[35aab3] | 1 | /**************************************** |
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| 2 | * Computer Algebra System SINGULAR * |
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| 3 | ****************************************/ |
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| 4 | /* |
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| 5 | * ABSTRACT: machine depend code for dynamic modules |
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| 6 | * |
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[f4399e] | 7 | * Provides: dynl_check_opened() |
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| 8 | * dynl_open() |
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[35aab3] | 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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[f323dd1] | 27 | #include <findexec/feResource.h> |
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[8c9912] | 28 | |
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[fad7c58] | 29 | #include "mod_raw.h" |
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[35aab3] | 30 | |
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[abaf13] | 31 | #ifdef HAVE_STATIC |
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| 32 | #undef HAVE_DL |
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| 33 | #endif |
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[9ed245] | 34 | /*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/ |
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| 35 | #define BYTES_TO_CHECK 7 |
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| 36 | |
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[57dcd6] | 37 | #define SI_BUILTIN_LIBSTR(name) (char*) #name ".so", |
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| 38 | |
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| 39 | char* si_bultin_libs[]={ SI_FOREACH_BUILTIN(SI_BUILTIN_LIBSTR) NULL }; |
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| 40 | |
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| 41 | #undef SI_BUILTIN_LIBSTR |
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[801d2b] | 42 | |
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[9ed245] | 43 | lib_types type_of_LIB(char *newlib, char *libnamebuf) |
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| 44 | { |
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[7dce2d7] | 45 | const unsigned char mach_o[]={0xfe,0xed,0xfa,0xce,0}; |
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[05b917] | 46 | const unsigned char mach_O[]={0xce,0xfa,0xed,0xfe,0}; |
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[6e81fc] | 47 | |
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| 48 | const unsigned char mach_o64[]={0xfe,0xed,0xfa,0xcf,0}; |
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| 49 | const unsigned char mach_O64[]={0xcf,0xfa,0xed,0xfe,0}; |
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| 50 | |
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[801d2b] | 51 | int i=0; |
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| 52 | while(si_bultin_libs[i]!=NULL) |
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| 53 | { |
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| 54 | if (strcmp(newlib,si_bultin_libs[i])==0) |
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| 55 | { |
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| 56 | if(libnamebuf!=NULL) strcpy(libnamebuf,newlib); |
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| 57 | return LT_BUILTIN; |
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| 58 | } |
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| 59 | i++; |
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| 60 | } |
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[9ed245] | 61 | char buf[BYTES_TO_CHECK+1]; /* one extra for terminating '\0' */ |
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| 62 | struct stat sb; |
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| 63 | int nbytes = 0; |
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| 64 | int ret; |
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| 65 | lib_types LT=LT_NONE; |
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| 66 | |
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| 67 | FILE * fp = feFopen( newlib, "r", libnamebuf, FALSE ); |
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| 68 | ret = stat(libnamebuf, &sb); |
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| 69 | |
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| 70 | if (fp==NULL) |
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| 71 | { |
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| 72 | return LT_NOTFOUND; |
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| 73 | } |
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| 74 | if((sb.st_mode & S_IFMT) != S_IFREG) |
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| 75 | { |
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| 76 | goto lib_type_end; |
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| 77 | } |
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| 78 | if ((nbytes = fread((char *)buf, sizeof(char), BYTES_TO_CHECK, fp)) == -1) |
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| 79 | { |
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| 80 | goto lib_type_end; |
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| 81 | /*NOTREACHED*/ |
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| 82 | } |
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| 83 | if (nbytes == 0) |
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| 84 | goto lib_type_end; |
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| 85 | else |
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| 86 | { |
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| 87 | buf[nbytes++] = '\0'; /* null-terminate it */ |
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| 88 | } |
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| 89 | if( (strncmp(buf, "\177ELF", 4)==0)) /* generic ELF */ |
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| 90 | { |
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| 91 | LT = LT_ELF; |
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| 92 | //omFree(newlib); |
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| 93 | //newlib = omStrDup(libnamebuf); |
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| 94 | goto lib_type_end; |
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| 95 | } |
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[1ea9a7] | 96 | |
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[05b917] | 97 | 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] | 98 | { |
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| 99 | LT = LT_MACH_O; |
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| 100 | //omFree(newlib); |
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| 101 | //newlib = omStrDup(libnamebuf); |
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| 102 | goto lib_type_end; |
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| 103 | } |
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[27fc50] | 104 | |
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[6e81fc] | 105 | if( (strncmp(buf, (const char *)mach_o64, 4)==0) || (strncmp(buf, (const char *)mach_O64, 4)==0)) /* generic Mach-O 64-bit module */ |
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[27fc50] | 106 | { |
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| 107 | LT = LT_MACH_O; |
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| 108 | //omFree(newlib); |
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| 109 | //newlib = omStrDup(libnamebuf); |
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| 110 | goto lib_type_end; |
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| 111 | } |
