1 /* Copyright (C) 2012 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
20 #include "ucontext_i.h"
25 /* int setcontext (const ucontext_t *ucp) */
30 #if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__
32 /* Following instruction is vldmia r0!, {d8-d15}. */
33 ldc p11, cr8, [r0], #64
34 /* Restore the floating-point status register. */
36 /* Following instruction is fmxr fpscr, r1. */
37 mcr p10, 7, r1, cr1, cr0, 0
42 /* Restore the call-preserved iWMMXt registers. */
43 /* Following instructions are wldrd wr10, [r0], #8 (etc.) */
44 ldcl p1, cr10, [r0], #8
45 ldcl p1, cr11, [r0], #8
46 ldcl p1, cr12, [r0], #8
47 ldcl p1, cr13, [r0], #8
48 ldcl p1, cr14, [r0], #8
49 ldcl p1, cr15, [r0], #8
52 /* Now bring back the signal status. */
54 add r1, r4, #UCONTEXT_SIGMASK
56 bl PLTJMP(sigprocmask)
58 /* Loading r0-r3 makes makecontext easier. */
59 add r14, r4, #MCONTEXT_ARM_R0
61 ldr r13, [r14, #(MCONTEXT_ARM_SP - MCONTEXT_ARM_R0)]
62 add r14, r14, #(MCONTEXT_ARM_LR - MCONTEXT_ARM_R0)
66 weak_alias(__setcontext, setcontext)
68 /* Called when a makecontext() context returns. Start the
69 context in R4 or fall through to exit(). */
72 bne PLTJMP(__setcontext)
74 @ New context was 0 - exit