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> |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 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> |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 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" |
Jeff Dike | 1d7173b | 2006-01-18 17:42:49 -0800 | [diff] [blame] | 31 | #include "longjmp.h" |
Jeff Dike | 1ffb916 | 2007-05-06 14:51:22 -0700 | [diff] [blame] | 32 | #include "kern_constants.h" |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 33 | |
| 34 | void stack_protections(unsigned long address) |
| 35 | { |
| 36 | int prot = PROT_READ | PROT_WRITE | PROT_EXEC; |
| 37 | |
Jeff Dike | 1ffb916 | 2007-05-06 14:51:22 -0700 | [diff] [blame] | 38 | if(mprotect((void *) address, UM_KERN_PAGE_SIZE, prot) < 0) |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 39 | panic("protecting stack failed, errno = %d", errno); |
| 40 | } |
| 41 | |
| 42 | void task_protections(unsigned long address) |
| 43 | { |
Jeff Dike | 1ffb916 | 2007-05-06 14:51:22 -0700 | [diff] [blame] | 44 | unsigned long guard = address + UM_KERN_PAGE_SIZE; |
| 45 | unsigned long stack = guard + UM_KERN_PAGE_SIZE; |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 46 | int prot = 0, pages; |
| 47 | |
| 48 | #ifdef notdef |
Jeff Dike | 1ffb916 | 2007-05-06 14:51:22 -0700 | [diff] [blame] | 49 | if(mprotect((void *) stack, UM_KERN_PAGE_SIZE, prot) < 0) |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 50 | panic("protecting guard page failed, errno = %d", errno); |
| 51 | #endif |
| 52 | pages = (1 << UML_CONFIG_KERNEL_STACK_ORDER) - 2; |
| 53 | prot = PROT_READ | PROT_WRITE | PROT_EXEC; |
Jeff Dike | 1ffb916 | 2007-05-06 14:51:22 -0700 | [diff] [blame] | 54 | if(mprotect((void *) stack, pages * UM_KERN_PAGE_SIZE, prot) < 0) |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 55 | panic("protecting stack failed, errno = %d", errno); |
| 56 | } |
| 57 | |
| 58 | int raw(int fd) |
| 59 | { |
| 60 | struct termios tt; |
| 61 | int err; |
| 62 | |
| 63 | CATCH_EINTR(err = tcgetattr(fd, &tt)); |
| 64 | if(err < 0) |
| 65 | return -errno; |
| 66 | |
| 67 | cfmakeraw(&tt); |
| 68 | |
| 69 | CATCH_EINTR(err = tcsetattr(fd, TCSADRAIN, &tt)); |
| 70 | if(err < 0) |
| 71 | return -errno; |
| 72 | |
| 73 | /* XXX tcsetattr could have applied only some changes |
| 74 | * (and cfmakeraw() is a set of changes) */ |
| 75 | return(0); |
| 76 | } |
| 77 | |
| 78 | void setup_machinename(char *machine_out) |
| 79 | { |
| 80 | struct utsname host; |
| 81 | |
| 82 | uname(&host); |
Paolo 'Blaisorblade' Giarrusso | 69fada3 | 2006-10-11 01:21:36 -0700 | [diff] [blame] | 83 | #ifdef UML_CONFIG_UML_X86 |
| 84 | # ifndef UML_CONFIG_64BIT |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 85 | if (!strcmp(host.machine, "x86_64")) { |
| 86 | strcpy(machine_out, "i686"); |
| 87 | return; |
| 88 | } |
Paolo 'Blaisorblade' Giarrusso | 69fada3 | 2006-10-11 01:21:36 -0700 | [diff] [blame] | 89 | # else |
| 90 | if (!strcmp(host.machine, "i686")) { |
| 91 | strcpy(machine_out, "x86_64"); |
| 92 | return; |
| 93 | } |
| 94 | # endif |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 95 | #endif |
| 96 | strcpy(machine_out, host.machine); |
| 97 | } |
| 98 | |
Jeff Dike | b4ffb6a | 2007-05-06 14:50:59 -0700 | [diff] [blame] | 99 | void setup_hostinfo(char *buf, int len) |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 100 | { |
| 101 | struct utsname host; |
| 102 | |
| 103 | uname(&host); |
Jeff Dike | b4ffb6a | 2007-05-06 14:50:59 -0700 | [diff] [blame] | 104 | snprintf(buf, len, "%s %s %s %s %s", host.sysname, host.nodename, |
| 105 | host.release, host.version, host.machine); |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 106 | } |
| 107 | |
| 108 | int setjmp_wrapper(void (*proc)(void *, void *), ...) |
| 109 | { |
| 110 | va_list args; |
Jeff Dike | ad28e02 | 2006-04-18 22:21:41 -0700 | [diff] [blame] | 111 | jmp_buf buf; |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 112 | int n; |
| 113 | |
Jeff Dike | 13c06be | 2006-09-25 23:32:59 -0700 | [diff] [blame] | 114 | n = UML_SETJMP(&buf); |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 115 | if(n == 0){ |
| 116 | va_start(args, proc); |
| 117 | (*proc)(&buf, &args); |
| 118 | } |
| 119 | va_end(args); |
Jeff Dike | 13c06be | 2006-09-25 23:32:59 -0700 | [diff] [blame] | 120 | return n; |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 121 | } |
Jeff Dike | 63843c2 | 2007-05-06 14:51:39 -0700 | [diff] [blame^] | 122 | |
| 123 | void os_dump_core(void) |
| 124 | { |
| 125 | signal(SIGSEGV, SIG_DFL); |
| 126 | abort(); |
| 127 | } |