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/* $XFree86: xc/programs/Xserver/hw/xfree86/loader/loader.c,v 1.71 2003/11/06 18:38:13 tsi Exp $ */
/*
* Copyright 1995-1998 by Metro Link, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, 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 name of Metro Link, Inc. not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Metro Link, Inc. makes no
* representations about the suitability of this software for any purpose.
* It is provided "as is" without express or implied warranty.
*
* METRO LINK, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL METRO LINK, INC. 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.
*/
/*
* Copyright (c) 1997-2003 by The XFree86 Project, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name of the copyright holder(s)
* and author(s) shall not be used in advertising or otherwise to promote
* the sale, use or other dealings in this Software without prior written
* authorization from the copyright holder(s) and author(s).
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#if defined(UseMMAP) || (defined(linux) && defined(__ia64__))
#include <sys/mman.h>
#endif
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#if defined(linux) && \
(defined(__alpha__) || defined(__powerpc__) || defined(__ia64__) \
|| defined(__amd64__))
#include <malloc.h>
#endif
#include <stdarg.h>
#include "ar.h"
#include "elf.h"
#include "coff.h"
#include "os.h"
#include "sym.h"
#include "loader.h"
#include "loaderProcs.h"
#include "xf86.h"
#include "xf86Priv.h"
#include "compiler.h"
extern LOOKUP miLookupTab[];
extern LOOKUP xfree86LookupTab[];
extern LOOKUP dixLookupTab[];
extern LOOKUP fontLookupTab[];
extern LOOKUP extLookupTab[];
/*
#define DEBUG
#define DEBUGAR
#define DEBUGLIST
#define DEBUGMEM
*/
int check_unresolved_sema = 0;
#if defined(Lynx) && defined(sun)
/* Cross build machine doesn;t have strerror() */
#define strerror(err) "strerror unsupported"
#endif
#ifdef __UNIXOS2__
void *os2ldcalloc(size_t, size_t);
#endif
#ifdef HANDLE_IN_HASH_ENTRY
/*
* handles are used to identify files that are loaded. Even archives
* are counted as a single file.
*/
#define MAX_HANDLE 256
#define HANDLE_FREE 0
#define HANDLE_USED 1
static char freeHandles[MAX_HANDLE];
static int refCount[MAX_HANDLE];
#endif
#if defined(__sparc__) && defined(__GNUC__) && !defined(__FreeBSD__)
# define SYMFUNCDOT(func) { "." #func, (funcptr)&__sparc_dot_ ## func },
# if !defined(__OpenBSD__)
# define SYMFUNCDOT89(func) { "." #func, (funcptr)&func ## _sparcv89 },
# define DEFFUNCDOT(func) \
extern void __sparc_dot_ ## func (void) __asm__ ("." #func); \
extern void func ## _sparcv89 (void);
# else
# define SYMFUNCDOT(func) { "." #func, (funcptr)&__sparc_dot_ ## func },
# define DEFFUNCDOT(func) \
extern void __sparc_dot_ ## func (void) __asm__ ("." #func);
#endif
DEFFUNCDOT(rem)
DEFFUNCDOT(urem)
DEFFUNCDOT(mul)
DEFFUNCDOT(umul)
DEFFUNCDOT(div)
DEFFUNCDOT(udiv)
#ifdef linux
static LOOKUP SparcV89LookupTab[] = {
SYMFUNCDOT89(rem)
SYMFUNCDOT89(urem)
SYMFUNCDOT89(mul)
SYMFUNCDOT89(umul)
SYMFUNCDOT89(div)
SYMFUNCDOT89(udiv)
{0, 0}
};
#endif
static LOOKUP SparcLookupTab[] = {
SYMFUNCDOT(rem)
SYMFUNCDOT(urem)
SYMFUNCDOT(mul)
SYMFUNCDOT(umul)
SYMFUNCDOT(div)
SYMFUNCDOT(udiv)
{0, 0}
};
#ifdef linux
#if defined(__GNUC__) && defined(__GLIBC__)
#define HWCAP_SPARC_MULDIV 8
extern unsigned long int _dl_hwcap;
#endif
static int
sparcUseHWMulDiv(void)
{
FILE *f;
char buffer[1024];
char *p;
#if defined(__GNUC__) && defined(__GLIBC__)
unsigned long *hwcap;
__asm(".weak _dl_hwcap");
hwcap = &_dl_hwcap;
__asm("": "=r"(hwcap):"0"(hwcap));
if (hwcap) {
if (*hwcap & HWCAP_SPARC_MULDIV)
return 1;
else
return 0;
}
#endif
f = fopen("/proc/cpuinfo", "r");
if (!f)
return 0;
while (fgets(buffer, 1024, f) != NULL) {
if (!strncmp(buffer, "type", 4)) {
p = strstr(buffer, "sun4");
if (p && (p[4] == 'u' || p[4] == 'd' || p[4] == 'm')) {
fclose(f);
return 1;
}
}
}
fclose(f);
return 0;
}
#endif
#endif
/*
* modules are used to identify compilation units (ie object modules).
