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xserver-multidpi/hw/xfree86/loader/elfloader.c
Egbert Eich 2fb5886200 Merging XORG-CURRENT into trunk
2004-04-23 19:54:30 +00:00

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/* $XdotOrg$ */
/* $XFree86: xc/programs/Xserver/hw/xfree86/loader/elfloader.c,v 1.61tsi 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.
*/
#include <sys/types.h>
#ifndef __UNIXOS2__
#include <sys/mman.h>
#endif
#include <unistd.h>
#include <stdlib.h>
#ifdef __QNX__
# include <fcntl.h>
#else
# include <sys/fcntl.h>
#endif
#include <sys/stat.h>
#if defined(linux) && defined (__ia64__)
#include <sys/mman.h>
#endif
#ifdef DBMALLOC
# include <debug/malloc.h>
# define Xalloc(size) malloc(size)
# define Xcalloc(size) calloc(1,(size))
# define Xfree(size) free(size)
#endif
#include "Xos.h"
#include "os.h"
#include "elf.h"
#include "sym.h"
#include "loader.h"
#include "compiler.h"
#ifndef LOADERDEBUG
#define LOADERDEBUG 0
#endif
#if LOADERDEBUG
# define ELFDEBUG ErrorF
#endif
#if defined(__ia64__)
/*
* R_IA64_LTOFF22X and R_IA64_LDXMOV are relocation optimizations for
* IA64. Conforming implementations must recognize them and may either
* implement the optimization or may fallback to previous
* non-optimized behavior by treating R_IA64_LTOFF22X as a
* R_IA64_LTOFF22 and ignoring R_IA64_LDXMOV. The
* IA64_LDX_OPTIMIZATION conditional controls the fallback behavior,
* if defined the optimizations are performed.
*
* To implement the optimization we want to change is the sequence on
* the left to that on the right, without regard to any intervening
* instructions:
*
* 1) addl t1=@ltoff(var),gp ==> addl t1=@gprel(var),gp
* 2) ld8 t2=[t1] ==> mov t2=t1
* 3) ld8 loc0=[t2] ==> ld8 loc0=[t2]
*
* The relocations that match the above instructions are:
*
* 1) R_IA64_LTOFF22 ==> R_IA64_LTOFF22X
* 2) -- ==> R_IA64_LDXMOV
* 3) -- ==> --
*
* First lets look at left hand column to understand the original
* mechanism. The virtual address of a symbol is stored in the GOT,
* when that symbol is referenced the following sequence occurs,
* instruction 1 loads the address of the GOT entry containing the
* virtural address of the symbol into t1. Instruction 2 loads the
* virtual address of the symbol into t2 by dereferencing t1. Finally
* the symbol is loaded in instruction 3 by dereferencing its virtual
* address in t2.
*
* The optimization that LTOFF22X/LDXMOV introduces is based on the
* observation we are doing an extra load (instruction 2) if we can
* generate the virtual address for the symbol without doing a lookup in
* the GOT. This is possible if the virtual address of the symbol can be
* computed via GP relative addressing. In other words the virtual
* address of the symbol is a fixed offset from the GP. This fixed offset
* must be within the limits of the signed 22 bit immediate offset in the
* ld8 instruction, otherwise the original indirect GOT lookup must be
* performed (LTOFF22).
*
* If we can use GP relative addressing for the symbol then the
* instruction that loaded the virtual address of the symbol into t2 must
* also be patched, hence the introduction of the LDXMOV relocation. The
* LDXMOV essentially turns the GOT lookup into a no-op by changing the
* ld8 into a register move that preserves the register location of the
* symbol's virtual address (e.g. t2).
*
* The important point to recognize when implementing the LTOFF22X/LDXMOV
* optimization is that relocations are interdependent, the LDXMOV is
* only applied if the LTOFF22X is applied. It is also worth noting that
* there is no relationship between LDXMOV relocations and LTOFF22X in
* the ELF relocation section other than they share the same
* symbol+addend value.
*/
#define IA64_LDX_OPTIMIZATION 1
#endif
#ifndef UseMMAP
# if defined (__ia64__) || defined (__sparc__)
# define MergeSectionAlloc
# endif
#endif
#if defined (DoMMAPedMerge)
# include <sys/mman.h>
# define MergeSectionAlloc
# define MMAP_PROT (PROT_READ | PROT_WRITE | PROT_EXEC)
# if !defined(linux)
# error No MAP_ANON?
# endif
# if !defined (__amd64__) || !defined(__linux__)
# define MMAP_FLAGS (MAP_PRIVATE | MAP_ANON)
# else
# define MMAP_FLAGS (MAP_PRIVATE | MAP_ANON | MAP_32BIT)
# endif
# if defined (MmapPageAlign)
# define MMAP_ALIGN(size) do { \
int pagesize = getpagesize(); \
size = ( size + pagesize - 1) / pagesize; \
size *= pagesize; \
} while (0);
# else
# define MMAP_ALIGN(size)
# endif
#endif
#if defined (__alpha__) || \
defined (__ia64__) || \
defined (__amd64__) || \
(defined (__sparc__) && \
(defined (__arch64__) || \
defined (__sparcv9)))
typedef Elf64_Ehdr Elf_Ehdr;
typedef Elf64_Shdr Elf_Shdr;
typedef Elf64_Sym Elf_Sym;
typedef Elf64_Rel Elf_Rel;
typedef Elf64_Rela Elf_Rela;
typedef Elf64_Addr Elf_Addr;
typedef Elf64_Half Elf_Half;
typedef Elf64_Off Elf_Off;
typedef Elf64_Sword Elf_Sword;
typedef Elf64_Word Elf_Word;
#define ELF_ST_BIND ELF64_ST_BIND
#define ELF_ST_TYPE ELF64_ST_TYPE
#define ELF_R_SYM ELF64_R_SYM
#define ELF_R_TYPE ELF64_R_TYPE
# if defined (__alpha__) || defined (__ia64__)
/*
* The GOT is allocated dynamically. We need to keep a list of entries that
* have already been added to the GOT.
*
*/
typedef struct _elf_GOT_Entry {
Elf_Rela *rel;
int offset;
struct _elf_GOT_Entry *next;
} ELFGotEntryRec, *ELFGotEntryPtr;
typedef struct _elf_GOT {
unsigned int size;
unsigned int nuses;
unsigned char *freeptr;
struct _elf_GOT *next;
unsigned char section[1];
} ELFGotRec, *ELFGotPtr;
# ifdef MergeSectionAlloc
static ELFGotPtr ELFSharedGOTs;
# endif
# endif
# if defined (__ia64__)
/*
* The PLT is allocated dynamically. We need to keep a list of entries that
* have already been added to the PLT.
*/
typedef struct _elf_PLT_Entry {
Elf_Rela *rel;
int offset;
int gotoffset;
struct _elf_PLT_Entry *next;
} ELFPltEntryRec, *ELFPltEntryPtr;
/*
* The OPD is allocated dynamically within the GOT. We need to keep a list
* of entries that have already been added to the OPD.
*/
typedef struct _elf_OPD {
LOOKUP *l;
int index;
int offset;
struct _elf_OPD *next;
} ELFOpdRec, *ELFOpdPtr;
# endif
#else
typedef Elf32_Ehdr Elf_Ehdr;
typedef Elf32_Shdr Elf_Shdr;
typedef Elf32_Sym Elf_Sym;
typedef Elf32_Rel Elf_Rel;
typedef Elf32_Rela Elf_Rela;
typedef Elf32_Addr Elf_Addr;
typedef Elf32_Half Elf_Half;
typedef Elf32_Off Elf_Off;
typedef Elf32_Sword Elf_Sword;
typedef Elf32_Word Elf_Word;
#define ELF_ST_BIND ELF32_ST_BIND
#define ELF_ST_TYPE ELF32_ST_TYPE
#define ELF_R_SYM ELF32_R_SYM
#define ELF_R_TYPE ELF32_R_TYPE
#endif
#if defined(__powerpc__) || \
defined(__mc68000__) || \
defined(__alpha__) || \
defined(__sparc__) || \
defined(__ia64__) || \
defined(__amd64__)
typedef Elf_Rela Elf_Rel_t;
#else
typedef Elf_Rel Elf_Rel_t;
#endif
typedef struct {
void *saddr;
char *name;
int ndx;
int size;
int flags;
} LoadSection;
#define RELOC_SECTION 0x1
#define LOADED_SECTION 0x2
/*
* This structure contains all of the information about a module
* that has been loaded.
*/
typedef struct {
int handle;
int module;
int fd;
loader_funcs *funcs;
Elf_Ehdr *header; /* file header */
int numsh;
Elf_Shdr *sections; /* Address of the section header table */
int secsize; /* size of the section table */
unsigned char **saddr; /* Start addresss of the section pointer table */
unsigned char *shstraddr; /* Start address of the section header string table */
int shstrndx; /* index of the section header string table */
int shstrsize; /* size of the section header string table */
#if defined(__alpha__) || defined(__ia64__)
unsigned char *got; /* Start address of the .got section */
ELFGotEntryPtr got_entries; /* List of entries in the .got section */
int gotndx; /* index of the .got section */
int gotsize; /* actual size of the .got section */
ELFGotPtr shared_got; /* Pointer to ELFGotRec if shared */
#endif /*(__alpha__) || (__ia64__) */
#if defined(__ia64__)
ELFOpdPtr opd_entries; /* List of entries in the .opd section */
unsigned char *plt; /* Start address of the .plt section */
ELFPltEntryPtr plt_entries; /* List of entries in the .plt section */
int pltndx; /* index of the .plt section */
int pltsize; /* size of the .plt section */
#endif /*__ia64__*/
Elf_Sym *symtab; /* Start address of the .symtab section */
int symndx; /* index of the .symtab section */
unsigned char *common; /* Start address of the SHN_COMMON space */
int comsize; /* size of the SHN_COMMON space */
unsigned char *base; /* Alloced address of section block */
unsigned long baseptr; /* Pointer to next free space in base */
int basesize; /* Size of that allocation */
unsigned char *straddr; /* Start address of the string table */
int strndx; /* index of the string table */
int strsize; /* size of the string table */
LoadSection *lsection;
int lsectidx;
} ELFModuleRec, *ELFModulePtr;
/*
* If a relocation is unable to be satisfied, then put it on a list
* to try later after more modules have been loaded.
*/
typedef struct _elf_reloc {
Elf_Rel_t *rel;
ELFModulePtr file;
Elf_Word secn;
struct _elf_reloc *next;
} ELFRelocRec;
/*
* symbols with a st_shndx of COMMON need to have space allocated for them.
*
* Gather all of these symbols together, and allocate one chunk when we
* are done.
