diff options
Diffstat (limited to 'bfd/sunos.c')
| -rw-r--r-- | bfd/sunos.c | 1863 |
1 files changed, 1817 insertions, 46 deletions
diff --git a/bfd/sunos.c b/bfd/sunos.c index 21e4b2f..bb3671e 100644 --- a/bfd/sunos.c +++ b/bfd/sunos.c @@ -1,5 +1,5 @@ /* 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. @@ -23,18 +23,56 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #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" @@ -49,18 +87,27 @@ struct sunos_dynamic_info /* 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 @@ -72,8 +119,6 @@ sunos_read_dynamic_info (abfd) 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; @@ -83,6 +128,12 @@ sunos_read_dynamic_info (abfd) 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) @@ -93,7 +144,9 @@ sunos_read_dynamic_info (abfd) 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 @@ -165,54 +218,100 @@ sunos_read_dynamic_info (abfd) 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. */ @@ -225,7 +324,7 @@ MY(read_dynamic_symbols) (abfd, syms, strs, strsize) 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) @@ -242,10 +341,11 @@ MY(read_dynamic_symbols) (abfd, syms, strs, strsize) 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 (); } } @@ -253,46 +353,1717 @@ MY(read_dynamic_symbols) (abfd, syms, strs, strsize) } #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 bfd_size_type -MY(read_dynamic_relocs) (abfd, relocs) +static long +sunos_get_dynamic_reloc_upper_bound (abfd) bfd *abfd; - PTR *relocs; { 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 long +sunos_canonicalize_dynamic_reloc (abfd, storage, syms) + bfd *abfd; + 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; + } } - *relocs = info->dynrel; + /* 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); + } + } + + /* 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; } + +/* 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; +} |