bsd-user: Implement target_set_brk function in bsd-mem.c instead of os-syscall.c

The definitions and variables names matches the corresponding ones in
linux-user/syscall.c, for making later implementation of do_obreak easier

Co-authored-by: Mikaël Urankar <mikael.urankar@gmail.com>
Signed-off-by: Mikaël Urankar <mikael.urankar@gmail.com>
Signed-off-by: Karim Taha <kariem.taha2.7@gmail.com>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230925182709.4834-9-kariem.taha2.7@gmail.com>

bsd-user/bsd-mem.c

@@ -0,0 +1,32 @@
+/*
+ *  memory management system conversion routines
+ *
+ *  Copyright (c) 2013 Stacey D. Son
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include "qemu/osdep.h"
+#include "qemu.h"
+#include "qemu-bsd.h"
+
+struct bsd_shm_regions bsd_shm_regions[N_BSD_SHM_REGIONS];
+
+abi_ulong target_brk;
+abi_ulong initial_target_brk;
+
+void target_set_brk(abi_ulong new_brk)
+{
+    target_brk = TARGET_PAGE_ALIGN(new_brk);
+    initial_target_brk = target_brk;
+}

bsd-user/freebsd/os-syscall.c

@@ -67,10 +67,6 @@ safe_syscall4(pid_t, wait4, pid_t, wpid, int *, status, int, options,
 safe_syscall6(pid_t, wait6, idtype_t, idtype, id_t, id, int *, status, int,
     options, struct __wrusage *, wrusage, siginfo_t *, infop);
 
-void target_set_brk(abi_ulong new_brk)
-{
-}
-
 /*
  * errno conversion.
  */