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Diffstat (limited to 'src/backend/port/aix/dlfcn.c')
-rw-r--r--src/backend/port/aix/dlfcn.c393
1 files changed, 234 insertions, 159 deletions
diff --git a/src/backend/port/aix/dlfcn.c b/src/backend/port/aix/dlfcn.c
index 4e95271e098..58a3dea3c12 100644
--- a/src/backend/port/aix/dlfcn.c
+++ b/src/backend/port/aix/dlfcn.c
@@ -22,33 +22,36 @@
* address.
*/
-typedef struct {
- char *name; /* the symbols's name */
- void *addr; /* its relocated virtual address */
-} Export, *ExportPtr;
+typedef struct
+{
+ char *name; /* the symbols's name */
+ void *addr; /* its relocated virtual address */
+} Export, *ExportPtr;
/*
* xlC uses the following structure to list its constructors and
* destructors. This is gleaned from the output of munch.
*/
-typedef struct {
- void (*init)(void); /* call static constructors */
- void (*term)(void); /* call static destructors */
-} Cdtor, *CdtorPtr;
+typedef struct
+{
+ void (*init) (void); /* call static constructors */
+ void (*term) (void); /* call static destructors */
+} Cdtor, *CdtorPtr;
/*
* 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 */
- struct dl_info *info; /* optional init/terminate functions */
- CdtorPtr cdtors; /* optional C++ constructors */
- int nExports; /* the number of exports found */
- ExportPtr exports; /* the array of exports */
-} Module, *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 */
+ struct dl_info *info; /* optional init/terminate functions */
+ CdtorPtr cdtors; /* optional C++ constructors */
+ 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 call the fini
@@ -60,98 +63,116 @@ static ModulePtr modList;
* 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];
-static int errvalid;
+static char errbuf[BUFSIZ];
+static int errvalid;
-extern char *strdup(const char *);
-static void caterr(char *);
-static int readExports(ModulePtr);
-static void terminate(void);
-static void *findMain(void);
+extern char *strdup(const char *);
+static void caterr(char *);
+static int readExports(ModulePtr);
+static void terminate(void);
+static void *findMain(void);
-void *dlopen(const char *path, int mode)
+void *
+dlopen(const char *path, int mode)
{
register ModulePtr mp;
- static void *mainModule;
+ static void *mainModule;
/*
- * Upon the first call register a terminate handler that will
- * close all libraries. Also get a reference to the main module
- * for use with loadbind.
+ * Upon the first call register a terminate handler that will close
+ * all libraries. Also get a reference to the main module for use with
+ * loadbind.
*/
- if (!mainModule) {
+ if (!mainModule)
+ {
if ((mainModule = findMain()) == NULL)
return NULL;
atexit(terminate);
}
+
/*
* Scan the list of modules if we have the module already loaded.
*/
for (mp = modList; mp; mp = mp->next)
- if (strcmp(mp->name, path) == 0) {
+ if (strcmp(mp->name, path) == 0)
+ {
mp->refCnt++;
return mp;
}
- if ((mp = (ModulePtr)calloc(1, sizeof(*mp))) == NULL) {
+ if ((mp = (ModulePtr) calloc(1, sizeof(*mp))) == NULL)
+ {
errvalid++;
strcpy(errbuf, "calloc: ");
strcat(errbuf, strerror(errno));
return NULL;
}
- if ((mp->name = strdup(path)) == NULL) {
+ if ((mp->name = strdup(path)) == NULL)
+ {
errvalid++;
strcpy(errbuf, "strdup: ");
strcat(errbuf, strerror(errno));
free(mp);
return NULL;
}
+
/*
- * load should be declared load(const char *...). Thus we
- * cast the path to a normal char *. Ugly.
+ * load should be declared load(const char *...). Thus we cast the
+ * path to a normal char *. Ugly.
*/
- if ((mp->entry = (void *)load((char *)path, L_NOAUTODEFER, NULL)) == NULL) {
+ if ((mp->entry = (void *) load((char *) path, L_NOAUTODEFER, NULL)) == NULL)
+ {
free(mp->name);
free(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 AIX says the file is not executable, the error can be
+ * further described by querying the loader about the last error.
*/
- if (errno == ENOEXEC) {
- char *tmp[BUFSIZ/sizeof(char *)];
+ if (errno == ENOEXEC)
+ {
+ char *tmp[BUFSIZ / sizeof(char *)];
+
if (loadquery(L_GETMESSAGES, tmp, sizeof(tmp)) == -1)
strcpy(errbuf, strerror(errno));
- else {
- char **p;
+ else
+ {
+ char **p;
+
for (p = tmp; *p; p++)
caterr(*p);
}
- } else
+ }
+ else
strcat(errbuf, strerror(errno));
return NULL;
}
mp->refCnt = 1;
mp->next = modList;
modList = mp;
- if (loadbind(0, mainModule, mp->entry) == -1) {
+ if (loadbind(0, mainModule, mp->entry) == -1)
+ {
dlclose(mp);
errvalid++;
strcpy(errbuf, "loadbind: ");
strcat(errbuf, strerror(errno));
return NULL;
}
+
/*
- * If the user wants global binding, loadbind against all other
- * loaded modules.
