/* -----------------------------------------------------------------------------
- * $Id: Linker.c,v 1.90 2002/06/04 19:21:28 sof Exp $
+ * $Id: Linker.c,v 1.91 2002/06/09 13:37:41 matthewc Exp $
*
* (c) The GHC Team, 2000, 2001
*
#include <sys/wait.h>
#endif
+#if defined(ia64_TARGET_ARCH)
+#define USE_MMAP
+#include <fcntl.h>
+#include <sys/mman.h>
+#endif
+
#if defined(linux_TARGET_OS) || defined(solaris2_TARGET_OS) || defined(freebsd_TARGET_OS)
# define OBJFORMAT_ELF
#elif defined(cygwin32_TARGET_OS) || defined (mingw32_TARGET_OS)
Sym(init_stack) \
SymX(__stg_chk_0) \
SymX(__stg_chk_1) \
+ SymX(stg_chk_2) \
+ SymX(stg_chk_3) \
+ SymX(stg_chk_4) \
+ SymX(stg_chk_5) \
+ SymX(stg_chk_6) \
+ SymX(stg_chk_7) \
+ SymX(stg_chk_8) \
Sym(stg_enterStackTop) \
SymX(stg_gc_d1) \
SymX(stg_gc_l1) \
SymX(__stg_gc_enter_1) \
+ SymX(stg_gc_enter_2) \
+ SymX(stg_gc_enter_3) \
+ SymX(stg_gc_enter_4) \
+ SymX(stg_gc_enter_5) \
+ SymX(stg_gc_enter_6) \
+ SymX(stg_gc_enter_7) \
+ SymX(stg_gc_enter_8) \
SymX(stg_gc_f1) \
SymX(stg_gc_noregs) \
SymX(stg_gc_seq_1) \
SymX(xorIntegerzh_fast) \
SymX(yieldzh_fast)
-#ifndef SUPPORT_LONG_LONGS
-#define RTS_LONG_LONG_SYMS /* nothing */
-#else
+#ifdef SUPPORT_LONG_LONGS
#define RTS_LONG_LONG_SYMS \
SymX(int64ToIntegerzh_fast) \
SymX(word64ToIntegerzh_fast)
-#endif /* SUPPORT_LONG_LONGS */
+#else
+#define RTS_LONG_LONG_SYMS /* nothing */
+#endif
+
+#ifdef ia64_TARGET_ARCH
+/* force these symbols to be present */
+#define RTS_EXTRA_SYMBOLS \
+ Sym(__divsf3)
+#else
+#define RTS_EXTRA_SYMBOLS /* nothing */
+#endif
/* entirely bogus claims about types of these symbols */
#define Sym(vvv) extern void (vvv);
#define SymX(vvv) /**/
RTS_SYMBOLS
RTS_LONG_LONG_SYMS
+RTS_EXTRA_SYMBOLS
RTS_POSIX_ONLY_SYMBOLS
RTS_MINGW_ONLY_SYMBOLS
RTS_CYGWIN_ONLY_SYMBOLS
static RtsSymbolVal rtsSyms[] = {
RTS_SYMBOLS
RTS_LONG_LONG_SYMS
+ RTS_EXTRA_SYMBOLS
RTS_POSIX_ONLY_SYMBOLS
RTS_MINGW_ONLY_SYMBOLS
RTS_CYGWIN_ONLY_SYMBOLS
}
#endif
+#ifdef ia64_TARGET_ARCH
+static unsigned int PLTSize(void);
+#endif
/* -----------------------------------------------------------------------------
* Load an obj (populate the global symbol table, but don't resolve yet)
ObjectCode* oc;
struct stat st;
int r, n;
+#ifdef USE_MMAP
+ int fd, pagesize;
+ void *map_addr;
+#else
FILE *f;
+#endif
/* fprintf(stderr, "loadObj %s\n", path ); */
strcpy(oc->fileName, path);
oc->fileSize = st.st_size;
- oc->image = stgMallocBytes( st.st_size, "loadObj(image)" );
oc->symbols = NULL;
oc->sections = NULL;
oc->lochash = allocStrHashTable();
oc->next = objects;
objects = oc;
+ fd = open(path, O_RDONLY);
+ if (fd == -1)
+ barf("loadObj: can't open `%s'", path);
+
+#ifdef USE_MMAP
+#define ROUND_UP(x,size) ((x + size - 1) & ~(size - 1))
+
+ /* On many architectures malloc'd memory isn't executable, so we need to use mmap. */
+
+ fd = open(path, O_RDONLY);
+ if (fd == -1)
