newlib-cygwin/newlib/libc/sys/linux/brk.c

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2000-12-08 Werner Almesberger <Werner.Almesberger@epfl.ch> * configure.host: Added x86 linux target. * libc/unix/getpass.c (_PATH_PASSWD, _PASSWORD_LEN): Default definitions provided if not already defined. * libc/sys/linux/crt0.c: New file. * libc/sys/linux/Makefile.am: Ditto. * libc/sys/linux/Makefile.in: Ditto. * libc/sys/linux/aclocal.m4: Ditto. * libc/sys/linux/brk.c: Ditto. * libc/sys/linux/configure: Ditto. * libc/sys/linux/configure.in: Ditto. * libc/sys/linux/getoptlong.c: Ditto. * libc/sys/linux/ids.c: Ditto. * libc/sys/linux/inode.c: Ditto. * libc/sys/linux/io.c: Ditto. * libc/sys/linux/linux.c: Ditto. * libc/sys/linux/process.c: Ditto. * libc/sys/linux/realpath.c: Ditto. * libc/sys/linux/select.c: Ditto. * libc/sys/linux/signal.c: Ditto. * libc/sys/linux/systat.c: Ditto. * libc/sys/linux/termios.c: Ditto. * libc/sys/linux/time.c: Ditto. * libc/sys/linux/wait.c: Ditto. * libc/sys/linux/include/alloca.h: Ditto. * libc/sys/linux/include/getopt.h: Ditto. * libc/sys/linux/include/stdint.h: Ditto. * libc/sys/linux/include/unistd.h: Ditto. * libc/sys/linux/sys/cdefs.h: Ditto. * libc/sys/linux/sys/dirent.h: Ditto. * libc/sys/linux/sys/errno.h: Ditto. * libc/sys/linux/sys/fcntl.h: Ditto. * libc/sys/linux/sys/file.h: Ditto. * libc/sys/linux/sys/ioctl.h: Ditto. * libc/sys/linux/sys/resource.h: Ditto. * libc/sys/linux/sys/signal.h: Ditto. * libc/sys/linux/sys/stat.h: Ditto. * libc/sys/linux/sys/syscall.h: Ditto. * libc/sys/linux/sys/termios.h: Ditto. * libc/sys/linux/sys/time.h: Ditto. * libc/sys/linux/sys/types.h: Ditto. * libc/sys/linux/sys/utmp.h: Ditto. * libc/sys/linux/sys/utsname.h: Ditto. * libc/sys/linux/sys/wait.h: Ditto.
2000-12-09 09:20:32 +08:00
/* libc/sys/linux/brk.c - Change data segment size */
/* Written 2000 by Werner Almesberger */
#include <stddef.h> /* for NULL */
#include <sys/types.h>
#include <sys/unistd.h>
2002-04-03 Jeff Johnston <jjohnstn@redhat.com> * configure.host: Add support for machine subdirectory of sys subdirectory. * configure.in: Add check for sys machine subdirectory. * Makefile.am: Ditto. * configure: Regenerated. * Makefile.in: Ditto. * libc/sys/linux/crt0.c: Moved to machine/i386 directory. * libc/sys/linux/sys/syscall.h: Ditto. * libc/sys/linux/sleep.c: New file. * libc/sys/linux/socket.c: Ditto. * libc/sys/linux/sockops.h: Ditto. * libc/sys/linux/stack.c: Ditto. * libc/sys/linux/usleep.c: Ditto. * libc/sys/linux/machine/Makefile.am: Ditto. * libc/sys/linux/machine/Makefile.in: Ditto. * libc/sys/linux/machine/aclocal.m4: Ditto. * libc/sys/linux/machine/configure: Ditto. * libc/sys/linux/machine/configure.in: Ditto. * libc/sys/linux/machine/i386/Makefile.am: Ditto. * libc/sys/linux/machine/i386/Makefile.in: Ditto. * libc/sys/linux/machine/i386/aclocal.m4: Ditto. * libc/sys/linux/machine/i386/configure: Ditto. * libc/sys/linux/machine/i386/configure.in: Ditto. * libc/sys/linux/machine/i386/crt0.c: Ditto. * libc/sys/linux/machine/i386/sigset.c: Ditto. * libc/sys/linux/machine/i386/sigstack.h: Ditto. * libc/sys/linux/machine/i386/socketcall.h: Ditto. * libc/sys/linux/machine/i386/syscall.h: Ditto. * libc/sys/linux/sys/select.h: Ditto. * libc/sys/linux/configure.in: Add support for machine directory. * libc/sys/linux/Makefile.am: Ditto plus add new files above. * libc/sys/linux/Makefile.in: Regenerated. * libc/sys/linux/configure: Ditto. * libc/sys/linux/brk.c: Use machine/syscall.h instead of sys/syscall.h. * libc/sys/linux/inode.c: Ditto. * libc/sys/linux/linux.c: Ditto. * libc/sys/linux/process.c: Ditto. * libc/sys/linux/systat.c: Ditto. * libc/sys/linux/time.c: Ditto. * libc/sys/linux/wait.c: Ditto. * libc/sys/linux/ids.c: Change header plus add setfsgid/setfsuid. * libc/sys/linux/io.c: Change header plus add readv/writev. * libc/sys/linux/signal.c: Change header plus change sigsuspend to use __sigsuspend syscall. * libc/sys/linux/select.c: Change header plus change select to use _newselect syscall. * libc/sys/linux/sys/cdefs.h: Add a number of standard definitions used by glibc header files. * libc/sys/linux/sys/types.h: Add __socklen_t and __useconds_t types.
