/* * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) * Licensed under the GPL */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <limits.h> #include <sys/mman.h> #include <sys/stat.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 "kern_util.h" #include "user.h" #include "mem_user.h" #include "init.h" #include "ptrace_user.h" #include "uml-config.h" #include "os.h" #include "longjmp.h" #include "kern_constants.h" void stack_protections(unsigned long address) { int prot = PROT_READ | PROT_WRITE | PROT_EXEC; if(mprotect((void *) address, UM_KERN_PAGE_SIZE, prot) < 0) panic("protecting stack failed, errno = %d", errno); } void task_protections(unsigned long address) { unsigned long guard = address + UM_KERN_PAGE_SIZE; unsigned long stack = guard + UM_KERN_PAGE_SIZE; int prot = 0, pages; #ifdef notdef if(mprotect((void *) stack, UM_KERN_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 * UM_KERN_PAGE_SIZE, prot) < 0) panic("protecting stack failed, errno = %d", errno); } int raw(int fd) { struct termios tt; int err; CATCH_EINTR(err = tcgetattr(fd, &tt)); if(err < 0) return -errno; cfmakeraw(&tt); CATCH_EINTR(err = tcsetattr(fd, TCSADRAIN, &tt)); if(err < 0) return -errno; /* XXX tcsetattr could have applied only some changes * (and cfmakeraw() is a set of changes) */ return(0); } void setup_machinename(char *machine_out) { struct utsname host; uname(&host); #ifdef UML_CONFIG_UML_X86 # ifndef UML_CONFIG_64BIT if (!strcmp(host.machine, "x86_64")) { strcpy(machine_out, "i686"); return; } # else if (!strcmp(host.machine, "i686")) { strcpy(machine_out, "x86_64"); return; } # endif #endif strcpy(machine_out, host.machine); } void setup_hostinfo(char *buf, int len) { struct utsname host; uname(&host); snprintf(buf, len, "%s %s %s %s %s", host.sysname, host.nodename, host.release, host.version, host.machine); } int setjmp_wrapper(void (*proc)(void *, void *), ...) { va_list args; jmp_buf buf; int n; n = UML_SETJMP(&buf); if(n == 0){ va_start(args, proc); (*proc)(&buf, &args); } va_end(args); return n; } void os_dump_core(void) { signal(SIGSEGV, SIG_DFL); abort(); }