1 /* Copyright (C) 1997-2017 Free Software Foundation, Inc.
2 Contributed by Richard Henderson <richard@gnu.ai.mit.edu>, 1997.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
18 /* __brk is a special syscall under Linux since it never returns an
19 error. Instead, the error condition is indicated by returning the old
20 break value (instead of the new, requested one). */
24 #include <bits/errno.h>
31 .type __curbrk,@object
34 .common __curbrk, 8, 8
40 cfi_def_cfa_register(%fp)
42 cfi_register(%o7, %i7)
52 /* All the ways we can fail... */
60 /* Update __curbrk and return cleanly. */
63 sethi %hi(__curbrk), %g1
64 or %g1, %lo(__curbrk), %g1
66 sethi %gdop_hix22(__curbrk), %g1
67 xor %g1, %gdop_lox10(__curbrk), %g1
68 ldx [%l7 + %g1], %g1, %gdop(__curbrk)
73 /* Don't use "ret" cause the preprocessor will eat it. */
77 /* What a horrible way to die. */
78 .Lerr0: set ENOMEM, %o0
80 #ifndef _LIBC_REENTRANT
83 or %g1, %lo(errno), %g1
85 sethi %gdop_hix22(errno), %g1
86 xor %g1, %gdop_lox10(errno), %g1
87 ldx [%l7 + %g1], %g1, %gdop(errno)
91 call HIDDEN_JUMPTARGET(__errno_location)
100 weak_alias (__brk, brk)