Linux: Introduce __brk_call for invoking the brk system call

Alpha and sparc can now use the generic implementation.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 35 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/sparc/brk_call.h b/sysdeps/unix/sysv/linux/sparc/brk_call.h
new file mode 100644
index 0000000000..59ce521660
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sparc/brk_call.h
@@ -0,0 +1,35 @@
+/* Invoke the brk system call.  Sparc version.
+   Copyright (C) 2022 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
+   <https://www.gnu.org/licenses/>.  */
+
+#ifdef __arch64__
+# define SYSCALL_NUM "0x6d"
+#else
+# define SYSCALL_NUM "0x10"
+#endif
+
+static inline void *
+__brk_call (void *addr)
+{
+  register long int g1 asm ("g1") = __NR_brk;
+  register long int o0 asm ("o0") = (long int) addr;
+  asm volatile ("ta " SYSCALL_NUM
+		: "=r"(o0)
+		: "r"(g1), "0"(o0)
+		: "cc");
+  return (void *) o0;
+}