1#
2# SPDX-License-Identifier: BSD-3-Clause
3#
4# Copyright © 2021 Keith Packard
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions
8# are met:
9#
10# 1. Redistributions of source code must retain the above copyright
11#    notice, this list of conditions and the following disclaimer.
12#
13# 2. Redistributions in binary form must reproduce the above
14#    copyright notice, this list of conditions and the following
15#    disclaimer in the documentation and/or other materials provided
16#    with the distribution.
17#
18# 3. Neither the name of the copyright holder nor the names of its
19#    contributors may be used to endorse or promote products derived
20#    from this software without specific prior written permission.
21#
22# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
27# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
28# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
29# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
31# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
33# OF THE POSSIBILITY OF SUCH DAMAGE.
34#
35
36lib_semihost_srcs = [
37  'e9_exit.c',
38  'e9_kill.c',
39  'e9_stub.c',
40  ]
41
42if tinystdio
43  lib_semihost_srcs += 'e9_io.c'
44endif
45
46has_semihost = true
47
48objcopy = find_program('objcopy', required: false)
49
50foreach target : targets
51  value = get_variable('target_' + target)
52
53  instdir = join_paths(lib_dir, value[0])
54
55  if target == ''
56    libsemihost_name = 'semihost'
57  else
58    libsemihost_name = join_paths(target, 'libsemihost')
59  endif
60
61  local_lib_semihost_target = static_library(libsemihost_name,
62				       lib_semihost_srcs,
63				       install : true,
64				       install_dir : instdir,
65				       include_directories : inc,
66				       c_args : value[1],
67				       pic: false)
68
69  set_variable('lib_semihost' + target, local_lib_semihost_target)
70
71endforeach
72
73if objcopy.found()
74  # Stub BIOS which provides a jump instruction at the CPU start
75  # address (0xfffffff0) to get us to our default start address at 1MB
76  # (0x100000)
77
78  bios_ld = '@0@/@1@'.format(meson.current_source_dir(), 'bios.ld')
79  bios = executable('bios', 'bios.S',
80		    c_args: ['-m32'],
81		    link_args: ['-nostdlib', '-m32', '-Wl,--build-id=none', '-T', bios_ld])
82
83  bios_bin = custom_target('bios.bin',
84		           build_by_default: true,
85		           input: bios,
86		           install: true,
87		           install_dir: instdir,
88		           output: 'bios.bin',
89		           command: [objcopy, '-O', 'binary', '@INPUT@', '@OUTPUT@'])
90endif
91
92