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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/makecontext.c
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/makecontext.c')
-rw-r--r--libc/sysdeps/linux/sparc64/makecontext.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/sparc64/makecontext.c b/libc/sysdeps/linux/sparc64/makecontext.c
new file mode 100644
index 000000000..3750f012c
--- /dev/null
+++ b/libc/sysdeps/linux/sparc64/makecontext.c
@@ -0,0 +1,56 @@
+/* Copyright (C) 2001-2017 Free Software Foundation, Inc.
+ Contributed by Jakub Jelinek <jakub@redhat.com>.
+
+ 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 <stdlib.h>
+#include <ucontext.h>
+
+extern void __start_context (struct ucontext *ucp);
+
+void
+__makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...)
+{
+ extern void __makecontext_ret (void);
+ unsigned long *sp, *topsp;
+ va_list ap;
+ int i;
+
+ sp = (unsigned long *) ((long) ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size);
+ sp -= (argc > 6 ? argc : 6) + 32;
+ sp = (unsigned long *) (((long) sp) & -16L);
+ topsp = sp + (argc > 6 ? argc : 6) + 16;
+
+ ucp->uc_mcontext.mc_gregs[MC_PC] = (long) func;
+ ucp->uc_mcontext.mc_gregs[MC_NPC] = ((long) func) + 4;
+ ucp->uc_mcontext.mc_gregs[MC_O6] = ((long) sp) - 0x7ff;
+ ucp->uc_mcontext.mc_gregs[MC_O7] = ((long) __start_context) - 8;
+ ucp->uc_mcontext.mc_fp = ((long) topsp) - 0x7ff;
+ ucp->uc_mcontext.mc_i7 = 0;
+ topsp[14] = 0;
+ topsp[15] = 0;
+ sp[8] = (long) ucp->uc_link;
+ va_start (ap, argc);
+ for (i = 0; i < argc; ++i)
+ if (i < 6)
+ ucp->uc_mcontext.mc_gregs[MC_O0 + i] = va_arg (ap, long);
+ else
+ sp[16 + i] = va_arg (ap, long);
+ va_end (ap);
+}
+
+weak_alias (__makecontext, makecontext)