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authorEric Andersen <andersen@codepoet.org>2004-02-10 09:26:57 +0000
committerEric Andersen <andersen@codepoet.org>2004-02-10 09:26:57 +0000
commit70709408336e483de74947eb53e9ba01ef4ab140 (patch)
treefe17e15c0f272c571607172fc5c89d094de5f60c /ldso/ldso/readelflib1.c
parentc201ba7c107edbb5fe81c641e87715a4930a4ff1 (diff)
Rework file naming, aiming for at least a vague level of consistancy
Diffstat (limited to 'ldso/ldso/readelflib1.c')
-rw-r--r--ldso/ldso/readelflib1.c926
1 files changed, 0 insertions, 926 deletions
diff --git a/ldso/ldso/readelflib1.c b/ldso/ldso/readelflib1.c
deleted file mode 100644
index 5a1c89230..000000000
--- a/ldso/ldso/readelflib1.c
+++ /dev/null
@@ -1,926 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * This file contains the helper routines to load an ELF shared
- * library into memory and add the symbol table info to the chain.
- *
- * Copyright (C) 2000-2004 by Erik Andersen <andersen@codpoet.org>
- * Copyright (c) 1994-2000 Eric Youngdale, Peter MacDonald,
- * David Engel, Hongjiu Lu and Mitch D'Souza
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. The name of the above contributors may not be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-
-#include "ldso.h"
-
-#ifdef USE_CACHE
-
-static caddr_t _dl_cache_addr = NULL;
-static size_t _dl_cache_size = 0;
-
-int _dl_map_cache(void)
-{
- int fd;
- struct stat st;
- header_t *header;
- libentry_t *libent;
- int i, strtabsize;
-
- if (_dl_cache_addr == (caddr_t) - 1)
- return -1;
- else if (_dl_cache_addr != NULL)
- return 0;
-
- if (_dl_stat(LDSO_CACHE, &st)
- || (fd = _dl_open(LDSO_CACHE, O_RDONLY, 0)) < 0) {
- _dl_dprintf(2, "%s: can't open cache '%s'\n", _dl_progname, LDSO_CACHE);
- _dl_cache_addr = (caddr_t) - 1; /* so we won't try again */
- return -1;
- }
-
- _dl_cache_size = st.st_size;
- _dl_cache_addr = (caddr_t) _dl_mmap(0, _dl_cache_size, PROT_READ, MAP_SHARED, fd, 0);
- _dl_close(fd);
- if (_dl_mmap_check_error(_dl_cache_addr)) {
- _dl_dprintf(2, "%s: can't map cache '%s'\n",
- _dl_progname, LDSO_CACHE);
- return -1;
- }
-
- header = (header_t *) _dl_cache_addr;
-
- if (_dl_cache_size < sizeof(header_t) ||
- _dl_memcmp(header->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN)
- || _dl_memcmp(header->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN)
- || _dl_cache_size <
- (sizeof(header_t) + header->nlibs * sizeof(libentry_t))
- || _dl_cache_addr[_dl_cache_size - 1] != '\0')
- {
- _dl_dprintf(2, "%s: cache '%s' is corrupt\n", _dl_progname,
- LDSO_CACHE);
- goto fail;
- }
-
- strtabsize = _dl_cache_size - sizeof(header_t) -
- header->nlibs * sizeof(libentry_t);
- libent = (libentry_t *) & header[1];
-
- for (i = 0; i < header->nlibs; i++) {
- if (libent[i].sooffset >= strtabsize ||
- libent[i].liboffset >= strtabsize)
- {
- _dl_dprintf(2, "%s: cache '%s' is corrupt\n", _dl_progname, LDSO_CACHE);
- goto fail;
- }
- }
-
- return 0;
-
-fail:
- _dl_munmap(_dl_cache_addr, _dl_cache_size);
- _dl_cache_addr = (caddr_t) - 1;
- return -1;
-}
-
-int _dl_unmap_cache(void)
-{
- if (_dl_cache_addr == NULL || _dl_cache_addr == (caddr_t) - 1)
- return -1;
-
-#if 1
- _dl_munmap(_dl_cache_addr, _dl_cache_size);
- _dl_cache_addr = NULL;
-#endif
-
- return 0;
-}
-#endif
-
-/* This function's behavior must exactly match that
- * in uClibc/ldso/util/ldd.c */
-static struct elf_resolve *
-search_for_named_library(const char *name, int secure, const char *path_list,
- struct dyn_elf **rpnt)
-{
- int i, count = 1;
- char *path, *path_n;
- char mylibname[2050];
- struct elf_resolve *tpnt1;
-
- if (path_list==NULL)
- return NULL;
-
- /* We need a writable copy of this string */
- path = _dl_strdup(path_list);
- if (!path) {
- _dl_dprintf(2, "Out of memory!\n");
- _dl_exit(0);
- }
-
-
