1129198Scognet/*- 2129198Scognet * Copyright (c) 1992 Terrence R. Lambert. 3139735Simp * Copyright (c) 1982, 1987, 1990 The Regents of the University of California. 4129198Scognet * All rights reserved. 5129198Scognet * 6129198Scognet * This code is derived from software contributed to Berkeley by 7129198Scognet * William Jolitz. 8129198Scognet * 9129198Scognet * Redistribution and use in source and binary forms, with or without 10129198Scognet * modification, are permitted provided that the following conditions 11129198Scognet * are met: 12129198Scognet * 1. Redistributions of source code must retain the above copyright 13129198Scognet * notice, this list of conditions and the following disclaimer. 14129198Scognet * 2. Redistributions in binary form must reproduce the above copyright 15129198Scognet * notice, this list of conditions and the following disclaimer in the 16129198Scognet * documentation and/or other materials provided with the distribution. 17129198Scognet * 4. Neither the name of the University nor the names of its contributors 18129198Scognet * may be used to endorse or promote products derived from this software 19129198Scognet * without specific prior written permission. 20129198Scognet * 21129198Scognet * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22129198Scognet * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23129198Scognet * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24129198Scognet * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25129198Scognet * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26129198Scognet * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27129198Scognet * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28129198Scognet * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29129198Scognet * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30129198Scognet * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31129198Scognet * SUCH DAMAGE. 32129198Scognet * 33129198Scognet * from: @(#)machdep.c 7.4 (Berkeley) 6/3/91 34129198Scognet * from: src/sys/i386/i386/machdep.c,v 1.385.2.3 2000/05/10 02:04:46 obrien 35129198Scognet * JNPR: pm_machdep.c,v 1.9.2.1 2007/08/16 15:59:10 girish 36129198Scognet */ 37129198Scognet 38129198Scognet#include <sys/cdefs.h> 39129198Scognet__FBSDID("$FreeBSD: releng/10.3/sys/mips/mips/pm_machdep.c 293581 2016-01-09 17:39:41Z dchagin $"); 40129198Scognet 41129198Scognet#include "opt_compat.h" 42129198Scognet 43129198Scognet#include <sys/types.h> 44129198Scognet#include <sys/param.h> 45129198Scognet#include <sys/systm.h> 46129198Scognet#include <sys/sysent.h> 47129198Scognet#include <sys/proc.h> 48129198Scognet#include <sys/signalvar.h> 49129198Scognet#include <sys/exec.h> 50129198Scognet#include <sys/imgact.h> 51129198Scognet#include <sys/ucontext.h> 52129198Scognet#include <sys/lock.h> 53129198Scognet#include <sys/syscallsubr.h> 54129198Scognet#include <sys/sysproto.h> 55129198Scognet#include <sys/ptrace.h> 56129198Scognet#include <sys/syslog.h> 57129198Scognet#include <vm/vm.h> 58129198Scognet#include <vm/pmap.h> 59129198Scognet#include <vm/vm_map.h> 60129198Scognet#include <vm/vm_extern.h> 61129198Scognet#include <sys/user.h> 62129198Scognet#include <sys/uio.h> 63129198Scognet#include <machine/reg.h> 64129198Scognet#include <machine/md_var.h> 65129198Scognet#include <machine/sigframe.h> 66129198Scognet#include <machine/vmparam.h> 67129198Scognet#include <sys/vnode.h> 68129198Scognet#include <fs/pseudofs/pseudofs.h> 69129198Scognet#include <fs/procfs/procfs.h> 70129198Scognet 71129198Scognet#define UCONTEXT_MAGIC 0xACEDBADE 72129198Scognet 73129198Scognet/* 74129198Scognet * Send an interrupt to process. 