forked from rpms/glibc
82 lines
2.5 KiB
Diff
82 lines
2.5 KiB
Diff
commit 1d9764aba8c00754fbf8299e48afbe222245ee3e
|
|
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
|
|
Date: Wed Aug 4 21:34:12 2021 +0300
|
|
|
|
linux: Add sparck brk implementation
|
|
|
|
It turned that the generic implementation of brk() does not work
|
|
for sparc, since on failure kernel will just return the previous
|
|
input value without setting the conditional register.
|
|
|
|
This patches adds back a sparc32 and sparc64 implementation removed
|
|
by 720480934ab9107.
|
|
|
|
Checked on sparc64-linux-gnu and sparcv9-linux-gnu.
|
|
|
|
(cherry picked from commit 5b86241a032c50462988bdd1439e078384690d34)
|
|
|
|
diff --git a/sysdeps/unix/sysv/linux/sparc/brk.c b/sysdeps/unix/sysv/linux/sparc/brk.c
|
|
new file mode 100644
|
|
index 0000000000000000..aafe9673e3062cf8
|
|
--- /dev/null
|
|
+++ b/sysdeps/unix/sysv/linux/sparc/brk.c
|
|
@@ -0,0 +1,58 @@
|
|
+/* Change data segment. Linux SPARC version.
|
|
+ Copyright (C) 2021 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/>. */
|
|
+
|
|
+#include <errno.h>
|
|
+#include <unistd.h>
|
|
+#include <sysdep.h>
|
|
+
|
|
+/* This must be initialized data because commons can't have aliases. */
|
|
+void *__curbrk = 0;
|
|
+
|
|
+#if HAVE_INTERNAL_BRK_ADDR_SYMBOL
|
|
+/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt
|
|
+ to work around different old braindamage in the old Linux ELF dynamic
|
|
+ linker. */
|
|
+weak_alias (__curbrk, ___brk_addr)
|
|
+#endif
|
|
+
|
|
+#ifdef __arch64__
|
|
+# define SYSCALL_NUM "0x6d"
|
|
+#else
|
|
+# define SYSCALL_NUM "0x10"
|
|
+#endif
|
|
+
|
|
+int
|
|
+__brk (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");
|
|
+ __curbrk = (void *) o0;
|
|
+
|
|
+ if (__curbrk < addr)
|
|
+ {
|
|
+ __set_errno (ENOMEM);
|
|
+ return -1;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+weak_alias (__brk, brk)
|