diff options
Diffstat (limited to 'contrib/perl5/ext/DynaLoader/dl_aix.xs')
| -rw-r--r-- | contrib/perl5/ext/DynaLoader/dl_aix.xs | 744 |
1 files changed, 0 insertions, 744 deletions
diff --git a/contrib/perl5/ext/DynaLoader/dl_aix.xs b/contrib/perl5/ext/DynaLoader/dl_aix.xs deleted file mode 100644 index e29c0f8..0000000 --- a/contrib/perl5/ext/DynaLoader/dl_aix.xs +++ /dev/null @@ -1,744 +0,0 @@ -/* dl_aix.xs - * - * Written: 8/31/94 by Wayne Scott (wscott@ichips.intel.com) - * - * All I did was take Jens-Uwe Mager's libdl emulation library for - * AIX and merged it with the dl_dlopen.xs file to create a dynamic library - * package that works for AIX. - * - * I did change all malloc's, free's, strdup's, calloc's to use the perl - * equilvant. I also removed some stuff we will not need. Call fini() - * on statup... It can probably be trimmed more. - */ - -#define PERLIO_NOT_STDIO 0 - -/* - * @(#)dlfcn.c 1.5 revision of 93/02/14 20:14:17 - * This is an unpublished work copyright (c) 1992 Helios Software GmbH - * 3000 Hannover 1, Germany - */ -#include "EXTERN.h" -#include "perl.h" -#include "XSUB.h" - -/* When building as a 64-bit binary on AIX, define this to get the - * correct structure definitions. Also determines the field-name - * macros and gates some logic in readEntries(). -- Steven N. Hirsch - * <hirschs@btv.ibm.com> */ -#ifdef USE_64_BIT_ALL -# define __XCOFF64__ -# define __XCOFF32__ -#endif - -#include <stdio.h> -#include <errno.h> -#include <string.h> -#include <stdlib.h> -#include <sys/types.h> -#include <sys/ldr.h> -#include <a.out.h> -#undef FREAD -#undef FWRITE -#include <ldfcn.h> - -#ifdef USE_64_BIT_ALL -# define AIX_SCNHDR SCNHDR_64 -# define AIX_LDHDR LDHDR_64 -# define AIX_LDSYM LDSYM_64 -# define AIX_LDHDRSZ LDHDRSZ_64 -#else -# define AIX_SCNHDR SCNHDR -# define AIX_LDHDR LDHDR -# define AIX_LDSYM LDSYM -# define AIX_LDHDRSZ LDHDRSZ -#endif - -/* When using Perl extensions written in C++ the longer versions - * of load() and unload() from libC and libC_r need to be used, - * otherwise statics in the extensions won't get initialized right. - * -- Stephanie Beals <bealzy@us.ibm.com> */ - -/* Older AIX C compilers cannot deal with C++ double-slash comments in - the ibmcxx and/or xlC includes. Since we only need a single file, - be more fine-grained about what's included <hirschs@btv.ibm.com> */ - -#ifdef USE_libC /* The define comes, when it comes, from hints/aix.pl. */ -# define LOAD loadAndInit -# define UNLOAD terminateAndUnload -# if defined(USE_vacpp_load_h) -# include "/usr/vacpp/include/load.h" -# elif defined(USE_ibmcxx_load_h) -# include "/usr/ibmcxx/include/load.h" -# elif defined(USE_xlC_load_h) -# include "/usr/lpp/xlC/include/load.h" -# elif defined(USE_load_h) -# include "/usr/include/load.h" -# endif -#else -# define LOAD load -# define UNLOAD unload -#endif - -/* - * AIX 4.3 does remove some useful definitions from ldfcn.h. Define - * these here to compensate for that lossage. - */ -#ifndef BEGINNING -# define BEGINNING SEEK_SET -#endif -#ifndef FSEEK -# define FSEEK(ldptr,o,p) fseek(IOPTR(ldptr),(p==BEGINNING)?