- /* Unlike ldd.c, don't bother to eliminate double //s */
-
-
- /* Replace colons with zeros in path_list and count them */
- for(i=_dl_strlen(path); i > 0; i--) {
- if (path[i]==':') {
- path[i]=0;
- count++;
- }
- }
-
- path_n = path;
- for (i = 0; i < count; i++) {
- _dl_strcpy(mylibname, path_n);
- _dl_strcat(mylibname, "/");
- _dl_strcat(mylibname, name);
- if ((tpnt1 = _dl_load_elf_shared_library(secure, rpnt, mylibname)) != NULL)
- {
- return tpnt1;
- }
- path_n += (_dl_strlen(path_n) + 1);
- }
- return NULL;
-}
-
-/* Check if the named library is already loaded... */
-struct elf_resolve *_dl_check_if_named_library_is_loaded(const char *full_libname,
- int trace_loaded_objects)
-{
- const char *pnt, *pnt1;
- struct elf_resolve *tpnt1;
- const char *libname, *libname2;
- static const char libc[] = "libc.so.";
- static const char aborted_wrong_lib[] = "%s: aborted attempt to load %s!\n";
-
- pnt = libname = full_libname;
-
-#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug)
- _dl_dprintf(_dl_debug_file, "Checking if '%s' is already loaded\n", full_libname);
-#endif
- /* quick hack to ensure mylibname buffer doesn't overflow. don't
- allow full_libname or any directory to be longer than 1024. */
- if (_dl_strlen(full_libname) > 1024)
- return NULL;
-
- /* Skip over any initial initial './' and '/' stuff to
- * get the short form libname with no path garbage */
- pnt1 = _dl_strrchr(pnt, '/');
- if (pnt1) {
- libname = pnt1 + 1;
- }
-
- /* Make sure they are not trying to load the wrong C library!
- * This sometimes happens esp with shared libraries when the
- * library path is somehow wrong! */
-#define isdigit(c) (c >= '0' && c <= '9')
- if ((_dl_strncmp(libname, libc, 8) == 0) && _dl_strlen(libname) >=8 &&
- isdigit(libname[8]))
- {
- /* Abort attempts to load glibc, libc5, etc */
- if ( libname[8]!='0') {
- if (!trace_loaded_objects) {
- _dl_dprintf(2, aborted_wrong_lib, libname, _dl_progname);
- _dl_exit(1);
- }
- return NULL;
- }
- }
-
- /* Critical step! Weed out duplicates early to avoid
- * function aliasing, which wastes memory, and causes
- * really bad things to happen with weaks and globals. */
- for (tpnt1 = _dl_loaded_modules; tpnt1; tpnt1 = tpnt1->next) {
-
- /* Skip over any initial initial './' and '/' stuff to
- * get the short form libname with no path garbage */
- libname2 = tpnt1->libname;
- pnt1 = _dl_strrchr(libname2, '/');
- if (pnt1) {
- libname2 = pnt1 + 1;
- }
-
- if (_dl_strcmp(libname2, libname) == 0) {
- /* Well, that was certainly easy */
- return tpnt1;
- }
- }
-
- return NULL;
-}
-
-
-/* Used to return error codes back to dlopen et. al. */
-unsigned long _dl_error_number;
-unsigned long _dl_internal_error_number;
-
-struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt,
- struct elf_resolve *tpnt, char *full_libname, int trace_loaded_objects)
-{
- char *pnt, *pnt1;
- struct elf_resolve *tpnt1;
- char *libname;
-
- _dl_internal_error_number = 0;
- libname = full_libname;
-
- /* quick hack to ensure mylibname buffer doesn't overflow. don't
- allow full_libname or any directory to be longer than 1024. */
- if (_dl_strlen(full_libname) > 1024)
- goto goof;
-
- /* Skip over any initial initial './' and '/' stuff to
- * get the short form libname with no path garbage */
- pnt1 = _dl_strrchr(libname, '/');
- if (pnt1) {
- libname = pnt1 + 1;
- }
-
- /* Critical step! Weed out duplicates early to avoid
- * function aliasing, which wastes memory, and causes
- * really bad things to happen with weaks and globals. */
- if ((tpnt1=_dl_check_if_named_library_is_loaded(libname, trace_loaded_objects))!=NULL)
- return tpnt1;
-
-#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) _dl_dprintf(_dl_debug_file, "\tfind library='%s'; searching\n", libname);
-#endif
- /* If the filename has any '/', try it straight and leave it at that.
