1 /* Definitions of target machine for GNU compiler.
2 Motorola m88100 running the AT&T/Unisoft/Motorola V.3 reference port.
3 Copyright (C) 1990, 1991 Free Software Foundation, Inc.
4 Contributed by Ray Essick (ressick@mot.com)
5 Enhanced by Tom Wood (Tom_Wood@NeXT.com)
7 This file is part of GNU CC.
9 GNU CC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GNU CC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GNU CC; see the file COPYING. If not, write to
21 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
23 #include "m88k/m88k.h"
25 /* Default switches */
27 #define TARGET_DEFAULT (MASK_CHECK_ZERO_DIV | \
28 MASK_OCS_DEBUG_INFO | \
29 MASK_OCS_FRAME_POSITION)
31 /* Macros to be automatically defined. */
33 #define CPP_PREDEFINES "-Dm88000 -Dm88k -Dunix -DsysV88 -D__CLASSIFY_TYPE__=2 -Asystem(unix) -Asystem(svr3) -Acpu(m88k) -Amachine(m88k)"
35 /* Override svr3.h to link with ?crt0.o instead of ?crt1.o and ?crtn.o.
36 From arul@sdsu.edu. */
38 #define STARTFILE_SPEC \
39 "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}} crtbegin.o%s"
41 /* Profiled libraries live in a different directory but keep the same
42 names other than that. arul@sdsu.edu says -lg is always needed. */
44 #define LIB_SPEC "%{p:-L/lib/libp}%{pg:%{!p:-L/lib/libp}} -lg -lc crtend.o%s"
46 /* Hot version of the profiler that uses r10 to pass the address of
47 the counter. the _gcc_mcount routine knows not to screw with
48 the parameter registers.
50 DG/UX does this; i wrote a gnu-c/88k specific version and put it
51 in libgcc2.c -- RBE; this macro knows about the leading underscore
53 #undef FUNCTION_PROFILER
54 #define FUNCTION_PROFILER(FILE, LABELNO) \
55 output_function_profiler (FILE, LABELNO, "_gcc_mcount", 0)
57 /* Various other changes that we want to have in place without
58 too many changes to the m88k.h file. */
62 /* Define a few machine-specific details of the implementation of
65 /* Although the .init section is used, it is not automatically invoked. */
68 /* State that atexit exists so __do_global_ctors will register
72 #define CTOR_LIST_BEGIN \
73 asm (INIT_SECTION_ASM_OP); \
74 asm ("\tsubu\t r31,r31,16"); /* (STACK_BOUNDARY / BITS_PER_UNIT) == 16 */ \
75 asm ("\tst\t r0,r31,32"); /* REG_PARM_STACK_SPACE (0) == 32 */
78 /* ASM_OUTPUT_CONSTRUCTOR outputs code into the .init section to push the
79 address of the constructor. This becomes the body of __do_global_ctors
80 in crtstuff.c. r13 is a temporary register. */
81 #undef ASM_OUTPUT_CONSTRUCTOR
82 #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
85 fprintf (FILE, "\tor.u\t r13,r0,hi16("); \
86 assemble_name (FILE, NAME); \
87 fprintf (FILE, ")\n\tor\t r13,r13,lo16("); \
88 assemble_name (FILE, NAME); \
89 fprintf (FILE, ")\n\tsubu\t r31,r31,%d\n\tst\t r13,r31,%d\n", \
90 STACK_BOUNDARY / BITS_PER_UNIT, REG_PARM_STACK_SPACE (0)); \
93 #undef DO_GLOBAL_CTORS_BODY
94 #define DO_GLOBAL_CTORS_BODY \
96 func_ptr *__CTOR_LIST__ = __builtin_alloca (0), *p; \
97 for (p = __CTOR_LIST__; *p; p += 4) \
101 #define DTOR_LIST_BEGIN \
102 asm (FINI_SECTION_ASM_OP); \
103 func_ptr __DTOR_LIST__[4] = { (func_ptr) (-1), (func_ptr) (-1), \
104 (func_ptr) (-1), (func_ptr) (-1) }
105 #define DTOR_LIST_END \
106 asm (FINI_SECTION_ASM_OP); \
107 func_ptr __DTOR_END__[4] = { (func_ptr) 0, (func_ptr) 0, \
108 (func_ptr) 0, (func_ptr) 0 }
110 /* A C statement (sans semicolon) to output an element in the table of
111 global destructors. The table is constructed in the .fini section
112 so that an explicit linker script is not required. The complication
113 is that this section is padded with NOP instructions and to either
114 8 or 16 byte alignment depending on the specific system. A clever
115 way to avoid trouble is to output a block of 16 bytes where the
116 extra words are known values (-1). */
117 #undef ASM_OUTPUT_DESTRUCTOR
118 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
122 fprintf (FILE, "\t%s\t ", ASM_LONG); \
123 assemble_name (FILE,NAME); \
124 fprintf (FILE, "\n"); \
125 for (i = 1; i < 4; i++) \
126 fprintf (FILE, "\t%s\t -1\n", ASM_LONG); \
129 /* Walk the list looking for the terminating zero and ignoring all values of
131 #undef DO_GLOBAL_DTORS_BODY
132 #define DO_GLOBAL_DTORS_BODY \
135 for (i = 0; __DTOR_LIST__[i] != 0; i++) \
136 if (((int *)__DTOR_LIST__)[i] != -1) \
137 __DTOR_LIST__[i] (); \