24 int is_skas_winch(int pid, int fd, void *data)  in is_skas_winch()  argument
26 	return pid == getpgrp();  in is_skas_winch()
29 static int ptrace_dump_regs(int pid)  in ptrace_dump_regs()  argument
34 	if (ptrace(PTRACE_GETREGS, pid, 0, regs) < 0)  in ptrace_dump_regs()
53 void wait_stub_done(int pid)  in wait_stub_done()  argument
58 		CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED | __WALL));  in wait_stub_done()
65 		err = ptrace(PTRACE_CONT, pid, 0, 0);  in wait_stub_done()
77 	err = ptrace_dump_regs(pid);  in wait_stub_done()
82 	       "pid = %d, n = %d, errno = %d, status = 0x%x\n", pid, n, errno,  in wait_stub_done()
89 static void get_skas_faultinfo(int pid, struct faultinfo *fi)  in get_skas_faultinfo()  argument
94 	err = get_fp_registers(pid, fpregs);  in get_skas_faultinfo()
100 	err = ptrace(PTRACE_CONT, pid, 0, SIGSEGV);  in get_skas_faultinfo()
103 		       "errno = %d\n", pid, errno);  in get_skas_faultinfo()
106 	wait_stub_done(pid);  in get_skas_faultinfo()
114 	err = put_fp_registers(pid, fpregs);  in get_skas_faultinfo()
122 static void handle_segv(int pid, struct uml_pt_regs * regs)  in handle_segv()  argument
124 	get_skas_faultinfo(pid, &regs->faultinfo);  in handle_segv()
132 static void handle_trap(int pid, struct uml_pt_regs *regs,  in handle_trap()  argument
145 		err = ptrace(PTRACE_POKEUSER, pid, PT_SYSCALL_NR_OFFSET,  in handle_trap()
153 		err = ptrace(PTRACE_SYSCALL, pid, 0, 0);  in handle_trap()
160 		CATCH_EINTR(err = waitpid(pid, &status, WUNTRACED | __WALL));  in handle_trap()
163 			err = ptrace_dump_regs(pid);  in handle_trap()
253 	int pid, status, n, flags, err;  in start_userspace()  local
269 	pid = clone(userspace_tramp, (void *) sp, flags, (void *) stub_stack);  in start_userspace()
270 	if (pid < 0) {  in start_userspace()
278 		CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED | __WALL));  in start_userspace()
294 	if (ptrace(PTRACE_OLDSETOPTIONS, pid, NULL,  in start_userspace()
309 	return pid;  in start_userspace()
312 	os_kill_ptraced_process(pid, 1);  in start_userspace()
320 	int err, status, op, pid = userspace_pid[0];  in userspace()  local
343 		if (ptrace(PTRACE_SETREGS, pid, 0, regs->gp))  in userspace()
346 		if (put_fp_registers(pid, regs->fp))  in userspace()
355 		if (ptrace(op, pid, 0, 0)) {  in userspace()
361 		CATCH_EINTR(err = waitpid(pid, &status, WUNTRACED | __WALL));  in userspace()
369 		if (ptrace(PTRACE_GETREGS, pid, 0, regs->gp)) {  in userspace()
375 		if (get_fp_registers(pid, regs->fp)) {  in userspace()
386 			ptrace(PTRACE_GETSIGINFO, pid, 0, (struct siginfo *)&si);  in userspace()
391 					get_skas_faultinfo(pid,  in userspace()
396 				else handle_segv(pid, regs);  in userspace()
399 			        handle_trap(pid, regs, local_using_sysemu);  in userspace()
431 			pid = userspace_pid[0];  in userspace()
461 int copy_context_skas0(unsigned long new_stack, int pid)  in copy_context_skas0()  argument
481 	err = ptrace_setregs(pid, thread_regs);  in copy_context_skas0()
485 		       "failed, pid = %d, errno = %d\n", pid, -err);  in copy_context_skas0()
489 	err = put_fp_registers(pid, thread_fp_regs);  in copy_context_skas0()
492 		       "failed, pid = %d, err = %d\n", pid, err);  in copy_context_skas0()
503 	err = ptrace(PTRACE_CONT, pid, 0, 0);  in copy_context_skas0()
507 		       "errno = %d\n", pid, errno);  in copy_context_skas0()
511 	wait_stub_done(pid);  in copy_context_skas0()
513 	pid = data->err;  in copy_context_skas0()
514 	if (pid < 0) {  in copy_context_skas0()
516 		       "error %d\n", -pid);  in copy_context_skas0()
517 		return pid;  in copy_context_skas0()
524 	wait_stub_done(pid);  in copy_context_skas0()
532 	if (ptrace(PTRACE_OLDSETOPTIONS, pid, NULL,  in copy_context_skas0()
540 	return pid;  in copy_context_skas0()
543 	os_kill_ptraced_process(pid, 1);  in copy_context_skas0()
643 	userspace_pid[0] = mm_idp->u.pid;  in __switch_mm()