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[801d2b] | 112 | |
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| 113 | |
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[9ed245] | 114 | if( (strncmp(buf, "\02\020\01\016\05\022@", 7)==0)) |
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| 115 | { |
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| 116 | LT = LT_HPUX; |
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| 117 | //omFree(newlib); |
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| 118 | //newlib = omStrDup(libnamebuf); |
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| 119 | goto lib_type_end; |
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| 120 | } |
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| 121 | if(isprint(buf[0]) || buf[0]=='\n') |
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| 122 | { LT = LT_SINGULAR; goto lib_type_end; } |
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| 123 | |
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| 124 | lib_type_end: |
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| 125 | fclose(fp); |
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| 126 | return LT; |
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| 127 | } |
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| 128 | /*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/ |
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| 129 | #if defined(HAVE_DL) |
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| 130 | |
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[35aab3] | 131 | /***************************************************************************** |
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| 132 | * |
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| 133 | * General section |
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[abaf13] | 134 | * These are just wrappers around the repsective dynl_* calls |
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[35aab3] | 135 | * which look for the binary in the bin_dir of Singular and ommit warnings if |
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| 136 | * somethings goes wrong |
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| 137 | * |
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| 138 | *****************************************************************************/ |
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| 139 | static BOOLEAN warn_handle = FALSE; |
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| 140 | static BOOLEAN warn_proc = FALSE; |
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| 141 | #ifndef DL_TAIL |
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[e71b67] | 142 | #ifdef NDEBUG |
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| 143 | #define DL_TAIL ".so" |
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| 144 | #else |
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| 145 | #define DL_TAIL "_g.so" |
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| 146 | #endif |
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[35aab3] | 147 | #endif |
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| 148 | |
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[9ef9d0] | 149 | void* dynl_open_binary_warn(const char* binary_name, const char* msg) |
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[35aab3] | 150 | { |
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| 151 | void* handle = NULL; |
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| 152 | const char* bin_dir = feGetResource('b'); |
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| 153 | if (bin_dir != NULL) |
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| 154 | { |
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[f9dc520] | 155 | const int binary_name_so_length = 3 + strlen(DL_TAIL) + strlen(binary_name) + strlen(DIR_SEPP) + strlen(bin_dir); |
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| 156 | char* binary_name_so = (char *)omAlloc0( binary_name_so_length * sizeof(char) ); |
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[e71b67] | 157 | snprintf(binary_name_so, binary_name_so_length, "%s%s%s%s", bin_dir, DIR_SEPP, binary_name, DL_TAIL); |
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[f9dc520] | 158 | handle = dynl_open(binary_name_so); |
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| 159 | omFreeSize((ADDRESS)binary_name_so, binary_name_so_length * sizeof(char) ); |
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| 160 | } |
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| 161 | |
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| 162 | if (handle == NULL ) |
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| 163 | { |
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| 164 | const int binary_name_so_length = 3 + strlen(DL_TAIL) + strlen(binary_name); |
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| 165 | char* binary_name_so = (char *)omAlloc0( binary_name_so_length * sizeof(char) ); |
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[e71b67] | 166 | snprintf(binary_name_so, binary_name_so_length, "%s%s", binary_name, DL_TAIL); |
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[f9dc520] | 167 | |
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| 168 | char* pp = (char *)omAlloc0( MAXPATHLEN * sizeof(char) ); |
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| 169 | lib_types type = type_of_LIB( binary_name_so, pp ); |
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| 170 | omFreeSize((ADDRESS)binary_name_so, binary_name_so_length * sizeof(char) ); |
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| 171 | |
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[05b917] | 172 | if( type != LT_SINGULAR && type != LT_NONE && type != LT_NOTFOUND ) |
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[f9dc520] | 173 | handle = dynl_open(pp); |
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| 174 | |
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| 175 | omFreeSize((ADDRESS)pp, MAXPATHLEN * sizeof(char) ); |
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| 176 | } |
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| 177 | |
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| 178 | if (handle == NULL && ! warn_handle) |
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| 179 | { |
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[e71b67] | 180 | Warn("Could not find dynamic library: %s%s", binary_name, DL_TAIL); |
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[35aab3] | 181 | Warn("Error message from system: %s", dynl_error()); |
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| 182 | if (msg != NULL) Warn("%s", msg); |
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| 183 | Warn("See the INSTALL section in the Singular manual for details."); |
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| 184 | warn_handle = TRUE; |
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| 185 | } |
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[f9dc520] | 186 | |
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[35aab3] | 187 | return handle; |
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| 188 | } |
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| 189 | |
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[85e68dd] | 190 | void* dynl_sym_warn(void* handle, const char* proc, const char* msg) |
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[35aab3] | 191 | { |
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| 192 | void *proc_ptr = NULL; |
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| 193 | if (handle != NULL) |
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| 194 | { |
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| 195 | proc_ptr = dynl_sym(handle, proc); |
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| 196 | if (proc_ptr == NULL && ! warn_proc) |
