/* BFD backend for SunOS binaries.
- Copyright (C) 1990-1991 Free Software Foundation, Inc.
+ Copyright (C) 1990, 91, 92, 93, 94 Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
#define MY(OP) CAT(sunos_big_,OP)
#include "bfd.h"
+#include "bfdlink.h"
+#include "libaout.h"
/* Static routines defined in this file. */
-struct external_nlist;
-
static boolean sunos_read_dynamic_info PARAMS ((bfd *));
-static bfd_size_type MY(read_dynamic_symbols)
- PARAMS ((bfd *, struct external_nlist **, char **, bfd_size_type *));
-static bfd_size_type MY(read_dynamic_relocs) PARAMS ((bfd *, PTR *));
+static long sunos_get_dynamic_symtab_upper_bound PARAMS ((bfd *));
+static long sunos_canonicalize_dynamic_symtab PARAMS ((bfd *, asymbol **));
+static long sunos_get_dynamic_reloc_upper_bound PARAMS ((bfd *));
+static long sunos_canonicalize_dynamic_reloc
+ PARAMS ((bfd *, arelent **, asymbol **));
+static struct bfd_hash_entry *sunos_link_hash_newfunc
+ PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
+static struct bfd_link_hash_table *sunos_link_hash_table_create
+ PARAMS ((bfd *));
+static boolean sunos_add_dynamic_symbols
+ PARAMS ((bfd *, struct bfd_link_info *));
+static boolean sunos_add_one_symbol
+ PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword, asection *,
+ bfd_vma, const char *, boolean, boolean,
+ struct bfd_link_hash_entry **));
+static boolean sunos_scan_relocs
+ PARAMS ((struct bfd_link_info *, bfd *, asection *, bfd_size_type));
+static boolean sunos_scan_std_relocs
+ PARAMS ((struct bfd_link_info *, bfd *, asection *,
+ const struct reloc_std_external *, bfd_size_type));
+static boolean sunos_scan_ext_relocs
+ PARAMS ((struct bfd_link_info *, bfd *, asection *,
+ const struct reloc_ext_external *, bfd_size_type));
+static boolean sunos_link_dynamic_object
+ PARAMS ((struct bfd_link_info *, bfd *));
+static boolean sunos_write_dynamic_symbol
+ PARAMS ((bfd *, struct bfd_link_info *, struct aout_link_hash_entry *));
+static boolean sunos_check_dynamic_reloc
+ PARAMS ((struct bfd_link_info *, bfd *, asection *,
+ struct aout_link_hash_entry *, PTR, boolean *));
+static boolean sunos_finish_dynamic_link
+ PARAMS ((bfd *, struct bfd_link_info *));
-#define MY_read_dynamic_symbols MY(read_dynamic_symbols)
-#define MY_read_dynamic_relocs MY(read_dynamic_relocs)
+#define MY_get_dynamic_symtab_upper_bound sunos_get_dynamic_symtab_upper_bound
+#define MY_canonicalize_dynamic_symtab sunos_canonicalize_dynamic_symtab
+#define MY_get_dynamic_reloc_upper_bound sunos_get_dynamic_reloc_upper_bound
+#define MY_canonicalize_dynamic_reloc sunos_canonicalize_dynamic_reloc
+#define MY_bfd_link_hash_table_create sunos_link_hash_table_create
+#define MY_add_dynamic_symbols sunos_add_dynamic_symbols
+#define MY_add_one_symbol sunos_add_one_symbol
+#define MY_link_dynamic_object sunos_link_dynamic_object
+#define MY_write_dynamic_symbol sunos_write_dynamic_symbol
+#define MY_check_dynamic_reloc sunos_check_dynamic_reloc
+#define MY_finish_dynamic_link sunos_finish_dynamic_link
/* Include the usual a.out support. */
#include "aoutf1.h"
/* Dynamic information. */
struct internal_sun4_dynamic_link dyninfo;
/* Number of dynamic symbols. */
- bfd_size_type dynsym_count;
+ long dynsym_count;
/* Read in nlists for dynamic symbols. */
struct external_nlist *dynsym;
+ /* asymbol structures for dynamic symbols. */
+ aout_symbol_type *canonical_dynsym;
/* Read in dynamic string table. */
char *dynstr;
/* Number of dynamic relocs. */
- bfd_size_type dynrel_count;
+ long dynrel_count;
/* Read in dynamic relocs. This may be reloc_std_external or
reloc_ext_external. */
PTR dynrel;
+ /* arelent structures for dynamic relocs. */
+ arelent *canonical_dynrel;
};
+/* The hash table of dynamic symbols is composed of two word entries.
+ See include/aout/sun4.h for details. */
+
+#define HASH_ENTRY_SIZE (2 * BYTES_IN_WORD)
+
/* Read in the basic dynamic information. This locates the __DYNAMIC
structure and uses it to find the dynamic_link structure. It
creates and saves a sunos_dynamic_info structure. If it can't find
bfd *abfd;
{
struct sunos_dynamic_info *info;
- struct external_nlist dynsym;
- char buf[sizeof "__DYNAMIC"];
asection *dynsec;
file_ptr dynoff;
struct external_sun4_dynamic dyninfo;
if (obj_aout_dynamic_info (abfd) != (PTR) NULL)
return true;
+ if ((abfd->flags & DYNAMIC) == 0)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
+ }
+
info = ((struct sunos_dynamic_info *)
bfd_zalloc (abfd, sizeof (struct sunos_dynamic_info)));
if (!info)
info->valid = false;
info->dynsym = NULL;
info->dynstr = NULL;
+ info->canonical_dynsym = NULL;
info->dynrel = NULL;
+ info->canonical_dynrel = NULL;
obj_aout_dynamic_info (abfd) = (PTR) info;
/* This code used to look for the __DYNAMIC symbol to locate the dynamic
return true;
}
+/* Return the amount of memory required for the dynamic symbols. */
+
+static long
+sunos_get_dynamic_symtab_upper_bound (abfd)
+ bfd *abfd;
+{
+ struct sunos_dynamic_info *info;
+
+ if (! sunos_read_dynamic_info (abfd))
+ return -1;
+
+ info = (struct sunos_dynamic_info *) obj_aout_dynamic_info (abfd);
+ if (! info->valid)
+ {
+ bfd_set_error (bfd_error_no_symbols);
+ return -1;
+ }
+
+ return (info->dynsym_count + 1) * sizeof (asymbol *);
+}
+
/* Read in the dynamic symbols. */
-static bfd_size_type
-MY(read_dynamic_symbols) (abfd, syms, strs, strsize)
+static long
+sunos_canonicalize_dynamic_symtab (abfd, storage)
bfd *abfd;
- struct external_nlist **syms;
- char **strs;
- bfd_size_type *strsize;
+ asymbol **storage;
{
struct sunos_dynamic_info *info;
+ long i;
- if (obj_aout_dynamic_info (abfd) == (PTR) NULL)
+ /* Get the general dynamic information. */
+ if (obj_aout_dynamic_info (abfd) == NULL)
{
if (! sunos_read_dynamic_info (abfd))
- return (bfd_size_type) -1;
+ return -1;
}
info = (struct sunos_dynamic_info *) obj_aout_dynamic_info (abfd);
- if (! info->valid || info->dynsym_count == 0)
- return 0;
+ if (! info->valid)
+ {
+ bfd_set_error (bfd_error_no_symbols);
+ return -1;
+ }
+ /* Get the dynamic nlist structures. */
if (info->dynsym == (struct external_nlist *) NULL)
{
info->dynsym = ((struct external_nlist *)
bfd_alloc (abfd,
(info->dynsym_count
* EXTERNAL_NLIST_SIZE)));
- info->dynstr = (char *) bfd_alloc (abfd, info->dyninfo.ld_symb_size);
- if (!info->dynsym || !info->dynstr)
