diff options
Diffstat (limited to 'bfd/elf32-hppa.c')
| -rw-r--r-- | bfd/elf32-hppa.c | 4465 |
1 files changed, 0 insertions, 4465 deletions
diff --git a/bfd/elf32-hppa.c b/bfd/elf32-hppa.c deleted file mode 100644 index af08d8e010f..00000000000 --- a/bfd/elf32-hppa.c +++ /dev/null @@ -1,4465 +0,0 @@ -/* BFD back-end for HP PA-RISC ELF files. - Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2001 - Free Software Foundation, Inc. - - Original code by - Center for Software Science - Department of Computer Science - University of Utah - Largely rewritten by Alan Modra <alan@linuxcare.com.au> - -This file is part of BFD, the Binary File Descriptor library. - -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -#include "bfd.h" -#include "sysdep.h" -#include "libbfd.h" -#include "elf-bfd.h" -#include "elf/hppa.h" -#include "libhppa.h" -#include "elf32-hppa.h" -#define ARCH_SIZE 32 -#include "elf-hppa.h" -#include "elf32-hppa.h" - -/* In order to gain some understanding of code in this file without - knowing all the intricate details of the linker, note the - following: - - Functions named elf32_hppa_* are called by external routines, other - functions are only called locally. elf32_hppa_* functions appear - in this file more or less in the order in which they are called - from external routines. eg. elf32_hppa_check_relocs is called - early in the link process, elf32_hppa_finish_dynamic_sections is - one of the last functions. */ - -/* We use two hash tables to hold information for linking PA ELF objects. - - The first is the elf32_hppa_link_hash_table which is derived - from the standard ELF linker hash table. We use this as a place to - attach other hash tables and static information. - - The second is the stub hash table which is derived from the - base BFD hash table. The stub hash table holds the information - necessary to build the linker stubs during a link. - - There are a number of different stubs generated by the linker. - - Long branch stub: - : ldil LR'X,%r1 - : be,n RR'X(%sr4,%r1) - - PIC long branch stub: - : b,l .+8,%r1 - : addil LR'X - ($PIC_pcrel$0 - 4),%r1 - : be,n RR'X - ($PIC_pcrel$0 - 8)(%sr4,%r1) - - Import stub to call shared library routine from normal object file - (single sub-space version) - : addil LR'lt_ptr+ltoff,%dp ; get procedure entry point - : ldw RR'lt_ptr+ltoff(%r1),%r21 - : bv %r0(%r21) - : ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value. - - Import stub to call shared library routine from shared library - (single sub-space version) - : addil LR'ltoff,%r19 ; get procedure entry point - : ldw RR'ltoff(%r1),%r21 - : bv %r0(%r21) - : ldw RR'ltoff+4(%r1),%r19 ; get new dlt value. - - Import stub to call shared library routine from normal object file - (multiple sub-space support) - : addil LR'lt_ptr+ltoff,%dp ; get procedure entry point - : ldw RR'lt_ptr+ltoff(%r1),%r21 - : ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value. - : ldsid (%r21),%r1 - : mtsp %r1,%sr0 - : be 0(%sr0,%r21) ; branch to target - : stw %rp,-24(%sp) ; save rp - - Import stub to call shared library routine from shared library - (multiple sub-space support) - : addil LR'ltoff,%r19 ; get procedure entry point - : ldw RR'ltoff(%r1),%r21 - : ldw RR'ltoff+4(%r1),%r19 ; get new dlt value. - : ldsid (%r21),%r1 - : mtsp %r1,%sr0 - : be 0(%sr0,%r21) ; branch to target - : stw %rp,-24(%sp) ; save rp - - Export stub to return from shared lib routine (multiple sub-space support) - One of these is created for each exported procedure in a shared - library (and stored in the shared lib). Shared lib routines are - called via the first instruction in the export stub so that we can - do an inter-space return. Not required for single sub-space. - : bl,n X,%rp ; trap the return - : nop - : ldw -24(%sp),%rp ; restore the original rp - : ldsid (%rp),%r1 - : mtsp %r1,%sr0 - : be,n 0(%sr0,%rp) ; inter-space return */ - -#define PLT_ENTRY_SIZE 8 -#define PLABEL_PLT_ENTRY_SIZE PLT_ENTRY_SIZE -#define GOT_ENTRY_SIZE 4 -#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" - -static const bfd_byte plt_stub[] = -{ - 0x0e, 0x80, 0x10, 0x96, /* 1: ldw 0(%r20),%r22 */ - 0xea, 0xc0, 0xc0, 0x00, /* bv %r0(%r22) */ - 0x0e, 0x88, 0x10, 0x95, /* ldw 4(%r20),%r21 */ -#define PLT_STUB_ENTRY (3*4) - 0xea, 0x9f, 0x1f, 0xdd, /* b,l 1b,%r20 */ - 0xd6, 0x80, 0x1c, 0x1e, /* depi 0,31,2,%r20 */ - 0x00, 0xc0, 0xff, 0xee, /* 9: .word fixup_func */ - 0xde, 0xad, 0xbe, 0xef /* .word fixup_ltp */ -}; - -/* Section name for stubs is the associated section name plus this - string. */ -#define STUB_SUFFIX ".stub" - -/* Setting the following non-zero makes all long branch stubs - generated during a shared link of the PIC variety. This saves on - relocs, but costs one extra instruction per stub. */ -#ifndef LONG_BRANCH_PIC_IN_SHLIB -#define LONG_BRANCH_PIC_IN_SHLIB 1 -#endif - -/* Set this non-zero to use import stubs instead of long branch stubs - where a .plt entry exists for the symbol. This is a fairly useless - option as import stubs are bigger than PIC long branch stubs. */ -#ifndef LONG_BRANCH_VIA_PLT -#define LONG_BRANCH_VIA_PLT 0 -#endif - -/* We don't need to copy any PC- or GP-relative dynamic relocs into a - shared object's dynamic section. All the relocs of the limited - class we are interested in, are absolute. See check_relocs. */ -#ifndef IS_ABSOLUTE_RELOC -#define IS_ABSOLUTE_RELOC(r_type) 1 -#endif - -enum elf32_hppa_stub_type { - hppa_stub_long_branch, - hppa_stub_long_branch_shared, - hppa_stub_import, - hppa_stub_import_shared, - hppa_stub_export, - hppa_stub_none -}; - -struct elf32_hppa_stub_hash_entry { - - /* Base hash table entry structure. */ - struct bfd_hash_entry root; - - /* The stub section. */ - asection *stub_sec; - -#if ! LONG_BRANCH_PIC_IN_SHLIB - /* It's associated reloc section. */ - asection *reloc_sec; -#endif - - /* Offset within stub_sec of the beginning of this stub. */ - bfd_vma stub_offset; - - /* Given the symbol's value and its section we can determine its final - value when building the stubs (so the stub knows where to jump. */ - bfd_vma target_value; - asection *target_section; - - enum elf32_hppa_stub_type stub_type; - - /* The symbol table entry, if any, that this was derived from. */ - struct elf32_hppa_link_hash_entry *h; - - /* Where this stub is being called from, or, in the case of combined - stub sections, the first input section in the group. */ - asection *id_sec; -}; - -struct elf32_hppa_link_hash_entry { - - struct elf_link_hash_entry elf; - - /* A pointer to the most recently used stub hash entry against this - symbol. */ - struct elf32_hppa_stub_hash_entry *stub_cache; - -#if ! LONG_BRANCH_PIC_IN_SHLIB - /* Used to track whether we have allocated space for a long branch - stub relocation for this symbol in the given section. */ - asection *stub_reloc_sec; -#endif - - /* Used to count relocations for delayed sizing of relocation - sections. */ - struct elf32_hppa_dyn_reloc_entry { - - /* Next relocation in the chain. */ - struct elf32_hppa_dyn_reloc_entry *next; - - /* The section in dynobj. */ - asection *section; - - /* Number of relocs copied in this section. */ - bfd_size_type count; - } *reloc_entries; - - /* Set during a static link if we detect a function is PIC. */ - unsigned int maybe_pic_call:1; - - /* Set if the only reason we need a .plt entry is for a non-PIC to - PIC function call. */ - unsigned int pic_call:1; - - /* Set if this symbol is used by a plabel reloc. */ - unsigned int plabel:1; - - /* Set if this symbol is an init or fini function and thus should - use an absolute reloc. */ - unsigned int plt_abs:1; -}; - -struct elf32_hppa_link_hash_table { - - /* The main hash table. */ - struct elf_link_hash_table root; - - /* The stub hash table. */ - struct bfd_hash_table stub_hash_table; - - /* Linker stub bfd. */ - bfd *stub_bfd; - - /* Linker call-backs. */ - asection * (*add_stub_section) PARAMS ((const char *, asection *)); - void (*layout_sections_again) PARAMS ((void)); - - /* Array to keep track of which stub sections have been created, and - information on stub grouping. */ - struct map_stub { - /* This is the section to which stubs in the group will be - attached. */ - asection *link_sec; - /* The stub section. */ - asection *stub_sec; -#if ! LONG_BRANCH_PIC_IN_SHLIB - /* The stub section's reloc section. */ - asection *reloc_sec; -#endif - } *stub_group; - - /* Short-cuts to get to dynamic linker sections. */ - asection *sgot; - asection *srelgot; - asection *splt; - asection *srelplt; - asection *sdynbss; - asection *srelbss; - - /* Used during a final link to store the base of the text and data - segments so that we can perform SEGREL relocations. */ - bfd_vma text_segment_base; - bfd_vma data_segment_base; - - /* Whether we support multiple sub-spaces for shared libs. */ - unsigned int multi_subspace:1; - - /* Flags set when PCREL12F and PCREL17F branches detected. Used to - select suitable defaults for the stub group size. */ - unsigned int has_12bit_branch:1; - unsigned int has_17bit_branch:1; - - /* Set if we need a .plt stub to support lazy dynamic linking. */ - unsigned int need_plt_stub:1; -}; - -/* Various hash macros and functions. */ -#define hppa_link_hash_table(p) \ - ((struct elf32_hppa_link_hash_table *) ((p)->hash)) - -#define hppa_stub_hash_lookup(table, string, create, copy) \ - ((struct elf32_hppa_stub_hash_entry *) \ - bfd_hash_lookup ((table), (string), (create), (copy))) - -static struct bfd_hash_entry *stub_hash_newfunc - PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); - -static struct bfd_hash_entry *hppa_link_hash_newfunc - PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); - -static struct bfd_link_hash_table *elf32_hppa_link_hash_table_create - PARAMS ((bfd *)); - -/* Stub handling functions. */ -static char *hppa_stub_name - PARAMS ((const asection *, const asection *, - const struct elf32_hppa_link_hash_entry *, - const Elf_Internal_Rela *)); - -static struct elf32_hppa_stub_hash_entry *hppa_get_stub_entry - PARAMS ((const asection *, const asection *, - struct elf32_hppa_link_hash_entry *, - const Elf_Internal_Rela *, - struct elf32_hppa_link_hash_table *)); - -static struct elf32_hppa_stub_hash_entry *hppa_add_stub - PARAMS ((const char *, asection *, struct elf32_hppa_link_hash_table *)); - -static enum elf32_hppa_stub_type hppa_type_of_stub - PARAMS ((asection *, const Elf_Internal_Rela *, - struct elf32_hppa_link_hash_entry *, bfd_vma)); - -static boolean hppa_build_one_stub - PARAMS ((struct bfd_hash_entry *, PTR)); - -static boolean hppa_size_one_stub - PARAMS ((struct bfd_hash_entry *, PTR)); - -/* BFD and elf backend functions. */ -static boolean elf32_hppa_object_p PARAMS ((bfd *)); - -static boolean elf32_hppa_add_symbol_hook - PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, - const char **, flagword *, asection **, bfd_vma *)); - -static boolean elf32_hppa_create_dynamic_sections - PARAMS ((bfd *, struct bfd_link_info *)); - -static boolean elf32_hppa_check_relocs - PARAMS ((bfd *, struct bfd_link_info *, - asection *, const Elf_Internal_Rela *)); - -static asection *elf32_hppa_gc_mark_hook - PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, - struct elf_link_hash_entry *, Elf_Internal_Sym *)); - -static boolean elf32_hppa_gc_sweep_hook - PARAMS ((bfd *, struct bfd_link_info *, - asection *, const Elf_Internal_Rela *)); - -static void elf32_hppa_hide_symbol - PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); - -static boolean elf32_hppa_adjust_dynamic_symbol - PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); - -static boolean hppa_handle_PIC_calls - PARAMS ((struct elf_link_hash_entry *, PTR)); - -static boolean allocate_plt_and_got_and_discard_relocs - PARAMS ((struct