lists, a really bad hash table, the last vestiges of the other backends, and some miscellaneous cleanups. Good for dropping 300k from the size of the built server on x86.
754 lines
17 KiB
C
754 lines
17 KiB
C
/*
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* Copyright 1995-1998 by Metro Link, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Metro Link, Inc. not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Metro Link, Inc. makes no
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* representations about the suitability of this software for any purpose.
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* It is provided "as is" without express or implied warranty.
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*
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* METRO LINK, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL METRO LINK, INC. BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* Copyright (c) 1997-2003 by The XFree86 Project, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of the copyright holder(s)
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* and author(s) shall not be used in advertising or otherwise to promote
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* the sale, use or other dealings in this Software without prior written
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* authorization from the copyright holder(s) and author(s).
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#if defined(UseMMAP) || (defined(linux) && defined(__ia64__))
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#include <sys/mman.h>
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#endif
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#include <unistd.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <string.h>
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#if defined(linux) && \
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(defined(__alpha__) || defined(__powerpc__) || defined(__ia64__) \
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|| defined(__amd64__))
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#include <malloc.h>
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#endif
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#include <stdarg.h>
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#include "os.h"
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#include "loader.h"
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#include "loaderProcs.h"
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#include "xf86.h"
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#include "xf86Priv.h"
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#include "compiler.h"
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#if defined(Lynx) && defined(sun)
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/* Cross build machine doesn;t have strerror() */
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#define strerror(err) "strerror unsupported"
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#endif
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/*
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* handles are used to identify files that are loaded. Even archives
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* are counted as a single file.
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*/
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#define MAX_HANDLE 256
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#define HANDLE_FREE 0
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#define HANDLE_USED 1
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static char freeHandles[MAX_HANDLE];
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static int refCount[MAX_HANDLE];
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#if defined(__sparc__) && defined(__GNUC__) && !defined(__FreeBSD__)
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# define SYMFUNCDOT(func) { "." #func, (funcptr)&__sparc_dot_ ## func },
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# if !defined(__OpenBSD__)
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# define SYMFUNCDOT89(func) { "." #func, (funcptr)&func ## _sparcv89 },
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# define DEFFUNCDOT(func) \
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extern void __sparc_dot_ ## func (void) __asm__ ("." #func); \
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extern void func ## _sparcv89 (void);
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# else
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# define SYMFUNCDOT(func) { "." #func, (funcptr)&__sparc_dot_ ## func },
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# define DEFFUNCDOT(func) \
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extern void __sparc_dot_ ## func (void) __asm__ ("." #func);
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#endif
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DEFFUNCDOT(rem)
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DEFFUNCDOT(urem)
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DEFFUNCDOT(mul)
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DEFFUNCDOT(umul)
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DEFFUNCDOT(div)
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DEFFUNCDOT(udiv)
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#ifdef linux
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#if defined(__GNUC__) && defined(__GLIBC__)
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#define HWCAP_SPARC_MULDIV 8
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extern unsigned long int _dl_hwcap;
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#endif
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static int
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sparcUseHWMulDiv(void)
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{
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FILE *f;
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char buffer[1024];
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char *p;
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#if defined(__GNUC__) && defined(__GLIBC__)
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unsigned long *hwcap;
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__asm(".weak _dl_hwcap");
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hwcap = &_dl_hwcap;
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__asm("": "=r"(hwcap):"0"(hwcap));
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if (hwcap) {
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if (*hwcap & HWCAP_SPARC_MULDIV)
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return 1;
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else
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return 0;
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}
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#endif
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f = fopen("/proc/cpuinfo", "r");
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if (!f)
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return 0;
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while (fgets(buffer, 1024, f) != NULL) {
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if (!strncmp(buffer, "type", 4)) {
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p = strstr(buffer, "sun4");
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if (p && (p[4] == 'u' || p[4] == 'd')) {
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fclose(f);
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return 1;
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} else if (p && p[4] == 'm') {
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fclose(f);
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f = fopen("/proc/cpuinfo","r");
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if (!f) return 0;
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while (fgets(buffer, 1024, f) != NULL) {
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if (!strncmp (buffer, "MMU type", 8)) {
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p = strstr (buffer, "Cypress");
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if (p) {
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fclose(f);
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return 1;
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}
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}
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}
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fclose(f);
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return 0;
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}
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}
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}
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fclose(f);
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return 0;
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}
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#endif
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#endif
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/*
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* modules are used to identify compilation units (ie object modules).