+ if (info->dynsym == NULL && info->dynsym_count != 0)
{
bfd_set_error (bfd_error_no_memory);
- return 0;
+ return -1;
}
if (bfd_seek (abfd, info->dyninfo.ld_stab, SEEK_SET) != 0
|| (bfd_read ((PTR) info->dynsym, info->dynsym_count,
EXTERNAL_NLIST_SIZE, abfd)
- != info->dynsym_count * EXTERNAL_NLIST_SIZE)
- || bfd_seek (abfd, info->dyninfo.ld_symbols, SEEK_SET) != 0
+ != info->dynsym_count * EXTERNAL_NLIST_SIZE))
+ {
+ if (info->dynsym != NULL)
+ {
+ bfd_release (abfd, info->dynsym);
+ info->dynsym = NULL;
+ }
+ return -1;
+ }
+ }
+
+ /* Get the dynamic strings. */
+ if (info->dynstr == (char *) NULL)
+ {
+ info->dynstr = (char *) bfd_alloc (abfd, info->dyninfo.ld_symb_size);
+ if (info->dynstr == NULL && info->dyninfo.ld_symb_size != 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return -1;
+ }
+ if (bfd_seek (abfd, info->dyninfo.ld_symbols, SEEK_SET) != 0
|| (bfd_read ((PTR) info->dynstr, 1, info->dyninfo.ld_symb_size,
abfd)
!= info->dyninfo.ld_symb_size))
- return (bfd_size_type) -1;
+ {
+ if (info->dynstr != NULL)
+ {
+ bfd_release (abfd, info->dynstr);
+ info->dynstr = NULL;
+ }
+ return -1;
+ }
}
- *syms = info->dynsym;
- *strs = info->dynstr;
- *strsize = info->dyninfo.ld_symb_size;
-
#ifdef CHECK_DYNAMIC_HASH
/* Check my understanding of the dynamic hash table by making sure
that each symbol can be located in the hash table. */
abort ();
table_size = info->dyninfo.ld_stab - info->dyninfo.ld_hash;
table = (bfd_byte *) malloc (table_size);
- if (table == NULL)
+ if (table == NULL && table_size != 0)
abort ();
if (bfd_seek (abfd, info->dyninfo.ld_hash, SEEK_SET) != 0
|| bfd_read ((PTR) table, 1, table_size, abfd) != table_size)
hash = (hash << 1) + *name++;
hash &= 0x7fffffff;
hash %= info->dyninfo.ld_buckets;
- while (GET_WORD (abfd, table + 8 * hash) != i)
+ while (GET_WORD (abfd, table + hash * HASH_ENTRY_SIZE) != i)
{
- hash = GET_WORD (abfd, table + 8 * hash + 4);
- if (hash == 0 || hash >= table_size / 8)
+ hash = GET_WORD (abfd,
+ table + hash * HASH_ENTRY_SIZE + BYTES_IN_WORD);
+ if (hash == 0 || hash >= table_size / HASH_ENTRY_SIZE)
abort ();
}
}
}
#endif /* CHECK_DYNAMIC_HASH */
+ /* Get the asymbol structures corresponding to the dynamic nlist
+ structures. */
+ if (info->canonical_dynsym == (aout_symbol_type *) NULL)
+ {
+ info->canonical_dynsym = ((aout_symbol_type *)
+ bfd_alloc (abfd,
+ (info->dynsym_count
+ * sizeof (aout_symbol_type))));
+ if (info->canonical_dynsym == NULL && info->dynsym_count != 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return -1;
+ }
+
+ if (! aout_32_translate_symbol_table (abfd, info->canonical_dynsym,
+ info->dynsym, info->dynsym_count,
+ info->dynstr,
+ info->dyninfo.ld_symb_size,
+ true))
+ {
+ if (info->canonical_dynsym != NULL)
+ {
+ bfd_release (abfd, info->canonical_dynsym);
+ info->canonical_dynsym = NULL;
+ }
+ return -1;
+ }
+ }
+
+ /* Return pointers to the dynamic asymbol structures. */
+ for (i = 0; i < info->dynsym_count; i++)
+ *storage++ = (asymbol *) (info->canonical_dynsym + i);
+ *storage = NULL;
+
return info->dynsym_count;
}
-/* Read in the dynamic relocs for a section. */
+/* Return the amount of memory required for the dynamic relocs. */
+
+static long
+sunos_get_dynamic_reloc_upper_bound (abfd)
+ bfd *abfd;
+{
+ struct sunos_dynamic_info *info;
+
+ if (! sunos_read_dynamic_info (abfd))
+ return -1;
+
+ info = (struct sunos_dynamic_info *) obj_aout_dynamic_info (abfd);
+ if (! info->valid)
+ {
+ bfd_set_error (bfd_error_no_symbols);
+ return -1;
+ }
+
+ return (info->dynrel_count + 1) * sizeof (arelent *);
+}
+
+/* Read in the dynamic relocs. */
-static bfd_size_type
-MY(read_dynamic_relocs) (abfd, relocs)
+static long
+sunos_canonicalize_dynamic_reloc (abfd, storage, syms)
bfd *abfd;
- PTR *relocs;
+ arelent **storage;
+ asymbol **syms;
{
struct sunos_dynamic_info *info;
+ long i;
+ /* Get the general dynamic information. */
if (obj_aout_dynamic_info (abfd) == (PTR) NULL)
{
if (! sunos_read_dynamic_info (abfd))
- return (bfd_size_type) -1;
+ return -1;
}
info = (struct sunos_dynamic_info *) obj_aout_dynamic_info (abfd);
- if (! info->valid || info->dynrel_count == 0)
- return 0;
+ if (! info->valid)
+ {
+ bfd_set_error (bfd_error_no_symbols);
+ return -1;
+ }
+ /* Get the dynamic reloc information. */
if (info->dynrel == NULL)
{
info->dynrel = (PTR) bfd_alloc (abfd,
(info->dynrel_count
* obj_reloc_entry_size (abfd)));
- if (!info->dynrel)
+ if (info->dynrel == NULL && info->dynrel_count != 0)
{
bfd_set_error (bfd_error_no_memory);
- return (bfd_size_type) -1;
+ return -1;
}
if (bfd_seek (abfd, info->dyninfo.ld_rel, SEEK_SET) != 0
|| (bfd_read ((PTR) info->dynrel, info->dynrel_count,
obj_reloc_entry_size (abfd), abfd)
!= info->dynrel_count * obj_reloc_entry_size (abfd)))
- return (bfd_size_type) -1;
+ {
+ if (info->dynrel != NULL)
+ {
+ bfd_release (abfd, info->dynrel);
+ info->dynrel = NULL;
+ }
+ return -1;
+ }
+ }
+
+ /* Get the arelent structures corresponding to the dynamic reloc
+ information. */
+ if (info->canonical_dynrel == (arelent *) NULL)
+ {
+ arelent *to;
+
+ info->canonical_dynrel = ((arelent *)
+ bfd_alloc (abfd,
+ (info->dynrel_count
+ * sizeof (arelent))));
+ if (info->canonical_dynrel == NULL && info->dynrel_count != 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return -1;
+ }
+
+ to = info->canonical_dynrel;
+
+ if (obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE)
+ {
+ register struct reloc_ext_external *p;
+ struct reloc_ext_external *pend;
+
+ p = (struct reloc_ext_external *) info->dynrel;
+ pend = p + info->dynrel_count;
+ for (; p < pend; p++, to++)
+ NAME(aout,swap_ext_reloc_in) (abfd, p, to, syms);
+ }
+ else
+ {
+ register struct reloc_std_external *p;
+ struct reloc_std_external *pend;
+
+ p = (struct reloc_std_external *) info->dynrel;
+ pend = p + info->dynrel_count;
+ for (; p < pend; p++, to++)
+ NAME(aout,swap_std_reloc_in) (abfd, p, to, syms);
+ }
}
- *relocs = info->dynrel;
+ /* Return pointers to the dynamic arelent structures. */
+ for (i = 0; i < info->dynrel_count; i++)
+ *storage++ = info->canonical_dynrel + i;
+ *storage = NULL;
return info->dynrel_count;
}
+\f
+/* Code to handle linking of SunOS shared libraries. */
+
+/* A SPARC procedure linkage table entry is 12 bytes. The first entry
+ in the table is a jump which is filled in by the runtime linker.