75129198Scognet * 76129198Scognet * Stack is set up to allow sigcode stored 77129198Scognet * at top to call routine, followed by kcall 78129198Scognet * to sigreturn routine below. After sigreturn 79129198Scognet * resets the signal mask, the stack, and the 80129198Scognet * frame pointer, it returns to the user 81129198Scognet * specified pc, psl. 82129198Scognet */ 83129198Scognetvoid 84129198Scognetsendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 85129198Scognet{ 86129198Scognet struct proc *p; 87129198Scognet struct thread *td; 88129198Scognet struct trapframe *regs; 89129198Scognet struct sigacts *psp; 90129198Scognet struct sigframe sf, *sfp; 91129198Scognet int sig; 92129198Scognet int oonstack; 93129198Scognet 94129198Scognet td = curthread; 95137463Scognet p = td->td_proc; 96129198Scognet PROC_LOCK_ASSERT(p, MA_OWNED); 97129198Scognet sig = ksi->ksi_signo; 98129198Scognet psp = p->p_sigacts; 99129198Scognet mtx_assert(&psp->ps_mtx, MA_OWNED); 100129198Scognet 101129198Scognet regs = td->td_frame; 102129198Scognet oonstack = sigonstack(regs->sp); 103129198Scognet 104248361Sandrew /* save user context */ 105129198Scognet bzero(&sf, sizeof(struct sigframe)); 106129198Scognet sf.sf_uc.uc_sigmask = *mask; 107129198Scognet sf.sf_uc.uc_stack = td->td_sigstk; 108129198Scognet sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; 109129198Scognet sf.sf_uc.uc_mcontext.mc_pc = regs->pc; 110129198Scognet sf.sf_uc.uc_mcontext.mullo = regs->mullo; 111129198Scognet sf.sf_uc.uc_mcontext.mulhi = regs->mulhi; 112129198Scognet sf.sf_uc.uc_mcontext.mc_tls = td->td_md.md_tls; 113129198Scognet sf.sf_uc.uc_mcontext.mc_regs[0] = UCONTEXT_MAGIC; /* magic number */ 114129198Scognet bcopy((void *)®s->ast, (void *)&sf.sf_uc.uc_mcontext.mc_regs[1], 115129198Scognet sizeof(sf.sf_uc.uc_mcontext.mc_regs) - sizeof(register_t)); 116129198Scognet sf.sf_uc.uc_mcontext.mc_fpused = td->td_md.md_flags & MDTD_FPUSED; 117129198Scognet if (sf.sf_uc.uc_mcontext.mc_fpused) { 118129198Scognet /* if FPU has current state, save it first */ 119129198Scognet if (td == PCPU_GET(fpcurthread)) 120129198Scognet MipsSaveCurFPState(td); 121129198Scognet bcopy((void *)&td->td_frame->f0, 122129198Scognet (void *)sf.sf_uc.uc_mcontext.mc_fpregs, 123129198Scognet sizeof(sf.sf_uc.uc_mcontext.mc_fpregs)); 124129198Scognet } 125129198Scognet 126129198Scognet /* Allocate and validate space for the signal handler context. */ 127129198Scognet if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && 128129198Scognet SIGISMEMBER(psp->ps_sigonstack, sig)) { 129129198Scognet sfp = (struct sigframe *)((vm_offset_t)(td->td_sigstk.ss_sp + 130129198Scognet td->td_sigstk.ss_size - sizeof(struct sigframe)) 131129198Scognet & ~(sizeof(__int64_t) - 1)); 132129198Scognet } else 