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| 197 | { |
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| 198 | Warn("Could load a procedure from a dynamic library"); |
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| 199 | Warn("Error message from system: %s", dynl_error()); |
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| 200 | if (msg != NULL) Warn("%s", msg); |
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| 201 | Warn("See the INSTALL section in the Singular manual for details."); |
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| 202 | warn_proc = TRUE; |
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| 203 | } |
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| 204 | } |
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| 205 | return proc_ptr; |
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| 206 | } |
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| 207 | |
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| 208 | #ifdef __cplusplus |
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| 209 | extern "C" { |
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| 210 | #endif |
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| 211 | |
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| 212 | /***************************************************************************** |
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[fc300f] | 213 | * SECTION generic ELF: ix86-linux / alpha-linux / IA64-linux /x86_64_Linux * |
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[4287a0] | 214 | * SunOS-5 / IRIX-6 / ppcMac-Darwin / FreeeBSD * |
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[35aab3] | 215 | *****************************************************************************/ |
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[f02645b] | 216 | // relying on gcc to define __ELF__, check with cpp -dM /dev/null |
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[9b3de5] | 217 | // Mac OsX is an ELF system, but does not define __ELF__ |
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[c3ab214] | 218 | // Solaris is an ELF system, but does not define __ELF__ |
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[d44ced] | 219 | #if defined(__ELF__) |
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[fde597] | 220 | #define HAVE_ELF_SYSTEM |
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[9b3de5] | 221 | #endif |
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| 222 | |
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[0fd6d8] | 223 | #if defined(ppcMac_darwin) |
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| 224 | #define HAVE_ELF_SYSTEM |
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| 225 | #endif |
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| 226 | |
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[801d2b] | 227 | #if defined(ix86Mac_darwin) |
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| 228 | #define HAVE_ELF_SYSTEM |
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| 229 | #endif |
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| 230 | |
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| 231 | #if defined(x86_64Mac_darwin) |
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[d142260] | 232 | #define HAVE_ELF_SYSTEM |
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| 233 | #endif |
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[01d9463] | 234 | |
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[c3ab214] | 235 | #if defined(SunOS_5) |
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| 236 | #define HAVE_ELF_SYSTEM |
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[fde597] | 237 | #endif |
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| 238 | |
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[35aab3] | 239 | #if defined(HAVE_ELF_SYSTEM) |
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| 240 | #include <dlfcn.h> |
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[3dbe0bf] | 241 | #define DL_IMPLEMENTED |
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[35aab3] | 242 | |
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| 243 | static void* kernel_handle = NULL; |
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[f4399e] | 244 | int dynl_check_opened( |
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| 245 | char *filename /* I: filename to check */ |
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| 246 | ) |
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| 247 | { |
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| 248 | return dlopen(filename,RTLD_NOW|RTLD_NOLOAD) != NULL; |
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| 249 | } |
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| 250 | |
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[35aab3] | 251 | void *dynl_open( |
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| 252 | char *filename /* I: filename to load */ |
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| 253 | ) |
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| 254 | { |
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[a513d10] | 255 | // glibc 2.2: |
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[a11e71] | 256 | if ((filename==NULL) || (dlopen(filename,RTLD_NOW|RTLD_NOLOAD)==NULL)) |
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[a513d10] | 257 | return(dlopen(filename, RTLD_NOW|RTLD_GLOBAL)); |
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| 258 | else |
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| 259 | Werror("module %s already loaded",filename); |
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| 260 | return NULL; |
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[3dbe0bf] | 261 | // alternative |
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[a513d10] | 262 | // return(dlopen(filename, RTLD_NOW|RTLD_GLOBAL)); |
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[35aab3] | 263 | } |
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| 264 | |
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[85e68dd] | 265 | void *dynl_sym(void *handle, const char *symbol) |
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[35aab3] | 266 | { |
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| 267 | if (handle == DYNL_KERNEL_HANDLE) |
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| 268 | { |
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| 269 | if (kernel_handle == NULL) |
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| 270 | kernel_handle = dynl_open(NULL); |
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| 271 | handle = kernel_handle; |
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| 272 | } |
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| 273 | return(dlsym(handle, symbol)); |
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| 274 | } |
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| 275 | |
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| 276 | int dynl_close (void *handle) |
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| 277 | { |
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| 278 | return(dlclose (handle)); |
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| 279 | } |
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| 280 | |
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| 281 | const char *dynl_error() |
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| 282 | { |
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| 283 | return(dlerror()); |
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| 284 | } |
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[fc300f] | 285 | #endif /* ELF_SYSTEM */ |
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[35aab3] | 286 | |
