1 /* Override definitions in elfos.h to be correct for IA64.
2
3 Copyright (C) 2000-2023 Free Software Foundation, Inc.
4
5 This file is part of GCC.
6
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
10 version.
11
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
20
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
25
26 #undef TARGET_INIT_LIBFUNCS
27 #define TARGET_INIT_LIBFUNCS ia64_sysv4_init_libfuncs
28
29 /* We want DWARF2 as specified by the IA64 ABI. */
30 #undef PREFERRED_DEBUGGING_TYPE
31 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
32
33 /* Various pseudo-ops for which the Intel assembler uses non-standard
34 definitions. */
35
36 #undef STRING_ASM_OP
37 #define STRING_ASM_OP "\tstringz\t"
38
39 #undef SKIP_ASM_OP
40 #define SKIP_ASM_OP "\t.skip\t"
41
42 #undef COMMON_ASM_OP
43 #define COMMON_ASM_OP "\t.common\t"
44
45 #undef ASCII_DATA_ASM_OP
46 #define ASCII_DATA_ASM_OP "\tstring\t"
47
48 /* ia64-specific options for gas
49 ??? ia64 gas doesn't accept standard svr4 assembler options? */
50 #undef ASM_SPEC
51 #define ASM_SPEC "-x %{mconstant-gp} %{mauto-pic} %(asm_extra)"
52
53 /* ??? Unfortunately, .lcomm doesn't work, because it puts things in either
54 .bss or .sbss, and we can't control the decision of which is used. When
55 I use .lcomm, I get a cryptic "Section group has no member" error from
56 the Intel simulator. So we must explicitly put variables in .bss
57 instead. This matters only if we care about the Intel assembler. */
58
59 /* This is asm_output_aligned_bss from varasm.cc without the
60 (*targetm.asm_out.globalize_label) call at the beginning. */
61
62 /* This is for final.cc, because it is used by ASM_DECLARE_OBJECT_NAME. */
63 extern int size_directive_output;
64
65 #undef ASM_OUTPUT_ALIGNED_LOCAL
66 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
67 do { \
68 if ((DECL) && sdata_symbolic_operand (XEXP (DECL_RTL (DECL), 0), Pmode)) \
69 switch_to_section (sbss_section); \
70 else \
71 switch_to_section (bss_section); \
72 ASM_OUTPUT_ALIGN (FILE, floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
73 ASM_DECLARE_OBJECT_NAME (FILE, NAME, DECL); \
74 ASM_OUTPUT_SKIP (FILE, SIZE ? SIZE : 1); \
75 } while (0)
76
77 /* The # tells the Intel assembler that this is not a register name.
78 However, we can't emit the # in a label definition, so we set a variable
79 in ASM_OUTPUT_LABEL to control whether we want the postfix here or not.
80 We append the # to the label name, but since NAME can be an expression
81 we have to scan it for a non-label character and insert the # there. */
82
83 #undef ASM_OUTPUT_LABELREF
84 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \
85 do { \
86 const char *name_ = NAME; \
87 if (*name_ == '*') \
88 name_++; \
89 else \
90 fputs (user_label_prefix, STREAM); \
91 fputs (name_, STREAM); \
92 if (!ia64_asm_output_label) \
93 fputc ('#', STREAM); \
94 } while (0)
95
96 /* Intel assembler requires both flags and type if declaring a non-predefined
97 section. */
98 #undef INIT_SECTION_ASM_OP
99 #define INIT_SECTION_ASM_OP "\t.section\t.init,\"ax\",\"progbits\""
100 #undef FINI_SECTION_ASM_OP
101 #define FINI_SECTION_ASM_OP "\t.section\t.fini,\"ax\",\"progbits\""
102
103 #define DEBUGGER_REGNO(REGNO) \
104 ia64_debugger_regno(REGNO)
105
106 #undef SIZE_TYPE
107 #define SIZE_TYPE "long unsigned int"
108
109 #undef PTRDIFF_TYPE
110 #define PTRDIFF_TYPE "long int"
111
112 #undef WCHAR_TYPE
113 #define WCHAR_TYPE "int"
114
115 #undef WCHAR_TYPE_SIZE
116 #define WCHAR_TYPE_SIZE 32
117
118 /* We redefine this to use the ia64 .proc pseudo-op. */
119
120 #undef ASM_DECLARE_FUNCTION_NAME
121 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
122 ia64_start_function(FILE,NAME,DECL)
123
124 /* We redefine this to use the ia64 .endp pseudo-op. */
125
126 #undef ASM_DECLARE_FUNCTION_SIZE
127 #define ASM_DECLARE_FUNCTION_SIZE(FILE, NAME, DECL) \
128 do { \
129 fputs ("\t.endp ", FILE); \
130 assemble_name (FILE, NAME); \
131 fputc ('\n', FILE); \
132 } while (0)
133
134 /* Override default elf definition. */
135 #undef TARGET_ASM_RELOC_RW_MASK
136 #define TARGET_ASM_RELOC_RW_MASK ia64_reloc_rw_mask
137 #undef TARGET_ASM_SELECT_RTX_SECTION
138 #define TARGET_ASM_SELECT_RTX_SECTION ia64_select_rtx_section
139
140 #define SDATA_SECTION_ASM_OP "\t.sdata"
141 #define SBSS_SECTION_ASM_OP "\t.sbss"