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authorBrendan Kehoe <brendan@zen.org>1993-08-26 23:30:59 +0000
committerBrendan Kehoe <brendan@zen.org>1993-08-26 23:30:59 +0000
commitebb0156a4462c998f7e0a6413e6a64ef2f493fa4 (patch)
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parenta13ebb05b8c61e99d5ee122c89313a6b9dfcc054 (diff)
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Diffstat (limited to 'sysdeps/unix/mips/brk.S')
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diff --git a/sysdeps/unix/mips/brk.S b/sysdeps/unix/mips/brk.S
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+/* Copyright (C) 1992 Free Software Foundation, Inc.
+ Contributed by Brendan Kehoe (brendan@zen.org).
+
+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>
+
+#ifndef SYS_brk
+#define SYS_brk 17
+#endif
+
+#ifndef HAVE_GNU_LD
+#define __end end
+#endif
+
+.data
+.sdata
+ENTRY(__curbrk)
+ .word __end
+
+.text
+.set noreorder
+.set noat
+
+ENTRY(__brk)
+ /* Minimum is one page. */
+ lui v0, 4096
+ lw v0, __end
+ nop
+
+ /* If they ask for less than a page, givvem the whole
+ thing anyway. */
+ sltu AT, a0, v0
+ beq AT, zero, down1
+ nop
+ move a0, v0
+down1:
+ li v0, SYS_brk
+ syscall
+ bne a3, zero, error
+
+ /* Update __curbrk and exit cleanly. */
+ lui AT, 4096
+ sw a0, __curbrk
+ j ra
+ move v0, zero
+
+ /* What a horrible way to die. */
+error: j syscall_error
+ nop
+ nop
+ nop