linux32_machdep.c revision 1.1.2.2
1 1.1.2.2 yamt /* $NetBSD: linux32_machdep.c,v 1.1.2.2 2006/02/18 15:38:59 yamt Exp $ */ 2 1.1.2.2 yamt 3 1.1.2.2 yamt /*- 4 1.1.2.2 yamt * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved. 5 1.1.2.2 yamt * 6 1.1.2.2 yamt * Redistribution and use in source and binary forms, with or without 7 1.1.2.2 yamt * modification, are permitted provided that the following conditions 8 1.1.2.2 yamt * are met: 9 1.1.2.2 yamt * 1. Redistributions of source code must retain the above copyright 10 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer. 11 1.1.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 12 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer in the 13 1.1.2.2 yamt * documentation and/or other materials provided with the distribution. 14 1.1.2.2 yamt * 3. All advertising materials mentioning features or use of this software 15 1.1.2.2 yamt * must display the following acknowledgement: 16 1.1.2.2 yamt * This product includes software developed by Emmanuel Dreyfus 17 1.1.2.2 yamt * 4. The name of the author may not be used to endorse or promote 18 1.1.2.2 yamt * products derived from this software without specific prior written 19 1.1.2.2 yamt * permission. 20 1.1.2.2 yamt * 21 1.1.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS'' 22 1.1.2.2 yamt * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 23 1.1.2.2 yamt * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 1.1.2.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 25 1.1.2.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 1.1.2.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 1.1.2.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 1.1.2.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 1.1.2.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 1.1.2.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 1.1.2.2 yamt * POSSIBILITY OF SUCH DAMAGE. 32 1.1.2.2 yamt */ 33 1.1.2.2 yamt #include <sys/cdefs.h> 34 1.1.2.2 yamt __KERNEL_RCSID(0, "$NetBSD: linux32_machdep.c,v 1.1.2.2 2006/02/18 15:38:59 yamt Exp $"); 35 1.1.2.2 yamt 36 1.1.2.2 yamt #include <sys/param.h> 37 1.1.2.2 yamt #include <sys/systm.h> 38 1.1.2.2 yamt #include <sys/signalvar.h> 39 1.1.2.2 yamt #include <sys/kernel.h> 40 1.1.2.2 yamt #include <sys/proc.h> 41 1.1.2.2 yamt #include <sys/user.h> 42 1.1.2.2 yamt #include <sys/buf.h> 43 1.1.2.2 yamt #include <sys/reboot.h> 44 1.1.2.2 yamt #include <sys/conf.h> 45 1.1.2.2 yamt #include <sys/exec.h> 46 1.1.2.2 yamt #include <sys/file.h> 47 1.1.2.2 yamt #include <sys/callout.h> 48 1.1.2.2 yamt #include <sys/malloc.h> 49 1.1.2.2 yamt #include <sys/mbuf.h> 50 1.1.2.2 yamt #include <sys/msgbuf.h> 51 1.1.2.2 yamt #include <sys/mount.h> 52 1.1.2.2 yamt #include <sys/vnode.h> 53 1.1.2.2 yamt #include <sys/device.h> 54 1.1.2.2 yamt #include <sys/sa.h> 55 1.1.2.2 yamt #include <sys/syscallargs.h> 