27 int is_skas_winch(int pid, int fd, void *data)  in is_skas_winch()  argument
29 	return pid == getpgrp();  in is_skas_winch()
80 static int ptrace_dump_regs(int pid)  in ptrace_dump_regs()  argument
85 	if (ptrace(PTRACE_GETREGS, pid, 0, regs) < 0)  in ptrace_dump_regs()
107 void wait_stub_done(int pid)  in wait_stub_done()  argument
112 		CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED | __WALL));  in wait_stub_done()
119 		err = ptrace(PTRACE_CONT, pid, 0, 0);  in wait_stub_done()
131 	err = ptrace_dump_regs(pid);  in wait_stub_done()
135 …printk(UM_KERN_ERR "%s : failed to wait for SIGTRAP, pid = %d, n = %d, errno = %d, status = 0x%x\n…  in wait_stub_done()
136 	       __func__, pid, n, errno, status);  in wait_stub_done()
142 static void get_skas_faultinfo(int pid, struct faultinfo *fi, unsigned long *aux_fp_regs)  in get_skas_faultinfo()  argument
146 	err = get_fp_registers(pid, aux_fp_regs);  in get_skas_faultinfo()
152 	err = ptrace(PTRACE_CONT, pid, 0, SIGSEGV);  in get_skas_faultinfo()
154 		printk(UM_KERN_ERR "Failed to continue stub, pid = %d, "  in get_skas_faultinfo()
155 		       "errno = %d\n", pid, errno);  in get_skas_faultinfo()
158 	wait_stub_done(pid);  in get_skas_faultinfo()
166 	err = put_fp_registers(pid, aux_fp_regs);  in get_skas_faultinfo()
174 static void handle_segv(int pid, struct uml_pt_regs *regs, unsigned long *aux_fp_regs)  in handle_segv()  argument
176 	get_skas_faultinfo(pid, &regs->faultinfo, aux_fp_regs);  in handle_segv()
180 static void handle_trap(int pid, struct uml_pt_regs *regs)  in handle_trap()  argument
272 	int pid, status, n, flags, err;  in start_userspace()  local
291 	pid = clone(userspace_tramp, (void *) sp, flags, (void *) stub_stack);  in start_userspace()
292 	if (pid < 0) {  in start_userspace()
300 		CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED | __WALL));  in start_userspace()
316 	if (ptrace(PTRACE_SETOPTIONS, pid, NULL,  in start_userspace()
331 	return pid;  in start_userspace()
334 	os_kill_ptraced_process(pid, 1);  in start_userspace()
340 	int err, status, op, pid = userspace_pid[0];  in userspace()  local
358 		if (ptrace(PTRACE_SETREGS, pid, 0, regs->gp)) {  in userspace()
364 		if (put_fp_registers(pid, regs->fp)) {  in userspace()
375 		if (ptrace(op, pid, 0, 0)) {  in userspace()
381 		CATCH_EINTR(err = waitpid(pid, &status, WUNTRACED | __WALL));  in userspace()
389 		if (ptrace(PTRACE_GETREGS, pid, 0, regs->gp)) {  in userspace()
395 		if (get_fp_registers(pid, regs->fp)) {  in userspace()
417 				ptrace(PTRACE_GETSIGINFO, pid, 0, (struct siginfo *)&si);  in userspace()
424 					get_skas_faultinfo(pid,  in userspace()
429 				else handle_segv(pid, regs, aux_fp_regs);  in userspace()
432 				handle_trap(pid, regs);  in userspace()
453 			pid = userspace_pid[0];  in userspace()
483 int copy_context_skas0(unsigned long new_stack, int pid)  in copy_context_skas0()  argument
507 	err = ptrace_setregs(pid, thread_regs);  in copy_context_skas0()
510 		printk(UM_KERN_ERR "%s : PTRACE_SETREGS failed, pid = %d, errno = %d\n",  in copy_context_skas0()
511 		      __func__, pid, -err);  in copy_context_skas0()
515 	err = put_fp_registers(pid, thread_fp_regs);  in copy_context_skas0()
517 		printk(UM_KERN_ERR "%s : put_fp_registers failed, pid = %d, err = %d\n",  in copy_context_skas0()
518 		       __func__, pid, err);  in copy_context_skas0()
523 	 * Wait, until parent has finished its work: read child's pid from  in copy_context_skas0()
526 	err = ptrace(PTRACE_CONT, pid, 0, 0);  in copy_context_skas0()
529 		printk(UM_KERN_ERR "Failed to continue new process, pid = %d, errno = %d\n",  in copy_context_skas0()
530 		       pid, errno);  in copy_context_skas0()
534 	wait_stub_done(pid);  in copy_context_skas0()
536 	pid = data->parent_err;  in copy_context_skas0()
537 	if (pid < 0) {  in copy_context_skas0()
539 		      __func__, -pid);  in copy_context_skas0()
540 		return pid;  in copy_context_skas0()
547 	wait_stub_done(pid);  in copy_context_skas0()
550 		       __func__, pid, data->child_err);  in copy_context_skas0()
555 	if (ptrace(PTRACE_SETOPTIONS, pid, NULL,  in copy_context_skas0()
563 	return pid;  in copy_context_skas0()
566 	os_kill_ptraced_process(pid, 1);  in copy_context_skas0()
685 	userspace_pid[0] = mm_idp->u.pid;  in __switch_mm()