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annotate perl-5.22.2/os2/dl_os2.c @ 8045:a16537d2fe07

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<xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
author HackBot
date Sat, 14 May 2016 14:54:38 +0000
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rev   line source
8045
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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1 #include "dlfcn.h"
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2 #include "string.h"
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3 #include "stdio.h"
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4
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5 #define INCL_BASE
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6 #include <os2.h>
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7 #include <float.h>
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8 #include <stdlib.h>
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9
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10 static ULONG retcode;
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11 static char fail[300];
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12
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13 static ULONG dllHandle;
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14 static int handle_found;
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15 static int handle_loaded;
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16 #ifdef PERL_CORE
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17
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18 #include "EXTERN.h"
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19 #include "perl.h"
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20
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21 #else
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22
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23 char *os2error(int rc);
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24
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25 #endif
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26
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27 #ifdef DLOPEN_INITTERM
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28 unsigned long _DLL_InitTerm(unsigned long modHandle, unsigned long flag)
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29 {
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30 switch (flag) {
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31 case 0: /* INIT */
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32 /* Save handle */
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33 dllHandle = modHandle;
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34 handle_found = 1;
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35 return TRUE;
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36
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37 case 1: /* TERM */
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38 handle_found = 0;
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39 dllHandle = (unsigned long)NULLHANDLE;
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40 return TRUE;
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41 }
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42
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43 return FALSE;
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44 }
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45
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46 #endif
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47
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48 HMODULE
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49 find_myself(void)
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50 {
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51
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52 static APIRET APIENTRY (*pDosQueryModFromEIP) (HMODULE * hmod, ULONG * obj, ULONG BufLen, PCHAR Buf,
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53 ULONG * Offset, ULONG Address);
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54 HMODULE doscalls_h, mod;
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55 static int failed;
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56 ULONG obj, offset, rc;
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57 char buf[260];
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58
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59 if (failed)
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60 return 0;
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61 failed = 1;
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62 doscalls_h = (HMODULE)dlopen("DOSCALLS",0);
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63 if (!doscalls_h)
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64 return 0;
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65 /* {&doscalls_handle, NULL, 360}, */ /* DosQueryModFromEIP */
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66 rc = DosQueryProcAddr(doscalls_h, 360, 0, (PFN*)&pDosQueryModFromEIP);
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67 if (rc)
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68 return 0;
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69 rc = pDosQueryModFromEIP(&mod, &obj, sizeof(buf), buf, &offset, (ULONG)dlopen);
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70 if (rc)
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71 return 0;
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72 failed = 0;
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73 handle_found = 1;
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74 dllHandle = mod;
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75 return mod;
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76 }
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77
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78 void *
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79 dlopen(const char *path, int mode)
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80 {
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81 HMODULE handle;
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82 char tmp[260];
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83 const char *beg, *dot;
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84 ULONG rc;
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85 unsigned fpflag = _control87(0,0);
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86
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87 fail[0] = 0;
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88 if (!path) { /* Our own handle. */
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89 if (handle_found || find_myself()) {
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90 char dllname[260];
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91
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92 if (handle_loaded)
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93 return (void*)dllHandle;
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94 rc = DosQueryModuleName(dllHandle, sizeof(dllname), dllname);
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95 if (rc) {
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96 strcpy(fail, "can't find my DLL name by the handle");
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97 retcode = rc;
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98 return 0;
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99 }
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100 rc = DosLoadModule(fail, sizeof fail, dllname, &handle);
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101 if (rc) {
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102 strcpy(fail, "can't load my own DLL");
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103 retcode = rc;
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104 return 0;
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105 }
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106 handle_loaded = 1;
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107 goto ret;
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108 }
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109 retcode = ERROR_MOD_NOT_FOUND;
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110 strcpy(fail, "can't load from myself: compiled without -DDLOPEN_INITTERM");
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111 return 0;
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112 }
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113 if ((rc = DosLoadModule(fail, sizeof fail, (char*)path, &handle)) == 0)
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114 goto ret;
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115
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116 retcode = rc;
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117
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118 if (strlen(path) >= sizeof(tmp))
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119 return NULL;
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120
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121 /* Not found. Check for non-FAT name and try truncated name. */
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122 /* Don't know if this helps though... */
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123 for (beg = dot = path + strlen(path);
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124 beg > path && !strchr(":/\\", *(beg-1));
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125 beg--)
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126 if (*beg == '.')
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127 dot = beg;
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128 if (dot - beg > 8) {
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129 int n = beg+8-path;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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130
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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131 memmove(tmp, path, n);
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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132 memmove(tmp+n, dot, strlen(dot)+1);
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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133 if (DosLoadModule(fail, sizeof fail, tmp, &handle) == 0)
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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134 goto ret;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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135 }
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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136 handle = 0;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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137
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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138 ret:
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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139 _control87(fpflag, MCW_EM); /* Some modules reset FP flags on load */
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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140 return (void *)handle;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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141 }
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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142
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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143 #define ERROR_WRONG_PROCTYPE 0xffffffff
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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144
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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145 void *
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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146 dlsym(void *handle, const char *symbol)
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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147 {
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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148 ULONG rc, type;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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149 PFN addr;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
150
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
151 fail[0] = 0;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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152 rc = DosQueryProcAddr((HMODULE)handle, 0, symbol, &addr);
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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153 if (rc == 0) {
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
154 rc = DosQueryProcType((HMODULE)handle, 0, symbol, &type);
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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155 if (rc == 0 && type == PT_32BIT)
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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156 return (void *)addr;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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157 rc = ERROR_WRONG_PROCTYPE;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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158 }
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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159 retcode = rc;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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160 return NULL;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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161 }
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
162
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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163 char *
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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164 dlerror(void)
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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165 {
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
166 static char buf[700];
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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167 ULONG len;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
168 char *err;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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169
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
170 if (retcode == 0)
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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171 return NULL;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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172 if (retcode == ERROR_WRONG_PROCTYPE)
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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173 err = "Wrong procedure type";
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
174 else
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
175 err = os2error(retcode);
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
176 len = strlen(err);
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
177 if (len > sizeof(buf) - 1)
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
178 len = sizeof(buf) - 1;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
179 strncpy(buf, err, len+1);
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
180 if (fail[0] && len + strlen(fail) < sizeof(buf) - 100)
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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181 sprintf(buf + len, ", possible problematic module: '%s'", fail);
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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182 retcode = 0;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
183 return buf;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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184 }
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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185
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
186 int
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
187 dlclose(void *handle)
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
188 {
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
189 ULONG rc;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
190
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
191 if ((rc = DosFreeModule((HMODULE)handle)) == 0) return 0;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
192
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
193 retcode = rc;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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diff changeset
194 return 2;
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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195 }