elf_link_hash_entry *, PTR)); - -static boolean clobber_millicode_symbols - PARAMS ((struct elf_link_hash_entry *, struct bfd_link_info *)); - -static boolean elf32_hppa_size_dynamic_sections - PARAMS ((bfd *, struct bfd_link_info *)); - -static boolean elf32_hppa_final_link - PARAMS ((bfd *, struct bfd_link_info *)); - -static void hppa_record_segment_addr - PARAMS ((bfd *, asection *, PTR)); - -static bfd_reloc_status_type final_link_relocate - PARAMS ((asection *, bfd_byte *, const Elf_Internal_Rela *, - bfd_vma, struct elf32_hppa_link_hash_table *, asection *, - struct elf32_hppa_link_hash_entry *)); - -static boolean elf32_hppa_relocate_section - PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, - bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); - -static int hppa_unwind_entry_compare - PARAMS ((const PTR, const PTR)); - -static boolean elf32_hppa_finish_dynamic_symbol - PARAMS ((bfd *, struct bfd_link_info *, - struct elf_link_hash_entry *, Elf_Internal_Sym *)); - -static boolean elf32_hppa_finish_dynamic_sections - PARAMS ((bfd *, struct bfd_link_info *)); - -static void elf32_hppa_post_process_headers - PARAMS ((bfd *, struct bfd_link_info *)); - -static int elf32_hppa_elf_get_symbol_type - PARAMS ((Elf_Internal_Sym *, int)); - -/* Assorted hash table functions. */ - -/* Initialize an entry in the stub hash table. */ - -static struct bfd_hash_entry * -stub_hash_newfunc (entry, table, string) - struct bfd_hash_entry *entry; - struct bfd_hash_table *table; - const char *string; -{ - struct elf32_hppa_stub_hash_entry *ret; - - ret = (struct elf32_hppa_stub_hash_entry *) entry; - - /* Allocate the structure if it has not already been allocated by a - subclass. */ - if (ret == NULL) - { - ret = ((struct elf32_hppa_stub_hash_entry *) - bfd_hash_allocate (table, - sizeof (struct elf32_hppa_stub_hash_entry))); - if (ret == NULL) - return NULL; - } - - /* Call the allocation method of the superclass. */ - ret = ((struct elf32_hppa_stub_hash_entry *) - bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); - - if (ret) - { - /* Initialize the local fields. */ - ret->stub_sec = NULL; -#if ! LONG_BRANCH_PIC_IN_SHLIB - ret->reloc_sec = NULL; -#endif - ret->stub_offset = 0; - ret->target_value = 0; - ret->target_section = NULL; - ret->stub_type = hppa_stub_long_branch; - ret->h = NULL; - ret->id_sec = NULL; - } - - return (struct bfd_hash_entry *) ret; -} - -/* Initialize an entry in the link hash table. */ - -static struct bfd_hash_entry * -hppa_link_hash_newfunc (entry, table, string) - struct bfd_hash_entry *entry; - struct bfd_hash_table *table; - const char *string; -{ - struct elf32_hppa_link_hash_entry *ret; - - ret = (struct elf32_hppa_link_hash_entry *) entry; - - /* Allocate the structure if it has not already been allocated by a - subclass. */ - if (ret == NULL) - { - ret = ((struct elf32_hppa_link_hash_entry *) - bfd_hash_allocate (table, - sizeof (struct elf32_hppa_link_hash_entry))); - if (ret == NULL) - return NULL; - } - - /* Call the allocation method of the superclass. */ - ret = ((struct elf32_hppa_link_hash_entry *) - _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, - table, string)); - - if (ret) - { - /* Initialize the local fields. */ -#if ! LONG_BRANCH_PIC_IN_SHLIB - ret->stub_reloc_sec = NULL; -#endif - ret->stub_cache = NULL; - ret->reloc_entries = NULL; - ret->maybe_pic_call = 0; - ret->pic_call = 0; - ret->plabel = 0; - ret->plt_abs = 0; - } - - return (struct bfd_hash_entry *) ret; -} - -/* Create the derived linker hash table. The PA ELF port uses the derived - hash table to keep information specific to the PA ELF linker (without - using static variables). */ - -static struct bfd_link_hash_table * -elf32_hppa_link_hash_table_create (abfd) - bfd *abfd; -{ - struct elf32_hppa_link_hash_table *ret; - - ret = ((struct elf32_hppa_link_hash_table *) bfd_alloc (abfd, sizeof (*ret))); - if (ret == NULL) - return NULL; - - if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, hppa_link_hash_newfunc)) - { - bfd_release (abfd, ret); - return NULL; - } - - /* Init the stub hash table too. */ - if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc)) - return NULL; - - ret->stub_bfd = NULL; - ret->add_stub_section = NULL; - ret->layout_sections_again = NULL; - ret->stub_group = NULL; - ret->sgot = NULL; - ret->srelgot = NULL; - ret->splt = NULL; - ret->srelplt = NULL; - ret->sdynbss = NULL; - ret->srelbss = NULL; - ret->text_segment_base = (bfd_vma) -1; - ret->data_segment_base = (bfd_vma) -1; - ret->multi_subspace = 0; - ret->has_12bit_branch = 0; - ret->has_17bit_branch = 0; - ret->need_plt_stub = 0; - - return &ret->root.root; -} - -/* Build a name for an entry in the stub hash table. */ - -static char * -hppa_stub_name (input_section, sym_sec, hash, rel) - const asection *input_section; - const asection *sym_sec; - const struct elf32_hppa_link_hash_entry *hash; - const Elf_Internal_Rela *rel; -{ - char *stub_name; - size_t len; - - if (hash) - { - len = 8 + 1 + strlen (hash->elf.root.root.string) + 1 + 8 + 1; - stub_name = bfd_malloc (len); - if (stub_name != NULL) - { - sprintf (stub_name, "%08x_%s+%x", - input_section->id & 0xffffffff, - hash->elf.root.root.string, - (int) rel->r_addend & 0xffffffff); - } - } - else - { - len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; - stub_name = bfd_malloc (len); - if (stub_name != NULL) - { - sprintf (stub_name, "%08x_%x:%x+%x", - input_section->id & 0xffffffff, - sym_sec->id & 0xffffffff, - (int) ELF32_R_SYM (rel->r_info) & 0xffffffff, - (int) rel->r_addend & 0xffffffff); - } - } - return stub_name; -} - -/* Look up an entry in the stub hash. Stub entries are cached because - creating the stub name takes a bit of time. */ - -static struct elf32_hppa_stub_hash_entry * -hppa_get_stub_entry (input_section, sym_sec, hash, rel, hplink) - const asection *input_section; - const asection *sym_sec; - struct elf32_hppa_link_hash_entry *hash; - const Elf_Internal_Rela *rel; - struct elf32_hppa_link_hash_table *hplink; -{ - struct elf32_hppa_stub_hash_entry *stub_entry; - const asection *id_sec; - - /* If this input section is part of a group of sections sharing one - stub section, then use the id of the first section in the group. - Stub names need to include a section id, as there may well be - more than one stub used to reach say, printf, and we need to - distinguish between them. */ - id_sec = hplink->stub_group[input_section->id].link_sec; - - if (hash != NULL && hash->stub_cache != NULL - && hash->stub_cache->h == hash - && hash->stub_cache->id_sec == id_sec) - { - stub_entry = hash->stub_cache; - } - else - { - char *stub_name; - - stub_name = hppa_stub_name (id_sec, sym_sec, hash, rel); - if (stub_name == NULL) - return NULL; - - stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table, - stub_name, false, false); - if (stub_entry == NULL) - { - if (hash == NULL || hash->elf.root.type != bfd_link_hash_undefweak) - (*_bfd_error_handler) (_("%s(%s+0x%lx): cannot find stub entry %s"), - bfd_get_filename (input_section->owner), - input_section->name, - (long) rel->r_offset, - stub_name); - } - else - { - if (hash != NULL) - hash->stub_cache = stub_entry; - } - - free (stub_name); - } - - return stub_entry; -} - -/* Add a new stub entry to the stub hash. Not all fields of the new - stub entry are initialised. */ - -static struct elf32_hppa_stub_hash_entry * -hppa_add_stub (stub_name, section, hplink) - const char *stub_name; - asection *section; - struct elf32_hppa_link_hash_table *hplink; -{ - asection *link_sec; - asection *stub_sec; - struct elf32_hppa_stub_hash_entry *stub_entry; - - link_sec = hplink->stub_group[section->id].link_sec; - stub_sec = hplink->stub_group[section->id].stub_sec; - if (stub_sec == NULL) - { - stub_sec = hplink->stub_group[link_sec->id].stub_sec; - if (stub_sec == NULL) - { - size_t len; - char *s_name; - - len = strlen (link_sec->name) + sizeof (STUB_SUFFIX); - s_name = bfd_alloc (hplink->stub_bfd, len); - if (s_name == NULL) - return NULL; - - strcpy (s_name, link_sec->name); - strcpy (s_name + len - sizeof (STUB_SUFFIX), STUB_SUFFIX); - stub_sec = (*hplink->add_stub_section) (s_name, link_sec); - if (stub_sec == NULL) - return NULL; - hplink->stub_group[link_sec->id].stub_sec = stub_sec; - } - hplink->stub_group[section->id].stub_sec = stub_sec; - } - - /* Enter this entry into the linker stub hash table. */ - stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table, stub_name, - true, false); - if (stub_entry == NULL) - { - (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), - bfd_get_filename (section->owner), - stub_name); - return NULL; - } - - stub_entry->stub_sec = stub_sec; -#if ! LONG_BRANCH_PIC_IN_SHLIB - stub_entry->reloc_sec = hplink->stub_group[section->id].reloc_sec; -#endif - stub_entry->stub_offset = 0; - stub_entry->id_sec = link_sec; - return stub_entry; -} - -/* Determine the type of stub needed, if any, for a call. */ - -static enum elf32_hppa_stub_type -hppa_type_of_stub (input_sec, rel, hash, destination) - asection *input_sec; - const Elf_Internal_Rela *rel; - struct elf32_hppa_link_hash_entry *hash; - bfd_vma destination; -{ - bfd_vma location; - bfd_vma branch_offset; - bfd_vma max_branch_offset; - unsigned int r_type; - - if (hash != NULL - && (((hash->elf.root.type == bfd_link_hash_defined - || hash->elf.root.type == bfd_link_hash_defweak) - && hash->elf.root.u.def.section->output_section == NULL) - || (hash->elf.root.type == bfd_link_hash_defweak - && hash->elf.dynindx != -1 - && hash->elf.plt.offset != (bfd_vma) -1) - || hash->elf.root.type == bfd_link_hash_undefweak - || hash->elf.root.type == bfd_link_hash_undefined - || (hash->maybe_pic_call && !(input_sec->flags & SEC_HAS_GOT_REF)))) - { - /* If output_section is NULL, then it's a symbol defined in a - shared library. We will need an import stub. Decide between - hppa_stub_import and hppa_stub_import_shared later. For - shared links we need stubs for undefined or weak syms too; - They will presumably be resolved by the dynamic linker. */ - return hppa_stub_import; - } - - /* Determine where the call point is. */ - location = (input_sec->output_offset - + input_sec->output_section->vma - + rel->r_offset); - - branch_offset = destination - location - 8; - r_type = ELF32_R_TYPE (rel->r_info); - - /* Determine if a long branch stub is needed. parisc branch offsets - are relative to the second instruction past the branch, ie. +8 - bytes on from the branch instruction location. The offset is - signed and counts in units of 4 bytes. */ - if (r_type == (unsigned int) R_PARISC_PCREL17F) - { - max_branch_offset = (1 << (17-1)) << 2; - } - else if (r_type == (unsigned int) R_PARISC_PCREL12F) - { - max_branch_offset = (1 << (12-1)) << 2; - } - else /* R_PARISC_PCREL22F. */ - { - max_branch_offset = (1 << (22-1)) << 2; - } - - if (branch_offset + max_branch_offset >= 2*max_branch_offset) - { -#if LONG_BRANCH_VIA_PLT - if (hash != NULL - && hash->elf.dynindx != -1 - && hash->elf.plt.offset != (bfd_vma) -1 - && hash->elf.type != STT_PARISC_MILLI) - { - /* If we are doing a shared link and find we need a long - branch stub, then go via the .plt if possible. */ - return hppa_stub_import; - } - else -#endif - return hppa_stub_long_branch; - } - return hppa_stub_none; -} - -/* Build one linker stub as defined by the stub hash table entry GEN_ENTRY. - IN_ARG contains the link info pointer. */ - -#define LDIL_R1 0x20200000 /* ldil LR'XXX,%r1 */ -#define BE_SR4_R1 0xe0202002 /* be,n RR'XXX(%sr4,%r1) */ - -#define BL_R1 0xe8200000 /* b,l .