Sat Feb 10 13:09:03 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* sysdeps/unix/sysv/linux/m68k/brk.c, sysdeps/unix/sysv/linux/m68k/mmap.S, sysdeps/unix/sysv/linux/m68k/select.S, sysdeps/unix/sysv/linux/m68k/sigcontext.h, sysdeps/unix/sysv/linux/m68k/sigreturn.S, sysdeps/unix/sysv/linux/m68k/socket.S, sysdeps/unix/sysv/linux/m68k/syscall.S, sysdeps/unix/sysv/linux/m68k/sysdep.S, sysdeps/unix/sysv/linux/m68k/sysdep.h: New files. * sysdeps/unix/sysv/linux/m68k/brk.c, sysdeps/unix/sysv/linux/m68k/mmap.S, sysdeps/unix/sysv/linux/m68k/select.S, sysdeps/unix/sysv/linux/m68k/sigcontext.h, sysdeps/unix/sysv/linux/m68k/sigreturn.S, sysdeps/unix/sysv/linux/m68k/socket.S, sysdeps/unix/sysv/linux/m68k/syscall.S, sysdeps/unix/sysv/linux/m68k/sysdep.S, sysdeps/unix/sysv/linux/m68k/sysdep.h: New files.
This commit is contained in:
Roland McGrath
parent
4eea716e2d
commit
46d7de1907
10
ChangeLog
10
ChangeLog
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@ -21,6 +21,16 @@ Tue Feb 13 05:12:02 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>
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Sat Feb 10 13:09:03 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
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* sysdeps/unix/sysv/linux/m68k/brk.c,
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sysdeps/unix/sysv/linux/m68k/mmap.S,
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sysdeps/unix/sysv/linux/m68k/select.S,
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sysdeps/unix/sysv/linux/m68k/sigcontext.h,
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sysdeps/unix/sysv/linux/m68k/sigreturn.S,
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sysdeps/unix/sysv/linux/m68k/socket.S,
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sysdeps/unix/sysv/linux/m68k/syscall.S,
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sysdeps/unix/sysv/linux/m68k/sysdep.S,
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sysdeps/unix/sysv/linux/m68k/sysdep.h: New files.
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* sysdeps/m68k/fpu/isinfl.c, sysdeps/m68k/fpu/isnanl.c,
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sysdeps/m68k/isinfl.c, sysdeps/m68k/isnanl.c: New files.
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@ -0,0 +1,52 @@
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/* brk system call for Linux/m68k.
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Copyright (C) 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
|
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published by the Free Software Foundation; either version 2 of the
|
||||
License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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|
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <errno.h>
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#include <unistd.h>
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#include <sysdep.h>
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void *__curbrk;
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int
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__brk (void *addr)
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{
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void *newbrk;
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{
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register long d0 __asm__ ("%d0");
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asm ("move%.l %2, %%d1\n"
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"trap #0" /* Perform the system call. */
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: "=d" (d0)
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: "0" (SYS_ify (brk)), "g" (addr)
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: "%d0", "%d1");
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newbrk = (void *) d0;
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}
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__curbrk = newbrk;
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if (newbrk < addr)
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{
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errno = ENOMEM;
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return -1;
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}
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return 0;
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}
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weak_alias (__brk, brk)
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@ -0,0 +1,44 @@
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/* Copyright (C) 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
|
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <sysdep.h>
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.text
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SYSCALL_ERROR_HANDLER
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ENTRY (__mmap)
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move.l #SYS_ify (mmap), %d0 /* System call number in %d0. */
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lea 4(%sp), %a0 /* Address of args is 1st arg. */
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move.l %a0, %d1
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/* Do the system call trap. */
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trap #0
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/* Kludge: negative numbers are among the legal return values.
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If %d0 is between -4096 and 0 then there was an error. */
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cmp.l #-4096, %d0
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jhi syscall_error
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/* Successful; return the syscall's value. Copy it to %a0 because
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mmap is declared to return a pointer. */
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move.l %d0, %a0
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rts
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weak_alias (__mmap, mmap)
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@ -0,0 +1,53 @@
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/* Copyright (C) 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
|
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published by the Free Software Foundation; either version 2 of the
|
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License, or (at your option) any later version.