+ The remaining entries are branches back to the first entry,
+ followed by an index into the relocation table encoded to look like
+ a sethi of %g0. */
+
+#define SPARC_PLT_ENTRY_SIZE (12)
+
+static bfd_byte sparc_plt_first_entry[SPARC_PLT_ENTRY_SIZE] =
+{
+ /* sethi %hi(0),%g1; address filled in by runtime linker. */
+ 0x3, 0, 0, 0,
+ /* jmp %g1; offset filled in by runtime linker. */
+ 0x81, 0xc0, 0x60, 0,
+ /* nop */
+ 0x1, 0, 0, 0
+};
+
+/* save %sp, -96, %sp */
+#define SPARC_PLT_ENTRY_WORD0 0x9de3bfa0
+/* call; address filled in later. */
+#define SPARC_PLT_ENTRY_WORD1 0x40000000
+/* sethi; reloc index filled in later. */
+#define SPARC_PLT_ENTRY_WORD2 0x01000000
+
+/* An m68k procedure linkage table entry is 8 bytes. The first entry
+ in the table is a jump which is filled in the by the runtime
+ linker. The remaining entries are branches back to the first
+ entry, followed by a two byte index into the relocation table. */
+
+#define M68K_PLT_ENTRY_SIZE (8)
+
+static bfd_byte m68k_plt_first_entry[M68K_PLT_ENTRY_SIZE] =
+{
+ /* jmps @# */
+ 0x4e, 0xf9,
+ /* Filled in by runtime linker with a magic address. */
+ 0, 0, 0, 0,
+ /* Not used? */
+ 0, 0
+};
+
+/* bsrl */
+#define M68K_PLT_ENTRY_WORD0 (0x61ff)
+/* Remaining words filled in later. */
+
+/* An entry in the SunOS linker hash table. */
+
+struct sunos_link_hash_entry
+{
+ struct aout_link_hash_entry root;
+
+ /* If this is a dynamic symbol, this is its index into the dynamic
+ symbol table. This is initialized to -1. As the linker looks at
+ the input files, it changes this to -2 if it will be added to the
+ dynamic symbol table. After all the input files have been seen,
+ the linker will know whether to build a dynamic symbol table; if
+ it does build one, this becomes the index into the table. */
+ long dynindx;
+
+ /* If this is a dynamic symbol, this is the index of the name in the
+ dynamic symbol string table. */
+ long dynstr_index;
+
+ /* Some linker flags. */
+ unsigned char flags;
+ /* Symbol is referenced by a regular object. */
+#define SUNOS_REF_REGULAR 01
+ /* Symbol is defined by a regular object. */
+#define SUNOS_DEF_REGULAR 02
+ /* Symbol is referenced by a dynamic object. */
+#define SUNOS_REF_DYNAMIC 010
+ /* Symbol is defined by a dynamic object. */
+#define SUNOS_DEF_DYNAMIC 020
+};
+
+/* The SunOS linker hash table. */
+
+struct sunos_link_hash_table
+{
+ struct aout_link_hash_table root;
+
+ /* The first dynamic object found during the link. */
+ bfd *dynobj;
+
+ /* The number of dynamic symbols. */
+ size_t dynsymcount;
+
+ /* The number of buckets in the hash table. */
+ size_t bucketcount;
+};
+
+/* Routine to create an entry in an SunOS link hash table. */
+
+static struct bfd_hash_entry *
+sunos_link_hash_newfunc (entry, table, string)
+ struct bfd_hash_entry *entry;
+ struct bfd_hash_table *table;
+ const char *string;
+{
+ struct sunos_link_hash_entry *ret = (struct sunos_link_hash_entry *) entry;
+
+ /* Allocate the structure if it has not already been allocated by a
+ subclass. */
+ if (ret == (struct sunos_link_hash_entry *) NULL)
+ ret = ((struct sunos_link_hash_entry *)
+ bfd_hash_allocate (table, sizeof (struct sunos_link_hash_entry)));
+ if (ret == (struct sunos_link_hash_entry *) NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return (struct bfd_hash_entry *) ret;
+ }
+
+ /* Call the allocation method of the superclass. */
+ ret = ((struct sunos_link_hash_entry *)
+ NAME(aout,link_hash_newfunc) ((struct bfd_hash_entry *) ret,
+ table, string));
+ if (ret != NULL)
+ {
+ /* Set local fields. */
+ ret->dynindx = -1;
+ ret->dynstr_index = -1;
+ ret->flags = 0;
+ }
+
+ return (struct bfd_hash_entry *) ret;
+}
+
+/* Create a SunOS link hash table. */
+
+static struct bfd_link_hash_table *
+sunos_link_hash_table_create (abfd)
+ bfd *abfd;
+{
+ struct sunos_link_hash_table *ret;
+
+ ret = ((struct sunos_link_hash_table *)
+ malloc (sizeof (struct sunos_link_hash_table)));
+ if (ret == (struct sunos_link_hash_table *) NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return (struct bfd_link_hash_table *) NULL;
+ }
+ if (! NAME(aout,link_hash_table_init) (&ret->root, abfd,
+ sunos_link_hash_newfunc))
+ {
+ free (ret);
+ return (struct bfd_link_hash_table *) NULL;
+ }
+
+ ret->dynobj = NULL;
+ ret->dynsymcount = 0;
+ ret->bucketcount = 0;
+
+ return &ret->root.root;
+}
+
+/* Look up an entry in an SunOS link hash table. */
+
+#define sunos_link_hash_lookup(table, string, create, copy, follow) \
+ ((struct sunos_link_hash_entry *) \
+ aout_link_hash_lookup (&(table)->root, (string), (create), (copy),\
+ (follow)))
+
+/* Traverse a SunOS link hash table. */
+
+#define sunos_link_hash_traverse(table, func, info) \
+ (aout_link_hash_traverse \
+ (&(table)->root, \
+ (boolean (*) PARAMS ((struct aout_link_hash_entry *, PTR))) (func), \
+ (info)))
+
+/* Get the SunOS link hash table from the info structure. This is
+ just a cast. */
+
+#define sunos_hash_table(p) ((struct sunos_link_hash_table *) ((p)->hash))
+
+static boolean sunos_scan_dynamic_symbol
+ PARAMS ((struct sunos_link_hash_entry *, PTR));
+
+/* Add dynamic symbols during a link. This is called by the a.out
+ backend linker when it encounters an object with the DYNAMIC flag
+ set. */
+
+static boolean
+sunos_add_dynamic_symbols (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ asection *s;
+
+ /* We do not want to include the sections in a dynamic object in the
+ output file. We hack by simply clobbering the list of sections
+ in the BFD. This could be handled more cleanly by, say, a new
+ section flag; the existing SEC_NEVER_LOAD flag is not the one we
+ want, because that one still implies that the section takes up
+ space in the output file. */
+ abfd->sections = NULL;
+
+ /* The native linker seems to just ignore dynamic objects when -r is
+ used. */
+ if (info->relocateable)
+ return true;
+
+ /* There's no hope of using a dynamic object which does not exactly
+ match the format of the output file. */
+ if (info->hash->creator != abfd->xvec)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
+ }
+
+ /* If this is the first dynamic object, create some new sections to
+ hold dynamic linking information. We need to put these sections
+ somewhere, and the first dynamic object is as good a place as
+ any. The linker script will look for these special section names
+ and put them in the right place in the output file. See
+ include/aout/sun4.h for more details of the dynamic linking
+ information. */
+ if (sunos_hash_table (info)->dynobj == NULL)
+ {
+ flagword flags;
+ asection *sdyn;
+
+ sunos_hash_table (info)->dynobj = abfd;
+
+ flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
+
+ /* The .dynamic section holds the basic dynamic information: the
+ sun4_dynamic structure, the dynamic debugger information, and
+ the sun4_dynamic_link structure. */
+ s = bfd_make_section (abfd, ".dynamic");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags)
+ || ! bfd_set_section_alignment (abfd, s, 2))
+ return false;
+ sdyn = s;
+
+ /* The .need section holds the list of names of shared objets
+ which must be included at runtime. The address of this
+ section is put in the ld_need field. */
+ s = bfd_make_section (abfd, ".need");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+ || ! bfd_set_section_alignment (abfd, s, 2))
+ return false;
+
+ /* The .rules section holds the path to search for shared
+ objects. The address of this section is put in the ld_rules
+ field. */
+ s = bfd_make_section (abfd, ".rules");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+ || ! bfd_set_section_alignment (abfd, s, 2))
+ return false;
+
+ /* The .got section holds the global offset table. I don't
+ really know how this works, actually. It seems to only be
+ used for PIC code. The address minus four is put in the
+ ld_got field. */
+ s = bfd_make_section (abfd, ".got");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags)
+ || ! bfd_set_section_alignment (abfd, s, 2))
+ return false;
+ s->_raw_size = BYTES_IN_WORD;
+
+ /* The .plt section holds the procedure linkage table. The
+ address is put in the ld_plt field. */
+ s = bfd_make_section (abfd, ".plt");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_CODE)
+ || ! bfd_set_section_alignment (abfd, s, 2))
+ return false;
+
+ /* The .dynrel section holds the dynamic relocs. The address is
+ put in the ld_rel field. */
+ s = bfd_make_section (abfd, ".dynrel");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+ || ! bfd_set_section_alignment (abfd, s, 2))
+ return false;
+
+ /* The .hash section holds the dynamic hash table. The address
+ is put in the ld_hash field. */
+ s = bfd_make_section (abfd, ".hash");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+ || ! bfd_set_section_alignment (abfd, s, 2))
+ return false;
+
+ /* The .dynsym section holds the dynamic symbols. The address
+ is put in the ld_stab field. */
+ s = bfd_make_section (abfd, ".dynsym");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+ || ! bfd_set_section_alignment (abfd, s, 2))
+ return false;
+
+ /* The .dynstr section holds the dynamic symbol string table.
+ The address is put in the ld_symbols field. */
+ s = bfd_make_section (abfd, ".dynstr");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+ || ! bfd_set_section_alignment (abfd, s, 2))
+ return false;
+ }
+
+ return true;
+}
+
+/* Function to add a single symbol to the linker hash table. This is
+ a wrapper around _bfd_generic_link_add_one_symbol which handles the
+ tweaking needed for dynamic linking support. */
+
+static boolean
+sunos_add_one_symbol (info, abfd, name, flags, section, value, string,
+ copy, collect, hashp)
+ struct bfd_link_info *info;
+ bfd *abfd;
+ const char *name;
+ flagword flags;
+ asection *section;
+ bfd_vma value;
+ const char *string;
+ boolean copy;
+ boolean collect;
+ struct bfd_link_hash_entry **hashp;
+{
+ struct sunos_link_hash_entry *h;
+ int new_flag;
+
+ h = sunos_link_hash_lookup (sunos_hash_table (info), name, true, copy,
+ false);
+ if (h == NULL)
+ return false;
+
+ if (hashp != NULL)
+ *hashp = (struct bfd_link_hash_entry *) h;
+
+ /* Treat a common symbol in a dynamic object as an undefined symbol.