- For IBCS2 compatibility under linux, we substitute the string
- /usr/i486-sysv4/lib for /usr/lib in library names. */
-
- if (libname != full_libname) {
-#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) _dl_dprintf(_dl_debug_file, "\ttrying file='%s'\n", full_libname);
-#endif
- tpnt1 = _dl_load_elf_shared_library(secure, rpnt, full_libname);
- if (tpnt1) {
- return tpnt1;
- }
- //goto goof;
- }
-
- /*
- * The ABI specifies that RPATH is searched before LD_*_PATH or
- * the default path of /usr/lib. Check in rpath directories.
- */
- for (tpnt = _dl_loaded_modules; tpnt; tpnt = tpnt->next) {
- if (tpnt->libtype == elf_executable) {
- pnt = (char *) tpnt->dynamic_info[DT_RPATH];
- if (pnt) {
- pnt += (unsigned long) tpnt->loadaddr + tpnt->dynamic_info[DT_STRTAB];
-#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) _dl_dprintf(_dl_debug_file, "\tsearching RPATH='%s'\n", pnt);
-#endif
- if ((tpnt1 = search_for_named_library(libname, secure, pnt, rpnt)) != NULL)
- {
- return tpnt1;
- }
- }
- }
- }
-
- /* Check in LD_{ELF_}LIBRARY_PATH, if specified and allowed */
- if (_dl_library_path) {
-#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) _dl_dprintf(_dl_debug_file, "\tsearching LD_LIBRARY_PATH='%s'\n", _dl_library_path);
-#endif
- if ((tpnt1 = search_for_named_library(libname, secure, _dl_library_path, rpnt)) != NULL)
- {
- return tpnt1;
- }
- }
-
- /*
- * Where should the cache be searched? There is no such concept in the
- * ABI, so we have some flexibility here. For now, search it before
- * the hard coded paths that follow (i.e before /lib and /usr/lib).
- */
-#ifdef USE_CACHE
- if (_dl_cache_addr != NULL && _dl_cache_addr != (caddr_t) - 1) {
- int i;
- header_t *header = (header_t *) _dl_cache_addr;
- libentry_t *libent = (libentry_t *) & header[1];
- char *strs = (char *) &libent[header->nlibs];
-
-#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) _dl_dprintf(_dl_debug_file, "\tsearching cache='%s'\n", LDSO_CACHE);
-#endif
- for (i = 0; i < header->nlibs; i++) {
- if ((libent[i].flags == LIB_ELF ||
- libent[i].flags == LIB_ELF_LIBC5) &&
- _dl_strcmp(libname, strs + libent[i].sooffset) == 0 &&
- (tpnt1 = _dl_load_elf_shared_library(secure,
- rpnt, strs + libent[i].liboffset)))
- return tpnt1;
- }
- }
-#endif
-
- /* Look for libraries wherever the shared library loader
- * was installed */
-#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) _dl_dprintf(_dl_debug_file, "\tsearching ldso dir='%s'\n", _dl_ldsopath);
-#endif
- if ((tpnt1 = search_for_named_library(libname, secure, _dl_ldsopath, rpnt)) != NULL)
- {
- return tpnt1;
- }
-
-
- /* Lastly, search the standard list of paths for the library.