*/
typedef struct _elf_COMMON {
Elf_Sym *sym;
struct _elf_COMMON *next;
} ELFCommonRec;
static ELFCommonPtr listCOMMON = NULL;
/* Prototypes for static functions */
static int ELFhashCleanOut(void *, itemPtr);
static char *ElfGetStringIndex(ELFModulePtr, int, int);
static char *ElfGetString(ELFModulePtr, int);
static char *ElfGetSectionName(ELFModulePtr, int);
static ELFRelocPtr ElfDelayRelocation(ELFModulePtr, Elf_Word, Elf_Rel_t *);
static ELFCommonPtr ElfAddCOMMON(Elf_Sym *);
static int ElfCOMMONSize(void);
static int ElfCreateCOMMON(ELFModulePtr, LOOKUP *);
static char *ElfGetSymbolNameIndex(ELFModulePtr, int, int);
static char *ElfGetSymbolName(ELFModulePtr, int);
static Elf_Addr ElfGetSymbolValue(ELFModulePtr, int);
static ELFRelocPtr Elf_RelocateEntry(ELFModulePtr, Elf_Word, Elf_Rel_t *,
int);
static ELFRelocPtr ELFCollectRelocations(ELFModulePtr, int);
static LOOKUP *ELF_GetSymbols(ELFModulePtr, unsigned short **);
static void ELFCollectSections(ELFModulePtr, int, int *, int *);
#if defined(__alpha__) || defined(__ia64__)
static void ElfAddGOT(ELFModulePtr, Elf_Rel_t *);
static int ELFCreateGOT(ELFModulePtr, int);
#endif
#if defined(__ia64__)
static void ElfAddOPD(ELFModulePtr, int, LOOKUP *);
static void ELFCreateOPD(ELFModulePtr);
static void ElfAddPLT(ELFModulePtr, Elf_Rel_t *);
static void ELFCreatePLT(ELFModulePtr);
enum ia64_operand {
IA64_OPND_IMM22,
IA64_OPND_TGT25C,
IA64_OPND_LDXMOV
};
static void IA64InstallReloc(unsigned long *, int, enum ia64_operand, long);
#endif /*__ia64__*/
#ifdef MergeSectionAlloc
static void *
ELFLoaderSectToMem(ELFModulePtr elffile, int align, unsigned long offset,
int size, char *label)
{
void *ret;
elffile->baseptr = (elffile->baseptr + align - 1) & ~(align - 1);
ret = (void *)elffile->baseptr;
_LoaderFileRead(elffile->fd, offset, ret, size);
elffile->baseptr += size;
return ret;
}
static void *
ELFLoaderSectCalloc(ELFModulePtr elffile, int align, int size)
{
void *ret;
elffile->baseptr = (elffile->baseptr + align - 1) & ~(align - 1);
ret = (void *)elffile->baseptr;
elffile->baseptr += size;
#ifndef DoMMAPedMerge
memset(ret, 0, size); /* mmap() does this for us */
#endif
return ret;
}
#else /* MergeSectionAlloc */
# define ELFLoaderSectToMem(elffile,align,offset,size,label) \
_LoaderFileToMem((elffile)->fd,offset,size,label)
# define ELFLoaderSectCalloc(elffile,align,size) xf86loadercalloc(1,size)
#endif
/*
* Utility Functions
*/
static int
ELFhashCleanOut(void *voidptr, itemPtr item)
{
ELFModulePtr module = (ELFModulePtr) voidptr;
return (module->handle == item->handle);
}
/*
* Manage listResolv
*/
static ELFRelocPtr
ElfDelayRelocation(ELFModulePtr elffile, Elf_Word secn, Elf_Rel_t *rel)
{
ELFRelocPtr reloc;
if ((reloc = xf86loadermalloc(sizeof(ELFRelocRec))) == NULL) {
ErrorF("ElfDelayRelocation() Unable to allocate memory!!!!\n");
return 0;
}
reloc->file = elffile;
reloc->secn = secn;
reloc->rel = rel;
reloc->next = 0;
#ifdef ELFDEBUG
ELFDEBUG("ElfDelayRelocation %p: file %p, sec %d,"
" r_offset 0x%lx, r_info 0x%x",
(void *)reloc, (void *)elffile, secn,
(unsigned long)rel->r_offset, rel->r_info);
# if defined(__powerpc__) || \
defined(__mc68000__) || \
defined(__alpha__) || \
defined(__sparc__) || \
defined(__ia64__) || \
defined(__amd64__)
ELFDEBUG(", r_addend 0x%lx", rel->r_addend);
# endif
ELFDEBUG("\n");
#endif
return reloc;
}
/*
* Manage listCOMMON
*/
static ELFCommonPtr
ElfAddCOMMON(Elf_Sym *sym)
{
ELFCommonPtr common;
if ((common = xf86loadermalloc(sizeof(ELFCommonRec))) == NULL) {
ErrorF("ElfAddCOMMON() Unable to allocate memory!!!!\n");
return 0;
}
common->sym = sym;
common->next = 0;
return common;
}
static int
ElfCOMMONSize(void)
{
int size = 0;
ELFCommonPtr common;
for (common = listCOMMON; common; common = common->next) {
size += common->sym->st_size;
#if defined(__alpha__) || \
defined(__ia64__) || \
defined(__amd64__) || \
(defined(__sparc__) && \
(defined(__arch64__) || \
defined(__sparcv9)))
size = (size + 7) & ~0x7;
#endif
}
return size;
}
static int
ElfCreateCOMMON(ELFModulePtr elffile, LOOKUP *pLookup)
{
int numsyms = 0, size = 0, l = 0;
int offset = 0, firstcommon = 0;
ELFCommonPtr common;
if (listCOMMON == NULL)
return TRUE;
for (common = listCOMMON; common; common = common->next) {
size += common->sym->st_size;
#if defined(__alpha__) || \
defined(__ia64__) || \
defined(__amd64__) || \
(defined(__sparc__) && \
(defined(__arch64__) || \
defined(__sparcv9)))
size = (size + 7) & ~0x7;
#endif
numsyms++;
}
#ifdef ELFDEBUG
ELFDEBUG("ElfCreateCOMMON() %d entries (%d bytes) of COMMON data\n",
numsyms, size);
#endif
elffile->comsize = size;
if ((elffile->common = ELFLoaderSectCalloc(elffile, 8, size)) == NULL) {
ErrorF("ElfCreateCOMMON() Unable to allocate memory!!!!\n");
return FALSE;
}
if (DebuggerPresent) {
ldrCommons = xf86loadermalloc(numsyms * sizeof(LDRCommon));
nCommons = numsyms;
}
for (l = 0; pLookup[l].symName; l++) ;
firstcommon = l;
/* Traverse the common list and create a lookup table with all the
* common symbols. Destroy the common list in the process.
* See also ResolveSymbols.
*/
while (listCOMMON) {
common = listCOMMON;
/* this is xstrdup because is should be more efficient. it is freed
* with xf86loaderfree
*/
pLookup[l].symName =
xf86loaderstrdup(ElfGetString(elffile, common->sym->st_name));
pLookup[l].offset = (funcptr) (elffile->common + offset);
#ifdef ELFDEBUG
ELFDEBUG("Adding common %p %s\n",
(void *)pLookup[l].offset, pLookup[l].symName);
#endif
/* Record the symbol address for gdb */
if (DebuggerPresent && ldrCommons) {
ldrCommons[l - firstcommon].addr = (void *)pLookup[l].offset;
ldrCommons[l - firstcommon].name = pLookup[l].symName;
ldrCommons[l - firstcommon].namelen = strlen(pLookup[l].symName);
}
listCOMMON = common->next;
offset += common->sym->st_size;
#if defined(__alpha__) || \
defined(__ia64__) || \
defined(__amd64__) || \
(defined(__sparc__) && \
(defined(__arch64__) || \
defined(__sparcv9)))
offset = (offset + 7) & ~0x7;
#endif
xf86loaderfree(common);
l++;
}
/* listCOMMON == 0 */
pLookup[l].symName = NULL; /* Terminate the list. */
return TRUE;
}
/*
* String Table
*/
static char *
ElfGetStringIndex(ELFModulePtr file, int offset, int index)
{
if (!offset || !index)
return "";
return (char *)(file->saddr[index] + offset);
}
static char *
ElfGetString(ELFModulePtr file, int offset)
{
return ElfGetStringIndex(file, offset, file->strndx);
}
static char *
ElfGetSectionName(ELFModulePtr file, int offset)
{
return (char *)(file->shstraddr + offset);
}
/*
* Symbol Table
*/
/*
* Get symbol name
*/
static char *
ElfGetSymbolNameIndex(ELFModulePtr elffile, int index, int secndx)
{
Elf_Sym *syms;
#ifdef ELFDEBUG
ELFDEBUG("ElfGetSymbolNameIndex(%x,%x) ", index, secndx);
#endif
syms = (Elf_Sym *) elffile->saddr[secndx];
#ifdef ELFDEBUG
ELFDEBUG("%s ", ElfGetString(elffile, syms[index].st_name));
ELFDEBUG("%x %x ", ELF_ST_BIND(syms[index].st_info),
ELF_ST_TYPE(syms[index].st_info));
ELFDEBUG("%lx\n", (unsigned long)syms[index].st_value);
#endif
return ElfGetString(elffile, syms[index].st_name);
}
static char *
ElfGetSymbolName(ELFModulePtr elffile, int index)
{
return ElfGetSymbolNameIndex(elffile, index, elffile->symndx);
}
static Elf_Addr
ElfGetSymbolValue(ELFModulePtr elffile, int index)
{
Elf_Sym *syms;
Elf_Addr symval = 0; /* value of the indicated symbol */
char *symname = NULL; /* name of symbol in relocation */
itemPtr symbol = NULL; /* name/value of symbol */
syms = (Elf_Sym *) elffile->saddr[elffile->symndx];
switch (ELF_ST_TYPE(syms[index].st_info)) {
case STT_NOTYPE:
case STT_OBJECT:
case STT_FUNC:
switch (ELF_ST_BIND(syms[index].st_info)) {
case STB_LOCAL:
symval = (Elf_Addr) (elffile->saddr[syms[index].st_shndx] +
syms[index].st_value);
#ifdef __ia64__
if (ELF_ST_TYPE(syms[index].st_info) == STT_FUNC) {
ELFOpdPtr opdent;
for (opdent = elffile->opd_entries; opdent;
opdent = opdent->next)
if (opdent->index == index)
break;
if (opdent) {
((unsigned long *)(elffile->got + opdent->offset))[0] =
symval;
((unsigned long *)(elffile->got + opdent->offset))[1] =
(long)elffile->got;
symval = (Elf_Addr) (elffile->got + opdent->offset);
}
}
#endif
break;
case STB_GLOBAL:
case STB_WEAK: /* STB_WEAK seems like a hack to cover for
* some other problem */
symname = ElfGetString(elffile, syms[index].st_name);
symbol = LoaderHashFind(symname);
if (symbol == 0) {
return 0;
}
symval = (Elf_Addr) symbol->address;
break;
default:
symval = 0;
ErrorF("ElfGetSymbolValue(), unhandled symbol scope %x\n",
ELF_ST_BIND(syms[index].st_info));
break;
}
#ifdef ELFDEBUG
ELFDEBUG("%p\t", (void *)symbol);
ELFDEBUG("%lx\t", (unsigned long)symval);
ELFDEBUG("%s\n", symname ? symname : "NULL");
#endif
break;
case STT_SECTION:
symval = (Elf_Addr) elffile->saddr[syms[index].st_shndx];
#ifdef ELFDEBUG
ELFDEBUG("ST_SECTION %lx\n", (unsigned long)symval);
#endif
break;
case STT_FILE:
case STT_LOPROC:
case STT_HIPROC:
default:
symval = 0;
ErrorF("ElfGetSymbolValue(), unhandled symbol type %x\n",
ELF_ST_TYPE(syms[index].st_info));
break;
}
return symval;
}
#if defined(__powerpc__)
/*
* This function returns the address of a pseudo PLT routine which can
* be used to compute a function offset. This is needed because loaded
* modules have an offset from the .text section of greater than 24 bits.
* The code generated makes the assumption that all function entry points
* will be within a 24 bit offset (non-PIC code).
*/
static Elf_Addr
ElfGetPltAddr(ELFModulePtr elffile, int index)
{
Elf_Sym *syms;
Elf_Addr symval = 0; /* value of the indicated symbol */
char *symname = NULL; /* name of symbol in relocation */
itemPtr symbol; /* name/value of symbol */
syms = (Elf_Sym *) elffile->saddr[elffile->symndx];
switch (ELF_ST_TYPE(syms[index].st_info)) {
case STT_NOTYPE:
case STT_OBJECT:
case STT_FUNC:
switch (ELF_ST_BIND(syms[index].st_info)) {
case STB_GLOBAL:
symname = ElfGetString(elffile, syms[index].st_name);
symbol = LoaderHashFind(symname);
if (symbol == 0)
return 0;
/*
* Here we are building up a pseudo Plt function that can make a call to
* a function that has an offset greater than 24 bits. The following code
* is being used to implement this.
1 00000000 .extern realfunc
2 00000000 .global pltfunc
3 00000000 pltfunc:
4 00000000 3d 80 00 00 lis r12,hi16(realfunc)
5 00000004 61 8c 00 00 ori r12,r12,lo16(realfunc)
6 00000008 7d 89 03 a6 mtctr r12
7 0000000c 4e 80 04 20 bctr
*/
symbol->code.plt[0] = 0x3d80; /* lis r12 */
symbol->code.plt[1] =
(((Elf_Addr) symbol->address) & 0xffff0000) >> 16;
symbol->code.plt[2] = 0x618c; /* ori r12,r12 */
symbol->code.plt[3] = (((Elf_Addr) symbol->address) & 0xffff);
symbol->code.plt[4] = 0x7d89; /* mtcr r12 */
symbol->code.plt[5] = 0x03a6;
symbol->code.plt[6] = 0x4e80; /* bctr */
symbol->code.plt[7] = 0x0420;
symbol->address = (char *)&symbol->code.plt[0];
symval = (Elf_Addr) symbol->address;
ppc_flush_icache(&symbol->code.plt[0]);
ppc_flush_icache(&symbol->code.plt[6]);
break;
default:
symval = 0;
ErrorF("ElfGetPltAddr(), unhandled symbol scope %x\n",
ELF_ST_BIND(syms[index].st_info));
break;
}
# ifdef ELFDEBUG
ELFDEBUG("ElfGetPlt: symbol=%lx\t", symbol);
ELFDEBUG("newval=%lx\t", symval);
ELFDEBUG("name=\"%s\"\n", symname ? symname : "NULL");
# endif
break;
case STT_SECTION:
case STT_FILE:
case STT_LOPROC:
case STT_HIPROC:
default:
symval = 0;
ErrorF("ElfGetPltAddr(), Unexpected symbol type %x",
ELF_ST_TYPE(syms[index].st_info));
ErrorF("for a Plt request\n");
break;
}
return symval;
}
#endif /* __powerpc__ */
#if defined(__alpha__) || defined(__ia64__)
/*
* Manage GOT Entries
*/
static void
ElfAddGOT(ELFModulePtr elffile, Elf_Rel_t *rel)
{
ELFGotEntryPtr gotent;
# ifdef ELFDEBUG
{
Elf_Sym *sym;
sym = (Elf_Sym *) & (elffile->symtab[ELF_R_SYM(rel->r_info)]);
if (sym->st_name) {
ELFDEBUG("ElfAddGOT: Adding GOT entry for %s\n",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
} else
ELFDEBUG("ElfAddGOT: Adding GOT entry for %s\n",
ElfGetSectionName(elffile,
elffile->sections[sym->st_shndx].
sh_name));
}
# endif
for (gotent = elffile->got_entries; gotent; gotent = gotent->next) {
if (ELF_R_SYM(gotent->rel->r_info) == ELF_R_SYM(rel->r_info) &&
gotent->rel->r_addend == rel->r_addend)
break;
}
if (gotent) {
# ifdef ELFDEBUG
ELFDEBUG("Entry already present in GOT\n");
# endif
return;
}
if ((gotent = xf86loadermalloc(sizeof(ELFGotEntryRec))) == NULL) {
ErrorF("ElfAddGOT() Unable to allocate memory!!!!\n");
return;
}
# ifdef ELFDEBUG
ELFDEBUG("Entry added with offset %x\n", elffile->gotsize);
# endif
gotent->rel = rel;
gotent->offset = elffile->gotsize;
gotent->next = elffile->got_entries;
elffile->got_entries = gotent;
elffile->gotsize += 8;
return;
}
static int
ELFCreateGOT(ELFModulePtr elffile, int maxalign)
{
# ifdef MergeSectionAlloc
ELFGotPtr gots;
# endif
int gotsize;
/*
* XXX: Is it REALLY needed to ensure GOT's are non-null?