+ * If the user wants global binding, loadbind against all other loaded
+ * modules.
*/
- if (mode & RTLD_GLOBAL) {
+ if (mode & RTLD_GLOBAL)
+ {
register ModulePtr mp1;
+
for (mp1 = mp->next; mp1; mp1 = mp1->next)
- if (loadbind(0, mp1->entry, mp->entry) == -1) {
+ if (loadbind(0, mp1->entry, mp->entry) == -1)
+ {
dlclose(mp);
errvalid++;
strcpy(errbuf, "loadbind: ");
@@ -159,28 +180,36 @@ void *dlopen(const char *path, int mode)
return NULL;
}
}
- if (readExports(mp) == -1) {
+ if (readExports(mp) == -1)
+ {
dlclose(mp);
return NULL;
}
+
/*
* If there is a dl_info structure, call the init function.
*/
- if (mp->info = (struct dl_info *)dlsym(mp, "dl_info")) {
+ if (mp->info = (struct dl_info *) dlsym(mp, "dl_info"))
+ {
if (mp->info->init)
- (*mp->info->init)();
- } else
+ (*mp->info->init) ();
+ }
+ else
errvalid = 0;
+
/*
- * If the shared object was compiled using xlC we will need
- * to call static constructors (and later on dlclose destructors).
+ * If the shared object was compiled using xlC we will need to call
+ * static constructors (and later on dlclose destructors).
*/
- if (mp->cdtors = (CdtorPtr)dlsym(mp, "__cdtors")) {
- while (mp->cdtors->init) {
- (*mp->cdtors->init)();
+ if (mp->cdtors = (CdtorPtr) dlsym(mp, "__cdtors"))
+ {
+ while (mp->cdtors->init)
+ {
+ (*mp->cdtors->init) ();
mp->cdtors++;
}
- } else
+ }
+ else
errvalid = 0;
return mp;
}
@@ -189,13 +218,15 @@ void *dlopen(const char *path, int mode)
* Attempt to decipher an AIX loader error message and append it
* to our static error message buffer.
*/
-static void caterr(char *s)
+static void
+caterr(char *s)
{
- register char *p = s;
+ register char *p = s;
while (*p >= '0' && *p <= '9')
p++;
- switch(atoi(s)) {
+ switch (atoi(s))
+ {
case L_ERROR_TOOMANY:
strcat(errbuf, "to many errors");
break;
@@ -224,15 +255,16 @@ static void caterr(char *s)
}
}
-void *dlsym(void *handle, const char *symbol)
+void *
+dlsym(void *handle, const char *symbol)
{
- register ModulePtr mp = (ModulePtr)handle;
+ register ModulePtr mp = (ModulePtr) handle;
register ExportPtr ep;
- register int i;
+ register int i;
/*
- * Could speed up the search, but I assume that one assigns
- * the result to function pointers anyways.
+ * Could speed up the 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)
@@ -243,38 +275,45 @@ void *dlsym(void *handle, const char *symbol)
return NULL;
}
-char *dlerror(void)
+char *
+dlerror(void)
{
- if (errvalid) {
+ if (errvalid)
+ {
errvalid = 0;
return errbuf;
}
return NULL;
}
-int dlclose(void *handle)
+int
+dlclose(void *handle)
{
- register ModulePtr mp = (ModulePtr)handle;
- int result;
+ register ModulePtr mp = (ModulePtr) handle;
+ int result;
register ModulePtr mp1;
if (--mp->refCnt > 0)
return 0;
if (mp->info && mp->info->fini)
- (*mp->info->fini)();
+ (*mp->info->fini) ();
if (mp->cdtors)
- while (mp->cdtors->term) {
- (*mp->cdtors->term)();
+ while (mp->cdtors->term)
+ {
+ (*mp->cdtors->term) ();
mp->cdtors++;
}
result = unload(mp->entry);
- if (result == -1) {
+ if (result == -1)
+ {
errvalid++;
strcpy(errbuf, strerror(errno));
}
- if (mp->exports) {
+ if (mp->exports)
+ {
register ExportPtr ep;
- register int i;
+ register int i;
+
for (ep = mp->exports, i = mp->nExports; i; i--, ep++)
if (ep->name)
free(ep->name);
@@ -282,9 +321,11 @@ int dlclose(void *handle)
}
if (mp == modList)
modList = mp->next;
- else {
+ else
+ {
for (mp1 = modList; mp1; mp1 = mp1->next)
- if (mp1->next == mp) {
+ if (mp1->next == mp)
+ {
mp1->next = mp->next;
break;
}
@@ -294,7 +335,8 @@ int dlclose(void *handle)
return result;
}
-static void terminate(void)
+static void
+terminate(void)
{
while (modList)
dlclose(modList);
@@ -303,180 +345,208 @@ static void terminate(void)
/*
* Build the export table from the XCOFF .loader section.