133129198Scognet sfp = (struct sigframe *)((vm_offset_t)(regs->sp - 134129198Scognet sizeof(struct sigframe)) & ~(sizeof(__int64_t) - 1)); 135129198Scognet 136129198Scognet /* Build the argument list for the signal handler. */ 137129198Scognet regs->a0 = sig; 138129198Scognet regs->a2 = (register_t)(intptr_t)&sfp->sf_uc; 139129198Scognet if (SIGISMEMBER(psp->ps_siginfo, sig)) { 140129198Scognet /* Signal handler installed with SA_SIGINFO. */ 141129198Scognet regs->a1 = (register_t)(intptr_t)&sfp->sf_si; 142129198Scognet /* sf.sf_ahu.sf_action = (__siginfohandler_t *)catcher; */ 143129198Scognet 144129198Scognet /* fill siginfo structure */ 145129198Scognet sf.sf_si.si_signo = sig; 146129198Scognet sf.sf_si.si_code = ksi->ksi_code; 147129198Scognet sf.sf_si.si_addr = (void*)(intptr_t)regs->badvaddr; 148129198Scognet } else { 149129198Scognet /* Old FreeBSD-style arguments. */ 150129198Scognet regs->a1 = ksi->ksi_code; 151129198Scognet regs->a3 = regs->badvaddr; 152129198Scognet /* sf.sf_ahu.sf_handler = catcher; */ 153129198Scognet } 154129198Scognet 155129198Scognet mtx_unlock(&psp->ps_mtx); 156248361Sandrew PROC_UNLOCK(p); 157129198Scognet 158129198Scognet /* 159129198Scognet * Copy the sigframe out to the user's stack. 160129198Scognet */ 161129198Scognet if (copyout(&sf, sfp, sizeof(struct sigframe)) != 0) { 162129198Scognet /* 163129198Scognet * Something is wrong with the stack pointer. 164129198Scognet * ...Kill the process. 165129198Scognet */ 166129198Scognet PROC_LOCK(p); 167129198Scognet sigexit(td, SIGILL); 168129198Scognet } 169129198Scognet 170129198Scognet regs->pc = (register_t)(intptr_t)catcher; 171129198Scognet regs->t9 = (register_t)(intptr_t)catcher; 172129198Scognet regs->sp = (register_t)(intptr_t)sfp; 173129198Scognet /* 174129198Scognet * Signal trampoline code is at base of user stack. 175129198Scognet */ 176129198Scognet regs->ra = (register_t)(intptr_t)PS_STRINGS - *(p->p_sysent->sv_szsigcode); 177129198Scognet PROC_LOCK(p); 178129198Scognet mtx_lock(&psp->ps_mtx); 179129198Scognet} 180129198Scognet 181129198Scognet#ifdef GONE_IN_7 182129198Scognet/* 183129198Scognet * Build siginfo_t for SA thread 184129198Scognet */ 185129198Scognetvoid 186129198Scognetcpu_thread_siginfo(int sig, u_long code, siginfo_t *si) 187137463Scognet{ 188129198Scognet struct proc *p; 189129198Scognet struct thread *td; 190129198Scognet 191129198Scognet td = curthread; 192129198Scognet p = td->td_proc; 193129198Scognet PROC_LOCK_ASSERT(p, MA_OWNED); 194129198Scognet 195129198Scognet bzero(si, sizeof(*si)); 196129198Scognet si->si_signo = sig; 197129198Scognet si->si_code = code; 198129198Scognet /* XXXKSE fill other fields */ 199129198Scognet} 200129198Scognet#endif 201129198Scognet 202129198Scognet/* 203137463Scognet * System call to cleanup state after a signal 204248361Sandrew * has been taken. Reset signal mask and 205129198Scognet * stack state from context left by sendsig (above). 206129198Scognet * Return to previous pc as specified by 207129198Scognet * context left by sendsig. 