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1.1 root 1: /* Core target definitions for GNU compiler
2: for IBM RS/6000 PowerPC running NetWare
3: Copyright (C) 1994 Free Software Foundation, Inc.
4: Contributed by Cygnus Support.
5:
6: This file is part of GNU CC.
7:
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)
11: any later version.
12:
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.
17:
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. */
21:
22: #include "rs6000/powerpc.h"
23:
24: /* Don't generate XCOFF debugging information. */
25:
26: #undef XCOFF_DEBUGGING_INFO
27:
28: /* Don't use the COFF object file format. */
29:
30: #undef OBJECT_FORMAT_COFF
31:
32: /* The XCOFF support uses weird symbol suffixes, which we don't want
33: for ELF. */
34:
35: #undef RS6000_OUTPUT_BASENAME
36: #define RS6000_OUTPUT_BASENAME(FILE, NAME) assemble_name (FILE, NAME)
37:
38: /* Don't bother to output .extern pseudo-ops. They are not needed by
39: ELF assemblers. */
40:
41: #undef ASM_OUTPUT_EXTERNAL
42:
43: /* Undefine some things which are defined by the generic svr4.h. */
44:
45: #undef ASM_FILE_END
46: #undef ASM_OUTPUT_EXTERNAL_LIBCALL
47: #undef READONLY_DATA_SECTION
48: #undef SELECT_SECTION
49: #undef ASM_DECLARE_FUNCTION_NAME
50:
51: /* Use the regular svr4 definitions. */
52:
53: #include "svr4.h"
54: #include "netware.h"
55:
56: /* Create a function descriptor when we declare a function name. This
57: is a mixture of the ASM_DECLARE_FUNCTION_NAME macros in rs6000.h
58: and svr4.h. The unmodified function name is used to name the
59: descriptor. The function name with an initial `.' is used to name
60: the code. */
61:
62: #undef ASM_DECLARE_FUNCTION_NAME
63: #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
64: do { \
65: fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
66: assemble_name (FILE, NAME); \
67: putc (',', FILE); \
68: fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
69: putc ('\n', FILE); \
70: ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
71: if (TREE_PUBLIC (DECL)) \
72: { \
73: fprintf (FILE, "\t.globl ."); \
74: assemble_name (FILE, NAME); \
75: fprintf (FILE, "\n"); \
76: } \
77: data_section (); \
78: ASM_OUTPUT_ALIGN (FILE, 2); \
79: ASM_OUTPUT_LABEL (FILE, NAME); \
80: fprintf (FILE, "\t.long ."); \
81: assemble_name (FILE, NAME); \
82: fprintf (FILE, ", __GOT0, 0\n"); \
83: text_section (); \
84: fprintf (FILE, "."); \
85: ASM_OUTPUT_LABEL (FILE, NAME); \
86: } while (0)
87:
88: /* We need to override the .size output in order to put a `.' before
89: the function name. */
90:
91: #undef ASM_DECLARE_FUNCTION_SIZE
92: #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
93: do { \
94: if (!flag_inhibit_size_directive) \
95: { \
96: char label[256]; \
97: static int labelno; \
98: labelno++; \
99: ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
100: ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
101: fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
102: assemble_name (FILE, (FNAME)); \
103: fprintf (FILE, ","); \
104: assemble_name (FILE, label); \
105: fprintf (FILE, "-."); \
106: assemble_name (FILE, (FNAME)); \
107: putc ('\n', FILE); \
108: } \
109: } while (0)
110:
111: /* Use ELF style section commands. */
112:
113: #undef TEXT_SECTION_ASM_OP
114: #define TEXT_SECTION_ASM_OP "\t.section\t\".text\""
115:
116: #undef DATA_SECTION_ASM_OP
117: #define DATA_SECTION_ASM_OP "\t.section\t\".data\""
118:
119: /* Besides the usual ELF sections, we need a toc section. */
120:
121: #undef EXTRA_SECTIONS
122: #define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_toc
123:
124: #undef EXTRA_SECTION_FUNCTIONS
125: #define EXTRA_SECTION_FUNCTIONS \
126: CONST_SECTION_FUNCTION \
127: CTORS_SECTION_FUNCTION \
128: DTORS_SECTION_FUNCTION \
129: TOC_SECTION_FUNCTION
130:
131: #define TOC_SECTION_FUNCTION \
132: void \
133: toc_section () \
134: { \
135: if (TARGET_MINIMAL_TOC) \
136: { \
137: static int toc_initialized = 0; \
138: \
139: if (! toc_initialized) \
140: { \
141: fprintf (asm_out_file, "%s\n", TOC_SECTION_ASM_OP); \
142: fprintf (asm_out_file, ".LCTOC0:\n"); \
143: fprintf (asm_out_file, "\t.tc .LCTOC1\n"); \
144: fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP); \