*/
-static int readExports(ModulePtr mp)
+static int
+readExports(ModulePtr mp)
{
- LDFILE *ldp = NULL;
- SCNHDR sh, shdata;
- LDHDR *lhp;
- char *ldbuf;
- LDSYM *ls;
- int i;
- ExportPtr ep;
-
- if ((ldp = ldopen(mp->name, ldp)) == NULL) {
+ LDFILE *ldp = NULL;
+ SCNHDR sh,
+ shdata;
+ LDHDR *lhp;
+ char *ldbuf;
+ 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) {
+ char *buf;
+ int size = 4 * 1024;
+
+ if (errno != ENOENT)
+ {
errvalid++;
strcpy(errbuf, "readExports: ");
strcat(errbuf, strerror(errno));
return -1;
}
+
/*
- * The module might be loaded due to the LIBPATH
- * environment variable. Search for the loaded
- * module using L_GETINFO.
+ * The module might be loaded due to the LIBPATH environment
+ * variable. Search for the loaded module using L_GETINFO.
*/
- if ((buf = malloc(size)) == NULL) {
+ if ((buf = malloc(size)) == NULL)
+ {
errvalid++;
strcpy(errbuf, "readExports: ");
strcat(errbuf, strerror(errno));
return -1;
}
- while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM) {
+ while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM)
+ {
free(buf);
- size += 4*1024;
- if ((buf = malloc(size)) == NULL) {
+ size += 4 * 1024;
+ if ((buf = malloc(size)) == NULL)
+ {
errvalid++;
strcpy(errbuf, "readExports: ");
strcat(errbuf, strerror(errno));
return -1;
}
}
- if (i == -1) {
+ if (i == -1)
+ {
errvalid++;
strcpy(errbuf, "readExports: ");
strcat(errbuf, strerror(errno));
free(buf);
return -1;
}
+
/*
- * Traverse the list of loaded modules. The entry point
- * returned by load() does actually point to the data
- * segment origin.
+ * 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) {
+ 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);
+ lp = (struct ld_info *) ((char *) lp + lp->ldinfo_next);
}
free(buf);
- if (!ldp) {
+ if (!ldp)
+ {
errvalid++;
strcpy(errbuf, "readExports: ");
strcat(errbuf, strerror(errno));
return -1;
}
}
- if (TYPE(ldp) != U802TOCMAGIC) {
+ if (TYPE(ldp) != U802TOCMAGIC)
+ {
errvalid++;
strcpy(errbuf, "readExports: bad magic");
- while(ldclose(ldp) == FAILURE)
+ while (ldclose(ldp) == FAILURE)
;
return -1;
}
+
/*
- * Get the padding for the data section. This is needed for
- * AIX 4.1 compilers. This is used when building the final
- * function pointer to the exported symbol.
+ * Get the padding for the data section. This is needed for AIX 4.1
+ * compilers. This is used when building the final function pointer to
+ * the exported symbol.
*/
- if (ldnshread(ldp, _DATA, &shdata) != SUCCESS) {
+ if (ldnshread(ldp, _DATA, &shdata) != SUCCESS)
+ {
errvalid++;
strcpy(errbuf, "readExports: cannot read data section header");
- while(ldclose(ldp) == FAILURE)
+ while (ldclose(ldp) == FAILURE)
;
return -1;
}
- if (ldnshread(ldp, _LOADER, &sh) != SUCCESS) {
+ if (ldnshread(ldp, _LOADER, &sh) != SUCCESS)
+ {
errvalid++;
strcpy(errbuf, "readExports: cannot read loader section header");
- while(ldclose(ldp) == FAILURE)
+ 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 *)malloc(sh.s_size)) == NULL) {
+ if ((ldbuf = (char *) malloc(sh.s_size)) == NULL)
+ {
errvalid++;
strcpy(errbuf, "readExports: ");
strcat(errbuf, strerror(errno));
- while(ldclose(ldp) == FAILURE)
+ while (ldclose(ldp) == FAILURE)
;
return -1;
}
- if (FSEEK(ldp, sh.s_scnptr, BEGINNING) != OKFSEEK) {
+ if (FSEEK(ldp, sh.s_scnptr, BEGINNING) != OKFSEEK)
+ {
errvalid++;
strcpy(errbuf, "readExports: cannot seek to loader section");
free(ldbuf);
- while(ldclose(ldp) == FAILURE)
+ while (ldclose(ldp) == FAILURE)
;
return -1;
}
- if (FREAD(ldbuf, sh.s_size, 1, ldp) != 1) {
+ if (FREAD(ldbuf, sh.s_size, 1, ldp) != 1)
+ {
errvalid++;
strcpy(errbuf, "readExports: cannot read loader section");
free(ldbuf);
- while(ldclose(ldp) == FAILURE)
+ while (ldclose(ldp) == FAILURE)
;
return -1;
}
- lhp = (LDHDR *)ldbuf;
- ls = (LDSYM *)(ldbuf+LDHDRSZ);
+ lhp = (LDHDR *) ldbuf;
+ ls = (LDSYM *) (ldbuf + LDHDRSZ);
+
/*
* Count the number of exports to include in our export table.