+ barf("loadObj: can't open `%s'", path);
+
+ pagesize = getpagesize();
+
+#ifdef ia64_TARGET_ARCH
+ /* The PLT needs to be right before the object */
+ n = ROUND_UP(PLTSize(), pagesize);
+ oc->plt = mmap(NULL, n, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+ if (oc->plt == MAP_FAILED)
+ barf("loadObj: can't allocate PLT");
+
+ oc->pltIndex = 0;
+ map_addr = oc->plt + n;
+#endif
+
+ n = ROUND_UP(oc->fileSize, pagesize);
+ oc->image = mmap(map_addr, n, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
+ if (oc->image == MAP_FAILED)
+ barf("loadObj: can't map `%s'", path);
+
+ close(fd);
+
+#else /* !USE_MMAP */
+
+ oc->image = stgMallocBytes(oc->fileSize, "loadObj(image)");
+
/* load the image into memory */
f = fopen(path, "rb");
- if (!f) {
+ if (!f)
barf("loadObj: can't read `%s'", path);
- }
+
n = fread ( oc->image, 1, oc->fileSize, f );
- if (n != oc->fileSize) {
- fclose(f);
+ if (n != oc->fileSize)
barf("loadObj: error whilst reading `%s'", path);
- }
+
+ fclose(f);
+
+#endif /* USE_MMAP */
/* verify the in-memory image */
# if defined(OBJFORMAT_ELF)
# define ELF_TARGET_SPARC /* Used inside <elf.h> */
#elif defined(i386_TARGET_ARCH)
# define ELF_TARGET_386 /* Used inside <elf.h> */
+#elif defined (ia64_TARGET_ARCH)
+# define ELF_TARGET_IA64 /* Used inside <elf.h> */
+# define ELF_64BIT
+# define ELF_FUNCTION_DESC /* calling convention uses function descriptors */
+# define ELF_NEED_GOT /* needs Global Offset Table */
+# define ELF_NEED_PLT /* needs Procedure Linkage Tables */
#endif
-/* There is a similar case for IA64 in the Solaris2 headers if this
- * ever becomes relevant.
- */
#include <elf.h>
-#include <ctype.h>
+
+/*
+ * Define a set of types which can be used for both ELF32 and ELF64
+ */
+
+#ifdef ELF_64BIT
+#define ELFCLASS ELFCLASS64
+#define Elf_Addr Elf64_Addr
+#define Elf_Word Elf64_Word
+#define Elf_Sword Elf64_Sword
+#define Elf_Ehdr Elf64_Ehdr
+#define Elf_Phdr Elf64_Phdr
+#define Elf_Shdr Elf64_Shdr
+#define Elf_Sym Elf64_Sym
+#define Elf_Rel Elf64_Rel
+#define Elf_Rela Elf64_Rela
+#define ELF_ST_TYPE ELF64_ST_TYPE
+#define ELF_ST_BIND ELF64_ST_BIND
+#define ELF_R_TYPE ELF64_R_TYPE
+#define ELF_R_SYM ELF64_R_SYM
+#else
+#define ELFCLASS ELFCLASS32
+#define Elf_Addr Elf32_Addr
+#define Elf_Word Elf32_Word
+#define Elf_Sword Elf32_Sword
+#define Elf_Ehdr Elf32_Ehdr
+#define Elf_Phdr Elf32_Phdr
+#define Elf_Shdr Elf32_Shdr
+#define Elf_Sym Elf32_Sym
+#define Elf_Rel Elf32_Rel
+#define Elf_Rela Elf32_Rela
+#define ELF_ST_TYPE ELF32_ST_TYPE
+#define ELF_ST_BIND ELF32_ST_BIND
+#define ELF_R_TYPE ELF32_R_TYPE
+#define ELF_R_SYM ELF32_R_SYM
+#endif
+
+
+/*
+ * Functions to allocate entries in dynamic sections. Currently we simply
+ * preallocate a large number, and we don't check if a entry for the given
+ * target already exists (a linear search is too slow). Ideally these
+ * entries would be associated with symbols.