- This list must exactly match the list in uClibc/ldso/util/ldd.c */
-#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) _dl_dprintf(_dl_debug_file, "\tsearching full lib path list\n");
-#endif
- if ((tpnt1 = search_for_named_library(libname, secure,
- UCLIBC_RUNTIME_PREFIX "usr/X11R6/lib:"
- UCLIBC_RUNTIME_PREFIX "usr/lib:"
- UCLIBC_RUNTIME_PREFIX "lib:"
- "/usr/lib:"
- "/lib", rpnt)
- ) != NULL)
- {
- return tpnt1;
- }
-
-goof:
- /* Well, we shot our wad on that one. All we can do now is punt */
- if (_dl_internal_error_number)
- _dl_error_number = _dl_internal_error_number;
- else
- _dl_error_number = LD_ERROR_NOFILE;
-#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) _dl_dprintf(2, "Bummer: could not find '%s'!\n", libname);
-#endif
- return NULL;
-}
-
-
-/*
- * Read one ELF library into memory, mmap it into the correct locations and
- * add the symbol info to the symbol chain. Perform any relocations that
- * are required.
- */
-
-struct elf_resolve *_dl_load_elf_shared_library(int secure,
- struct dyn_elf **rpnt, char *libname)
-{
- ElfW(Ehdr) *epnt;
- unsigned long dynamic_addr = 0;
- unsigned long dynamic_size = 0;
- Elf32_Dyn *dpnt;
- struct elf_resolve *tpnt;
- ElfW(Phdr) *ppnt;
- char *status, *header;
- unsigned long dynamic_info[24];
- unsigned long *lpnt;
- unsigned long libaddr;
- unsigned long minvma = 0xffffffff, maxvma = 0;
- int i, flags, piclib, infile;
-
- /* If this file is already loaded, skip this step */
- tpnt = _dl_check_hashed_files(libname);
- if (tpnt) {
- if (*rpnt) {
- (*rpnt)->next = (struct dyn_elf *) _dl_malloc(sizeof(struct dyn_elf));
- _dl_memset((*rpnt)->next, 0, sizeof(struct dyn_elf));
- (*rpnt)->next->prev = (*rpnt);
- *rpnt = (*rpnt)->next;
- (*rpnt)->dyn = tpnt;
- tpnt->symbol_scope = _dl_symbol_tables;
- }
- tpnt->usage_count++;
- tpnt->libtype = elf_lib;
-#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) _dl_dprintf(2, "file='%s'; already loaded\n", libname);
-#endif
- return tpnt;
- }
-
- /* If we are in secure mode (i.e. a setu/gid binary using LD_PRELOAD),
- we don't load the library if it isn't setuid. */
-
- if (secure) {
- struct stat st;
-
- if (_dl_stat(libname, &st) || !(st.st_mode & S_ISUID))
- return NULL;
- }
-
- libaddr = 0;
- infile = _dl_open(libname, O_RDONLY, 0);
- if (infile < 0) {
-#if 0
- /*
- * NO! When we open shared libraries we may search several paths.
- * it is inappropriate to generate an error here.
