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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /arch/um/kernel/skas/process.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'arch/um/kernel/skas/process.c')
-rw-r--r-- | arch/um/kernel/skas/process.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c new file mode 100644 index 00000000..0a9e57e7 --- /dev/null +++ b/arch/um/kernel/skas/process.c @@ -0,0 +1,81 @@ +/* + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) + * Licensed under the GPL + */ + +#include "linux/init.h" +#include "linux/sched.h" +#include "as-layout.h" +#include "kern.h" +#include "os.h" +#include "skas.h" + +int new_mm(unsigned long stack) +{ + int fd, err; + + fd = os_open_file("/proc/mm", of_cloexec(of_write(OPENFLAGS())), 0); + if (fd < 0) + return fd; + + if (skas_needs_stub) { + err = map_stub_pages(fd, STUB_CODE, STUB_DATA, stack); + if (err) { + os_close_file(fd); + return err; + } + } + + return fd; +} + +extern void start_kernel(void); + +static int __init 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 + init_cpu_online(get_cpu_mask(0)); +#endif + start_kernel(); + return 0; +} + +extern int userspace_pid[]; + +extern char cpu0_irqstack[]; + +int __init start_uml(void) +{ + stack_protections((unsigned long) &cpu0_irqstack); + set_sigstack(cpu0_irqstack, THREAD_SIZE); + if (proc_mm) { + userspace_pid[0] = start_userspace(0); + if (userspace_pid[0] < 0) { + printf("start_uml - start_userspace returned %d\n", + userspace_pid[0]); + exit(1); + } + } + + init_new_thread_signals(); + + init_task.thread.request.u.thread.proc = start_kernel_proc; + init_task.thread.request.u.thread.arg = NULL; + return start_idle_thread(task_stack_page(&init_task), + &init_task.thread.switch_buf); +} + +unsigned long current_stub_stack(void) +{ + if (current->mm == NULL) + return 0; + + return current->mm->context.id.stack; +} |