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* Archives contain multiple modules, each of which is treated seperately.
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*/
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static int moduleseq = 0;
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typedef struct {
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int num;
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const char **list;
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} symlist;
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/*
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* List of symbols that may be referenced, and which are allowed to be
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* unresolved providing that they don't appear on the "reqired" list.
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*/
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static symlist refList = { 0, NULL };
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/* List of symbols that must not be unresolved */
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static symlist reqList = { 0, NULL };
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static int fatalReqSym = 0;
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/* Prototypes for static functions. */
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static loaderPtr _LoaderListPush(void);
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static loaderPtr _LoaderListPop(int);
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void
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LoaderInit(void)
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{
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const char *osname = NULL;
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char *ld_bind_now = getenv("LD_BIND_NOW");
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if (ld_bind_now && *ld_bind_now) {
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xf86Msg(X_ERROR, "LD_BIND_NOW is set, dlloader will NOT work!\n");
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}
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xf86MsgVerb(X_INFO, 2, "Module ABI versions:\n");
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xf86ErrorFVerb(2, "\t%s: %d.%d\n", ABI_CLASS_ANSIC,
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GET_ABI_MAJOR(LoaderVersionInfo.ansicVersion),
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GET_ABI_MINOR(LoaderVersionInfo.ansicVersion));
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xf86ErrorFVerb(2, "\t%s: %d.%d\n", ABI_CLASS_VIDEODRV,
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GET_ABI_MAJOR(LoaderVersionInfo.videodrvVersion),
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GET_ABI_MINOR(LoaderVersionInfo.videodrvVersion));
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xf86ErrorFVerb(2, "\t%s : %d.%d\n", ABI_CLASS_XINPUT,
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GET_ABI_MAJOR(LoaderVersionInfo.xinputVersion),
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GET_ABI_MINOR(LoaderVersionInfo.xinputVersion));
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xf86ErrorFVerb(2, "\t%s : %d.%d\n", ABI_CLASS_EXTENSION,
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GET_ABI_MAJOR(LoaderVersionInfo.extensionVersion),
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GET_ABI_MINOR(LoaderVersionInfo.extensionVersion));
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xf86ErrorFVerb(2, "\t%s : %d.%d\n", ABI_CLASS_FONT,
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GET_ABI_MAJOR(LoaderVersionInfo.fontVersion),
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GET_ABI_MINOR(LoaderVersionInfo.fontVersion));
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LoaderGetOS(&osname, NULL, NULL, NULL);
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if (osname)
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xf86MsgVerb(X_INFO, 2, "Loader running on %s\n", osname);
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#if defined(__UNIXWARE__) && !defined(__GNUC__)
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/* For UnixWare we need to load the C Runtime libraries which are
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* normally auto-linked by the compiler. Otherwise we are bound to
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* see unresolved symbols when trying to use the type "long long".
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* Obviously, this does not apply if the GNU C compiler is used.
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*/
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{
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int errmaj, errmin, wasLoaded; /* place holders */
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char *xcrtpath = DEFAULT_MODULE_PATH "/libcrt.a";
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char *uwcrtpath = "/usr/ccs/lib/libcrt.a";
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char *path;
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struct stat st;
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if(stat(xcrtpath, &st) < 0)
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path = uwcrtpath; /* fallback: try to get libcrt.a from the uccs */
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else
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path = xcrtpath; /* get the libcrt.a we compiled with */
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LoaderOpen (path, "libcrt", 0, &errmaj, &errmin, &wasLoaded);
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}
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#endif
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}
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static loaderPtr listHead = (loaderPtr) 0;
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static loaderPtr
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_LoaderListPush()
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{
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loaderPtr item = calloc(1, sizeof(struct _loader));
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item->next = listHead;
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listHead = item;
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return item;
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}
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static loaderPtr
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_LoaderListPop(int handle)
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{
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loaderPtr item = listHead;
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loaderPtr *bptr = &listHead; /* pointer to previous node */
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while (item) {
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if (item->handle == handle) {
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*bptr = item->next; /* remove this from the list */
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return item;
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}
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bptr = &(item->next);
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item = item->next;
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}
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return 0;
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}
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/*
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* _LoaderHandleToName() will return the name of the first module with a
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* given handle. This requires getting the last module on the LIFO with
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* the given handle.