56 1.1.2.2 yamt #include <sys/filedesc.h> 57 1.1.2.2 yamt #include <sys/exec_elf.h> 58 1.1.2.2 yamt #include <sys/disklabel.h> 59 1.1.2.2 yamt #include <sys/ioctl.h> 60 1.1.2.2 yamt #include <sys/wait.h> 61 1.1.2.2 yamt #include <miscfs/specfs/specdev.h> 62 1.1.2.2 yamt 63 1.1.2.2 yamt #include <machine/netbsd32_machdep.h> 64 1.1.2.2 yamt 65 1.1.2.2 yamt #include <compat/netbsd32/netbsd32.h> 66 1.1.2.2 yamt #include <compat/netbsd32/netbsd32_syscallargs.h> 67 1.1.2.2 yamt 68 1.1.2.2 yamt #include <compat/linux/common/linux_signal.h> 69 1.1.2.2 yamt #include <compat/linux/common/linux_errno.h> 70 1.1.2.2 yamt 71 1.1.2.2 yamt #include <compat/linux32/common/linux32_types.h> 72 1.1.2.2 yamt #include <compat/linux32/common/linux32_errno.h> 73 1.1.2.2 yamt #include <compat/linux32/common/linux32_machdep.h> 74 1.1.2.2 yamt #include <compat/linux32/common/linux32_signal.h> 75 1.1.2.2 yamt #include <compat/linux32/common/linux32_exec.h> 76 1.1.2.2 yamt #include <compat/linux32/linux32_syscallargs.h> 77 1.1.2.2 yamt 78 1.1.2.2 yamt #include <machine/cpu.h> 79 1.1.2.2 yamt #include <machine/cpufunc.h> 80 1.1.2.2 yamt #include <machine/psl.h> 81 1.1.2.2 yamt #include <machine/reg.h> 82 1.1.2.2 yamt #include <machine/segments.h> 83 1.1.2.2 yamt #include <machine/specialreg.h> 84 1.1.2.2 yamt #include <machine/sysarch.h> 85 1.1.2.2 yamt #include <machine/vmparam.h> 86 1.1.2.2 yamt 87 1.1.2.2 yamt extern char linux32_sigcode[1]; 88 1.1.2.2 yamt extern char linux32_rt_sigcode[1]; 89 1.1.2.2 yamt extern char linux32_esigcode[1]; 90 1.1.2.2 yamt 91 1.1.2.2 yamt extern void (osyscall_return) __P((void)); 92 1.1.2.2 yamt 93 1.1.2.2 yamt static void linux32_save_ucontext __P((struct lwp *, struct trapframe *, 94 1.1.2.2 yamt const sigset_t *, struct sigaltstack *, struct linux32_ucontext *)); 95 1.1.2.2 yamt static void linux32_save_sigcontext __P((struct lwp *, struct trapframe *, 96 1.1.2.2 yamt const sigset_t *, struct linux32_sigcontext *)); 97 1.1.2.2 yamt static void linux32_rt_sendsig __P((const ksiginfo_t *, const sigset_t *)); 98 1.1.2.2 yamt static void linux32_old_sendsig __P((const ksiginfo_t *, const sigset_t *)); 99 1.1.2.2 yamt static int linux32_restore_sigcontext __P((struct lwp *, 100 1.1.2.2 yamt struct linux32_sigcontext *, register_t *)); 101 1.1.2.2 yamt 102 1.1.2.2 yamt void 103 1.1.2.2 yamt linux32_sendsig(const ksiginfo_t *ksi, const sigset_t *mask) 104 1.1.2.2 yamt { 105 1.1.2.2 yamt if (SIGACTION(curproc, ksi->ksi_signo).sa_flags & SA_SIGINFO) 106 1.1.2.2 yamt linux32_rt_sendsig(ksi, mask); 107 1.1.2.2 yamt else 108 1.1.2.2 yamt linux32_old_sendsig(ksi, mask); 109 1.1.2.2 yamt return; 110 1.1.2.2 yamt } 111 1.1.2.2 yamt 112 1.1.2.2 yamt void 113 1.1.2.2 yamt linux32_old_sendsig(const ksiginfo_t *ksi, const sigset_t *mask) 114 1.1.2.2 yamt { 115 1.1.2.2 yamt struct lwp *l = curlwp; 116 1.1.2.2 yamt struct proc *p = l->l_proc; 117 1.1.2.2 yamt struct trapframe *tf; 118 1.1.2.2 yamt struct linux32_sigframe *fp, frame; 119 1.1.2.2 yamt int onstack; 120 1.1.2.2 yamt int sig = ksi->ksi_signo; 121 1.1.2.2 yamt sig_t catcher = SIGACTION(p, sig).sa_handler; 122 1.1.2.2 yamt struct sigaltstack *sas = &p->p_sigctx.ps_sigstk; 123 1.1.2.2 yamt 124 1.1.2.2 yamt tf = l->l_md.md_regs; 125 1.1.2.2 yamt /* Do we need to jump onto the signal stack? */ 126 1.1.2.2 yamt onstack = (sas->ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && 127 1.1.2.2 yamt (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0; 128 1.1.2.2 yamt 129 1.1.2.2 yamt 130 1.1.2.2 yamt /* Allocate space for the signal handler context. */ 131 1.1.2.2 yamt if (onstack) 132 1.1.2.2 yamt fp = (struct linux32_sigframe *)((caddr_t)sas->ss_sp + 133 1.1.2.2 yamt sas->ss_size); 134 1.1.2.2 yamt else 135 1.1.2.2 yamt fp = (struct linux32_sigframe *)tf->tf_rsp; 136 1.1.2.2 yamt fp--; 137 1.1.2.2 yamt 138 1.1.2.2 yamt /* Build stack frame for signal trampoline. */ 139 1.1.2.2 yamt frame.sf_handler = (linux32_handler_t)(long)catcher; 140 1.1.2.2 yamt frame.sf_sig = native_to_linux32_signo[sig]; 141 1.1.2.2 yamt 142 1.1.2.2 yamt linux32_save_sigcontext(l, tf, mask, &frame.sf_sc); 143 1.1.2.2 yamt 144 1.1.2.2 yamt if (copyout(&frame, fp, sizeof(frame)) != 0) { 145 1.1.2.2 yamt /* 146 1.1.2.2 yamt * Process has trashed its stack; give it an illegal 147 1.1.2.2 yamt * instruction to halt it in its tracks. 148 1.1.2.2 yamt */ 149 1.1.2.2 yamt sigexit(l, SIGILL); 150 1.1.2.2 yamt /* NOTREACHED */ 151 1.1.2.2 yamt } 152 1.1.2.2 yamt 153 1.1.2.2 yamt /* 154 1.1.2.2 yamt * Build context to run handler in. 155 1.1.2.2 yamt */ 156 1.1.2.2 yamt tf->tf_gs = GSEL(GUDATA32_SEL, SEL_UPL) & 0xffffffff; 157 1.1.2.2 yamt tf->tf_fs = GSEL(GUDATA32_SEL, SEL_UPL) & 0xffffffff; 158 1.1.2.2 yamt tf->tf_es = GSEL(GUDATA32_SEL, SEL_UPL) & 0xffffffff; 159 1.1.2.2 yamt tf->tf_ds = GSEL(GUDATA32_SEL, SEL_UPL) & 0xffffffff; 160 1.1.2.2 yamt tf->tf_rip = ((long)p->p_sigctx.ps_sigcode) & 0xffffffff; 161 1.1.2.2 yamt tf->tf_cs = GSEL(GUCODE32_SEL, SEL_UPL) & 0xffffffff; 162 1.1.2.2 yamt tf->tf_rflags &= ~(PSL_T|PSL_VM|PSL_AC) & 0xffffffff; 163 1.1.2.2 yamt tf->tf_rsp = (long)fp & 0xffffffff; 164 1.1.2.2 yamt tf->tf_ss = GSEL(GUDATA32_SEL, SEL_UPL) & 0xffffffff; 165 1.1.2.2 yamt 166 1.1.2.2 yamt /* Remember that we're now on the signal stack. */ 167 1.1.2.2 yamt if (onstack) 168 1.1.2.2 yamt sas->ss_flags |= SS_ONSTACK; 169 1.1.2.2 yamt 170 1.1.2.2 yamt return; 171 1.1.2.2 yamt } 172 1.1.2.2 yamt 173 1.1.2.2 yamt void 174 1.1.2.2 yamt linux32_rt_sendsig(const ksiginfo_t *ksi, const sigset_t *mask) 175 1.1.2.2 yamt { 176 1.1.2.2 yamt struct lwp *l = curlwp; 177 1.1.2.2 yamt struct proc *p = l->l_proc; 178 1.1.2.2 yamt struct trapframe *tf; 179 1.1.2.2 yamt struct linux32_rt_sigframe *fp, frame; 180 1.1.2.2 yamt int