- */
- _dl_dprintf(2, "%s: can't open '%s'\n", _dl_progname, libname);
-#endif
- _dl_internal_error_number = LD_ERROR_NOFILE;
- return NULL;
- }
-
- header = _dl_mmap((void *) 0, PAGE_SIZE, PROT_READ | PROT_WRITE,
- MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
- if (_dl_mmap_check_error(header)) {
- _dl_dprintf(2, "%s: can't map '%s'\n", _dl_progname, libname);
- _dl_internal_error_number = LD_ERROR_MMAP_FAILED;
- _dl_close(infile);
- return NULL;
- };
-
- _dl_read(infile, header, PAGE_SIZE);
- epnt = (ElfW(Ehdr) *) (intptr_t) header;
- if (epnt->e_ident[0] != 0x7f ||
- epnt->e_ident[1] != 'E' ||
- epnt->e_ident[2] != 'L' ||
- epnt->e_ident[3] != 'F')
- {
- _dl_dprintf(2, "%s: '%s' is not an ELF file\n", _dl_progname,
- libname);
- _dl_internal_error_number = LD_ERROR_NOTELF;
- _dl_close(infile);
- _dl_munmap(header, PAGE_SIZE);
- return NULL;
- };
-
- if ((epnt->e_type != ET_DYN) || (epnt->e_machine != MAGIC1
-#ifdef MAGIC2
- && epnt->e_machine != MAGIC2
-#endif
- ))
- {
- _dl_internal_error_number =
- (epnt->e_type != ET_DYN ? LD_ERROR_NOTDYN : LD_ERROR_NOTMAGIC);
- _dl_dprintf(2, "%s: '%s' is not an ELF executable for " ELF_TARGET
- "\n", _dl_progname, libname);
- _dl_close(infile);
- _dl_munmap(header, PAGE_SIZE);
- return NULL;
- };
-
- ppnt = (ElfW(Phdr) *)(intptr_t) & header[epnt->e_phoff];
-
- piclib = 1;
- for (i = 0; i < epnt->e_phnum; i++) {
-
- if (ppnt->p_type == PT_DYNAMIC) {
- if (dynamic_addr)
- _dl_dprintf(2, "%s: '%s' has more than one dynamic section\n",
- _dl_progname, libname);
- dynamic_addr = ppnt->p_vaddr;
- dynamic_size = ppnt->p_filesz;
- };
-
- if (ppnt->p_type == PT_LOAD) {
- /* See if this is a PIC library. */
- if (i == 0 && ppnt->p_vaddr > 0x1000000) {
- piclib = 0;
- minvma = ppnt->p_vaddr;
- }
- if (piclib && ppnt->p_vaddr < minvma) {
- minvma = ppnt->p_vaddr;
- }
- if (((unsigned long) ppnt->p_vaddr + ppnt->p_memsz) > maxvma) {
- maxvma = ppnt->p_vaddr + ppnt->p_memsz;
- }
- }
- ppnt++;
- };
-
- maxvma = (maxvma + ADDR_ALIGN) & ~ADDR_ALIGN;
- minvma = minvma & ~0xffffU;
-
- flags = MAP_PRIVATE /*| MAP_DENYWRITE */ ;
- if (!piclib)
- flags |= MAP_FIXED;
-
- status = (char *) _dl_mmap((char *) (piclib ? 0 : minvma),
- maxvma - minvma, PROT_NONE, flags | MAP_ANONYMOUS, -1, 0);
- if (_dl_mmap_check_error(status)) {
- _dl_dprintf(2, "%s: can't map %s\n", _dl_progname, libname);
- _dl_internal_error_number = LD_ERROR_MMAP_FAILED;
- _dl_close(infile);
- _dl_munmap(header, PAGE_SIZE);
- return NULL;
- };
- libaddr = (unsigned long) status;
- flags |= MAP_FIXED;
-
- /* Get the memory to store the library */
- ppnt = (ElfW(Phdr) *)(intptr_t) & header[epnt->e_phoff];
-
- for (i = 0; i < epnt->e_phnum; i++) {
- if (ppnt->p_type == PT_LOAD) {
-
- /* See if this is a PIC library. */
- if (i == 0 && ppnt->p_vaddr > 0x1000000) {
- piclib = 0;
- /* flags |= MAP_FIXED; */
- }
-
-
-
- if (ppnt->p_flags & PF_W) {
- unsigned long map_size;
- char *cpnt;
-
- status = (char *) _dl_mmap((char *) ((piclib ? libaddr : 0) +
- (ppnt->p_vaddr & PAGE_ALIGN)), (ppnt->p_vaddr & ADDR_ALIGN)
- + ppnt->p_filesz, LXFLAGS(ppnt->p_flags), flags, infile,
- ppnt->p_offset & OFFS_ALIGN);
-
- if (_dl_mmap_check_error(status)) {
- _dl_dprintf(2, "%s: can't map '%s'\n",
- _dl_progname, libname);
- _dl_internal_error_number = LD_ERROR_MMAP_FAILED;