+8,%r1 */ -#define ADDIL_R1 0x28200000 /* addil LR'XXX,%r1,%r1 */ -#define DEPI_R1 0xd4201c1e /* depi 0,31,2,%r1 */ - -#define ADDIL_DP 0x2b600000 /* addil LR'XXX,%dp,%r1 */ -#define LDW_R1_R21 0x48350000 /* ldw RR'XXX(%sr0,%r1),%r21 */ -#define BV_R0_R21 0xeaa0c000 /* bv %r0(%r21) */ -#define LDW_R1_R19 0x48330000 /* ldw RR'XXX(%sr0,%r1),%r19 */ - -#define ADDIL_R19 0x2a600000 /* addil LR'XXX,%r19,%r1 */ -#define LDW_R1_DP 0x483b0000 /* ldw RR'XXX(%sr0,%r1),%dp */ - -#define LDSID_R21_R1 0x02a010a1 /* ldsid (%sr0,%r21),%r1 */ -#define MTSP_R1 0x00011820 /* mtsp %r1,%sr0 */ -#define BE_SR0_R21 0xe2a00000 /* be 0(%sr0,%r21) */ -#define STW_RP 0x6bc23fd1 /* stw %rp,-24(%sr0,%sp) */ - -#define BL_RP 0xe8400002 /* b,l,n XXX,%rp */ -#define NOP 0x08000240 /* nop */ -#define LDW_RP 0x4bc23fd1 /* ldw -24(%sr0,%sp),%rp */ -#define LDSID_RP_R1 0x004010a1 /* ldsid (%sr0,%rp),%r1 */ -#define BE_SR0_RP 0xe0400002 /* be,n 0(%sr0,%rp) */ - -#ifndef R19_STUBS -#define R19_STUBS 1 -#endif - -#if R19_STUBS -#define LDW_R1_DLT LDW_R1_R19 -#else -#define LDW_R1_DLT LDW_R1_DP -#endif - -static boolean -hppa_build_one_stub (gen_entry, in_arg) - struct bfd_hash_entry *gen_entry; - PTR in_arg; -{ - struct elf32_hppa_stub_hash_entry *stub_entry; - struct bfd_link_info *info; - struct elf32_hppa_link_hash_table *hplink; - asection *stub_sec; - bfd *stub_bfd; - bfd_byte *loc; - bfd_vma sym_value; - bfd_vma insn; - bfd_vma off; - int val; - int size; - - /* Massage our args to the form they really have. */ - stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry; - info = (struct bfd_link_info *) in_arg; - - hplink = hppa_link_hash_table (info); - stub_sec = stub_entry->stub_sec; - - /* Make a note of the offset within the stubs for this entry. */ - stub_entry->stub_offset = stub_sec->_raw_size; - loc = stub_sec->contents + stub_entry->stub_offset; - - stub_bfd = stub_sec->owner; - - switch (stub_entry->stub_type) - { - case hppa_stub_long_branch: - /* Create the long branch. A long branch is formed with "ldil" - loading the upper bits of the target address into a register, - then branching with "be" which adds in the lower bits. - The "be" has its delay slot nullified. */ - sym_value = (stub_entry->target_value - + stub_entry->target_section->output_offset - + stub_entry->target_section->output_section->vma); - - val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_lrsel); - insn = hppa_rebuild_insn ((int) LDIL_R1, val, 21); - bfd_put_32 (stub_bfd, insn, loc); - - val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_rrsel) >> 2; - insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17); - bfd_put_32 (stub_bfd, insn, loc + 4); - -#if ! LONG_BRANCH_PIC_IN_SHLIB - if (info->shared) - { - /* Output a dynamic relocation for this stub. We only - output one PCREL21L reloc per stub, trusting that the - dynamic linker will also fix the implied PCREL17R for the - second instruction. PCREL21L dynamic relocs had better - never be emitted for some other purpose... */ - asection *srel; - Elf_Internal_Rela outrel; - - if (stub_entry->h == NULL) - { - (*_bfd_error_handler) - (_("%s(%s+0x%lx): cannot relocate %s, recompile with -ffunction-sections"), - bfd_get_filename (stub_entry->target_section->owner), - stub_sec->name, - (long) stub_entry->stub_offset, - stub_entry->root.string); - bfd_set_error (bfd_error_bad_value); - return false; - } - - srel = stub_entry->reloc_sec; - if (srel == NULL) - { - (*_bfd_error_handler) - (_("Could not find relocation section for %s"), - stub_sec->name); - bfd_set_error (bfd_error_bad_value); - return false; - } - - outrel.r_offset = (stub_entry->stub_offset - + stub_sec->output_offset - + stub_sec->output_section->vma); - outrel.r_info = ELF32_R_INFO (0, R_PARISC_PCREL21L); - outrel.r_addend = sym_value; - bfd_elf32_swap_reloca_out (stub_sec->output_section->owner, - &outrel, - ((Elf32_External_Rela *) - srel->contents + srel->reloc_count)); - ++srel->reloc_count; - } -#endif - size = 8; - break; - - case hppa_stub_long_branch_shared: - /* Branches are relative. This is where we are going to. */ - sym_value = (stub_entry->target_value - + stub_entry->target_section->output_offset - + stub_entry->target_section->output_section->vma); - - /* And this is where we are coming from, more or less. */ - sym_value -= (stub_entry->stub_offset - + stub_sec->output_offset - + stub_sec->output_section->vma); - - bfd_put_32 (stub_bfd, (bfd_vma) BL_R1, loc); - val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_lrsel); - insn = hppa_rebuild_insn ((int) ADDIL_R1, val, 21); - bfd_put_32 (stub_bfd, insn, loc + 4); - - val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_rrsel) >> 2; - insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17); - bfd_put_32 (stub_bfd, insn, loc + 8); - size = 12; - break; - - case hppa_stub_import: - case hppa_stub_import_shared: - off = stub_entry->h->elf.plt.offset; - if (off >= (bfd_vma) -2) - abort (); - - off &= ~ (bfd_vma) 1; - sym_value = (off - + hplink->splt->output_offset - + hplink->splt->output_section->vma - - elf_gp (hplink->splt->output_section->owner)); - - insn = ADDIL_DP; -#if R19_STUBS - if (stub_entry->stub_type == hppa_stub_import_shared) - insn = ADDIL_R19; -#endif - val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_lrsel), - insn = hppa_rebuild_insn ((int) insn, val, 21); - bfd_put_32 (stub_bfd, insn, loc); - - /* It is critical to use lrsel/rrsel here because we are using - two different offsets (+0 and +4) from sym_value. If we use - lsel/rsel then with unfortunate sym_values we will round - sym_value+4 up to the next 2k block leading to a mis-match - between the lsel and rsel value. */ - val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_rrsel); - insn = hppa_rebuild_insn ((int) LDW_R1_R21, val, 14); - bfd_put_32 (stub_bfd, insn, loc + 4); - - if (hplink->multi_subspace) - { - val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel); - insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14); - bfd_put_32 (stub_bfd, insn, loc + 8); - - bfd_put_32 (stub_bfd, (bfd_vma) LDSID_R21_R1, loc + 12); - bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16); - bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_R21, loc + 20); - bfd_put_32 (stub_bfd, (bfd_vma) STW_RP, loc + 24); - - size = 28; - } - else - { - bfd_put_32 (stub_bfd, (bfd_vma) BV_R0_R21, loc + 8); - val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel); - insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14); - bfd_put_32 (stub_bfd, insn, loc + 12); - - size = 16; - } - - if (!info->shared - && stub_entry->h != NULL - && stub_entry->h->pic_call) - { - /* Build the .plt entry needed to call a PIC function from - statically linked code. We don't need any relocs. */ - bfd *dynobj; - struct elf32_hppa_link_hash_entry *eh; - bfd_vma value; - - dynobj = hplink->root.dynobj; - eh = (struct elf32_hppa_link_hash_entry *) stub_entry->h; - - if (eh->elf.root.type != bfd_link_hash_defined - && eh->elf.root.type != bfd_link_hash_defweak) - abort (); - - value = (eh->elf.root.u.def.value - + eh->elf.root.u.def.section->output_offset - + eh->elf.root.u.def.section->output_section->vma); - - /* Fill in the entry in the procedure linkage table. - - The format of a plt entry is - <funcaddr> - <__gp>. */ - - bfd_put_32 (hplink->splt->owner, value, - hplink->splt->contents + off); - value = elf_gp (hplink->splt->output_section->owner); - bfd_put_32 (hplink->splt->owner, value, - hplink->splt->contents + off + 4); - } - break; - - case hppa_stub_export: - /* Branches are relative. This is where we are going to. */ - sym_value = (stub_entry->target_value - + stub_entry->target_section->output_offset - + stub_entry->target_section->output_section->vma); - - /* And this is where we are coming from. */ - sym_value -= (stub_entry->stub_offset - + stub_sec->output_offset - + stub_sec->output_section->vma); - - if (sym_value - 8 + 0x40000 >= 0x80000) - { - (*_bfd_error_handler) - (_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"), - bfd_get_filename (stub_entry->target_section->owner), - stub_sec->name, - (long) stub_entry->stub_offset, - stub_entry->root.string); - bfd_set_error (bfd_error_bad_value); - return false; - } - - val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_fsel) >> 2; - insn = hppa_rebuild_insn ((int) BL_RP, val, 17); - bfd_put_32 (stub_bfd, insn, loc); - - bfd_put_32 (stub_bfd, (bfd_vma) NOP, loc + 4); - bfd_put_32 (stub_bfd, (bfd_vma) LDW_RP, loc + 8); - bfd_put_32 (stub_bfd, (bfd_vma) LDSID_RP_R1, loc + 12); - bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16); - bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_RP, loc + 20); - - /* Point the function symbol at the stub. */ - stub_entry->h->elf.root.u.def.section = stub_sec; - stub_entry->h->elf.root.u.def.value = stub_sec->_raw_size; - - size = 24; - break; - - default: - BFD_FAIL (); - return false; - } - - stub_sec->_raw_size += size; - return true; -} - -#undef LDIL_R1 -#undef BE_SR4_R1 -#undef BL_R1 -#undef ADDIL_R1 -#undef DEPI_R1 -#undef ADDIL_DP -#undef LDW_R1_R21 -#undef LDW_R1_DLT -#undef LDW_R1_R19 -#undef ADDIL_R19 -#undef LDW_R1_DP -#undef LDSID_R21_R1 -#undef MTSP_R1 -#undef BE_SR0_R21 -#undef STW_RP -#undef BV_R0_R21 -#undef BL_RP -#undef NOP -#undef LDW_RP -#undef LDSID_RP_R1 -#undef BE_SR0_RP - -/* As above, but don't actually build the stub. Just bump offset so - we know stub section sizes. */ - -static boolean -hppa_size_one_stub (gen_entry, in_arg) - struct bfd_hash_entry *gen_entry; - PTR in_arg; -{ - struct elf32_hppa_stub_hash_entry *stub_entry; - struct elf32_hppa_link_hash_table *hplink; - int size; - - /* Massage our args to the form they really have. */ - stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry; - hplink = (struct elf32_hppa_link_hash_table *) in_arg; - - if (stub_entry->stub_type == hppa_stub_long_branch) - { -#if ! LONG_BRANCH_PIC_IN_SHLIB - if (stub_entry->reloc_sec != NULL) - stub_entry->reloc_sec->_raw_size += sizeof (Elf32_External_Rela); -#endif - size = 8; - } - else if (stub_entry->stub_type == hppa_stub_long_branch_shared) - size = 12; - else if (stub_entry->stub_type == hppa_stub_export) - size = 24; - else /* hppa_stub_import or hppa_stub_import_shared. */ - { - if (hplink->multi_subspace) - size = 28; - else - size = 16; - } - - stub_entry->stub_sec->_raw_size += size; - return true; -} - -/* Return nonzero if ABFD represents an HPPA ELF32 file. - Additionally we set the default architecture and machine. */ - -static boolean -elf32_hppa_object_p (abfd) - bfd *abfd; -{ - Elf_Internal_Ehdr * i_ehdrp; - unsigned int flags; - - i_ehdrp = elf_elfheader (abfd); - if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0) - { - if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_LINUX) - return false; - } - else - { - if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_HPUX) - return false; - } - - flags = i_ehdrp->e_flags; - switch (flags & (EF_PARISC_ARCH | EF_PARISC_WIDE)) - { - case EFA_PARISC_1_0: - return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 10); - case EFA_PARISC_1_1: - return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 11); - case EFA_PARISC_2_0: - return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 20); - case EFA_PARISC_2_0 | EF_PARISC_WIDE: - return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 25); - } - return true; -} - -/* Undo the generic ELF code's subtraction of section->vma from the - value of each external symbol. */ - -static boolean -elf32_hppa_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) - bfd *abfd ATTRIBUTE_UNUSED; - struct bfd_link_info *info ATTRIBUTE_UNUSED; - const Elf_Internal_Sym *sym ATTRIBUTE_UNUSED; - const char **namep ATTRIBUTE_UNUSED; - flagword *flagsp ATTRIBUTE_UNUSED; - asection **secp; - bfd_vma *valp; -{ - *valp += (*secp)->vma; - return true; -} - -/* Create the .plt and .got sections, and set up our hash table - short-cuts to various