* Archives contain multiple modules, each of which is treated seperately.
*/
static int moduleseq = 0;
/*
* GDB Interface
* =============
*
* Linked list of loaded modules - gdb will traverse this to determine
* whether it needs to add the symbols for the loaded module.
*/
LDRModulePtr ModList = 0;
/* Flag which gdb sets to let us know we're being debugged */
char DebuggerPresent = 0;
/* List of common symbols */
LDRCommonPtr ldrCommons;
int nCommons;
typedef struct {
int num;
const char **list;
} symlist;
/*
* List of symbols that may be referenced, and which are allowed to be
* unresolved providing that they don't appear on the "reqired" list.
*/
static symlist refList = { 0, NULL };
/* List of symbols that must not be unresolved */
static symlist reqList = { 0, NULL };
static int fatalReqSym = 0;
/* Prototypes for static functions. */
static int _GetModuleType(int, long);
static loaderPtr _LoaderListPush(void);
static loaderPtr _LoaderListPop(int);
/*ARGSUSED*/ static void
ARCHIVEResolveSymbols(void *unused)
{
}
/*ARGSUSED*/ static int
ARCHIVECheckForUnresolved(void *v)
{
return 0;
}
/*ARGSUSED*/ static char *
ARCHIVEAddressToSection(void *modptr, unsigned long address)
{
return NULL;
}
/*ARGSUSED*/ static void
ARCHIVEUnload(void *unused2)
{
}
/*
* Array containing entry points for different formats.
*/
static loader_funcs funcs[] = {
/* LD_ARCHIVE */
{ARCHIVELoadModule,
ARCHIVEResolveSymbols,
ARCHIVECheckForUnresolved,
ARCHIVEAddressToSection,
ARCHIVEUnload, {0, 0, 0, 0, 0}},
/* LD_ELFOBJECT */
{ELFLoadModule,
ELFResolveSymbols,
ELFCheckForUnresolved,
ELFAddressToSection,
ELFUnloadModule, {0, 0, 0, 0, 0}},
/* LD_COFFOBJECT */
{COFFLoadModule,
COFFResolveSymbols,
COFFCheckForUnresolved,
COFFAddressToSection,
COFFUnloadModule, {0, 0, 0, 0, 0}},
/* LD_XCOFFOBJECT */
{COFFLoadModule,
COFFResolveSymbols,
COFFCheckForUnresolved,
COFFAddressToSection,
COFFUnloadModule, {0, 0, 0, 0, 0}},
/* LD_AOUTOBJECT */
{AOUTLoadModule,
AOUTResolveSymbols,
AOUTCheckForUnresolved,
AOUTAddressToSection,
AOUTUnloadModule, {0, 0, 0, 0, 0}},
/* LD_AOUTDLOBJECT */
#ifdef DLOPEN_SUPPORT
{DLLoadModule,
DLResolveSymbols,
DLCheckForUnresolved,
ARCHIVEAddressToSection,
DLUnloadModule, {0, 0, 0, 0, 0}},
#else
{AOUTLoadModule,
AOUTResolveSymbols,
AOUTCheckForUnresolved,
AOUTAddressToSection,
AOUTUnloadModule, {0, 0, 0, 0, 0}},
#endif
/* LD_ELFDLOBJECT */
#ifdef DLOPEN_SUPPORT
{DLLoadModule,
DLResolveSymbols,
DLCheckForUnresolved,
ARCHIVEAddressToSection,
DLUnloadModule, {0, 0, 0, 0, 0}},
#else
{ELFLoadModule,
ELFResolveSymbols,
ELFCheckForUnresolved,
ELFAddressToSection,
ELFUnloadModule, {0, 0, 0, 0, 0}},
#endif
};
int numloaders = sizeof(funcs) / sizeof(loader_funcs);
void
LoaderInit(void)
{
const char *osname = NULL;
LoaderAddSymbols(-1, -1, miLookupTab);
LoaderAddSymbols(-1, -1, xfree86LookupTab);
LoaderAddSymbols(-1, -1, dixLookupTab);
LoaderAddSymbols(-1, -1, fontLookupTab);
LoaderAddSymbols(-1, -1, extLookupTab);
#if defined(__sparc__) && !defined(__FreeBSD__)
#ifdef linux
if (sparcUseHWMulDiv())
LoaderAddSymbols(-1, -1, SparcV89LookupTab);
else
#endif
LoaderAddSymbols(-1, -1, SparcLookupTab);
#endif
xf86MsgVerb(X_INFO, 2, "Module ABI versions:\n");
xf86ErrorFVerb(2, "\t%s: %d.%d\n", ABI_CLASS_ANSIC,
GET_ABI_MAJOR(LoaderVersionInfo.ansicVersion),
GET_ABI_MINOR(LoaderVersionInfo.ansicVersion));
xf86ErrorFVerb(2, "\t%s: %d.%d\n", ABI_CLASS_VIDEODRV,
GET_ABI_MAJOR(LoaderVersionInfo.videodrvVersion),
GET_ABI_MINOR(LoaderVersionInfo.videodrvVersion));
xf86ErrorFVerb(2, "\t%s : %d.%d\n", ABI_CLASS_XINPUT,
GET_ABI_MAJOR(LoaderVersionInfo.xinputVersion),
GET_ABI_MINOR(LoaderVersionInfo.xinputVersion));
xf86ErrorFVerb(2, "\t%s : %d.%d\n", ABI_CLASS_EXTENSION,
GET_ABI_MAJOR(LoaderVersionInfo.extensionVersion),
GET_ABI_MINOR(LoaderVersionInfo.extensionVersion));
xf86ErrorFVerb(2, "\t%s : %d.%d\n", ABI_CLASS_FONT,
GET_ABI_MAJOR(LoaderVersionInfo.fontVersion),
GET_ABI_MINOR(LoaderVersionInfo.fontVersion));
LoaderGetOS(&osname, NULL, NULL, NULL);
if (osname)
xf86MsgVerb(X_INFO, 2, "Loader running on %s\n", osname);
#if defined(linux) && \
(defined(__alpha__) || defined(__powerpc__) || defined(__ia64__) \
|| ( defined __amd64__ && ! defined UseMMAP && ! defined DoMMAPedMerge))
/*
* The glibc malloc uses mmap for large allocations anyway. This breaks
* some relocation types because the offset overflow. See loader.h for more
* details. We need to turn off this behavior here.
