diff options
author | Gennady Sharapov <Gennady.V.Sharapov@intel.com> | 2006-01-18 17:42:41 -0800 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-18 19:20:19 -0800 |
commit | 4fef0c10fa174b57a10854b8b4b2b90d155706e0 (patch) | |
tree | 02cfcc989114da9a6d46484753937cc0e3a60b52 /arch/um/os-Linux/util.c | |
parent | 12919aa6e015dd85170fc3b1a3e10a5dfd116c72 (diff) |
[PATCH] uml: move libc-dependent utility procedures
The serial UML OS-abstraction layer patch (um/kernel dir).
This moves all systemcalls from user_util.c file under os-Linux dir
Signed-off-by: Gennady Sharapov <Gennady.V.Sharapov@intel.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um/os-Linux/util.c')
-rw-r--r-- | arch/um/os-Linux/util.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/arch/um/os-Linux/util.c b/arch/um/os-Linux/util.c new file mode 100644 index 00000000000..d224434d561 --- /dev/null +++ b/arch/um/os-Linux/util.c @@ -0,0 +1,116 @@ +/* + * 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 "ptrace_user.h" +#include "uml-config.h" +#include "os.h" + +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 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); +#if defined(UML_CONFIG_UML_X86) && !defined(UML_CONFIG_64BIT) + if (!strcmp(host.machine, "x86_64")) { + strcpy(machine_out, "i686"); + return; + } +#endif + 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); +} |