Mercurial > hg > xemacs-beta
annotate src/alloca.s @ 5518:3cc7470ea71c
gnuclient: if TMPDIR was set and connect failed, try again with /tmp
2011-06-03 Aidan Kehoe <kehoea@parhasard.net>
* gnuslib.c (connect_to_unix_server):
Retry with /tmp as a directory in which to search for Unix sockets
if an attempt to connect with some other directory failed (which
may be because gnuclient and gnuserv don't share an environment
value for TMPDIR, or because gnuserv was compiled with USE_TMPDIR
turned off).
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Fri, 03 Jun 2011 18:40:57 +0100 |
| parents | 308d34e9f07d |
| children |
| rev | line source |
|---|---|
| 428 | 1 /* `alloca' standard 4.2 subroutine for 68000's and 16000's and others. |
| 2 Copyright (C) 1985, 1986, 1988 Free Software Foundation, Inc. | |
| 3 | |
| 4 This file is part of XEmacs. | |
| 5 | |
|
5402
308d34e9f07d
Changed bulk of GPLv2 or later files identified by script
Mats Lidell <matsl@xemacs.org>
parents:
4759
diff
changeset
|
6 XEmacs is free software: you can redistribute it and/or modify it |
| 428 | 7 under the terms of the GNU General Public License as published by the |
|
5402
308d34e9f07d
Changed bulk of GPLv2 or later files identified by script
Mats Lidell <matsl@xemacs.org>
parents:
4759
diff
changeset
|
8 Free Software Foundation, either version 3 of the License, or (at your |
|
308d34e9f07d
Changed bulk of GPLv2 or later files identified by script
Mats Lidell <matsl@xemacs.org>
parents:
4759
diff
changeset
|
9 option) any later version. |
| 428 | 10 |
| 11 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU General Public License | |
|
5402
308d34e9f07d
Changed bulk of GPLv2 or later files identified by script
Mats Lidell <matsl@xemacs.org>
parents:
4759
diff
changeset
|
17 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 428 | 18 |
| 19 /* Synched up with: FSF 19.30. */ | |
| 20 | |
| 21 /* Both 68000 systems I have run this on have had broken versions of alloca. | |
| 22 Also, I am told that non-berkeley systems do not have it at all. | |
| 23 So replace whatever system-provided alloca there may be | |
| 24 on all 68000 systems. */ | |
| 25 | |
| 26 #define NOT_C_CODE | |
| 27 #ifdef emacs | |
| 28 #include <config.h> | |
| 29 #else | |
| 30 #include "config.h" | |
| 31 #endif | |
| 32 | |
| 33 #ifndef HAVE_ALLOCA /* define this to use system's alloca */ | |
| 34 | |
| 35 #ifndef m68k | |
| 36 #ifndef m68000 | |
| 37 you | |
| 38 lose!! | |
| 39 #endif /* m68000 */ | |
| 40 #endif /* m68k */ | |
| 41 | |
| 42 | |
| 43 #ifdef m68k /* SGS assembler totally different */ | |
| 44 file "alloca.s" | |
| 45 global alloca | |
| 46 alloca: | |
| 47 mov.l (%sp)+,%a1 # pop return addr from top of stack | |
| 48 mov.l (%sp)+,%d0 # pop size in bytes from top of stack | |
| 49 add.l &R%1,%d0 # round size up to long word | |
| 50 and.l &-4,%d0 # mask out lower two bits of size | |
| 51 sub.l %d0,%sp # allocate by moving stack pointer | |
| 52 tst.b P%1(%sp) # stack probe to allocate pages | |
| 53 mov.l %sp,%a0 # return pointer as pointer | |
| 54 mov.l %sp,%d0 # return pointer as int to avoid disaster | |
| 55 add.l &-4,%sp # new top of stack | |
| 56 jmp (%a1) # not a normal return | |
| 57 set S%1,64 # safety factor for C compiler scratch | |
| 58 set R%1,3+S%1 # add to size for rounding | |
| 59 set P%1,-132 # probe this far below current top of stack | |
| 60 | |
| 61 #else /* not m68k */ | |
| 62 | |
| 63 #ifdef m68000 | |
| 64 | |
| 65 /* Some systems want the _, some do not. Win with both kinds. */ | |
| 66 .globl _alloca | |
| 67 _alloca: | |
| 68 .globl alloca | |
| 69 alloca: | |
| 70 movl sp@+,a0 | |
| 71 movl a7,d0 | |
| 72 subl sp@,d0 | |
| 73 andl #~3,d0 | |
| 74 movl d0,sp | |
| 75 tstb sp@(0) /* Make stack pages exist */ | |
| 76 /* Needed on certain systems | |
| 77 that lack true demand paging */ | |
| 78 addql #4,d0 | |
| 79 jmp a0@ | |
| 80 | |
| 81 #endif /* m68000 */ | |
| 82 #endif /* not m68k */ | |
| 83 | |
| 84 #endif /* not HAVE_ALLOCA */ |