*/
# ifdef ELFDEBUG
ELFDEBUG("ELFCreateGOT: %x entries in the GOT\n", elffile->gotsize / 8);
/*
* Hmmm. Someone is getting here without any got entries, but they
* may still have R_ALPHA_GPDISP relocations against the got.
*/
if (elffile->gotsize == 0)
ELFDEBUG("Module %s doesn't have any GOT entries!\n",
_LoaderModuleToName(elffile->module));
# endif
if (elffile->gotsize == 0)
elffile->gotsize = 8;
elffile->sections[elffile->gotndx].sh_size = elffile->gotsize;
gotsize = elffile->gotsize;
# ifdef MergeSectionAlloc
# ifdef __alpha__
# define GOTDistance 0x100000
# endif
# ifdef __ia64__
# define GOTDistance 0x200000
# endif
for (gots = ELFSharedGOTs; gots; gots = gots->next) {
if (gots->freeptr + elffile->gotsize > gots->section + gots->size)
continue;
if (gots->section > elffile->base) {
if (gots->section + gots->size - elffile->base >= GOTDistance)
continue;
} else {
if (elffile->base + elffile->basesize - gots->section >=
GOTDistance)
continue;
}
elffile->got = gots->freeptr;
elffile->shared_got = gots;
gots->freeptr = gots->freeptr + elffile->gotsize;
gots->nuses++;
# ifdef ELFDEBUG
ELFDEBUG("ELFCreateGOT: GOT address %lx in shared GOT, nuses %d\n",
elffile->got, gots->nuses);
# endif
return TRUE;
}
gotsize += 16383 + sizeof(ELFGotRec);
# endif /*MergeSectionAlloc */
if ((elffile->got = xf86loadermalloc(gotsize)) == NULL) {
ErrorF("ELFCreateGOT() Unable to allocate memory!!!!\n");
return FALSE;
}
# ifdef MergeSectionAlloc
if (elffile->got > elffile->base) {
if (elffile->got + elffile->gotsize - elffile->base >= GOTDistance)
gotsize = 0;
} else {
if (elffile->base + elffile->basesize - elffile->got >= GOTDistance)
gotsize = 0;
}
if (!gotsize) {
xf86loaderfree(elffile->got);
# if !defined(DoMMAPedMerge)
elffile->basesize += 8 + elffile->gotsize;
elffile->base = xf86loaderrealloc(elffile->base, elffile->basesize);
if (elffile->base == NULL) {
ErrorF("ELFCreateGOT() Unable to reallocate memory!!!!\n");
return FALSE;
}
# if defined(linux) || defined(__OpenBSD__)
{
unsigned long page_size = getpagesize();
unsigned long round;
round = (unsigned long)elffile->base & (page_size - 1);
mprotect(elffile->base - round,
(elffile->basesize + round + page_size -
1) & ~(page_size - 1),
PROT_READ | PROT_WRITE | PROT_EXEC);
}
# endif
# else
{
int oldbasesize = elffile->basesize;
elffile->basesize += 8 + elffile->gotsize;
MMAP_ALIGN(elffile->basesize);
elffile->base = mremap(elffile->base, oldbasesize,
elffile->basesize, MREMAP_MAYMOVE);
if (elffile->base == NULL) {
ErrorF("ELFCreateGOT() Unable to remap memory!!!!\n");
return FALSE;
}
}
# endif
elffile->baseptr =
((long)elffile->base + (maxalign - 1)) & ~(maxalign - 1);
elffile->got =
(unsigned char
*)((long)(elffile->base + elffile->basesize -
elffile->gotsize) & ~7);
} else {
gots = (ELFGotPtr) elffile->got;
elffile->got = gots->section;
gots->size = gotsize - sizeof(ELFGotRec) + 1;
gots->nuses = 1;
gots->freeptr = gots->section + elffile->gotsize;
gots->next = ELFSharedGOTs;
ELFSharedGOTs = gots;
elffile->shared_got = gots;
# ifdef ELFDEBUG
ELFDEBUG("ELFCreateGOT: Created a shareable GOT with size %d\n",
gots->size);
# endif
}
# endif /*MergeSectionAlloc */
# ifdef ELFDEBUG
ELFDEBUG("ELFCreateGOT: GOT address %lx\n", elffile->got);
# endif
return TRUE;
}
#endif /* defined(__alpha__) || defined(__ia64__) */
#if defined(__ia64__)
/*
* Manage OPD Entries
*/
static void
ElfAddOPD(ELFModulePtr elffile, int index, LOOKUP *l)
{
ELFOpdPtr opdent;
if (index != -1) {
for (opdent = elffile->opd_entries; opdent; opdent = opdent->next)
if (opdent->index == index)
return;
}
if ((opdent = xf86loadermalloc(sizeof(ELFOpdRec))) == NULL) {
ErrorF("ElfAddOPD() Unable to allocate memory!!!!\n");
return;
}
# ifdef ELFDEBUG
ELFDEBUG("OPD Entry %d added with offset %x\n", index, elffile->gotsize);
# endif
opdent->l = l;
opdent->index = index;
opdent->offset = elffile->gotsize;
opdent->next = elffile->opd_entries;
elffile->opd_entries = opdent;
elffile->gotsize += 16;
return;
}
static void
ELFCreateOPD(ELFModulePtr elffile)
{
ELFOpdPtr opdent;
if (elffile->got == NULL)
ErrorF("ELFCreateOPD() Unallocated GOT!!!!\n");
for (opdent = elffile->opd_entries; opdent; opdent = opdent->next) {
if (opdent->index != -1)
continue;
((unsigned long *)(elffile->got + opdent->offset))[0] =
(long)opdent->l->offset;
((unsigned long *)(elffile->got + opdent->offset))[1] =
(long)elffile->got;
opdent->l->offset = (funcptr) (elffile->got + opdent->offset);
}
}
/*
* Manage PLT Entries
*/
static void
ElfAddPLT(ELFModulePtr elffile, Elf_Rel_t *rel)
{
ELFPltEntryPtr pltent;
# ifdef ELFDEBUG
{
Elf_Sym *sym;
sym = (Elf_Sym *) & (elffile->symtab[ELF_R_SYM(rel->r_info)]);
if (sym->st_name) {
ELFDEBUG("ElfAddPLT: Adding PLT entry for %s\n",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
} else
ErrorF("ElfAddPLT: Add PLT entry for section??\n");
}
# endif
if (rel->r_addend)
ErrorF("ElfAddPLT: Add PLT entry with non-zero addend??\n");
for (pltent = elffile->plt_entries; pltent; pltent = pltent->next) {
if (ELF_R_SYM(pltent->rel->r_info) == ELF_R_SYM(rel->r_info))
break;
}
if (pltent) {
# ifdef ELFDEBUG
ELFDEBUG("Entry already present in PLT\n");
# endif
return;
}
if ((pltent = xf86loadermalloc(sizeof(ELFPltEntryRec))) == NULL) {
ErrorF("ElfAddPLT() Unable to allocate memory!!!!\n");
return;
}
# ifdef ELFDEBUG
ELFDEBUG("Entry added with offset %x\n", elffile->pltsize);
# endif
pltent->rel = rel;
pltent->offset = elffile->pltsize;
pltent->gotoffset = elffile->gotsize;
pltent->next = elffile->plt_entries;
elffile->plt_entries = pltent;
elffile->pltsize += 32;
elffile->gotsize += 16;
return;
}
static void
ELFCreatePLT(ELFModulePtr elffile)
{
# ifdef ELFDEBUG
ELFDEBUG("ELFCreatePLT: %x entries in the PLT\n", elffile->pltsize / 8);
# endif
if (elffile->pltsize == 0)
return;
if ((elffile->plt =
ELFLoaderSectCalloc(elffile, 32, elffile->pltsize)) == NULL) {
ErrorF("ELFCreatePLT() Unable to allocate memory!!!!\n");
return;
}
# if defined(linux) || defined(__OpenBSD__)
{
unsigned long page_size = getpagesize();
unsigned long round;
round = (unsigned long)elffile->plt & (page_size - 1);
mprotect(elffile->plt - round,
(elffile->pltsize + round + page_size - 1) & ~(page_size - 1),
PROT_READ | PROT_WRITE | PROT_EXEC);
}
# endif
elffile->sections[elffile->pltndx].sh_size = elffile->pltsize;
# ifdef ELFDEBUG
ELFDEBUG("ELFCreatePLT: PLT address %lx\n", elffile->plt);
# endif
return;
}
static void
IA64InstallReloc(unsigned long *data128, int slot, enum ia64_operand opnd,
long value)
{
unsigned long data = 0;
# ifdef ELFDEBUG
ELFDEBUG("\nIA64InstallReloc %p %d %d %016lx\n", data128, slot, opnd,
value);
ELFDEBUG("Before [%016lx%016lx]\n", data128[1], data128[0]);
# endif
switch (slot) {
case 0:
data = *data128;
break;
case 1:
memcpy(&data, (char *)data128 + 5, 8);
break;
case 2:
memcpy(&data, (char *)data128 + 10, 6);
break;
default:
FatalError("Unexpected slot in IA64InstallReloc()\n");
}
switch (opnd) {
case IA64_OPND_IMM22:
data &= ~(0x3fff9fc0000UL << slot);
data |= (value & 0x7f) << (18 + slot); /* [13:19] + 5 + slot */
data |= (value & 0xff80) << (25 + slot); /* [27:35] + 5 + slot */
data |= (value & 0x1f0000) << (11 + slot); /* [22:26] + 5 + slot */
data |= (value & 0x200000) << (20 + slot); /* [36:36] + 5 + slot */
if (value << 42 >> 42 != value)
ErrorF("Relocation %016lx truncated to fit into IMM22\n", value);
break;
case IA64_OPND_TGT25C:
data &= ~(0x23ffffc0000UL << slot);
data |= (value & 0xfffff0) << (14 + slot); /* [13:32] + 5 + slot */
data |= (value & 0x1000000) << (17 + slot); /* [36:36] + 5 + slot */
if (value << 39 >> 39 != value || (value & 0xf))
ErrorF("Relocation %016lx truncated to fit into TGT25C\n", value);
break;
#ifdef IA64_LDX_OPTIMIZATION
case IA64_OPND_LDXMOV:
/*
* Convert "ld8 t2=[t1]" to "mov t2=t1" which is really "add t2=0,t1"
* Mask all but the r3,r1,qp fields,
* then OR in the ALU opcode = 8 into the opcode field [40:37]
*
* Mask for the r3,r1,qp bit fields [26:20][12:6][5:0] = 0x7f01fff,
* This mask negated only within the 41 bit wide instruction and
* shifted left by 5 for the bundle template is 0x3FFF01FC0000
*
* opcode field [40:37] with a value of 8 is 0x10000000000
* shifted left by 5 for the bundle template is 0x200000000000
*
*/
data &= ~(0x3FFF01FC0000 << slot);
data |= (0x200000000000 << slot);
break;
#endif
default:
FatalError("Unhandled operand in IA64InstallReloc()\n");
}
switch (slot) {
case 0:
*data128 = data;
break;
case 1:
memcpy((char *)data128 + 5, &data, 8);
break;
case 2:
memcpy((char *)data128 + 10, &data, 6);
break;
default:
FatalError("Unexpected slot in IA64InstallReloc()\n");
}
ia64_flush_cache(data128);
# ifdef ELFDEBUG
ELFDEBUG("After [%016lx%016lx]\n", data128[1], data128[0]);
# endif
}
#endif /*__ia64__*/
/*
* Fix all of the relocations for the given section.
* If the argument 'force' is non-zero, then the relocation will be
* made even if the symbol can't be found (by substituting
* LoaderDefaultFunc) otherwise, the relocation will be deferred.
