FREEBSD32
271 if (SV_PROC_FLAG(p, SV_ILP32)) {
272 sf32.sf_si = siginfo32;
273 tf->fixreg[FIRSTARG+1] = (register_t)usfp +
274 offsetof(struct sigframe32, sf_si);
275 sf32.sf_si = siginfo32;
278 tf->fixreg[FIRSTARG+1] = (register_t)usfp +
279 offsetof(struct sigframe, sf_si);
280 sf.sf_si = ksi->ksi_info;
281 #ifdef COMPAT_FREEBSD32
285 /* Old FreeBSD-style arguments. */
286 tf->fixreg[FIRSTARG+1] = code;
288 tf->fixreg[FIRSTARG+3] = (tf->exc == EXC_DSI) ?
289 tf->cpu.aim.dar : tf->srr0;
291 tf->fixreg[FIRSTARG+3] = (tf->exc == EXC_DSI) ?
292 tf->cpu.booke.dear : tf->srr0;
295 mtx_unlock(&psp->ps_mtx);
298 tf->srr0 = (register_t)p->p_sysent->sv_sigcode_base;
301 * copy the frame out to userland.
303 if (copyout(sfp, usfp, sfpsize) != 0) {
305 * Process has trashed its stack. Kill it.
307 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp);
312 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td,
313 tf->srr0, tf->fixreg[1]);
316 mtx_lock(&psp->ps_mtx);
320 sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
325 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
327 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
328 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
332 error = set_mcontext(td, &uc.uc_mcontext);
336 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
338 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x",
339 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]);
341 return (EJUSTRETURN);
344 #ifdef COMPAT_FREEBSD4
346 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap)
349 return sys_sigreturn(td, (struct sigreturn_args *)uap);
354 * Construct a PCB from a trapframe. This is called from kdb_trap() where
355 * we want to start a backtrace from the function that caused us to enter
356 * the debugger. We have the context in the trapframe, but base the trace
357 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
358 * enough for a backtrace.
361 makectx(struct trapframe *tf, struct pcb *pcb)
364 pcb->pcb_lr = tf->srr0;
365 pcb->pcb_sp = tf->fixreg[1];
369 * get_mcontext/sendsig helper routine that doesn't touch the
373 grab_mcontext(struct thread *td, mcontext_t *mcp, int flags)
379 memset(mcp, 0, sizeof(mcontext_t));
381 mcp->mc_vers = _MC_VERSION;
383 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe));
384 if (flags & GET_MC_CLEAR_RET) {
390 * This assumes that floating-point context is *not* lazy,
391 * so if the thread has used FP there would have been a
392 * FP-unavailable exception that would have set things up
395 if (pcb->pcb_flags & PCB_FPREGS) {
396 if (pcb->pcb_flags & PCB_FPU) {
397 KASSERT(td == curthread,
398 ("get_mcontext: fp save not curthread"));
403 mcp->mc_flags |= _MC_FP_VALID;
404 memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double));
405 memcpy(mcp->mc_fpreg, pcb->pcb_fpu.fpr, 32*sizeof(double));
409 * Repeat for Altivec context
412 if (pcb->pcb_flags & PCB_VEC) {
413 KASSERT(td == curthread,
414 ("get_mcontext: fp save not curthread"));
418 mcp->mc_flags |= _MC_AV_VALID;
419 mcp->mc_vscr = pcb->pcb_vec.vscr;
420 mcp->mc_vrsave = pcb->pcb_vec.vrsave;
421 memcpy(mcp->mc_avec, pcb->pcb_vec.vr, sizeof(mcp->mc_avec));
424 mcp->mc_len = sizeof(*mcp);
430 get_mcontext(struct thread *td, mcontext_t *mcp, int flags)
434 error = grab_mcontext(td, mcp, flags);