(OFFSET(ldptr) +o):o,p) -#endif -#ifndef FREAD -# define FREAD(p,s,n,ldptr) fread(p,s,n,IOPTR(ldptr)) -#endif - -/* - * We simulate dlopen() et al. through a call to load. Because AIX has - * no call to find an exported symbol we read the loader section of the - * loaded module and build a list of exported symbols and their virtual - * address. - */ - -typedef struct { - char *name; /* the symbols's name */ - void *addr; /* its relocated virtual address */ -} Export, *ExportPtr; - -/* - * The void * handle returned from dlopen is actually a ModulePtr. - */ -typedef struct Module { - struct Module *next; - char *name; /* module name for refcounting */ - int refCnt; /* the number of references */ - void *entry; /* entry point from load */ - int nExports; /* the number of exports found */ - ExportPtr exports; /* the array of exports */ -} Module, *ModulePtr; - -/* - * We keep a list of all loaded modules to be able to reference count - * duplicate dlopen's. - */ -static ModulePtr modList; /* XXX threaded */ - -/* - * The last error from one of the dl* routines is kept in static - * variables here. Each error is returned only once to the caller. - */ -static char errbuf[BUFSIZ]; /* XXX threaded */ -static int errvalid; /* XXX threaded */ - -static void caterr(char *); -static int readExports(ModulePtr); -static void *findMain(void); - -static char *strerror_failed = "(strerror failed)"; -static char *strerror_r_failed = "(strerror_r failed)"; - -char *strerrorcat(char *str, int err) { - int strsiz = strlen(str); - int msgsiz; - char *msg; - -#ifdef USE_THREADS - char *buf = malloc(BUFSIZ); - - if (buf == 0) - return 0; - if (strerror_r(err, buf, BUFSIZ) == 0) - msg = buf; - else - msg = strerror_r_failed; - msgsiz = strlen(msg); - if (strsiz + msgsiz < BUFSIZ) - strcat(str, msg); - free(buf); -#else - if ((msg = strerror(err)) == 0) - msg = strerror_failed; - msgsiz = strlen(msg); /* Note msg = buf and free() above. */ - if (strsiz + msgsiz < BUFSIZ) /* Do not move this after #endif. */ - strcat(str, msg); -#endif - - return str; -} - -char *strerrorcpy(char *str, int err) { - int msgsiz; - char *msg; - -#ifdef USE_THREADS - char *buf = malloc(BUFSIZ); - - if (buf == 0) - return 0; - if (strerror_r(err, buf, BUFSIZ) == 0) - msg = buf; - else - msg = strerror_r_failed; - msgsiz = strlen(msg); - if (msgsiz < BUFSIZ) - strcpy(str, msg); - free(buf); -#else - if ((msg = strerror(err)) == 0) - msg = strerror_failed; - msgsiz = strlen(msg); /* Note msg = buf and free() above. */ - if (msgsiz < BUFSIZ) /* Do not move this after #endif. */ - strcpy(str, msg); -#endif - - return str; -} - -/* ARGSUSED */ -void *dlopen(char *path, int mode) -{ - dTHX; - register ModulePtr mp; - static void *mainModule; /* XXX threaded */ - - /* - * Upon the first call register a terminate handler that will - * close all libraries. - */ - if (mainModule == NULL) { - if ((mainModule = findMain()) == NULL) - return NULL; - } - /* - * Scan the list of modules if have the module already loaded. - */ - for (mp = modList; mp; mp = mp->next) - if (strcmp(mp->name, path) == 0) { - mp->refCnt++; - return mp; - } - Newz(1000,mp,1,Module); - if (mp == NULL) { - errvalid++; - strcpy(errbuf, "Newz: "); - strerrorcat(errbuf, errno); - return NULL; - } - - if ((mp->name = savepv(path)) == NULL) { - errvalid++; - strcpy(errbuf, "savepv: "); - strerrorcat(errbuf, errno); - safefree(mp); - return NULL; - } - - /* - * load should be declared load(const char *...). Thus we - * cast the path to a normal char *. Ugly. - */ - if ((mp->entry = (void *)LOAD((char *)path, -#ifdef L_LIBPATH_EXEC - L_LIBPATH_EXEC | -#endif - L_NOAUTODEFER, - NULL)) == NULL) { - int saverrno = errno; - - safefree(mp->name); - safefree(mp); - errvalid++; - strcpy(errbuf, "dlopen: "); - strcat(errbuf, path); - strcat(errbuf, ": "); - /* - * If AIX says the file is not executable, the error - * can be further described by querying the loader about - * the last error. - */ - if (saverrno == ENOEXEC) { - char *moreinfo[BUFSIZ/sizeof(char *)]; - if (loadquery(L_GETMESSAGES, moreinfo, sizeof(moreinfo)) == -1) - strerrorcpy(errbuf, saverrno); - else { - char **p; - for (p = moreinfo; *p; p++) - caterr(*p); - } - } else - strerrorcat(errbuf, saverrno); - return NULL; - } - mp->refCnt = 1; - mp->next = modList; - modList = mp; - /* - * Assume anonymous exports come from the module this dlopen - * is linked into, that holds true as long as dlopen and all - * of the perl core are in the same shared object. Also bind - * against the main part, in the case a perl is not the main - * part, e.g mod_perl as DSO in Apache so perl modules can - * also reference Apache symbols. - */ - if (loadbind(0, (void *)dlopen, mp->entry) == -1 || - loadbind(0, mainModule, mp->entry)) { - int saverrno = errno; - - dlclose(mp); - errvalid++; - strcpy(errbuf, "loadbind: "); - strerrorcat(errbuf, saverrno); - return NULL; - } - if (readExports(mp) == -1) { - dlclose(mp); - return NULL; - } - return mp; -} - -/* - * Attempt to decipher an AIX loader error message and append it - * to our static error message buffer. - */ -static void caterr(char *s) -{ - register char *p = s; - - while (*p >= '0' && *p <= '9') - p++; - switch(atoi(s)) { - case L_ERROR_TOOMANY: - strcat(errbuf, "too many errors"); - break; - case L_ERROR_NOLIB: - strcat(errbuf, "can't load library"); - strcat(errbuf, p); - break; - case L_ERROR_UNDEF: - strcat(errbuf, "can't find symbol"); - strcat(errbuf, p); - break; - case L_ERROR_RLDBAD: - strcat(errbuf, "bad RLD"); - strcat(errbuf, p); - break; - case L_ERROR_FORMAT: - strcat(errbuf, "bad exec format in"); - strcat(errbuf, p); - break; - case L_ERROR_ERRNO: - strerrorcat(errbuf, atoi(++p)); - break; - default: - strcat(errbuf, s); - break; - } -} - -void *dlsym(void *handle, const char *symbol) -{ - register ModulePtr mp = (ModulePtr)handle; - register ExportPtr ep; - register int i; - - /* - * Could speed up search, but I assume that one assigns - * the result to function pointers anyways. - */ - for (ep = mp->exports, i = mp->nExports; i; i--, ep++) - if (strcmp(ep->name, symbol) == 0) - return ep->addr; - errvalid++; - strcpy(errbuf, "dlsym: undefined symbol "); - strcat(errbuf, symbol); - return NULL; -} - -char *dlerror(void) -{ - if (errvalid) { - errvalid = 0; - return errbuf; - } - return NULL; -} - -int dlclose(void *handle) -{ - register ModulePtr mp = (ModulePtr)handle; - int result; - register ModulePtr mp1; - - if (--mp->refCnt > 0) - return 0; - result = UNLOAD(mp->entry); - if (result == -1) { - errvalid++; - strerrorcpy(errbuf, errno); - } - if (mp->exports) { - register ExportPtr ep; - register int i; - for (ep = mp->exports, i = mp->nExports; i; i--, ep++) - if (ep->name) - safefree(ep->name); - safefree(mp->exports); - } - if (mp == modList) - modList = mp->next; - else { - for (mp1 = modList; mp1; mp1 = mp1->next) - if (mp1->next == mp) { - mp1->next = mp->next; - break; - } - } - safefree(mp->name); - safefree(mp); - return result; -} - -/* Added by Wayne Scott - * This is needed because the ldopen system call calls - * calloc to allocated a block of date. The ldclose call calls free. - * Without this we get this system calloc and perl's free, resulting - * in a "Bad free" message. This way we always use perl's malloc. - */ -void *calloc(size_t ne, size_t sz) -{ - void *out; - - out = (void *) safemalloc(ne*sz); - memzero(out, ne*sz); - return(out); -} - -/* - * Build the export table from the XCOFF .loader section. - */ -static int readExports(ModulePtr mp) -{ - dTHX; - LDFILE *ldp = NULL; - AIX_SCNHDR sh; - AIX_LDHDR *lhp; - char *ldbuf; - AIX_LDSYM *ls; - int i; - ExportPtr ep; - - if ((ldp = ldopen(mp->name, ldp)) == NULL) { - struct ld_info *lp; - char *buf; - int size = 4*1024; - if (errno != ENOENT) { - errvalid++; - strcpy(errbuf, "readExports: "); - strerrorcat(errbuf, errno); - return -1; - } - /* - * The module might be loaded due to the LIBPATH - * environment variable. Search for the loaded - * module using L_GETINFO. - */ - if ((buf = safemalloc(size)) == NULL) { - errvalid++; - strcpy(errbuf, "readExports: "); - strerrorcat(errbuf, errno); - return -1; - } - while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM) { - safefree(buf); - size += 4*1024; - if ((buf = safemalloc(size)) == NULL) { - errvalid++; - strcpy(errbuf, "readExports: "); - strerrorcat(errbuf, errno); - return -1; - } - } - if (i == -1) { - errvalid++; - strcpy(errbuf, "readExports: "); - strerrorcat(errbuf, errno); - safefree(buf); - return -1; - } - /* - * Traverse the list of loaded modules. The entry point - * returned by LOAD() does actually point to the data - * segment origin. - */ - lp = (struct ld_info *)buf; - while (lp) { - if (lp->ldinfo_dataorg == mp->entry) { - ldp = ldopen(lp->ldinfo_filename, ldp); - break; - } - if (lp->ldinfo_next == 0) - lp = NULL; - else - lp = (struct ld_info *)((char *)lp + lp->ldinfo_next); - } - safefree(buf); - if (!ldp) { - errvalid++; - strcpy(errbuf, "readExports: "); - strerrorcat(errbuf, errno); - return -1; - } - } -#ifdef USE_64_BIT_ALL - if (TYPE(ldp) != U803XTOCMAGIC) { -#else - if (TYPE(ldp) != U802TOCMAGIC) { -#endif - errvalid++; - strcpy(errbuf, "readExports: bad magic"); - while(ldclose(ldp) == FAILURE) - ; - return -1; - } - if (ldnshread(ldp, _LOADER, &sh) != SUCCESS) { - errvalid++; - strcpy(errbuf, "readExports: cannot read loader section header"); - while(ldclose(ldp) == FAILURE) - ; - return -1; - } - /* - * We read the complete loader section in one chunk, this makes - * finding long symbol names residing in the string table easier. - */ - if ((ldbuf = (char *)safemalloc(sh.s_size)) == NULL) { - errvalid++; - strcpy(errbuf, "readExports: "); - strerrorcat(errbuf, errno); - while(ldclose(ldp) == FAILURE) - ; - return -1; - } - if (FSEEK(ldp, sh.s_scnptr, BEGINNING) != OKFSEEK) { - errvalid++; - strcpy(errbuf, "readExports: cannot seek to loader section"); - safefree(ldbuf); - while(ldclose(ldp) == FAILURE) - ; - return -1; - } -/* This first case is a hack, since it assumes that the 3rd parameter to - FREAD is 1. See the redefinition of FREAD above to see how this works. */ - if (FREAD(ldbuf, sh.s_size, 1, ldp) != 1) { - errvalid++; - strcpy(errbuf, "readExports: cannot read loader section"); - safefree(ldbuf); - while(ldclose(ldp) == FAILURE) - ; - return -1; - } - lhp = (AIX_LDHDR *)ldbuf; - ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ); - /* - * Count the number of exports to include in our export table. - */ - for (i = lhp->l_nsyms; i; i--, ls++) { - if (!LDR_EXPORT(*ls)) - continue; - mp->nExports++; - } - Newz(1001, mp->exports, mp->nExports, Export); - if (mp->exports == NULL) { - errvalid++; - strcpy(errbuf, "readExports: "); - strerrorcat(errbuf, errno); - safefree(ldbuf); - while(ldclose(ldp) == FAILURE) - ; - return -1; - } - /* - * Fill in the export table. All entries are relative to - * the entry point we got from load. - */ - ep = mp->exports; - ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ); - for (i = lhp->l_nsyms; i; i--, ls++) { - char *symname; - if (!LDR_EXPORT(*ls)) - continue; -#ifndef USE_64_BIT_ALL - if (ls->l_zeroes == 0) -#endif - symname = ls->l_offset+lhp->l_stoff+ldbuf; -#ifndef USE_64_BIT_ALL - else - symname = ls->l_name; -#endif - ep->name = savepv(symname); - ep->addr = (void *)((unsigned