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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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