+ We don't want to allocate space in .bss for it. */
+ if ((abfd->flags & DYNAMIC) != 0
+ && section == &bfd_com_section)
+ section = &bfd_und_section;
+
+ if (section != &bfd_und_section
+ && h->root.root.type != bfd_link_hash_new
+ && h->root.root.type != bfd_link_hash_undefined)
+ {
+ /* We are defining the symbol, and it is already defined. This
+ is a potential multiple definition error. */
+ if ((abfd->flags & DYNAMIC) != 0)
+ {
+ /* The definition we are adding is from a dynamic object.
+ We do not want this new definition to override the
+ existing definition, so we pretend it is just a
+ reference. */
+ section = &bfd_und_section;
+ }
+ else if ((h->root.root.type == bfd_link_hash_defined
+ && (h->root.root.u.def.section->owner->flags & DYNAMIC) != 0)
+ || (h->root.root.type == bfd_link_hash_common
+ && ((h->root.root.u.c.section->owner->flags & DYNAMIC)
+ != 0)))
+ {
+ /* The existing definition is from a dynamic object. We
+ want to override it with the definition we just found.
+ Clobber the existing definition. */
+ h->root.root.type = bfd_link_hash_new;
+ }
+ }
+
+ /* Do the usual procedure for adding a symbol. */
+ if (! _bfd_generic_link_add_one_symbol (info, abfd, name, flags, section,
+ value, string, copy, collect,
+ hashp))
+ return false;
+
+ /* Set a flag in the hash table entry indicating the type of
+ reference or definition we just found. Keep a count of the
+ number of dynamic symbols we find. A dynamic symbol is one which
+ is referenced or defined by both a regular object and a shared
+ object. */
+ if ((abfd->flags & DYNAMIC) == 0)
+ {
+ if (section == &bfd_und_section)
+ new_flag = SUNOS_REF_REGULAR;
+ else
+ new_flag = SUNOS_DEF_REGULAR;
+ }
+ else
+ {
+ if (section == &bfd_und_section)
+ new_flag = SUNOS_REF_DYNAMIC;
+ else
+ new_flag = SUNOS_DEF_DYNAMIC;
+ }
+ h->flags |= new_flag;
+
+ if (h->dynindx == -1
+ && (h->flags & (SUNOS_DEF_REGULAR | SUNOS_REF_REGULAR)) != 0)
+ {
+ ++sunos_hash_table (info)->dynsymcount;
+ h->dynindx = -2;
+ }
+
+ return true;
+}
+
+/* Record an assignment made to a symbol by a linker script. We need
+ this in case some dynamic object refers to this symbol. */
+
+boolean
+bfd_sunos_record_link_assignment (output_bfd, info, name)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ const char *name;
+{
+ struct sunos_link_hash_entry *h;
+
+ /* This is called after we have examined all the input objects. If
+ the symbol does not exist, it merely means that no object refers
+ to it, and we can just ignore it at this point. */
+ h = sunos_link_hash_lookup (sunos_hash_table (info), name,
+ false, false, false);
+ if (h == NULL)
+ return true;
+
+ h->flags |= SUNOS_DEF_REGULAR;
+
+ if (h->dynindx == -1)
+ {
+ ++sunos_hash_table (info)->dynsymcount;
+ h->dynindx = -2;
+ }
+
+ return true;
+}
+
+/* Set up the sizes and contents of the dynamic sections created in
+ sunos_add_dynamic_symbols. This is called by the SunOS linker
+ emulation before_allocation routine. We must set the sizes of the
+ sections before the linker sets the addresses of the various
+ sections. This unfortunately requires reading all the relocs so
+ that we can work out which ones need to become dynamic relocs. If
+ info->keep_memory is true, we keep the relocs in memory; otherwise,
+ we discard them, and will read them again later. */
+
+boolean
+bfd_sunos_size_dynamic_sections (output_bfd, info, sdynptr, sneedptr,
+ srulesptr)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ asection **sdynptr;
+ asection **sneedptr;
+ asection **srulesptr;
+{
+ bfd *dynobj;
+ size_t dynsymcount;
+ asection *s;
+ size_t bucketcount;
+ size_t hashalloc;
+ size_t i;
+ bfd *sub;
+
+ *sdynptr = NULL;
+ *sneedptr = NULL;
+ *srulesptr = NULL;
+
+ dynobj = sunos_hash_table (info)->dynobj;
+ dynsymcount = sunos_hash_table (info)->dynsymcount;
+
+ /* If there were no dynamic objects in the link, there is nothing to
+ do here. */
+ if (dynobj == NULL)
+ return true;
+
+ /* The .dynamic section is always the same size. */
+ s = bfd_get_section_by_name (dynobj, ".dynamic");
+ BFD_ASSERT (s != NULL);
+ s->_raw_size = (sizeof (struct external_sun4_dynamic)
+ + EXTERNAL_SUN4_DYNAMIC_DEBUGGER_SIZE
+ + sizeof (struct external_sun4_dynamic_link));
+
+ /* Set the size of the .dynsym and .hash sections. We counted the
+ number of dynamic symbols as we read the input files. We will
+ build the dynamic symbol table (.dynsym) and the hash table
+ (.hash) when we build the final symbol table, because until then
+ we do not know the correct value to give the symbols. We build
+ the dynamic symbol string table (.dynstr) in a traversal of the
+ symbol table using sunos_scan_dynamic_symbol. */
+ s = bfd_get_section_by_name (dynobj, ".dynsym");
+ BFD_ASSERT (s != NULL);
+ s->_raw_size = dynsymcount * sizeof (struct external_nlist);
+ s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
+ if (s->contents == NULL && s->_raw_size != 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+
+ /* The number of buckets is just the number of symbols divided by
+ four. The compute the final size of the hash table, we must
+ actually compute the hash table. Normally we need exactly as
+ many entries in the hash table as there are dynamic symbols, but
+ if some of the buckets are not used we will need additional
+ entries. In the worse case, every symbol will hash to the same
+ bucket, and we will need BUCKETCOUNT - 1 extra entries. */
+ if (dynsymcount >= 4)
+ bucketcount = dynsymcount / 4;
+ else if (dynsymcount > 0)
+ bucketcount = dynsymcount;
+ else
+ bucketcount = 1;
+ s = bfd_get_section_by_name (dynobj, ".hash");
+ BFD_ASSERT (s != NULL);
+ hashalloc = (dynsymcount + bucketcount - 1) * HASH_ENTRY_SIZE;
+ s->contents = bfd_alloc (dynobj, hashalloc);
+ if (s->contents == NULL && dynsymcount > 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ memset (s->contents, 0, hashalloc);
+ for (i = 0; i < bucketcount; i++)
+ PUT_WORD (output_bfd, (bfd_vma) -1, s->contents + i * HASH_ENTRY_SIZE);
+ s->_raw_size = bucketcount * HASH_ENTRY_SIZE;
+
+ sunos_hash_table (info)->bucketcount = bucketcount;
+
+ /* Look through all the input BFD's and read their relocs. It would
+ be better if we didn't have to do this, but there is no other way
+ to determine the number of dynamic relocs we need, and, more
+ importantly, there is no other way to know which symbols should
+ get an entry in the procedure linkage table. */
+ for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
+ {
+ if ((sub->flags & DYNAMIC) == 0)
+ {
+ if (! sunos_scan_relocs (info, sub, obj_textsec (sub),
+ exec_hdr (sub)->a_trsize)
+ || ! sunos_scan_relocs (info, sub, obj_datasec (sub),
+ exec_hdr (sub)->a_drsize))
+ return false;
+ }
+ }
+
+ /* Scan all the symbols, place them in the dynamic symbol table, and
+ build the dynamic hash table. We reuse dynsymcount as a counter
+ for the number of symbols we have added so far. */
+ sunos_hash_table (info)->dynsymcount = 0;
+ sunos_link_hash_traverse (sunos_hash_table (info),
+ sunos_scan_dynamic_symbol,
+ (PTR) info);
+ BFD_ASSERT (sunos_hash_table (info)->dynsymcount == dynsymcount);
+
+ /* The SunOS native linker seems to align the total size of the
+ symbol strings to a multiple of 8. I don't know if this is
+ important, but it can't hurt much. */
+ s = bfd_get_section_by_name (dynobj, ".dynstr");
+ BFD_ASSERT (s != NULL);
+ if ((s->_raw_size & 7) != 0)
+ {
+ bfd_size_type add;
+ bfd_byte *contents;
+
+ add = 8 - (s->_raw_size & 7);
