2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
12 #include <sys/utsname.h>
13 #include <sys/param.h>
15 #include "asm/types.h"
24 #include "kern_util.h"
28 #include "ptrace_user.h"
29 #include "uml-config.h"
32 #include "kern_constants.h"
34 void stack_protections(unsigned long address)
36 if(mprotect((void *) address, UM_THREAD_SIZE,
37 PROT_READ | PROT_WRITE | PROT_EXEC) < 0)
38 panic("protecting stack failed, errno = %d", errno);
46 CATCH_EINTR(err = tcgetattr(fd, &tt));
52 CATCH_EINTR(err = tcsetattr(fd, TCSADRAIN, &tt));
56 /* XXX tcsetattr could have applied only some changes
57 * (and cfmakeraw() is a set of changes) */
61 void setup_machinename(char *machine_out)
66 #ifdef UML_CONFIG_UML_X86
67 # ifndef UML_CONFIG_64BIT
68 if (!strcmp(host.machine, "x86_64")) {
69 strcpy(machine_out, "i686");
73 if (!strcmp(host.machine, "i686")) {
74 strcpy(machine_out, "x86_64");
79 strcpy(machine_out, host.machine);
82 void setup_hostinfo(char *buf, int len)
87 snprintf(buf, len, "%s %s %s %s %s", host.sysname, host.nodename,
88 host.release, host.version, host.machine);
91 void os_dump_core(void)
95 signal(SIGSEGV, SIG_DFL);
98 * We are about to SIGTERM this entire process group to ensure that
99 * nothing is around to run after the kernel exits. The
100 * kernel wants to abort, not die through SIGTERM, so we
104 signal(SIGTERM, SIG_IGN);
107 * Most of the other processes associated with this UML are
108 * likely sTopped, so give them a SIGCONT so they see the
114 * Now, having sent signals to everyone but us, make sure they
115 * die by ptrace. Processes can survive what's been done to
116 * them so far - the mechanism I understand is receiving a
117 * SIGSEGV and segfaulting immediately upon return. There is
118 * always a SIGSEGV pending, and (I'm guessing) signals are
119 * processed in numeric order so the SIGTERM (signal 15 vs
120 * SIGSEGV being signal 11) is never handled.
122 * Run a waitpid loop until we get some kind of error.
123 * Hopefully, it's ECHILD, but there's not a lot we can do if
124 * it's something else. Tell os_kill_ptraced_process not to
125 * wait for the child to report its death because there's
126 * nothing reasonable to do if that fails.
129 while ((pid = waitpid(-1, NULL, WNOHANG | __WALL)) > 0)
130 os_kill_ptraced_process(pid, 0);