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authorVincent Ren-Wei Chen <vincentc@andestech.com>2017-01-17 07:31:24 +0100
committerWaldemar Brodkorb <wbx@openadk.org>2017-01-22 10:06:29 +0100
commit6af3332a4cbd1ffbc81f74759ef7c5e1a87d2e10 (patch)
tree4deae5f23fd1e2664f21c09dfb57fda799dffd10 /libc/sysdeps/linux/nds32/makecontext.c
parent82af21a60bc6e53dd92c1c140f20179d2ae4ad40 (diff)
nds32: add NPTL/TLS, *context function, libm changes and code cleanup
This commit includes following features. 1. Support NPTL/TLS 2. Add libm function which is used to handle FP rounding and excpetions (ex: fclrexcpt,fedisblxcpti,feenablxcpt... ) 3. Add *context function for operating user context (ex: setcontext,getcontext,makecontext... ) 4. Change the return flow from signal handler 5. Cleanup of old code The testsuite only has 2 errors, tst-cpuclock1 and tst-cputimer1, which are related to timing accuracy. (math and locale tests are disabled) Signed-off-by: Vincent Ren-Wei Chen <vincentc@andestech.com>
Diffstat (limited to 'libc/sysdeps/linux/nds32/makecontext.c')
-rw-r--r--libc/sysdeps/linux/nds32/makecontext.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/nds32/makecontext.c b/libc/sysdeps/linux/nds32/makecontext.c
new file mode 100644
index 000000000..d8f38aa15
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/makecontext.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Copyright (C) 2011-2013 Free Software Foundation, Inc.
+ Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
+
+ 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 <stdarg.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <ucontext.h>
+
+/* makecontext sets up a stack and the registers for the
+ user context. The stack looks like this:
+
+ +-----------------------+
+ | padding as required |
+ +-----------------------+
+ sp -> | parameter 7-n |
+ +-----------------------+
+
+ The registers are set up like this:
+ $r0 .. $r5: parameter 1 to 6
+ $r6 : uc_link
+ $sp : stack pointer.
+*/
+void
+__makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...)
+{
+ extern void __startcontext (void);
+ unsigned long int *sp;
+ unsigned long *regptr;
+ va_list ap;
+ int i;
+
+ sp = (unsigned long int *)
+ ((uintptr_t) ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size);
+
+ /* Allocate stack arguments. */
+ sp -= argc < 6 ? 0 : argc - 6;
+
+ /* Keep the stack aligned. */
+ sp = (unsigned long int *) (((uintptr_t) sp) & -8L);
+
+ ucp->uc_mcontext.nds32_r6 = (uintptr_t) ucp->uc_link;
+ ucp->uc_mcontext.nds32_sp = (uintptr_t) sp;
+ ucp->uc_mcontext.nds32_ipc = (uintptr_t) func;
+ ucp->uc_mcontext.nds32_lp = (uintptr_t) &__startcontext;
+
+ va_start (ap, argc);
+ regptr = &ucp->uc_mcontext.nds32_r0;
+ for (i = 0; i < argc; ++i)
+ if (i < 6)
+ *regptr++ = va_arg (ap, unsigned long int);
+ else
+ sp[i - 6] = va_arg (ap, unsigned long int);
+
+ va_end (ap);
+
+}
+weak_alias (__makecontext, makecontext)