208129198Scognet */ 209129198Scognetint 210129198Scognetsys_sigreturn(struct thread *td, struct sigreturn_args *uap) 211129198Scognet{ 212129198Scognet ucontext_t uc; 213129198Scognet int error; 214129198Scognet 215129198Scognet error = copyin(uap->sigcntxp, &uc, sizeof(uc)); 216129198Scognet if (error != 0) 217129198Scognet return (error); 218129198Scognet 219129198Scognet error = set_mcontext(td, &uc.uc_mcontext); 220129198Scognet if (error != 0) 221129198Scognet return (error); 222129198Scognet 223129198Scognet kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); 224129198Scognet 225129198Scognet return (EJUSTRETURN); 226129198Scognet} 227129198Scognet 228129198Scognetint 229129198Scognetptrace_set_pc(struct thread *td, unsigned long addr) 230129198Scognet{ 231129198Scognet td->td_frame->pc = (register_t) addr; 232129198Scognet return 0; 233129198Scognet} 234129198Scognet 235129198Scognetstatic int 236137463Scognetptrace_read_int(struct thread *td, off_t addr, int *v) 237129198Scognet{ 238129198Scognet struct iovec iov; 239129198Scognet struct uio uio; 240129198Scognet 241129198Scognet PROC_LOCK_ASSERT(td->td_proc, MA_NOTOWNED); 242129198Scognet iov.iov_base = (caddr_t) v; 243129198Scognet iov.iov_len = sizeof(int); 244129198Scognet uio.uio_iov = &iov; 245129198Scognet uio.uio_iovcnt = 1; 246129198Scognet uio.uio_offset = (off_t)addr; 247129198Scognet uio.uio_resid = sizeof(int); 248129198Scognet uio.uio_segflg = UIO_SYSSPACE; 249129198Scognet uio.uio_rw = UIO_READ; 250129198Scognet uio.uio_td = td; 251129198Scognet return proc_rwmem(td->td_proc, &uio); 252129198Scognet} 253129198Scognet 254129198Scognetstatic int 255129198Scognetptrace_write_int(struct thread *td, off_t addr, int v) 256129198Scognet{ 257129198Scognet struct iovec iov; 258129198Scognet struct uio uio; 259129198Scognet 260129198Scognet PROC_LOCK_ASSERT(td->td_proc, MA_NOTOWNED); 261129198Scognet iov.iov_base = (caddr_t) &v; 262129198Scognet iov.iov_len = sizeof(int); 263129198Scognet uio.uio_iov = &iov; 264137463Scognet uio.uio_iovcnt = 1; 265248361Sandrew uio.uio_offset = (off_t)addr; 266129198Scognet uio.uio_resid = sizeof(int); 267129198Scognet uio.uio_segflg = UIO_SYSSPACE; 268129198Scognet uio.uio_rw = UIO_WRITE; 269129198Scognet uio.uio_td = td; 270129198Scognet return proc_rwmem(td->td_proc, &uio); 271129198Scognet} 272129198Scognet 273129198Scognetint 274129198Scognetptrace_single_step(struct thread *td) 275129198Scognet{ 276129198Scognet unsigned va; 277129198Scognet struct trapframe *locr0 = td->td_frame; 278129198Scognet int i; 279129198Scognet int bpinstr = MIPS_BREAK_SSTEP; 280129198Scognet int curinstr; 281129198Scognet struct proc *p; 282129198Scognet 283129198Scognet p = td->td_proc; 284129198Scognet PROC_UNLOCK(p); 285129198Scognet /* 286129198Scognet * Fetch what's at the current location. 287129198Scognet */ 288129198Scognet ptrace_read_int(td, (off_t)locr0->pc, &curinstr); 289129198Scognet 290129198Scognet /* compute next address after current location */ 291129198Scognet if(curinstr != 0) { 292129198Scognet va = MipsEmulateBranch(locr0, locr0->pc, locr0->fsr, 293129198Scognet (uintptr_t)&curinstr); 294129198Scognet } else { 295129198Scognet va = locr0->pc + 4; 296129198Scognet } 297129198Scognet if (td->td_md.md_ss_addr) { 298129198Scognet printf("SS %s (%d): breakpoint already set at %x (va %x)\n", 299129198Scognet p->p_comm, p->p_pid, td->td_md.md_ss_addr, va); /* XXX */ 300129198Scognet return (EFAULT); 301129198Scognet } 302129198Scognet td->td_md.md_ss_addr = va; 303129198Scognet /* 304129198Scognet * Fetch what's at the current location. 