*/
static ELFRelocPtr
Elf_RelocateEntry(ELFModulePtr elffile, Elf_Word secn, Elf_Rel_t *rel,
int force)
{
unsigned char *secp = elffile->saddr[secn];
#if !defined(__ia64__)
unsigned int *dest32; /* address of the 32 bit place being modified */
#endif
#if defined(__powerpc__) || defined(__sparc__)
unsigned short *dest16; /* address of the 16 bit place being modified */
#endif
#if defined(__sparc__)
unsigned char *dest8; /* address of the 8 bit place being modified */
unsigned long *dest64;
#endif
#if defined(__alpha__)
unsigned int *dest32h; /* address of the high 32 bit place being modified */
unsigned long *dest64;
unsigned short *dest16;
#endif
#if defined(__amd64__)
unsigned long *dest64;
int *dest32s;
#endif
#if defined(__ia64__)
unsigned long *dest64;
unsigned long *dest128;
#endif
Elf_Addr symval = 0; /* value of the indicated symbol */
#ifdef ELFDEBUG
ELFDEBUG("%lx %d %d\n", (unsigned long)rel->r_offset,
ELF_R_SYM(rel->r_info), ELF_R_TYPE(rel->r_info));
# if defined(__powerpc__) || \
defined(__mc68000__) || \
defined(__alpha__) || \
defined(__sparc__) || \
defined(__ia64__) || \
defined(__amd64__)
ELFDEBUG("%lx", rel->r_addend);
# endif
ELFDEBUG("\n");
#endif /*ELFDEBUG*/
#if defined(__alpha__)
if (ELF_R_SYM(rel->r_info)
&& ELF_R_TYPE(rel->r_info) != R_ALPHA_GPDISP)
#else
if (ELF_R_SYM(rel->r_info))
#endif
{
symval = ElfGetSymbolValue(elffile, ELF_R_SYM(rel->r_info));
if (symval == 0) {
if (force) {
symval = (Elf_Addr) & LoaderDefaultFunc;
} else {
#ifdef ELFDEBUG
ELFDEBUG("***Unable to resolve symbol %s\n",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
#endif
return ElfDelayRelocation(elffile, secn, rel);
}
}
}
switch (ELF_R_TYPE(rel->r_info)) {
#if defined(i386)
case R_386_32:
dest32 = (unsigned int *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_386_32\t");
ELFDEBUG("dest32=%p\t", (void *)dest32);
ELFDEBUG("*dest32=%8.8x\t", (unsigned int)*dest32);
# endif
*dest32 = symval + (*dest32); /* S + A */
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8x\n", (unsigned int)*dest32);
# endif
break;
case R_386_PC32:
dest32 = (unsigned int *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_386_PC32 %s\t",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
ELFDEBUG("secp=%p\t", secp);
ELFDEBUG("symval=%lx\t", (unsigned long)symval);
ELFDEBUG("dest32=%p\t", (void *)dest32);
ELFDEBUG("*dest32=%8.8x\t", (unsigned int)*dest32);
# endif
*dest32 = symval + (*dest32) - (Elf_Addr) dest32; /* S + A - P */
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8x\n", (unsigned int)*dest32);
# endif
break;
#endif /* i386 */
#if defined(__amd64__)
case R_X86_64_32:
dest32 = (unsigned int *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_X86_32\t");
ELFDEBUG("dest32=%x\t", dest32);
ELFDEBUG("*dest32=%8.8lx\t", *dest32);
ELFDEBUG("r_addend=%lx\t", rel->r_addend);
# endif
*dest32 = symval + rel->r_addend + (*dest32); /* S + A */
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8lx\n", *dest32);
# endif
break;
case R_X86_64_32S:
dest32s = (int *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_X86_64_32\t");
ELFDEBUG("dest32s=%x\t", dest32s);
ELFDEBUG("*dest32s=%8.8lx\t", *dest32s);
ELFDEBUG("r_addend=%lx\t", rel->r_addend);
# endif
*dest32s = symval + rel->r_addend + (*dest32s); /* S + A */
# ifdef ELFDEBUG
ELFDEBUG("*dest32s=%8.8lx\n", *dest32s);
# endif
break;
case R_X86_64_PC32:
dest32 = (unsigned int *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_X86_64_PC32 %s\t",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
ELFDEBUG("secp=%x\t", secp);
ELFDEBUG("symval=%lx\t", symval);
ELFDEBUG("dest32=%x\t", dest32);
ELFDEBUG("*dest32=%8.8lx\t", *dest32);
ELFDEBUG("r_addend=%lx\t", rel->r_addend);
# endif
*dest32 = symval + rel->r_addend + (*dest32) - (Elf_Addr) dest32; /* S + A - P */
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8lx\n", *dest32);
# endif
break;
case R_X86_64_64:
dest64 = (unsigned long *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_AMD64_64\t");
ELFDEBUG("dest64=%x\t", dest64);
ELFDEBUG("*dest64=%8.8lx\t", *dest64);
ELFDEBUG("r_addend=%lx\t", rel->r_addend);
# endif
*dest64 = symval + rel->r_addend + (*dest64); /* S + A */
# ifdef ELFDEBUG
ELFDEBUG("*dest64=%8.8lx\n", *dest64);
# endif
break;
#endif /* __amd64__ */
#if defined(__alpha__)
case R_ALPHA_NONE:
case R_ALPHA_LITUSE:
break;
case R_ALPHA_REFQUAD:
dest64 = (unsigned long *)(secp + rel->r_offset);
symval = ElfGetSymbolValue(elffile, ELF_R_SYM(rel->r_info));
# ifdef ELFDEBUG
ELFDEBUG("R_ALPHA_REFQUAD\t");
ELFDEBUG("dest64=%lx\t", dest64);
ELFDEBUG("*dest64=%8.8lx\t", *dest64);
# endif
*dest64 = symval + rel->r_addend + (*dest64); /* S + A + P */
# ifdef ELFDEBUG
ELFDEBUG("*dest64=%8.8lx\n", *dest64);
# endif
break;
case R_ALPHA_GPREL32:
{
dest64 = (unsigned long *)(secp + rel->r_offset);
dest32 = (unsigned int *)dest64;
# ifdef ELFDEBUG
ELFDEBUG("R_ALPHA_GPREL32 %s\t",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
ELFDEBUG("secp=%lx\t", secp);
ELFDEBUG("symval=%lx\t", symval);
ELFDEBUG("dest32=%lx\t", dest32);
ELFDEBUG("*dest32=%8.8x\t", *dest32);
# endif
symval += rel->r_addend;
symval = ((unsigned char *)symval) -
((unsigned char *)elffile->got);
# ifdef ELFDEBUG
ELFDEBUG("symval=%lx\t", symval);
# endif
if ((symval & 0xffffffff00000000) != 0x0000000000000000 &&
(symval & 0xffffffff00000000) != 0xffffffff00000000) {
FatalError("R_ALPHA_GPREL32 symval-got is too large for %s\n",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
}
*dest32 = symval;
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%x\n", *dest32);
# endif
break;
}
case R_ALPHA_GPRELLOW:
{
dest64 = (unsigned long *)(secp + rel->r_offset);
dest16 = (unsigned short *)dest64;
symval += rel->r_addend;
symval = ((unsigned char *)symval) -
((unsigned char *)elffile->got);
*dest16 = symval;
break;
}
case R_ALPHA_GPRELHIGH:
{
dest64 = (unsigned long *)(secp + rel->r_offset);
dest16 = (unsigned short *)dest64;
symval += rel->r_addend;
symval = ((unsigned char *)symval) -
((unsigned char *)elffile->got);
symval = ((long)symval >> 16) + ((symval >> 15) & 1);
if ((long)symval > 0x7fff || (long)symval < -(long)0x8000) {
FatalError
("R_ALPHA_GPRELHIGH symval-got is too large for %s:%lx\n",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)),
symval);
}
*dest16 = symval;
break;
}
case R_ALPHA_LITERAL:
{
ELFGotEntryPtr gotent;
dest32 = (unsigned int *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_ALPHA_LITERAL %s\t",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
ELFDEBUG("secp=%lx\t", secp);
ELFDEBUG("symval=%lx\t", symval);
ELFDEBUG("dest32=%lx\t", dest32);
ELFDEBUG("*dest32=%8.8x\t", *dest32);
# endif
for (gotent = elffile->got_entries; gotent; gotent = gotent->next) {
if (ELF_R_SYM(gotent->rel->r_info) == ELF_R_SYM(rel->r_info)
&& gotent->rel->r_addend == rel->r_addend)
break;
}
/* Set the address in the GOT */
if (gotent) {
*(unsigned long *)(elffile->got + gotent->offset) =
symval + rel->r_addend;
# ifdef ELFDEBUG
ELFDEBUG("Setting gotent[%x]=%lx\t",
gotent->offset, symval + rel->r_addend);
# endif
if ((gotent->offset & 0xffff0000) != 0)
FatalError("\nR_ALPHA_LITERAL offset %x too large\n",
gotent->offset);
(*dest32) |= (gotent->offset); /* The address part is always 0 */
} else {
unsigned long val;
/* S + A - P >> 2 */
val = ((symval + (rel->r_addend) - (Elf_Addr) dest32));
# ifdef ELFDEBUG
ELFDEBUG("S+A-P=%x\t", val);
# endif
if ((val & 0xffff0000) != 0xffff0000 &&
(val & 0xffff0000) != 0x00000000) {
ErrorF("\nR_ALPHA_LITERAL offset %x too large\n", val);
break;
}
val &= 0x0000ffff;
(*dest32) |= (val); /* The address part is always 0 */
}
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
break;
}
case R_ALPHA_GPDISP:
{
long offset;
dest32h = (unsigned int *)(secp + rel->r_offset);
dest32 = (unsigned int *)((secp + rel->r_offset) + rel->r_addend);
# ifdef ELFDEBUG
ELFDEBUG("R_ALPHA_GPDISP %s\t",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
ELFDEBUG("secp=%lx\t", secp);
ELFDEBUG("got=%lx\t", elffile->got);
ELFDEBUG("dest32=%lx\t", dest32);
ELFDEBUG("*dest32=%8.8x\t", *dest32);
ELFDEBUG("dest32h=%lx\t", dest32h);
ELFDEBUG("*dest32h=%8.8x\t", *dest32h);
# endif
if ((*dest32h >> 26) != 9 || (*dest32 >> 26) != 8) {
ErrorF("***Bad instructions in relocating %s\n",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
}
symval = (*dest32h & 0xffff) << 16 | (*dest32 & 0xffff);
symval = (symval ^ 0x80008000) - 0x80008000;
offset = ((unsigned char *)elffile->got -
(unsigned char *)dest32h);
# ifdef ELFDEBUG
ELFDEBUG("symval=%lx\t", symval);
ELFDEBUG("got-dest32=%lx\t", offset);
# endif
if ((offset >= 0x7fff8000L) || (offset < -0x80000000L)) {
FatalError("Offset overflow for R_ALPHA_GPDISP\n");
}
symval += (unsigned long)offset;
# ifdef ELFDEBUG
ELFDEBUG("symval=%lx\t", symval);
# endif
*dest32 = (*dest32 & 0xffff0000) | (symval & 0xffff);
*dest32h = (*dest32h & 0xffff0000) |
(((symval >> 16) + ((symval >> 15) & 1)) & 0xffff);
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8x\t", *dest32);
ELFDEBUG("*dest32h=%8.8x\n", *dest32h);
# endif
break;
}
case R_ALPHA_HINT:
dest32 = (unsigned int *)((secp + rel->r_offset) + rel->r_addend);
# ifdef ELFDEBUG
ELFDEBUG("R_ALPHA_HINT %s\t",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
ELFDEBUG("secp=%lx\t", secp);
ELFDEBUG("symval=%lx\t", symval);
ELFDEBUG("dest32=%lx\t", dest32);
ELFDEBUG("*dest32=%8.8x\t", *dest32);
# endif
# ifdef ELFDEBUG
ELFDEBUG("symval=%lx\t", symval);
# endif
symval -= (Elf_Addr) (((unsigned char *)dest32) + 4);
if (symval % 4) {
ErrorF("R_ALPHA_HINT bad alignment of offset\n");
}
symval = symval >> 2;
# ifdef ELFDEBUG
ELFDEBUG("symval=%lx\t", symval);
# endif
if (symval & 0xffff8000) {
# ifdef ELFDEBUG
ELFDEBUG("R_ALPHA_HINT symval too large\n");
# endif
}
*dest32 = (*dest32 & ~0x3fff) | (symval & 0x3fff);
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
break;
case R_ALPHA_GPREL16:
{
dest64 = (unsigned long *)(secp + rel->r_offset);
dest16 = (unsigned short *)dest64;
symval += rel->r_addend;
symval = ((unsigned char *)symval) -
((unsigned char *)elffile->got);
if ((long)symval > 0x7fff || (long)symval < -(long)0x8000) {
FatalError
("R_ALPHA_GPREL16 symval-got is too large for %s:%lx\n",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)),
symval);
}
*dest16 = symval;
break;
}
#endif /* alpha */
#if defined(__mc68000__)
case R_68K_32:
dest32 = (unsigned int *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_68K_32\t");
ELFDEBUG("secp=%x\t", secp);
ELFDEBUG("symval=%x\t", symval);
ELFDEBUG("r_addend=%x\t", rel->r_addend);
ELFDEBUG("dest32=%8.8x\t", dest32);
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
{
unsigned long val;
/* S + A */
val = symval + (rel->r_addend);
# ifdef ELFDEBUG
ELFDEBUG("S+A=%x\t", val);
# endif
*dest32 = val; /* S + A */
}
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
break;
case R_68K_PC32:
dest32 = (unsigned int *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_68K_PC32\t");
ELFDEBUG("secp=%x\t", secp);
ELFDEBUG("symval=%x\t", symval);
ELFDEBUG("r_addend=%x\t", rel->r_addend);
ELFDEBUG("dest32=%8.8x\t", dest32);
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
{
unsigned long val;
/* S + A - P */
val = symval + (rel->r_addend);
val -= *dest32;
# ifdef ELFDEBUG
ELFDEBUG("S+A=%x\t", val);
ELFDEBUG("S+A-P=%x\t", val + (*dest32) - (Elf_Addr) dest32);
# endif
*dest32 = val + (*dest32) - (Elf_Addr) dest32; /* S + A - P */
