1 /* libgcc routines for RL78
2 Copyright (C) 2011-2013 Free Software Foundation, Inc.
3 Contributed by Red Hat.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published
9 by the Free Software Foundation; either version 3, or (at your
10 option) any later version.
12 GCC is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 License for more details.
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
26 /* RL78 Trampoline support
28 Since the RL78's RAM is not in the first 64k, we cannot "just" use a
29 function pointer to point to a trampoline on the stack. So, we
30 create N fixed trampolines that read from an array, and allocate
45 .type trampoline_\n, @function
46 movw ax, !trampoline_chain_\n
48 movw ax, !trampoline_addr_\n
50 .size trampoline_\n, .-trampoline_\n
79 /* Given the function pointer in R8 and the static chain
80 pointer in R10, allocate a trampoline and return its address in
84 .global ___trampoline_init
85 .type ___trampoline_init, @function
88 movw hl, #trampoline_array
90 movw ax, [hl + TO_ADDR]
97 cmpw ax, #trampoline_array_end
102 movw [hl + TO_ADDR], ax
104 movw [hl + TO_CHAIN], ax
106 movw [hl + TO_FRAME], ax
108 movw ax, [hl + TO_STUB]
112 .size ___trampoline_init, . - ___trampoline_init
114 .global ___trampoline_uninit
115 .type ___trampoline_uninit, @function
116 ___trampoline_uninit:
117 movw hl, #trampoline_array
121 movw ax, [hl + TO_FRAME]
126 movw [hl + TO_ADDR], ax
132 cmpw ax, #trampoline_array_end
136 .size ___trampoline_uninit, . - ___trampoline_uninit