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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 | /* * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) * Licensed under the GPL */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <limits.h> #include <sys/mman.h> #include <sys/stat.h> #include <sys/ptrace.h> #include <sys/utsname.h> #include <sys/param.h> #include <sys/time.h> #include "asm/types.h" #include <ctype.h> #include <signal.h> #include <wait.h> #include <errno.h> #include <stdarg.h> #include <sched.h> #include <termios.h> #include <string.h> #include "user_util.h" #include "kern_util.h" #include "user.h" #include "mem_user.h" #include "init.h" #include "helper.h" #include "uml-config.h" #define COMMAND_LINE_SIZE _POSIX_ARG_MAX /* Changed in linux_main and setup_arch, which run before SMP is started */ char saved_command_line[COMMAND_LINE_SIZE] = { 0 }; char command_line[COMMAND_LINE_SIZE] = { 0 }; void add_arg(char *cmd_line, char *arg) { if (strlen(cmd_line) + strlen(arg) + 1 > COMMAND_LINE_SIZE) { printf("add_arg: Too much command line!\n"); exit(1); } if(strlen(cmd_line) > 0) strcat(cmd_line, " "); strcat(cmd_line, arg); } void stop(void) { while(1) sleep(1000000); } void stack_protections(unsigned long address) { int prot = PROT_READ | PROT_WRITE | PROT_EXEC; if(mprotect((void *) address, page_size(), prot) < 0) panic("protecting stack failed, errno = %d", errno); } void task_protections(unsigned long address) { unsigned long guard = address + page_size(); unsigned long stack = guard + page_size(); int prot = 0, pages; #ifdef notdef if(mprotect((void *) stack, page_size(), prot) < 0) panic("protecting guard page failed, errno = %d", errno); #endif pages = (1 << UML_CONFIG_KERNEL_STACK_ORDER) - 2; prot = PROT_READ | PROT_WRITE | PROT_EXEC; if(mprotect((void *) stack, pages * page_size(), prot) < 0) panic("protecting stack failed, errno = %d", errno); } int wait_for_stop(int pid, int sig, int cont_type, void *relay) { sigset_t *relay_signals = relay; int status, ret; while(1){ if(((ret = waitpid(pid, &status, WUNTRACED)) < 0) || !WIFSTOPPED(status) || (WSTOPSIG(status) != sig)){ if(ret < 0){ if(errno == EINTR) continue; printk("wait failed, errno = %d\n", errno); } else if(WIFEXITED(status)) printk("process exited with status %d\n", WEXITSTATUS(status)); else if(WIFSIGNALED(status)) printk("process exited with signal %d\n", WTERMSIG(status)); else if((WSTOPSIG(status) == SIGVTALRM) || (WSTOPSIG(status) == SIGALRM) || (WSTOPSIG(status) == SIGIO) || (WSTOPSIG(status) == SIGPROF) || (WSTOPSIG(status) == SIGCHLD) || (WSTOPSIG(status) == SIGWINCH) || (WSTOPSIG(status) == SIGINT)){ ptrace(cont_type, pid, 0, WSTOPSIG(status)); continue; } else if((relay_signals != NULL) && sigismember(relay_signals, WSTOPSIG(status))){ ptrace(cont_type, pid, 0, WSTOPSIG(status)); continue; } else printk("process stopped with signal %d\n", WSTOPSIG(status)); panic("wait_for_stop failed to wait for %d to stop " "with %d\n", pid, sig); } return(status); } } int clone_and_wait(int (*fn)(void *), void *arg, void *sp, int flags) { int pid; pid = clone(fn, sp, flags, arg); if(pid < 0) return(-1); wait_for_stop(pid, SIGSTOP, PTRACE_CONT, NULL); ptrace(PTRACE_CONT, pid, 0, 0); return(pid); } int raw(int fd, int complain) { struct termios tt; int err; tcgetattr(fd, &tt); cfmakeraw(&tt); err = tcsetattr(fd, TCSANOW, &tt); if((err < 0) && complain){ printk("tcsetattr failed, errno = %d\n", errno); return(-errno); } return(0); } void setup_machinename(char *machine_out) { struct utsname host; uname(&host); strcpy(machine_out, host.machine); } char host_info[(_UTSNAME_LENGTH + 1) * 4 + _UTSNAME_NODENAME_LENGTH + 1]; void setup_hostinfo(void) { struct utsname host; uname(&host); sprintf(host_info, "%s %s %s %s %s", host.sysname, host.nodename, host.release, host.version, host.machine); } /* * Overrides for Emacs so that we follow Linus's tabbing style. * Emacs will notice this stuff at the end of the file and automatically * adjust the settings for this buffer only. This must remain at the end * of the file. * --------------------------------------------------------------------------- * Local variables: * c-file-style: "linux" * End: */ |