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Commit | Line | Data |
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1d3468a6 | 1 | /* |
ba180fd4 | 2 | * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
1da177e4 LT |
3 | * Licensed under the GPL |
4 | */ | |
5 | ||
ba180fd4 JD |
6 | #include "linux/stddef.h" |
7 | #include "linux/fs.h" | |
1da177e4 LT |
8 | #include "linux/smp_lock.h" |
9 | #include "linux/ptrace.h" | |
ba180fd4 | 10 | #include "linux/sched.h" |
5a0e3ad6 | 11 | #include "linux/slab.h" |
ba180fd4 JD |
12 | #include "asm/current.h" |
13 | #include "asm/processor.h" | |
1da177e4 | 14 | #include "asm/uaccess.h" |
54ae36f2 | 15 | #include "as-layout.h" |
1da177e4 | 16 | #include "mem_user.h" |
ba180fd4 | 17 | #include "skas.h" |
1da177e4 | 18 | #include "os.h" |
ff64b4c1 | 19 | #include "internal.h" |
1da177e4 LT |
20 | |
21 | void flush_thread(void) | |
22 | { | |
77bf4400 | 23 | void *data = NULL; |
77bf4400 JD |
24 | int ret; |
25 | ||
aa6758d4 | 26 | arch_flush_thread(¤t->thread.arch); |
77bf4400 | 27 | |
3963333f JD |
28 | ret = unmap(¤t->mm->context.id, 0, STUB_START, 0, &data); |
29 | ret = ret || unmap(¤t->mm->context.id, STUB_END, | |
536788fe | 30 | host_task_size - STUB_END, 1, &data); |
ba180fd4 JD |
31 | if (ret) { |
32 | printk(KERN_ERR "flush_thread - clearing address space failed, " | |
77bf4400 JD |
33 | "err = %d\n", ret); |
34 | force_sig(SIGKILL, current); | |
35 | } | |
36 | ||
6c738ffa | 37 | __switch_mm(¤t->mm->context.id); |
1da177e4 LT |
38 | } |
39 | ||
40 | void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp) | |
41 | { | |
77bf4400 JD |
42 | set_fs(USER_DS); |
43 | PT_REGS_IP(regs) = eip; | |
44 | PT_REGS_SP(regs) = esp; | |
1da177e4 LT |
45 | } |
46 | ||
1da177e4 | 47 | static long execve1(char *file, char __user * __user *argv, |
42947cb9 | 48 | char __user *__user *env) |
1da177e4 | 49 | { |
ba180fd4 | 50 | long error; |
1da177e4 | 51 | |
ba180fd4 JD |
52 | error = do_execve(file, argv, env, ¤t->thread.regs); |
53 | if (error == 0) { | |
1da177e4 | 54 | task_lock(current); |
ba180fd4 | 55 | current->ptrace &= ~PT_DTRACE; |
1d3468a6 JD |
56 | #ifdef SUBARCH_EXECVE1 |
57 | SUBARCH_EXECVE1(¤t->thread.regs.regs); | |
58 | #endif | |
1da177e4 | 59 | task_unlock(current); |
ba180fd4 JD |
60 | } |
61 | return error; | |
1da177e4 LT |
62 | } |
63 | ||
64 | long um_execve(char *file, char __user *__user *argv, char __user *__user *env) | |
65 | { | |
66 | long err; | |
67 | ||
68 | err = execve1(file, argv, env); | |
ba180fd4 | 69 | if (!err) |
fab95c55 | 70 | UML_LONGJMP(current->thread.exec_buf, 1); |
ba180fd4 | 71 | return err; |
1da177e4 LT |
72 | } |
73 | ||
4d338e1a | 74 | long sys_execve(char __user *file, char __user *__user *argv, |
1da177e4 LT |
75 | char __user *__user *env) |
76 | { | |
77 | long error; | |
78 | char *filename; | |
79 | ||
80 | lock_kernel(); | |
4d338e1a | 81 | filename = getname(file); |
1da177e4 LT |
82 | error = PTR_ERR(filename); |
83 | if (IS_ERR(filename)) goto out; | |
84 | error = execve1(filename, argv, env); | |
85 | putname(filename); | |
86 | out: | |
87 | unlock_kernel(); | |
ba180fd4 | 88 | return error; |
1da177e4 | 89 | } |