projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) | |
| 3 | * Licensed under the GPL | |
| 4 | */ | |
| 5 | ||
| 6 | #include "linux/kernel.h" | |
| 7 | #include "linux/mm.h" | |
| 8 | #include "asm/signal.h" | |
| 9 | #include "asm/ptrace.h" | |
| 10 | #include "asm/uaccess.h" | |
| 11 | #include "asm/pgalloc.h" | |
| 12 | #include "asm/tlbflush.h" | |
| 1da177e4 LT |
13 | #include "kern_util.h" |
| 14 | #include "irq_user.h" | |
| 1da177e4 LT |
15 | #include "mem_user.h" |
| 16 | #include "os.h" | |
| 17 | #include "tlb.h" | |
| 18 | #include "mode.h" | |
| 19 | ||
| 20 | static int exec_tramp(void *sig_stack) | |
| 21 | { | |
| 22 | init_new_thread_stack(sig_stack, NULL); | |
| e64bd134 | 23 | init_new_thread_signals(); |
| 1da177e4 LT |
24 | os_stop_process(os_getpid()); |
| 25 | return(0); | |
| 26 | } | |
| 27 | ||
| 28 | void flush_thread_tt(void) | |
| 29 | { | |
| 30 | unsigned long stack; | |
| 31 | int new_pid; | |
| 32 | ||
| 33 | stack = alloc_stack(0, 0); | |
| 34 | if(stack == 0){ | |
| 35 | printk(KERN_ERR | |
| 36 | "flush_thread : failed to allocate temporary stack\n"); | |
| 37 | do_exit(SIGKILL); | |
| 38 | } | |
| 39 | ||
| 579b3ea5 | 40 | new_pid = start_fork_tramp(task_stack_page(current), stack, 0, exec_tramp); |
| 1da177e4 LT |
41 | if(new_pid < 0){ |
| 42 | printk(KERN_ERR | |
| 43 | "flush_thread : new thread failed, errno = %d\n", | |
| 44 | -new_pid); | |
| 45 | do_exit(SIGKILL); | |
| 46 | } | |
| 47 | ||
| 48 | if(current_thread->cpu == 0) | |
| 49 | forward_interrupts(new_pid); | |
| 50 | current->thread.request.op = OP_EXEC; | |
| 51 | current->thread.request.u.exec.pid = new_pid; | |
| 52 | unprotect_stack((unsigned long) current_thread); | |
| 53 | os_usr1_process(os_getpid()); | |
| 54 | change_sig(SIGUSR1, 1); | |
| 55 | ||
| 56 | change_sig(SIGUSR1, 0); | |
| 57 | enable_timer(); | |
| 58 | free_page(stack); | |
| 59 | protect_memory(uml_reserved, high_physmem - uml_reserved, 1, 1, 0, 1); | |
| 57598fd7 | 60 | stack_protections((unsigned long) current_thread); |
| 1da177e4 LT |
61 | force_flush_all(); |
| 62 | unblock_signals(); | |
| 63 | } | |
| 64 | ||
| 65 | void start_thread_tt(struct pt_regs *regs, unsigned long eip, | |
| 66 | unsigned long esp) | |
| 67 | { | |
| 68 | set_fs(USER_DS); | |
| 69 | flush_tlb_mm(current->mm); | |
| 70 | PT_REGS_IP(regs) = eip; | |
| 71 | PT_REGS_SP(regs) = esp; | |
| 72 | PT_FIX_EXEC_STACK(esp); | |
| 73 | } | |
| 74 | ||
| 75 | /* | |
| 76 | * Overrides for Emacs so that we follow Linus's tabbing style. | |
| 77 | * Emacs will notice this stuff at the end of the file and automatically | |
| 78 | * adjust the settings for this buffer only. This must remain at the end | |
| 79 | * of the file. | |
| 80 | * --------------------------------------------------------------------------- | |
| 81 | * Local variables: | |
| 82 | * c-file-style: "linux" | |
| 83 | * End: | |
| 84 | */ |