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Annotation of gcc/config/aix386.h, revision 1.1.1.3

1.1       root        1: /* Definitions for IBM PS2 running AIX/386.
                      2:    From: Minh Tran-Le <[email protected]>
                      3:    Copyright (C) 1988 Free Software Foundation, Inc.
                      4: 
                      5: This file is part of GNU CC.
                      6: 
                      7: GNU CC is free software; you can redistribute it and/or modify
                      8: it under the terms of the GNU General Public License as published by
                      9: the Free Software Foundation; either version 2, or (at your option)
                     10: any later version.
                     11: 
                     12: GNU CC is distributed in the hope that it will be useful,
                     13: but WITHOUT ANY WARRANTY; without even the implied warranty of
                     14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     15: GNU General Public License for more details.
                     16: 
                     17: You should have received a copy of the GNU General Public License
                     18: along with GNU CC; see the file COPYING.  If not, write to
                     19: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
                     20: 
                     21: 
                     22: #include "i386.h"
                     23: 
                     24: /* Get the generic definitions for system V.3.  */
                     25: 
                     26: #include "svr3.h"
                     27: 
                     28: /* Use the ATT assembler syntax.
                     29:    This overrides at least one macro (ASM_OUTPUT_LABELREF) from svr3.h.  */
                     30: 
                     31: #include "att386.h"
                     32: 
                     33: /* Use crt1.o as a startup file and crtn.o as a closing file.  */
                     34: 
                     35: #define STARTFILE_SPEC  \
                     36:   "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}} crtbegin.o%s"
                     37: 
                     38: #define LIB_SPEC "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} -lc \
                     39:   crtend.o%s crtn.o%s"
                     40: 
                     41: /* Special flags for the linker.  I don't know what they do.  */
                     42: 
                     43: #define LINK_SPEC "%{K} %{!K:-K} %{T*} %{z:-lm}"
                     44: 
                     45: /* Specify predefined symbols in preprocessor.  */
                     46: 
                     47: #define CPP_PREDEFINES "-D_I386 -Di386 -DAIX -D_AIX"
                     48: 
                     49: /* special flags for the aix assembler to generate the short form for all
                     50:    qualifying forward reference */
                     51: 
                     52: #define ASM_SPEC "-s2"
                     53: 
                     54: #undef ASM_FILE_START
                     55: #define ASM_FILE_START(FILE)                                   \
                     56:   do { fprintf (FILE, "\t.file\t\"%s\"\n", dump_base_name);    \
                     57:        if (optimize)                                           \
                     58:           ASM_FILE_START_1 (FILE);                             \
                     59:        else                                                    \
                     60:           fprintf (FILE, "\t.noopt\n");                                \
                     61:      } while (0)
                     62: 
                     63: /* This was suggested, but it shouldn't be right for DBX output. -- RMS
                     64:    #define ASM_OUTPUT_SOURCE_FILENAME(FILE, NAME) */
                     65: 
                     66: /* Writing `int' for a bitfield forces int alignment for the structure.  */
                     67: 
                     68: #define PCC_BITFIELD_TYPE_MATTERS 1
                     69: 
                     70: #if 0
                     71: /* Don't write a `.optim' pseudo; this assembler
                     72:    is said to have a bug when .optim is used.  */
                     73: 
                     74: #undef ASM_FILE_START_1
                     75: #define ASM_FILE_START_1(FILE) fprintf (FILE, "\t.noopt\n");
                     76: #endif
                     77: 
                     78: /* Output assembler code to FILE to increment profiler label # LABELNO
                     79:    for profiling a function entry.  */
                     80: 
                     81: #undef FUNCTION_PROFILER
                     82: #define FUNCTION_PROFILER(FILE, LABELNO)  \
                     83:    fprintf (FILE, "\tleal %sP%d,%%eax\n\tcall mcount\n", LPREFIX, (LABELNO));
                     84: 
                     85: /* Note that using bss_section here caused errors
                     86:    in building shared libraries on system V.3.
                     87:    but AIX 1.2 does not have yet shareable libraries on PS2 */
                     88: #undef ASM_OUTPUT_LOCAL
                     89: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
                     90:   (bss_section (),                                     \
                     91:    ASM_OUTPUT_LABEL ((FILE), (NAME)),                  \
                     92:    fprintf ((FILE), "\t.set .,.+%u\n", (ROUNDED)))
                     93: 
1.1.1.2   root       94: /* Define a few machine-specific details of the implementation of
                     95:    constructors.  */
1.1       root       96: 
                     97: #undef INIT_SECTION_ASM_OP
                     98: #define INIT_SECTION_ASM_OP     ".section .init,\"x\""
                     99: 
1.1.1.2   root      100: #define CTOR_LIST_BEGIN                                \
                    101:   asm (INIT_SECTION_ASM_OP);                   \
                    102:   asm ("pushl $0")
                    103: #define CTOR_LIST_END CTOR_LIST_BEGIN
1.1       root      104: 
                    105: #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME)      \
                    106:   do {                                         \
                    107:     init_section ();                           \
                    108:     fprintf (FILE, "\tpushl $");               \
                    109:     assemble_name (FILE, NAME);                        \
                    110:     fprintf (FILE, "\n");                      \
                    111:   } while (0)

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