}
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
break;
#endif /* __mc68000__ */
#if defined(__powerpc__)
# if defined(PowerMAX_OS)
case R_PPC_DISP24: /* 11 */
dest32 = (unsigned long *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_PPC_DISP24 %s\t",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
ELFDEBUG("secp=%x\t", secp);
ELFDEBUG("symval=%x\t", symval);
ELFDEBUG("dest32=%x\t", dest32);
ELFDEBUG("*dest32=%8.8x\t", *dest32);
# endif
{
unsigned long val;
/* S + A - P >> 2 */
val = ((symval + (rel->r_addend) - (Elf_Addr) dest32));
# ifdef ELFDEBUG
ELFDEBUG("S+A-P=%x\t", val);
# endif
val = val >> 2;
if ((val & 0x3f000000) != 0x3f000000 &&
(val & 0x3f000000) != 0x00000000) {
# ifdef ELFDEBUG
ELFDEBUG("R_PPC_DISP24 offset %x too large\n", val << 2);
# endif
symval = ElfGetPltAddr(elffile, ELF_R_SYM(rel->r_info));
val = ((symval + (rel->r_addend) - (Elf_Addr) dest32));
# ifdef ELFDEBUG
ELFDEBUG("PLT offset is %x\n", val);
# endif
val = val >> 2;
if ((val & 0x3f000000) != 0x3f000000 &&
(val & 0x3f000000) != 0x00000000)
FatalError("R_PPC_DISP24 PLT offset %x too large\n",
val << 2);
}
val &= 0x00ffffff;
(*dest32) |= (val << 2); /* The address part is always 0 */
ppc_flush_icache(dest32);
}
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
break;
case R_PPC_16HU: /* 31 */
dest16 = (unsigned short *)(secp + rel->r_offset);
# ifdef ELFDEBUG
dest32 = (unsigned long *)(dest16 - 1);
# endif
# ifdef ELFDEBUG
ELFDEBUG("R_PPC_16HU\t");
ELFDEBUG("secp=%x\t", secp);
ELFDEBUG("symval=%x\t", symval);
ELFDEBUG("r_addend=%x\t", rel->r_addend);
ELFDEBUG("dest16=%x\t", dest16);
ELFDEBUG("*dest16=%8.8x\t", *dest16);
ELFDEBUG("dest32=%8.8x\t", dest32);
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
{
unsigned short val;
/* S + A */
val = ((symval + (rel->r_addend)) & 0xffff0000) >> 16;
# ifdef ELFDEBUG
ELFDEBUG("uhi16(S+A)=%x\t", val);
# endif
*dest16 = val; /* S + A */
ppc_flush_icache(dest16);
}
# ifdef ELFDEBUG
ELFDEBUG("*dest16=%8.8x\t", *dest16);
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
break;
case R_PPC_32: /* 32 */
dest32 = (unsigned long *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_PPC_32\t");
ELFDEBUG("secp=%x\t", secp);
ELFDEBUG("symval=%x\t", symval);
ELFDEBUG("r_addend=%x\t", rel->r_addend);
ELFDEBUG("dest32=%8.8x\t", dest32);
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
{
unsigned long val;
/* S + A */
val = symval + (rel->r_addend);
# ifdef ELFDEBUG
ELFDEBUG("S+A=%x\t", val);
# endif
*dest32 = val; /* S + A */
ppc_flush_icache(dest32);
}
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
break;
case R_PPC_32UA: /* 33 */
dest32 = (unsigned long *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_PPC_32UA\t");
ELFDEBUG("secp=%x\t", secp);
ELFDEBUG("symval=%x\t", symval);
ELFDEBUG("r_addend=%x\t", rel->r_addend);
ELFDEBUG("dest32=%8.8x\t", dest32);
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
{
unsigned long val;
unsigned char *dest8 = (unsigned char *)dest32;
/* S + A */
val = symval + (rel->r_addend);
# ifdef ELFDEBUG
ELFDEBUG("S+A=%x\t", val);
# endif
*dest8++ = (val & 0xff000000) >> 24;
*dest8++ = (val & 0x00ff0000) >> 16;
*dest8++ = (val & 0x0000ff00) >> 8;
*dest8++ = (val & 0x000000ff);
ppc_flush_icache(dest32);
}
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
break;
case R_PPC_16H: /* 34 */
dest16 = (unsigned short *)(secp + rel->r_offset);
# ifdef ELFDEBUG
dest32 = (unsigned long *)(dest16 - 1);
# endif
# ifdef ELFDEBUG
ELFDEBUG("R_PPC_16H\t");
ELFDEBUG("secp=%x\t", secp);
ELFDEBUG("symbol=%s\t",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
ELFDEBUG("symval=%x\t", symval);
ELFDEBUG("r_addend=%x\t", rel->r_addend);
ELFDEBUG("dest16=%x\t", dest16);
ELFDEBUG("*dest16=%8.8x\t", *dest16);
ELFDEBUG("dest32=%8.8x\t", dest32);
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
{
unsigned short val;
unsigned short loval;
/* S + A */
val = ((symval + (rel->r_addend)) & 0xffff0000) >> 16;
loval = (symval + (rel->r_addend)) & 0xffff;
if (loval & 0x8000) {
/*
* This is hi16(), instead of uhi16(). Because of this,
* if the lo16() will produce a negative offset, then
* we have to increment this part of the address to get
* the correct final result.
*/
val++;
}
# ifdef ELFDEBUG
ELFDEBUG("hi16(S+A)=%x\t", val);
# endif
*dest16 = val; /* S + A */
ppc_flush_icache(dest16);
}
# ifdef ELFDEBUG
ELFDEBUG("*dest16=%8.8x\t", *dest16);
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
break;
case R_PPC_16L: /* 35 */
dest16 = (unsigned short *)(secp + rel->r_offset);
# ifdef ELFDEBUG
dest32 = (unsigned long *)(dest16 - 1);
# endif
# ifdef ELFDEBUG
ELFDEBUG("R_PPC_16L\t");
ELFDEBUG("secp=%x\t", secp);
ELFDEBUG("symval=%x\t", symval);
ELFDEBUG("r_addend=%x\t", rel->r_addend);
ELFDEBUG("dest16=%x\t", dest16);
ELFDEBUG("*dest16=%8.8x\t", *dest16);
ELFDEBUG("dest32=%8.8x\t", dest32);
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
{
unsigned short val;
/* S + A */
val = (symval + (rel->r_addend)) & 0xffff;
# ifdef ELFDEBUG
ELFDEBUG("lo16(S+A)=%x\t", val);
# endif
*dest16 = val; /* S + A */
ppc_flush_icache(dest16);
}
# ifdef ELFDEBUG
ELFDEBUG("*dest16=%8.8x\t", *dest16);
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
break;
# else /* PowerMAX_OS */
/* Linux PPC */
case R_PPC_ADDR32: /* 1 */
dest32 = (unsigned int *)(secp + rel->r_offset);
symval = ElfGetSymbolValue(elffile, ELF_R_SYM(rel->r_info));
# ifdef ELFDEBUG
ELFDEBUG("R_PPC_ADDR32\t");
ELFDEBUG("secp=%x\t", secp);
ELFDEBUG("symval=%x\t", symval);
ELFDEBUG("r_addend=%x\t", rel->r_addend);
ELFDEBUG("dest32=%8.8x\t", dest32);
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
{
unsigned long val;
/* S + A */
val = symval + (rel->r_addend);
# ifdef ELFDEBUG
ELFDEBUG("S+A=%x\t", val);
# endif
*dest32 = val; /* S + A */
ppc_flush_icache(dest32);
}
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
break;
case R_PPC_ADDR16_LO: /* 4 */
dest16 = (unsigned short *)(secp + rel->r_offset);
# ifdef ELFDEBUG
dest32 = (unsigned long *)(dest16 - 1);
# endif
# ifdef ELFDEBUG
ELFDEBUG("R_PPC_ADDR16_LO\t");
ELFDEBUG("secp=%x\t", secp);
ELFDEBUG("symval=%x\t", symval);
ELFDEBUG("r_addend=%x\t", rel->r_addend);
ELFDEBUG("dest16=%x\t", dest16);
ELFDEBUG("*dest16=%8.8x\t", *dest16);
# endif
{
unsigned short val;
/* S + A */
val = (symval + (rel->r_addend)) & 0xffff;
# ifdef ELFDEBUG
ELFDEBUG("lo16(S+A)=%x\t", val);
# endif
*dest16 = val; /* S + A */
ppc_flush_icache(dest16);
}
# ifdef ELFDEBUG
ELFDEBUG("*dest16=%8.8x\t", *dest16);
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
break;
case R_PPC_ADDR16_HA: /* 6 */
dest16 = (unsigned short *)(secp + rel->r_offset);
# ifdef ELFDEBUG
dest32 = (unsigned long *)(dest16 - 1);
# endif
# ifdef ELFDEBUG
ELFDEBUG("R_PPC_ADDR16_HA\t");
ELFDEBUG("secp=%x\t", secp);
ELFDEBUG("symval=%x\t", symval);
ELFDEBUG("r_addend=%x\t", rel->r_addend);
ELFDEBUG("dest16=%x\t", dest16);
ELFDEBUG("*dest16=%8.8x\t", *dest16);
# endif
{
unsigned short val;
unsigned short loval;
/* S + A */
val = ((symval + (rel->r_addend)) & 0xffff0000) >> 16;
loval = (symval + (rel->r_addend)) & 0xffff;
if (loval & 0x8000) {
/*
* This is hi16(), instead of uhi16(). Because of this,
* if the lo16() will produce a negative offset, then
* we have to increment this part of the address to get
* the correct final result.
*/
val++;
}
# ifdef ELFDEBUG
ELFDEBUG("hi16(S+A)=%x\t", val);
# endif
*dest16 = val; /* S + A */
ppc_flush_icache(dest16);
}
# ifdef ELFDEBUG
ELFDEBUG("*dest16=%8.8x\t", *dest16);
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
break;
case R_PPC_REL24: /* 10 */
dest32 = (unsigned int *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_PPC_REL24 %s\t",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
ELFDEBUG("secp=%x\t", secp);
ELFDEBUG("symval=%x\t", symval);
ELFDEBUG("dest32=%x\t", dest32);
ELFDEBUG("*dest32=%8.8x\t", *dest32);
# endif
{
unsigned long val;
/* S + A - P >> 2 */
val = ((symval + (rel->r_addend) - (Elf_Addr) dest32));
# ifdef ELFDEBUG
ELFDEBUG("S+A-P=%x\t", val);
# endif
val = val >> 2;
if ((val & 0x3f000000) != 0x3f000000 &&
(val & 0x3f000000) != 0x00000000) {
# ifdef ELFDEBUG
ELFDEBUG("R_PPC_REL24 offset %x too large\n", val << 2);
# endif
symval = ElfGetPltAddr(elffile, ELF_R_SYM(rel->r_info));
val = ((symval + (rel->r_addend) - (Elf_Addr) dest32));
# ifdef ELFDEBUG
ELFDEBUG("PLT offset is %x\n", val);
# endif
val = val >> 2;
if ((val & 0x3f000000) != 0x3f000000 &&
(val & 0x3f000000) != 0x00000000)
FatalError("R_PPC_REL24 PLT offset %x too large\n",
val << 2);
}
val &= 0x00ffffff;
(*dest32) |= (val << 2); /* The address part is always 0 */
ppc_flush_icache(dest32);
}
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
break;
case R_PPC_REL32: /* 26 */
dest32 = (unsigned int *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_PPC_REL32\t");
ELFDEBUG("secp=%x\t", secp);
ELFDEBUG("symval=%x\t", symval);
ELFDEBUG("r_addend=%x\t", rel->r_addend);
ELFDEBUG("dest32=%8.8x\t", dest32);
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
{
unsigned long val;
/* S + A - P */
val = symval + (rel->r_addend);
val -= *dest32;
# ifdef ELFDEBUG
ELFDEBUG("S+A=%x\t", val);
ELFDEBUG("S+A-P=%x\t", val + (*dest32) - (Elf_Addr) dest32);
# endif
*dest32 = val + (*dest32) - (Elf_Addr) dest32; /* S + A - P */
ppc_flush_icache(dest32);
}
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8x\n", *dest32);
# endif
break;
# endif /* PowerMAX_OS */
#endif /* __powerpc__ */
#ifdef __sparc__
case R_SPARC_NONE: /* 0 */
break;
case R_SPARC_8: /* 1 */
dest8 = (unsigned char *)(secp + rel->r_offset);
symval += rel->r_addend;
*dest8 = symval;
break;
case R_SPARC_16: /* 2 */
dest16 = (unsigned short *)(secp + rel->r_offset);
symval += rel->r_addend;
*dest16 = symval;
break;
case R_SPARC_32: /* 3 */
case R_SPARC_UA32: /* 23 */
dest32 = (unsigned int *)(secp + rel->r_offset);
symval += rel->r_addend;
((unsigned char *)dest32)[0] = (unsigned char)(symval >> 24);
((unsigned char *)dest32)[1] = (unsigned char)(symval >> 16);
((unsigned char *)dest32)[2] = (unsigned char)(symval >> 8);
((unsigned char *)dest32)[3] = (unsigned char)(symval);
break;
case R_SPARC_GLOB_DAT: /* 20 */
case R_SPARC_64: /* 32 */
dest64 = (unsigned long *)(secp + rel->r_offset);
symval += rel->r_addend;
*dest64 = symval;
break;
case R_SPARC_DISP8: /* 4 */
dest8 = (unsigned char *)(secp + rel->r_offset);
symval += rel->r_addend;
*dest8 = (symval - (Elf_Addr) dest8);
break;
case R_SPARC_DISP16: /* 5 */
dest16 = (unsigned short *)(secp + rel->r_offset);
symval += rel->r_addend;
*dest16 = (symval - (Elf_Addr) dest16);
break;
case R_SPARC_DISP32: /* 6 */
dest32 = (unsigned int *)(secp + rel->r_offset);
symval += rel->r_addend;
*dest32 = (symval - (Elf_Addr) dest32);
break;
case R_SPARC_WDISP30: /* 7 */
dest32 = (unsigned int *)(secp + rel->r_offset);
symval += rel->r_addend;
*dest32 = ((*dest32 & 0xc0000000) |
(((symval - (Elf_Addr) dest32) >> 2) & 0x3fffffff));
break;
case R_SPARC_HI22: /* 9 */
dest32 = (unsigned int *)(secp + rel->r_offset);
symval += rel->r_addend;
*dest32 = (*dest32 & 0xffc00000) | (symval >> 10);
break;
case R_SPARC_LO10: /* 12 */
dest32 = (unsigned int *)(secp + rel->r_offset);
symval += rel->r_addend;
*dest32 = (*dest32 & ~0x3ff) | (symval & 0x3ff);
break;
case R_SPARC_COPY: /* 19 */
/* Fix your code... I'd rather dish out an error here
* so people will not link together PIC and non-PIC
* code into a final driver object file.