305129198Scognet */ 306129198Scognet ptrace_read_int(td, (off_t)va, &td->td_md.md_ss_instr); 307129198Scognet 308129198Scognet /* 309129198Scognet * Store breakpoint instruction at the "next" location now. 310129198Scognet */ 311129198Scognet i = ptrace_write_int (td, va, bpinstr); 312129198Scognet 313129198Scognet /* 314129198Scognet * The sync'ing of I & D caches is done by procfs_domem() 315129198Scognet * through procfs_rwmem(). 316129198Scognet */ 317129198Scognet 318129198Scognet PROC_LOCK(p); 319129198Scognet if (i < 0) 320129198Scognet return (EFAULT); 321129198Scognet#if 0 322129198Scognet printf("SS %s (%d): breakpoint set at %x: %x (pc %x) br %x\n", 323129198Scognet p->p_comm, p->p_pid, p->p_md.md_ss_addr, 324248361Sandrew p->p_md.md_ss_instr, locr0->pc, curinstr); /* XXX */ 325129198Scognet#endif 326129198Scognet return (0); 327129198Scognet} 328129198Scognet 329129198Scognet 330129198Scognetvoid 331129198Scognetmakectx(struct trapframe *tf, struct pcb *pcb) 332129198Scognet{ 333129198Scognet 334129198Scognet pcb->pcb_regs.ra = tf->ra; 335129198Scognet pcb->pcb_regs.pc = tf->pc; 336129198Scognet pcb->pcb_regs.sp = tf->sp; 337129198Scognet} 338129198Scognet 339129198Scognetint 340129198Scognetfill_regs(struct thread *td, struct reg *regs) 341129198Scognet{ 342129198Scognet memcpy(regs, td->td_frame, sizeof(struct reg)); 343129198Scognet return (0); 344129198Scognet} 345129198Scognet 346129198Scognetint 347129198Scognetset_regs(struct thread *td, struct reg *regs) 348129198Scognet{ 349129198Scognet struct trapframe *f; 350129198Scognet register_t sr; 351129198Scognet 352129198Scognet f = (struct trapframe *) td->td_frame; 353129198Scognet /* 354129198Scognet * Don't allow the user to change SR 355129198Scognet */ 356129198Scognet sr = f->sr; 357129198Scognet memcpy(td->td_frame, regs, sizeof(struct reg)); 358129198Scognet f->sr = sr; 359129198Scognet return (0); 360129198Scognet} 361129198Scognet 362129198Scognetint 363129198Scognetget_mcontext(struct thread *td, mcontext_t *mcp, int flags) 364129198Scognet{ 365129198Scognet struct trapframe *tp; 366129198Scognet 367129198Scognet tp = td->td_frame; 368129198Scognet PROC_LOCK(curthread->td_proc); 369129198Scognet mcp->mc_onstack = sigonstack(tp->sp); 370129198Scognet PROC_UNLOCK(curthread->td_proc); 371129198Scognet bcopy((void *)&td->td_frame->zero, (void *)&mcp->mc_regs, 372129198Scognet sizeof(mcp->mc_regs)); 373129198Scognet 374129198Scognet mcp->mc_fpused = td->td_md.md_flags & MDTD_FPUSED; 375129198Scognet if (mcp->mc_fpused) { 376129198Scognet bcopy((void *)&td->td_frame->f0, (void *)&mcp->mc_fpregs, 377129198Scognet sizeof(mcp->mc_fpregs)); 378129198Scognet } 379129198Scognet if (flags & GET_MC_CLEAR_RET) { 380129198Scognet mcp->mc_regs[V0] = 0; 381129198Scognet mcp->mc_regs[V1] = 0; 382129198Scognet mcp->mc_regs[A3] = 0; 383129198Scognet } 384129198Scognet 385129198Scognet mcp->mc_pc = td->td_frame->pc; 386129198Scognet mcp->mullo = td->td_frame->mullo; 387129198Scognet mcp->mulhi = td->td_frame->mulhi; 