onstack; 181 1.1.2.2 yamt linux32_siginfo_t *lsi; 182 1.1.2.2 yamt int sig = ksi->ksi_signo; 183 1.1.2.2 yamt sig_t catcher = SIGACTION(p, sig).sa_handler; 184 1.1.2.2 yamt struct sigaltstack *sas = &p->p_sigctx.ps_sigstk; 185 1.1.2.2 yamt 186 1.1.2.2 yamt tf = l->l_md.md_regs; 187 1.1.2.2 yamt /* Do we need to jump onto the signal stack? */ 188 1.1.2.2 yamt onstack = (sas->ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && 189 1.1.2.2 yamt (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0; 190 1.1.2.2 yamt 191 1.1.2.2 yamt 192 1.1.2.2 yamt /* Allocate space for the signal handler context. */ 193 1.1.2.2 yamt if (onstack) 194 1.1.2.2 yamt fp = (struct linux32_rt_sigframe *)((caddr_t)sas->ss_sp + 195 1.1.2.2 yamt sas->ss_size); 196 1.1.2.2 yamt else 197 1.1.2.2 yamt fp = (struct linux32_rt_sigframe *)tf->tf_rsp; 198 1.1.2.2 yamt fp--; 199 1.1.2.2 yamt 200 1.1.2.2 yamt /* Build stack frame for signal trampoline. */ 201 1.1.2.2 yamt frame.sf_handler = (linux32_handler_t)(long)catcher; 202 1.1.2.2 yamt frame.sf_sig = native_to_linux32_signo[sig]; 203 1.1.2.2 yamt frame.sf_sip = (linux32_siginfop_t)(long)&fp->sf_si; 204 1.1.2.2 yamt frame.sf_ucp = (linux32_ucontextp_t)(long)&fp->sf_uc; 205 1.1.2.2 yamt 206 1.1.2.2 yamt lsi = &frame.sf_si; 207 1.1.2.2 yamt (void)memset(lsi, 0, sizeof(frame.sf_si)); 208 1.1.2.2 yamt lsi->lsi_errno = native_to_linux32_errno[ksi->ksi_errno]; 209 1.1.2.2 yamt lsi->lsi_code = ksi->ksi_code; 210 1.1.2.2 yamt lsi->lsi_signo = native_to_linux32_signo[frame.sf_sig]; 211 1.1.2.2 yamt switch (lsi->lsi_signo) { 212 1.1.2.2 yamt case LINUX32_SIGILL: 213 1.1.2.2 yamt case LINUX32_SIGFPE: 214 1.1.2.2 yamt case LINUX32_SIGSEGV: 215 1.1.2.2 yamt case LINUX32_SIGBUS: 216 1.1.2.2 yamt case LINUX32_SIGTRAP: 217 1.1.2.2 yamt lsi->lsi_addr = (netbsd32_voidp)(long)ksi->ksi_addr; 218 1.1.2.2 yamt break; 219 1.1.2.2 yamt case LINUX32_SIGCHLD: 220 1.1.2.2 yamt lsi->lsi_uid = ksi->ksi_uid; 221 1.1.2.2 yamt lsi->lsi_pid = ksi->ksi_pid; 222 1.1.2.2 yamt lsi->lsi_utime = ksi->ksi_utime; 223 1.1.2.2 yamt lsi->lsi_stime = ksi->ksi_stime; 224 1.1.2.2 yamt 225 1.1.2.2 yamt /* We use the same codes */ 226 1.1.2.2 yamt lsi->lsi_code = ksi->ksi_code; 227 1.1.2.2 yamt /* XXX is that right? */ 228 1.1.2.2 yamt lsi->lsi_status = WEXITSTATUS(ksi->ksi_status); 229 1.1.2.2 yamt break; 230 1.1.2.2 yamt case LINUX32_SIGIO: 231 1.1.2.2 yamt lsi->lsi_band = ksi->ksi_band; 232 1.1.2.2 yamt lsi->lsi_fd = ksi->ksi_fd; 233 1.1.2.2 yamt break; 234 1.1.2.2 yamt default: 235 1.1.2.2 yamt lsi->lsi_uid = ksi->ksi_uid; 236 1.1.2.2 yamt lsi->lsi_pid = ksi->ksi_pid; 237 1.1.2.2 yamt if (lsi->lsi_signo == LINUX32_SIGALRM || 238 1.1.2.2 yamt lsi->lsi_signo >= LINUX32_SIGRTMIN) 239 1.1.2.2 yamt lsi->lsi_value.sival_ptr = 240 1.1.2.2 yamt (netbsd32_voidp)(long)ksi->ksi_sigval.sival_ptr; 241 1.1.2.2 yamt break; 242 1.1.2.2 yamt } 243 1.1.2.2 yamt 244 1.1.2.2 yamt /* Save register context. */ 245 1.1.2.2 yamt linux32_save_ucontext(l, tf, mask, sas, &frame.sf_uc); 246 1.1.2.2 yamt 247 1.1.2.2 yamt if (copyout(&frame, fp, sizeof(frame)) != 0) { 248 1.1.2.2 yamt /* 249 1.1.2.2 yamt * Process has trashed its stack; give it an illegal 250 1.1.2.2 yamt * instruction to halt it in its tracks. 