436 PROC_LOCK(curthread->td_proc);
437 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]);
438 PROC_UNLOCK(curthread->td_proc);
445 set_mcontext(struct thread *td, mcontext_t *mcp)
448 struct trapframe *tf;
454 if (mcp->mc_vers != _MC_VERSION || mcp->mc_len != sizeof(*mcp))
458 * Don't let the user set privileged MSR bits
460 if ((mcp->mc_srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) {
464 /* Copy trapframe, preserving TLS pointer across context change */
465 if (SV_PROC_FLAG(td->td_proc, SV_LP64))
466 tls = tf->fixreg[13];
469 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame));
470 if (SV_PROC_FLAG(td->td_proc, SV_LP64))
471 tf->fixreg[13] = tls;
475 if (mcp->mc_flags & _MC_FP_VALID) {
476 /* enable_fpu() will happen lazily on a fault */
477 pcb->pcb_flags |= PCB_FPREGS;
478 memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double));
479 memcpy(pcb->pcb_fpu.fpr, mcp->mc_fpreg, 32*sizeof(double));
482 if (mcp->mc_flags & _MC_AV_VALID) {
483 if ((pcb->pcb_flags & PCB_VEC) != PCB_VEC) {
488 pcb->pcb_vec.vscr = mcp->mc_vscr;
489 pcb->pcb_vec.vrsave = mcp->mc_vrsave;
490 memcpy(pcb->pcb_vec.vr, mcp->mc_avec, sizeof(mcp->mc_avec));
497 * Set set up registers on exec.
500 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
502 struct trapframe *tf;
505 register_t entry_desc[3];
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.
527 * XXX We have to set both regs and retval here due to different
528 * XXX calling convention in trap.c and init_main.c.
531 /* Collect argc from the user stack */
532 argc = fuword((void *)stack);
535 * XXX PG: these get overwritten in the syscall return code.
536 * execve() should return EJUSTRETURN, like it does on NetBSD.
537 * Emulate by setting the syscall return value cells. The
538 * registers still have to be set for init's fork trampoline.
540 td->td_retval[0] = argc;
541 td->td_retval[1] = stack + sizeof(register_t);
542 tf->fixreg[3] = argc;
543 tf->fixreg[4] = stack + sizeof(register_t);
544 tf->fixreg[5] = stack + (2 + argc)*sizeof(register_t);
545 tf->fixreg[6] = 0; /* auxillary vector */
546 tf->fixreg[7] = 0; /* termination vector */
547 tf->fixreg[8] = (register_t)imgp->ps_strings; /* NetBSD extension */
551 * For 64-bit, we need to disentangle the function descriptor
555 * 2. Environment pointer (r11)
558 (void)copyin((void *)imgp->entry_addr, entry_desc, sizeof(entry_desc));
559 tf->srr0 = entry_desc[0] + imgp->reloc_base;
560 tf->fixreg[2] = entry_desc[1] + imgp->reloc_base;
561 tf->fixreg[11] = entry_desc[2] + imgp->reloc_base;
562 tf->srr1 = PSL_SF | PSL_USERSET | PSL_FE_DFLT;
563 if (mfmsr() & PSL_HV)
566 tf->srr0 = imgp->entry_addr;
567 tf->srr1 = PSL_USERSET | PSL_FE_DFLT;
569 td->td_pcb->pcb_flags = 0;
572 #ifdef COMPAT_FREEBSD32
574 ppc32_setregs(struct thread *td, struct image_params *imgp, u_long stack)
576 struct trapframe *tf;
580 bzero(tf, sizeof *tf);
581 tf->fixreg[1] = -roundup(-stack + 8, 16);
583 argc = fuword32((void *)stack);
585 td->td_retval[0] = argc;
586 td->td_retval[1] = stack + sizeof(uint32_t);
587 tf->fixreg[3] = argc;
588 tf->fixreg[4] = stack + sizeof(uint32_t);
589 tf->fixreg[5] = stack + (2 + argc)*sizeof(uint32_t);
590 tf->fixreg[6] = 0; /* auxillary vector */
591 tf->fixreg[7] = 0; /* termination vector */
592 tf->fixreg[8] = (register_t)imgp->ps_strings; /* NetBSD extension */