long)mp->entry + ls->l_value); - ep++; - } - safefree(ldbuf); - while(ldclose(ldp) == FAILURE) - ; - return 0; -} - -/* - * Find the main modules entry point. This is used as export pointer - * for loadbind() to be able to resolve references to the main part. - */ -static void * findMain(void) -{ - struct ld_info *lp; - char *buf; - int size = 4*1024; - int i; - void *ret; - - if ((buf = safemalloc(size)) == NULL) { - errvalid++; - strcpy(errbuf, "findMain: "); - strerrorcat(errbuf, errno); - return NULL; - } - while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM) { - safefree(buf); - size += 4*1024; - if ((buf = safemalloc(size)) == NULL) { - errvalid++; - strcpy(errbuf, "findMain: "); - strerrorcat(errbuf, errno); - return NULL; - } - } - if (i == -1) { - errvalid++; - strcpy(errbuf, "findMain: "); - strerrorcat(errbuf, errno); - safefree(buf); - return NULL; - } - /* - * The first entry is the main module. The entry point - * returned by load() does actually point to the data - * segment origin. - */ - lp = (struct ld_info *)buf; - ret = lp->ldinfo_dataorg; - safefree(buf); - return ret; -} - -/* dl_dlopen.xs - * - * Platform: SunOS/Solaris, possibly others which use dlopen. - * Author: Paul Marquess (Paul.Marquess@btinternet.com) - * Created: 10th July 1994 - * - * Modified: - * 15th July 1994 - Added code to explicitly save any error messages. - * 3rd August 1994 - Upgraded to v3 spec. - * 9th August 1994 - Changed to use IV - * 10th August 1994 - Tim Bunce: Added RTLD_LAZY, switchable debugging, - * basic FreeBSD support, removed ClearError - * - */ - -/* Porting notes: - - see dl_dlopen.xs - -*/ - -#include "dlutils.c" /* SaveError() etc */ - - -static void -dl_private_init(pTHX) -{ - (void)dl_generic_private_init(aTHX); -} - -MODULE = DynaLoader PACKAGE = DynaLoader - -BOOT: - (void)dl_private_init(aTHX); - - -void * -dl_load_file(filename, flags=0) - char * filename - int flags - CODE: - DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags)); - if (flags & 0x01) - Perl_warn(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename); - RETVAL = dlopen(filename, 1) ; - DLDEBUG(2,PerlIO_printf(Perl_debug_log, " libref=%x\n", RETVAL)); - ST(0) = sv_newmortal() ; - if (RETVAL == NULL) - SaveError(aTHX_ "%s",dlerror()) ; - else - sv_setiv( ST(0), PTR2IV(RETVAL) ); - -int -dl_unload_file(libref) - void * libref - CODE: - DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_unload_file(%lx):\n", libref)); - RETVAL = (dlclose(libref) == 0 ? 1 : 0); - if (!RETVAL) - SaveError(aTHX_ "%s", dlerror()) ; - DLDEBUG(2,PerlIO_printf(Perl_debug_log, " retval = %d\n", RETVAL)); - OUTPUT: - RETVAL - -void * -dl_find_symbol(libhandle, symbolname) - void * libhandle - char * symbolname - CODE: - DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_find_symbol(handle=%x, symbol=%s)\n", - libhandle, symbolname)); - RETVAL = dlsym(libhandle, symbolname); - DLDEBUG(2,PerlIO_printf(Perl_debug_log, " symbolref = %x\n", RETVAL)); - ST(0) = sv_newmortal() ; - if (RETVAL == NULL) - SaveError(aTHX_ "%s",dlerror()) ; - else - sv_setiv( ST(0), PTR2IV(RETVAL)); - - -void -dl_undef_symbols() - PPCODE: - - - -# These functions should not need changing on any platform: - -void -dl_install_xsub(perl_name, symref, filename="$Package") - char * perl_name - void * symref - char * filename - CODE: - DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n", - perl_name, symref)); - ST(0) = sv_2mortal(newRV((SV*)newXS(perl_name, - (void(*)(pTHX_ CV *))symref, - filename))); - - -char * -dl_error() - CODE: - RETVAL = LastError ; - OUTPUT: - RETVAL - -# end. |
