1 /* Copyright (C) 1997-2014 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Richard Henderson <richard@gnu.ai.mit.edu>, 1997.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
19 /* __brk is a special syscall under Linux since it never returns an
20 error. Instead, the error condition is indicated by returning the old
21 break value (instead of the new, requested one). */
25 #include <bits/errno.h>
32 .type __curbrk,@object
35 .common __curbrk, 8, 8
41 cfi_def_cfa_register(%fp)
43 cfi_register(%o7, %i7)
53 /* All the ways we can fail... */
61 /* Update __curbrk and return cleanly. */
64 sethi %hi(__curbrk), %g1
65 or %g1, %lo(__curbrk), %g1
67 sethi %gdop_hix22(__curbrk), %g1
68 xor %g1, %gdop_lox10(__curbrk), %g1
69 ldx [%l7 + %g1], %g1, %gdop(__curbrk)
74 /* Don't use "ret" cause the preprocessor will eat it. */
78 /* What a horrible way to die. */
79 .Lerr0: set ENOMEM, %o0
81 #ifndef _LIBC_REENTRANT
84 or %g1, %lo(errno), %g1
86 sethi %gdop_hix22(errno), %g1
87 xor %g1, %gdop_lox10(errno), %g1
88 ldx [%l7 + %g1], %g1, %gdop(errno)
93 call HIDDEN_JUMPTARGET(__errno_location)
105 weak_alias (__brk, brk)