- _dl_munmap((char *) libaddr, maxvma - minvma);
- _dl_close(infile);
- _dl_munmap(header, PAGE_SIZE);
- return NULL;
- };
-
- /* Pad the last page with zeroes. */
- cpnt = (char *) (status + (ppnt->p_vaddr & ADDR_ALIGN) +
- ppnt->p_filesz);
- while (((unsigned long) cpnt) & ADDR_ALIGN)
- *cpnt++ = 0;
-
- /* I am not quite sure if this is completely
- * correct to do or not, but the basic way that
- * we handle bss segments is that we mmap
- * /dev/zero if there are any pages left over
- * that are not mapped as part of the file */
-
- map_size = (ppnt->p_vaddr + ppnt->p_filesz + ADDR_ALIGN) & PAGE_ALIGN;
-
- if (map_size < ppnt->p_vaddr + ppnt->p_memsz)
- status = (char *) _dl_mmap((char *) map_size +
- (piclib ? libaddr : 0),
- ppnt->p_vaddr + ppnt->p_memsz - map_size,
- LXFLAGS(ppnt->p_flags), flags | MAP_ANONYMOUS, -1, 0);
- } else
- status = (char *) _dl_mmap((char *) (ppnt->p_vaddr & PAGE_ALIGN)
- + (piclib ? libaddr : 0), (ppnt->p_vaddr & ADDR_ALIGN) +
- ppnt->p_filesz, LXFLAGS(ppnt->p_flags), flags,
- infile, ppnt->p_offset & OFFS_ALIGN);
- if (_dl_mmap_check_error(status)) {
- _dl_dprintf(2, "%s: can't map '%s'\n", _dl_progname, libname);
- _dl_internal_error_number = LD_ERROR_MMAP_FAILED;
- _dl_munmap((char *) libaddr, maxvma - minvma);
- _dl_close(infile);
- _dl_munmap(header, PAGE_SIZE);
- return NULL;
- };
-
- /* if(libaddr == 0 && piclib) {
- libaddr = (unsigned long) status;
- flags |= MAP_FIXED;
- }; */
- };
- ppnt++;
- };
- _dl_close(infile);
-
- /* For a non-PIC library, the addresses are all absolute */
- if (piclib) {
- dynamic_addr += (unsigned long) libaddr;
- }
-
- /*
- * OK, the ELF library is now loaded into VM in the correct locations
- * The next step is to go through and do the dynamic linking (if needed).
- */
-
- /* Start by scanning the dynamic section to get all of the pointers */
-
- if (!dynamic_addr) {
- _dl_internal_error_number = LD_ERROR_NODYNAMIC;
- _dl_dprintf(2, "%s: '%s' is missing a dynamic section\n",
- _dl_progname, libname);
- _dl_munmap(header, PAGE_SIZE);
- return NULL;
- }
-
- dpnt = (Elf32_Dyn *) dynamic_addr;
-
- dynamic_size = dynamic_size / sizeof(Elf32_Dyn);
- _dl_memset(dynamic_info, 0, sizeof(dynamic_info));
-
-#if defined(__mips__)
- {
-
- int indx = 1;
- Elf32_Dyn *dpnt = (Elf32_Dyn *) dynamic_addr;
-
- while(dpnt->d_tag) {
- dpnt++;
- indx++;
- }
- dynamic_size = indx;
- }
-#endif
-
- {
- unsigned long indx;
-
- for (indx = 0; indx < dynamic_size; indx++)
- {
- if (dpnt->d_tag > DT_JMPREL) {
- dpnt++;
- continue;
- }
- dynamic_info[dpnt->d_tag] = dpnt->d_un.d_val;
- if (dpnt->d_tag == DT_TEXTREL)
- dynamic_info[DT_TEXTREL] = 1;
- dpnt++;
- };
- }
-
- /* If the TEXTREL is set, this means that we need to make the pages
- writable before we perform relocations. Do this now. They get set
- back again later. */
-
- if (dynamic_info[DT_TEXTREL]) {
-#ifndef FORCE_SHAREABLE_TEXT_SEGMENTS
- ppnt = (ElfW(Phdr) *)(intptr_t) & header[epnt->e_phoff];
- for (i = 0; i < epnt->e_phnum; i++, ppnt++) {
- if (ppnt->p_type == PT_LOAD && !(ppnt->p_flags & PF_W))
- _dl_mprotect((void *) ((piclib ? libaddr : 0) +
- (ppnt->p_vaddr & PAGE_ALIGN)),
- (ppnt->p_vaddr & ADDR_ALIGN) + (unsigned long) ppnt->p_filesz,
- PROT_READ | PROT_WRITE | PROT_EXEC);
- }
-#else