*/
mallopt(M_MMAP_MAX, 0);
#endif
}
/*
* Determine what type of object is being loaded.
* This function is responsible for restoring the offset.
* The fd and offset are used here so that when Archive processing
* is enabled, individual elements of an archive can be evaluated
* so the correct loader_funcs can be determined.
*/
static int
_GetModuleType(int fd, long offset)
{
unsigned char buf[256]; /* long enough for the largest magic type */
if (read(fd, buf, sizeof(buf)) < 0) {
return -1;
}
#ifdef DEBUG
ErrorF("Checking module type %10s\n", buf);
ErrorF("Checking module type %x %x %x %x\n", buf[0], buf[1], buf[2],
buf[3]);
#endif
lseek(fd, offset, SEEK_SET);
if (strncmp((char *)buf, ARMAG, SARMAG) == 0) {
return LD_ARCHIVE;
}
#if defined(AIAMAG)
/* LynxOS PPC style archives */
if (strncmp((char *)buf, AIAMAG, SAIAMAG) == 0) {
return LD_ARCHIVE;
}
#endif
if (strncmp((char *)buf, ELFMAG, SELFMAG) == 0) {
if (*((Elf32_Half *) (buf + ELFDLOFF)) == ELFDLMAG) {
return LD_ELFDLOBJECT;
} else {
return LD_ELFOBJECT;
}
}
if (buf[0] == 0x4c && buf[1] == 0x01) {
/* I386MAGIC */
return LD_COFFOBJECT;
}
if (buf[0] == 0x01 && buf[1] == 0xdf) {
/* XCOFFMAGIC */
return LD_COFFOBJECT;
}
if (buf[0] == 0x0d && buf[1] == 0x01) {
/* ZCOFFMAGIC (LynxOS) */
return LD_COFFOBJECT;
}
if (buf[0] == 0x00 && buf[1] == 0x86 && buf[2] == 0x01 && buf[3] == 0x07) {
/* AOUTMAGIC */
return LD_AOUTOBJECT;
}
if (buf[0] == 0x07 && buf[1] == 0x01
&& (buf[2] == 0x64 || buf[2] == 0x86)) {
/* AOUTMAGIC, (Linux OMAGIC, old impure format, also used by OS/2 */
return LD_AOUTOBJECT;
}
if (buf[0] == 0x07 && buf[1] == 0x01 && buf[2] == 0x00 && buf[3] == 0x00) {
/* AOUTMAGIC, BSDI */
return LD_AOUTOBJECT;
}
if ((buf[0] == 0xc0 && buf[1] == 0x86) || /* big endian form */
(buf[3] == 0xc0 && buf[2] == 0x86)) { /* little endian form */
/* i386 shared object */
return LD_AOUTDLOBJECT;
}
return LD_UNKNOWN;
}
static int offsetbias = 0; /* offset into archive */
/*
* _LoaderFileToMem() loads the contents of a file into memory using
* the most efficient method for a platform.
