[35aab3] | 1 | /**************************************** |
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| 2 | * Computer Algebra System SINGULAR * |
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| 3 | ****************************************/ |
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[341696] | 4 | /* $Id$ */ |
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[35aab3] | 5 | /* |
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| 6 | * ABSTRACT: machine depend code for dynamic modules |
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| 7 | * |
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| 8 | * Provides: dynl_open() |
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| 9 | * dynl_sym() |
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| 10 | * dynl_error() |
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[4c7d73] | 11 | * dynl_close() |
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[35aab3] | 12 | */ |
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| 13 | |
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| 14 | #include <stdio.h> |
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[9ed245] | 15 | #include <string.h> |
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| 16 | #include <ctype.h> |
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| 17 | #include <sys/stat.h> |
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| 18 | |
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[35aab3] | 19 | |
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[8c9912] | 20 | #include "config.h" |
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| 21 | #include <misc/auxiliary.h> |
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[35aab3] | 22 | |
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[f9dc520] | 23 | #include <omalloc/omalloc.h> |
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[8c9912] | 24 | |
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| 25 | #include <reporter/reporter.h> |
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| 26 | |
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| 27 | #include <resources/feResource.h> |
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| 28 | #include <resources/feFopen.h> |
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| 29 | |
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[fad7c58] | 30 | #include "mod_raw.h" |
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[35aab3] | 31 | |
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[abaf13] | 32 | #ifdef HAVE_STATIC |
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| 33 | #undef HAVE_DL |
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| 34 | #endif |
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[9ed245] | 35 | /*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/ |
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| 36 | #define BYTES_TO_CHECK 7 |
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| 37 | |
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| 38 | lib_types type_of_LIB(char *newlib, char *libnamebuf) |
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| 39 | { |
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[7dce2d7] | 40 | const unsigned char mach_o[]={0xfe,0xed,0xfa,0xce,0}; |
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[05b917] | 41 | const unsigned char mach_O[]={0xce,0xfa,0xed,0xfe,0}; |
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[9ed245] | 42 | char buf[BYTES_TO_CHECK+1]; /* one extra for terminating '\0' */ |
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| 43 | struct stat sb; |
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| 44 | int nbytes = 0; |
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| 45 | int ret; |
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| 46 | lib_types LT=LT_NONE; |
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| 47 | |
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| 48 | FILE * fp = feFopen( newlib, "r", libnamebuf, FALSE ); |
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| 49 | ret = stat(libnamebuf, &sb); |
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| 50 | |
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| 51 | if (fp==NULL) |
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| 52 | { |
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| 53 | return LT_NOTFOUND; |
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| 54 | } |
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| 55 | if((sb.st_mode & S_IFMT) != S_IFREG) |
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| 56 | { |
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| 57 | goto lib_type_end; |
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| 58 | } |
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| 59 | if ((nbytes = fread((char *)buf, sizeof(char), BYTES_TO_CHECK, fp)) == -1) |
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| 60 | { |
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| 61 | goto lib_type_end; |
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| 62 | /*NOTREACHED*/ |
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| 63 | } |
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| 64 | if (nbytes == 0) |
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| 65 | goto lib_type_end; |
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| 66 | else |
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| 67 | { |
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| 68 | buf[nbytes++] = '\0'; /* null-terminate it */ |
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| 69 | } |
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| 70 | if( (strncmp(buf, "\177ELF", 4)==0)) /* generic ELF */ |
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| 71 | { |
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| 72 | LT = LT_ELF; |
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| 73 | //omFree(newlib); |
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| 74 | //newlib = omStrDup(libnamebuf); |
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| 75 | goto lib_type_end; |
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| 76 | } |
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[1ea9a7] | 77 | |
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[05b917] | 78 | if( (strncmp(buf, (const char *)mach_o, 4)==0) || (strncmp(buf, (const char *)mach_O, 4)==0)) /* generic Mach-O module */ |
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[1ea9a7] | 79 | { |
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| 80 | LT = LT_MACH_O; |
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| 81 | //omFree(newlib); |
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| 82 | //newlib = omStrDup(libnamebuf); |
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| 83 | goto lib_type_end; |
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| 84 | } |
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[27fc50] | 85 | |
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| 86 | if( (strncmp(buf, &mach_o_module[0], 4)==0)) /* Mach-O bundle */ |