594 tf->srr0 = imgp->entry_addr;
595 tf->srr1 = PSL_USERSET | PSL_FE_DFLT;
597 if (mfmsr() & PSL_HV)
599 td->td_pcb->pcb_flags = 0;
604 fill_regs(struct thread *td, struct reg *regs)
606 struct trapframe *tf;
609 memcpy(regs, tf, sizeof(struct reg));
615 fill_dbregs(struct thread *td, struct dbreg *dbregs)
617 /* No debug registers on PowerPC */
622 fill_fpregs(struct thread *td, struct fpreg *fpregs)
628 if ((pcb->pcb_flags & PCB_FPREGS) == 0)
629 memset(fpregs, 0, sizeof(struct fpreg));
631 memcpy(fpregs, &pcb->pcb_fpu, sizeof(struct fpreg));
637 set_regs(struct thread *td, struct reg *regs)
639 struct trapframe *tf;
642 memcpy(tf, regs, sizeof(struct reg));
648 set_dbregs(struct thread *td, struct dbreg *dbregs)
650 /* No debug registers on PowerPC */
655 set_fpregs(struct thread *td, struct fpreg *fpregs)
660 pcb->pcb_flags |= PCB_FPREGS;
661 memcpy(&pcb->pcb_fpu, fpregs, sizeof(struct fpreg));
666 #ifdef COMPAT_FREEBSD32
668 set_regs32(struct thread *td, struct reg32 *regs)
670 struct trapframe *tf;
674 for (i = 0; i < 32; i++)
675 tf->fixreg[i] = regs->fixreg[i];
686 fill_regs32(struct thread *td, struct reg32 *regs)
688 struct trapframe *tf;
692 for (i = 0; i < 32; i++)
693 regs->fixreg[i] = tf->fixreg[i];
704 grab_mcontext32(struct thread *td, mcontext32_t *mcp, int flags)
709 error = grab_mcontext(td, &mcp64, flags);
713 mcp->mc_vers = mcp64.mc_vers;
714 mcp->mc_flags = mcp64.mc_flags;
715 mcp->mc_onstack = mcp64.mc_onstack;
716 mcp->mc_len = mcp64.mc_len;
717 memcpy(mcp->mc_avec,mcp64.mc_avec,sizeof(mcp64.mc_avec));
718 memcpy(mcp->mc_av,mcp64.mc_av,sizeof(mcp64.mc_av));
719 for (i = 0; i < 42; i++)
720 mcp->mc_frame[i] = mcp64.mc_frame[i];
721 memcpy(mcp->mc_fpreg,mcp64.mc_fpreg,sizeof(mcp64.mc_fpreg));
727 get_mcontext32(struct thread *td, mcontext32_t *mcp, int flags)
731 error = grab_mcontext32(td, mcp, flags);
733 PROC_LOCK(curthread->td_proc);
734 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]);
735 PROC_UNLOCK(curthread->td_proc);
742 set_mcontext32(struct thread *td, mcontext32_t *mcp)
747 mcp64.mc_vers = mcp->mc_vers;
748 mcp64.mc_flags = mcp->mc_flags;
749 mcp64.mc_onstack = mcp->mc_onstack;
750 mcp64.mc_len = mcp->mc_len;
751 memcpy(mcp64.mc_avec,mcp->mc_avec,sizeof(mcp64.mc_avec));
752 memcpy(mcp64.mc_av,mcp->mc_av,sizeof(mcp64.mc_av));
753 for (i = 0; i < 42; i++)
754 mcp64.mc_frame[i] = mcp->mc_frame[i];
755 mcp64.mc_srr1 |= (td->td_frame->srr1 & 0xFFFFFFFF00000000ULL);
756 memcpy(mcp64.mc_fpreg,mcp->mc_fpreg,sizeof(mcp64.mc_fpreg));
758 error = set_mcontext(td, &mcp64);
764 #ifdef COMPAT_FREEBSD32
766 freebsd32_sigreturn(struct thread *td, struct freebsd32_sigreturn_args *uap)
771 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
773 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
774 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
778 error = set_mcontext32(td, &uc.uc_mcontext);
782 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
784 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x",
785 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]);
787 return (EJUSTRETURN);
791 * The first two fields of a ucontext_t are the signal mask and the machine
792 * context. The next field is uc_link; we want to avoid destroying the link
793 * when copying out contexts.
