Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 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 <setjmp.h> |
| 11 | #include <sys/mman.h> |
| 12 | #include <sys/stat.h> |
| 13 | #include <sys/utsname.h> |
| 14 | #include <sys/param.h> |
| 15 | #include <sys/time.h> |
| 16 | #include "asm/types.h" |
| 17 | #include <ctype.h> |
| 18 | #include <signal.h> |
| 19 | #include <wait.h> |
| 20 | #include <errno.h> |
| 21 | #include <stdarg.h> |
| 22 | #include <sched.h> |
| 23 | #include <termios.h> |
| 24 | #include <string.h> |
| 25 | #include "user_util.h" |
| 26 | #include "kern_util.h" |
| 27 | #include "user.h" |
| 28 | #include "mem_user.h" |
| 29 | #include "init.h" |
| 30 | #include "ptrace_user.h" |
| 31 | #include "uml-config.h" |
| 32 | #include "os.h" |
Jeff Dike | 1d7173b | 2006-01-18 17:42:49 -0800 | [diff] [blame] | 33 | #include "longjmp.h" |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 34 | |
| 35 | void stack_protections(unsigned long address) |
| 36 | { |
| 37 | int prot = PROT_READ | PROT_WRITE | PROT_EXEC; |
| 38 | |
| 39 | if(mprotect((void *) address, page_size(), prot) < 0) |
| 40 | panic("protecting stack failed, errno = %d", errno); |
| 41 | } |
| 42 | |
| 43 | void task_protections(unsigned long address) |
| 44 | { |
| 45 | unsigned long guard = address + page_size(); |
| 46 | unsigned long stack = guard + page_size(); |
| 47 | int prot = 0, pages; |
| 48 | |
| 49 | #ifdef notdef |
| 50 | if(mprotect((void *) stack, page_size(), prot) < 0) |
| 51 | panic("protecting guard page failed, errno = %d", errno); |
| 52 | #endif |
| 53 | pages = (1 << UML_CONFIG_KERNEL_STACK_ORDER) - 2; |
| 54 | prot = PROT_READ | PROT_WRITE | PROT_EXEC; |
| 55 | if(mprotect((void *) stack, pages * page_size(), prot) < 0) |
| 56 | panic("protecting stack failed, errno = %d", errno); |
| 57 | } |
| 58 | |
| 59 | int raw(int fd) |
| 60 | { |
| 61 | struct termios tt; |
| 62 | int err; |
| 63 | |
| 64 | CATCH_EINTR(err = tcgetattr(fd, &tt)); |
| 65 | if(err < 0) |
| 66 | return -errno; |
| 67 | |
| 68 | cfmakeraw(&tt); |
| 69 | |
| 70 | CATCH_EINTR(err = tcsetattr(fd, TCSADRAIN, &tt)); |
| 71 | if(err < 0) |
| 72 | return -errno; |
| 73 | |
| 74 | /* XXX tcsetattr could have applied only some changes |
| 75 | * (and cfmakeraw() is a set of changes) */ |
| 76 | return(0); |
| 77 | } |
| 78 | |
| 79 | void setup_machinename(char *machine_out) |
| 80 | { |
| 81 | struct utsname host; |
| 82 | |
| 83 | uname(&host); |
| 84 | #if defined(UML_CONFIG_UML_X86) && !defined(UML_CONFIG_64BIT) |
| 85 | if (!strcmp(host.machine, "x86_64")) { |
| 86 | strcpy(machine_out, "i686"); |
| 87 | return; |
| 88 | } |
| 89 | #endif |
| 90 | strcpy(machine_out, host.machine); |
| 91 | } |
| 92 | |
| 93 | char host_info[(_UTSNAME_LENGTH + 1) * 4 + _UTSNAME_NODENAME_LENGTH + 1]; |
| 94 | |
| 95 | void setup_hostinfo(void) |
| 96 | { |
| 97 | struct utsname host; |
| 98 | |
| 99 | uname(&host); |
| 100 | sprintf(host_info, "%s %s %s %s %s", host.sysname, host.nodename, |
| 101 | host.release, host.version, host.machine); |
| 102 | } |
| 103 | |
| 104 | int setjmp_wrapper(void (*proc)(void *, void *), ...) |
| 105 | { |
| 106 | va_list args; |
| 107 | sigjmp_buf buf; |
| 108 | int n; |
| 109 | |
| 110 | n = sigsetjmp(buf, 1); |
| 111 | if(n == 0){ |
| 112 | va_start(args, proc); |
| 113 | (*proc)(&buf, &args); |
| 114 | } |
| 115 | va_end(args); |
| 116 | return(n); |
| 117 | } |