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ac57a943 | 1 | /* Definitions for Rs6000 running LynxOS. |
a5544970 | 2 | Copyright (C) 1995-2019 Free Software Foundation, Inc. |
ac57a943 | 3 | Contributed by David Henkel-Wallace, Cygnus Support (gumby@cygnus.com) |
4f587cb0 | 4 | Rewritten by Adam Nemet, LynuxWorks Inc. |
ac57a943 | 5 | |
5de601cf | 6 | This file is part of GCC. |
ac57a943 | 7 | |
5de601cf NC |
8 | GCC is free software; you can redistribute it and/or modify it |
9 | under the terms of the GNU General Public License as published | |
2f83c7d6 | 10 | by the Free Software Foundation; either version 3, or (at your |
5de601cf | 11 | option) any later version. |
ac57a943 | 12 | |
5de601cf NC |
13 | GCC is distributed in the hope that it will be useful, but WITHOUT |
14 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
16 | License for more details. | |
ac57a943 | 17 | |
5de601cf | 18 | You should have received a copy of the GNU General Public License |
2f83c7d6 NC |
19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
ac57a943 | 21 | |
4f587cb0 AN |
22 | /* Undefine the definition to enable the LynxOS default from the |
23 | top-level lynx.h. */ | |
24 | ||
25 | #undef SUBTARGET_EXTRA_SPECS | |
26 | ||
27 | /* Get rid off the spec definitions from rs6000/sysv4.h. */ | |
ac57a943 | 28 | |
4f587cb0 AN |
29 | #undef CPP_SPEC |
30 | #define CPP_SPEC \ | |
31 | "%{msoft-float: -D_SOFT_FLOAT} \ | |
32 | %(cpp_cpu) \ | |
33 | %(cpp_os_lynx)" | |
ac57a943 | 34 | |
4f587cb0 AN |
35 | /* LynxOS only supports big-endian on PPC so we override the |
36 | definition from sysv4.h. Since the LynxOS 4.0 compiler was set to | |
37 | return every structure in memory regardless of their size we have | |
38 | to emulate the same behavior here with disabling the SVR4 structure | |
39 | returning. */ | |
ac57a943 | 40 | |
4f587cb0 AN |
41 | #undef CC1_SPEC |
42 | #define CC1_SPEC \ | |
43 | "%{G*} %{mno-sdata:-msdata=none} \ | |
44 | %{maltivec:-mabi=altivec} \ | |
0fd7e0f8 | 45 | -maix-struct-return" |
ac57a943 | 46 | |
4f587cb0 AN |
47 | #undef ASM_SPEC |
48 | #define ASM_SPEC \ | |
49 | "%(asm_cpu) \ | |
48137d59 | 50 | %{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}}" |
4f587cb0 AN |
51 | |
52 | #undef STARTFILE_SPEC | |
ac57a943 | 53 | #undef ENDFILE_SPEC |
4f587cb0 AN |
54 | #undef LIB_SPEC |
55 | #undef LINK_SPEC | |
56 | #define LINK_SPEC \ | |
57 | "%{!msdata=none:%{G*}} %{msdata=none:-G0} \ | |
58 | %(link_os_lynx)" | |
59 | ||
60 | /* Override the definition from sysv4.h. */ | |
61 | ||
62 | #undef TARGET_OS_CPP_BUILTINS | |
63 | #define TARGET_OS_CPP_BUILTINS() \ | |
64 | do \ | |
65 | { \ | |
66 | builtin_define ("__BIG_ENDIAN__"); \ | |
67 | builtin_define ("__powerpc__"); \ | |
68 | builtin_assert ("cpu=powerpc"); \ | |
69 | builtin_assert ("machine=powerpc"); \ | |
70 | builtin_define ("__PPC__"); \ | |
71 | } \ | |
72 | while (0) | |
73 | ||
4f587cb0 AN |
74 | /* LynxOS does not do anything with .fixup plus let's not create |
75 | writable section for linkonce.r and linkonce.t. */ | |
76 | ||
77 | #undef RELOCATABLE_NEEDS_FIXUP | |
78 | ||
79 | /* Override these from rs6000.h with the generic definition. */ | |
80 | ||
81 | #undef SIZE_TYPE | |
82 | #undef ASM_OUTPUT_ALIGN | |
83 | #undef PREFERRED_DEBUGGING_TYPE | |
84 | ||
85 | /* The file rs6000.c defines TARGET_HAVE_TLS unconditionally to the | |
86 | value of HAVE_AS_TLS. HAVE_AS_TLS is true as gas support for TLS | |
87 | is detected by configure. Override the definition to false. */ | |
ac57a943 | 88 | |
4f587cb0 AN |
89 | #undef HAVE_AS_TLS |
90 | #define HAVE_AS_TLS 0 | |
5e5cbbfb | 91 | |
3d36d470 UW |
92 | /* Use standard DWARF numbering for DWARF debugging information. */ |
93 | #define RS6000_USE_DWARF_NUMBERING | |
a1cd969e | 94 | |
5e5cbbfb AN |
95 | #ifdef CRT_BEGIN |
96 | /* This function is part of crtbegin*.o which is at the beginning of | |
97 | the link and is called from .fini which is usually toward the end | |
98 | of the executable. Make it longcall so that we don't limit the | |
99 | text size of the executables to 32M. */ | |
100 | ||
101 | static void __do_global_dtors_aux (void) __attribute__ ((longcall)); | |
102 | #endif /* CRT_BEGIN */ | |
103 | ||
104 | #ifdef CRT_END | |
105 | /* Similarly here. This function resides in crtend*.o which is toward | |
106 | to end of the link and is called from .init which is at the | |
107 | beginning. */ | |
108 | ||
109 | static void __do_global_ctors_aux (void) __attribute__ ((longcall)); | |
110 | #endif /* CRT_END */ |