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|
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
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Library General Public License for more details.
|
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|
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You should have received a copy of the GNU Library General Public
|
||||
License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <sysdep.h>
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#define _ERRNO_H
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#include <errnos.h>
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/* Linux has two versions of the select system call. The old one expected
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one argument which must be a pointer to a struct which contains the
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five values. The new version expects the five arguments be given in the
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registers. First try the new version, if it's not available fall back
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to the old version. */
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.text
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SYSCALL_ERROR_HANDLER
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ENTRY (__select)
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#if 0 /* For now only use the old version. */
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DO_CALL (#SYS_ify (_newselect), 5)
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tst.l %d0
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jmi 1f
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rts
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1: move.l #-ENOSYS, %d1
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cmp.l %d1, %d0
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jne syscall_error /* Real error */
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/* Try again using the old syscall interface. */
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#endif
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lea 4(%sp), %a0
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move.l %a0, %d1
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move.l #SYS_ify (select), %d0
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trap #0
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tst.l %d0
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jmi syscall_error
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ret
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weak_alias (__select, select)
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@ -0,0 +1,31 @@
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/* Structure describing state saved while handling a signal. Linux/m68k version.
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Copyright (C) 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
|
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modify it under the terms of the GNU Library General Public License as
|
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published by the Free Software Foundation; either version 2 of the
|
||||
License, or (at your option) any later version.
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|
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The GNU C Library is distributed in the hope that it will be useful,
|
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
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Library General Public License for more details.
|
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|
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You should have received a copy of the GNU Library General Public
|
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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/* State of this thread when the signal was taken. */
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struct sigcontext
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{
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__sigset_t sc_mask;
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unsigned long sc_usp;
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unsigned long sc_d0;
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unsigned long sc_d1;
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unsigned long sc_a0;
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unsigned long sc_a1;
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unsigned short sc_sr;
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unsigned long sc_pc;
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};
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@ -0,0 +1,28 @@
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/* Copyright (C) 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
|
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modify it under the terms of the GNU Library General Public License as
|
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published by the Free Software Foundation; either version 2 of the
|
||||
License, or (at your option) any later version.
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|
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The GNU C Library is distributed in the hope that it will be useful,
|
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
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Library General Public License for more details.
|
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|
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You should have received a copy of the GNU Library General Public
|
||||
License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <sysdep.h>
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.text
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ENTRY (__sigreturn)
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addq.l #4, %sp /* Pop the return PC. */
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DO_CALL (#SYS_ify (sigreturn), 0)
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/* Do the system call; it never returns. */
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/* NOTREACHED */
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weak_alias (__sigreturn, sigreturn)
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@ -0,0 +1,62 @@
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/* Copyright (C) 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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|
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The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Library General Public License as
|
||||
published by the Free Software Foundation; either version 2 of the
|
||||
License, or (at your option) any later version.
|
||||
|
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The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Library General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Library General Public
|
||||
License along with the GNU C Library; see the file COPYING.LIB. If
|
||||
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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||||
Cambridge, MA 02139, USA. */
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#include <sysdep.h>
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#include <sys/socketcall.h>
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#define P(a, b) P2(a, b)
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#define P2(a, b) a##b
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.text
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SYSCALL_ERROR_HANDLER
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/* The socket-oriented system calls are handled unusally in Linux.
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They are all gated through the single `socketcall' system call number.
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`socketcall' takes two arguments: the first is the subcode, specifying
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which socket function is being called; and the second is a pointer to
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the arguments to the specific function.
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The .S files for the other calls just #define socket and #include this. */
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.globl P(__,socket)
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ENTRY (P(__,socket))
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/* Save registers. */
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move.l %d2, %a0
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move.l #SYS_ify (socketcall), %d0 /* System call number in %d0. */
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/* Use ## so `socket' is a separate token that might be #define'd. */
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move.l #P (SOCKOP_,socket), %d1 /* Subcode is first arg to syscall. */
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lea 4(%sp), %a1 /* Address of args is 2nd arg. */
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move.l %a1, %d2
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/* Do the system call trap. */
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trap #0
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/* Restore registers. */
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move.l %a0, %d2
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/* %d0 is < 0 if there was an error. */
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tst.l %d0
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jmi syscall_error
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/* Successful; return the syscall's value. */
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rts
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weak_alias (P(__,socket), socket)
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@ -0,0 +1,31 @@
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|||
/* Copyright (C) 1996 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Library General Public License as
|
||||
published by the Free Software Foundation; either version 2 of the
|
||||
License, or (at your option) any later version.