*/
void *
_LoaderFileToMem(int fd, unsigned long offset, int size, char *label)
{
#ifdef UseMMAP
unsigned long ret;
# ifdef MmapPageAlign
unsigned long pagesize;
unsigned long new_size;
unsigned long new_off;
unsigned long new_off_bias;
# endif
# define MMAP_PROT (PROT_READ|PROT_WRITE|PROT_EXEC)
# ifdef DEBUGMEM
ErrorF("_LoaderFileToMem(%d,%u(%u),%d,%s)", fd, offset, offsetbias, size,
label);
# endif
# ifdef MmapPageAlign
pagesize = getpagesize();
new_size = (size + pagesize - 1) / pagesize;
new_size *= pagesize;
new_off = (offset + offsetbias) / pagesize;
new_off *= pagesize;
new_off_bias = (offset + offsetbias) - new_off;
if ((new_off_bias + size) > new_size)
new_size += pagesize;
ret = (unsigned long)mmap(0, new_size, MMAP_PROT, MAP_PRIVATE
# ifdef __amd64__
| MAP_32BIT
# endif
, fd, new_off);
if (ret == -1)
FatalError("mmap() failed: %s\n", strerror(errno));
return (void *)(ret + new_off_bias);
# else
ret = (unsigned long)mmap(0, size, MMAP_PROT, MAP_PRIVATE
# ifdef __amd64__
| MAP_32BIT
# endif
, fd, offset + offsetbias);
if (ret == -1)
FatalError("mmap() failed: %s\n", strerror(errno));
return (void *)ret;
# endif
#else
char *ptr;
# ifdef DEBUGMEM
ErrorF("_LoaderFileToMem(%d,%u(%u),%d,%s)", fd, offset, offsetbias, size,
label);
# endif
if (size == 0) {
# ifdef DEBUGMEM
ErrorF("=NULL\n", ptr);
# endif
return NULL;
}
# ifndef __UNIXOS2__
if ((ptr = xf86loadercalloc(size, 1)) == NULL)
FatalError("_LoaderFileToMem() malloc failed\n");
# else
if ((ptr = os2ldcalloc(size, 1)) == NULL)
FatalError("_LoaderFileToMem() malloc failed\n");
# endif
# if defined(linux) && defined(__ia64__)
{
unsigned long page_size = getpagesize();
unsigned long round;
round = (unsigned long)ptr & (page_size - 1);
mprotect(ptr - round,
(size + round + page_size - 1) & ~(page_size - 1),
PROT_READ | PROT_WRITE | PROT_EXEC);
}
# endif
if (lseek(fd, offset + offsetbias, SEEK_SET) < 0)
FatalError("\n_LoaderFileToMem() lseek() failed: %s\n",
strerror(errno));
if (read(fd, ptr, size) != size)
FatalError("\n_LoaderFileToMem() read() failed: %s\n",
strerror(errno));
# if (defined(linux) || defined(__NetBSD__) || defined(__OpenBSD__)) \
&& defined(__powerpc__)
/*
* Keep the instruction cache in sync with changes in the
* main memory.
*/
{
int i;
for (i = 0; i < size; i += 16)
ppc_flush_icache(ptr + i);
ppc_flush_icache(ptr + size - 1);
}
# endif
# ifdef DEBUGMEM
ErrorF("=%lx\n", ptr);
# endif
return (void *)ptr;
#endif
}
/*
* _LoaderFreeFileMem() free the memory in which a file was loaded.
*/
void
_LoaderFreeFileMem(void *addr, int size)
{
#if defined (UseMMAP) && defined (MmapPageAlign)
unsigned long pagesize = getpagesize();
memType i_addr = (memType) addr;
unsigned long new_size;
#endif
#ifdef DEBUGMEM
ErrorF("_LoaderFreeFileMem(%x,%d)\n", addr, size);
#endif
#ifdef UseMMAP
# if defined (MmapPageAlign)
i_addr /= pagesize;
i_addr *= pagesize;
new_size = (size + pagesize - 1) / pagesize;
new_size *= pagesize;
if (((memType) addr - i_addr + size) > new_size)
new_size += pagesize;
munmap((void *)i_addr, new_size);
# else
munmap((void *)addr, size);
# endif
#else
if (size == 0)
return;
xf86loaderfree(addr);
#endif
return;
}
int
_LoaderFileRead(int fd, unsigned int offset, void *buf, int size)
{
if (lseek(fd, offset + offsetbias, SEEK_SET) < 0)
FatalError("_LoaderFileRead() lseek() failed: %s\n", strerror(errno));
if (read(fd, buf, size) != size)
FatalError("_LoaderFileRead() read() failed: %s\n", strerror(errno));
return size;
}
static loaderPtr listHead = (loaderPtr) 0;
static loaderPtr
_LoaderListPush()
{
loaderPtr item = xf86loadercalloc(1, sizeof(struct _loader));
item->next = listHead;
listHead = item;
return item;
}
static loaderPtr
_LoaderListPop(int handle)
{
loaderPtr item = listHead;
loaderPtr *bptr = &listHead; /* pointer to previous node */
while (item) {
if (item->handle == handle) {
*bptr = item->next; /* remove this from the list */
return item;
}
bptr = &(item->next);
item = item->next;
}
return 0;
}
/*
* _LoaderHandleToName() will return the name of the first module with a
* given handle. This requires getting the last module on the LIFO with
* the given handle.
*/
char *
_LoaderHandleToName(int handle)
{
loaderPtr item = listHead;
loaderPtr aritem = NULL;
loaderPtr lastitem = NULL;
if (handle < 0) {
return "(built-in)";
}
while (item) {
if (item->handle == handle) {
if (strchr(item->name, ':') == NULL)
aritem = item;
else
lastitem = item;
}
item = item->next;
}
if (aritem)
return aritem->name;
if (lastitem)
return lastitem->name;
return 0;
}
/*
* _LoaderHandleToCanonicalName() will return the cname of the first module
* with a given handle. This requires getting the last module on the LIFO with
* the given handle.