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*/
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char *
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_LoaderHandleToName(int handle)
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{
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loaderPtr item = listHead;
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loaderPtr aritem = NULL;
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loaderPtr lastitem = NULL;
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if (handle < 0) {
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return "(built-in)";
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}
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while (item) {
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if (item->handle == handle) {
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if (strchr(item->name, ':') == NULL)
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aritem = item;
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else
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lastitem = item;
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}
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item = item->next;
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}
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if (aritem)
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return aritem->name;
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if (lastitem)
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return lastitem->name;
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return 0;
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}
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/*
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* _LoaderHandleToCanonicalName() will return the cname of the first module
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* with a given handle. This requires getting the last module on the LIFO with
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* the given handle.
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*/
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char *
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_LoaderHandleToCanonicalName(int handle)
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{
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loaderPtr item = listHead;
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loaderPtr lastitem = NULL;
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if (handle < 0) {
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return "(built-in)";
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}
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while (item) {
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if (item->handle == handle) {
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lastitem = item;
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}
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item = item->next;
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}
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if (lastitem)
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return lastitem->cname;
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return NULL;
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}
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/*
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* _LoaderModuleToName() will return the name of the first module with a
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* given handle. This requires getting the last module on the LIFO with
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* the given handle.
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*/
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char *
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_LoaderModuleToName(int module)
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{
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loaderPtr item = listHead;
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loaderPtr aritem = NULL;
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loaderPtr lastitem = NULL;
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if (module < 0) {
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return "(built-in)";
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}
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while (item) {
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if (item->module == module) {
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if (strchr(item->name, ':') == NULL)
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aritem = item;
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else
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lastitem = item;
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}
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item = item->next;
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}
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if (aritem)
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return aritem->name;
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if (lastitem)
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return lastitem->name;
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return 0;
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}
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/*
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* Add a list of symbols to the referenced list.
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*/
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static void
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AppendSymbol(symlist * list, const char *sym)
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{
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list->list = xnfrealloc(list->list, (list->num + 1) * sizeof(char **));
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/* copy the symbol, since it comes from a module
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that can be unloaded later */
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list->list[list->num] = xnfstrdup(sym);
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list->num++;
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}
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static void
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AppendSymList(symlist * list, const char **syms)
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{
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while (*syms) {
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AppendSymbol(list, *syms);
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syms++;
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}
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}
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static int
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SymInList(symlist * list, char *sym)
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{
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int i;
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for (i = 0; i < list->num; i++)
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if (strcmp(list->list[i], sym) == 0)
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return 1;
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return 0;
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}
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void
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LoaderVRefSymbols(const char *sym0, va_list args)
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{
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const char *s;
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if (sym0 == NULL)
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return;
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s = sym0;
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do {
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AppendSymbol(&refList, s);
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s = va_arg(args, const char *);
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} while (s != NULL);
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}
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_X_EXPORT void
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LoaderRefSymbols(const char *sym0, ...)
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{
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va_list ap;
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va_start(ap, sym0);
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LoaderVRefSymbols(sym0, ap);
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va_end(ap);
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}
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void
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LoaderVRefSymLists(const char **list0, va_list args)
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{
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const char **l;
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if (list0 == NULL)
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return;
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l = list0;
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do {
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AppendSymList(&refList, l);
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l = va_arg(args, const char **);
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} while (l != NULL);
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}
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_X_EXPORT void
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LoaderRefSymLists(const char **list0, ...)
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{
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va_list ap;
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va_start(ap, list0);
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LoaderVRefSymLists(list0, ap);
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va_end(ap);
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}
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void
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LoaderVReqSymLists(const char **list0, va_list args)
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{
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const char **l;
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if (list0 == NULL)
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return;
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l = list0;
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do {
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AppendSymList(&reqList, l);
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l = va_arg(args, const char **);
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} while (l != NULL);
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}
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_X_EXPORT void
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LoaderReqSymLists(const char **list0, ...)