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| 87 | { |
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| 88 | LT = LT_MACH_O; |
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| 89 | //omFree(newlib); |
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| 90 | //newlib = omStrDup(libnamebuf); |
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| 91 | goto lib_type_end; |
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| 92 | } |
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| 93 | |
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| 94 | |
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[9ed245] | 95 | if( (strncmp(buf, "\02\020\01\016\05\022@", 7)==0)) |
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| 96 | { |
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| 97 | LT = LT_HPUX; |
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| 98 | //omFree(newlib); |
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| 99 | //newlib = omStrDup(libnamebuf); |
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| 100 | goto lib_type_end; |
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| 101 | } |
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| 102 | if(isprint(buf[0]) || buf[0]=='\n') |
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| 103 | { LT = LT_SINGULAR; goto lib_type_end; } |
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| 104 | |
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| 105 | lib_type_end: |
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| 106 | fclose(fp); |
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| 107 | return LT; |
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| 108 | } |
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| 109 | /*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/ |
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| 110 | #if defined(HAVE_DL) |
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| 111 | |
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[35aab3] | 112 | /***************************************************************************** |
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| 113 | * |
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| 114 | * General section |
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[abaf13] | 115 | * These are just wrappers around the repsective dynl_* calls |
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[35aab3] | 116 | * which look for the binary in the bin_dir of Singular and ommit warnings if |
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| 117 | * somethings goes wrong |
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| 118 | * |
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| 119 | *****************************************************************************/ |
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| 120 | static BOOLEAN warn_handle = FALSE; |
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| 121 | static BOOLEAN warn_proc = FALSE; |
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| 122 | #ifndef DL_TAIL |
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| 123 | #define DL_TAIL "so" |
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| 124 | #endif |
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| 125 | |
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[9ef9d0] | 126 | void* dynl_open_binary_warn(const char* binary_name, const char* msg) |
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[35aab3] | 127 | { |
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| 128 | void* handle = NULL; |
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| 129 | const char* bin_dir = feGetResource('b'); |
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| 130 | if (bin_dir != NULL) |
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| 131 | { |
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[f9dc520] | 132 | const int binary_name_so_length = 3 + strlen(DL_TAIL) + strlen(binary_name) + strlen(DIR_SEPP) + strlen(bin_dir); |
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| 133 | char* binary_name_so = (char *)omAlloc0( binary_name_so_length * sizeof(char) ); |
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| 134 | snprintf(binary_name_so, binary_name_so_length, "%s%s%s.%s", bin_dir, DIR_SEPP, binary_name, DL_TAIL); |
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| 135 | handle = dynl_open(binary_name_so); |
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| 136 | omFreeSize((ADDRESS)binary_name_so, binary_name_so_length * sizeof(char) ); |
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| 137 | } |
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| 138 | |
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| 139 | if (handle == NULL ) |
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| 140 | { |
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| 141 | const int binary_name_so_length = 3 + strlen(DL_TAIL) + strlen(binary_name); |
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| 142 | char* binary_name_so = (char *)omAlloc0( binary_name_so_length * sizeof(char) ); |
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| 143 | snprintf(binary_name_so, binary_name_so_length, "%s.%s", binary_name, DL_TAIL); |
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| 144 | |
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| 145 | char* pp = (char *)omAlloc0( MAXPATHLEN * sizeof(char) ); |
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| 146 | lib_types type = type_of_LIB( binary_name_so, pp ); |
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| 147 | omFreeSize((ADDRESS)binary_name_so, binary_name_so_length * sizeof(char) ); |
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| 148 | |
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[05b917] | 149 | if( type != LT_SINGULAR && type != LT_NONE && type != LT_NOTFOUND ) |
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[f9dc520] | 150 | handle = dynl_open(pp); |
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| 151 | |
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| 152 | omFreeSize((ADDRESS)pp, MAXPATHLEN * sizeof(char) ); |
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| 153 | } |
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| 154 | |
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| 155 | if (handle == NULL && ! warn_handle) |
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| 156 | { |
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| 157 | Warn("Could not find dynamic library: %s.%s", binary_name, DL_TAIL); |
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[35aab3] | 158 | Warn("Error message from system: %s", dynl_error()); |
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| 159 | if (msg != NULL) Warn("%s", msg); |
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| 160 | Warn("See the INSTALL section in the Singular manual for details."); |
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| 161 | warn_handle = TRUE; |
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| 162 | } |
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[f9dc520] | 163 | |
