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5bb17da079
mark asm input operand as clobbered. * sysdeps/unix/sysv/linux/m68k/brk.c (__brk): Likewise.
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/* brk system call for Linux/m68k.
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Copyright (C) 1996, 1997 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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 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 = 0;
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/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt
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to work around different old braindamage in the old Linux/x86 ELF
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dynamic linker. Sigh. */
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weak_alias (__curbrk, ___brk_addr)
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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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: "%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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__set_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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