2002-04-04 06:46:21 +08:00
#include <machine/syscall.h>
2000-12-08 Werner Almesberger <Werner.Almesberger@epfl.ch> * configure.host: Added x86 linux target. * libc/unix/getpass.c (_PATH_PASSWD, _PASSWORD_LEN): Default definitions provided if not already defined. * libc/sys/linux/crt0.c: New file. * libc/sys/linux/Makefile.am: Ditto. * libc/sys/linux/Makefile.in: Ditto. * libc/sys/linux/aclocal.m4: Ditto. * libc/sys/linux/brk.c: Ditto. * libc/sys/linux/configure: Ditto. * libc/sys/linux/configure.in: Ditto. * libc/sys/linux/getoptlong.c: Ditto. * libc/sys/linux/ids.c: Ditto. * libc/sys/linux/inode.c: Ditto. * libc/sys/linux/io.c: Ditto. * libc/sys/linux/linux.c: Ditto. * libc/sys/linux/process.c: Ditto. * libc/sys/linux/realpath.c: Ditto. * libc/sys/linux/select.c: Ditto. * libc/sys/linux/signal.c: Ditto. * libc/sys/linux/systat.c: Ditto. * libc/sys/linux/termios.c: Ditto. * libc/sys/linux/time.c: Ditto. * libc/sys/linux/wait.c: Ditto. * libc/sys/linux/include/alloca.h: Ditto. * libc/sys/linux/include/getopt.h: Ditto. * libc/sys/linux/include/stdint.h: Ditto. * libc/sys/linux/include/unistd.h: Ditto. * libc/sys/linux/sys/cdefs.h: Ditto. * libc/sys/linux/sys/dirent.h: Ditto. * libc/sys/linux/sys/errno.h: Ditto. * libc/sys/linux/sys/fcntl.h: Ditto. * libc/sys/linux/sys/file.h: Ditto. * libc/sys/linux/sys/ioctl.h: Ditto. * libc/sys/linux/sys/resource.h: Ditto. * libc/sys/linux/sys/signal.h: Ditto. * libc/sys/linux/sys/stat.h: Ditto. * libc/sys/linux/sys/syscall.h: Ditto. * libc/sys/linux/sys/termios.h: Ditto. * libc/sys/linux/sys/time.h: Ditto. * libc/sys/linux/sys/types.h: Ditto. * libc/sys/linux/sys/utmp.h: Ditto. * libc/sys/linux/sys/utsname.h: Ditto. * libc/sys/linux/sys/wait.h: Ditto.
2000-12-09 09:20:32 +08:00
static char *curr_brk = NULL;
#define __NR___brk __NR_brk /* Linux brk ain't no brk(2) */
static _syscall1(void *,__brk,void *,end_data_segment)
int brk(void *end_data_segment)
{
char *new_brk;
new_brk = __brk(end_data_segment);
if (new_brk != end_data_segment) return -1;
curr_brk = new_brk;
return 0;
}
void *sbrk(size_t increment) /* SHOULD be ptrdiff_t */
{
char *old_brk,*new_brk;
if (!curr_brk) curr_brk = __brk(NULL);
new_brk = __brk(curr_brk+increment);
if (new_brk != curr_brk+increment) return (void *) -1;
old_brk = curr_brk;
curr_brk = new_brk;
return old_brk;
}