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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) | |
3 | * Licensed under the GPL | |
4 | */ | |
5 | ||
6 | #include <stdio.h> | |
7 | #include <stdlib.h> | |
8 | #include <unistd.h> | |
9 | #include <limits.h> | |
10 | #include <setjmp.h> | |
11 | #include <sys/mman.h> | |
12 | #include <sys/stat.h> | |
13 | #include <sys/utsname.h> | |
14 | #include <sys/param.h> | |
15 | #include <sys/time.h> | |
16 | #include "asm/types.h" | |
17 | #include <ctype.h> | |
18 | #include <signal.h> | |
19 | #include <wait.h> | |
20 | #include <errno.h> | |
21 | #include <stdarg.h> | |
22 | #include <sched.h> | |
23 | #include <termios.h> | |
24 | #include <string.h> | |
25 | #include "user_util.h" | |
26 | #include "kern_util.h" | |
27 | #include "user.h" | |
28 | #include "mem_user.h" | |
29 | #include "init.h" | |
30 | #include "helper.h" | |
31 | #include "ptrace_user.h" | |
32 | #include "uml-config.h" | |
33 | ||
34 | void stop(void) | |
35 | { | |
36 | while(1) sleep(1000000); | |
37 | } | |
38 | ||
39 | void stack_protections(unsigned long address) | |
40 | { | |
41 | int prot = PROT_READ | PROT_WRITE | PROT_EXEC; | |
42 | ||
43 | if(mprotect((void *) address, page_size(), prot) < 0) | |
44 | panic("protecting stack failed, errno = %d", errno); | |
45 | } | |
46 | ||
47 | void task_protections(unsigned long address) | |
48 | { | |
49 | unsigned long guard = address + page_size(); | |
50 | unsigned long stack = guard + page_size(); | |
51 | int prot = 0, pages; | |
52 | ||
53 | #ifdef notdef | |
54 | if(mprotect((void *) stack, page_size(), prot) < 0) | |
55 | panic("protecting guard page failed, errno = %d", errno); | |
56 | #endif | |
57 | pages = (1 << UML_CONFIG_KERNEL_STACK_ORDER) - 2; | |
58 | prot = PROT_READ | PROT_WRITE | PROT_EXEC; | |
59 | if(mprotect((void *) stack, pages * page_size(), prot) < 0) | |
60 | panic("protecting stack failed, errno = %d", errno); | |
61 | } | |
62 | ||
63 | int wait_for_stop(int pid, int sig, int cont_type, void *relay) | |
64 | { | |
65 | sigset_t *relay_signals = relay; | |
66 | int status, ret; | |
67 | ||
68 | while(1){ | |
69 | CATCH_EINTR(ret = waitpid(pid, &status, WUNTRACED)); | |
70 | if((ret < 0) || | |
71 | !WIFSTOPPED(status) || (WSTOPSIG(status) != sig)){ | |
72 | if(ret < 0){ | |
73 | printk("wait failed, errno = %d\n", | |
74 | errno); | |
75 | } | |
76 | else if(WIFEXITED(status)) | |
77 | printk("process %d exited with status %d\n", | |
78 | pid, WEXITSTATUS(status)); | |
79 | else if(WIFSIGNALED(status)) | |
80 | printk("process %d exited with signal %d\n", | |
81 | pid, WTERMSIG(status)); | |
82 | else if((WSTOPSIG(status) == SIGVTALRM) || | |
83 | (WSTOPSIG(status) == SIGALRM) || | |
84 | (WSTOPSIG(status) == SIGIO) || | |
85 | (WSTOPSIG(status) == SIGPROF) || | |
86 | (WSTOPSIG(status) == SIGCHLD) || | |
87 | (WSTOPSIG(status) == SIGWINCH) || | |
88 | (WSTOPSIG(status) == SIGINT)){ | |
89 | ptrace(cont_type, pid, 0, WSTOPSIG(status)); | |
90 | continue; | |
91 | } | |
92 | else if((relay_signals != NULL) && | |
93 | sigismember(relay_signals, WSTOPSIG(status))){ | |
94 | ptrace(cont_type, pid, 0, WSTOPSIG(status)); | |
95 | continue; | |
96 | } | |
97 | else printk("process %d stopped with signal %d\n", | |
98 | pid, WSTOPSIG(status)); | |
99 | panic("wait_for_stop failed to wait for %d to stop " | |
100 | "with %d\n", pid, sig); | |
101 | } | |
102 | return(status); | |
103 | } | |
104 | } | |
105 | ||
106 | int raw(int fd) | |
107 | { | |
108 | struct termios tt; | |
109 | int err; | |
110 | ||
111 | CATCH_EINTR(err = tcgetattr(fd, &tt)); | |
112 | if (err < 0) { | |
113 | printk("tcgetattr failed, errno = %d\n", errno); | |
114 | return(-errno); | |
115 | } | |
116 | ||
117 | cfmakeraw(&tt); | |
118 | ||
119 | CATCH_EINTR(err = tcsetattr(fd, TCSADRAIN, &tt)); | |
120 | if (err < 0) { | |
121 | printk("tcsetattr failed, errno = %d\n", errno); | |
122 | return(-errno); | |
123 | } | |
124 | ||
125 | /* XXX tcsetattr could have applied only some changes | |
126 | * (and cfmakeraw() is a set of changes) */ | |
127 | return(0); | |
128 | } | |
129 | ||
130 | void setup_machinename(char *machine_out) | |
131 | { | |
132 | struct utsname host; | |
133 | ||
134 | uname(&host); | |
135 | strcpy(machine_out, host.machine); | |
136 | } | |
137 | ||
138 | char host_info[(_UTSNAME_LENGTH + 1) * 4 + _UTSNAME_NODENAME_LENGTH + 1]; | |
139 | ||
140 | void setup_hostinfo(void) | |
141 | { | |
142 | struct utsname host; | |
143 | ||
144 | uname(&host); | |
145 | sprintf(host_info, "%s %s %s %s %s", host.sysname, host.nodename, | |
146 | host.release, host.version, host.machine); | |
147 | } | |
148 | ||
149 | int setjmp_wrapper(void (*proc)(void *, void *), ...) | |
150 | { | |
151 | va_list args; | |
152 | sigjmp_buf buf; | |
153 | int n; | |
154 | ||
155 | n = sigsetjmp(buf, 1); | |
156 | if(n == 0){ | |
157 | va_start(args, proc); | |
158 | (*proc)(&buf, &args); | |
159 | } | |
160 | va_end(args); | |
161 | return(n); | |
162 | } | |
163 | ||
164 | /* | |
165 | * Overrides for Emacs so that we follow Linus's tabbing style. | |
166 | * Emacs will notice this stuff at the end of the file and automatically | |
167 | * adjust the settings for this buffer only. This must remain at the end | |
168 | * of the file. | |
169 | * --------------------------------------------------------------------------- | |
170 | * Local variables: | |
171 | * c-file-style: "linux" | |
172 | * End: | |
173 | */ |