+ contents = realloc (s->contents, s->_raw_size + add);
+ if (contents == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ memset (contents + s->_raw_size, 0, add);
+ s->contents = contents;
+ s->_raw_size += add;
+ }
+
+ /* Now that we have worked out the sizes of the procedure linkage
+ table and the dynamic relocs, allocate storage for them. */
+ s = bfd_get_section_by_name (dynobj, ".plt");
+ BFD_ASSERT (s != NULL);
+ if (s->_raw_size != 0)
+ {
+ s->contents = bfd_alloc (dynobj, s->_raw_size);
+ if (s->contents == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+
+ /* Fill in the first entry in the table. */
+ switch (bfd_get_arch (dynobj))
+ {
+ case bfd_arch_sparc:
+ memcpy (s->contents, sparc_plt_first_entry, SPARC_PLT_ENTRY_SIZE);
+ break;
+
+ case bfd_arch_m68k:
+ memcpy (s->contents, m68k_plt_first_entry, M68K_PLT_ENTRY_SIZE);
+ break;
+
+ default:
+ abort ();
+ }
+ }
+
+ s = bfd_get_section_by_name (dynobj, ".dynrel");
+ if (s->_raw_size != 0)
+ {
+ s->contents = bfd_alloc (dynobj, s->_raw_size);
+ if (s->contents == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ }
+ /* We use the reloc_count field to keep track of how many of the
+ relocs we have output so far. */
+ s->reloc_count = 0;
+
+ /* Make space for the global offset table. */
+ s = bfd_get_section_by_name (dynobj, ".got");
+ s->contents = bfd_alloc (dynobj, s->_raw_size);
+ if (s->contents == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+
+ *sdynptr = bfd_get_section_by_name (dynobj, ".dynamic");
+ *sneedptr = bfd_get_section_by_name (dynobj, ".need");
+ *srulesptr = bfd_get_section_by_name (dynobj, ".rules");
+
+ return true;
+}
+
+/* Scan the relocs for an input section. */
+
+static boolean
+sunos_scan_relocs (info, abfd, sec, rel_size)
+ struct bfd_link_info *info;
+ bfd *abfd;
+ asection *sec;
+ bfd_size_type rel_size;
+{
+ PTR relocs;
+ PTR free_relocs = NULL;
+
+ if (rel_size == 0)
+ return true;
+
+ if (! info->keep_memory)
+ relocs = free_relocs = malloc (rel_size);
+ else
+ {
+ aout_section_data (sec) =
+ ((struct aout_section_data_struct *)
+ bfd_alloc (abfd, sizeof (struct aout_section_data_struct)));
+ if (aout_section_data (sec) == NULL)
+ relocs = NULL;
+ else
+ relocs = aout_section_data (sec)->relocs = malloc (rel_size);
+ }
+ if (relocs == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+
+ if (bfd_seek (abfd, sec->rel_filepos, SEEK_SET) != 0
+ || bfd_read (relocs, 1, rel_size, abfd) != rel_size)
+ goto error_return;
+
+ if (obj_reloc_entry_size (abfd) == RELOC_STD_SIZE)
+ {
+ if (! sunos_scan_std_relocs (info, abfd, sec,
+ (struct reloc_std_external *) relocs,
+ rel_size))
+ goto error_return;
+ }
+ else
+ {
+ if (! sunos_scan_ext_relocs (info, abfd, sec,
+ (struct reloc_ext_external *) relocs,
+ rel_size))
+ goto error_return;
+ }
+
+ if (free_relocs != NULL)
+ free (free_relocs);
+
+ return true;
+
+ error_return:
+ if (free_relocs != NULL)
+ free (free_relocs);
+ return false;
+}
+
+/* Scan the relocs for an input section using standard relocs. We
+ need to figure out what to do for each reloc against a dynamic
+ symbol. If the symbol is in the .text section, an entry is made in
+ the procedure linkage table. Note that this will do the wrong
+ thing if the symbol is actually data; I don't think the Sun 3
+ native linker handles this case correctly either. If the symbol is
+ not in the .text section, we must preserve the reloc as a dynamic
+ reloc. FIXME: We should also handle the PIC relocs here by
+ building global offset table entries. */
+
+static boolean
+sunos_scan_std_relocs (info, abfd, sec, relocs, rel_size)
+ struct bfd_link_info *info;
+ bfd *abfd;
+ asection *sec;
+ const struct reloc_std_external *relocs;
+ bfd_size_type rel_size;
+{
+ bfd *dynobj;
+ asection *splt;
+ asection *srel;
+ struct sunos_link_hash_entry **sym_hashes;
+ const struct reloc_std_external *rel, *relend;
+
+ /* We only know how to handle m68k plt entries. */
+ if (bfd_get_arch (abfd) != bfd_arch_m68k)
+ {
+ bfd_set_error (bfd_error_invalid_target);
+ return false;
+ }
+
+ dynobj = sunos_hash_table (info)->dynobj;
+ splt = bfd_get_section_by_name (dynobj, ".plt");
+ srel = bfd_get_section_by_name (dynobj, ".dynrel");
+ BFD_ASSERT (splt != NULL && srel != NULL);
+ sym_hashes = (struct sunos_link_hash_entry **) obj_aout_sym_hashes (abfd);
+
+ relend = relocs + rel_size / RELOC_STD_SIZE;
+ for (rel = relocs; rel < relend; rel++)
+ {
+ int r_index;
+ struct sunos_link_hash_entry *h;
+
+ /* We only want relocs against external symbols. */
+ if (abfd->xvec->header_byteorder_big_p)
+ {
+ if ((rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG) == 0)
+ continue;
+ }
+ else
+ {
+ if ((rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE) == 0)
+ continue;
+ }
+
+ /* Get the symbol index. */
+ if (abfd->xvec->header_byteorder_big_p)
+ {
+ r_index = ((rel->r_index[0] << 16)
+ | (rel->r_index[1] << 8)
+ | rel->r_index[2]);
+ }
+ else
+ {
+ r_index = ((rel->r_index[2] << 16)
+ | (rel->r_index[1] << 8)
+ | rel->r_index[0]);
+ }
+
+ /* Get the hash table entry. */
+ h = sym_hashes[r_index];
+ if (h == NULL)
+ {
+ /* This should not normally happen, but it will in any case
+ be caught in the relocation phase. */
+ continue;
+ }
+
+ /* At this point common symbols have already been allocated, so
+ we don't have to worry about them. We need to consider that
+ we may have already seen this symbol and marked it undefined;
+ if the symbols is really undefined, then SUNOS_DEF_DYNAMIC
+ will be zero. */
+ if (h->root.root.type != bfd_link_hash_defined
+ && h->root.root.type != bfd_link_hash_undefined)
+ continue;
+
+ if ((h->flags & SUNOS_DEF_DYNAMIC) == 0
+ || (h->flags & SUNOS_DEF_REGULAR) != 0)
+ continue;
+
+ BFD_ASSERT ((h->flags & SUNOS_REF_REGULAR) != 0);
+ BFD_ASSERT (h->root.root.type == bfd_link_hash_defined
+ ? (h->root.root.u.def.section->owner->flags & DYNAMIC) != 0
+ : (h->root.root.u.undef.abfd->flags & DYNAMIC) != 0);
+
+ /* This reloc is against a symbol defined only by a dynamic
+ object. */
+
+ if (h->root.root.type == bfd_link_hash_undefined)
+ {
+ /* Presumably this symbol was marked as being undefined by
+ an earlier reloc. */
+ srel->_raw_size += RELOC_STD_SIZE;
+ }
+ else if ((h->root.root.u.def.section->flags & SEC_CODE) == 0)
+ {
+ bfd *sub;
+
+ /* This reloc is not in the .text section. It must be
+ copied into the dynamic relocs. We mark the symbol as
+ being undefined. */
+ srel->_raw_size += RELOC_STD_SIZE;
+ sub = h->root.root.u.def.section->owner;
+ h->root.root.type = bfd_link_hash_undefined;
+ h->root.root.u.undef.abfd = sub;
+ }
+ else
+ {
+ /* This symbol is in the .text section. We must give it an
+ entry in the procedure linkage table, if we have not
+ already done so. We change the definition of the symbol
+ to the .plt section; this will cause relocs against it to
+ be handled correctly. */
+ if (h->root.root.u.def.section != splt)
+ {
+ if (splt->_raw_size == 0)
+ splt->_raw_size = M68K_PLT_ENTRY_SIZE;
+ h->root.root.u.def.section = splt;
+ h->root.root.u.def.value = splt->_raw_size;
+ splt->_raw_size += M68K_PLT_ENTRY_SIZE;
+
+ /* We will also need a dynamic reloc entry. */
+ srel->_raw_size += RELOC_STD_SIZE;
+ }
+ }
+ }
+
+ return true;
+}
+
+/* Scan the relocs for an input section using extended relocs. We
+ need to figure out what to do for each reloc against a dynamic
+ symbol. If the reloc is a WDISP30, and the symbol is in the .text
+ section, an entry is made in the procedure linkage table.