+ */
+
+/* These sizes sufficient to load HSbase + HShaskell98 + a few modules */
+#define GOT_SIZE 0x20000
+#define FUNCTION_TABLE_SIZE 0x10000
+#define PLT_SIZE 0x08000
+
+#ifdef ELF_NEED_GOT
+static Elf_Addr got[GOT_SIZE];
+static unsigned int gotIndex;
+static Elf_Addr gp_val = (Elf_Addr)got;
+
+static Elf_Addr
+allocateGOTEntry(Elf_Addr target)
+{
+ Elf_Addr *entry;
+
+ if (gotIndex >= GOT_SIZE)
+ barf("Global offset table overflow");
+
+ entry = &got[gotIndex++];
+ *entry = target;
+ return (Elf_Addr)entry;
+}
+#endif
+
+#ifdef ELF_FUNCTION_DESC
+typedef struct {
+ Elf_Addr ip;
+ Elf_Addr gp;
+} FunctionDesc;
+
+static FunctionDesc functionTable[FUNCTION_TABLE_SIZE];
+static unsigned int functionTableIndex;
+
+static Elf_Addr
+allocateFunctionDesc(Elf_Addr target)
+{
+ FunctionDesc *entry;
+
+ if (functionTableIndex >= FUNCTION_TABLE_SIZE)
+ barf("Function table overflow");
+
+ entry = &functionTable[functionTableIndex++];
+ entry->ip = target;
+ entry->gp = (Elf_Addr)gp_val;
+ return (Elf_Addr)entry;
+}
+
+static Elf_Addr
+copyFunctionDesc(Elf_Addr target)
+{
+ FunctionDesc *olddesc = (FunctionDesc *)target;
+ FunctionDesc *newdesc;
+
+ newdesc = (FunctionDesc *)allocateFunctionDesc(olddesc->ip);
+ newdesc->gp = olddesc->gp;
+ return (Elf_Addr)newdesc;
+}
+#endif
+
+#ifdef ELF_NEED_PLT
+#ifdef ia64_TARGET_ARCH
+static void ia64_reloc_gprel22(Elf_Addr target, Elf_Addr value);
+static void ia64_reloc_pcrel21(Elf_Addr target, Elf_Addr value, ObjectCode *oc);
+
+static unsigned char plt_code[] =
+{
+ /* taken from binutils bfd/elfxx-ia64.c */
+ 0x0b, 0x78, 0x00, 0x02, 0x00, 0x24, /* [MMI] addl r15=0,r1;; */
+ 0x00, 0x41, 0x3c, 0x30, 0x28, 0xc0, /* ld8 r16=[r15],8 */
+ 0x01, 0x08, 0x00, 0x84, /* mov r14=r1;; */
+ 0x11, 0x08, 0x00, 0x1e, 0x18, 0x10, /* [MIB] ld8 r1=[r15] */
+ 0x60, 0x80, 0x04, 0x80, 0x03, 0x00, /* mov b6=r16 */
+ 0x60, 0x00, 0x80, 0x00 /* br.few b6;; */
+};
+
+/* If we can't get to the function descriptor via gp, take a local copy of it */
+#define PLT_RELOC(code, target) { \
+ Elf64_Sxword rel_value = target - gp_val; \
+ if ((rel_value > 0x1fffff) || (rel_value < -0x1fffff)) \
+ ia64_reloc_gprel22((Elf_Addr)code, copyFunctionDesc(target)); \
+ else \
+ ia64_reloc_gprel22((Elf_Addr)code, target); \
+ }
+#endif
+
+typedef struct {
+ unsigned char code[sizeof(plt_code)];
+} PLTEntry;
+
+static Elf_Addr
+allocatePLTEntry(Elf_Addr target, ObjectCode *oc)
+{
+ PLTEntry *plt = (PLTEntry *)oc->plt;
+ PLTEntry *entry;
+
+ if (oc->pltIndex >= PLT_SIZE)
+ barf("Procedure table overflow");
+
+ entry = &plt[oc->pltIndex++];
+ memcpy(entry->code, plt_code, sizeof(entry->code));
+ PLT_RELOC(entry->code, target);
+ return (Elf_Addr)entry;
+}
+
+static unsigned int
+PLTSize(void)
+{
+ return (PLT_SIZE * sizeof(PLTEntry));
+}
+#endif
+
+
+/*
+ * Generic ELF functions
+ */
static char *
-findElfSection ( void* objImage, Elf32_Word sh_type )
+findElfSection ( void* objImage, Elf_Word sh_type )
{
- int i;
char* ehdrC = (char*)objImage;
- Elf32_Ehdr* ehdr = (Elf32_Ehdr*)ehdrC;
- Elf32_Shdr* shdr = (Elf32_Shdr*)(ehdrC + ehdr->e_shoff);
+ Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
+ Elf_Shdr* shdr = (Elf_Shdr*)(ehdrC + ehdr->e_shoff);
char* sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
char* ptr = NULL;
+ int i;
+
for (i = 0; i < ehdr->e_shnum; i++) {
if (shdr[i].sh_type == sh_type
/* Ignore the section header's string table. */
return ptr;
}
+static Elf_Addr
+findElfSegment ( void* objImage, Elf_Addr vaddr )
+{
+ char* ehdrC = (char*)objImage;
+ Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
+ Elf_Phdr* phdr = (Elf_Phdr*)(ehdrC + ehdr->e_phoff);
+ Elf_Addr segaddr = 0;
+ int i;
+
+ for (i = 0; i < ehdr->e_phnum; i++) {
+ segaddr = phdr[i].p_vaddr;
+ if ((vaddr >= segaddr) && (vaddr < segaddr + phdr[i].p_memsz))
+ break;
+ }
+ return segaddr;
+}
static int
ocVerifyImage_ELF ( ObjectCode* oc )
{
- Elf32_Shdr* shdr;
- Elf32_Sym* stab;
+ Elf_Shdr* shdr;
+ Elf_Sym* stab;
int i, j, nent, nstrtab, nsymtabs;
char* sh_strtab;
char* strtab;
- char* ehdrC = (char*)(oc->image);
- Elf32_Ehdr* ehdr = ( Elf32_Ehdr*)ehdrC;
+ char* ehdrC = (char*)(oc->image);
+ Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
if (ehdr->e_ident[EI_MAG0] != ELFMAG0 ||
ehdr->e_ident[EI_MAG1] != ELFMAG1 ||
ehdr->e_ident[EI_MAG2] != ELFMAG2 ||
ehdr->e_ident[EI_MAG3] != ELFMAG3) {
- belch("%s: not an ELF header", oc->fileName);
+ belch("%s: not an ELF object", oc->fileName);
return 0;
}
- IF_DEBUG(linker,belch( "Is an ELF header" ));
- if (ehdr->e_ident[EI_CLASS] != ELFCLASS32) {
- belch("%s: not 32 bit ELF", oc->fileName);
+ if (ehdr->e_ident[EI_CLASS] != ELFCLASS) {
+ belch("%s: unsupported ELF format", oc->fileName);
return 0;
}
- IF_DEBUG(linker,belch( "Is 32 bit ELF" ));
-
if (ehdr->e_ident[EI_DATA] == ELFDATA2LSB) {
IF_DEBUG(linker,belch( "Is little-endian" ));
} else
switch (ehdr->e_machine) {
case EM_386: IF_DEBUG(linker,belch( "x86" )); break;
case EM_SPARC: IF_DEBUG(linker,belch( "sparc" )); break;
+ case EM_IA_64: IF_DEBUG(linker,belch( "ia64" )); break;
default: IF_DEBUG(linker,belch( "unknown" ));
belch("%s: unknown architecture", oc->fileName);
return 0;
"\nSection header table: start %d, n_entries %d, ent_size %d",
ehdr->e_shoff, ehdr->e_shnum, ehdr->e_shentsize ));
- ASSERT (ehdr->e_shentsize == sizeof(Elf32_Shdr));
+ ASSERT (ehdr->e_shentsize == sizeof(Elf_Shdr));
- shdr = (Elf32_Shdr*) (ehdrC + ehdr->e_shoff);
+ shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
if (ehdr->e_shstrndx == SHN_UNDEF) {
belch("%s: no section header string table", oc->fileName);
if (shdr[i].sh_type != SHT_SYMTAB) continue;
IF_DEBUG(linker,belch( "section %d is a symbol table", i ));
nsymtabs++;
- stab = (Elf32_Sym*) (ehdrC + shdr[i].sh_offset);
- nent = shdr[i].sh_size / sizeof(Elf32_Sym);
+ stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
+ nent = shdr[i].sh_size / sizeof(Elf_Sym);
IF_DEBUG(linker,belch( " number of entries is apparently %d (%d rem)",
nent,
- shdr[i].sh_size % sizeof(Elf32_Sym)
+ shdr[i].sh_size % sizeof(Elf_Sym)
));
- if (0 != shdr[i].sh_size % sizeof(Elf32_Sym)) {
+ if (0 != shdr[i].sh_size % sizeof(Elf_Sym)) {
belch("%s: non-integral number of symbol table entries", oc->fileName);
return 0;
}
(char*)stab[j].st_value ));
IF_DEBUG(linker,fprintf(stderr, "type=" ));
- switch (ELF32_ST_TYPE(stab[j].st_info)) {
+ switch (ELF_ST_TYPE(stab[j].st_info)) {
case STT_NOTYPE: IF_DEBUG(linker,fprintf(stderr, "notype " )); break;
case STT_OBJECT: IF_DEBUG(linker,fprintf(stderr, "object " )); break;
case STT_FUNC : IF_DEBUG(linker,fprintf(stderr, "func " )); break;
IF_DEBUG(linker,fprintf(stderr, " " ));
IF_DEBUG(linker,fprintf(stderr, "bind=" ));
- switch (ELF32_ST_BIND(stab[j].st_info)) {
+ switch (ELF_ST_BIND(stab[j].st_info)) {
case STB_LOCAL : IF_DEBUG(linker,fprintf(stderr, "local " )); break;
case STB_GLOBAL: IF_DEBUG(linker,fprintf(stderr, "global" )); break;
case STB_WEAK : IF_DEBUG(linker,fprintf(stderr, "weak " )); break;
ocGetNames_ELF ( ObjectCode* oc )
{
int i, j, k, nent;
- Elf32_Sym* stab;
+ Elf_Sym* stab;