dynamic sections. */ - -static boolean -elf32_hppa_create_dynamic_sections (abfd, info) - bfd *abfd; - struct bfd_link_info *info; -{ - struct elf32_hppa_link_hash_table *hplink; - - /* Don't try to create the .plt and .got twice. */ - hplink = hppa_link_hash_table (info); - if (hplink->splt != NULL) - return true; - - /* Call the generic code to do most of the work. */ - if (! _bfd_elf_create_dynamic_sections (abfd, info)) - return false; - - hplink->splt = bfd_get_section_by_name (abfd, ".plt"); - hplink->srelplt = bfd_get_section_by_name (abfd, ".rela.plt"); - - hplink->sgot = bfd_get_section_by_name (abfd, ".got"); - hplink->srelgot = bfd_make_section (abfd, ".rela.got"); - if (hplink->srelgot == NULL - || ! bfd_set_section_flags (abfd, hplink->srelgot, - (SEC_ALLOC - | SEC_LOAD - | SEC_HAS_CONTENTS - | SEC_IN_MEMORY - | SEC_LINKER_CREATED - | SEC_READONLY)) - || ! bfd_set_section_alignment (abfd, hplink->srelgot, 2)) - return false; - - hplink->sdynbss = bfd_get_section_by_name (abfd, ".dynbss"); - hplink->srelbss = bfd_get_section_by_name (abfd, ".rela.bss"); - - return true; -} - -/* Look through the relocs for a section during the first phase, and - allocate space in the global offset table or procedure linkage - table. At this point we haven't necessarily read all the input - files. */ - -static boolean -elf32_hppa_check_relocs (abfd, info, sec, relocs) - bfd *abfd; - struct bfd_link_info *info; - asection *sec; - const Elf_Internal_Rela *relocs; -{ - bfd *dynobj; - Elf_Internal_Shdr *symtab_hdr; - struct elf_link_hash_entry **sym_hashes; - bfd_signed_vma *local_got_refcounts; - const Elf_Internal_Rela *rel; - const Elf_Internal_Rela *rel_end; - struct elf32_hppa_link_hash_table *hplink; - asection *sreloc; - asection *stubreloc; - - if (info->relocateable) - return true; - - hplink = hppa_link_hash_table (info); - dynobj = hplink->root.dynobj; - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (abfd); - local_got_refcounts = elf_local_got_refcounts (abfd); - sreloc = NULL; - stubreloc = NULL; - - rel_end = relocs + sec->reloc_count; - for (rel = relocs; rel < rel_end; rel++) - { - enum { - NEED_GOT = 1, - NEED_PLT = 2, - NEED_DYNREL = 4, -#if LONG_BRANCH_PIC_IN_SHLIB - NEED_STUBREL = 0, /* We won't be needing them in this case. */ -#else - NEED_STUBREL = 8, -#endif - PLT_PLABEL = 16 - }; - - unsigned int r_symndx, r_type; - struct elf32_hppa_link_hash_entry *h; - int need_entry; - - r_symndx = ELF32_R_SYM (rel->r_info); - - if (r_symndx < symtab_hdr->sh_info) - h = NULL; - else - h = ((struct elf32_hppa_link_hash_entry *) - sym_hashes[r_symndx - symtab_hdr->sh_info]); - - r_type = ELF32_R_TYPE (rel->r_info); - - switch (r_type) - { - case R_PARISC_DLTIND14F: - case R_PARISC_DLTIND14R: - case R_PARISC_DLTIND21L: - /* This symbol requires a global offset table entry. */ - need_entry = NEED_GOT; - - /* Mark this section as containing PIC code. */ - sec->flags |= SEC_HAS_GOT_REF; - break; - - case R_PARISC_PLABEL14R: /* "Official" procedure labels. */ - case R_PARISC_PLABEL21L: - case R_PARISC_PLABEL32: - /* If the addend is non-zero, we break badly. */ - if (rel->r_addend != 0) - abort (); - - /* If we are creating a shared library, then we need to - create a PLT entry for all PLABELs, because PLABELs with - local symbols may be passed via a pointer to another - object. Additionally, output a dynamic relocation - pointing to the PLT entry. - For executables, the original 32-bit ABI allowed two - different styles of PLABELs (function pointers): For - global functions, the PLABEL word points into the .plt - two bytes past a (function address, gp) pair, and for - local functions the PLABEL points directly at the - function. The magic +2 for the first type allows us to - differentiate between the two. As you can imagine, this - is a real pain when it comes to generating code to call - functions indirectly or to compare function pointers. - We avoid the mess by always pointing a PLABEL into the - .plt, even for local functions. */ - need_entry = PLT_PLABEL | NEED_PLT | NEED_DYNREL; - break; - - case R_PARISC_PCREL12F: - hplink->has_12bit_branch = 1; - /* Fall thru. */ - case R_PARISC_PCREL17C: - case R_PARISC_PCREL17F: - hplink->has_17bit_branch = 1; - /* Fall thru. */ - case R_PARISC_PCREL22F: - /* Function calls might need to go through the .plt, and - might require long branch stubs. */ - if (h == NULL) - { - /* We know local syms won't need a .plt entry, and if - they need a long branch stub we can't guarantee that - we can reach the stub. So just flag an error later - if we're doing a shared link and find we need a long - branch stub. */ - continue; - } - else - { - /* Global symbols will need a .plt entry if they remain - global, and in most cases won't need a long branch - stub. Unfortunately, we have to cater for the case - where a symbol is forced local by versioning, or due - to symbolic linking, and we lose the .plt entry. */ - need_entry = NEED_PLT | NEED_STUBREL; - if (h->elf.type == STT_PARISC_MILLI) - need_entry = NEED_STUBREL; - } - break; - - case R_PARISC_SEGBASE: /* Used to set segment base. */ - case R_PARISC_SEGREL32: /* Relative reloc, used for unwind. */ - case R_PARISC_PCREL14F: /* PC relative load/store. */ - case R_PARISC_PCREL14R: - case R_PARISC_PCREL17R: /* External branches. */ - case R_PARISC_PCREL21L: /* As above, and for load/store too. */ - /* We don't need to propagate the relocation if linking a - shared object since these are section relative. */ - continue; - - case R_PARISC_DPREL14F: /* Used for gp rel data load/store. */ - case R_PARISC_DPREL14R: - case R_PARISC_DPREL21L: - if (info->shared) - { - (*_bfd_error_handler) - (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"), - bfd_get_filename (abfd), - elf_hppa_howto_table[r_type].name); - bfd_set_error (bfd_error_bad_value); - return false; - } - /* Fall through. */ - - case R_PARISC_DIR17F: /* Used for external branches. */ - case R_PARISC_DIR17R: - case R_PARISC_DIR14F: /* Used for load/store from absolute locn. */ - case R_PARISC_DIR14R: - case R_PARISC_DIR21L: /* As above, and for ext branches too. */ -#if 1 - /* Help debug shared library creation. Any of the above - relocs can be used in shared libs, but they may cause - pages to become unshared. */ - if (info->shared) - { - (*_bfd_error_handler) - (_("%s: relocation %s should not be used when making a shared object; recompile with -fPIC"), - bfd_get_filename (abfd), - elf_hppa_howto_table[r_type].name); - } - /* Fall through. */ -#endif - - case R_PARISC_DIR32: /* .word relocs. */ - /* We may want to output a dynamic relocation later. */ - need_entry = NEED_DYNREL; - break; - - /* This relocation describes the C++ object vtable hierarchy. - Reconstruct it for later use during GC. */ - case R_PARISC_GNU_VTINHERIT: - if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, - &h->elf, rel->r_offset)) - return false; - continue; - - /* This relocation describes which C++ vtable entries are actually - used. Record for later use during GC. */ - case R_PARISC_GNU_VTENTRY: - if (!_bfd_elf32_gc_record_vtentry (abfd, sec, - &h->elf, rel->r_addend)) - return false; - continue; - - default: - continue; - } - - /* Now carry out our orders. */ - if (need_entry & NEED_GOT) - { - /* Allocate space for a GOT entry, as well as a dynamic - relocation for this entry. */ - if (dynobj == NULL) - hplink->root.dynobj = dynobj = abfd; - - if (hplink->sgot == NULL) - { - if (! elf32_hppa_create_dynamic_sections (dynobj, info)) - return false; - } - - if (h != NULL) - { - if (h->elf.got.refcount == -1) - h->elf.got.refcount = 1; - else - h->elf.got.refcount += 1; - } - else - { - /* This is a global offset table entry for a local symbol. */ - if (local_got_refcounts == NULL) - { - size_t size; - - /* Allocate space for local got offsets and local - plt offsets. Done this way to save polluting - elf_obj_tdata with another target specific - pointer. */ - size = symtab_hdr->sh_info * 2 * sizeof (bfd_signed_vma); - local_got_refcounts = ((bfd_signed_vma *) - bfd_alloc (abfd, size)); - if (local_got_refcounts == NULL) - return false; - elf_local_got_refcounts (abfd) = local_got_refcounts; - memset (local_got_refcounts, -1, size); - } - if (local_got_refcounts[r_symndx] == -1) - local_got_refcounts[r_symndx] = 1; - else - local_got_refcounts[r_symndx] += 1; - } - } - - if (need_entry & NEED_PLT) - { - /* If we are creating a shared library, and this is a reloc - against a weak symbol or a global symbol in a dynamic - object, then we will be creating an import stub and a - .plt entry for the symbol. Similarly, on a normal link - to symbols defined in a dynamic object we'll need the - import stub and a .plt entry. We don't know yet whether - the symbol is defined or not, so make an entry anyway and - clean up later in adjust_dynamic_symbol. */ - if ((sec->flags & SEC_ALLOC) != 0) - { - if (h != NULL) - { - if (h->elf.plt.refcount == -1) - { - h->elf.plt.refcount = 1; - h->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; - } - else - h->elf.plt.refcount += 1; - - /* If this .plt entry is for a plabel, mark it so - that adjust_dynamic_symbol will keep the entry - even if it appears to be local. */ - if (need_entry & PLT_PLABEL) - h->plabel = 1; - } - else if (need_entry & PLT_PLABEL) - { - bfd_signed_vma *local_plt_refcounts; - - if (local_got_refcounts == NULL) - { - size_t size; - - /* Allocate space for local got offsets and local - plt offsets. */ - size = symtab_hdr->sh_info * 2 * sizeof (bfd_signed_vma); - local_got_refcounts = ((bfd_signed_vma *) - bfd_alloc (abfd, size)); - if (local_got_refcounts == NULL) - return false; - elf_local_got_refcounts (abfd) = local_got_refcounts; - memset (local_got_refcounts, -1, size); - } - local_plt_refcounts = (local_got_refcounts - + symtab_hdr->sh_info); - if (local_plt_refcounts[r_symndx] == -1) - local_plt_refcounts[r_symndx] = 1; - else - local_plt_refcounts[r_symndx] += 1; - } - } - } - - if (need_entry & (NEED_DYNREL | NEED_STUBREL)) - { - /* Flag this symbol as having a non-got, non-plt reference - so that we generate copy relocs if it turns out to be - dynamic. */ - if (need_entry == NEED_DYNREL - && h != NULL - && !info->shared - && (sec->flags & SEC_READONLY) != 0) - h->elf.elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; - - /* If we are creating a shared library then we need to copy - the reloc into the shared library. However, if we are - linking with -Bsymbolic, we need only copy absolute - relocs or relocs against symbols that are not defined in - an object we are including in the link. PC- or DP- or - DLT-relative relocs against any local sym or global sym - with DEF_REGULAR set, can be discarded. At this point we - have not seen all the input files, so it is possible that - DEF_REGULAR is not set now but will be set later (it is - never cleared). We account for that possibility below by - storing information in the reloc_entries field of the - hash table entry. - - A similar situation to the -Bsymbolic case occurs when - creating shared libraries and symbol visibility changes - render the symbol local. - - As it turns out, all the relocs we will be creating here - are absolute, so we cannot remove them on -Bsymbolic - links or visibility changes anyway. A STUB_REL reloc - is absolute too, as in that case it is the reloc in the - stub we will be creating, rather than copying the PCREL - reloc in the branch. */ - if ((info->shared - && (sec->flags & SEC_ALLOC) != 0 - && (IS_ABSOLUTE_RELOC (r_type) - || (h != NULL - && (!info->symbolic - || h->elf.root.type == bfd_link_hash_defweak - || (h->elf.elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0)))) - || (!info->shared - && (sec->flags & SEC_ALLOC) != 0 - && h != NULL - && (h->elf.elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 - && (h->elf.root.type == bfd_link_hash_defweak - || (h->elf.elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0))) - { - boolean doit; - asection *srel; - - srel = sreloc; - if ((need_entry & NEED_STUBREL)) - srel = stubreloc; - - /* Create a reloc section in dynobj and make room for - this reloc. */ - if (srel == NULL) - { - char *name; - - if (dynobj == NULL) - hplink->root.dynobj = dynobj = abfd; - - name = bfd_elf_string_from_elf_section - (abfd, - elf_elfheader (abfd)->e_shstrndx, - elf_section_data (sec)->rel_hdr.sh_name); - if (name == NULL) - { - (*_bfd_error_handler) - (_("Could not find relocation section for %s"), - sec->name); - bfd_set_error (bfd_error_bad_value); - return false; - } - - if ((need_entry & NEED_STUBREL)) - { - size_t len = strlen (name) + sizeof (STUB_SUFFIX); - char *newname = bfd_malloc (len); - - if (newname == NULL) - return false; - strcpy (newname, name); - strcpy (newname + len - sizeof (STUB_SUFFIX), - STUB_SUFFIX); - name = newname; - } - - srel = bfd_get_section_by_name (dynobj, name); - if (srel == NULL) - { - flagword flags; - - srel = bfd_make_section (dynobj, name); - flags = (SEC_HAS_CONTENTS | SEC_READONLY - | SEC_IN_MEMORY | SEC_LINKER_CREATED); - if ((sec->flags & SEC_ALLOC) != 0) - flags |= SEC_ALLOC | SEC_LOAD; - if (srel == NULL - || !bfd_set_section_flags (dynobj, srel, flags) - || !bfd_set_section_alignment (dynobj, srel, 2)) - return false; - } - else if ((need_entry & NEED_STUBREL)) - free (name); - - if ((need_entry & NEED_STUBREL)) - stubreloc = srel; - else - sreloc = srel; - } - -#if ! LONG_BRANCH_PIC_IN_SHLIB - /* If this is a function call, we only need one dynamic - reloc for the stub as all calls to a particular - function will go through the same stub. Actually, a - long branch stub needs two relocations, but we count - on some intelligence on the part of the dynamic - linker. */ - if ((need_entry & NEED_STUBREL)) - { - doit = h->stub_reloc_sec != stubreloc; - h->stub_reloc_sec = stubreloc; - } - else -#endif - doit = 1; - - if (doit) - { - srel->_raw_size += sizeof (Elf32_External_Rela); - - /* Keep track of relocations we have entered for - this global symbol, so that we can discard them - later if necessary. */ - if (!info->shared - || (h != NULL - && (! IS_ABSOLUTE_RELOC (rtype) - || (need_entry & NEED_STUBREL)))) - { - struct elf32_hppa_dyn_reloc_entry *p; - - for (p = h->reloc_entries; p != NULL; p = p->next) - if (p->section == srel) - break; - - if (p == NULL) - { - p = ((struct elf32_hppa_dyn_reloc_entry *) - bfd_alloc (dynobj, sizeof *p)); - if (p == NULL) - return false; - p->next = h->reloc_entries; - h->reloc_entries = p; - p->section = srel; - p->count = 0; - } - - /* NEED_STUBREL and NEED_DYNREL are never both - set. Leave the count at zero for the - NEED_STUBREL case as we only ever have one - stub reloc per section per symbol, and this - simplifies code to discard unneeded relocs. */ - if (! (need_entry & NEED_STUBREL)) - ++p->count; - } - } - } - } - } - - return true; -} - -/* Return the section that should be marked against garbage collection - for a given relocation. */ - -static asection * -elf32_hppa_gc_mark_hook (abfd, info, rel, h, sym) - bfd *abfd; - struct bfd_link_info *info ATTRIBUTE_UNUSED; - Elf_Internal_Rela *rel; - struct elf_link_hash_entry *h; - Elf_Internal_Sym *sym; -{ - if (h != NULL) - { - switch ((unsigned int) ELF32_R_TYPE (rel->r_info)) - { - case R_PARISC_GNU_VTINHERIT: - case R_PARISC_GNU_VTENTRY: - break; - - default: - switch (h->root.type) - { - case bfd_link_hash_defined: - case bfd_link_hash_defweak: - return h->root.u.def.section; - - case bfd_link_hash_common: - return h->root.u.c.p->section; - - default: - break; - } - } - } - else - { - if (!(elf_bad_symtab (abfd) - && ELF_ST_BIND (sym->st_info) != STB_LOCAL) - && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) - && sym->st_shndx != SHN_COMMON)) - { - return bfd_section_from_elf_index (abfd, sym->st_shndx); - } - } - - return NULL; -} - -/* Update the got and plt entry reference counts for the section being - removed. */ - -static boolean -elf32_hppa_gc_sweep_hook (abfd, info, sec, relocs) - bfd *abfd; - struct bfd_link_info *info ATTRIBUTE_UNUSED; - asection *sec; - const Elf_Internal_Rela *relocs; -{ - Elf_Internal_Shdr *symtab_hdr; - struct elf_link_hash_entry **sym_hashes; - bfd_signed_vma *local_got_refcounts; - bfd_signed_vma *local_plt_refcounts; - const Elf_Internal_Rela *rel, *relend; - unsigned long r_symndx; - struct elf_link_hash_entry *h; - struct elf32_hppa_link_hash_table *hplink; - bfd *dynobj; - - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (abfd); - local_got_refcounts = elf_local_got_refcounts (abfd); - local_plt_refcounts = local_got_refcounts; - if (local_plt_refcounts != NULL) - local_plt_refcounts += symtab_hdr->sh_info; - hplink = hppa_link_hash_table (info); - dynobj = hplink->root.dynobj; - if (dynobj == NULL) - return true; - - relend = relocs + sec->reloc_count; - for (rel = relocs; rel < relend; rel++) - switch ((unsigned int) ELF32_R_TYPE (rel->r_info)) - { - case R_PARISC_DLTIND14F: - case R_PARISC_DLTIND14R: - case R_PARISC_DLTIND21L: - r_symndx = ELF32_R_SYM (rel->r_info); - if (r_symndx >= symtab_hdr->sh_info) - { - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - if (h->got.refcount > 0) - h->got.refcount -= 1; - } - else if (local_got_refcounts != NULL) - { - if (local_got_refcounts[r_symndx] > 0) - local_got_refcounts[r_symndx] -= 1; - } - break; - - case R_PARISC_PCREL12F: - case R_PARISC_PCREL17C: - case R_PARISC_PCREL17F: - case R_PARISC_PCREL22F: - r_symndx = ELF32_R_SYM (rel->r_info); - if (r_symndx >= symtab_hdr->sh_info) - { - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - if (h->plt.refcount > 0) - h->plt.refcount -= 1; - } - break; - - case R_PARISC_PLABEL14R: - case R_PARISC_PLABEL21L: - case R_PARISC_PLABEL32: - r_symndx = ELF32_R_SYM (rel->r_info); - if (r_symndx >= symtab_hdr->sh_info) - { - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - if (h->plt.refcount > 0) - h->plt.refcount -= 1; - } - else if (local_plt_refcounts != NULL) - { - if (local_plt_refcounts[r_symndx] > 0) - local_plt_refcounts[r_symndx] -= 1; - } - break; - - default: - break; - } - - return true; -} - -/* Our own version of hide_symbol, so that we can keep plt entries for - plabels. */ - -static void -elf32_hppa_hide_symbol (info, h) - struct bfd_link_info *info ATTRIBUTE_UNUSED; - struct elf_link_hash_entry *h; -{ - if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) - h->dynindx = -1; - if (! ((struct elf32_hppa_link_hash_entry *) h)->plabel) - { - h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; - h->plt.offset = (bfd_vma) -1; - } -} - -/* This is the condition under which elf32_hppa_finish_dynamic_symbol - will be called from elflink.h. If elflink.h doesn't call our - finish_dynamic_symbol routine, we'll need to do something about - initializing any .plt and .got entries in elf32_hppa_relocate_section. */ -#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ - ((DYN) \ - && ((INFO)->shared \ - || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ - && ((H)->dynindx != -1 \ - || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) - -/* Adjust a symbol defined by a dynamic object and referenced by a - regular object. The current definition is in some section of the - dynamic object, but we're not including those sections. We have to - change the definition to something the rest of the link can - understand. */ - -static boolean -elf32_hppa_adjust_dynamic_symbol (info, h) - struct bfd_link_info *info; - struct elf_link_hash_entry *h; -{ - bfd *dynobj; - struct elf32_hppa_link_hash_table *hplink; - asection *s; - - hplink = hppa_link_hash_table (info); - dynobj = hplink->root.dynobj; - - /* If this is a function, put it in the procedure linkage table. We - will fill in the contents of the procedure linkage table later, - when we know the address of the .got section. */ - if (h->type == STT_FUNC - || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) - { - if (!info->shared - && h->plt.refcount > 0 - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 - && (h->root.u.def.section->flags & SEC_HAS_GOT_REF) != 0) - { - ((struct elf32_hppa_link_hash_entry *) h)->maybe_pic_call = 1; - } - - if (h->plt.refcount <= 0 - || ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 - && h->root.type != bfd_link_hash_defweak - && ! ((struct elf32_hppa_link_hash_entry *) h)->plabel - && (!info->shared || info->symbolic))) - { - /* The .plt entry is not needed when: - a) Garbage collection has removed all references to the - symbol, or - b) We know for certain the symbol is defined in this - object, and it's not a weak definition, nor is the symbol - used by a plabel relocation. Either this object is the - application or we are doing a shared symbolic link. */ - - /* As a special sop to the hppa ABI, we keep a .plt entry - for functions in sections containing PIC code. */ - if (((struct elf32_hppa_link_hash_entry *) h)->maybe_pic_call) - ((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1; - else - { - h->plt.offset = (bfd_vma) -1; - h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; - } - } - - return true; - } - - /* If this is a weak symbol, and there is a real definition, the - processor independent code will have arranged for us to see the - real definition first, and we can just use the same value. */ - if (h->weakdef != NULL) - { - if (h->weakdef->root.type != bfd_link_hash_defined - && h->weakdef->root.type != bfd_link_hash_defweak) - abort (); - h->root.u.def.section = h->weakdef->root.u.def.section; - h->root.u.def.value = h->weakdef->root.u.def.value; - return true; - } - - /* This is a reference to a symbol defined by a dynamic object which - is not a function. */ - - /* If we are creating a shared library, we must presume that the - only references to the symbol are via the global offset table. - For such cases we need not do anything here; the relocations will - be handled correctly by relocate_section. */ - if (info->shared) - return true; - - /* If there are no references to this symbol that do not use the - GOT, we don't need to generate a copy reloc. */ - if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) - return true; - - /* We must allocate the symbol in our .dynbss section, which will - become part of the .bss section of the executable. There will be - an entry for this symbol in the .dynsym section. The dynamic - object will contain position independent code, so all references - from the dynamic object to this symbol will go through the global - offset table. The dynamic linker will use the .dynsym entry to - determine the address it must put in the global offset table, so - both the dynamic object and the regular object will refer to the - same memory location for the variable. */ - - s = hplink->sdynbss; - - /* We must generate a COPY reloc to tell the dynamic linker to - copy the initial value out of the dynamic object and into the - runtime process image. We need to remember the offset into the - .rela.bss section we are going to use. */ - if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) - { - asection *srel; - - srel = hplink->srelbss; - srel->_raw_size += sizeof (Elf32_External_Rela); - h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; - } - - { - /* We need to figure out the alignment required for this symbol. I - have no idea how other ELF linkers handle this. */ - unsigned int power_of_two; - - power_of_two = bfd_log2 (h->size); - if (power_of_two > 3) - power_of_two = 3; - - /* Apply the required alignment. */ - s->_raw_size = BFD_ALIGN (s->_raw_size, - (bfd_size_type) (1 << power_of_two)); - if (power_of_two > bfd_get_section_alignment (dynobj, s)) - { - if (! bfd_set_section_alignment (dynobj, s, power_of_two)) - return false; - } - } - /* Define the symbol as being at this point in the section. */ - h->root.u.def.section = s; - h->root.u.def.value = s->_raw_size; - - /* Increment the section size to make room for the symbol. */ - s->_raw_size += h->size; - - return true; -} - -/* Called via elf_link_hash_traverse to create .plt entries for an - application that uses statically linked PIC functions. Similar to - the first part of elf32_hppa_adjust_dynamic_symbol. */ - -static boolean -hppa_handle_PIC_calls (h, inf) - struct elf_link_hash_entry *h; - PTR inf ATTRIBUTE_UNUSED; -{ - if (! (h->plt.refcount > 0 - && (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak) - && (h->root.u.def.section->flags & SEC_HAS_GOT_REF) != 0)) - { - h->plt.offset = (bfd_vma) -1; - h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; - return true; - } - - h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; - ((struct elf32_hppa_link_hash_entry *) h)->maybe_pic_call = 1; - ((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1; - - return true; -} - -/* Allocate space in .plt, .got and associated reloc sections for - global syms. */ - -static boolean -allocate_plt_and_got_and_discard_relocs (h, inf) - struct elf_link_hash_entry *h; - PTR inf; -{ - struct bfd_link_info *info; - struct elf32_hppa_link_hash_table *hplink; - asection *s; - struct elf32_hppa_link_hash_entry *eh; - - if (h->root.type == bfd_link_hash_indirect - || h->root.type == bfd_link_hash_warning) - return true; - - info = (struct bfd_link_info *) inf; - hplink = hppa_link_hash_table (info); - if ((hplink->root.dynamic_sections_created - && h->plt.refcount > 0) - || ((struct elf32_hppa_link_hash_entry *) h)->pic_call) - { - /* Make sure this symbol is output as a dynamic symbol. - Undefined weak syms won't yet be marked as dynamic. */ - if (h->dynindx == -1 - && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0 - && h->type != STT_PARISC_MILLI - && !((struct elf32_hppa_link_hash_entry *) h)->pic_call) - { - if (! bfd_elf32_link_record_dynamic_symbol (info, h)) - return false; - } - - /* Make an entry in the .plt section. */ - s = hplink->splt; - h->plt.offset = s->_raw_size; - if (PLABEL_PLT_ENTRY_SIZE != PLT_ENTRY_SIZE - && ((struct elf32_hppa_link_hash_entry *) h)->plabel - && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) - { - /* Add some extra space for the dynamic linker to use. */ - s->_raw_size += PLABEL_PLT_ENTRY_SIZE; - } - else - s->_raw_size += PLT_ENTRY_SIZE; - - if (! ((struct elf32_hppa_link_hash_entry *) h)->pic_call - && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) - { - /* We also need to make an entry in the .rela.plt section. */ - hplink->srelplt->_raw_size += sizeof (Elf32_External_Rela); - hplink->need_plt_stub = 1; - } - } - else - { - h->plt.offset = (bfd_vma) -1; - h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; - } - - if (h->got.refcount > 0) - { - boolean dyn; - - /* Make sure this symbol is output as a dynamic symbol. - Undefined weak syms won't yet be marked as dynamic. */ - if (h->dynindx == -1 - && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0 - && h->type != STT_PARISC_MILLI) - { - if (! bfd_elf32_link_record_dynamic_symbol (info, h)) - return false; - } - - s = hplink->sgot; - h->got.offset = s->_raw_size; - s->_raw_size += GOT_ENTRY_SIZE; - dyn = hplink->root.dynamic_sections_created; - if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) - hplink->srelgot->_raw_size += sizeof (Elf32_External_Rela); - } - else - h->got.offset = (bfd_vma) -1; - - /* If this is a -Bsymbolic shared link, then we need to discard all - space allocated for dynamic relocs against symbols defined in a - regular object. For the normal shared case, discard space for - relocs that have become local due to symbol visibility changes. - For the non-shared case, discard space for symbols which turn out - to need copy relocs or are not dynamic. We also need to lose - relocs we've allocated for long branch stubs if we know we won't - be generating a stub. */ - - eh = (struct elf32_hppa_link_hash_entry *) h; - if (eh->reloc_entries == NULL) - return true; - - /* First handle the non-shared case. */ - if (!info->shared - && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 - && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 - || h->root.type == bfd_link_hash_undefweak - || h->root.type == bfd_link_hash_undefined)) - { - /* Make sure this symbol is output as a dynamic symbol. - Undefined weak syms won't yet be marked as dynamic. */ - if (h->dynindx == -1 - && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0 - && h->type != STT_PARISC_MILLI) - { - if (! bfd_elf32_link_record_dynamic_symbol (info, h)) - return false; - } - - /* If that succeeded, we know we'll be keeping all the relocs. */ - if (h->dynindx != -1) - return true; - } - -#if ! LONG_BRANCH_PIC_IN_SHLIB && LONG_BRANCH_VIA_PLT - /* Handle the stub reloc case. If we have a plt entry for the - function, we won't be needing long branch stubs. c->count will - only be zero for stub relocs, which provides a handy way of - flagging these relocs, and means we need do nothing special for - the forced local and symbolic link case. */ - if (eh->stub_reloc_sec != NULL - && eh->elf.plt.offset != (bfd_vma) -1) - { - struct elf32_hppa_dyn_reloc_entry *c; - - for (c = eh->reloc_entries; c != NULL; c = c->next) - if (c->count == 0) - c->section->_raw_size -= sizeof (Elf32_External_Rela); - } -#endif - - /* Discard any relocs in the non-shared case. For the shared case, - if a symbol has been forced local or we have found a regular - definition for the symbolic link case, then we won't be needing - any relocs. */ - if (!info->shared - || ((eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 - && ((eh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 - || info->symbolic))) - { - struct elf32_hppa_dyn_reloc_entry *c; - - for (c = eh->reloc_entries; c != NULL; c = c->next) - c->section->_raw_size -= c->count * sizeof (Elf32_External_Rela); - } - - return true; -} - -/* This function is called via elf_link_hash_traverse to force - millicode symbols local so they do not end up as globals in the - dynamic symbol table. We ought to be able to do this in - adjust_dynamic_symbol, but our adjust_dynamic_symbol is not called - for all dynamic symbols. Arguably, this is a bug in - elf_adjust_dynamic_symbol. */ - -static boolean -clobber_millicode_symbols (h, info) - struct elf_link_hash_entry *h; - struct bfd_link_info *info; -{ - /* We only want to remove these from the dynamic symbol table. - Therefore we do not leave ELF_LINK_FORCED_LOCAL set. */ - if (h->type == STT_PARISC_MILLI) - { - unsigned short oldflags = h->elf_link_hash_flags; - h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL; - elf32_hppa_hide_symbol (info, h); - h->elf_link_hash_flags &= ~ELF_LINK_FORCED_LOCAL; - h->elf_link_hash_flags |= oldflags & ELF_LINK_FORCED_LOCAL; - } - return true; -} - -/* Set the sizes of the dynamic sections. */ - -static boolean -elf32_hppa_size_dynamic_sections (output_bfd, info) - bfd *output_bfd; - struct bfd_link_info *info; -{ - struct elf32_hppa_link_hash_table *hplink; - bfd *dynobj; - bfd *i; - asection *s; - boolean relocs; - boolean reltext; - - hplink = hppa_link_hash_table (info); - dynobj = hplink->root.dynobj; - if (dynobj == NULL) - abort (); - - if (hplink->root.dynamic_sections_created) - { - /* Set the contents of the .interp section to the interpreter. */ - if (! info->shared) - { - s = bfd_get_section_by_name (dynobj, ".interp"); - if (s == NULL) - abort (); - s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; - s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; - } - - /* Force millicode symbols local. */ - elf_link_hash_traverse (&hplink->root, - clobber_millicode_symbols, - info); - } - else - { - /* Run through the function symbols, looking for any that are - PIC, and allocate space for the necessary .plt entries so - that %r19 will be set up. */ - if (! info->shared) - elf_link_hash_traverse (&hplink->root, - hppa_handle_PIC_calls, - info); - } - - /* Set up .got and .plt offsets for local syms. */ - for (i = info->input_bfds; i; i = i->link_next) - { - bfd_signed_vma *local_got; - bfd_signed_vma *end_local_got; - bfd_signed_vma *local_plt; - bfd_signed_vma *end_local_plt; - bfd_size_type locsymcount; - Elf_Internal_Shdr *symtab_hdr; - asection *srel; - - if (bfd_get_flavour (i) != bfd_target_elf_flavour) - continue; - - local_got = elf_local_got_refcounts (i); - if (!local_got) - continue; - - symtab_hdr = &elf_tdata (i)->symtab_hdr; - locsymcount = symtab_hdr->sh_info; - end_local_got = local_got + locsymcount; - s = hplink->sgot; - srel = hplink->srelgot; - for (; local_got < end_local_got; ++local_got) - { - if (*local_got > 0) - { - *local_got = s->_raw_size; - s->_raw_size += GOT_ENTRY_SIZE; - if (info->shared) - srel->_raw_size += sizeof (Elf32_External_Rela); - } - else - *local_got = (bfd_vma) -1; - } - - local_plt = end_local_got; - end_local_plt = local_plt + locsymcount; - if (! hplink->root.dynamic_sections_created) - { - /* Won't be used, but be safe. */ - for (; local_plt < end_local_plt; ++local_plt) - *local_plt = (bfd_vma) -1; - } - else - { - s = hplink->splt; - srel = hplink->srelplt; - for (; local_plt < end_local_plt; ++local_plt) - { - if (*local_plt > 0) - { - *local_plt = s->_raw_size; - s->_raw_size += PLT_ENTRY_SIZE; - if (info->shared) - srel->_raw_size += sizeof (Elf32_External_Rela); - } - else - *local_plt = (bfd_vma) -1; - } - } - } - - /* Allocate global sym .plt and .got entries. Also discard all - unneeded relocs. */ - elf_link_hash_traverse (&hplink->root, - allocate_plt_and_got_and_discard_relocs, - (PTR) info); - - /* The check_relocs and adjust_dynamic_symbol entry points have - determined the sizes of the various dynamic sections. Allocate - memory for them. */ - relocs = false; - reltext = false; - for (s = dynobj->sections; s != NULL; s = s->next) - { - if ((s->flags & SEC_LINKER_CREATED) == 0) - continue; - - if (s == hplink->splt) - { - if (hplink->need_plt_stub) - { - /* Make space for the plt stub at the end of the .plt - section. We want this stub right at the end, up - against the .got section. */ - int gotalign = bfd_section_alignment (dynobj, hplink->sgot); - int pltalign = bfd_section_alignment (dynobj, s); - bfd_size_type mask; - - if (gotalign > pltalign) - bfd_set_section_alignment (dynobj, s, gotalign); - mask = ((bfd_size_type) 1 << gotalign) - 1; - s->_raw_size = (s->_raw_size + sizeof (plt_stub) + mask) & ~mask; - } - } - else if (s == hplink->sgot) - ; - else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) - { - if (s->_raw_size != 0) - { - asection *target; - const char *outname; - - /* Remember whether there are any reloc sections other - than .rela.plt. */ - if (s != hplink->srelplt) - relocs = true; - - /* If this relocation section applies to a read only - section, then we probably need a DT_TEXTREL entry. */ - outname = bfd_get_section_name (output_bfd, - s->output_section); - target = bfd_get_section_by_name (output_bfd, outname + 5); - if (target != NULL - && (target->flags & SEC_READONLY) != 0 - && (target->flags & SEC_ALLOC) != 0) - reltext = true; - - /* We use the reloc_count field as a counter if we need - to copy relocs into the output file. */ - s->reloc_count = 0; - } - } - else - { - /* It's not one of our sections, so don't allocate space. */ - continue; - } - - if (s->_raw_size == 0) - { - /* If we don't need this section, strip it from the - output file. This is mostly to handle .rela.bss and - .rela.plt. We must create both sections in - create_dynamic_sections, because they must be created - before the linker maps input sections to output - sections. The linker does that before - adjust_dynamic_symbol is called, and it is that - function which decides whether anything needs to go - into these sections. */ - _bfd_strip_section_from_output (info, s); - continue; - } - - /* Allocate memory for the section contents. Zero it, because - we may not fill in all the reloc sections. */ - s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); - if (s->contents == NULL && s->_raw_size != 0) - return false; - } - - if (hplink->root.dynamic_sections_created) - { - /* Like IA-64 and HPPA64, always create a DT_PLTGOT. It - actually has nothing to do with the PLT, it is how we - communicate the LTP value of a load module to the dynamic - linker. */ - if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)) - return false; - - /* Add some entries to the .dynamic section. We fill in the - values later, in elf32_hppa_finish_dynamic_sections, but we - must add the entries now so that we get the correct size for - the .dynamic section. The DT_DEBUG entry is filled in by the - dynamic linker and used by the debugger. */ - if (! info->shared) - { - if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0)) - return false; - } - - if (hplink->srelplt->_raw_size != 0) - { - if (! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0) - || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA) - || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0)) - return false; - } - - if (relocs) - { - if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0) - || ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0) - || ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT, - sizeof (Elf32_External_Rela))) - return false; - } - - if (reltext) - { - if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0)) - return false; - info->flags |= DF_TEXTREL; - } - } - - return true; -} - -/* External entry points for sizing and building linker stubs. */ - -/* Determine and set the size of the stub section for a final link. - - The basic idea here is to examine all the relocations looking for - PC-relative calls to a target that is unreachable with a "bl" - instruction. */ - -boolean -elf32_hppa_size_stubs (output_bfd, stub_bfd, info, multi_subspace, group_size, - add_stub_section, layout_sections_again) - bfd *output_bfd; - bfd *stub_bfd; - struct bfd_link_info *info; - boolean multi_subspace; - bfd_signed_vma group_size; - asection * (*add_stub_section) PARAMS ((const char *, asection *)); - void (*layout_sections_again) PARAMS ((void)); -{ - bfd *input_bfd; - asection *section; - asection **input_list, **list; - Elf_Internal_Sym *local_syms, **all_local_syms; - unsigned int bfd_indx, bfd_count; - int top_id, top_index; - struct elf32_hppa_link_hash_table *hplink; - bfd_size_type stub_group_size; - boolean stubs_always_before_branch; - boolean stub_changed = 0; - boolean ret = 0; - - hplink = hppa_link_hash_table (info); - - /* Stash our params away. */ - hplink->stub_bfd = stub_bfd; - hplink->multi_subspace = multi_subspace; - hplink->add_stub_section = add_stub_section; - hplink->layout_sections_again = layout_sections_again; - stubs_always_before_branch = group_size < 0; - if (group_size < 0) - stub_group_size = -group_size; - else - stub_group_size = group_size; - if (stub_group_size == 1) - { - /* Default values. */ - stub_group_size = 8000000; - if (hplink->has_17bit_branch || hplink->multi_subspace) - stub_group_size = 250000; - if (hplink->has_12bit_branch) - stub_group_size = 7812; - } - - /* Count the number of input BFDs and find the top input section id. */ - for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; - input_bfd != NULL; - input_bfd = input_bfd->link_next) - { - bfd_count += 1; - for (section = input_bfd->sections; - section != NULL; - section = section->next) - { - if (top_id < section->id) - top_id = section->id; - } - } - - hplink->stub_group - = (struct map_stub *) bfd_zmalloc (sizeof (struct map_stub) * (top_id + 1)); - if (hplink->stub_group == NULL) - return false; - - /* Make a list of input sections for each output section included in - the link. - - We can't use output_bfd->section_count here to find the top output - section index as some sections may have been removed, and - _bfd_strip_section_from_output doesn't renumber the indices. */ - for (section = output_bfd->sections, top_index = 0; - section != NULL; - section = section->next) - { - if (top_index < section->index) - top_index = section->index; - } - - input_list - = (asection **) bfd_malloc (sizeof (asection *) * (top_index + 1)); - if (input_list == NULL) - return false; - - /* For sections we aren't interested in, mark their entries with a - value we can check later. */ - list = input_list + top_index; - do - *list = bfd_abs_section_ptr; - while (list-- != input_list); - - for (section = output_bfd->sections; - section != NULL; - section = section->next) - { - if ((section->flags & SEC_CODE) != 0) - input_list[section->index] = NULL; - } - - /* Now actually build the lists. */ - for (input_bfd = info->input_bfds; - input_bfd != NULL; - input_bfd = input_bfd->link_next) - { - for (section = input_bfd->sections; - section != NULL; - section = section->next) - { - if (section->output_section != NULL - && section->output_section->owner == output_bfd - && section->output_section->index <= top_index) - { - list = input_list + section->output_section->index; - if (*list != bfd_abs_section_ptr) - { - /* Steal the link_sec pointer for our list. */ -#define PREV_SEC(sec) (hplink->stub_group[(sec)->id].link_sec) - /* This happens to make the list in reverse order, - which is what we want. */ - PREV_SEC (section) = *list; - *list = section; - } - } - } - } - - /* See whether we can group stub sections together. Grouping stub - sections may result in fewer stubs. More importantly, we need to - put all .init* and .fini* stubs at the beginning of the .init or - .fini output sections respectively, because glibc splits the - _init and _fini functions into multiple parts. Putting a stub in - the middle of a function is not a good idea. */ - list = input_list + top_index; - do - { - asection *tail = *list; - if (tail == bfd_abs_section_ptr) - continue; - while (tail != NULL) - { - asection *curr; - asection *prev; - bfd_size_type total; - - curr = tail; - if (tail->_cooked_size) - total = tail->_cooked_size; - else - total = tail->_raw_size; - while ((prev = PREV_SEC (curr)) != NULL - && ((total += curr->output_offset - prev->output_offset) - < stub_group_size)) - curr = prev; - - /* OK, the size from the start of CURR to the end is less - than 250000 bytes and thus can be handled by one stub - section. (or the tail section is itself larger than - 250000 bytes, in which case we may be toast.) - We should really be keeping track of the total size of - stubs added here, as stubs contribute to the final output - section size. That's a little tricky, and this way will - only break if stubs added total more than 12144 bytes, or - 1518 long branch stubs. It seems unlikely for more than - 1518 different functions to be called, especially from - code only 250000 bytes long. */ - do - { - prev = PREV_SEC (tail); - /* Set up this stub group. */ - hplink->stub_group[tail->id].link_sec = curr; - } - while (tail != curr && (tail = prev) != NULL); - - /* But wait, there's more! Input sections up to 250000 - bytes before the stub section can be handled by it too. */ - if (!stubs_always_before_branch) - { - total = 0; - while (prev != NULL - && ((total += tail->output_offset - prev->output_offset) - < stub_group_size)) - { - tail = prev; - prev = PREV_SEC (tail); - hplink->stub_group[tail->id].link_sec = curr; - } - } - tail = prev; - } - } - while (list-- != input_list); - free (input_list); -#undef PREV_SEC - - /* We want to read in symbol extension records only once. To do this - we need to read in the local symbols in parallel and save them for - later use; so hold pointers to the local symbols in an array. */ - all_local_syms - = (Elf_Internal_Sym **) bfd_zmalloc (sizeof (Elf_Internal_Sym *) - * bfd_count); - if (all_local_syms == NULL) - return false; - - /* Walk over all the input BFDs, swapping in local symbols. - If we are creating a shared library, create hash entries for the - export stubs. */ - for (input_bfd = info->input_bfds, bfd_indx = 0; - input_bfd != NULL; - input_bfd = input_bfd->link_next, bfd_indx++) - { - Elf_Internal_Shdr *symtab_hdr; - Elf_Internal_Sym *isym; - Elf32_External_Sym *ext_syms, *esym, *end_sy; - - /* We'll need the symbol table in a second. */ - symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; - if (symtab_hdr->sh_info == 0) - continue; - - /* We need an array of the local symbols attached to the input bfd. - Unfortunately, we're going to have to read & swap them in. */ - local_syms = (Elf_Internal_Sym *) - bfd_malloc (symtab_hdr->sh_info * sizeof (Elf_Internal_Sym)); - if (local_syms == NULL) - { - goto error_ret_free_local; - } - all_local_syms[bfd_indx] = local_syms; - ext_syms = (Elf32_External_Sym *) - bfd_malloc (symtab_hdr->sh_info * sizeof (Elf32_External_Sym)); - if (ext_syms == NULL) - { - goto error_ret_free_local; - } - - if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 - || (bfd_read (ext_syms, 1, - (symtab_hdr->sh_info * sizeof (Elf32_External_Sym)), - input_bfd) - != (symtab_hdr->sh_info * sizeof (Elf32_External_Sym)))) - { - free (ext_syms); - goto error_ret_free_local; - } - - /* Swap the local symbols in. */ - isym = local_syms; - esym = ext_syms; - for (end_sy = esym + symtab_hdr->sh_info; esym < end_sy; esym++, isym++) - bfd_elf32_swap_symbol_in (input_bfd, esym, isym); - - /* Now we can free the external symbols. */ - free (ext_syms); - -#if ! LONG_BRANCH_PIC_IN_SHLIB - /* If this is a shared link, find all the stub reloc sections. */ - if (info->shared) - for (section = input_bfd->sections; - section != NULL; - section = section->next) - { - char *name; - asection *reloc_sec; - - name = bfd_malloc (strlen (section->name) - + sizeof STUB_SUFFIX - + 5); - if (name == NULL) - return false; - sprintf (name, ".rela%s%s", section->name, STUB_SUFFIX); - reloc_sec = bfd_get_section_by_name (hplink->root.dynobj, name); - hplink->stub_group[section->id].reloc_sec = reloc_sec; - free (name); - } -#endif - - if (info->shared && hplink->multi_subspace) - { - struct elf_link_hash_entry **sym_hashes; - struct elf_link_hash_entry **end_hashes; - unsigned int symcount; - - symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) - - symtab_hdr->sh_info); - sym_hashes = elf_sym_hashes (input_bfd); - end_hashes = sym_hashes + symcount; - - /* Look through the global syms for functions; We need to - build export stubs for all globally visible functions. */ - for (; sym_hashes < end_hashes; sym_hashes++) - { - struct elf32_hppa_link_hash_entry *hash; - - hash = (struct elf32_hppa_link_hash_entry *) *sym_hashes; - - while (hash->elf.root.type == bfd_link_hash_indirect - || hash->elf.root.type == bfd_link_hash_warning) - hash = ((struct elf32_hppa_link_hash_entry *) - hash->elf.root.u.i.link); - - /* At this point in the link, undefined syms have been - resolved, so we need to check that the symbol was - defined in this BFD. */ - if ((hash->elf.root.type == bfd_link_hash_defined - || hash->elf.root.type == bfd_link_hash_defweak) - && hash->elf.type == STT_FUNC - && hash->elf.root.u.def.section->output_section != NULL - && (hash->elf.root.u.def.section->output_section->owner - == output_bfd) - && hash->elf.root.u.def.section->owner == input_bfd - && (hash->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) - && !