+ Otherwise, we must preserve the reloc as a dynamic reloc. FIXME:
+ We should also handle the PIC relocs here by building global offset
+ table entries. */
+
+static boolean
+sunos_scan_ext_relocs (info, abfd, sec, relocs, rel_size)
+ struct bfd_link_info *info;
+ bfd *abfd;
+ asection *sec;
+ const struct reloc_ext_external *relocs;
+ bfd_size_type rel_size;
+{
+ bfd *dynobj;
+ asection *splt;
+ asection *srel;
+ struct sunos_link_hash_entry **sym_hashes;
+ const struct reloc_ext_external *rel, *relend;
+
+ /* We only know how to handle SPARC plt entries. */
+ if (bfd_get_arch (abfd) != bfd_arch_sparc)
+ {
+ bfd_set_error (bfd_error_invalid_target);
+ return false;
+ }
+
+ dynobj = sunos_hash_table (info)->dynobj;
+ splt = bfd_get_section_by_name (dynobj, ".plt");
+ srel = bfd_get_section_by_name (dynobj, ".dynrel");
+ BFD_ASSERT (splt != NULL && srel != NULL);
+ sym_hashes = (struct sunos_link_hash_entry **) obj_aout_sym_hashes (abfd);
+
+ relend = relocs + rel_size / RELOC_EXT_SIZE;
+ for (rel = relocs; rel < relend; rel++)
+ {
+ int r_index;
+ int r_type;
+ struct sunos_link_hash_entry *h;
+
+ /* We only want relocs against external symbols. */
+ if (abfd->xvec->header_byteorder_big_p)
+ {
+ if ((rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG) == 0)
+ continue;
+ }
+ else
+ {
+ if ((rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE) == 0)
+ continue;
+ }
+
+ /* Get the symbol index and reloc type. */
+ if (abfd->xvec->header_byteorder_big_p)
+ {
+ r_index = ((rel->r_index[0] << 16)
+ | (rel->r_index[1] << 8)
+ | rel->r_index[2]);
+ r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
+ >> RELOC_EXT_BITS_TYPE_SH_BIG);
+ }
+ else
+ {
+ r_index = ((rel->r_index[2] << 16)
+ | (rel->r_index[1] << 8)
+ | rel->r_index[0]);
+ r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
+ >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
+ }
+
+ /* Get the hash table entry. */
+ h = sym_hashes[r_index];
+ if (h == NULL)
+ {
+ /* This should not normally happen, but it will in any case
+ be caught in the relocation phase. */
+ continue;
+ }
+
+ /* At this point common symbols have already been allocated, so
+ we don't have to worry about them. We need to consider that
+ we may have already seen this symbol and marked it undefined;
+ if the symbols is really undefined, then SUNOS_DEF_DYNAMIC
+ will be zero. */
+ if (h->root.root.type != bfd_link_hash_defined
+ && h->root.root.type != bfd_link_hash_undefined)
+ continue;
+
+ if ((h->flags & SUNOS_DEF_DYNAMIC) == 0
+ || (h->flags & SUNOS_DEF_REGULAR) != 0)
+ continue;
+
+ BFD_ASSERT ((h->flags & SUNOS_REF_REGULAR) != 0);
+ BFD_ASSERT (h->root.root.type == bfd_link_hash_defined
+ ? (h->root.root.u.def.section->owner->flags & DYNAMIC) != 0
+ : (h->root.root.u.undef.abfd->flags & DYNAMIC) != 0);
+
+ /* This reloc is against a symbol defined only by a dynamic
+ object. */
+
+ if (h->root.root.type == bfd_link_hash_undefined)
+ {
+ /* Presumably this symbol was marked as being undefined by
+ an earlier reloc. */
+ srel->_raw_size += RELOC_EXT_SIZE;
+ }
+ else if ((h->root.root.u.def.section->flags & SEC_CODE) == 0)
+ {
+ bfd *sub;
+
+ /* This reloc is not in the .text section. It must be
+ copied into the dynamic relocs. We mark the symbol as
+ being undefined. */
+ srel->_raw_size += RELOC_EXT_SIZE;
+ sub = h->root.root.u.def.section->owner;
+ h->root.root.type = bfd_link_hash_undefined;
+ h->root.root.u.undef.abfd = sub;
+ }
+ else
+ {
+ /* This symbol is in the .text section. We must give it an
+ entry in the procedure linkage table, if we have not
+ already done so. We change the definition of the symbol
+ to the .plt section; this will cause relocs against it to
+ be handled correctly. */
+ if (h->root.root.u.def.section != splt)
+ {
+ if (splt->_raw_size == 0)
+ splt->_raw_size = SPARC_PLT_ENTRY_SIZE;
+ h->root.root.u.def.section = splt;
+ h->root.root.u.def.value = splt->_raw_size;
+ splt->_raw_size += SPARC_PLT_ENTRY_SIZE;
+
+ /* We will also need a dynamic reloc entry. */
+ srel->_raw_size += RELOC_EXT_SIZE;
+ }
+ }
+ }
+
+ return true;
+}
+
+/* Build the hash table of dynamic symbols, and to mark as written all
+ symbols from dynamic objects which we do not plan to write out. */
+
+static boolean
+sunos_scan_dynamic_symbol (h, data)
+ struct sunos_link_hash_entry *h;
+ PTR data;
+{
+ struct bfd_link_info *info = (struct bfd_link_info *) data;
+
+ /* Set the written flag for symbols we do not want to write out as
+ part of the regular symbol table. This is all symbols which are
+ not defined in a regular object file. For some reason symbols
+ which are referenced by a regular object and defined by a dynamic
+ object do not seem to show up in the regular symbol table. */
+ if ((h->flags & SUNOS_DEF_REGULAR) == 0)
+ h->root.root.written = true;
+
+ /* If this symbol is defined by a dynamic object and referenced by a
+ regular object, see whether we gave it a reasonable value while
+ scanning the relocs. */
+
+ if ((h->flags & SUNOS_DEF_REGULAR) == 0
+ && (h->flags & SUNOS_DEF_DYNAMIC) != 0
+ && (h->flags & SUNOS_REF_REGULAR) != 0)
+ {
+ if (h->root.root.type == bfd_link_hash_defined
+ && ((h->root.root.u.def.section->owner->flags & DYNAMIC) != 0)
+ && h->root.root.u.def.section->output_section == NULL)
+ {
+ bfd *sub;
+
+ /* This symbol is currently defined in a dynamic section
+ which is not being put into the output file. This
+ implies that there is no reloc against the symbol. I'm
+ not sure why this case would ever occur. In any case, we
+ change the symbol to be undefined. */
+ sub = h->root.root.u.def.section->owner;
+ h->root.root.type = bfd_link_hash_undefined;
+ h->root.root.u.undef.abfd = sub;
+ }
+ }
+
+ /* If this symbol is defined or referenced by a regular file, add it
+ to the dynamic symbols. */
+ if ((h->flags & (SUNOS_DEF_REGULAR | SUNOS_REF_REGULAR)) != 0)
+ {
+ asection *s;
+ size_t len;
+ bfd_byte *contents;
+ unsigned char *name;
+ unsigned long hash;
+ bfd *dynobj;
+
+ BFD_ASSERT (h->dynindx == -2);
+
+ h->dynindx = sunos_hash_table (info)->dynsymcount;
+ ++sunos_hash_table (info)->dynsymcount;
+
+ len = strlen (h->root.root.root.string);
+
+ /* We don't bother to construct a BFD hash table for the strings
+ which are the names of the dynamic symbols. Using a hash
+ table for the regular symbols is beneficial, because the
+ regular symbols includes the debugging symbols, which have
+ long names and are often duplicated in several object files.