- _dl_dprintf(_dl_debug_file, "Can't modify %s's text section. Use GCC option -fPIC for shared objects, please.\n",libname);
- _dl_exit(1);
-#endif
- }
-
- tpnt = _dl_add_elf_hash_table(libname, (char *) libaddr, dynamic_info,
- dynamic_addr, dynamic_size);
-
- tpnt->ppnt = (ElfW(Phdr) *)(intptr_t) (tpnt->loadaddr + epnt->e_phoff);
- tpnt->n_phent = epnt->e_phnum;
-
- /*
- * Add this object into the symbol chain
- */
- if (*rpnt) {
- (*rpnt)->next = (struct dyn_elf *) _dl_malloc(sizeof(struct dyn_elf));
- _dl_memset((*rpnt)->next, 0, sizeof(struct dyn_elf));
- (*rpnt)->next->prev = (*rpnt);
- *rpnt = (*rpnt)->next;
- (*rpnt)->dyn = tpnt;
- tpnt->symbol_scope = _dl_symbol_tables;
- }
- tpnt->usage_count++;
- tpnt->libtype = elf_lib;
-
- /*
- * OK, the next thing we need to do is to insert the dynamic linker into
- * the proper entry in the GOT so that the PLT symbols can be properly
- * resolved.
- */
-
- lpnt = (unsigned long *) dynamic_info[DT_PLTGOT];
-
- if (lpnt) {
- lpnt = (unsigned long *) (dynamic_info[DT_PLTGOT] +
- ((int) libaddr));
- INIT_GOT(lpnt, tpnt);
- };
-
-#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) {
- _dl_dprintf(2, "\n\tfile='%s'; generating link map\n", libname);
- _dl_dprintf(2, "\t\tdynamic: %x base: %x size: %x\n",
- dynamic_addr, libaddr, dynamic_size);
- _dl_dprintf(2, "\t\t entry: %x phdr: %x phnum: %d\n\n",
- epnt->e_entry + libaddr, tpnt->ppnt, tpnt->n_phent);
-
- }
-#endif
- _dl_munmap(header, PAGE_SIZE);
-
- return tpnt;
-}
-
-int _dl_fixup(struct dyn_elf *rpnt, int flag)
-{
- int goof = 0;
- struct elf_resolve *tpnt;
-
- if (rpnt->next)
- goof += _dl_fixup(rpnt->next, flag);
- tpnt = rpnt->dyn;
-
-#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) _dl_dprintf(_dl_debug_file,"\nrelocation processing: %s", tpnt->libname);
-#endif
-
- if (unlikely(tpnt->dynamic_info[UNSUPPORTED_RELOC_TYPE])) {
-#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) {
- _dl_dprintf(2, "%s: can't handle %s relocation records\n",
- _dl_progname, UNSUPPORTED_RELOC_STR);
- }
-#endif
- goof++;
- return goof;
- }
-
- if (tpnt->dynamic_info[DT_RELOC_TABLE_ADDR]) {
- if (tpnt->init_flag & RELOCS_DONE)
- return goof;
- tpnt->init_flag |= RELOCS_DONE;
- goof += _dl_parse_relocation_information(rpnt,
- tpnt->dynamic_info[DT_RELOC_TABLE_ADDR],
- tpnt->dynamic_info[DT_RELOC_TABLE_SIZE], 0);
- }
-
- if (tpnt->dynamic_info[DT_JMPREL]) {
- if (tpnt->init_flag & JMP_RELOCS_DONE)
- return goof;
- tpnt->init_flag |= JMP_RELOCS_DONE;
- if (flag & RTLD_LAZY) {
- _dl_parse_lazy_relocation_information(rpnt,
- tpnt->dynamic_info[DT_JMPREL],
- tpnt->dynamic_info [DT_PLTRELSZ], 0);
- } else {
- goof += _dl_parse_relocation_information(rpnt,
- tpnt->dynamic_info[DT_JMPREL],
- tpnt->dynamic_info[DT_PLTRELSZ], 0);
- }
- }
-
- if (tpnt->init_flag & COPY_RELOCS_DONE)
- return goof;
- tpnt->init_flag |= COPY_RELOCS_DONE;
- goof += _dl_parse_copy_information(rpnt,
- tpnt->dynamic_info[DT_RELOC_TABLE_ADDR],
- tpnt->dynamic_info[DT_RELOC_TABLE_SIZE], 0);
-
-#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) {
- _dl_dprintf(_dl_debug_file,"\nrelocation processing: %s", tpnt->libname);
- _dl_dprintf(_dl_debug_file,"; finished\n\n");
- }
-#endif
-
- return goof;
-}
-
-/* Minimal printf which handles only %s, %d, and %x */
-void _dl_dprintf(int fd, const char *fmt, ...)
