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author | Andreas Schwab <schwab@linux-m68k.org> | 2014-02-10 20:05:01 +0100 |
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committer | Andreas Schwab <schwab@linux-m68k.org> | 2014-02-10 20:22:40 +0100 |
commit | 73588a7223bec40d652fd4c75f1cb4772c5d2612 (patch) | |
tree | dfc1f1965e78e62e611199d91c482d1b76ff109d /sysdeps/m68k/stackinfo.h | |
parent | 87569616d27a2c742f87b5dbcac2f2e3437fd874 (diff) | |
download | glibc-73588a7223bec40d652fd4c75f1cb4772c5d2612.zip glibc-73588a7223bec40d652fd4c75f1cb4772c5d2612.tar.gz glibc-73588a7223bec40d652fd4c75f1cb4772c5d2612.tar.bz2 |
Move m68k from ports to libc
Diffstat (limited to 'sysdeps/m68k/stackinfo.h')
-rw-r--r-- | sysdeps/m68k/stackinfo.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/sysdeps/m68k/stackinfo.h b/sysdeps/m68k/stackinfo.h new file mode 100644 index 0000000..7ad911f --- /dev/null +++ b/sysdeps/m68k/stackinfo.h @@ -0,0 +1,41 @@ +/* Copyright (C) 1999-2014 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 Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +/* This file contains a bit of information about the stack allocation + of the processor. */ + +#ifndef _STACKINFO_H +#define _STACKINFO_H 1 + +#include <elf.h> + +/* On m68k the stack grows down. */ +#define _STACK_GROWS_DOWN 1 + +/* Default to an executable stack. PF_X can be overridden if PT_GNU_STACK + is present, but it is presumed absent. */ +#define DEFAULT_STACK_PERMS (PF_R|PF_W|PF_X) + +/* Access to the stack pointer. */ +#define stackinfo_get_sp() \ + ({ void *p__; asm volatile ("move.l %%sp, %0" : "=r" (p__)); p__; }) +#define stackinfo_sub_sp(ptr) \ + ({ ptrdiff_t d__; \ + asm volatile ("sub.l %%sp, %0" : "=r" (d__) : "0" (ptr)); \ + d__; }) + +#endif /* stackinfo.h */ |