*/
- for (i = lhp->l_nsyms; i; i--, ls++) {
+ for (i = lhp->l_nsyms; i; i--, ls++)
+ {
if (!LDR_EXPORT(*ls))
continue;
mp->nExports++;
}
- if ((mp->exports = (ExportPtr)calloc(mp->nExports, sizeof(*mp->exports))) == NULL) {
+ if ((mp->exports = (ExportPtr) calloc(mp->nExports, sizeof(*mp->exports))) == NULL)
+ {
errvalid++;
strcpy(errbuf, "readExports: ");
strcat(errbuf, strerror(errno));
free(ldbuf);
- while(ldclose(ldp) == FAILURE)
+ while (ldclose(ldp) == FAILURE)
;
return -1;
}
+
/*
- * Fill in the export table. All entries are relative to
- * the entry point we got from load.
+ * Fill in the export table. All entries are relative to the entry
+ * point we got from load.
*/
ep = mp->exports;
- ls = (LDSYM *)(ldbuf+LDHDRSZ);
- for (i = lhp->l_nsyms; i; i--, ls++) {
- char *symname;
- char tmpsym[SYMNMLEN+1];
+ ls = (LDSYM *) (ldbuf + LDHDRSZ);
+ for (i = lhp->l_nsyms; i; i--, ls++)
+ {
+ char *symname;
+ char tmpsym[SYMNMLEN + 1];
+
if (!LDR_EXPORT(*ls))
continue;
if (ls->l_zeroes == 0)
- symname = ls->l_offset+lhp->l_stoff+ldbuf;
- else {
+ symname = ls->l_offset + lhp->l_stoff + ldbuf;
+ else
+ {
+
/*
- * The l_name member is not zero terminated, we
- * must copy the first SYMNMLEN chars and make
- * sure we have a zero byte at the end.
+ * The l_name member is not zero terminated, we must copy the
+ * first SYMNMLEN chars and make sure we have a zero byte at
+ * the end.
*/
strNcpy(tmpsym, ls->l_name, SYMNMLEN);
symname = tmpsym;
}
ep->name = strdup(symname);
- ep->addr = (void *)((unsigned long)mp->entry +
- ls->l_value - shdata.s_vaddr);
+ ep->addr = (void *) ((unsigned long) mp->entry +
+ ls->l_value - shdata.s_vaddr);
ep++;
}
free(ldbuf);
- while(ldclose(ldp) == FAILURE)
+ while (ldclose(ldp) == FAILURE)
;
return 0;
}
@@ -485,43 +555,48 @@ static int readExports(ModulePtr mp)
* 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)
+static void *
+findMain(void)
{
struct ld_info *lp;
- char *buf;
- int size = 4*1024;
- int i;
- void *ret;
+ char *buf;
+ int size = 4 * 1024;
+ int i;
+ void *ret;
- if ((buf = malloc(size)) == NULL) {
+ if ((buf = malloc(size)) == NULL)
+ {
errvalid++;
strcpy(errbuf, "findMain: ");
strcat(errbuf, strerror(errno));
return NULL;
}
- while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM) {
+ while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM)
+ {
free(buf);
- size += 4*1024;
- if ((buf = malloc(size)) == NULL) {
+ size += 4 * 1024;
+ if ((buf = malloc(size)) == NULL)
+ {
errvalid++;
strcpy(errbuf, "findMain: ");
strcat(errbuf, strerror(errno));
return NULL;
}
}
- if (i == -1) {
+ if (i == -1)
+ {
errvalid++;
strcpy(errbuf, "findMain: ");
strcat(errbuf, strerror(errno));
free(buf);
return NULL;
}
+
/*
- * The first entry is the main module. The entry point
- * returned by load() does actually point to the data
- * segment origin.
+ * 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;
+ lp = (struct ld_info *) buf;
ret = lp->ldinfo_dataorg;
free(buf);
return ret;
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-09 03:14:34 +0000