| /*********************************************************** |
| Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
| The Netherlands. |
| |
| All Rights Reserved |
| |
| Permission to use, copy, modify, and distribute this software and its |
| documentation for any purpose and without fee is hereby granted, |
| provided that the above copyright notice appear in all copies and that |
| both that copyright notice and this permission notice appear in |
| supporting documentation, and that the names of Stichting Mathematisch |
| Centrum or CWI or Corporation for National Research Initiatives or |
| CNRI not be used in advertising or publicity pertaining to |
| distribution of the software without specific, written prior |
| permission. |
| |
| While CWI is the initial source for this software, a modified version |
| is made available by the Corporation for National Research Initiatives |
| (CNRI) at the Internet address ftp://ftp.python.org. |
| |
| STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH |
| REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF |
| MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH |
| CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL |
| DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| PERFORMANCE OF THIS SOFTWARE. |
| |
| ******************************************************************/ |
| |
| /* Support for dynamic loading of extension modules */ |
| |
| #include <ctype.h> /* for isdigit() */ |
| #include <errno.h> /* for global errno */ |
| #include <string.h> /* for strerror() */ |
| #include <stdlib.h> /* for malloc(), free() */ |
| #include <sys/ldr.h> |
| |
| #include "Python.h" |
| #include "importdl.h" |
| |
| |
| #ifdef AIX_GENUINE_CPLUSPLUS |
| #include "/usr/lpp/xlC/include/load.h" |
| #define aix_load loadAndInit |
| #else |
| #define aix_load load |
| #endif |
| |
| |
| extern char *Py_GetProgramName(); |
| |
| typedef struct Module { |
| struct Module *next; |
| void *entry; |
| } Module, *ModulePtr; |
| |
| const struct filedescr _PyImport_DynLoadFiletab[] = { |
| {".so", "rb", C_EXTENSION}, |
| {"module.so", "rb", C_EXTENSION}, |
| {0, 0} |
| }; |
| |
| static int |
| aix_getoldmodules(modlistptr) |
| void **modlistptr; |
| { |
| register ModulePtr modptr, prevmodptr; |
| register struct ld_info *ldiptr; |
| register char *ldibuf; |
| register int errflag, bufsize = 1024; |
| register unsigned int offset; |
| char *progname = Py_GetProgramName(); |
| |
| /* |
| -- Get the list of loaded modules into ld_info structures. |
| */ |
| if ((ldibuf = malloc(bufsize)) == NULL) { |
| PyErr_SetString(PyExc_ImportError, strerror(errno)); |
| return -1; |
| } |
| while ((errflag = loadquery(L_GETINFO, ldibuf, bufsize)) == -1 |
| && errno == ENOMEM) { |
| free(ldibuf); |
| bufsize += 1024; |
| if ((ldibuf = malloc(bufsize)) == NULL) { |
| PyErr_SetString(PyExc_ImportError, strerror(errno)); |
| return -1; |
| } |
| } |
| if (errflag == -1) { |
| PyErr_SetString(PyExc_ImportError, strerror(errno)); |
| return -1; |
| } |
| /* |
| -- Make the modules list from the ld_info structures. |
| */ |
| ldiptr = (struct ld_info *)ldibuf; |
| prevmodptr = NULL; |
| do { |
| if (strstr(progname, ldiptr->ldinfo_filename) == NULL && |
| strstr(ldiptr->ldinfo_filename, "python") == NULL) { |
| /* |
| -- Extract only the modules belonging to the main |
| -- executable + those containing "python" as a |
| -- substring (like the "python[version]" binary or |
| -- "libpython[version].a" in case it's a shared lib). |
| */ |
| offset = (unsigned int)ldiptr->ldinfo_next; |
| ldiptr = (struct ld_info *)((unsigned int) |