*/
char *
_LoaderHandleToCanonicalName(int handle)
{
loaderPtr item = listHead;
loaderPtr lastitem = NULL;
if (handle < 0) {
return "(built-in)";
}
while (item) {
if (item->handle == handle) {
lastitem = item;
}
item = item->next;
}
if (lastitem)
return lastitem->cname;
return NULL;
}
/*
* _LoaderModuleToName() will return the name of the first module with a
* given handle. This requires getting the last module on the LIFO with
* the given handle.
*/
char *
_LoaderModuleToName(int module)
{
loaderPtr item = listHead;
loaderPtr aritem = NULL;
loaderPtr lastitem = NULL;
if (module < 0) {
return "(built-in)";
}
while (item) {
if (item->module == module) {
if (strchr(item->name, ':') == NULL)
aritem = item;
else
lastitem = item;
}
item = item->next;
}
if (aritem)
return aritem->name;
if (lastitem)
return lastitem->name;
return 0;
}
/*
* _LoaderAddressToSection() will return the name of the file & section
* that contains the given address.
*/
int
_LoaderAddressToSection(const unsigned long address, const char **module,
const char **section)
{
loaderPtr item = listHead;
while (item) {
if ((*section =
item->funcs->AddressToSection(item->private, address)) != NULL) {
*module = _LoaderModuleToName(item->module);
return 1;
}
item = item->next;
}
return 0;
}
/*
* Add a list of symbols to the referenced list.
*/
static void
AppendSymbol(symlist * list, const char *sym)
{
list->list = xnfrealloc(list->list, (list->num + 1) * sizeof(char **));
list->list[list->num] = sym;
list->num++;
}
static void
AppendSymList(symlist * list, const char **syms)
{
while (*syms) {
AppendSymbol(list, *syms);
syms++;
}
}
static int
SymInList(symlist * list, char *sym)
{
int i;
for (i = 0; i < list->num; i++)
if (strcmp(list->list[i], sym) == 0)
return 1;
return 0;
}
void
LoaderVRefSymbols(const char *sym0, va_list args)
{
const char *s;
if (sym0 == NULL)
return;
s = sym0;
do {
AppendSymbol(&refList, s);
s = va_arg(args, const char *);
} while (s != NULL);
}
void
LoaderRefSymbols(const char *sym0, ...)
{
va_list ap;
va_start(ap, sym0);
LoaderVRefSymbols(sym0, ap);
va_end(ap);
}
void
LoaderVRefSymLists(const char **list0, va_list args)
{
const char **l;
if (list0 == NULL)
return;
l = list0;
do {
AppendSymList(&refList, l);
l = va_arg(args, const char **);
} while (l != NULL);
}
void
LoaderRefSymLists(const char **list0, ...)
{
va_list ap;
va_start(ap, list0);
LoaderVRefSymLists(list0, ap);
va_end(ap);
}
void
LoaderVReqSymLists(const char **list0, va_list args)
{
const char **l;
if (list0 == NULL)
return;
l = list0;
do {
AppendSymList(&reqList, l);
l = va_arg(args, const char **);
} while (l != NULL);
}
void
LoaderReqSymLists(const char **list0, ...)
{
va_list ap;
va_start(ap, list0);
LoaderVReqSymLists(list0, ap);
va_end(ap);
}
void
LoaderVReqSymbols(const char *sym0, va_list args)
{
const char *s;
if (sym0 == NULL)
return;
s = sym0;
do {
AppendSymbol(&reqList, s);
s = va_arg(args, const char *);
} while (s != NULL);
}
void
LoaderReqSymbols(const char *sym0, ...)
{
va_list ap;
va_start(ap, sym0);
LoaderVReqSymbols(sym0, ap);
va_end(ap);
}
/*
* _LoaderHandleUnresolved() decides what to do with an unresolved
* symbol. Symbols that are not on the "referenced" or "required" lists
* get a warning if they are unresolved. Symbols that are on the "required"
* list generate a fatal error if they are unresolved.
*/
int
_LoaderHandleUnresolved(char *symbol, char *module)
{
int fatalsym = 0;
if (xf86ShowUnresolved && !fatalsym) {
if (SymInList(&reqList, symbol)) {
fatalReqSym = 1;
ErrorF("Required symbol %s from module %s is unresolved!\n",
symbol, module);
}
if (!SymInList(&refList, symbol)) {
ErrorF("Symbol %s from module %s is unresolved!\n",
symbol, module);
}
}
return (fatalsym);
}
/*
* Handle an archive.
