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- /* brk system call for Linux/SH.
- Copyright (C) 1999-2019 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/>. */
- #include <errno.h>
- #include <unistd.h>
- #include <sysdep.h>
- /* This must be initialized data because commons can't have aliases. */
- void *__curbrk = 0;
- int
- __brk (void *addr)
- {
- void *newbrk;
- register long r3 asm ("%r3") = SYS_ify (brk);
- register long r4 asm ("%r4") = (long)addr;
- asm volatile ("trapa #0x11\n\t" SYSCALL_INST_PAD
- : "=z"(newbrk)
- : "r" (r3), "r" (r4));
- __curbrk = newbrk;
- if (newbrk < addr)
- {
- __set_errno (ENOMEM);
- return -1;
- }
- return 0;
- }
- weak_alias (__brk, brk)
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