|
||||
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Library General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Library General Public
|
||||
License along with the GNU C Library; see the file COPYING.LIB. If
|
||||
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
||||
Cambridge, MA 02139, USA. */
|
||||
|
||||
#include <sysdep.h>
|
||||
|
||||
.text
|
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SYSCALL_ERROR_HANDLER
|
||||
ENTRY (syscall)
|
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move.l (%sp)+, %a0 /* Pop return address. */
|
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DO_CALL ((%sp), 5) /* Frob the args and do the system call. */
|
||||
tst.l %d0 /* Check %d0 for error. */
|
||||
jmi error /* Jump to error handler if negative. */
|
||||
jmp (%a0) /* Return to caller. */
|
||||
|
||||
error: pea (%a0)
|
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jra syscall_error
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|
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@ -0,0 +1,71 @@
|
|||
/* Copyright (C) 1996 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Library General Public License as
|
||||
published by the Free Software Foundation; either version 2 of the
|
||||
License, or (at your option) any later version.
|
||||
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Library General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Library General Public
|
||||
License along with the GNU C Library; see the file COPYING.LIB. If
|
||||
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
||||
Cambridge, MA 02139, USA. */
|
||||
|
||||
/* Because the Linux version is in fact m68k/ELF and the start.? file
|
||||
for this system (sysdeps/m68k/elf/start.S) is also used by The Hurd
|
||||
and therefore this files must not contain the definition of the
|
||||
`errno' variable (I don't know why, ask Roland), we have to define
|
||||
it somewhere else.
|
||||
|
||||
...and this place is here. */
|
||||
.bss
|
||||
.globl errno
|
||||
.type errno,@object
|
||||
errno: .space 4
|
||||
.size errno,4
|
||||
.globl _errno
|
||||
.type _errno,@object
|
||||
_errno = errno /* This name is expected by hj libc.so.5 startup code. */
|
||||
.text
|
||||
|
||||
/* The following code is not used at all in the shared library.
|
||||
The PIC system call stubs set errno themselves. */
|
||||
|
||||
#ifndef PIC
|
||||
|
||||
#include <sysdep.h>
|
||||
#define _ERRNO_H
|
||||
#include <errnos.h>
|
||||
|
||||
.globl errno
|
||||
.globl __syscall_error
|
||||
|
||||
/* The syscall stubs jump here when they detect an error. */
|
||||
|
||||
.globl __syscall_error
|
||||
__syscall_error:
|
||||
neg.l %d0
|
||||
|
||||
#if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN
|
||||
/* We translate the system's EWOULDBLOCK error into EAGAIN.
|
||||
The GNU C library always defines EWOULDBLOCK==EAGAIN.
|
||||
EWOULDBLOCK_sys is the original number. */
|
||||
move.l #EWOULDBLOCK_sys, %d1
|
||||
cmp.l %d0, %d1
|
||||
jne 1f
|
||||
move.l #EAGAIN, %d0
|
||||
1:
|
||||
#endif
|
||||
|
||||
move.l %d0, errno
|
||||
move.l #-1, %d0
|
||||
/* Copy return value to %a0 for syscalls that are declared to
|
||||
return a pointer. */
|
||||
move.l %d0, %a0
|
||||
rts
|
||||
#endif /* PIC */
|
||||
|
|
@ -0,0 +1,131 @@
|
|||
/* Copyright (C) 1996 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Written by Andreas Schwab, <schwab@issan.informatik.uni-dortmund.de>,
|
||||
December 1995.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Library General Public License as
|
||||
published by the Free Software Foundation; either version 2 of the
|
||||
License, or (at your option) any later version.