*/
void *
ARCHIVELoadModule(loaderPtr modrec, int arfd, LOOKUP ** ppLookup)
{
loaderPtr tmp = NULL;
void *ret = NULL;
unsigned char magic[SARMAG];
struct ar_hdr hdr;
#if defined(__powerpc__) && defined(Lynx)
struct fl_hdr fhdr;
char name[255];
int namlen;
#endif
unsigned int size;
unsigned int offset;
int arnamesize, modnamesize;
char *slash, *longname;
char *nametable = NULL;
int nametablelen = 0;
LOOKUP *lookup_ret, *p;
LOOKUP *myLookup = NULL; /* Does realloc behave if ptr == 0? */
int modtype;
int i;
int numsyms = 0;
/* lookup_ret = xf86loadermalloc(sizeof (LOOKUP *)); */
arnamesize = strlen(modrec->name);
#if !(defined(__powerpc__) && defined(Lynx))
read(arfd, magic, SARMAG);
if (strncmp((const char *)magic, ARMAG, SARMAG) != 0) {
ErrorF("ARCHIVELoadModule: wrong magic!!\n");
return NULL;
}
#else
read(arfd, &fhdr, FL_HSZ);
if (strncmp(fhdr.fl_magic, AIAMAG, SAIAMAG) != 0) {
ErrorF("ARCHIVELoadModule: wrong magic!!\n");
return NULL;
}
#endif /* __powerpc__ && Lynx */
#ifdef DEBUGAR
ErrorF("Looking for archive members starting at offset %o\n", offset);
#endif
while (read(arfd, &hdr, sizeof(struct ar_hdr))) {
longname = NULL;
sscanf(hdr.ar_size, "%u", &size);
#if defined(__powerpc__) && defined(Lynx)
sscanf(hdr.ar_namlen, "%d", &namlen);
name[0] = hdr.ar_name[0];
name[1] = hdr.ar_name[1];
read(arfd, &name[2], namlen);
name[namlen] = '\0';
offset = lseek(arfd, 0, SEEK_CUR);
if (offset & 0x1) /* odd value */
offset = lseek(arfd, 1, SEEK_CUR); /* make it an even boundary */
#endif
offset = lseek(arfd, 0, SEEK_CUR);
/* Check for a Symbol Table */
if ((hdr.ar_name[0] == '/' && hdr.ar_name[1] == ' ') ||
#if defined(__powerpc__) && defined(Lynx)
namlen == 0 ||
#endif
strncmp(hdr.ar_name, "__.SYMDEF", 9) == 0) {
/* If the file name is NULL, then it is a symbol table */
#ifdef DEBUGAR
ErrorF("Symbol Table Member '%16.16s', size %d, offset %d\n",
hdr.ar_name, size, offset);
ErrorF("Symbol table size %d\n", size);
#endif
offset = lseek(arfd, offset + size, SEEK_SET);
if (offset & 0x1) /* odd value */
offset = lseek(arfd, 1, SEEK_CUR); /* make it an even boundary */
continue;
}
/* Check for a String Table */
if (hdr.ar_name[0] == '/' && hdr.ar_name[1] == '/') {
/* If the file name is '/', then it is a string table */
#ifdef DEBUGAR
ErrorF("String Table Member '%16.16s', size %d, offset %d\n",
hdr.ar_name, size, offset);
ErrorF("String table size %d\n", size);
#endif
nametablelen = size;
nametable = (char *)xf86loadermalloc(nametablelen);
read(arfd, nametable, size);
offset = lseek(arfd, 0, SEEK_CUR);
/* offset=lseek(arfd,offset+size,SEEK_SET); */
if (offset & 0x1) /* odd value */
offset = lseek(arfd, 1, SEEK_CUR); /* make it an even boundary */
continue;
}
if (hdr.ar_name[0] == '/') {
/* SYS V r4 style long member name */
int nameoffset = atol(&hdr.ar_name[1]);
char *membername;
if (!nametable) {
ErrorF("Missing string table whilst processing %s\n",
modrec->name);
offsetbias = 0;
return NULL;
}
if (nameoffset > nametablelen) {
ErrorF("Invalid string table offset (%s) whilst processing %s\n", hdr.ar_name, modrec->name);
offsetbias = 0;
xf86loaderfree(nametable);
return NULL;
}
membername = nametable + nameoffset;
slash = strchr(membername, '/');
if (slash)
*slash = '\0';
longname = xf86loadermalloc(arnamesize + strlen(membername) + 2);
strcpy(longname, modrec->name);
strcat(longname, ":");
strcat(longname, membername);
} else if (hdr.ar_name[0] == '#' && hdr.ar_name[1] == '1' &&
hdr.ar_name[2] == '/') {
/* BSD 4.4 style long member name */
if (sscanf(hdr.ar_name + 3, "%d", &modnamesize) != 1) {
ErrorF("Bad archive member %s\n", hdr.ar_name);
offsetbias = 0;
return NULL;
}
/* allocate space for fully qualified name */
longname = xf86loadermalloc(arnamesize + modnamesize + 2);
