25 int is_skas_winch(int pid, int fd, void *data)  in is_skas_winch()  argument
27 	return pid == getpgrp();  in is_skas_winch()
30 static int ptrace_dump_regs(int pid)  in ptrace_dump_regs()  argument
35 	if (ptrace(PTRACE_GETREGS, pid, 0, regs) < 0)  in ptrace_dump_regs()
54 void wait_stub_done(int pid)  in wait_stub_done()  argument
59 		CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED | __WALL));  in wait_stub_done()
66 		err = ptrace(PTRACE_CONT, pid, 0, 0);  in wait_stub_done()
78 	err = ptrace_dump_regs(pid);  in wait_stub_done()
83 	       "pid = %d, n = %d, errno = %d, status = 0x%x\n", pid, n, errno,  in wait_stub_done()
90 static void get_skas_faultinfo(int pid, struct faultinfo *fi)  in get_skas_faultinfo()  argument
95 	err = get_fp_registers(pid, fpregs);  in get_skas_faultinfo()
101 	err = ptrace(PTRACE_CONT, pid, 0, SIGSEGV);  in get_skas_faultinfo()
104 		       "errno = %d\n", pid, errno);  in get_skas_faultinfo()
107 	wait_stub_done(pid);  in get_skas_faultinfo()
115 	err = put_fp_registers(pid, fpregs);  in get_skas_faultinfo()
123 static void handle_segv(int pid, struct uml_pt_regs * regs)  in handle_segv()  argument
125 	get_skas_faultinfo(pid, &regs->faultinfo);  in handle_segv()
133 static void handle_trap(int pid, struct uml_pt_regs *regs,  in handle_trap()  argument
143 		err = ptrace(PTRACE_POKEUSER, pid, PT_SYSCALL_NR_OFFSET,  in handle_trap()
151 		err = ptrace(PTRACE_SYSCALL, pid, 0, 0);  in handle_trap()
158 		CATCH_EINTR(err = waitpid(pid, &status, WUNTRACED | __WALL));  in handle_trap()
161 			err = ptrace_dump_regs(pid);  in handle_trap()
252 	int pid, status, n, flags, err;  in start_userspace()  local
268 	pid = clone(userspace_tramp, (void *) sp, flags, (void *) stub_stack);  in start_userspace()
269 	if (pid < 0) {  in start_userspace()
277 		CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED | __WALL));  in start_userspace()
293 	if (ptrace(PTRACE_OLDSETOPTIONS, pid, NULL,  in start_userspace()
308 	return pid;  in start_userspace()
311 	os_kill_ptraced_process(pid, 1);  in start_userspace()
317 	int err, status, op, pid = userspace_pid[0];  in userspace()  local
335 		if (ptrace(PTRACE_SETREGS, pid, 0, regs->gp))  in userspace()
338 		if (put_fp_registers(pid, regs->fp))  in userspace()
347 		if (ptrace(op, pid, 0, 0)) {  in userspace()
353 		CATCH_EINTR(err = waitpid(pid, &status, WUNTRACED | __WALL));  in userspace()
361 		if (ptrace(PTRACE_GETREGS, pid, 0, regs->gp)) {  in userspace()
367 		if (get_fp_registers(pid, regs->fp)) {  in userspace()
378 			ptrace(PTRACE_GETSIGINFO, pid, 0, (struct siginfo *)&si);  in userspace()
383 					get_skas_faultinfo(pid,  in userspace()
388 				else handle_segv(pid, regs);  in userspace()
391 			        handle_trap(pid, regs, local_using_sysemu);  in userspace()
412 			pid = userspace_pid[0];  in userspace()
442 int copy_context_skas0(unsigned long new_stack, int pid)  in copy_context_skas0()  argument
460 	err = ptrace_setregs(pid, thread_regs);  in copy_context_skas0()
464 		       "failed, pid = %d, errno = %d\n", pid, -err);  in copy_context_skas0()
468 	err = put_fp_registers(pid, thread_fp_regs);  in copy_context_skas0()
471 		       "failed, pid = %d, err = %d\n", pid, err);  in copy_context_skas0()
482 	err = ptrace(PTRACE_CONT, pid, 0, 0);  in copy_context_skas0()
486 		       "errno = %d\n", pid, errno);  in copy_context_skas0()
490 	wait_stub_done(pid);  in copy_context_skas0()
492 	pid = data->err;  in copy_context_skas0()
493 	if (pid < 0) {  in copy_context_skas0()
495 		       "error %d\n", -pid);  in copy_context_skas0()
496 		return pid;  in copy_context_skas0()
503 	wait_stub_done(pid);  in copy_context_skas0()
511 	if (ptrace(PTRACE_OLDSETOPTIONS, pid, NULL,  in copy_context_skas0()
519 	return pid;  in copy_context_skas0()
522 	os_kill_ptraced_process(pid, 1);  in copy_context_skas0()
622 	userspace_pid[0] = mm_idp->u.pid;  in __switch_mm()