145: fprintf (asm_out_file, ".LCTOC1:\n"); \
146: toc_initialized = 1; \
147: } \
148: } \
149: \
150: if (in_section != in_toc) \
151: { \
152: fprintf (asm_out_file, "%s\n", \
153: (TARGET_MINIMAL_TOC \
154: ? MINIMAL_TOC_SECTION_ASM_OP \
155: : TOC_SECTION_ASM_OP)); \
156: in_section = in_toc; \
157: } \
158: }
159:
160: #define TOC_SECTION_ASM_OP "\t.section\t.got,\"aw\""
161: #define MINIMAL_TOC_SECTION_ASM_OP "\t.section\t.got1,\"aw\""
162:
163: /* Use the TOC section for TOC entries. */
164:
165: #undef SELECT_RTX_SECTION
166: #define SELECT_RTX_SECTION(MODE, X) \
167: { if (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (X)) \
168: toc_section (); \
169: else \
170: const_section (); \
171: }
172:
173: /* How to renumber registers for dbx and gdb. */
174:
175: #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
176:
177: /* svr4.h overrides ASM_OUTPUT_INTERNAL_LABEL. */
178:
179: #undef ASM_OUTPUT_INTERNAL_LABEL_PREFIX
180: #define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX) \
181: fprintf (FILE, ".%s", PREFIX)
182:
183: /* Pass -m601 to the assembler, since that is what powerpc.h currently
184: implies. */
185: #undef ASM_SPEC
186: #define ASM_SPEC \
187: "-u -m601 %{V} %{v:%{!V:-V}} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
188: /* This is the end of what might become sysv4.h. */
189:
190: /* Enable output of DBX (stabs) debugging information when asked for it. */
191:
192: #define DBX_DEBUGGING_INFO
193:
194: /* Prefer DBX (stabs) debugging information over the native (DWARF) format. */
195:
196: #undef PREFERRED_DEBUGGING_TYPE
197: #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
198:
199: /* Line numbers are relative to the current function. */
200:
201: #undef ASM_OUTPUT_SOURCE_LINE
202: #define ASM_OUTPUT_SOURCE_LINE(file, line) \
203: { static int sym_lineno = 1; \
204: fprintf (file, ".stabn 68,0,%d,.LM%d-.%s\n.LM%d:\n",\
205: line, sym_lineno, \
206: XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0), \
207: sym_lineno); \
208: sym_lineno += 1; }
209:
210: /* But, to make this work, we have to output the stabs for the function
211: name *first*... */
212:
213: #define DBX_FUNCTION_FIRST
214:
215: /* We need to output LBRAC and RBRAC lines specially to include the
216: dot in from of the text symbol for a function. */
217:
218: #define DBX_OUTPUT_LBRAC(FILE, BUF) \
219: do \
220: { \
221: fprintf (FILE, "%s %d,0,0,", ASM_STABN_OP, N_LBRAC); \
222: assemble_name (FILE, BUF); \
223: fprintf (FILE, "-."); \
224: assemble_name (asmfile, \
225: XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
226: fprintf (asmfile, "\n"); \
227: } \
228: while (0)
229:
230: #define DBX_OUTPUT_RBRAC(FILE, BUF) \
231: do \
232: { \
233: fprintf (FILE, "%s %d,0,0,", ASM_STABN_OP, N_RBRAC); \
234: assemble_name (FILE, BUF); \
235: fprintf (FILE, "-."); \
236: assemble_name (asmfile, \
237: XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
238: fprintf (asmfile, "\n"); \
239: } \
240: while (0)
241:
242: /* We are using function descriptors, so the value of a function
243: symbol is in the .data section. However, we want the stabs entry
244: for that function to point at the actual function code in the .text
245: section, which we get by prefixing the symbol with a dot. */
246:
247: #define DBX_FINISH_SYMBOL(sym) \
248: do { \
249: int line = 0; \
250: if (use_gnu_debug_info_extensions && sym != 0) \
251: line = DECL_SOURCE_LINE (sym); \
252: \
253: fprintf (asmfile, "\",%d,0,%d,", current_sym_code, line); \
254: if (current_sym_addr) \
255: { \
256: if (TREE_CODE (sym) == FUNCTION_DECL) \
257: fprintf (asmfile, "."); \
258: output_addr_const (asmfile, current_sym_addr); \
259: } \
260: else \
261: fprintf (asmfile, "%d", current_sym_value); \
262: putc ('\n', asmfile); \
263: } while (0)
264:
265: /* This is the end of what might become sysv4dbx.h. */
266:
267: #undef TARGET_VERSION
268: #define TARGET_VERSION fprintf (stderr, " (PowerPC Netware)");
269:
270: /* FIXME: These should actually indicate PowerPC, when there is some
271: standard way of expressing that. */
272: #undef CPP_PREDEFINES
273: #define CPP_PREDEFINES \
274: "-DPPC D__netware__ -Asystem(netware) -Acpu(powerpc) -Amachine(powerpc)"
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