strcpy(longname, modrec->name);
strcat(longname, ":");
i = read(arfd, longname + modnamesize + 1, modnamesize);
if (i != modnamesize) {
ErrorF("Bad archive member %s\n", hdr.ar_name);
xf86loaderfree(longname);
offsetbias = 0;
return NULL;
}
longname[i] = '\0';
offset += i;
size -= i;
} else {
/* Regular archive member */
#ifdef DEBUGAR
ErrorF("Member '%16.16s', size %d, offset %x\n",
#if !(defined(__powerpc__) && defined(Lynx))
hdr.ar_name,
#else
name,
#endif
size, offset);
#endif
slash = strchr(hdr.ar_name, '/');
if (slash == NULL) {
/* BSD format without trailing slash */
slash = strchr(hdr.ar_name, ' ');
}
/* SM: Make sure we do not overwrite other parts of struct */
if ((slash - hdr.ar_name) > sizeof(hdr.ar_name))
slash = hdr.ar_name + sizeof(hdr.ar_name) - 1;
*slash = '\000';
}
if ((modtype = _GetModuleType(arfd, offset)) < 0) {
ErrorF("%s is an unrecognized module type\n", hdr.ar_name);
offsetbias = 0;
if (nametable)
xf86loaderfree(nametable);
return NULL;
}
tmp = _LoaderListPush();
tmp->handle = modrec->handle;
tmp->module = moduleseq++;
tmp->cname = xf86loadermalloc(strlen(modrec->cname) + 1);
strcpy(tmp->cname, modrec->cname);
tmp->funcs = &funcs[modtype];
if (longname == NULL) {
modnamesize = strlen(hdr.ar_name);
tmp->name =
(char *)xf86loadermalloc(arnamesize + modnamesize + 2);
strcpy(tmp->name, modrec->name);
strcat(tmp->name, ":");
strcat(tmp->name, hdr.ar_name);
} else {
tmp->name = longname;
}
offsetbias = offset;
if ((tmp->private = funcs[modtype].LoadModule(tmp, arfd, &lookup_ret))
== NULL) {
ErrorF("Failed to load %s\n", hdr.ar_name);
offsetbias = 0;
if (nametable)
xf86loaderfree(nametable);
return NULL;
}
offset = lseek(arfd, offset + size, SEEK_SET);
if (offset & 0x1) /* odd value */
lseek(arfd, 1, SEEK_CUR); /* make it an even boundary */
if (tmp->private == (void *)-1L) {
ErrorF("Skipping \"%s\": No symbols found\n", tmp->name);
continue;
} else
ret = tmp->private;
/* Add the lookup table returned from funcs.LoadModule to the
* one we're going to return.
*/
for (i = 0, p = lookup_ret; p && p->symName; i++, p++) ;
if (i) {
myLookup = xf86loaderrealloc(myLookup, (numsyms + i + 1)
* sizeof(LOOKUP));
if (!myLookup)
continue; /* Oh well! */
memcpy(&(myLookup[numsyms]), lookup_ret, i * sizeof(LOOKUP));
numsyms += i;
myLookup[numsyms].symName = 0;
}
xf86loaderfree(lookup_ret);
}
/* xf86loaderfree(lookup_ret); */
offsetbias = 0;
*ppLookup = myLookup;
if (nametable)
xf86loaderfree(nametable);
return ret;
}
/*
* Relocation list manipulation routines
*/
/*
* _LoaderGetRelocations() Return the list of outstanding relocations
*/
LoaderRelocPtr
_LoaderGetRelocations(void *mod)
{
loader_funcs *formatrec = (loader_funcs *) mod;
return &(formatrec->pRelocs);
}
/*
* Public Interface to the loader.
*/
int
LoaderOpen(const char *module, const char *cname, int handle,
int *errmaj, int *errmin, int *wasLoaded)
{
loaderPtr tmp;
int new_handle, modtype;
int fd;
LOOKUP *pLookup;
#if defined(DEBUG)
ErrorF("LoaderOpen(%s)\n", module);
#endif
/*
* Check to see if the module is already loaded.
* Only if we are loading it into an existing namespace.
* If it is to be loaded into a new namespace, don't check.
* Note: We only have one namespace.
*/
if (handle >= 0) {
tmp = listHead;
while (tmp) {
#ifdef DEBUGLIST
ErrorF("strcmp(%x(%s),{%x} %x(%s))\n", module, module,
&(tmp->name), tmp->name, tmp->name);
#endif
if (!strcmp(module, tmp->name)) {
refCount[tmp->handle]++;
if (wasLoaded)
*wasLoaded = 1;
xf86MsgVerb(X_INFO, 2, "Reloading %s\n", module);
return tmp->handle;
}
tmp = tmp->next;
}
}
/*
* OK, it's a new one. Add it.
*/
xf86Msg(X_INFO, "Loading %s\n", module);
if (wasLoaded)
*wasLoaded = 0;
/*
* Find a free handle.