251 1.1.2.2 yamt */ 252 1.1.2.2 yamt sigexit(l, SIGILL); 253 1.1.2.2 yamt /* NOTREACHED */ 254 1.1.2.2 yamt } 255 1.1.2.2 yamt 256 1.1.2.2 yamt /* 257 1.1.2.2 yamt * Build context to run handler in. 258 1.1.2.2 yamt */ 259 1.1.2.2 yamt tf->tf_gs = GSEL(GUDATA32_SEL, SEL_UPL) & 0xffffffff; 260 1.1.2.2 yamt tf->tf_fs = GSEL(GUDATA32_SEL, SEL_UPL) & 0xffffffff; 261 1.1.2.2 yamt tf->tf_es = GSEL(GUDATA32_SEL, SEL_UPL) & 0xffffffff; 262 1.1.2.2 yamt tf->tf_ds = GSEL(GUDATA32_SEL, SEL_UPL) & 0xffffffff; 263 1.1.2.2 yamt tf->tf_rip = (((long)p->p_sigctx.ps_sigcode) + 264 1.1.2.2 yamt (linux32_rt_sigcode - linux32_sigcode)) & 0xffffffff; 265 1.1.2.2 yamt tf->tf_cs = GSEL(GUCODE32_SEL, SEL_UPL) & 0xffffffff; 266 1.1.2.2 yamt tf->tf_rflags &= ~(PSL_T|PSL_VM|PSL_AC) & 0xffffffff; 267 1.1.2.2 yamt tf->tf_rsp = (long)fp & 0xffffffff; 268 1.1.2.2 yamt tf->tf_ss = GSEL(GUDATA32_SEL, SEL_UPL) & 0xffffffff; 269 1.1.2.2 yamt 270 1.1.2.2 yamt /* Remember that we're now on the signal stack. */ 271 1.1.2.2 yamt if (onstack) 272 1.1.2.2 yamt sas->ss_flags |= SS_ONSTACK; 273 1.1.2.2 yamt 274 1.1.2.2 yamt return; 275 1.1.2.2 yamt } 276 1.1.2.2 yamt 277 1.1.2.2 yamt void 278 1.1.2.2 yamt linux32_setregs(struct lwp *l, struct exec_package *pack, u_long stack) 279 1.1.2.2 yamt { 280 1.1.2.2 yamt struct pcb *pcb = &l->l_addr->u_pcb; 281 1.1.2.2 yamt struct trapframe *tf; 282 1.1.2.2 yamt struct proc *p = l->l_proc; 283 1.1.2.2 yamt void **retaddr; 284 1.1.2.2 yamt 285 1.1.2.2 yamt /* If we were using the FPU, forget about it. */ 286 1.1.2.2 yamt if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 287 1.1.2.2 yamt fpusave_lwp(l, 0); 288 1.1.2.2 yamt 289 1.1.2.2 yamt #if defined(USER_LDT) && 0 290 1.1.2.2 yamt pmap_ldt_cleanup(p); 291 1.1.2.2 yamt #endif 292 1.1.2.2 yamt 293 1.1.2.2 yamt netbsd32_adjust_limits(p); 294 1.1.2.2 yamt 295 1.1.2.2 yamt l->l_md.md_flags &= ~MDP_USEDFPU; 296 1.1.2.2 yamt pcb->pcb_flags = 0; 297 1.1.2.2 yamt pcb->pcb_savefpu.fp_fxsave.fx_fcw = __Linux_NPXCW__; 298 1.1.2.2 yamt pcb->pcb_savefpu.fp_fxsave.fx_mxcsr = __INITIAL_MXCSR__; 299 1.1.2.2 yamt pcb->pcb_savefpu.fp_fxsave.fx_mxcsr_mask = __INITIAL_MXCSR_MASK__; 300 1.1.2.2 yamt pcb->pcb_fs = 0; 301 1.1.2.2 yamt pcb->pcb_gs = 0; 302 1.1.2.2 yamt 303 1.1.2.2 yamt 304 1.1.2.2 yamt l->l_proc->p_flag |= P_32; 305 1.1.2.2 yamt 306 1.1.2.2 yamt tf = l->l_md.md_regs; 307 1.1.2.2 yamt tf->tf_rax = 0; 308 1.1.2.2 yamt tf->tf_rbx = (u_int64_t)l->l_proc->p_psstr & 0xffffffff; 309 1.1.2.2 yamt tf->tf_rcx = pack->ep_entry & 0xffffffff; 310 1.1.2.2 