aboutsummaryrefslogtreecommitdiffstats
path: root/arch
diff options
context:
space:
mode:
Diffstat (limited to 'arch')
-rw-r--r--arch/um/os-Linux/tt.c195
1 files changed, 0 insertions, 195 deletions
diff --git a/arch/um/os-Linux/tt.c b/arch/um/os-Linux/tt.c
deleted file mode 100644
index 5dc113d3296f..000000000000
--- a/arch/um/os-Linux/tt.c
+++ /dev/null
@@ -1,195 +0,0 @@
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 <unistd.h>
8#include <signal.h>
9#include <sched.h>
10#include <errno.h>
11#include <stdarg.h>
12#include <stdlib.h>
13#include <sys/time.h>
14#include <sys/ptrace.h>
15#include <linux/ptrace.h>
16#include <sys/wait.h>
17#include <sys/mman.h>
18#include <asm/ptrace.h>
19#include <asm/unistd.h>
20#include "kern_util.h"
21#include "user.h"
22#include "signal_kern.h"
23#include "sysdep/ptrace.h"
24#include "sysdep/sigcontext.h"
25#include "irq_user.h"
26#include "ptrace_user.h"
27#include "init.h"
28#include "os.h"
29#include "uml-config.h"
30#include "choose-mode.h"
31#include "mode.h"
32#include "tempfile.h"
33#include "kern_constants.h"
34
35int protect_memory(unsigned long addr, unsigned long len, int r, int w, int x,
36 int must_succeed)
37{
38 int err;
39
40 err = os_protect_memory((void *) addr, len, r, w, x);
41 if(err < 0){
42 if(must_succeed)
43 panic("protect failed, err = %d", -err);
44 else return(err);
45 }
46 return(0);
47}
48
49void kill_child_dead(int pid)
50{
51 kill(pid, SIGKILL);
52 kill(pid, SIGCONT);
53 do {
54 int n;
55 CATCH_EINTR(n = waitpid(pid, NULL, 0));
56 if (n > 0)
57 kill(pid, SIGCONT);
58 else
59 break;
60 } while(1);
61}
62
63void stop(void)
64{
65 while(1) sleep(1000000);
66}
67
68int wait_for_stop(int pid, int sig, int cont_type, void *relay)
69{
70 sigset_t *relay_signals = relay;
71 int status, ret;
72
73 while(1){
74 CATCH_EINTR(ret = waitpid(pid, &status, WUNTRACED));
75 if((ret < 0) ||
76 !WIFSTOPPED(status) || (WSTOPSIG(status) != sig)){
77 if(ret < 0){
78 printk("wait failed, errno = %d\n",
79 errno);
80 }
81 else if(WIFEXITED(status))
82 printk("process %d exited with status %d\n",
83 pid, WEXITSTATUS(status));
84 else if(WIFSIGNALED(status))
85 printk("process %d exited with signal %d\n",
86 pid, WTERMSIG(status));
87 else if((WSTOPSIG(status) == SIGVTALRM) ||
88 (WSTOPSIG(status) == SIGALRM) ||
89 (WSTOPSIG(status) == SIGIO) ||
90 (WSTOPSIG(status) == SIGPROF) ||
91 (WSTOPSIG(status) == SIGCHLD) ||
92 (WSTOPSIG(status) == SIGWINCH) ||
93 (WSTOPSIG(status) == SIGINT)){
94 ptrace(cont_type, pid, 0, WSTOPSIG(status));
95 continue;
96 }
97 else if((relay_signals != NULL) &&
98 sigismember(relay_signals, WSTOPSIG(status))){
99 ptrace(cont_type, pid, 0, WSTOPSIG(status));
100 continue;
101 }
102 else printk("process %d stopped with signal %d\n",
103 pid, WSTOPSIG(status));
104 panic("wait_for_stop failed to wait for %d to stop "
105 "with %d\n", pid, sig);
106 }
107 return(status);
108 }
109}
110
111void forward_ipi(int fd, int pid)
112{
113 int err;
114
115 err = os_set_owner(fd, pid);
116 if(err < 0)
117 printk("forward_ipi: set_owner failed, fd = %d, me = %d, "
118 "target = %d, err = %d\n", fd, os_getpid(), pid, -err);
119}
120
121/*
122 *-------------------------
123 * only for tt mode (will be deleted in future...)
124 *-------------------------
125 */
126
127struct tramp {
128 int (*tramp)(void *);
129 void *tramp_data;
130 unsigned long temp_stack;
131 int flags;
132 int pid;
133};
134
135/* See above for why sigkill is here */
136
137int sigkill = SIGKILL;
138
139int outer_tramp(void *arg)
140{
141 struct tramp *t;
142 int sig = sigkill;
143
144 t = arg;
145 t->pid = clone(t->tramp, (void *) t->temp_stack + UM_KERN_PAGE_SIZE/2,
146 t->flags, t->tramp_data);
147 if(t->pid > 0) wait_for_stop(t->pid, SIGSTOP, PTRACE_CONT, NULL);
148 kill(os_getpid(), sig);
149 _exit(0);
150}
151
152int start_fork_tramp(void *thread_arg, unsigned long temp_stack,
153 int clone_flags, int (*tramp)(void *))
154{
155 struct tramp arg;
156 unsigned long sp;
157 int new_pid, status, err;
158
159 /* The trampoline will run on the temporary stack */
160 sp = stack_sp(temp_stack);
161
162 clone_flags |= CLONE_FILES | SIGCHLD;
163
164 arg.tramp = tramp;
165 arg.tramp_data = thread_arg;
166 arg.temp_stack = temp_stack;
167 arg.flags = clone_flags;
168
169 /* Start the process and wait for it to kill itself */
170 new_pid = clone(outer_tramp, (void *) sp, clone_flags, &arg);
171 if(new_pid < 0)
172 return(new_pid);
173
174 CATCH_EINTR(err = waitpid(new_pid, &status, 0));
175 if(err < 0)
176 panic("Waiting for outer trampoline failed - errno = %d",
177 errno);
178
179 if(!WIFSIGNALED(status) || (WTERMSIG(status) != SIGKILL))
180 panic("outer trampoline didn't exit with SIGKILL, "
181 "status = %d", status);
182
183 return(arg.pid);
184}
185
186void forward_pending_sigio(int target)
187{
188 sigset_t sigs;
189
190 if(sigpending(&sigs))
191 panic("forward_pending_sigio : sigpending failed");
192 if(sigismember(&sigs, SIGIO))
193 kill(target, SIGIO);
194}
195
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-07 16:51:05 -0500