|
||||
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Library General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Library General Public
|
||||
License along with the GNU C Library; see the file COPYING.LIB. If
|
||||
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
||||
Cambridge, MA 02139, USA. */
|
||||
|
||||
/* In the Linux/ELF world, C symbols are asm symbols. */
|
||||
#define NO_UNDERSCORES
|
||||
|
||||
#include <sysdeps/unix/sysdep.h>
|
||||
|
||||
#ifdef ASSEMBLER
|
||||
|
||||
#define POUND #
|
||||
|
||||
/* Define an entry point visible from C. */
|
||||
#define ENTRY(name) \
|
||||
.globl name; \
|
||||
.type name, @function; \
|
||||
.align 4; \
|
||||
name##:
|
||||
|
||||
/* Since C identifiers are not normally prefixed with an underscore
|
||||
on this system, the asm identifier `syscall_error' intrudes on the
|
||||
C name space. Make sure we use an innocuous name. */
|
||||
#define syscall_error __syscall_error
|
||||
|
||||
/* Linux uses a negative return value to indicate syscall errors, unlike
|
||||
most Unices, which use the condition codes' carry flag. */
|
||||
#define PSEUDO(name, syscall_name, args) \
|
||||
.text; \
|
||||
SYSCALL_ERROR_HANDLER \
|
||||
ENTRY (name) \
|
||||
DO_CALL (POUND SYS_ify (syscall_name), args); \
|
||||
tst.l %d0; \
|
||||
jmi syscall_error;
|
||||
|
||||
#ifdef PIC
|
||||
/* Store (- %d0) into errno through the GOT. */
|
||||
#define SYSCALL_ERROR_HANDLER \
|
||||
syscall_error: \
|
||||
move.l (errno@GOTPC.l, %pc), %a0; \
|
||||
neg.l %d0; \
|
||||
move.l %d0, (%a0); \
|
||||
move.l POUND -1, %d0; \
|
||||
/* Copy return value to %a0 for syscalls that are declared to return \
|
||||
a pointer (e.g., mmap). */ \
|
||||
move.l %d0, %a0; \
|
||||
rts;
|
||||
#else
|
||||
#define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */
|
||||
#endif
|
||||
|
||||
/* Linux takes system call arguments in registers:
|
||||
|
||||
syscall number %d0 call-clobbered
|
||||
arg 1 %d1 call-clobbered
|
||||
arg 2 %d2 call-saved
|
||||
arg 3 %d3 call-saved
|
||||
arg 4 %d4 call-saved
|
||||
arg 5 %d5 call-saved
|
||||
|
||||
The stack layout upon entering the function is:
|
||||
|
||||
20(%sp) Arg# 5
|
||||
16(%sp) Arg# 4
|
||||
12(%sp) Arg# 3
|
||||
8(%sp) Arg# 2
|
||||
4(%sp) Arg# 1
|
||||
(%sp) Return address
|
||||
|
||||
(Of course a function with say 3 arguments does not have entries for
|
||||
arguments 4 and 5.)
|
||||
|
||||
Separate move's are faster than movem, but need more space. Since
|
||||
speed is more important, we don't use movem. Since %a0 and %a1 are
|
||||
scratch registers, we can use them for saving as well. */
|
||||
|
||||
#define DO_CALL(syscall, args) \
|
||||
move.l syscall, %d0; \
|
||||
DOARGS_##args \
|
||||
trap POUND 0; \
|
||||
UNDOARGS_##args
|
||||
|
||||
#define DOARGS_0 /* No arguments to frob. */
|
||||
#define UNDOARGS_0 /* No arguments to unfrob. */
|
||||
#define _DOARGS_0(n) /* No arguments to frob. */
|
||||
|
||||
#define DOARGS_1 _DOARGS_1 (4)
|
||||
#define _DOARGS_1(n) move.l n(%sp), %d1; _DOARGS_0 (n)
|
||||
#define UNDOARGS_1 UNDOARGS_0
|
||||
|
||||
#define DOARGS_2 _DOARGS_2 (8)
|
||||
#define _DOARGS_2(n) move.l %d2, %a0; move.l n(%sp), %d2; _DOARGS_1 (n-4)
|
||||
#define UNDOARGS_2 UNDOARGS_1; move.l %a0, %d2
|
||||
|
||||
#define DOARGS_3 _DOARGS_3 (12)
|
||||
#define _DOARGS_3(n) move.l %d3, %a1; move.l n(%sp), %d3; _DOARGS_2 (n-4)
|
||||
#define UNDOARGS_3 UNDOARGS_2; move.l %a1, %d3
|
||||
|
||||
#define DOARGS_4 _DOARGS_4 (16)
|
||||
#define _DOARGS_4(n) move.l %d4, -(%sp); move.l n+4(%sp), %d4; _DOARGS_3 (n)
|
||||
#define UNDOARGS_4 UNDOARGS_3; move.l (%sp)+, %d4
|
||||
|
||||
#define DOARGS_5 _DOARGS_5 (20)
|
||||
#define _DOARGS_5(n) move.l %d5, -(%sp); move.l n+4(%sp), %d5; _DOARGS_4 (n)
|
||||
#define UNDOARGS_5 UNDOARGS_4; move.l (%sp)+, %d5
|
||||
|
||||
|
||||
#define ret rts
|
||||
#if 0 /* Not used by Linux */
|
||||
#define r0 %d0
|
||||
#define r1 %d1
|
||||
#define MOVE(x,y) movel x , y
|
||||
#endif
|
||||
|
||||
#endif /* ASSEMBLER */
|
||||
Loading…
Reference in New Issue