- char* ehdrC = (char*)(oc->image);
- Elf32_Ehdr* ehdr = (Elf32_Ehdr*)ehdrC;
- char* strtab = findElfSection ( ehdrC, SHT_STRTAB );
- Elf32_Shdr* shdr = (Elf32_Shdr*) (ehdrC + ehdr->e_shoff);
+ char* ehdrC = (char*)(oc->image);
+ Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
+ char* strtab = findElfSection ( ehdrC, SHT_STRTAB );
+ Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
ASSERT(symhash != NULL);
/* Figure out what kind of section it is. Logic derived from
Figure 1.14 ("Special Sections") of the ELF document
("Portable Formats Specification, Version 1.1"). */
- Elf32_Shdr hdr = shdr[i];
+ Elf_Shdr hdr = shdr[i];
SectionKind kind = SECTIONKIND_OTHER;
int is_bss = FALSE;
if (shdr[i].sh_type != SHT_SYMTAB) continue;
/* copy stuff into this module's object symbol table */
- stab = (Elf32_Sym*) (ehdrC + shdr[i].sh_offset);
- nent = shdr[i].sh_size / sizeof(Elf32_Sym);
+ stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
+ nent = shdr[i].sh_size / sizeof(Elf_Sym);
oc->n_symbols = nent;
oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
since the linker should never poke around in it. */
}
else
- if ( ( ELF32_ST_BIND(stab[j].st_info)==STB_GLOBAL
- || ELF32_ST_BIND(stab[j].st_info)==STB_LOCAL
+ if ( ( ELF_ST_BIND(stab[j].st_info)==STB_GLOBAL
+ || ELF_ST_BIND(stab[j].st_info)==STB_LOCAL
)
/* and not an undefined symbol */
&& stab[j].st_shndx != SHN_UNDEF
&& stab[j].st_shndx < SHN_LORESERVE
&&
/* and it's a not a section or string table or anything silly */
- ( ELF32_ST_TYPE(stab[j].st_info)==STT_FUNC ||
- ELF32_ST_TYPE(stab[j].st_info)==STT_OBJECT ||
- ELF32_ST_TYPE(stab[j].st_info)==STT_NOTYPE
+ ( ELF_ST_TYPE(stab[j].st_info)==STT_FUNC ||
+ ELF_ST_TYPE(stab[j].st_info)==STT_OBJECT ||
+ ELF_ST_TYPE(stab[j].st_info)==STT_NOTYPE
)
) {
/* Section 0 is the undefined section, hence > and not >=. */
}
*/
ad = ehdrC + shdr[ secno ].sh_offset + stab[j].st_value;
- if (ELF32_ST_BIND(stab[j].st_info)==STB_LOCAL) {
+ if (ELF_ST_BIND(stab[j].st_info)==STB_LOCAL) {
isLocal = TRUE;
} else {
+#ifdef ELF_FUNCTION_DESC
+ /* dlsym() and the initialisation table both give us function
+ * descriptors, so to be consistent we store function descriptors
+ * in the symbol table */
+ if (ELF_ST_TYPE(stab[j].st_info) == STT_FUNC)
+ ad = (char *)allocateFunctionDesc((Elf_Addr)ad);
+#endif
IF_DEBUG(linker,belch( "addOTabName(GLOB): %10p %s %s",
ad, oc->fileName, nm ));
isLocal = FALSE;
/*
fprintf(stderr,
"skipping bind = %d, type = %d, shndx = %d `%s'\n",
- (int)ELF32_ST_BIND(stab[j].st_info),
- (int)ELF32_ST_TYPE(stab[j].st_info),
+ (int)ELF_ST_BIND(stab[j].st_info),
+ (int)ELF_ST_TYPE(stab[j].st_info),
(int)stab[j].st_shndx,
strtab + stab[j].st_name
);
return 1;
}
-
/* Do ELF relocations which lack an explicit addend. All x86-linux
relocations appear to be of this form. */
static int
-do_Elf32_Rel_relocations ( ObjectCode* oc, char* ehdrC,
- Elf32_Shdr* shdr, int shnum,
- Elf32_Sym* stab, char* strtab )
+do_Elf_Rel_relocations ( ObjectCode* oc, char* ehdrC,
+ Elf_Shdr* shdr, int shnum,
+ Elf_Sym* stab, char* strtab )
{
int j;
char *symbol;
- Elf32_Word* targ;
- Elf32_Rel* rtab = (Elf32_Rel*) (ehdrC + shdr[shnum].sh_offset);
- int nent = shdr[shnum].sh_size / sizeof(Elf32_Rel);
+ Elf_Word* targ;
+ Elf_Rel* rtab = (Elf_Rel*) (ehdrC + shdr[shnum].sh_offset);
+ int nent = shdr[shnum].sh_size / sizeof(Elf_Rel);
int target_shndx = shdr[shnum].sh_info;
int symtab_shndx = shdr[shnum].sh_link;
- stab = (Elf32_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