*/
ErrorF("Elf_RelocateEntry():"
" Copy relocs not supported on Sparc.\n");
break;
case R_SPARC_JMP_SLOT: /* 21 */
dest32 = (unsigned int *)(secp + rel->r_offset);
/* Before we change it the PLT entry looks like:
*
* pltent: sethi %hi(rela_plt_offset), %g1
* b,a PLT0
* nop
*
* We change it into:
*
* pltent: sethi %hi(rela_plt_offset), %g1
* sethi %hi(symval), %g1
* jmp %g1 + %lo(symval), %g0
*/
symval += rel->r_addend;
dest32[2] = 0x81c06000 | (symval & 0x3ff);
__asm __volatile("flush %0 + 0x8"::"r"(dest32));
dest32[1] = 0x03000000 | (symval >> 10);
__asm __volatile("flush %0 + 0x4"::"r"(dest32));
break;
case R_SPARC_RELATIVE: /* 22 */
dest64 = (unsigned long *)(secp + rel->r_offset);
*dest64 = (unsigned long)secp + rel->r_addend;
break;
#endif /*__sparc__*/
#ifdef __ia64__
case R_IA64_NONE:
break;
case R_IA64_LTOFF_FPTR22:
if (rel->r_addend)
FatalError("\nAddend for R_IA64_LTOFF_FPTR22 not supported\n");
# ifdef ELFDEBUG
ELFDEBUG("opd=%016lx.%016lx\n",
((long *)symval)[0], ((long *)symval)[1]);
# endif
/* FALLTHROUGH */
case R_IA64_LTOFF22:
#ifndef IA64_LDX_OPTIMIZATION
case R_IA64_LTOFF22X: /* If not implementing LDXMOV optimization treat LTOFF22X as LTOFF22 */
#endif
{
ELFGotEntryPtr gotent;
dest128 = (unsigned long *)(secp + (rel->r_offset & ~3));
# ifdef ELFDEBUG
ELFDEBUG("%s %s\t", ELF_R_TYPE(rel->r_info) == R_IA64_LTOFF22 ?
"R_IA64_LTOFF22" : "R_IA64_LTOFF_FPTR22",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
ELFDEBUG("secp=%lx\t", secp);
ELFDEBUG("symval=%lx\t", symval);
ELFDEBUG("dest128=%lx\t", dest128);
ELFDEBUG("slot=%d\n", rel->r_offset & 3);
ELFDEBUG("*dest128=[%016lx%016lx]\n", dest128[1], dest128[0]);
# endif
for (gotent = elffile->got_entries; gotent; gotent = gotent->next) {
if (ELF_R_SYM(gotent->rel->r_info) == ELF_R_SYM(rel->r_info)
&& gotent->rel->r_addend == rel->r_addend)
break;
}
/* Set the address in the GOT */
if (gotent) {
*(unsigned long *)(elffile->got + gotent->offset) =
symval + rel->r_addend;
# ifdef ELFDEBUG
ELFDEBUG("Setting gotent[%x]=%lx\n",
gotent->offset, symval + rel->r_addend);
# endif
if ((gotent->offset & 0xffe00000) != 0)
FatalError("\nR_IA64_LTOFF22 offset %x too large\n",
gotent->offset);
IA64InstallReloc(dest128, rel->r_offset & 3, IA64_OPND_IMM22,
gotent->offset);
} else
FatalError("\nCould not find GOT entry\n");
}
break;
case R_IA64_PCREL21B:
{
ELFPltEntryPtr pltent;
dest128 = (unsigned long *)(secp + (rel->r_offset & ~3));
# ifdef ELFDEBUG
ELFDEBUG("R_IA64_PCREL21B %s\t",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
ELFDEBUG("secp=%lx\t", secp);
ELFDEBUG("symval=%lx\t", symval);
ELFDEBUG("opd=%lx.%lx\t", ((long *)symval)[0],
((long *)symval)[1]);
ELFDEBUG("dest128=%lx\t", dest128);
ELFDEBUG("slot=%d\n", rel->r_offset & 3);
ELFDEBUG("*dest128=[%016lx%016lx]\n", dest128[1], dest128[0]);
# endif
if (rel->r_addend)
FatalError("\nAddend for PCREL21B not supported\n");
if (((long *)symval)[1] == (long)elffile->got
&& (((unsigned long)dest128 - ((unsigned long *)symval)[0]) +
0x2000000 < 0x4000000)) {
/* We can save the travel through PLT */
IA64InstallReloc(dest128, rel->r_offset & 3, IA64_OPND_TGT25C,
((unsigned long *)symval)[0] -
(unsigned long)dest128);
break;
}
for (pltent = elffile->plt_entries; pltent; pltent = pltent->next) {
if (ELF_R_SYM(pltent->rel->r_info) == ELF_R_SYM(rel->r_info)
&& pltent->rel->r_addend == rel->r_addend)
break;
}
/* Set the address in the PLT */
if (pltent == NULL)
FatalError("\nCould not find PLT entry\n");
else {
unsigned long *p =
(unsigned long *)(elffile->plt + pltent->offset);
unsigned long r =
(unsigned long)symval - (unsigned long)elffile->got;
if (r + 0x200000 >= 0x400000) {
/* Too far from gp to use the official function descriptor,
* so we have to make a local one.
*/
r = pltent->gotoffset;
memcpy(elffile->got + r, (char *)symval, 16);
}
/* [MMI] addl r15=NNN,r1;; ld8 r16=[r15],8; mov r14=r1;; */
p[0] = 0x410024000200780bUL;
p[1] = 0x84000801c028303cUL;
/* [MIB] ld8 r1=[r15]; mov b6=r16; br.few b6;; */
p[2] = 0x806010181e000811UL;
p[3] = 0x0080006000038004UL;
IA64InstallReloc(p, 0, IA64_OPND_IMM22, r);
IA64InstallReloc(dest128, rel->r_offset & 3, IA64_OPND_TGT25C,
(unsigned long)p - (unsigned long)dest128);
}
}
break;
case R_IA64_FPTR64LSB:
dest64 = (unsigned long *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_IA64_FPTR64LSB %s\t",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
ELFDEBUG("secp=%lx\t", secp);
ELFDEBUG("symval=%lx\t", symval);
ELFDEBUG("dest64=%lx\t", dest64);
ELFDEBUG("opd=%016lx.%016lx\n", ((long *)symval)[0],
((long *)symval)[1]);
# endif
if (rel->r_addend)
FatalError("\nAddend not supported for R_IA64_FPTR64LSB\n");
*dest64 = symval;
ia64_flush_cache(dest64);
break;
case R_IA64_DIR64LSB:
dest64 = (unsigned long *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_IA64_DIR64LSB %s\t",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
ELFDEBUG("secp=%lx\t", secp);
ELFDEBUG("symval=%lx\t", symval);
ELFDEBUG("dest64=%lx\n", dest64);
# endif
*dest64 = symval + rel->r_addend;
ia64_flush_cache(dest64);
break;
case R_IA64_PCREL64LSB:
dest64 = (unsigned long *)(secp + rel->r_offset);
#ifdef ELFDEBUG
ELFDEBUG("R_IA64_PCREL64LSB %s\t",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
ELFDEBUG("secp=%lx\t", secp);
ELFDEBUG("symval=%lx\t", symval);
ELFDEBUG("dest64=%lx\n", dest64);
#endif
*dest64 = symval + rel->r_addend - (unsigned long)dest64;
break;
case R_IA64_GPREL22:
dest128 = (unsigned long *)(secp + (rel->r_offset & ~3));
# ifdef ELFDEBUG
ELFDEBUG("R_IA64_GPREL22 %s\t",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
ELFDEBUG("secp=%lx\t", secp);
ELFDEBUG("symval=%lx\t", symval);
ELFDEBUG("dest128=%lx\t", dest128);
ELFDEBUG("slot=%d\n", rel->r_offset & 3);
ELFDEBUG("*dest128=[%016lx%016lx]\n", dest128[1], dest128[0]);
# endif
IA64InstallReloc(dest128, rel->r_offset & 3, IA64_OPND_IMM22,
symval + rel->r_addend - (long)elffile->got);
break;
#ifdef IA64_LDX_OPTIMIZATION
case R_IA64_LTOFF22X:
{
ELFGotEntryPtr gotent;
long gp_offset = symval + rel->r_addend - (long)elffile->got;
dest128 = (unsigned long *)(secp + (rel->r_offset & ~3));
# ifdef ELFDEBUG
ELFDEBUG("R_IA64_LTOFF22X %s\t",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
ELFDEBUG("secp=%lx\t", secp);
ELFDEBUG("symval=%lx\t", symval);
ELFDEBUG("dest128=%lx\t", dest128);
ELFDEBUG("slot=%d\n", rel->r_offset & 3);
# endif
if (gp_offset << 42 >> 42 != gp_offset) {
/* Offset is too large for LTOFF22X,
* fallback to using GOT lookup, e.g. LTOFF22.