+ There are no debugging symbols in the dynamic symbols. */
+ s = bfd_get_section_by_name (sunos_hash_table (info)->dynobj,
+ ".dynstr");
+ BFD_ASSERT (s != NULL);
+ if (s->contents == NULL)
+ contents = malloc (len + 1);
+ else
+ contents = realloc (s->contents, s->_raw_size + len + 1);
+ if (contents == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ s->contents = contents;
+
+ h->dynstr_index = s->_raw_size;
+ strcpy (contents + s->_raw_size, h->root.root.root.string);
+ s->_raw_size += len + 1;
+
+ /* Add it to the dynamic hash table. */
+ name = (unsigned char *) h->root.root.root.string;
+ hash = 0;
+ while (*name != '\0')
+ hash = (hash << 1) + *name++;
+ hash &= 0x7fffffff;
+ hash %= sunos_hash_table (info)->bucketcount;
+
+ dynobj = sunos_hash_table (info)->dynobj;
+ s = bfd_get_section_by_name (dynobj, ".hash");
+ BFD_ASSERT (s != NULL);
+
+ if (GET_SWORD (dynobj, s->contents + hash * HASH_ENTRY_SIZE) == -1)
+ PUT_WORD (dynobj, h->dynindx, s->contents + hash * HASH_ENTRY_SIZE);
+ else
+ {
+ bfd_vma next;
+
+ next = GET_WORD (dynobj,
+ (s->contents
+ + hash * HASH_ENTRY_SIZE
+ + BYTES_IN_WORD));
+ PUT_WORD (dynobj, s->_raw_size / HASH_ENTRY_SIZE,
+ s->contents + hash * HASH_ENTRY_SIZE + BYTES_IN_WORD);
+ PUT_WORD (dynobj, h->dynindx, s->contents + s->_raw_size);
+ PUT_WORD (dynobj, next, s->contents + s->_raw_size + BYTES_IN_WORD);
+ s->_raw_size += HASH_ENTRY_SIZE;
+ }
+ }
+
+ return true;
+}
+
+/* Link a dynamic object. We actually don't have anything to do at
+ this point. This entry point exists to prevent the regular linker
+ code from doing anything with the object. */
+
+/*ARGSUSED*/
+static boolean
+sunos_link_dynamic_object (info, abfd)
+ struct bfd_link_info *info;
+ bfd *abfd;
+{
+ return true;
+}
+
+
+/* Write out a dynamic symbol. This is called by the final traversal
+ over the symbol table. */
+
+static boolean
+sunos_write_dynamic_symbol (output_bfd, info, harg)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ struct aout_link_hash_entry *harg;
+{
+ struct sunos_link_hash_entry *h = (struct sunos_link_hash_entry *) harg;
+ boolean plt;
+ int type;
+ bfd_vma val;
+ asection *s;
+ struct external_nlist *outsym;
+
+ if (h->dynindx < 0)
+ return true;
+
+ plt = false;
+ switch (h->root.root.type)
+ {
+ default:
+ case bfd_link_hash_new:
+ abort ();
+ /* Avoid variable not initialized warnings. */
+ return true;
+ case bfd_link_hash_undefined:
+ type = N_UNDF | N_EXT;
+ val = 0;
+ break;
+ case bfd_link_hash_defined:
+ {
+ asection *sec;
+ asection *output_section;
+
+ sec = h->root.root.u.def.section;
+ output_section = sec->output_section;
+ BFD_ASSERT (output_section == &bfd_abs_section
+ || output_section->owner == output_bfd);
+ if (strcmp (sec->name, ".plt") == 0)
+ {
+ plt = true;
+ type = N_UNDF | N_EXT;
+ val = 0;
+ }
+ else
+ {
+ if (output_section == obj_textsec (output_bfd))
+ type = N_TEXT | N_EXT;
+ else if (output_section == obj_datasec (output_bfd))
+ type = N_DATA | N_EXT;
+ else if (output_section == obj_bsssec (output_bfd))
+ type = N_BSS | N_EXT;
+ else
+ type = N_ABS | N_EXT;
+ val = (h->root.root.u.def.value
+ + output_section->vma
+ + sec->output_offset);
+ }
+ }
+ break;
+ case bfd_link_hash_common:
+ type = N_UNDF | N_EXT;
+ val = h->root.root.u.c.size;
+ break;
+ case bfd_link_hash_indirect:
+ case bfd_link_hash_warning:
+ /* FIXME: Ignore these for now. The circumstances under which
+ they should be written out are not clear to me. */
+ return true;
+ }
+
+ s = bfd_get_section_by_name (sunos_hash_table (info)->dynobj, ".dynsym");
+ BFD_ASSERT (s != NULL);
+ outsym = ((struct external_nlist *)
+ (s->contents + h->dynindx * EXTERNAL_NLIST_SIZE));
+
+ bfd_h_put_8 (output_bfd, type, outsym->e_type);
+ bfd_h_put_8 (output_bfd, 0, outsym->e_other);
+
+ /* FIXME: The native linker doesn't use 0 for desc. It seems to use
+ one less than the desc value in the shared library, although that
+ seems unlikely. */
+ bfd_h_put_16 (output_bfd, 0, outsym->e_desc);
+
+ PUT_WORD (output_bfd, h->dynstr_index, outsym->e_strx);
+ PUT_WORD (output_bfd, val, outsym->e_value);
+
+ /* If this symbol is in the procedure linkage table, fill in the
+ table entry. */
+ if (plt)
+ {
+ bfd_byte *p;
+ asection *s;
+ bfd_vma r_address;
+
+ p = h->root.root.u.def.section->contents + h->root.root.u.def.value;
+
+ s = bfd_get_section_by_name (sunos_hash_table (info)->dynobj, ".dynrel");
+ BFD_ASSERT (s != NULL);
+
+ switch (bfd_get_arch (output_bfd))
+ {
+ case bfd_arch_sparc:
+ bfd_put_32 (output_bfd, SPARC_PLT_ENTRY_WORD0, p);
+ bfd_put_32 (output_bfd,
+ (SPARC_PLT_ENTRY_WORD1
+ + (((- (h->root.root.u.def.value + 4) >> 2)
+ & 0x3fffffff))),
+ p + 4);
+ bfd_put_32 (output_bfd, SPARC_PLT_ENTRY_WORD2 + s->reloc_count,
+ p + 8);
+ break;
+
+ case bfd_arch_m68k:
+ bfd_put_16 (output_bfd, M68K_PLT_ENTRY_WORD0, p);
+ bfd_put_32 (output_bfd, (- (h->root.root.u.def.value + 2)), p + 2);
+ bfd_put_16 (output_bfd, s->reloc_count, p + 6);
+ break;
+
+ default:
+ abort ();
+ }
+
+ /* We also need to add a jump table reloc. */
+ p = s->contents + s->reloc_count * obj_reloc_entry_size (output_bfd);
+ r_address = (h->root.root.u.def.section->output_section->vma
+ + h->root.root.u.def.section->output_offset
+ + h->root.root.u.def.value);
+ if (obj_reloc_entry_size (output_bfd) == RELOC_STD_SIZE)
+ {
+ struct reloc_std_external *srel;
+
+ srel = (struct reloc_std_external *) p;
+ PUT_WORD (output_bfd, r_address, srel->r_address);
+ if (output_bfd->xvec->header_byteorder_big_p)
+ {
+ srel->r_index[0] = h->dynindx >> 16;
+ srel->r_index[1] = h->dynindx >> 8;
+ srel->r_index[2] = h->dynindx;
+ srel->r_type[0] = (RELOC_STD_BITS_EXTERN_BIG
+ | RELOC_STD_BITS_JMPTABLE_BIG);
+ }
+ else
+ {
+ srel->r_index[2] = h->dynindx >> 16;
+ srel->r_index[1] = h->dynindx >> 8;
+ srel->r_index[0] = h->dynindx;
+ srel->r_type[0] = (RELOC_STD_BITS_EXTERN_LITTLE
+ | RELOC_STD_BITS_JMPTABLE_LITTLE);
+ }
+ }
+ else
+ {
+ struct reloc_ext_external *erel;
+
+ erel = (struct reloc_ext_external *) p;
+ PUT_WORD (output_bfd, r_address, erel->r_address);
+ if (output_bfd->xvec->header_byteorder_big_p)
+ {
+ erel->r_index[0] = h->dynindx >> 16;
+ erel->r_index[1] = h->dynindx >> 8;
+ erel->r_index[2] = h->dynindx;
+ erel->r_type[0] = (RELOC_EXT_BITS_EXTERN_BIG
+ | (22 << RELOC_EXT_BITS_TYPE_SH_BIG));
+ }
+ else
+ {
+ erel->r_index[2] = h->dynindx >> 16;
+ erel->r_index[1] = h->dynindx >> 8;
+ erel->r_index[0] = h->dynindx;
+ erel->r_type[0] = (RELOC_EXT_BITS_EXTERN_LITTLE
+ | (22 << RELOC_EXT_BITS_TYPE_SH_LITTLE));
+ }
+ PUT_WORD (output_bfd, (bfd_vma) 0, erel->r_addend);
+ }
+
+ ++s->reloc_count;
+ }
+
+ return true;
+}
+
+/* This is called for each reloc against an external symbol. If this
+ is a reloc which are are going to copy as a dynamic reloc, then
+ copy it over, and tell the caller to not bother processing this
