diff options
Diffstat (limited to 'arch/um/kernel/user_util.c')
| -rw-r--r-- | arch/um/kernel/user_util.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/arch/um/kernel/user_util.c b/arch/um/kernel/user_util.c new file mode 100644 index 00000000000..954ff67cc8b --- /dev/null +++ b/arch/um/kernel/user_util.c @@ -0,0 +1,173 @@ +/* + * 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 <setjmp.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 "user_util.h" +#include "kern_util.h" +#include "user.h" +#include "mem_user.h" +#include "init.h" +#include "helper.h" +#include "ptrace_user.h" +#include "uml-config.h" + +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){ + CATCH_EINTR(ret = waitpid(pid, &status, WUNTRACED)); + if((ret < 0) || + !WIFSTOPPED(status) || (WSTOPSIG(status) != sig)){ + if(ret < 0){ + printk("wait failed, errno = %d\n", + errno); + } + else if(WIFEXITED(status)) + printk("process %d exited with status %d\n", + pid, WEXITSTATUS(status)); + else if(WIFSIGNALED(status)) + printk("process %d exited with signal %d\n", + pid, 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 %d stopped with signal %d\n", + pid, WSTOPSIG(status)); + panic("wait_for_stop failed to wait for %d to stop " + "with %d\n", pid, sig); + } + return(status); + } +} + +int raw(int fd) +{ + struct termios tt; + int err; + + CATCH_EINTR(err = tcgetattr(fd, &tt)); + if (err < 0) { + printk("tcgetattr failed, errno = %d\n", errno); + return(-errno); + } + + cfmakeraw(&tt); + + CATCH_EINTR(err = tcsetattr(fd, TCSADRAIN, &tt)); + if (err < 0) { + printk("tcsetattr failed, errno = %d\n", errno); + 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); + 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); +} + +int setjmp_wrapper(void (*proc)(void *, void *), ...) +{ + va_list args; + sigjmp_buf buf; + int n; + + n = sigsetjmp(buf, 1); + if(n == 0){ + va_start(args, proc); + (*proc)(&buf, &args); + } + va_end(args); + return(n); +} + +/* + * 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: + */ |