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6#include <stdio.h>
7#include <stdlib.h>
8#include <unistd.h>
9#include <errno.h>
10#include <signal.h>
11#include <string.h>
12#include <termios.h>
13#include <wait.h>
14#include <sys/mman.h>
15#include <sys/utsname.h>
16#include <os.h>
17
18void stack_protections(unsigned long address)
19{
20 if (mprotect((void *) address, UM_THREAD_SIZE,
21 PROT_READ | PROT_WRITE | PROT_EXEC) < 0)
22 panic("protecting stack failed, errno = %d", errno);
23}
24
25int raw(int fd)
26{
27 struct termios tt;
28 int err;
29
30 CATCH_EINTR(err = tcgetattr(fd, &tt));
31 if (err < 0)
32 return -errno;
33
34 cfmakeraw(&tt);
35
36 CATCH_EINTR(err = tcsetattr(fd, TCSADRAIN, &tt));
37 if (err < 0)
38 return -errno;
39
40
41
42
43
44 return 0;
45}
46
47void setup_machinename(char *machine_out)
48{
49 struct utsname host;
50
51 uname(&host);
52#ifdef UML_CONFIG_UML_X86
53# ifndef UML_CONFIG_64BIT
54 if (!strcmp(host.machine, "x86_64")) {
55 strcpy(machine_out, "i686");
56 return;
57 }
58# else
59 if (!strcmp(host.machine, "i686")) {
60 strcpy(machine_out, "x86_64");
61 return;
62 }
63# endif
64#endif
65 strcpy(machine_out, host.machine);
66}
67
68void setup_hostinfo(char *buf, int len)
69{
70 struct utsname host;
71
72 uname(&host);
73 snprintf(buf, len, "%s %s %s %s %s", host.sysname, host.nodename,
74 host.release, host.version, host.machine);
75}
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82
83static inline void __attribute__ ((noreturn)) uml_abort(void)
84{
85 sigset_t sig;
86
87 fflush(NULL);
88
89 if (!sigemptyset(&sig) && !sigaddset(&sig, SIGABRT))
90 sigprocmask(SIG_UNBLOCK, &sig, 0);
91
92 for (;;)
93 if (kill(getpid(), SIGABRT) < 0)
94 exit(127);
95}
96
97void os_dump_core(void)
98{
99 int pid;
100
101 signal(SIGSEGV, SIG_DFL);
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110 signal(SIGTERM, SIG_IGN);
111 kill(0, SIGTERM);
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117 kill(0, SIGCONT);
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134
135 while ((pid = waitpid(-1, NULL, WNOHANG | __WALL)) > 0)
136 os_kill_ptraced_process(pid, 0);
137
138 uml_abort();
139}
140
141void um_early_printk(const char *s, unsigned int n)
142{
143 printf("%.*s", n, s);
144}
145