+ reloc. */
+
+/*ARGSUSED*/
+static boolean
+sunos_check_dynamic_reloc (info, input_bfd, input_section, harg, reloc, skip)
+ struct bfd_link_info *info;
+ bfd *input_bfd;
+ asection *input_section;
+ struct aout_link_hash_entry *harg;
+ PTR reloc;
+ boolean *skip;
+{
+ struct sunos_link_hash_entry *h = (struct sunos_link_hash_entry *) harg;
+ bfd *dynobj;
+ asection *srel;
+ bfd_byte *p;
+
+ *skip = false;
+
+ dynobj = sunos_hash_table (info)->dynobj;
+
+ if (dynobj == NULL
+ || h->dynindx == -1
+ || h->root.root.type != bfd_link_hash_undefined
+ || (h->flags & SUNOS_DEF_REGULAR) != 0
+ || (h->flags & SUNOS_DEF_DYNAMIC) == 0
+ || (h->root.root.u.undef.abfd->flags & DYNAMIC) == 0)
+ return true;
+
+ /* It looks this is a reloc we are supposed to copy. */
+
+ srel = bfd_get_section_by_name (dynobj, ".dynrel");
+ BFD_ASSERT (srel != NULL);
+
+ p = srel->contents + srel->reloc_count * obj_reloc_entry_size (dynobj);
+
+ /* Copy the reloc over. */
+ memcpy (p, reloc, obj_reloc_entry_size (dynobj));
+
+ /* Adjust the address and symbol index. */
+ if (obj_reloc_entry_size (dynobj) == RELOC_STD_SIZE)
+ {
+ struct reloc_std_external *srel;
+
+ srel = (struct reloc_std_external *) p;
+ PUT_WORD (dynobj,
+ (GET_WORD (dynobj, srel->r_address)
+ + input_section->output_section->vma
+ + input_section->output_offset),
+ srel->r_address);
+ if (dynobj->xvec->header_byteorder_big_p)
+ {
+ srel->r_index[0] = h->dynindx >> 16;
+ srel->r_index[1] = h->dynindx >> 8;
+ srel->r_index[2] = h->dynindx;
+ }
+ else
+ {
+ srel->r_index[2] = h->dynindx >> 16;
+ srel->r_index[1] = h->dynindx >> 8;
+ srel->r_index[0] = h->dynindx;
+ }
+ }
+ else
+ {
+ struct reloc_ext_external *erel;
+
+ erel = (struct reloc_ext_external *) p;
+ PUT_WORD (dynobj,
+ (GET_WORD (dynobj, erel->r_address)
+ + input_section->output_section->vma
+ + input_section->output_offset),
+ erel->r_address);
+ if (dynobj->xvec->header_byteorder_big_p)
+ {
+ erel->r_index[0] = h->dynindx >> 16;
+ erel->r_index[1] = h->dynindx >> 8;
+ erel->r_index[2] = h->dynindx;
+ }
+ else
+ {
+ erel->r_index[2] = h->dynindx >> 16;
+ erel->r_index[1] = h->dynindx >> 8;
+ erel->r_index[0] = h->dynindx;
+ }
+ }
+
+ ++srel->reloc_count;
+
+ *skip = true;
+
+ return true;
+}
+
+/* Finish up the dynamic linking information. */
+
+static boolean
+sunos_finish_dynamic_link (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ bfd *dynobj;
+ asection *o;
+ asection *s;
+ asection *sdyn;
+ struct external_sun4_dynamic esd;
+ struct external_sun4_dynamic_link esdl;
+
+ dynobj = sunos_hash_table (info)->dynobj;
+ if (dynobj == NULL)
+ return true;
+
+ sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
+ BFD_ASSERT (sdyn != NULL);
+
+ /* Finish up the .need section. The linker emulation code filled it
+ in, but with offsets from the start of the section instead of
+ real addresses. Now that we know the section location, we can
+ fill in the final values. */
+ s = bfd_get_section_by_name (dynobj, ".need");
+ BFD_ASSERT (s != NULL);
+ if (s->_raw_size != 0)
+ {
+ file_ptr filepos;
+ bfd_byte *p;
+
+ filepos = s->output_section->filepos + s->output_offset;
+ p = s->contents;
+ while (1)
+ {
+ bfd_vma val;
+
+ PUT_WORD (dynobj, GET_WORD (dynobj, p) + filepos, p);
+ val = GET_WORD (dynobj, p + 12);
+ if (val == 0)
+ break;
+ PUT_WORD (dynobj, val + filepos, p + 12);
+ p += 16;
+ }
+ }
+
+ /* The first entry in the .got section is the address of the dynamic
+ information. */
+ s = bfd_get_section_by_name (dynobj, ".got");
+ BFD_ASSERT (s != NULL);
+ PUT_WORD (dynobj, sdyn->output_section->vma + sdyn->output_offset,
+ s->contents);
+
+ for (o = dynobj->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_HAS_CONTENTS) != 0
+ && o->contents != NULL)
+ {
+ BFD_ASSERT (o->output_section != NULL
+ && o->output_section->owner == abfd);
+ if (! bfd_set_section_contents (abfd, o->output_section,
+ o->contents, o->output_offset,
+ o->_raw_size))
+ return false;
+ }
+ }
+
+ /* Finish up the dynamic link information. */
+ PUT_WORD (dynobj, (bfd_vma) 3, esd.ld_version);
+ PUT_WORD (dynobj,
+ sdyn->output_section->vma + sdyn->output_offset + sizeof esd,
+ esd.ldd);
+ PUT_WORD (dynobj,
+ (sdyn->output_section->vma
+ + sdyn->output_offset
+ + sizeof esd
+ + EXTERNAL_SUN4_DYNAMIC_DEBUGGER_SIZE),
+ esd.ld);
+
+ if (! bfd_set_section_contents (abfd, sdyn->output_section, &esd,
+ sdyn->output_offset, sizeof esd))
+ return false;
+
+
+ PUT_WORD (dynobj, (bfd_vma) 0, esdl.ld_loaded);
+
+ s = bfd_get_section_by_name (dynobj, ".need");
+ BFD_ASSERT (s != NULL);
+ if (s->_raw_size == 0)
+ PUT_WORD (dynobj, (bfd_vma) 0, esdl.ld_need);
+ else
+ PUT_WORD (dynobj, s->output_section->filepos + s->output_offset,
+ esdl.ld_need);
+
+ s = bfd_get_section_by_name (dynobj, ".rules");
+ BFD_ASSERT (s != NULL);
+ if (s->_raw_size == 0)
+ PUT_WORD (dynobj, (bfd_vma) 0, esdl.ld_rules);
+ else
+ PUT_WORD (dynobj, s->output_section->filepos + s->output_offset,
+ esdl.ld_rules);
+
+ s = bfd_get_section_by_name (dynobj, ".got");
+ BFD_ASSERT (s != NULL);
+ PUT_WORD (dynobj, s->output_section->vma + s->output_offset, esdl.ld_got);
+
+ s = bfd_get_section_by_name (dynobj, ".plt");
+ BFD_ASSERT (s != NULL);
+ PUT_WORD (dynobj, s->output_section->vma + s->output_offset, esdl.ld_plt);
+ PUT_WORD (dynobj, s->_raw_size, esdl.ld_plt_sz);
+
+ s = bfd_get_section_by_name (dynobj, ".dynrel");
+ BFD_ASSERT (s != NULL);
+ BFD_ASSERT (s->reloc_count * obj_reloc_entry_size (dynobj) == s->_raw_size);
+ PUT_WORD (dynobj, s->output_section->filepos + s->output_offset,
+ esdl.ld_rel);
+
+ s = bfd_get_section_by_name (dynobj, ".hash");
+ BFD_ASSERT (s != NULL);
+ PUT_WORD (dynobj, s->output_section->filepos + s->output_offset,
+ esdl.ld_hash);
+
+ s = bfd_get_section_by_name (dynobj, ".dynsym");
+ BFD_ASSERT (s != NULL);
+ PUT_WORD (dynobj, s->output_section->filepos + s->output_offset,
+ esdl.ld_stab);
+
+ PUT_WORD (dynobj, (bfd_vma) 0, esdl.ld_stab_hash);
+
+ PUT_WORD (dynobj, (bfd_vma) sunos_hash_table (info)->bucketcount,
+ esdl.ld_buckets);
+
+ s = bfd_get_section_by_name (dynobj, ".dynstr");
+ BFD_ASSERT (s != NULL);
+ PUT_WORD (dynobj, s->output_section->filepos + s->output_offset,
+ esdl.ld_symbols);
+ PUT_WORD (dynobj, s->_raw_size, esdl.ld_symb_size);
+
+ /* The size of the text area is the size of the .text section
+ rounded up to a page boundary. FIXME: Should the page size be
+ conditional on something? */
+ PUT_WORD (dynobj,
+ BFD_ALIGN (obj_textsec (abfd)->_raw_size, 0x2000),
+ esdl.ld_text);
+
+ if (! bfd_set_section_contents (abfd, sdyn->output_section, &esdl,
+ (sdyn->output_offset
+ + sizeof esd
+ + EXTERNAL_SUN4_DYNAMIC_DEBUGGER_SIZE),
+ sizeof esdl))
+ return false;
+
+ abfd->flags |= DYNAMIC;
+
+ return true;
+}
projects / thirdparty / binutils-gdb.git / commitdiff