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[35aab3] | 164 | return handle; |
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| 165 | } |
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| 166 | |
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[85e68dd] | 167 | void* dynl_sym_warn(void* handle, const char* proc, const char* msg) |
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[35aab3] | 168 | { |
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| 169 | void *proc_ptr = NULL; |
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| 170 | if (handle != NULL) |
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| 171 | { |
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| 172 | proc_ptr = dynl_sym(handle, proc); |
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| 173 | if (proc_ptr == NULL && ! warn_proc) |
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| 174 | { |
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| 175 | Warn("Could load a procedure from a dynamic library"); |
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| 176 | Warn("Error message from system: %s", dynl_error()); |
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| 177 | if (msg != NULL) Warn("%s", msg); |
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| 178 | Warn("See the INSTALL section in the Singular manual for details."); |
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| 179 | warn_proc = TRUE; |
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| 180 | } |
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| 181 | } |
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| 182 | return proc_ptr; |
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| 183 | } |
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| 184 | |
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| 185 | #ifdef __cplusplus |
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| 186 | extern "C" { |
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| 187 | #endif |
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| 188 | |
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| 189 | /***************************************************************************** |
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[fc300f] | 190 | * SECTION generic ELF: ix86-linux / alpha-linux / IA64-linux /x86_64_Linux * |
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[4287a0] | 191 | * SunOS-5 / IRIX-6 / ppcMac-Darwin / FreeeBSD * |
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[35aab3] | 192 | *****************************************************************************/ |
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[f02645b] | 193 | // relying on gcc to define __ELF__, check with cpp -dM /dev/null |
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[9b3de5] | 194 | // Mac OsX is an ELF system, but does not define __ELF__ |
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[c3ab214] | 195 | // Solaris is an ELF system, but does not define __ELF__ |
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[d44ced] | 196 | #if defined(__ELF__) |
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[fde597] | 197 | #define HAVE_ELF_SYSTEM |
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[9b3de5] | 198 | #endif |
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| 199 | |
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[0fd6d8] | 200 | #if defined(ppcMac_darwin) |
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| 201 | #define HAVE_ELF_SYSTEM |
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| 202 | #endif |
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| 203 | |
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[d142260] | 204 | #if defined(__APPLE__) && defined(__MACH__) |
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| 205 | #define HAVE_ELF_SYSTEM |
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| 206 | #endif |
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[01d9463] | 207 | |
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[c3ab214] | 208 | #if defined(SunOS_5) |
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| 209 | #define HAVE_ELF_SYSTEM |
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[fde597] | 210 | #endif |
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| 211 | |
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[35aab3] | 212 | #if defined(HAVE_ELF_SYSTEM) |
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| 213 | #include <dlfcn.h> |
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[3dbe0bf] | 214 | #define DL_IMPLEMENTED |
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[35aab3] | 215 | |
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| 216 | static void* kernel_handle = NULL; |
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| 217 | void *dynl_open( |
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| 218 | char *filename /* I: filename to load */ |
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| 219 | ) |
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| 220 | { |
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[a513d10] | 221 | // glibc 2.2: |
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[a11e71] | 222 | if ((filename==NULL) || (dlopen(filename,RTLD_NOW|RTLD_NOLOAD)==NULL)) |
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[a513d10] | 223 | return(dlopen(filename, RTLD_NOW|RTLD_GLOBAL)); |
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| 224 | else |
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| 225 | Werror("module %s already loaded",filename); |
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| 226 | return NULL; |
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[3dbe0bf] | 227 | // alternative |
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[a513d10] | 228 | // return(dlopen(filename, RTLD_NOW|RTLD_GLOBAL)); |
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[35aab3] | 229 | } |
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| 230 | |
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[85e68dd] | 231 | void *dynl_sym(void *handle, const char *symbol) |
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[35aab3] | 232 | { |
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| 233 | if (handle == DYNL_KERNEL_HANDLE) |
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| 234 | { |
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| 235 | if (kernel_handle == NULL) |
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| 236 | kernel_handle = dynl_open(NULL); |
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| 237 | handle = kernel_handle; |
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| 238 | } |
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| 239 | return(dlsym(handle, symbol)); |
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| 240 | } |
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| 241 | |
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| 242 | int dynl_close (void *handle) |
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| 243 | { |
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| 244 | return(dlclose (handle)); |