yamt tf->tf_rdx = 0; 311 1.1.2.2 yamt tf->tf_rsi = 0; 312 1.1.2.2 yamt tf->tf_rdi = 0; 313 1.1.2.2 yamt tf->tf_rbp = 0; 314 1.1.2.2 yamt tf->tf_rsp = stack & 0xffffffff; 315 1.1.2.2 yamt tf->tf_r8 = 0; 316 1.1.2.2 yamt tf->tf_r9 = 0; 317 1.1.2.2 yamt tf->tf_r10 = 0; 318 1.1.2.2 yamt tf->tf_r11 = 0; 319 1.1.2.2 yamt tf->tf_r12 = 0; 320 1.1.2.2 yamt tf->tf_r13 = 0; 321 1.1.2.2 yamt tf->tf_r14 = 0; 322 1.1.2.2 yamt tf->tf_r15 = 0; 323 1.1.2.2 yamt tf->tf_rip = pack->ep_entry & 0xffffffff; 324 1.1.2.2 yamt tf->tf_rflags = PSL_USERSET; 325 1.1.2.2 yamt tf->tf_cs = GSEL(GUCODE32_SEL, SEL_UPL) & 0xffffffff; 326 1.1.2.2 yamt tf->tf_ss = GSEL(GUDATA32_SEL, SEL_UPL) & 0xffffffff; 327 1.1.2.2 yamt tf->tf_ds = GSEL(GUDATA32_SEL, SEL_UPL) & 0xffffffff; 328 1.1.2.2 yamt tf->tf_es = GSEL(GUDATA32_SEL, SEL_UPL) & 0xffffffff; 329 1.1.2.2 yamt tf->tf_fs = GSEL(GUDATA32_SEL, SEL_UPL) & 0xffffffff; 330 1.1.2.2 yamt tf->tf_gs = GSEL(GUDATA32_SEL, SEL_UPL) & 0xffffffff; 331 1.1.2.2 yamt 332 1.1.2.2 yamt /* XXX frob return address to return via old iret method, not sysret */ 333 1.1.2.2 yamt retaddr = (void **)tf - 1; 334 1.1.2.2 yamt *retaddr = (void *)osyscall_return; 335 1.1.2.2 yamt return; 336 1.1.2.2 yamt } 337 1.1.2.2 yamt 338 1.1.2.2 yamt static void 339 1.1.2.2 yamt linux32_save_ucontext(l, tf, mask, sas, uc) 340 1.1.2.2 yamt struct lwp *l; 341 1.1.2.2 yamt struct trapframe *tf; 342 1.1.2.2 yamt const sigset_t *mask; 343 1.1.2.2 yamt struct sigaltstack *sas; 344 1.1.2.2 yamt struct linux32_ucontext *uc; 345 1.1.2.2 yamt { 346 1.1.2.2 yamt uc->uc_flags = 0; 347 1.1.2.2 yamt uc->uc_link = (linux32_ucontextp_t)(long)NULL; 348 1.1.2.2 yamt native_to_linux32_sigaltstack(&uc->uc_stack, sas); 349 1.1.2.2 yamt linux32_save_sigcontext(l, tf, mask, &uc->uc_mcontext); 350 1.1.2.2 yamt native_to_linux32_sigset(&uc->uc_sigmask, mask); 351 1.1.2.2 yamt (void)memset(&uc->uc_fpregs_mem, 0, sizeof(uc->uc_fpregs_mem)); 352 1.1.2.2 yamt } 353 1.1.2.2 yamt 354 1.1.2.2 yamt static void 355 1.1.2.2 yamt linux32_save_sigcontext(l, tf, mask, sc) 356 1.1.2.2 yamt struct lwp *l; 357 1.1.2.2 yamt struct trapframe *tf; 358 1.1.2.2 yamt const sigset_t *mask; 359 1.1.2.2 yamt struct linux32_sigcontext *sc; 360 1.1.2.2 yamt { 361 1.1.2.2 yamt /* Save register context. */ 362 1.1.2.2 yamt sc->sc_gs = tf->tf_gs; 363 1.1.2.2 yamt sc->sc_fs = tf->tf_fs; 364 1.1.2.2 yamt sc->sc_es = tf->tf_es; 365 1.1.2.2 yamt sc->sc_ds = tf->tf_ds; 366 1.1.2.2 yamt sc->sc_eflags = tf->tf_rflags; 367 1.1.2.2 yamt sc->sc_edi = tf->tf_rdi; 368 1.1.2.2 yamt sc->sc_esi = tf->tf_rsi; 369 1.1.2.2 yamt sc->sc_esp = tf->tf_rsp; 370 1.1.2.2 yamt sc->sc_ebp = tf->tf_rbp; 371 1.1.2.2 yamt sc->sc_ebx = tf->tf_rbx; 372 1.1.2.2 yamt sc->sc_edx = tf->tf_rdx; 373 1.1.2.2 yamt sc->sc_ecx = tf->tf_rcx; 374 1.1.2.2 yamt sc->sc_eax = tf->tf_rax; 375 1.1.2.2 yamt sc->sc_eip = tf->tf_rip; 376 1.1.2.2 yamt sc->sc_cs = tf->tf_cs; 377 1.1.2.2 yamt sc->sc_esp_at_signal = tf->tf_rsp; 378 1.1.2.2 yamt sc->sc_ss = tf->tf_ss; 379 1.1.2.2 yamt sc->sc_err = tf->tf_err; 380 1.1.2.2 yamt sc->sc_trapno = tf->tf_trapno; 381 1.1.2.2 yamt /* sc->sc_cr2 = l->l_addr->u_pcb.pcb_cr2; */ /* XXX */ 382 1.1.2.2 yamt sc->sc_387 = (linux32_fpstatep_t)(long)NULL; 383 1.1.2.2 yamt 384 1.1.2.2 yamt /* Save signal stack. */ 385 1.1.2.2 yamt /* Linux doesn't save the onstack flag in sigframe */ 386 1.1.2.2 yamt 387 1.1.2.2 yamt /* Save signal mask. */ 388 1.1.2.2 yamt native_to_linux32_old_sigset(&sc->sc_mask, mask); 389 1.1.2.2 yamt } 390 1.1.2.2 yamt 391 1.1.2.2 yamt int 392 1.1.2.2 yamt linux32_sys_sigreturn(l, v, retval) 393 1.1.2.2 yamt struct lwp *l; 394 1.1.2.2 yamt void *v; 395 1.1.2.2 yamt register_t *retval; 396 1.1.2.2 yamt { 397 1.1.2.2 yamt struct linux32_sys_sigreturn_args /* { 398 1.1.2.2 yamt syscallarg(linux32_sigcontextp_t) scp; 399 1.1.2.2 yamt } */ *uap = v; 400 1.1.2.2 yamt struct linux32_sigcontext ctx; 401 1.1.2.2 yamt int error; 402 1.1.2.2 yamt 403 1.1.2.2 yamt if ((error = copyin(NETBSD32PTR64(SCARG(uap, scp)), 404 1.1.2.2 yamt &ctx, sizeof(ctx))) != 0) 405 1.1.2.2 yamt return error; 406 1.1.2.2 yamt 407 1.1.2.2 yamt return linux32_restore_sigcontext(l, &ctx, retval); 408 1.1.2.2 yamt } 409 1.1.2.2 yamt 410 1.1.2.2 yamt int 411 1.1.2.2 yamt linux32_sys_rt_sigreturn(l, v, retval) 412 1.1.2.2 yamt struct lwp *l; 413 1.1.2.2 yamt void *v; 414 1.1.2.2 yamt register_t *retval; 415 1.1.2.2 yamt { 416 1.1.2.2 yamt struct linux32_sys_rt_sigreturn_args /* { 417 1.1.2.2 yamt syscallarg(linux32_ucontextp_t) ucp; 418 1.1.2.2 yamt } */ *uap = v; 419 1.1.2.2 yamt struct linux32_ucontext ctx; 420 1.1.2.2 yamt int error; 421 1.1.2.2 yamt 422 1.1.2.2 yamt if ((error = copyin(NETBSD32PTR64(SCARG(uap, ucp)), 423 1.1.2.2 yamt &ctx, sizeof(ctx))) != 0) 424 1.1.2.2 yamt return error; 425 1.1.2.2 yamt 426 1.1.2.2 yamt return linux32_restore_sigcontext(l, &ctx.uc_mcontext, retval); 427 1.1.2.2 yamt } 428 1.1.2.2 yamt 429 1.1.2.2 yamt static int 430 1.1.2.2 yamt linux32_restore_sigcontext(l, scp, retval) 431 1.1.2.2 yamt struct lwp *l; 432 1.1.2.2 yamt struct linux32_sigcontext *scp; 433 1.1.2.2 yamt register_t *retval; 434 1.1.2.2 yamt { 435 1.1.2.2 yamt struct trapframe *tf; 436 1.1.2.2 yamt struct proc *p = l->l_proc; 437 1.1.2.2 yamt struct sigaltstack *sas = &p->p_sigctx.ps_sigstk; 438 1.1.2.2 yamt sigset_t mask; 439 1.1.2.2 yamt ssize_t ss_gap; 440 1.1.2.2 yamt 441 1.1.2.2 yamt /* Restore register context. */ 442 1.1.2.2 yamt tf = l->l_md.md_regs; 443 1.1.2.2 yamt 444 1.1.2.2 yamt /* 445 1.1.2.2 yamt * Check for security violations. If we're returning to 446 1.1.2.2 yamt * protected mode, the CPU will validate the segment registers 447 1.1.2.2 yamt * automatically and generate a trap on violations. We handle 448 1.1.2.2 yamt * the trap, rather than doing