diff options
Diffstat (limited to 'arch/um/kernel/skas/process_kern.c')
| -rw-r--r-- | arch/um/kernel/skas/process_kern.c | 232 |
1 files changed, 0 insertions, 232 deletions
diff --git a/arch/um/kernel/skas/process_kern.c b/arch/um/kernel/skas/process_kern.c deleted file mode 100644 index 9c990253966..00000000000 --- a/arch/um/kernel/skas/process_kern.c +++ /dev/null @@ -1,232 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include "linux/sched.h" -#include "linux/slab.h" -#include "linux/ptrace.h" -#include "linux/proc_fs.h" -#include "linux/file.h" -#include "linux/errno.h" -#include "linux/init.h" -#include "asm/uaccess.h" -#include "asm/atomic.h" -#include "kern_util.h" -#include "time_user.h" -#include "signal_user.h" -#include "skas.h" -#include "os.h" -#include "user_util.h" -#include "tlb.h" -#include "kern.h" -#include "mode.h" -#include "proc_mm.h" -#include "registers.h" - -void switch_to_skas(void *prev, void *next) -{ - struct task_struct *from, *to; - - from = prev; - to = next; - - /* XXX need to check runqueues[cpu].idle */ - if(current->pid == 0) - switch_timers(0); - - switch_threads(&from->thread.mode.skas.switch_buf, - to->thread.mode.skas.switch_buf); - - if(current->pid == 0) - switch_timers(1); -} - -extern void schedule_tail(struct task_struct *prev); - -void new_thread_handler(int sig) -{ - int (*fn)(void *), n; - void *arg; - - fn = current->thread.request.u.thread.proc; - arg = current->thread.request.u.thread.arg; - change_sig(SIGUSR1, 1); - thread_wait(¤t->thread.mode.skas.switch_buf, - current->thread.mode.skas.fork_buf); - - if(current->thread.prev_sched != NULL) - schedule_tail(current->thread.prev_sched); - current->thread.prev_sched = NULL; - - /* The return value is 1 if the kernel thread execs a process, - * 0 if it just exits - */ - n = run_kernel_thread(fn, arg, ¤t->thread.exec_buf); - if(n == 1){ - /* Handle any immediate reschedules or signals */ - interrupt_end(); - userspace(¤t->thread.regs.regs); - } - else do_exit(0); -} - -void new_thread_proc(void *stack, void (*handler)(int sig)) -{ - init_new_thread_stack(stack, handler); - os_usr1_process(os_getpid()); -} - -void release_thread_skas(struct task_struct *task) -{ -} - -void fork_handler(int sig) -{ - change_sig(SIGUSR1, 1); - thread_wait(¤t->thread.mode.skas.switch_buf, - current->thread.mode.skas.fork_buf); - - force_flush_all(); - if(current->thread.prev_sched == NULL) - panic("blech"); - - schedule_tail(current->thread.prev_sched); - current->thread.prev_sched = NULL; - - /* Handle any immediate reschedules or signals */ - interrupt_end(); - userspace(¤t->thread.regs.regs); -} - -int copy_thread_skas(int nr, unsigned long clone_flags, unsigned long sp, - unsigned long stack_top, struct task_struct * p, - struct pt_regs *regs) -{ - void (*handler)(int); - - if(current->thread.forking){ - memcpy(&p->thread.regs.regs.skas, ®s->regs.skas, - sizeof(p->thread.regs.regs.skas)); - REGS_SET_SYSCALL_RETURN(p->thread.regs.regs.skas.regs, 0); - if(sp != 0) REGS_SP(p->thread.regs.regs.skas.regs) = sp; - - handler = fork_handler; - } - else { - init_thread_registers(&p->thread.regs.regs); - p->thread.request.u.thread = current->thread.request.u.thread; - handler = new_thread_handler; - } - - new_thread(p->thread_info, &p->thread.mode.skas.switch_buf, - &p->thread.mode.skas.fork_buf, handler); - return(0); -} - -extern void map_stub_pages(int fd, unsigned long code, - unsigned long data, unsigned long stack); -int new_mm(int from, unsigned long stack) -{ - struct proc_mm_op copy; - int n, fd; - - fd = os_open_file("/proc/mm", of_cloexec(of_write(OPENFLAGS())), 0); - if(fd < 0) - return(fd); - - if(from != -1){ - copy = ((struct proc_mm_op) { .op = MM_COPY_SEGMENTS, - .u = - { .copy_segments = from } } ); - n = os_write_file(fd, ©, sizeof(copy)); - if(n != sizeof(copy)) - printk("new_mm : /proc/mm copy_segments failed, " - "err = %d\n", -n); - } - - if(skas_needs_stub) - map_stub_pages(fd, CONFIG_STUB_CODE, CONFIG_STUB_DATA, stack); - - return(fd); -} - -void init_idle_skas(void) -{ - cpu_tasks[current_thread->cpu].pid = os_getpid(); - default_idle(); -} - -extern void start_kernel(void); - -static int start_kernel_proc(void *unused) -{ - int pid; - - block_signals(); - pid = os_getpid(); - - cpu_tasks[0].pid = pid; - cpu_tasks[0].task = current; -#ifdef CONFIG_SMP - cpu_online_map = cpumask_of_cpu(0); -#endif - start_kernel(); - return(0); -} - -extern int userspace_pid[]; - -int start_uml_skas(void) -{ - if(proc_mm) - userspace_pid[0] = start_userspace(0); - - init_new_thread_signals(1); - - init_task.thread.request.u.thread.proc = start_kernel_proc; - init_task.thread.request.u.thread.arg = NULL; - return(start_idle_thread(init_task.thread_info, - &init_task.thread.mode.skas.switch_buf, - &init_task.thread.mode.skas.fork_buf)); -} - -int external_pid_skas(struct task_struct *task) -{ -#warning Need to look up userspace_pid by cpu - return(userspace_pid[0]); -} - -int thread_pid_skas(struct task_struct *task) -{ -#warning Need to look up userspace_pid by cpu - return(userspace_pid[0]); -} - -void kill_off_processes_skas(void) -{ - if(proc_mm) -#warning need to loop over userspace_pids in kill_off_processes_skas - os_kill_ptraced_process(userspace_pid[0], 1); - else { - struct task_struct *p; - int pid, me; - - me = os_getpid(); - for_each_process(p){ - if(p->mm == NULL) - continue; - - pid = p->mm->context.skas.id.u.pid; - os_kill_ptraced_process(pid, 1); - } - } -} - -unsigned long current_stub_stack(void) -{ - if(current->mm == NULL) - return(0); - - return(current->mm->context.skas.id.stack); -} |