- targ = (Elf32_Word*)(ehdrC + shdr[ target_shndx ].sh_offset);
+
+ stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
+ targ = (Elf_Word*)(ehdrC + shdr[ target_shndx ].sh_offset);
IF_DEBUG(linker,belch( "relocations for section %d using symtab %d",
target_shndx, symtab_shndx ));
+
for (j = 0; j < nent; j++) {
- Elf32_Addr offset = rtab[j].r_offset;
- Elf32_Word info = rtab[j].r_info;
+ Elf_Addr offset = rtab[j].r_offset;
+ Elf_Word info = rtab[j].r_info;
- Elf32_Addr P = ((Elf32_Addr)targ) + offset;
- Elf32_Word* pP = (Elf32_Word*)P;
- Elf32_Addr A = *pP;
- Elf32_Addr S;
+ Elf_Addr P = ((Elf_Addr)targ) + offset;
+ Elf_Word* pP = (Elf_Word*)P;
+ Elf_Addr A = *pP;
+ Elf_Addr S;
+ Elf_Addr value;
IF_DEBUG(linker,belch( "Rel entry %3d is raw(%6p %6p)",
j, (void*)offset, (void*)info ));
IF_DEBUG(linker,belch( " ZERO" ));
S = 0;
} else {
- Elf32_Sym sym = stab[ELF32_R_SYM(info)];
+ Elf_Sym sym = stab[ELF_R_SYM(info)];
/* First see if it is a local symbol. */
- if (ELF32_ST_BIND(sym.st_info) == STB_LOCAL) {
+ if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
/* Yes, so we can get the address directly from the ELF symbol
table. */
symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
- S = (Elf32_Addr)
+ S = (Elf_Addr)
(ehdrC + shdr[ sym.st_shndx ].sh_offset
- + stab[ELF32_R_SYM(info)].st_value);
+ + stab[ELF_R_SYM(info)].st_value);
} else {
/* No, so look up the name in our global table. */
}
IF_DEBUG(linker,belch( "`%s' resolves to %p", symbol, (void*)S ));
}
+
IF_DEBUG(linker,belch( "Reloc: P = %p S = %p A = %p",
(void*)P, (void*)S, (void*)A ));
checkProddableBlock ( oc, pP );
- switch (ELF32_R_TYPE(info)) {
+
+ value = S + A;
+
+ switch (ELF_R_TYPE(info)) {
# ifdef i386_TARGET_ARCH
- case R_386_32: *pP = S + A; break;
- case R_386_PC32: *pP = S + A - P; break;
+ case R_386_32: *pP = value; break;
+ case R_386_PC32: *pP = value - P; break;
# endif
default:
belch("%s: unhandled ELF relocation(Rel) type %d\n",
- oc->fileName, ELF32_R_TYPE(info));
+ oc->fileName, ELF_R_TYPE(info));
return 0;
}
return 1;
}
-
/* Do ELF relocations for which explicit addends are supplied.
sparc-solaris relocations appear to be of this form. */
static int
-do_Elf32_Rela_relocations ( ObjectCode* oc, char* ehdrC,
- Elf32_Shdr* shdr, int shnum,
- Elf32_Sym* stab, char* strtab )
+do_Elf_Rela_relocations ( ObjectCode* oc, char* ehdrC,
+ Elf_Shdr* shdr, int shnum,
+ Elf_Sym* stab, char* strtab )
{
int j;
char *symbol;
- Elf32_Word* targ;
- Elf32_Rela* rtab = (Elf32_Rela*) (ehdrC + shdr[shnum].sh_offset);
- int nent = shdr[shnum].sh_size / sizeof(Elf32_Rela);
+ Elf_Addr* targ;
+ Elf_Rela* rtab = (Elf_Rela*) (ehdrC + shdr[shnum].sh_offset);
+ int nent = shdr[shnum].sh_size / sizeof(Elf_Rela);
int target_shndx = shdr[shnum].sh_info;
int symtab_shndx = shdr[shnum].sh_link;
- stab = (Elf32_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
- targ = (Elf32_Word*)(ehdrC + shdr[ target_shndx ].sh_offset);
+
+ stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
+ targ = (Elf_Addr*)(ehdrC + shdr[ target_shndx ].sh_offset);
IF_DEBUG(linker,belch( "relocations for section %d using symtab %d",
target_shndx, symtab_shndx ));
+
for (j = 0; j < nent; j++) {
- Elf32_Addr offset = rtab[j].r_offset;
- Elf32_Word info = rtab[j].r_info;
-# if defined(sparc_TARGET_ARCH) || defined(DEBUG)
- Elf32_Sword addend = rtab[j].r_addend;
- Elf32_Addr A = addend;
-# endif
- Elf32_Addr P = ((Elf32_Addr)targ) + offset;
- Elf32_Addr S;
+ Elf_Addr offset = rtab[j].r_offset;
+ Elf_Addr info = rtab[j].r_info;
