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authorWaldemar Brodkorb <wbx@openadk.org>2017-05-24 20:49:02 +0200
committerWaldemar Brodkorb <wbx@openadk.org>2017-06-23 23:46:04 +0200
commit041cdc2769407c4d3869b218ad7ee7638e1c306e (patch)
tree1ea25250d74dcb230cf5feee99226fc080dbd678 /libc/sysdeps/linux/sparc64/setjmp.S
parent58a5ba12bffad5916d9897c2870fc483f1db8282 (diff)
sparc64: add basic support
No NPTL, no LDSO support. Bootup with Busybox Ash in Qemu working. Testuite shows only two failures, but mksh continue/break support doesn't work.
Diffstat (limited to 'libc/sysdeps/linux/sparc64/setjmp.S')
-rw-r--r--libc/sysdeps/linux/sparc64/setjmp.S63
1 files changed, 63 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/sparc64/setjmp.S b/libc/sysdeps/linux/sparc64/setjmp.S
new file mode 100644
index 000000000..b30c7d744
--- /dev/null
+++ b/libc/sysdeps/linux/sparc64/setjmp.S
@@ -0,0 +1,63 @@
+/* Copyright (C) 1997-2017 Free Software Foundation, Inc.
+ Contributed by Richard Henderson (rth@tamu.edu).
+
+ 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/>. */
+
+/* __sigsetjmp is implemented in terms of the getcontext trap on
+ Linux/Sparc64. */
+
+#include <sysdep.h>
+
+/* Offsets into the jmp_buf structure. */
+
+#define O_mask_was_saved 512
+#define O_gregs 32
+#define O_g1 (O_gregs + 4*8)
+
+/* int _setjmp(jmp_buf) */
+
+ENTRY(_setjmp)
+ ba __sigsetjmp_local
+ set 0, %o1
+END(_setjmp)
+libc_hidden_def(_setjmp)
+
+/* int setjmp(jmp_buf) */
+
+ENTRY(setjmp)
+ ba,pt %xcc, __sigsetjmp_local
+ set 1, %o1
+END(setjmp)
+
+/* int __sigsetjmp(jmp_buf, savemask) */
+
+ENTRY(__sigsetjmp)
+__sigsetjmp_local:
+
+ /* Record whether the user is intending to save the sigmask. */
+ st %o1, [%o0 + O_mask_was_saved]
+
+ /* Load up our return value, as longjmp is going to override
+ the jmp_buf on its way back. */
+ mov %g0, %g1
+
+ /* And call getcontext! */
+ ta 0x6e
+
+ retl
+ mov %g1, %o0
+
+END(__sigsetjmp)
+libc_hidden_def(__sigsetjmp)