all of the checking here. 449 1.1.2.2 yamt */ 450 1.1.2.2 yamt if (((scp->sc_eflags ^ tf->tf_rflags) & PSL_USERSTATIC) != 0 || 451 1.1.2.2 yamt !USERMODE(scp->sc_cs, scp->sc_eflags)) 452 1.1.2.2 yamt return EINVAL; 453 1.1.2.2 yamt 454 1.1.2.2 yamt if (scp->sc_fs != 0 && !VALID_USER_DSEL32(scp->sc_fs)) 455 1.1.2.2 yamt return EINVAL; 456 1.1.2.2 yamt 457 1.1.2.2 yamt if (scp->sc_gs != 0 && !VALID_USER_DSEL32(scp->sc_gs)) 458 1.1.2.2 yamt return EINVAL; 459 1.1.2.2 yamt 460 1.1.2.2 yamt if (scp->sc_es != 0 && !VALID_USER_DSEL32(scp->sc_es)) 461 1.1.2.2 yamt return EINVAL; 462 1.1.2.2 yamt 463 1.1.2.2 yamt if (!VALID_USER_DSEL32(scp->sc_ds) || 464 1.1.2.2 yamt !VALID_USER_DSEL32(scp->sc_ss)) 465 1.1.2.2 yamt return EINVAL; 466 1.1.2.2 yamt 467 1.1.2.2 yamt if (scp->sc_eip >= VM_MAXUSER_ADDRESS32) 468 1.1.2.2 yamt return EINVAL; 469 1.1.2.2 yamt 470 1.1.2.2 yamt tf->tf_gs = (register_t)scp->sc_gs & 0xffffffff; 471 1.1.2.2 yamt tf->tf_fs = (register_t)scp->sc_fs & 0xffffffff; 472 1.1.2.2 yamt tf->tf_es = (register_t)scp->sc_es & 0xffffffff; 473 1.1.2.2 yamt tf->tf_ds = (register_t)scp->sc_ds & 0xffffffff; 474 1.1.2.2 yamt tf->tf_rflags &= ~PSL_USER; 475 1.1.2.2 yamt tf->tf_rflags |= ((register_t)scp->sc_eflags & PSL_USER); 476 1.1.2.2 yamt tf->tf_rdi = (register_t)scp->sc_edi & 0xffffffff; 477 1.1.2.2 yamt tf->tf_rsi = (register_t)scp->sc_esi & 0xffffffff; 478 1.1.2.2 yamt tf->tf_rbp = (register_t)scp->sc_ebp & 0xffffffff; 479 1.1.2.2 yamt tf->tf_rbx = (register_t)scp->sc_ebx & 0xffffffff; 480 1.1.2.2 yamt tf->tf_rdx = (register_t)scp->sc_edx & 0xffffffff; 481 1.1.2.2 yamt tf->tf_rcx = (register_t)scp->sc_ecx & 0xffffffff; 482 1.1.2.2 yamt tf->tf_rax = (register_t)scp->sc_eax & 0xffffffff; 483 1.1.2.2 yamt tf->tf_rip = (register_t)scp->sc_eip & 0xffffffff; 484 1.1.2.2 yamt tf->tf_cs = (register_t)scp->sc_cs & 0xffffffff; 485 1.1.2.2 yamt tf->tf_rsp = (register_t)scp->sc_esp_at_signal & 0xffffffff; 486 1.1.2.2 yamt tf->tf_ss = (register_t)scp->sc_ss & 0xffffffff; 487 1.1.2.2 yamt 488 1.1.2.2 yamt /* Restore signal stack. */ 489 1.1.2.2 yamt ss_gap = (ssize_t) 490 1.1.2.2 yamt ((caddr_t)NETBSD32PTR64(scp->sc_esp_at_signal) 491 1.1.2.2 yamt - (caddr_t)sas->ss_sp); 492 1.1.2.2 yamt if (ss_gap >= 0 && ss_gap < sas->ss_size) 493 1.1.2.2 yamt sas->ss_flags |= SS_ONSTACK; 494 1.1.2.2 yamt else 495 1.1.2.2 yamt sas->ss_flags &= ~SS_ONSTACK; 496 1.1.2.2 yamt 497 1.1.2.2 yamt /* Restore signal mask. */ 498 1.1.2.2 yamt linux32_old_to_native_sigset(&mask, &scp->sc_mask); 499 1.1.2.2 yamt (void) sigprocmask1(p, SIG_SETMASK, &mask, 0); 500 1.1.2.2 yamt #ifdef DEBUG_LINUX 501 1.1.2.2 yamt printf("linux32_sigreturn: rip = 0x%lx, rsp = 0x%lx, flags = 0x%lx\n", 502 1.1.2.2 yamt tf->tf_rip, tf->tf_rsp, tf->tf_rflags); 503 1.1.2.2 yamt #endif 504 1.1.2.2 yamt return EJUSTRETURN; 505 1.1.2.2 yamt } 506
Indexes created Tue Oct 21 19:09:51 GMT 2025