-{
- int num;
- va_list args;
- char *start, *ptr, *string;
- static char *buf;
-
- buf = _dl_mmap((void *) 0, PAGE_SIZE, PROT_READ | PROT_WRITE,
- MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
- if (_dl_mmap_check_error(buf)) {
- _dl_write(fd, "mmap of a spare page failed!\n", 29);
- _dl_exit(20);
- }
-
- start = ptr = buf;
-
- if (!fmt)
- return;
-
- if (_dl_strlen(fmt) >= (PAGE_SIZE - 1)) {
- _dl_write(fd, "overflow\n", 11);
- _dl_exit(20);
- }
-
- _dl_strcpy(buf, fmt);
- va_start(args, fmt);
-
- while (start) {
- while (*ptr != '%' && *ptr) {
- ptr++;
- }
-
- if (*ptr == '%') {
- *ptr++ = '\0';
- _dl_write(fd, start, _dl_strlen(start));
-
- switch (*ptr++) {
- case 's':
- string = va_arg(args, char *);
-
- if (!string)
- _dl_write(fd, "(null)", 6);
- else
- _dl_write(fd, string, _dl_strlen(string));
- break;
-
- case 'i':
- case 'd':
- {
- char tmp[22];
- num = va_arg(args, int);
-
- string = _dl_simple_ltoa(tmp, num);
- _dl_write(fd, string, _dl_strlen(string));
- break;
- }
- case 'x':
- case 'X':
- {
- char tmp[22];
- num = va_arg(args, int);
-
- string = _dl_simple_ltoahex(tmp, num);
- _dl_write(fd, string, _dl_strlen(string));
- break;
- }
- default:
- _dl_write(fd, "(null)", 6);
- break;
- }
-
- start = ptr;
- } else {
- _dl_write(fd, start, _dl_strlen(start));
- start = NULL;
- }
- }
- _dl_munmap(buf, PAGE_SIZE);
- return;
-}
-
-char *_dl_strdup(const char *string)
-{
- char *retval;
- int len;
-
- len = _dl_strlen(string);
- retval = _dl_malloc(len + 1);
- _dl_strcpy(retval, string);
- return retval;
-}
-
-void *(*_dl_malloc_function) (size_t size) = NULL;
-void *_dl_malloc(int size)
-{
- void *retval;
-
-#if 0
-#ifdef __SUPPORT_LD_DEBUG_EARLY__
- _dl_dprintf(2, "malloc: request for %d bytes\n", size);
-#endif
-#endif
-
- if (_dl_malloc_function)
- return (*_dl_malloc_function) (size);
-
- if (_dl_malloc_addr - _dl_mmap_zero + size > PAGE_SIZE) {
-#ifdef __SUPPORT_LD_DEBUG_EARLY__
- _dl_dprintf(2, "malloc: mmapping more memory\n");
-#endif
- _dl_mmap_zero = _dl_malloc_addr = _dl_mmap((void *) 0, size,
- PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
- if (_dl_mmap_check_error(_dl_mmap_zero)) {
- _dl_dprintf(2, "%s: mmap of a spare page failed!\n", _dl_progname);
- _dl_exit(20);
- }
- }
- retval = _dl_malloc_addr;
- _dl_malloc_addr += size;
-
- /*
- * Align memory to 4 byte boundary. Some platforms require this, others
- * simply get better performance.
- */
- _dl_malloc_addr = (unsigned char *) (((unsigned long) _dl_malloc_addr + 3) & ~(3));
- return retval;
-}
-
-
-