*/
new_handle = 1;
while (freeHandles[new_handle] && new_handle < MAX_HANDLE)
new_handle++;
if (new_handle == MAX_HANDLE) {
xf86Msg(X_ERROR, "Out of loader space\n"); /* XXX */
if (errmaj)
*errmaj = LDR_NOSPACE;
if (errmin)
*errmin = LDR_NOSPACE;
return -1;
}
freeHandles[new_handle] = HANDLE_USED;
refCount[new_handle] = 1;
if ((fd = open(module, O_RDONLY)) < 0) {
xf86Msg(X_ERROR, "Unable to open %s\n", module);
freeHandles[new_handle] = HANDLE_FREE;
if (errmaj)
*errmaj = LDR_NOMODOPEN;
if (errmin)
*errmin = errno;
return -1;
}
if ((modtype = _GetModuleType(fd, 0)) < 0) {
xf86Msg(X_ERROR, "%s is an unrecognized module type\n", module);
freeHandles[new_handle] = HANDLE_FREE;
if (errmaj)
*errmaj = LDR_UNKTYPE;
if (errmin)
*errmin = LDR_UNKTYPE;
return -1;
}
tmp = _LoaderListPush();
tmp->name = xf86loadermalloc(strlen(module) + 1);
strcpy(tmp->name, module);
tmp->cname = xf86loadermalloc(strlen(cname) + 1);
strcpy(tmp->cname, cname);
tmp->handle = new_handle;
tmp->module = moduleseq++;
tmp->funcs = &funcs[modtype];
if ((tmp->private = funcs[modtype].LoadModule(tmp, fd, &pLookup)) == NULL) {
xf86Msg(X_ERROR, "Failed to load %s\n", module);
_LoaderListPop(new_handle);
freeHandles[new_handle] = HANDLE_FREE;
if (errmaj)
*errmaj = LDR_NOLOAD;
if (errmin)
*errmin = LDR_NOLOAD;
return -1;
}
if (tmp->private != (void *)-1L) {
LoaderAddSymbols(new_handle, tmp->module, pLookup);
xf86loaderfree(pLookup);
}
close(fd);
return new_handle;
}
int
LoaderHandleOpen(int handle)
{
if (handle < 0 || handle >= MAX_HANDLE)
return -1;
if (freeHandles[handle] != HANDLE_USED)
return -1;
refCount[handle]++;
return handle;
}
void *
LoaderSymbol(const char *sym)
{
int i;
itemPtr item = NULL;
for (i = 0; i < numloaders; i++)
funcs[i].ResolveSymbols(&funcs[i]);
item = (itemPtr) LoaderHashFind(sym);
if (item)
return item->address;
else
#ifdef DLOPEN_SUPPORT
return (DLFindSymbol(sym));
#else
return NULL;
#endif
}
int
LoaderResolveSymbols(void)
{
int i;
for (i = 0; i < numloaders; i++)
funcs[i].ResolveSymbols(&funcs[i]);
return 0;
}
int
LoaderCheckUnresolved(int delay_flag)
{
int i, ret = 0;
LoaderResolveOptions delayFlag = (LoaderResolveOptions)delay_flag;
LoaderResolveSymbols();
if (delayFlag == LD_RESOLV_NOW) {
if (check_unresolved_sema > 0)
check_unresolved_sema--;
else
xf86Msg(X_WARNING, "LoaderCheckUnresolved: not enough "
"MAGIC_DONT_CHECK_UNRESOLVED\n");
}
if (!check_unresolved_sema || delayFlag == LD_RESOLV_FORCE)
for (i = 0; i < numloaders; i++)
if (funcs[i].CheckForUnresolved(&funcs[i]))
ret = 1;
if (fatalReqSym)
FatalError("Some required symbols were unresolved\n");
return ret;
}
void xf86LoaderTrap(void);
void
xf86LoaderTrap(void)
{
}
void
LoaderDefaultFunc(void)
{
ErrorF("\n\n\tThis should not happen!\n"
"\tAn unresolved function was called!\n");
xf86LoaderTrap();
FatalError("\n");
}
int
LoaderUnload(int handle)
{
loaderRec fakeHead;
loaderPtr tmp = &fakeHead;
if (handle < 0 || handle > MAX_HANDLE)
return -1;
/*
* check the reference count, only free it if it goes to zero
*/
if (--refCount[handle])
return 0;
/*
* find the loaderRecs associated with this handle.
*/
while ((tmp = _LoaderListPop(handle)) != NULL) {
if (strchr(tmp->name, ':') == NULL) {
/* It is not a member of an archive */
xf86Msg(X_INFO, "Unloading %s\n", tmp->name);
}
tmp->funcs->LoaderUnload(tmp->private);
xf86loaderfree(tmp->name);
xf86loaderfree(tmp->cname);
xf86loaderfree(tmp);
}
freeHandles[handle] = HANDLE_FREE;
return 0;
}
void
LoaderDuplicateSymbol(const char *symbol, const int handle)
{
ErrorF("Duplicate symbol %s in %s\n", symbol,
listHead ? listHead->name : "(built-in)");
ErrorF("Also defined in %s\n", _LoaderHandleToName(handle));
FatalError("Module load failure\n");
}
/* GDB Sync function */
void
_loader_debug_state()
{
}
unsigned long LoaderOptions = 0;
void
LoaderResetOptions(void)
{
LoaderOptions = 0;
}
void
LoaderSetOptions(unsigned long opts)
{
LoaderOptions |= opts;
}
void
LoaderClearOptions(unsigned long opts)
{
LoaderOptions &= ~opts;
}
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