388129198Scognet mcp->mc_tls = td->td_md.md_tls; 389129198Scognet return (0); 390129198Scognet} 391248361Sandrew 392129198Scognetint 393129198Scognetset_mcontext(struct thread *td, mcontext_t *mcp) 394129198Scognet{ 395129198Scognet struct trapframe *tp; 396129198Scognet 397129198Scognet tp = td->td_frame; 398129198Scognet bcopy((void *)&mcp->mc_regs, (void *)&td->td_frame->zero, 399129198Scognet sizeof(mcp->mc_regs)); 400129198Scognet 401129198Scognet td->td_md.md_flags = mcp->mc_fpused & MDTD_FPUSED; 402129198Scognet if (mcp->mc_fpused) { 403129198Scognet bcopy((void *)&mcp->mc_fpregs, (void *)&td->td_frame->f0, 404129198Scognet sizeof(mcp->mc_fpregs)); 405129198Scognet } 406129198Scognet td->td_frame->pc = mcp->mc_pc; 407129198Scognet td->td_frame->mullo = mcp->mullo; 408129198Scognet td->td_frame->mulhi = mcp->mulhi; 409129198Scognet td->td_md.md_tls = mcp->mc_tls; 410129198Scognet /* Dont let user to set any bits in Status and casue registers */ 411129198Scognet 412129198Scognet return (0); 413129198Scognet} 414129198Scognet 415129198Scognetint 416129198Scognetfill_fpregs(struct thread *td, struct fpreg *fpregs) 417129198Scognet{ 418129198Scognet if (td == PCPU_GET(fpcurthread)) 419129198Scognet MipsSaveCurFPState(td); 420129198Scognet memcpy(fpregs, &td->td_frame->f0, sizeof(struct fpreg)); 421129198Scognet return 0; 422129198Scognet} 423129198Scognet 424129198Scognetint 425129198Scognetset_fpregs(struct thread *td, struct fpreg *fpregs) 426129198Scognet{ 427129198Scognet if (PCPU_GET(fpcurthread) == td) 428129198Scognet PCPU_SET(fpcurthread, (struct thread *)0); 429129198Scognet memcpy(&td->td_frame->f0, fpregs, sizeof(struct fpreg)); 430129198Scognet return 0; 431129198Scognet} 432129198Scognet 433129198Scognet 434129198Scognet/* 435129198Scognet * Clear registers on exec 436129198Scognet * $sp is set to the stack pointer passed in. $pc is set to the entry 437129198Scognet * point given by the exec_package passed in, as is $t9 (used for PIC 438129198Scognet * code by the MIPS elf abi). 439129198Scognet */ 440129198Scognetvoid 441129198Scognetexec_setregs(struct thread *td, struct image_params *imgp, u_long stack) 442129198Scognet{ 443129198Scognet 444129198Scognet bzero((caddr_t)td->td_frame, sizeof(struct trapframe)); 445129198Scognet 446129198Scognet /* 447129198Scognet * The stack pointer has to be aligned to accommodate the largest 448129198Scognet * datatype at minimum. This probably means it should be 16-byte 449129198Scognet * aligned, but for now we're 8-byte aligning it. 450129198Scognet */ 451129198Scognet td->td_frame->sp = ((register_t) stack) & ~(sizeof(__int64_t) - 1); 452129198Scognet 453129198Scognet /* 454129198Scognet * If we're running o32 or n32 programs but have 64-bit registers, 455129198Scognet * GCC may use stack-relative addressing near the top of user 456129198Scognet * address space that, due to sign extension, will yield an 457129198Scognet * invalid address. For instance, if sp is 0x7fffff00 then GCC 458129198Scognet * might do something like this to load a word from 0x7ffffff0: 459129198Scognet * 460129198Scognet * addu sp, sp, 32768 461129198Scognet * lw t0, -32528(sp) 462129198Scognet * 463129198Scognet * On systems with 64-bit registers, sp is sign-extended to 464129198Scognet * 0xffffffff80007f00 and the load is instead done from 465129198Scognet * 0xffffffff7ffffff0. 