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{
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va_list ap;
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va_start(ap, list0);
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LoaderVReqSymLists(list0, ap);
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va_end(ap);
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}
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void
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LoaderVReqSymbols(const char *sym0, va_list args)
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{
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const char *s;
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if (sym0 == NULL)
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return;
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s = sym0;
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do {
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AppendSymbol(&reqList, s);
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s = va_arg(args, const char *);
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} while (s != NULL);
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}
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_X_EXPORT void
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LoaderReqSymbols(const char *sym0, ...)
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{
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va_list ap;
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va_start(ap, sym0);
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LoaderVReqSymbols(sym0, ap);
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va_end(ap);
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}
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/*
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* _LoaderHandleUnresolved() decides what to do with an unresolved
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* symbol. Symbols that are not on the "referenced" or "required" lists
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* get a warning if they are unresolved. Symbols that are on the "required"
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* list generate a fatal error if they are unresolved.
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*/
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int
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_LoaderHandleUnresolved(char *symbol, char *module)
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{
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int fatalsym = 0;
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if (xf86ShowUnresolved && !fatalsym) {
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if (SymInList(&reqList, symbol)) {
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fatalReqSym = 1;
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ErrorF("Required symbol %s from module %s is unresolved!\n",
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symbol, module);
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}
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if (!SymInList(&refList, symbol)) {
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ErrorF("Symbol %s from module %s is unresolved!\n",
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symbol, module);
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}
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}
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return (fatalsym);
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}
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/* Public Interface to the loader. */
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int
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LoaderOpen(const char *module, const char *cname, int handle,
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int *errmaj, int *errmin, int *wasLoaded, int flags)
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{
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loaderPtr tmp;
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int new_handle;
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int fd;
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#if defined(DEBUG)
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ErrorF("LoaderOpen(%s)\n", module);
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#endif
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/*
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* Check to see if the module is already loaded.
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* 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;
|
|
}
|
|
|
|
tmp = _LoaderListPush();
|
|
tmp->name = malloc(strlen(module) + 1);
|
|
strcpy(tmp->name, module);
|
|
tmp->cname = malloc(strlen(cname) + 1);
|
|
strcpy(tmp->cname, cname);
|
|
tmp->handle = new_handle;
|
|
tmp->module = moduleseq++;
|
|
|
|
if ((tmp->private = DLLoadModule(tmp, fd, flags)) == 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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
_X_EXPORT void *
|
|
LoaderSymbol(const char *sym)
|
|
{
|
|
return (DLFindSymbol(sym));
|
|
}
|
|
|
|
_X_EXPORT int
|
|
LoaderCheckUnresolved(int delay_flag)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (fatalReqSym)
|
|
FatalError("Some required symbols were unresolved\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
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);
|
|
}
|
|
DLUnloadModule(tmp->private);
|
|
free(tmp->name);
|
|
free(tmp->cname);
|
|
free(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");
|
|
}
|
|
|
|
unsigned long LoaderOptions = 0;
|
|
|
|
void
|
|
LoaderResetOptions(void)
|
|
{
|
|
LoaderOptions = 0;
|
|
}
|
|
|
|
void
|
|
LoaderSetOptions(unsigned long opts)
|
|
{
|
|
LoaderOptions |= opts;
|
|
}
|
|
|
|
void
|
|
LoaderClearOptions(unsigned long opts)
|
|
{
|
|
LoaderOptions &= ~opts;
|
|
}
|
|
|
|
_X_EXPORT int
|
|
LoaderGetABIVersion(const char *abiclass)
|
|
{
|
|
struct {
|
|
const char *name;
|
|
int version;
|
|
} classes[] = {
|
|
{ ABI_CLASS_ANSIC, LoaderVersionInfo.ansicVersion },
|
|
{ ABI_CLASS_VIDEODRV, LoaderVersionInfo.videodrvVersion },
|
|
{ ABI_CLASS_XINPUT, LoaderVersionInfo.xinputVersion },
|
|
{ ABI_CLASS_EXTENSION, LoaderVersionInfo.extensionVersion },
|
|
{ ABI_CLASS_FONT, LoaderVersionInfo.fontVersion },
|
|
{ NULL, 0 }
|
|
};
|
|
int i;
|
|
|
|
for(i = 0; classes[i].name; i++) {
|
|
if(!strcmp(classes[i].name, abiclass)) {
|
|
return classes[i].version;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|