1 /* Target definitions for GNU compiler for Sparc running System V.4
2 Copyright (C) 1991, 1992 Free Software Foundation, Inc.
4 Written by Ron Guilmette (rfg@ncd.com).
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
24 /* Undefine some symbols which are defined in "sparc.h" but which are
25 appropriate only for SunOS 4.x, and not for svr4. */
27 #undef DBX_DEBUGGING_INFO
28 #undef WORD_SWITCH_TAKES_ARG
30 #undef ASM_DECLARE_FUNCTION_NAME
31 #undef TEXT_SECTION_ASM_OP
32 #undef DATA_SECTION_ASM_OP
36 /* Undefined some symbols which are defined in "svr4.h" but which are
37 appropriate only for typical svr4 systems, but not for the specific
38 case of svr4 running on a Sparc. */
40 #undef CTORS_SECTION_ASM_OP
41 #undef DTORS_SECTION_ASM_OP
42 #undef INIT_SECTION_ASM_OP
43 #undef CONST_SECTION_ASM_OP
44 #undef TYPE_OPERAND_FMT
45 #undef PUSHSECTION_FORMAT
50 /* Provide a set of pre-definitions and pre-assertions appropriate for
51 the Sparc running svr4. __svr4__ is our extension. */
53 #define CPP_PREDEFINES \
54 "-Dsparc -Dunix -D__svr4__ -Asystem(unix) -Acpu(sparc) -Amachine(sparc)"
56 /* The specialized code which needs to appear in the .init section prior
57 to the prologue code for `__do_global_ctors' (see crtstuff.c).
59 On Sparcs running svr4, the /usr/ccs/lib/crti.o file (with gets linked
60 in prior to the crtbegin.o file) has a single `save' instruction in its
61 .init section. That `save' instruction tries to setup a stack frame for
62 the sake of any subsequent code in the .init section. Unfortunately,
63 the size it uses for the stack frame is only a guess, and is not really
64 adequate for our purposes. More importantly, we independently put our
65 own standard function prologue (for __do_global_ctors) into the .init
66 section and that function prologue includes its own `save' instruction!
67 Thus, unless we do something to correct the situation, we'll get *two*
68 stack frames allocated when crt0.o calls the code in the .init section,
69 and havoc will ensue. The following macro definition prevents such woes.
72 #define INIT_SECTION_PREAMBLE asm ("restore")
74 /* This is the string used to begin an assembly language comment for the
75 Sparc/svr4 assembler. */
77 #define ASM_COMMENT_START "!"
79 /* Define the names of various pseudo-op used by the Sparc/svr4 assembler.
80 Note that many of these are different from the typical pseudo-ops used
81 by most svr4 assemblers. That is probably due to a (misguided?) attempt
82 to keep the Sparc/svr4 assembler somewhat compatible with the Sparc/SunOS
85 #define STRING_ASM_OP ".asciz"
86 #define COMMON_ASM_OP ".common"
87 #define SKIP_ASM_OP ".skip"
88 #define UNALIGNED_INT_ASM_OP ".uaword"
89 #define UNALIGNED_SHORT_ASM_OP ".uahalf"
90 #define PUSHSECTION_ASM_OP ".pushsection"
91 #define POPSECTION_ASM_OP ".popsection"
93 /* This is the format used to print the second operand of a .type pseudo-op
94 for the Sparc/svr4 assembler. */
96 #define TYPE_OPERAND_FMT "#%s"
98 /* This is the format used to print a .pushsection pseudo-op (and its operand)
99 for the Sparc/svr4 assembler. */
101 #define PUSHSECTION_FORMAT "\t%s\t\"%s\"\n"
103 #undef ASM_OUTPUT_CASE_LABEL
104 #define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, JUMPTABLE) \
105 do { ASM_OUTPUT_ALIGN ((FILE), 2); \
106 ASM_OUTPUT_INTERNAL_LABEL ((FILE), PREFIX, NUM); \
109 /* This is how to equate one symbol to another symbol. The syntax used is
110 `SYM1=SYM2'. Note that this is different from the way equates are done
111 with most svr4 assemblers, where the syntax is `.set SYM1,SYM2'. */
113 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
114 do { fprintf ((FILE), "\t"); \
115 assemble_name (FILE, LABEL1); \
116 fprintf (FILE, " = "); \
117 assemble_name (FILE, LABEL2); \
118 fprintf (FILE, "\n"); \
121 /* Define how the Sparc registers should be numbered for Dwarf output.
122 The numbering provided here should be compatible with the native
123 svr4 SDB debugger in the Sparc/svr4 reference port. The numbering
126 Assembly name gcc internal regno Dwarf regno
127 ----------------------------------------------------------
135 #define DBX_REGISTER_NUMBER(REGNO) \
136 (((REGNO) < 32) ? (REGNO) \
137 : ((REGNO) < 63) ? ((REGNO) + 8) \
140 /* A set of symbol definitions for assembly pseudo-ops which will
141 get us switched to various sections of interest. These are used
142 in all places where we simply want to switch to a section, and
143 *not* to push the previous section name onto the assembler's
144 section names stack (as we do often in dwarfout.c). */
146 #define TEXT_SECTION_ASM_OP ".section\t\".text\""
147 #define DATA_SECTION_ASM_OP ".section\t\".data\""
148 #define BSS_SECTION_ASM_OP ".section\t\".bss\""
149 #define CONST_SECTION_ASM_OP ".section\t\".rodata\""
150 #define INIT_SECTION_ASM_OP ".section\t\".init\",#alloc"
151 #define CTORS_SECTION_ASM_OP ".section\t\".ctors\",#alloc"
152 #define DTORS_SECTION_ASM_OP ".section\t\".dtors\",#alloc"
154 /* Code to handle #pragma directives. The interface is a bit messy,
155 but there's no simpler way to do this while still using yylex. */
156 #define HANDLE_PRAGMA(FILE) \
158 while (c == ' ' || c == '\t') \
160 if (c == '\n' || c == EOF) \
162 handle_pragma_token (0, 0); \
172 handle_pragma_token (token_buffer, yylval.ttype); \
175 handle_pragma_token (token_buffer, 0); \
178 c = nextchar, nextchar = -1; \