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| 245 | } |
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| 246 | |
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| 247 | const char *dynl_error() |
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| 248 | { |
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| 249 | return(dlerror()); |
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| 250 | } |
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[fc300f] | 251 | #endif /* ELF_SYSTEM */ |
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[35aab3] | 252 | |
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| 253 | /***************************************************************************** |
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| 254 | * SECTION HPUX-9/10 * |
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| 255 | *****************************************************************************/ |
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| 256 | #if defined(HPUX_9) || defined(HPUX_10) |
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[3dbe0bf] | 257 | #define DL_IMPLEMENTED |
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[35aab3] | 258 | #include <dl.h> |
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| 259 | |
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| 260 | typedef char *((*func_ptr) ()); |
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| 261 | |
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| 262 | void *dynl_open(char *filename) |
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| 263 | { |
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| 264 | shl_t handle = shl_load(filename, BIND_DEFERRED, 0); |
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| 265 | |
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| 266 | return ((void *) handle); |
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| 267 | } |
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| 268 | |
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[85e68dd] | 269 | void *dynl_sym(void *handle, const char *symbol) |
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[35aab3] | 270 | { |
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| 271 | func_ptr f; |
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[abaf13] | 272 | |
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[35aab3] | 273 | if (handle == DYNL_KERNEL_HANDLE) |
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| 274 | handle = PROG_HANDLE; |
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[abaf13] | 275 | |
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[35aab3] | 276 | if (shl_findsym((shl_t *) & handle, symbol, TYPE_PROCEDURE, &f) == -1) |
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| 277 | { |
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| 278 | if (shl_findsym((shl_t *) & handle, symbol, TYPE_UNDEFINED, &f) == -1) |
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| 279 | { |
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| 280 | f = (func_ptr) NULL; |
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| 281 | } |
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| 282 | } |
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| 283 | return ((void *)f); |
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| 284 | } |
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| 285 | |
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| 286 | int dynl_close (void *handle) |
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| 287 | { |
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| 288 | shl_unload((shl_t) handle); |
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| 289 | return(0); |
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| 290 | } |
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| 291 | |
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| 292 | const char *dynl_error() |
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| 293 | { |
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| 294 | static char errmsg[] = "shl_load failed"; |
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| 295 | |
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| 296 | return errmsg; |
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| 297 | } |
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| 298 | #endif /* HPUX_9 or HPUX_10 */ |
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| 299 | |
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| 300 | /***************************************************************************** |
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[fc300f] | 301 | * SECTION generic: dynamic madules not available |
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[35aab3] | 302 | *****************************************************************************/ |
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[3dbe0bf] | 303 | #ifndef DL_IMPLEMENTED |
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[35aab3] | 304 | |
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| 305 | void *dynl_open(char *filename) |
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| 306 | { |
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| 307 | return(NULL); |
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| 308 | } |
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| 309 | |
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[85e68dd] | 310 | void *dynl_sym(void *handle, const char *symbol) |
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[35aab3] | 311 | { |
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| 312 | return(NULL); |
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| 313 | } |
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| 314 | |
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| 315 | int dynl_close (void *handle) |
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| 316 | { |
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| 317 | return(0); |
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| 318 | } |
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| 319 | |
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| 320 | const char *dynl_error() |
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| 321 | { |
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| 322 | static char errmsg[] = "support for dynamic loading not implemented"; |
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| 323 | return errmsg; |
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| 324 | } |
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[fc300f] | 325 | #endif |
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[35aab3] | 326 | |
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| 327 | #ifdef __cplusplus |
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| 328 | } |
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| 329 | #endif |
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| 330 | |
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| 331 | #endif /* HAVE_DL */ |
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