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1 /*
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2 * CDDL HEADER START
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3 *
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4 * The contents of this file are subject to the terms of the
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5 * Common Development and Distribution License, Version 1.0 only
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6 * (the "License"). You may not use this file except in compliance
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7 * with the License.
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8 *
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9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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10 * or http://www.opensolaris.org/os/licensing.
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11 * See the License for the specific language governing permissions
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12 * and limitations under the License.
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13 *
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14 * When distributing Covered Code, include this CDDL HEADER in each
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15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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16 * If applicable, add the following below this CDDL HEADER, with the
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17 * fields enclosed by brackets "[]" replaced with your own identifying
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18 * information: Portions Copyright [yyyy] [name of copyright owner]
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19 *
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20 * CDDL HEADER END
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21 */
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22 /*
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23 * Copyright (c) 1997-1999 by Sun Microsystems, Inc.
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24 * All rights reserved.
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25 */
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26
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27 #pragma ident "@(#)linkage.c 1.3 05/06/08 SMI"
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28
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29
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30 #include <stdio.h>
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31 #include <unistd.h>
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32 #include <sys/types.h>
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33 #include "parser.h"
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34 #include "trace.h"
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35 #include "util.h"
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36 #include "db.h"
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37 #include "symtab.h"
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38 #include "io.h"
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39 #include "printfuncs.h"
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40 #include "errlog.h"
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41 #include "parseproto.h"
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42
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43 static void generate_interface_predeclaration(char *, ENTRY *);
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44 static void generate_linkage_function(char *, char *);
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45
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46
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47 /*
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48 * generate_linkage -- make code for the linkage part of an individual
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49 * interface. Assumes Bodyfp.
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50 */
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51 void
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52 generate_linkage(ENTRY *function)
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53 {
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54 char *library_name = db_get_current_library(),
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55 *function_name;
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56 char composite_name[MAXLINE];
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57
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58 errlog(BEGIN, "generate_linkage() {");
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59
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60 function_name = name_of(function);
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61 (void) snprintf(composite_name, sizeof (composite_name),
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62 "%s_%s", library_name, function_name);
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63
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64 /* Print the predeclaration of the interceptor. */
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65 generate_interface_predeclaration(composite_name, function);
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66 /* Collect things we'll use more than once. */
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67
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68 /* Next the struct used to pass parameters. */
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69 (void) fprintf(Bodyfp, "static abisym_t __abi_%s_%s_sym;\n",
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70 library_name, function_name);
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71
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72 /* The linkage function, */
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73 generate_linkage_function(library_name, function_name);
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74
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75 (void) fputs("\n\n", Bodyfp);
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76 errlog(END, "}");
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77 }
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78
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79
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80 /*
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81 * generate_interface_predeclaration -- make things know so the compiler
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82 * won't kak.
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83 */
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84 static void
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85 generate_interface_predeclaration(char *composite_name, ENTRY *function)
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86 {
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87 decl_t *pp;
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88 char *p = symtab_get_prototype();
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89 char buf[BUFSIZ];
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90
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91 (void) fprintf(Bodyfp, "\n/* from \"%s\", line %d */\n",
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92 symtab_get_filename(), line_of(function));
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93 (void) fprintf(Bodyfp, "static ");
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94
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95 if (p[strlen(p)-1] != ';')
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96 (void) snprintf(buf, BUFSIZ, "%s;", strnormalize(p));
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97 else
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98 (void) snprintf(buf, BUFSIZ, "%s", strnormalize(p));
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99
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100 decl_Parse(buf, &pp);
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101 decl_AddArgNames(pp);
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102 symtab_set_prototype(decl_ToString(buf, DTS_DECL, pp, composite_name));
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103 (void) fprintf(Bodyfp, "%s;\n", symtab_get_prototype());
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104 decl_Destroy(pp);
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105 }
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106
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107
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108
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109 /*
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110 * generate_linkage_function -- The linkage function itself.
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111 */
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112 static void
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113 generate_linkage_function(char *lib, char *func)
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114 {
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115 (void) fprintf(Bodyfp,
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116 "void *__abi_%s_%s(void *real, int vflag) { \n", lib, func);
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117 (void) fprintf(Bodyfp, " ABI_REAL(%s, %s) = real;\n", lib, func);
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118 (void) fprintf(Bodyfp, " ABI_VFLAG(%s, %s) = vflag;\n", lib, func);
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119 (void) fprintf(Bodyfp,
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120 " return ((void *) %s_%s);\n}\n", lib, func);
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121 }
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