+ Elf_Addr A = rtab[j].r_addend;
+ Elf_Addr P = (Elf_Addr)targ + offset;
+ Elf_Addr S;
+ Elf_Addr value;
# if defined(sparc_TARGET_ARCH)
/* This #ifdef only serves to avoid unused-var warnings. */
- Elf32_Word* pP = (Elf32_Word*)P;
- Elf32_Word w1, w2;
+ Elf_Word* pP = (Elf_Word*)P;
+ Elf_Word w1, w2;
+# elif defined(ia64_TARGET_ARCH)
+ Elf64_Xword *pP = (Elf64_Xword *)P;
+ Elf_Addr addr;
# endif
IF_DEBUG(linker,belch( "Rel entry %3d is raw(%6p %6p %6p) ",
j, (void*)offset, (void*)info,
- (void*)addend ));
+ (void*)A ));
if (!info) {
IF_DEBUG(linker,belch( " ZERO" ));
S = 0;
} else {
- Elf32_Sym sym = stab[ELF32_R_SYM(info)];
+ Elf_Sym sym = stab[ELF_R_SYM(info)];
/* First see if it is a local symbol. */
- if (ELF32_ST_BIND(sym.st_info) == STB_LOCAL) {
+ if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
/* Yes, so we can get the address directly from the ELF symbol
table. */
symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
- S = (Elf32_Addr)
+ S = (Elf_Addr)
(ehdrC + shdr[ sym.st_shndx ].sh_offset
- + stab[ELF32_R_SYM(info)].st_value);
-
+ + stab[ELF_R_SYM(info)].st_value);
+#ifdef ELF_FUNCTION_DESC
+ /* Make a function descriptor for this function */
+ if (S && ELF_ST_TYPE(sym.st_info) == STT_FUNC) {
+ S = allocateFunctionDesc(S + A);
+ A = 0;
+ }
+#endif
} else {
/* No, so look up the name in our global table. */
symbol = strtab + sym.st_name;
(void*)S = lookupSymbol( symbol );
+
+#ifdef ELF_FUNCTION_DESC
+ /* If a function, already a function descriptor - we would
+ have to copy it to add an offset. */
+ if (S && ELF_ST_TYPE(sym.st_info) == STT_FUNC)
+ assert(A == 0);
+#endif
}
if (!S) {
belch("%s: unknown symbol `%s'", oc->fileName, symbol);
return 0;
- /*
- S = 0x11223344;
- fprintf ( stderr, "S %p A %p S+A %p S+A-P %p\n",S,A,S+A,S+A-P);
- */
}
IF_DEBUG(linker,belch( "`%s' resolves to %p", symbol, (void*)S ));
}
+
IF_DEBUG(linker,fprintf ( stderr, "Reloc: P = %p S = %p A = %p\n",
(void*)P, (void*)S, (void*)A ));
- checkProddableBlock ( oc, (void*)P );
- switch (ELF32_R_TYPE(info)) {
+ /* checkProddableBlock ( oc, (void*)P ); */
+
+ value = S + A;
+
+ switch (ELF_R_TYPE(info)) {
# if defined(sparc_TARGET_ARCH)
case R_SPARC_WDISP30:
w1 = *pP & 0xC0000000;
- w2 = (Elf32_Word)((S + A - P) >> 2);
+ w2 = (Elf_Word)((value - P) >> 2);
ASSERT((w2 & 0xC0000000) == 0);
w1 |= w2;
*pP = w1;
break;
case R_SPARC_HI22:
w1 = *pP & 0xFFC00000;
- w2 = (Elf32_Word)((S + A) >> 10);
+ w2 = (Elf_Word)(value >> 10);
ASSERT((w2 & 0xFFC00000) == 0);
w1 |= w2;
*pP = w1;
break;
case R_SPARC_LO10:
w1 = *pP & ~0x3FF;
- w2 = (Elf32_Word)((S + A) & 0x3FF);
+ w2 = (Elf_Word)(value & 0x3FF);
ASSERT((w2 & ~0x3FF) == 0);
w1 |= w2;
*pP = w1;
*/
case R_SPARC_UA32:
case R_SPARC_32:
- w2 = (Elf32_Word)(S + A);
+ w2 = (Elf_Word)value;
*pP = w2;
break;
+# elif defined(ia64_TARGET_ARCH)
+ case R_IA64_DIR64LSB:
+ case R_IA64_FPTR64LSB:
+ *pP = value;
+ break;
+ case R_IA64_SEGREL64LSB:
+ addr = findElfSegment(ehdrC, value);
+ *pP = value - addr;
+ break;
+ case R_IA64_GPREL22:
+ ia64_reloc_gprel22(P, value);
+ break;
+ case R_IA64_LTOFF22:
+ case R_IA64_LTOFF_FPTR22:
+ addr = allocateGOTEntry(value);
+ ia64_reloc_gprel22(P, addr);
+ break;
+ case R_IA64_PCREL21B:
+ ia64_reloc_pcrel21(P, S, oc);
+ break;
# endif
default:
belch("%s: unhandled ELF relocation(RelA) type %d\n",
- oc->fileName, ELF32_R_TYPE(info));
+ oc->fileName, ELF_R_TYPE(info));
return 0;
}
return 1;
}
-
static int
ocResolve_ELF ( ObjectCode* oc )
{
char *strtab;
int shnum, ok;
- Elf32_Sym* stab = NULL;
- char* ehdrC = (char*)(oc->image);