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| 287 | /***************************************************************************** |
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| 288 | * SECTION HPUX-9/10 * |
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| 289 | *****************************************************************************/ |
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| 290 | #if defined(HPUX_9) || defined(HPUX_10) |
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[3dbe0bf] | 291 | #define DL_IMPLEMENTED |
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[35aab3] | 292 | #include <dl.h> |
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| 293 | |
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| 294 | typedef char *((*func_ptr) ()); |
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| 295 | |
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[f4399e] | 296 | int dynl_check_opened( /* NOTE: untested */ |
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| 297 | char *filename /* I: filename to check */ |
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| 298 | ) |
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| 299 | { |
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| 300 | struct shl_descriptor *desc; |
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| 301 | for (int idx = 0; shl_get(idx, &desc) != -1; ++idx) |
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| 302 | { |
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| 303 | if (strcmp(filename, desc->filename) == 0) return TRUE; |
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| 304 | } |
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| 305 | return FALSE; |
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| 306 | } |
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| 307 | |
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[35aab3] | 308 | void *dynl_open(char *filename) |
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| 309 | { |
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| 310 | shl_t handle = shl_load(filename, BIND_DEFERRED, 0); |
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| 311 | |
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| 312 | return ((void *) handle); |
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| 313 | } |
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| 314 | |
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[85e68dd] | 315 | void *dynl_sym(void *handle, const char *symbol) |
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[35aab3] | 316 | { |
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| 317 | func_ptr f; |
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[abaf13] | 318 | |
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[35aab3] | 319 | if (handle == DYNL_KERNEL_HANDLE) |
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| 320 | handle = PROG_HANDLE; |
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[abaf13] | 321 | |
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[35aab3] | 322 | if (shl_findsym((shl_t *) & handle, symbol, TYPE_PROCEDURE, &f) == -1) |
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| 323 | { |
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| 324 | if (shl_findsym((shl_t *) & handle, symbol, TYPE_UNDEFINED, &f) == -1) |
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| 325 | { |
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| 326 | f = (func_ptr) NULL; |
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| 327 | } |
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| 328 | } |
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| 329 | return ((void *)f); |
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| 330 | } |
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| 331 | |
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| 332 | int dynl_close (void *handle) |
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| 333 | { |
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| 334 | shl_unload((shl_t) handle); |
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| 335 | return(0); |
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| 336 | } |
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| 337 | |
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| 338 | const char *dynl_error() |
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| 339 | { |
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| 340 | static char errmsg[] = "shl_load failed"; |
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| 341 | |
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| 342 | return errmsg; |
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| 343 | } |
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| 344 | #endif /* HPUX_9 or HPUX_10 */ |
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| 345 | |
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| 346 | /***************************************************************************** |
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[fc300f] | 347 | * SECTION generic: dynamic madules not available |
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[35aab3] | 348 | *****************************************************************************/ |
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[3dbe0bf] | 349 | #ifndef DL_IMPLEMENTED |
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[35aab3] | 350 | |
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[f4399e] | 351 | int dynl_check_opened(char *filename) |
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| 352 | { |
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| 353 | return FALSE; |
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| 354 | } |
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| 355 | |
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[35aab3] | 356 | void *dynl_open(char *filename) |
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| 357 | { |
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| 358 | return(NULL); |
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| 359 | } |
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| 360 | |
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[85e68dd] | 361 | void *dynl_sym(void *handle, const char *symbol) |
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[35aab3] | 362 | { |
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| 363 | return(NULL); |
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| 364 | } |
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| 365 | |
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| 366 | int dynl_close (void *handle) |
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| 367 | { |
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| 368 | return(0); |
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| 369 | } |
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| 370 | |
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| 371 | const char *dynl_error() |
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| 372 | { |
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| 373 | static char errmsg[] = "support for dynamic loading not implemented"; |
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| 374 | return errmsg; |
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| 375 | } |
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[fc300f] | 376 | #endif |
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[35aab3] | 377 | |
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| 378 | #ifdef __cplusplus |
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| 379 | } |
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| 380 | #endif |
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| 381 | |
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| 382 | #endif /* HAVE_DL */ |
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