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 <sys/mman.h> 11#include <sys/stat.h> 12#include <sys/utsname.h> 13#include <sys/param.h> 14#include <sys/time.h> 15#include "asm/types.h" 16#include <ctype.h> 17#include <signal.h> 18#include <wait.h> 19#include <errno.h> 20#include <stdarg.h> 21#include <sched.h> 22#include <termios.h> 23#include <string.h> 24#include "kern_util.h" 25#include "user.h" 26#include "mem_user.h" 27#include "init.h" 28#include "ptrace_user.h" 29#include "uml-config.h" 30#include "os.h" 31#include "longjmp.h" 32#include "kern_constants.h" 33 34void stack_protections(unsigned long address) 35{ 36 if(mprotect((void *) address, UM_THREAD_SIZE, 37 PROT_READ | PROT_WRITE | PROT_EXEC) < 0) 38 panic("protecting stack failed, errno = %d", errno); 39} 40 41int raw(int fd) 42{ 43 struct termios tt; 44 int err; 45 46 CATCH_EINTR(err = tcgetattr(fd, &tt)); 47 if(err < 0) 48 return -errno; 49 50 cfmakeraw(&tt); 51 52 CATCH_EINTR(err = tcsetattr(fd, TCSADRAIN, &tt)); 53 if(err < 0) 54 return -errno; 55 56 return 0; 57} 58 59void setup_machinename(char *machine_out) 60{ 61 struct utsname host; 62 63 uname(&host); 64#ifdef UML_CONFIG_UML_X86 65# ifndef UML_CONFIG_64BIT 66 if (!strcmp(host.machine, "x86_64")) { 67 strcpy(machine_out, "i686"); 68 return; 69 } 70# else 71 if (!strcmp(host.machine, "i686")) { 72 strcpy(machine_out, "x86_64"); 73 return; 74 } 75# endif 76#endif 77 strcpy(machine_out, host.machine); 78} 79 80void setup_hostinfo(char *buf, int len) 81{ 82 struct utsname host; 83 84 uname(&host); 85 snprintf(buf, len, "%s %s %s %s %s", host.sysname, host.nodename, 86 host.release, host.version, host.machine); 87} 88 89int setjmp_wrapper(void (*proc)(void *, void *), ...) 90{ 91 va_list args; 92 jmp_buf buf; 93 int n; 94 95 n = UML_SETJMP(&buf); 96 if(n == 0){ 97 va_start(args, proc); 98 (*proc)(&buf, &args); 99 } 100 va_end(args); 101 return n; 102} 103 104void os_dump_core(void) 105{ 106 signal(SIGSEGV, SIG_DFL); 107 abort(); 108} 109