* Note: LDXMOV will fail the same test and will be ignored. */
# ifdef ELFDEBUG
ELFDEBUG("gp_offset=%ld too large, using GOT instead (LTOFF22)\n", gp_offset);
# endif
for (gotent = elffile->got_entries; gotent;
gotent = gotent->next) {
if (ELF_R_SYM(gotent->rel->r_info) ==
ELF_R_SYM(rel->r_info)
&& gotent->rel->r_addend == rel->r_addend)
break;
}
/* Set the address in the GOT */
if (gotent) {
*(unsigned long *)(elffile->got + gotent->offset) =
symval + rel->r_addend;
# ifdef ELFDEBUG
ELFDEBUG("Setting gotent[%x]=%lx\n", gotent->offset,
symval + rel->r_addend);
# endif
if ((gotent->offset & 0xffe00000) != 0)
FatalError("\nR_IA64_LTOFF22 offset %x too large\n",
gotent->offset);
} else {
FatalError("\nCould not find GOT entry\n");
}
gp_offset = gotent->offset; /* Use GOT lookup */
} else {
# ifdef ELFDEBUG
ELFDEBUG("using gp_offset=%ld (LTOFF22X)", gp_offset);
# endif
}
IA64InstallReloc(dest128, rel->r_offset & 3, IA64_OPND_IMM22,
gp_offset);
}
break;
#endif
case R_IA64_LDXMOV:
# ifdef ELFDEBUG
ELFDEBUG("R_IA64_LDXMOV %s\t",
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
# endif
#ifdef IA64_LDX_OPTIMIZATION
{
long gp_offset = symval + rel->r_addend - (long)elffile->got;
dest128 = (unsigned long *)(secp + (rel->r_offset & ~3));
if (gp_offset << 42 >> 42 != gp_offset) {
/* Offset is too large for LTOFF22X, ignore this relocation */
# ifdef ELFDEBUG
ELFDEBUG("offset = %ld too large, ignoring\n", gp_offset);
# endif
} else {
# ifdef ELFDEBUG
ELFDEBUG("secp=%lx\t", secp);
ELFDEBUG("symval=%lx\t", symval);
ELFDEBUG("dest128=%lx\t", dest128);
ELFDEBUG("slot=%d\n", rel->r_offset & 3);
ELFDEBUG("offset=%ld\n", gp_offset);
ELFDEBUG("*dest128=[%016lx%016lx]\n", dest128[1], dest128[0]);
# endif
IA64InstallReloc(dest128, rel->r_offset & 3, IA64_OPND_LDXMOV,
0);
}
}
#endif
break;
#endif /*__ia64__*/
#if defined(__arm__)
case R_ARM_ABS32:
dest32 = (unsigned int *)(secp + rel->r_offset);
# ifdef ELFDEBUG
ELFDEBUG("R_ARM_ABS32\t");
ELFDEBUG("dest32=%x\t", dest32);
ELFDEBUG("*dest32=%8.8lx\t", *dest32);
# endif
*dest32 = symval + (*dest32); /* S + A */
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8lx\n", *dest32);
# endif
break;
case R_ARM_REL32:
dest32 = (unsigned int *)(secp + rel->r_offset);
# ifdef ELFDEBUG
{
char *namestr;
ELFDEBUG("R_ARM_REL32 %s\t",
namestr =
ElfGetSymbolName(elffile, ELF_R_SYM(rel->r_info)));
xf86loaderfree(namestr);
ELFDEBUG("secp=%x\t", secp);
ELFDEBUG("symval=%lx\t", symval);
ELFDEBUG("dest32=%x\t", dest32);
ELFDEBUG("*dest32=%8.8lx\t", *dest32);
}
# endif
*dest32 = symval + (*dest32) - (Elf_Addr) dest32; /* S + A - P */
# ifdef ELFDEBUG
ELFDEBUG("*dest32=%8.8lx\n", *dest32);
# endif
break;
case R_ARM_PC24:
{
unsigned long val;
dest32 = (unsigned int *)(secp + rel->r_offset);
val = (*dest32 & 0x00ffffff) << 2;
val = symval - (unsigned long)dest32 + val;
val >>= 2;
*dest32 = (*dest32 & 0xff000000) | (val & 0x00ffffff);
#ifdef NOTYET
arm_flush_cache(dest32);
#endif
}
break;
#endif /* (__arm__) */
default:
ErrorF("Elf_RelocateEntry() Unsupported relocation type %d\n",
(int)ELF_R_TYPE(rel->r_info));
break;
}
return 0;
}
static ELFRelocPtr
ELFCollectRelocations(elffile, index)
ELFModulePtr elffile;
int index; /* The section to use as relocation data */
{
int i, numrel;
Elf_Shdr *sect = &(elffile->sections[index]);
Elf_Rel_t *rel = (Elf_Rel_t *) elffile->saddr[index];
ELFRelocPtr reloc_head = NULL;
ELFRelocPtr tmp;
numrel = sect->sh_size / sect->sh_entsize;
for (i = 0; i < numrel; i++) {
#if defined(__alpha__)
if (ELF_R_TYPE(rel[i].r_info) == R_ALPHA_LITERAL) {
ElfAddGOT(elffile, &rel[i]);
}
#endif
#if defined(__ia64__)
if (ELF_R_TYPE(rel[i].r_info) == R_IA64_LTOFF22
|| ELF_R_TYPE(rel[i].r_info) == R_IA64_LTOFF22X
|| ELF_R_TYPE(rel[i].r_info) == R_IA64_LTOFF_FPTR22) {
ElfAddGOT(elffile, &rel[i]);
}
if (ELF_R_TYPE(rel[i].r_info) == R_IA64_PCREL21B) {
ElfAddPLT(elffile, &rel[i]);
}
if (ELF_R_TYPE(rel[i].r_info) == R_IA64_LTOFF_FPTR22
|| ELF_R_TYPE(rel[i].r_info) == R_IA64_FPTR64LSB) {
Elf_Sym *syms = (Elf_Sym *) elffile->saddr[elffile->symndx];
if (ELF_ST_BIND(syms[ELF_R_SYM(rel[i].r_info)].st_info) ==
STB_LOCAL) {
ElfAddOPD(elffile, ELF_R_SYM(rel[i].r_info), NULL);
}
}
#endif
tmp = ElfDelayRelocation(elffile, sect->sh_info, &(rel[i]));
tmp->next = reloc_head;
reloc_head = tmp;
}
return reloc_head;
}
/*
* ELF_GetSymbols()
*
* add the symbols to the symbol table maintained by the loader.
*/
static LOOKUP *
ELF_GetSymbols(ELFModulePtr elffile, unsigned short **psecttable)
{
Elf_Sym *syms;
Elf_Shdr *sect;
int i, l, numsyms;
LOOKUP *lookup, *p;
ELFCommonPtr tmp;
unsigned short *secttable;
syms = elffile->symtab;
sect = &(elffile->sections[elffile->symndx]);
numsyms = sect->sh_size / sect->sh_entsize;
if ((lookup = xf86loadermalloc((numsyms + 1) * sizeof(LOOKUP))) == NULL)
return 0;
if ((secttable =
xf86loadercalloc(sizeof(unsigned short), (numsyms + 1))) == NULL) {
xf86loaderfree(lookup);
return 0;
}
*psecttable = secttable;
for (i = 0, l = 0; i < numsyms; i++) {
#ifdef ELFDEBUG
ELFDEBUG("value=%lx\tsize=%lx\tBIND=%x\tTYPE=%x\tndx=%x\t%s\n",
(unsigned long)syms[i].st_value,
(unsigned long)syms[i].st_size,
ELF_ST_BIND(syms[i].st_info), ELF_ST_TYPE(syms[i].st_info),
syms[i].st_shndx, ElfGetString(elffile, syms[i].st_name));
#endif
if (ELF_ST_BIND(syms[i].st_info) == STB_LOCAL)
/* Don't add static symbols to the symbol table */
continue;
switch (ELF_ST_TYPE(syms[i].st_info)) {
case STT_OBJECT:
case STT_FUNC:
case STT_SECTION:
case STT_NOTYPE:
switch (syms[i].st_shndx) {
case SHN_ABS:
ErrorF("ELF_GetSymbols() Don't know how to handle SHN_ABS\n");
break;
case SHN_COMMON:
#ifdef ELFDEBUG
ELFDEBUG("Adding COMMON space for %s\n",
ElfGetString(elffile, syms[i].st_name));
#endif
if (!LoaderHashFind(ElfGetString(elffile, syms[i].st_name))) {
tmp = ElfAddCOMMON(&(syms[i]));
if (tmp) {
tmp->next = listCOMMON;
listCOMMON = tmp;
}
}
break;
case SHN_UNDEF:
/*
* UNDEF will get resolved later, so the value
* doesn't really matter here.
*/
/* since we don't know the value don't advertise the symbol */
break;
default:
lookup[l].symName =
xf86loaderstrdup(ElfGetString
(elffile, syms[i].st_name));
lookup[l].offset = (funcptr) syms[i].st_value;
secttable[l] = syms[i].st_shndx;
#ifdef ELFDEBUG
ELFDEBUG("Adding symbol %lx(%d) %s\n",
(unsigned long)lookup[l].offset, secttable[l],
lookup[l].symName);
#endif
#ifdef __ia64__
if (ELF_ST_TYPE(syms[i].st_info) == STT_FUNC) {
ElfAddOPD(elffile, -1, &lookup[l]);
}
#endif
l++;
break;
}
break;
case STT_FILE:
case STT_LOPROC:
case STT_HIPROC:
/* Skip this type */
#ifdef ELFDEBUG
ELFDEBUG("Skipping TYPE %d %s\n",
ELF_ST_TYPE(syms[i].st_info),
ElfGetString(elffile, syms[i].st_name));
#endif
break;
default:
ErrorF("ELF_GetSymbols(): Unepected symbol type %d\n",
ELF_ST_TYPE(syms[i].st_info));
break;
}
}
lookup[l].symName = NULL; /* Terminate the list */
/*
* Remove the ELF symbols that will show up in every object module.
*/
for (i = 0, p = lookup; p->symName; i++, p++) {
while (!strcmp(lookup[i].symName, ".text")
|| !strcmp(lookup[i].symName, ".data")
|| !strcmp(lookup[i].symName, ".bss")
|| !strcmp(lookup[i].symName, ".comment")
|| !strcmp(lookup[i].symName, ".note")
) {
memmove(&(lookup[i]), &(lookup[i + 1]), (l - i) * sizeof(LOOKUP));
memmove(&(secttable[i]), &(secttable[i + 1]),
(l-- - i) * sizeof(unsigned short));
}
}
return lookup;
}
#define SecOffset(index) elffile->sections[index].sh_offset
#define SecSize(index) elffile->sections[index].sh_size
#define SecAlign(index) elffile->sections[index].sh_addralign
#define SecType(index) elffile->sections[index].sh_type
#define SecFlags(index) elffile->sections[index].sh_flags
#define SecInfo(index) elffile->sections[index].sh_info
#define AdjustSize(i) \
if (!pass) { \
if (SecAlign(i) > *maxalign) \
*maxalign = SecAlign(i); \
*totalsize += (SecAlign(i) - 1); \
*totalsize &= ~(SecAlign(i) - 1); \
*totalsize += SecSize(i); \
continue; \
} do { } while (0)
/*
* ELFCollectSections
*
* Do the work required to load each section into memory.
*/
static void
ELFCollectSections(ELFModulePtr elffile, int pass, int *totalsize,
int *maxalign)
{
int i;
int j;
/*
* Find and identify all of the Sections
*/
j = elffile->lsectidx;
for (i = 1; i < elffile->numsh; i++) {
int flags = 0;
char *name = ElfGetSectionName(elffile, elffile->sections[i].sh_name);
#if defined(__alpha__) || defined(__ia64__)
if (!strcmp(name, ".got") /*Isn't there a more generic way to do this? */
# if defined(__ia64__)
|| !strcmp(name, ".plt") || !strcmp(name, ".IA_64.unwind_info")
# endif
)
continue;
#endif
switch (SecType(i)) {
case SHT_STRTAB:
if (!strcmp(name, ".shstrtab")) /* already loaded */
continue;
if (!strcmp(name, ".stabstr")) /* ignore debug info */
continue;
if (!strcmp(name, ".stab.indexstr")) /* ignore more debug info */
continue;
case SHT_SYMTAB:
if (pass)
continue;
flags = LOADED_SECTION;
flags |= RELOC_SECTION;
break;
case SHT_REL:
case SHT_RELA:
if (pass)
continue;
if (!(SecFlags(SecInfo(i)) & SHF_ALLOC))
continue;
#ifdef __ia64__
if (SecType(SecInfo(i)) == SHT_IA_64_UNWIND)
continue;
#endif
flags = LOADED_SECTION;
flags |= RELOC_SECTION;
break;
case SHT_PROGBITS:
flags |= LOADED_SECTION;
case SHT_NOBITS:
if (!(elffile->sections[i].sh_flags & SHF_ALLOC))
continue;
AdjustSize(i);
break;
default:
#ifdef ELFDEBUG
if (pass)
ELFDEBUG("ELF: Not loading %s\n", name);
#endif
continue;
}
elffile->lsection = xf86loaderrealloc(elffile->lsection,
(j + 1) * sizeof(LoadSection));
if (!(flags & RELOC_SECTION)) {
if (flags & LOADED_SECTION) {
elffile->lsection[j].saddr /* sect. contains data */
= ELFLoaderSectToMem(elffile, SecAlign(i),
SecOffset(i), SecSize(i), name);
} else {
if (SecSize(i))
elffile->lsection[j].saddr
= ELFLoaderSectCalloc(elffile, SecAlign(i),
SecSize(i));
else
elffile->lsection[j].saddr = NULL;
}
} else {
elffile->lsection[j].saddr =
(Elf_Sym *) _LoaderFileToMem(elffile->fd, SecOffset(i),
SecSize(i), name);
}
elffile->saddr[i] = elffile->lsection[j].saddr;
#ifdef ELFDEBUG
ELFDEBUG("%s starts at %p size: %lx\n",
name, elffile->saddr[i], (unsigned long)SecSize(i));
#endif
elffile->lsection[j].name = name;
elffile->lsection[j].ndx = i;
elffile->lsection[j].size = SecSize(i);
elffile->lsection[j].flags = flags;
switch (SecType(i)) {
#if defined(linux) || defined(__OpenBSD__)
case SHT_PROGBITS:
{
unsigned long page_size = getpagesize();
unsigned long round;
round = (unsigned long)elffile->lsection[j].saddr & (page_size -1);
mprotect( (char *)elffile->lsection[j].saddr - round,
SecSize(i) + round, PROT_READ | PROT_WRITE | PROT_EXEC);
}
break;
#endif
case SHT_SYMTAB:
elffile->symtab = (Elf_Sym *) elffile->saddr[i];
elffile->symndx = i;
break;
case SHT_STRTAB:
elffile->straddr = elffile->saddr[i];
elffile->strsize = elffile->lsection[j].size;
elffile->strndx = i;
break;
default:
break;
}
elffile->lsectidx = ++j;
}
}
/*
* Public API for the ELF implementation of the loader.