| ldiptr + offset); |
| continue; |
| } |
| if ((modptr = (ModulePtr)malloc(sizeof(Module))) == NULL) { |
| PyErr_SetString(PyExc_ImportError, strerror(errno)); |
| while (*modlistptr) { |
| modptr = (ModulePtr)*modlistptr; |
| *modlistptr = (void *)modptr->next; |
| free(modptr); |
| } |
| return -1; |
| } |
| modptr->entry = ldiptr->ldinfo_dataorg; |
| modptr->next = NULL; |
| if (prevmodptr == NULL) |
| *modlistptr = (void *)modptr; |
| else |
| prevmodptr->next = modptr; |
| prevmodptr = modptr; |
| offset = (unsigned int)ldiptr->ldinfo_next; |
| ldiptr = (struct ld_info *)((unsigned int)ldiptr + offset); |
| } while (offset); |
| free(ldibuf); |
| return 0; |
| } |
| |
| static int |
| aix_bindnewmodule(newmoduleptr, modlistptr) |
| void *newmoduleptr; |
| void *modlistptr; |
| { |
| register ModulePtr modptr; |
| |
| /* |
| -- Bind the new module with the list of loaded modules. |
| */ |
| for (modptr = (ModulePtr)modlistptr; modptr; modptr = modptr->next) |
| if (loadbind(0, modptr->entry, newmoduleptr) != 0) |
| return -1; |
| return 0; |
| } |
| |
| static void |
| aix_loaderror(pathname) |
| char *pathname; |
| { |
| |
| char *message[1024], errbuf[1024]; |
| register int i,j; |
| |
| struct errtab { |
| int errNo; |
| char *errstr; |
| } load_errtab[] = { |
| {L_ERROR_TOOMANY, "too many errors, rest skipped."}, |
| {L_ERROR_NOLIB, "can't load library:"}, |
| {L_ERROR_UNDEF, "can't find symbol in library:"}, |
| {L_ERROR_RLDBAD, |
| "RLD index out of range or bad relocation type:"}, |
| {L_ERROR_FORMAT, "not a valid, executable xcoff file:"}, |
| {L_ERROR_MEMBER, |
| "file not an archive or does not contain requested member:"}, |
| {L_ERROR_TYPE, "symbol table mismatch:"}, |
| {L_ERROR_ALIGN, "text alignment in file is wrong."}, |
| {L_ERROR_SYSTEM, "System error:"}, |
| {L_ERROR_ERRNO, NULL} |
| }; |
| |
| #define LOAD_ERRTAB_LEN (sizeof(load_errtab)/sizeof(load_errtab[0])) |
| #define ERRBUF_APPEND(s) strncat(errbuf, s, sizeof(errbuf)-strlen(errbuf)-1) |
| |
| sprintf(errbuf, "from module %.200s ", pathname); |
| |
| if (!loadquery(L_GETMESSAGES, &message[0], sizeof(message))) { |
| ERRBUF_APPEND(strerror(errno)); |
| ERRBUF_APPEND("\n"); |
| } |
| for(i = 0; message[i] && *message[i]; i++) { |
| int nerr = atoi(message[i]); |
| for (j=0; j<LOAD_ERRTAB_LEN ; j++) { |
| if (nerr == load_errtab[j].errNo && load_errtab[j].errstr) |
| ERRBUF_APPEND(load_errtab[j].errstr); |
| } |
| while (isdigit(*message[i])) message[i]++ ; |
| ERRBUF_APPEND(message[i]); |
| ERRBUF_APPEND("\n"); |
| } |
| errbuf[strlen(errbuf)-1] = '\0'; /* trim off last newline */ |
| PyErr_SetString(PyExc_ImportError, errbuf); |
| return; |
| } |
| |
| |
| dl_funcptr _PyImport_GetDynLoadFunc(const char *name, const char *funcname, |
| const char *pathname, FILE *fp) |
| { |
| dl_funcptr p; |
| |
| /* |
| -- Invoke load() with L_NOAUTODEFER leaving the imported symbols |
| -- of the shared module unresolved. Thus we have to resolve them |
| -- explicitely with loadbind. The new module is loaded, then we |
| -- resolve its symbols using the list of already loaded modules |
| -- (only those that belong to the python executable). Get these |
| -- with loadquery(L_GETINFO). |
| */ |
| |
| static void *staticmodlistptr = NULL; |
| |
| if (!staticmodlistptr) |
| if (aix_getoldmodules(&staticmodlistptr) == -1) |
| return NULL; |
| p = (dl_funcptr) aix_load((char *)pathname, L_NOAUTODEFER, 0); |
| if (p == NULL) { |
| aix_loaderror(pathname); |
| return NULL; |
| } |
| if (aix_bindnewmodule((void *)p, staticmodlistptr) == -1) { |
| aix_loaderror(pathname); |
| return NULL; |
| } |
| |
| return p; |
| } |