795 #define UC32_COPY_SIZE offsetof(ucontext32_t, uc_link)
798 freebsd32_getcontext(struct thread *td, struct freebsd32_getcontext_args *uap)
803 if (uap->ucp == NULL)
806 get_mcontext32(td, &uc.uc_mcontext, GET_MC_CLEAR_RET);
807 PROC_LOCK(td->td_proc);
808 uc.uc_sigmask = td->td_sigmask;
809 PROC_UNLOCK(td->td_proc);
810 ret = copyout(&uc, uap->ucp, UC32_COPY_SIZE);
816 freebsd32_setcontext(struct thread *td, struct freebsd32_setcontext_args *uap)
821 if (uap->ucp == NULL)
824 ret = copyin(uap->ucp, &uc, UC32_COPY_SIZE);
826 ret = set_mcontext32(td, &uc.uc_mcontext);
828 kern_sigprocmask(td, SIG_SETMASK,
829 &uc.uc_sigmask, NULL, 0);
833 return (ret == 0 ? EJUSTRETURN : ret);
837 freebsd32_swapcontext(struct thread *td, struct freebsd32_swapcontext_args *uap)
842 if (uap->oucp == NULL || uap->ucp == NULL)
845 get_mcontext32(td, &uc.uc_mcontext, GET_MC_CLEAR_RET);
846 PROC_LOCK(td->td_proc);
847 uc.uc_sigmask = td->td_sigmask;
848 PROC_UNLOCK(td->td_proc);
849 ret = copyout(&uc, uap->oucp, UC32_COPY_SIZE);
851 ret = copyin(uap->ucp, &uc, UC32_COPY_SIZE);
853 ret = set_mcontext32(td, &uc.uc_mcontext);
855 kern_sigprocmask(td, SIG_SETMASK,
856 &uc.uc_sigmask, NULL, 0);
861 return (ret == 0 ? EJUSTRETURN : ret);
867 cpu_set_syscall_retval(struct thread *td, int error)
870 struct trapframe *tf;
873 if (error == EJUSTRETURN)
879 if (tf->fixreg[0] == SYS___syscall &&
880 (SV_PROC_FLAG(p, SV_ILP32))) {
881 int code = tf->fixreg[FIRSTARG + 1];
882 if (p->p_sysent->sv_mask)
883 code &= p->p_sysent->sv_mask;
884 fixup = (code != SYS_freebsd6_lseek && code != SYS_lseek) ?
893 * 64-bit return, 32-bit syscall. Fixup byte order
895 tf->fixreg[FIRSTARG] = 0;
896 tf->fixreg[FIRSTARG + 1] = td->td_retval[0];
898 tf->fixreg[FIRSTARG] = td->td_retval[0];
899 tf->fixreg[FIRSTARG + 1] = td->td_retval[1];
901 tf->cr &= ~0x10000000; /* Unset summary overflow */
905 * Set user's pc back to redo the system call.
910 if (p->p_sysent->sv_errsize) {
911 error = (error < p->p_sysent->sv_errsize) ?