- Elf32_Ehdr* ehdr = (Elf32_Ehdr*) ehdrC;
- Elf32_Shdr* shdr = (Elf32_Shdr*) (ehdrC + ehdr->e_shoff);
- char* sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
+ Elf_Sym* stab = NULL;
+ char* ehdrC = (char*)(oc->image);
+ Elf_Ehdr* ehdr = (Elf_Ehdr*) ehdrC;
+ Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
+ char* sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
/* first find "the" symbol table */
- stab = (Elf32_Sym*) findElfSection ( ehdrC, SHT_SYMTAB );
+ stab = (Elf_Sym*) findElfSection ( ehdrC, SHT_SYMTAB );
/* also go find the string table */
strtab = findElfSection ( ehdrC, SHT_STRTAB );
continue;
if (shdr[shnum].sh_type == SHT_REL ) {
- ok = do_Elf32_Rel_relocations ( oc, ehdrC, shdr,
- shnum, stab, strtab );
+ ok = do_Elf_Rel_relocations ( oc, ehdrC, shdr,
+ shnum, stab, strtab );
if (!ok) return ok;
}
else
if (shdr[shnum].sh_type == SHT_RELA) {
- ok = do_Elf32_Rela_relocations ( oc, ehdrC, shdr,
- shnum, stab, strtab );
+ ok = do_Elf_Rela_relocations ( oc, ehdrC, shdr,
+ shnum, stab, strtab );
if (!ok) return ok;
}
-
}
/* Free the local symbol table; we won't need it again. */
}
+/*
+ * IA64 specifics
+ * Instructions are 41 bits long, packed into 128 bit bundles with a 5-bit template
+ * at the front. The following utility functions pack and unpack instructions, and
+ * take care of the most common relocations.
+ */
+
+#ifdef ia64_TARGET_ARCH
+
+static Elf64_Xword
+ia64_extract_instruction(Elf64_Xword *target)
+{
+ Elf64_Xword w1, w2;
+ int slot = (Elf_Addr)target & 3;
+ (Elf_Addr)target &= ~3;
+
+ w1 = *target;
+ w2 = *(target+1);
+
+ switch (slot)
+ {
+ case 0:
+ return ((w1 >> 5) & 0x1ffffffffff);
+ case 1:
+ return (w1 >> 46) | ((w2 & 0x7fffff) << 18);
+ case 2:
+ return (w2 >> 23);
+ default:
+ barf("ia64_extract_instruction: invalid slot %p", target);
+ }
+}
+
+static void
+ia64_deposit_instruction(Elf64_Xword *target, Elf64_Xword value)
+{
+ int slot = (Elf_Addr)target & 3;
+ (Elf_Addr)target &= ~3;
+
+ switch (slot)
+ {
+ case 0:
+ *target |= value << 5;
+ break;
+ case 1:
+ *target |= value << 46;
+ *(target+1) |= value >> 18;
+ break;
+ case 2:
+ *(target+1) |= value << 23;
+ break;
+ }
+}
+
+static void
+ia64_reloc_gprel22(Elf_Addr target, Elf_Addr value)
+{
+ Elf64_Xword instruction;
+ Elf64_Sxword rel_value;
+
+ rel_value = value - gp_val;
+ if ((rel_value > 0x1fffff) || (rel_value < -0x1fffff))
+ barf("GP-relative data out of range (address = 0x%lx, gp = 0x%lx)", value, gp_val);
+
+ instruction = ia64_extract_instruction((Elf64_Xword *)target);
+ instruction |= (((rel_value >> 0) & 0x07f) << 13) /* imm7b */
+ | (((rel_value >> 7) & 0x1ff) << 27) /* imm9d */
+ | (((rel_value >> 16) & 0x01f) << 22) /* imm5c */
+ | ((Elf64_Xword)(rel_value < 0) << 36); /* s */
+ ia64_deposit_instruction((Elf64_Xword *)target, instruction);
+}
+
+static void
+ia64_reloc_pcrel21(Elf_Addr target, Elf_Addr value, ObjectCode *oc)
+{
+ Elf64_Xword instruction;
+ Elf64_Sxword rel_value;
+ Elf_Addr entry;
+
+ entry = allocatePLTEntry(value, oc);
+
+ rel_value = (entry >> 4) - (target >> 4);
+ if ((rel_value > 0xfffff) || (rel_value < -0xfffff))
+ barf("PLT entry too far away (entry = 0x%lx, target = 0x%lx)", entry, target);
+
+ instruction = ia64_extract_instruction((Elf64_Xword *)target);
+ instruction |= ((rel_value & 0xfffff) << 13) /* imm20b */
+ | ((Elf64_Xword)(rel_value < 0) << 36); /* s */
+ ia64_deposit_instruction((Elf64_Xword *)target, instruction);
+}
+
+#endif /* ia64 */
+
#endif /* ELF */
projects / ghc-hetmet.git / commitdiff