*/
void *
ELFLoadModule(loaderPtr modrec, int elffd, LOOKUP **ppLookup)
{
ELFModulePtr elffile;
Elf_Ehdr *header;
ELFRelocPtr elf_reloc, tail;
void *v;
LDRModulePtr elfmod;
int totalsize, maxalign, i;
unsigned short *secttable;
LOOKUP *pLookup;
ldrCommons = 0;
nCommons = 0;
#ifdef ELFDEBUG
ELFDEBUG("Loading %s %s\n", modrec->name, modrec->cname);
#endif
if ((elffile = xf86loadercalloc(1, sizeof(ELFModuleRec))) == NULL) {
ErrorF("Unable to allocate ELFModuleRec\n");
return NULL;
}
elffile->handle = modrec->handle;
elffile->module = modrec->module;
elffile->fd = elffd;
v = elffile->funcs = modrec->funcs;
/*
* Get the ELF header
*/
elffile->header =
(Elf_Ehdr *) _LoaderFileToMem(elffd, 0, sizeof(Elf_Ehdr),
"header");
header = (Elf_Ehdr *) elffile->header;
/*
* Get the section table
*/
elffile->numsh = header->e_shnum;
elffile->secsize = (header->e_shentsize * header->e_shnum);
elffile->sections =
(Elf_Shdr *) _LoaderFileToMem(elffd, header->e_shoff,
elffile->secsize, "sections");
#if defined(__alpha__) || defined(__ia64__)
/*
* Need to allocate space for the .got section which will be
* fabricated later
*/
elffile->gotndx = header->e_shnum;
header->e_shnum++;
# if defined(__ia64__)
elffile->pltndx = header->e_shnum;
header->e_shnum++;
# endif
elffile->numsh = header->e_shnum;
elffile->secsize = (header->e_shentsize * header->e_shnum);
elffile->sections =
xf86loaderrealloc(elffile->sections, elffile->secsize);
#endif /*defined(__alpha__) || defined(__ia64__) */
elffile->saddr =
xf86loadercalloc(elffile->numsh, sizeof(unsigned char *));
#if defined(__alpha__) || defined(__ia64__)
/*
* Manually fill in the entry for the .got section so ELFCollectSections()
* will be able to find it.
*/
elffile->sections[elffile->gotndx].sh_name =
SecSize(header->e_shstrndx) + 1;
elffile->sections[elffile->gotndx].sh_type = SHT_PROGBITS;
elffile->sections[elffile->gotndx].sh_flags = SHF_WRITE | SHF_ALLOC;
elffile->sections[elffile->gotndx].sh_size = 0;
elffile->sections[elffile->gotndx].sh_addralign = 8;
/* Add room to copy ".got", and maintain alignment */
SecSize(header->e_shstrndx) += 8;
#endif
#if defined(__ia64__)
/*
* Manually fill in the entry for the .plt section so ELFCollectSections()
* will be able to find it.
*/
elffile->sections[elffile->pltndx].sh_name =
SecSize(header->e_shstrndx) + 1;
elffile->sections[elffile->pltndx].sh_type = SHT_PROGBITS;
elffile->sections[elffile->pltndx].sh_flags = SHF_EXECINSTR | SHF_ALLOC;
elffile->sections[elffile->pltndx].sh_size = 0;
elffile->sections[elffile->pltndx].sh_addralign = 32;
/* Add room to copy ".plt", and maintain alignment */
SecSize(header->e_shstrndx) += 32;
#endif
/*
* Get the section header string table
*/
elffile->shstrsize = SecSize(header->e_shstrndx);
elffile->shstraddr =
_LoaderFileToMem(elffd, SecOffset(header->e_shstrndx),
SecSize(header->e_shstrndx), ".shstrtab");
elffile->shstrndx = header->e_shstrndx;
#if defined(__alpha__) || defined(__ia64__)
/*
* Add the string for the .got section
*/
strcpy((char *)(elffile->shstraddr +
elffile->sections[elffile->gotndx].sh_name), ".got");
#endif
#if defined(__ia64__)
/*
* Add the string for the .plt section
*/
strcpy((char *)(elffile->shstraddr +
elffile->sections[elffile->pltndx].sh_name), ".plt");
#endif
/*
* Load some desired sections, compute size of the remaining ones
*/
totalsize = 0;
maxalign = 0;
ELFCollectSections(elffile, 0, &totalsize, &maxalign);
if (elffile->straddr == NULL || elffile->strsize == 0) {
#if 0
ErrorF("No symbols found in this module\n");
#endif
ELFUnloadModule(elffile);
return (void *)-1L;
}
/*
* add symbols
*/
*ppLookup = pLookup = ELF_GetSymbols(elffile, &secttable);
/*
* Do relocations
*/
for (i = 0; i < elffile->lsectidx; i++) {
switch (SecType(elffile->lsection[i].ndx)) {
case SHT_REL:
case SHT_RELA:
break;
default:
continue;
}
elf_reloc = ELFCollectRelocations(elffile, elffile->lsection[i].ndx);
if (elf_reloc) {
for (tail = elf_reloc; tail->next; tail = tail->next) ;
tail->next = _LoaderGetRelocations(v)->elf_reloc;
_LoaderGetRelocations(v)->elf_reloc = elf_reloc;
}
}
#if defined(__ia64__)
totalsize += (elffile->sections[elffile->pltndx].sh_addralign - 1);
totalsize &= ~(elffile->sections[elffile->pltndx].sh_addralign - 1);
totalsize += elffile->pltsize;
if (maxalign < elffile->sections[elffile->pltndx].sh_addralign)
maxalign = elffile->sections[elffile->pltndx].sh_addralign;
#endif
/* Space for COMMON */
totalsize = (totalsize + 7) & ~7;
totalsize += ElfCOMMONSize();
#ifdef MergeSectionAlloc
elffile->basesize = totalsize + maxalign;
# if !defined(DoMMAPedMerge)
elffile->base = xf86loadermalloc(elffile->basesize);
if (elffile->base == NULL) {
ErrorF("Unable to allocate ELF sections\n");
return NULL;
}
# if defined(linux) || defined(__OpenBSD__)
{
unsigned long page_size = getpagesize();
unsigned long round;
round = (unsigned long)elffile->base & (page_size - 1);
mprotect(elffile->base - round,
(elffile->basesize + round + page_size - 1) & ~(page_size -
1),
PROT_READ | PROT_WRITE | PROT_EXEC);
}
# endif
# else
MMAP_ALIGN(elffile->basesize);
elffile->base = mmap(0, elffile->basesize, MMAP_PROT, MMAP_FLAGS, -1,
(off_t) 0);
if (elffile->base == NULL) {
ErrorF("Unable to mmap ELF sections\n");
return NULL;
}
# endif
elffile->baseptr =
((long)elffile->base + (maxalign - 1)) & ~(maxalign - 1);
#endif
#if defined(__alpha__) || defined(__ia64__)
if (!ELFCreateGOT(elffile, maxalign))
return NULL;
#endif
#if defined(__ia64__)
ELFCreatePLT(elffile);
#endif
ELFCollectSections(elffile, 1, NULL, NULL);
for (i = 0; pLookup[i].symName; i++)
if (secttable[i]) {
pLookup[i].offset =
(funcptr) ((long)pLookup[i].offset +
(long)elffile->saddr[secttable[i]]);
#ifdef ELFDEBUG
ELFDEBUG("Finalizing symbol %p %s\n",
(void *)pLookup[i].offset, pLookup[i].symName);
#endif
}
xf86loaderfree(secttable);
#if defined(__ia64__)
ELFCreateOPD(elffile);
#endif
if (!ElfCreateCOMMON(elffile, *ppLookup))
return NULL;
/* Record info for gdb - if we can't allocate the loader record fail
* silently (the user will find out soon enough that there's no VM left */
if ((elfmod = xf86loadercalloc(1, sizeof(LDRModuleRec))) != NULL) {
elfmod->name = strdup(modrec->name);
elfmod->namelen = strlen(modrec->name);
elfmod->version = 1;
for (i = 0; i < elffile->lsectidx; i++) {
char *name = elffile->lsection[i].name;
if (!strcmp(name, ".text"))
elfmod->text = elffile->lsection[i].saddr;
else if (!strcmp(name, ".data"))
elfmod->data = elffile->lsection[i].saddr;
else if (!strcmp(name, ".rodata"))
elfmod->rodata = elffile->lsection[i].saddr;
else if (!strcmp(name, ".bss"))
elfmod->bss = elffile->lsection[i].saddr;
}
elfmod->next = ModList;
elfmod->commons = ldrCommons;
elfmod->commonslen = nCommons;
ModList = elfmod;
/* Tell GDB something interesting happened */
_loader_debug_state();
}
return (void *)elffile;
}
void
ELFResolveSymbols(void *mod)
{
ELFRelocPtr newlist, p, tmp;
/* Try to relocate everything. Build a new list containing entries
* which we failed to relocate. Destroy the old list in the process.
*/
newlist = 0;
for (p = _LoaderGetRelocations(mod)->elf_reloc; p;) {
#ifdef ELFDEBUG
ELFDEBUG("ResolveSymbols: "
"file %p, sec %d, r_offset 0x%x, r_info 0x%p\n",
(void *)p->file, p->secn, p->rel->r_offset,
(void *)p->rel->r_info);
#endif
tmp = Elf_RelocateEntry(p->file, p->secn, p->rel, FALSE);
if (tmp) {
/* Failed to relocate. Keep it in the list. */
tmp->next = newlist;
newlist = tmp;
}
tmp = p;
p = p->next;
xf86loaderfree(tmp);
}
_LoaderGetRelocations(mod)->elf_reloc = newlist;
}
int
ELFCheckForUnresolved(void *mod)
{
ELFRelocPtr erel;
char *name;
int flag, fatalsym = 0;
if ((erel = _LoaderGetRelocations(mod)->elf_reloc) == NULL)
return 0;
while (erel) {
Elf_RelocateEntry(erel->file, erel->secn, erel->rel, TRUE);
name = ElfGetSymbolName(erel->file, ELF_R_SYM(erel->rel->r_info));
flag = _LoaderHandleUnresolved(name,
_LoaderHandleToName(erel->file->
handle));
if (flag)
fatalsym = 1;
erel = erel->next;
}
return fatalsym;
}
void
ELFUnloadModule(void *modptr)
{
ELFModulePtr elffile = (ELFModulePtr) modptr;
ELFRelocPtr relptr, reltptr, *brelptr;
int i;
/*
* Delete any unresolved relocations
*/
relptr = _LoaderGetRelocations(elffile->funcs)->elf_reloc;
brelptr = &(_LoaderGetRelocations(elffile->funcs)->elf_reloc);
while (relptr) {
if (relptr->file == elffile) {
*brelptr = relptr->next; /* take it out of the list */
reltptr = relptr; /* save pointer to this node */
relptr = relptr->next; /* advance the pointer */
xf86loaderfree(reltptr); /* free the node */
} else {
brelptr = &(relptr->next);
relptr = relptr->next; /* advance the pointer */
}
}
/*
* Delete any symbols in the symbols table.
*/
LoaderHashTraverse((void *)elffile, ELFhashCleanOut);
/*
* Free the sections that were allocated.
*/
#if !defined (DoMMAPedMerge)
# define CheckandFree(ptr,size) if(ptr) xf86loaderfree(ptr)
#else
# define CheckandFree(ptr,size) if (ptr) munmap(ptr,size)
#endif
#define CheckandFreeFile(ptr,size) if(ptr) _LoaderFreeFileMem((ptr),(size))
#ifdef MergeSectionAlloc
CheckandFree(elffile->base, elffile->basesize);
# if defined(__alpha__) || defined(__ia64__)
if (elffile->shared_got) {
elffile->shared_got->nuses--;
if (!elffile->shared_got->nuses) {
ELFGotPtr *pgot = &ELFSharedGOTs;
while (*pgot && *pgot != elffile->shared_got)
pgot = &(*pgot)->next;
if (*pgot)
*pgot = elffile->shared_got->next;
xf86loaderfree(elffile->shared_got);
}
}
# endif
#else /*MergeSectionAlloc */
CheckandFree(elffile->common, elffile->comsize);
# if defined(__alpha__) || defined(__ia64__)
CheckandFree(elffile->got, elffile->gotsize);
# endif
# if defined(__ia64__)
CheckandFree(elffile->plt, elffile->pltsize);
# endif
#endif
#if defined(__alpha__) || defined(__ia64__)
{
ELFGotEntryPtr gotent;
while ((gotent = elffile->got_entries)) {
elffile->got_entries = gotent->next;
xf86loaderfree(gotent);
}
}
#endif
#if defined(__ia64__)
{
ELFPltEntryPtr pltent;
while ((pltent = elffile->plt_entries)) {
elffile->plt_entries = pltent->next;
xf86loaderfree(pltent);
}
}
{
ELFOpdPtr opdent;
while ((opdent = elffile->opd_entries)) {
elffile->opd_entries = opdent->next;
xf86loaderfree(opdent);
}
}
#endif
for (i = 0; i < elffile->lsectidx; i++) {
#ifdef MergeSectionAlloc
if (!(elffile->lsection[i].flags & RELOC_SECTION))
continue;
#endif
if (elffile->lsection[i].flags & LOADED_SECTION) {
CheckandFreeFile(elffile->lsection[i].saddr,
elffile->lsection[i].size);
} else {
CheckandFree(elffile->lsection[i].saddr,
elffile->lsection[i].size);
}
}
xf86loaderfree(elffile->lsection);
/*
* Free the section table, section pointer array, and section names
*/
_LoaderFreeFileMem(elffile->sections, elffile->secsize);
xf86loaderfree(elffile->saddr);
_LoaderFreeFileMem(elffile->header, sizeof(Elf_Ehdr));
_LoaderFreeFileMem(elffile->shstraddr, elffile->shstrsize);
/*
* Free the ELFModuleRec
*/
xf86loaderfree(elffile);
return;
}
char *
ELFAddressToSection(void *modptr, unsigned long address)
{
ELFModulePtr elffile = (ELFModulePtr) modptr;
int i;
for (i = 1; i < elffile->numsh; i++) {
if (address >= (unsigned long)elffile->saddr[i] &&
address <= (unsigned long)elffile->saddr[i] + SecSize(i)) {
return ElfGetSectionName(elffile, elffile->sections[i].sh_name);
}
}
return NULL;
}
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