912 p->p_sysent->sv_errtbl[error] : -1;
914 tf->fixreg[FIRSTARG] = error;
915 tf->cr |= 0x10000000; /* Set summary overflow */
921 * Threading functions
924 cpu_thread_exit(struct thread *td)
929 cpu_thread_clean(struct thread *td)
934 cpu_thread_alloc(struct thread *td)
938 pcb = (struct pcb *)((td->td_kstack + td->td_kstack_pages * PAGE_SIZE -
939 sizeof(struct pcb)) & ~0x2fUL);
941 td->td_frame = (struct trapframe *)pcb - 1;
945 cpu_thread_free(struct thread *td)
950 cpu_set_user_tls(struct thread *td, void *tls_base)
953 if (SV_PROC_FLAG(td->td_proc, SV_LP64))
954 td->td_frame->fixreg[13] = (register_t)tls_base + 0x7010;
956 td->td_frame->fixreg[2] = (register_t)tls_base + 0x7008;
961 cpu_set_upcall(struct thread *td, struct thread *td0)
964 struct trapframe *tf;
965 struct callframe *cf;
969 /* Copy the upcall pcb */
970 bcopy(td0->td_pcb, pcb2, sizeof(*pcb2));
972 /* Create a stack for the new thread */
974 bcopy(td0->td_frame, tf, sizeof(struct trapframe));
975 tf->fixreg[FIRSTARG] = 0;
976 tf->fixreg[FIRSTARG + 1] = 0;
977 tf->cr &= ~0x10000000;
979 /* Set registers for trampoline to user mode. */
980 cf = (struct callframe *)tf - 1;
981 memset(cf, 0, sizeof(struct callframe));
982 cf->cf_func = (register_t)fork_return;
983 cf->cf_arg0 = (register_t)td;
984 cf->cf_arg1 = (register_t)tf;
986 pcb2->pcb_sp = (register_t)cf;
988 pcb2->pcb_lr = ((register_t *)fork_trampoline)[0];
989 pcb2->pcb_toc = ((register_t *)fork_trampoline)[1];
991 pcb2->pcb_lr = (register_t)fork_trampoline;
993 pcb2->pcb_cpu.aim.usr_vsid = 0;
995 /* Setup to release spin count in fork_exit(). */
996 td->td_md.md_spinlock_count = 1;
997 td->td_md.md_saved_msr = PSL_KERNSET;
1001 cpu_set_upcall_kse(struct thread *td, void (*entry)(void *), void *arg,
1004 struct trapframe *tf;
1008 /* align stack and alloc space for frame ptr and saved LR */
1009 #ifdef __powerpc64__
1010 sp = ((uintptr_t)stack->ss_sp + stack->ss_size - 48) &
1013 sp = ((uintptr_t)stack->ss_sp + stack->ss_size - 8) &
1016 bzero(tf, sizeof(struct trapframe));
1018 tf->fixreg[1] = (register_t)sp;
1019 tf->fixreg[3] = (register_t)arg;
1020 if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) {
1021 tf->srr0 = (register_t)entry;
1022 tf->srr1 = PSL_USERSET | PSL_FE_DFLT;
1023 #ifdef __powerpc64__
1024 tf->srr1 &= ~PSL_SF;
1027 #ifdef __powerpc64__
1028 register_t entry_desc[3];
1029 (void)copyin((void *)entry, entry_desc, sizeof(entry_desc));
1030 tf->srr0 = entry_desc[0];
1031 tf->fixreg[2] = entry_desc[1];
1032 tf->fixreg[11] = entry_desc[2];
1033 tf->srr1 = PSL_SF | PSL_USERSET | PSL_FE_DFLT;
1037 #ifdef __powerpc64__
1038 if (mfmsr() & PSL_HV)
1041 td->td_pcb->pcb_flags = 0;
1043 td->td_retval[0] = (register_t)entry;
1044 td->td_retval[1] = 0;
1048 ppc_instr_emulate(struct trapframe *frame, struct pcb *pcb)
1053 instr = fuword32((void *)frame->srr0);
1056 if ((instr & 0xfc1fffff) == 0x7c1f42a6) { /* mfpvr */
1057 reg = (instr & ~0xfc1fffff) >> 21;
1058 frame->fixreg[reg] = mfpvr();
1063 if ((instr & 0xfc000ffe) == 0x7c0004ac) { /* various sync */
1064 powerpc_sync(); /* Do a heavy-weight sync */
1070 if (!(pcb->pcb_flags & PCB_FPREGS)) {
1071 bzero(&pcb->pcb_fpu, sizeof(pcb->pcb_fpu));
1072 pcb->pcb_flags |= PCB_FPREGS;
1074 sig = fpu_emulate(frame, (struct fpreg *)&pcb->pcb_fpu);