466129198Scognet * 467129198Scognet * To prevent this, we subtract 64K from the stack pointer here. 468129198Scognet * 469129198Scognet * For consistency, we should just always do this unless we're 470129198Scognet * running n64 programs. For now, since we don't support 471129198Scognet * COMPAT_FREEBSD32 on n64 kernels, we just do it unless we're 472129198Scognet * running n64 kernels. 473129198Scognet */ 474129198Scognet#if !defined(__mips_n64) 475129198Scognet td->td_frame->sp -= 65536; 476129198Scognet#endif 477129198Scognet 478129198Scognet td->td_frame->pc = imgp->entry_addr & ~3; 479129198Scognet td->td_frame->t9 = imgp->entry_addr & ~3; /* abicall req */ 480129198Scognet td->td_frame->sr = MIPS_SR_KSU_USER | MIPS_SR_EXL | MIPS_SR_INT_IE | 481129198Scognet (mips_rd_status() & MIPS_SR_INT_MASK); 482129198Scognet#if defined(__mips_n32) 483129198Scognet td->td_frame->sr |= MIPS_SR_PX; 484129198Scognet#elif defined(__mips_n64) 485129198Scognet td->td_frame->sr |= MIPS_SR_PX | MIPS_SR_UX | MIPS_SR_KX; 486129198Scognet#endif 487129198Scognet /* 488248361Sandrew * FREEBSD_DEVELOPERS_FIXME: 489129198Scognet * Setup any other CPU-Specific registers (Not MIPS Standard) 490129198Scognet * and/or bits in other standard MIPS registers (if CPU-Specific) 491129198Scognet * that are needed. 492129198Scognet */ 493129198Scognet 494129198Scognet /* 495129198Scognet * Set up arguments for the rtld-capable crt0: 496129198Scognet * a0 stack pointer 497129198Scognet * a1 rtld cleanup (filled in by dynamic loader) 498129198Scognet * a2 rtld object (filled in by dynamic loader) 499129198Scognet * a3 ps_strings 500129198Scognet */ 501129198Scognet td->td_frame->a0 = (register_t) stack; 502129198Scognet td->td_frame->a1 = 0; 503129198Scognet td->td_frame->a2 = 0; 504129198Scognet td->td_frame->a3 = (register_t)imgp->ps_strings; 505129198Scognet 506129198Scognet td->td_md.md_flags &= ~MDTD_FPUSED; 507129198Scognet if (PCPU_GET(fpcurthread) == td) 508129198Scognet PCPU_SET(fpcurthread, (struct thread *)0); 509129198Scognet td->td_md.md_ss_addr = 0; 510129198Scognet} 511129198Scognet 512129198Scognetint 513129198Scognetptrace_clear_single_step(struct thread *td) 514129198Scognet{ 515129198Scognet int i; 516129198Scognet struct proc *p; 517129198Scognet 518129198Scognet p = td->td_proc; 519129198Scognet PROC_LOCK_ASSERT(p, MA_OWNED); 520129198Scognet if (!td->td_md.md_ss_addr) 521129198Scognet return EINVAL; 522129198Scognet 523129198Scognet /* 524129198Scognet * Restore original instruction and clear BP 525129198Scognet */ 526129198Scognet i = ptrace_write_int (td, td->td_md.md_ss_addr, td->td_md.md_ss_instr); 527129198Scognet 528129198Scognet /* The sync'ing of I & D caches is done by procfs_domem(). */ 529129198Scognet 530129198Scognet if (i < 0) { 531129198Scognet log(LOG_ERR, "SS %s %d: can't restore instruction at %x: %x\n", 532129198Scognet p->p_comm, p->p_pid, td->td_md.md_ss_addr, 533129198Scognet td->td_md.md_ss_instr); 534129198Scognet } 535129198Scognet td->td_md.md_ss_addr = 0; 536129198Scognet return 0; 537129198Scognet} 538129198Scognet