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Annotation of GNUtools/cc/config/i386/svr3dbx.h, revision 1.1

1.1     ! root        1: /* Definitions for Intel 386 running system V, using dbx-in-coff encapsulation.
        !             2:    Copyright (C) 1992 Free Software Foundation, Inc.
        !             3: 
        !             4: This file is part of GNU CC.
        !             5: 
        !             6: GNU CC is free software; you can redistribute it and/or modify
        !             7: it under the terms of the GNU General Public License as published by
        !             8: the Free Software Foundation; either version 2, or (at your option)
        !             9: any later version.
        !            10: 
        !            11: GNU CC is distributed in the hope that it will be useful,
        !            12: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            14: GNU General Public License for more details.
        !            15: 
        !            16: You should have received a copy of the GNU General Public License
        !            17: along with GNU CC; see the file COPYING.  If not, write to
        !            18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            19: 
        !            20: #include "i386/svr3gas.h"
        !            21: 
        !            22: /* We do not want to output SDB debugging information.  */
        !            23: 
        !            24: #undef SDB_DEBUGGING_INFO
        !            25: 
        !            26: /* We want to output DBX debugging information.  */
        !            27: 
        !            28: #define DBX_DEBUGGING_INFO
        !            29: 
        !            30: /* Compensate for botch in dbxout_init/dbxout_source_file which
        !            31:    unconditionally drops the first character from ltext_label_name */
        !            32: 
        !            33: #undef ASM_GENERATE_INTERNAL_LABEL
        !            34: #define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER) \
        !            35:     sprintf ((BUF), "*.%s%d", (PREFIX), (NUMBER))
        !            36: 
        !            37: /* With the current gas, .align N aligns to an N-byte boundary.
        !            38:    This is done to be compatible with the system assembler.
        !            39:    You have specify -DOTHER_ALIGN wenn building gas-1.38.1. */
        !            40: 
        !            41: #undef ASM_OUTPUT_ALIGN
        !            42: #define ASM_OUTPUT_ALIGN(FILE,LOG)     \
        !            43:      if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG))
        !            44: 
        !            45: /* Align labels, etc. at 4-byte boundaries.
        !            46:    For the 486, align to 16-byte boundary for sake of cache.  */
        !            47: 
        !            48: #undef ASM_OUTPUT_ALIGN_CODE
        !            49: #define ASM_OUTPUT_ALIGN_CODE(FILE)                    \
        !            50:      fprintf ((FILE), "\t.align %d,0x90\n",            \
        !            51:              TARGET_486 ? 16 : 4);  /* Use log of 16 or log of 4 as arg.  */
        !            52: 
        !            53: /* Align start of loop at 4-byte boundary.  */
        !            54: 
        !            55: #undef ASM_OUTPUT_LOOP_ALIGN
        !            56: #define ASM_OUTPUT_LOOP_ALIGN(FILE) \
        !            57:      fprintf ((FILE), "\t.align 4,0x90\n");
        !            58: 
        !            59: 
        !            60: /* Additional overrides needed for dbx-in-coff gas, mostly taken from pbb.h */
        !            61: 
        !            62: /* Although the gas we use can create .ctor and .dtor sections from N_SETT
        !            63:    stabs, it does not support section directives, so we need to have the loader
        !            64:    define the lists.
        !            65:  */
        !            66: #define CTOR_LISTS_DEFINED_EXTERNALLY
        !            67: 
        !            68: /* similar to default, but allows for the table defined by ld with svr3.ifile. 
        !            69:    nptrs is always 0.  So we need to instead check that __DTOR_LIST__[1] != 0.
        !            70:    The old check is left in so that the same macro can be used if and when  
        !            71:    a future version of gas does support section directives. */
        !            72: 
        !            73: #define DO_GLOBAL_DTORS_BODY {int nptrs = *(int *)__DTOR_LIST__; int i; \
        !            74:   if (nptrs == -1 || (__DTOR_LIST__[0] == 0 && __DTOR_LIST__[1] != 0))  \
        !            75:     for (nptrs = 0; __DTOR_LIST__[nptrs + 1] != 0; nptrs++);           \
        !            76:   for (i = nptrs; i >= 1; i--)                                         \
        !            77:     __DTOR_LIST__[i] (); }
        !            78: 
        !            79: /* Use crt1.o as a startup file and crtn.o as a closing file.  */
        !            80: /*
        !            81:  * The loader directive file svr3.ifile defines how to merge the constructor 
        !            82:  * sections into the data section.  Also, since gas only puts out those 
        !            83:  * sections in response to N_SETT stabs, and does not (yet) have a 
        !            84:  * ".sections" directive, svr3.ifile also defines the list symbols 
        !            85:  * __DTOR_LIST__ and __CTOR_LIST__.
        !            86:  */
        !            87: #undef STARTFILE_SPEC
        !            88: #define STARTFILE_SPEC \
        !            89:   "%{!r:%{!z:svr3.ifile%s}%{z:svr3z.ifile%s}}\
        !            90:    %{pg:gcrt1.o%s}%{!pg:%{posix:%{p:mcrtp1.o%s}%{!p:crtp1.o%s}}%{!posix:%{p:mcrt1.o%s}%{!p:crt1.o%s}}} \
        !            91:    %{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp}"
        !            92:   
        !            93: #define ENDFILE_SPEC "crtn.o%s"
        !            94:   
        !            95: #undef LIB_SPEC
        !            96: #define LIB_SPEC "%{posix:-lcposix} %{shlib:-lc_s} -lc -lg"

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