(hash->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) - && ELF_ST_VISIBILITY (hash->elf.other) == STV_DEFAULT) - { - asection *sec; - const char *stub_name; - struct elf32_hppa_stub_hash_entry *stub_entry; - - sec = hash->elf.root.u.def.section; - stub_name = hash->elf.root.root.string; - stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table, - stub_name, - false, false); - if (stub_entry == NULL) - { - stub_entry = hppa_add_stub (stub_name, sec, hplink); - if (!stub_entry) - goto error_ret_free_local; - - stub_entry->target_value = hash->elf.root.u.def.value; - stub_entry->target_section = hash->elf.root.u.def.section; - stub_entry->stub_type = hppa_stub_export; - stub_entry->h = hash; - stub_changed = 1; - } - else - { - (*_bfd_error_handler) (_("%s: duplicate export stub %s"), - bfd_get_filename (input_bfd), - stub_name); - } - } - } - } - } - - while (1) - { - asection *stub_sec; - - for (input_bfd = info->input_bfds, bfd_indx = 0; - input_bfd != NULL; - input_bfd = input_bfd->link_next, bfd_indx++) - { - Elf_Internal_Shdr *symtab_hdr; - - /* We'll need the symbol table in a second. */ - symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; - if (symtab_hdr->sh_info == 0) - continue; - - local_syms = all_local_syms[bfd_indx]; - - /* Walk over each section attached to the input bfd. */ - for (section = input_bfd->sections; - section != NULL; - section = section->next) - { - Elf_Internal_Shdr *input_rel_hdr; - Elf32_External_Rela *external_relocs, *erelaend, *erela; - Elf_Internal_Rela *internal_relocs, *irelaend, *irela; - - /* If there aren't any relocs, then there's nothing more - to do. */ - if ((section->flags & SEC_RELOC) == 0 - || section->reloc_count == 0) - continue; - - /* If this section is a link-once section that will be - discarded, then don't create any stubs. */ - if (section->output_section == NULL - || section->output_section->owner != output_bfd) - continue; - - /* Allocate space for the external relocations. */ - external_relocs - = ((Elf32_External_Rela *) - bfd_malloc (section->reloc_count - * sizeof (Elf32_External_Rela))); - if (external_relocs == NULL) - { - goto error_ret_free_local; - } - - /* Likewise for the internal relocations. */ - internal_relocs = ((Elf_Internal_Rela *) - bfd_malloc (section->reloc_count - * sizeof (Elf_Internal_Rela))); - if (internal_relocs == NULL) - { - free (external_relocs); - goto error_ret_free_local; - } - - /* Read in the external relocs. */ - input_rel_hdr = &elf_section_data (section)->rel_hdr; - if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0 - || bfd_read (external_relocs, 1, - input_rel_hdr->sh_size, - input_bfd) != input_rel_hdr->sh_size) - { - free (external_relocs); - error_ret_free_internal: - free (internal_relocs); - goto error_ret_free_local; - } - - /* Swap in the relocs. */ - erela = external_relocs; - erelaend = erela + section->reloc_count; - irela = internal_relocs; - for (; erela < erelaend; erela++, irela++) - bfd_elf32_swap_reloca_in (input_bfd, erela, irela); - - /* We're done with the external relocs, free them. */ - free (external_relocs); - - /* Now examine each relocation. */ - irela = internal_relocs; - irelaend = irela + section->reloc_count; - for (; irela < irelaend; irela++) - { - unsigned int r_type, r_indx; - enum elf32_hppa_stub_type stub_type; - struct elf32_hppa_stub_hash_entry *stub_entry; - asection *sym_sec; - bfd_vma sym_value; - bfd_vma destination; - struct elf32_hppa_link_hash_entry *hash; - char *stub_name; - const asection *id_sec; - - r_type = ELF32_R_TYPE (irela->r_info); - r_indx = ELF32_R_SYM (irela->r_info); - - if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED) - { - bfd_set_error (bfd_error_bad_value); - goto error_ret_free_internal; - } - - /* Only look for stubs on call instructions. */ - if (r_type != (unsigned int) R_PARISC_PCREL12F - && r_type != (unsigned int) R_PARISC_PCREL17F - && r_type != (unsigned int) R_PARISC_PCREL22F) - continue; - - /* Now determine the call target, its name, value, - section. */ - sym_sec = NULL; - sym_value = 0; - destination = 0; - hash = NULL; - if (r_indx < symtab_hdr->sh_info) - { - /* It's a local symbol. */ - Elf_Internal_Sym *sym; - Elf_Internal_Shdr *hdr; - - sym = local_syms + r_indx; - hdr = elf_elfsections (input_bfd)[sym->st_shndx]; - sym_sec = hdr->bfd_section; - if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) - sym_value = sym->st_value; - destination = (sym_value + irela->r_addend - + sym_sec->output_offset - + sym_sec->output_section->vma); - } - else - { - /* It's an external symbol. */ - int e_indx; - - e_indx = r_indx - symtab_hdr->sh_info; - hash = ((struct elf32_hppa_link_hash_entry *) - elf_sym_hashes (input_bfd)[e_indx]); - - while (hash->elf.root.type == bfd_link_hash_indirect - || hash->elf.root.type == bfd_link_hash_warning) - hash = ((struct elf32_hppa_link_hash_entry *) - hash->elf.root.u.i.link); - - if (hash->elf.root.type == bfd_link_hash_defined - || hash->elf.root.type == bfd_link_hash_defweak) - { - sym_sec = hash->elf.root.u.def.section; - sym_value = hash->elf.root.u.def.value; - if (sym_sec->output_section != NULL) - destination = (sym_value + irela->r_addend - + sym_sec->output_offset - + sym_sec->output_section->vma); - } - else if (hash->elf.root.type == bfd_link_hash_undefweak) - { - if (! info->shared) - continue; - } - else if (hash->elf.root.type == bfd_link_hash_undefined) - { - if (! (info->shared - && !info->no_undefined - && (ELF_ST_VISIBILITY (hash->elf.other) - == STV_DEFAULT))) - continue; - } - else - { - bfd_set_error (bfd_error_bad_value); - goto error_ret_free_internal; - } - } - - /* Determine what (if any) linker stub is needed. */ - stub_type = hppa_type_of_stub (section, irela, hash, - destination); - if (stub_type == hppa_stub_none) - continue; - - /* Support for grouping stub sections. */ - id_sec = hplink->stub_group[section->id].link_sec; - - /* Get the name of this stub. */ - stub_name = hppa_stub_name (id_sec, sym_sec, hash, irela); - if (!stub_name) - goto error_ret_free_internal; - - stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table, - stub_name, - false, false); - if (stub_entry != NULL) - { - /* The proper stub has already been created. */ - free (stub_name); - continue; - } - - stub_entry = hppa_add_stub (stub_name, section, hplink); - if (stub_entry == NULL) - { - free (stub_name); - goto error_ret_free_local; - } - - stub_entry->target_value = sym_value; - stub_entry->target_section = sym_sec; - stub_entry->stub_type = stub_type; - if (info->shared) - { - if (stub_type == hppa_stub_import) - stub_entry->stub_type = hppa_stub_import_shared; - else if (stub_type == hppa_stub_long_branch - && (LONG_BRANCH_PIC_IN_SHLIB || hash == NULL)) - stub_entry->stub_type = hppa_stub_long_branch_shared; - } - stub_entry->h = hash; - stub_changed = 1; - } - - /* We're done with the internal relocs, free them. */ - free (internal_relocs); - } - } - - if (!stub_changed) - break; - - /* OK, we've added some stubs. Find out the new size of the - stub sections. */ - for (stub_sec = hplink->stub_bfd->sections; - stub_sec != NULL; - stub_sec = stub_sec->next) - { - stub_sec->_raw_size = 0; - stub_sec->_cooked_size = 0; - } -#if ! LONG_BRANCH_PIC_IN_SHLIB - { - int i; - - for (i = top_id; i >= 0; --i) - { - /* This will probably hit the same section many times.. */ - stub_sec = hplink->stub_group[i].reloc_sec; - if (stub_sec != NULL) - { - stub_sec->_raw_size = 0; - stub_sec->_cooked_size = 0; - } - } - } -#endif - - bfd_hash_traverse (&hplink->stub_hash_table, - hppa_size_one_stub, - hplink); - - /* Ask the linker to do its stuff. */ - (*hplink->layout_sections_again) (); - stub_changed = 0; - } - - ret = 1; - - error_ret_free_local: - while (bfd_count-- > 0) - if (all_local_syms[bfd_count]) - free (all_local_syms[bfd_count]); - free (all_local_syms); - - return ret; -} - -/* For a final link, this function is called after we have sized the - stubs to provide a value for __gp. */ - -boolean -elf32_hppa_set_gp (abfd, info) - bfd *abfd; - struct bfd_link_info *info; -{ - struct elf32_hppa_link_hash_table *hplink; - struct elf_link_hash_entry *h; - asection *sec; - bfd_vma gp_val; - - hplink = hppa_link_hash_table (info); - h = elf_link_hash_lookup (&hplink->root, "$global$", - false, false, false); - - if (h != NULL - && (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak)) - { - gp_val = h->root.u.def.value; - sec = h->root.u.def.section; - } - else - { - /* Choose to point our LTP at, in this order, one of .plt, .got, - or .data, if these sections exist. In the case of choosing - .plt try to make the LTP ideal for addressing anywhere in the - .plt or .got with a 14 bit signed offset. Typically, the end - of the .plt is the start of the .got, so choose .plt + 0x2000 - if either the .plt or .got is larger than 0x2000. If both - the .plt and .got are smaller than 0x2000, choose the end of - the .plt section. */ - - sec = hplink->splt; - if (sec != NULL) - { - gp_val = sec->_raw_size; - if (gp_val > 0x2000 - || (hplink->sgot && hplink->sgot->_raw_size > 0x2000)) - { - gp_val = 0x2000; - } - } - else - { - gp_val = 0; - sec = hplink->sgot; - if (sec != NULL) - { - /* We know we don't have a .plt. If .got is large, - offset our LTP. */ - if (sec->_raw_size > 0x2000) - gp_val = 0x2000; - } - else - { - /* No .plt or .got. Who cares what the LTP is? */ - sec = bfd_get_section_by_name (abfd, ".data"); - } - } - - if (h != NULL) - { - h->root.type = bfd_link_hash_defined; - h->root.u.def.value = gp_val; - if (sec != NULL) - h->root.u.def.section = sec; - else - h->root.u.def.section = bfd_abs_section_ptr; - } - } - - if (sec != NULL && sec->output_section != NULL) - gp_val += sec->output_section->vma + sec->output_offset; - - elf_gp (abfd) = gp_val; - return true; -} - -/* Build all the stubs associated with the current output file. The - stubs are kept in a hash table attached to the main linker hash - table. We also set up the .plt entries for statically linked PIC - functions here. This function is called via hppaelf_finish in the - linker. */ - -boolean -elf32_hppa_build_stubs (info) - struct bfd_link_info *info; -{ - asection *stub_sec; - struct bfd_hash_table *table; - struct elf32_hppa_link_hash_table *hplink; - - hplink = hppa_link_hash_table (info); - - for (stub_sec = hplink->stub_bfd->sections; - stub_sec != NULL; - stub_sec = stub_sec->next) - { - size_t size; - - /* Allocate memory to hold the linker stubs. */ - size = stub_sec->_raw_size; - stub_sec->contents = (unsigned char *) bfd_zalloc (hplink->stub_bfd, - size); - if (stub_sec->contents == NULL && size != 0) - return false; - stub_sec->_raw_size = 0; - } - - /* Build the stubs as directed by the stub hash table. */ - table = &hplink->stub_hash_table; - bfd_hash_traverse (table, hppa_build_one_stub, info); - - return true; -} - -/* Perform a final link. */ - -static boolean -elf32_hppa_final_link (abfd, info) - bfd *abfd; - struct bfd_link_info *info; -{ - asection *s; - - /* Invoke the regular ELF linker to do all the work. */ - if (!bfd_elf32_bfd_final_link (abfd, info)) - return false; - - /* If we're producing a final executable, sort the contents of the - unwind section. Magic section names, but this is much safer than - having elf32_hppa_relocate_section remember where SEGREL32 relocs - occurred. Consider what happens if someone inept creates a - linker script that puts unwind information in .text. */ - s = bfd_get_section_by_name (abfd, ".PARISC.unwind"); - if (s != NULL) - { - bfd_size_type size; - char *contents; - - size = s->_raw_size; - contents = bfd_malloc (size); - if (contents == NULL) - return false; - - if (! bfd_get_section_contents (abfd, s, contents, (file_ptr) 0, size)) - return false; - - qsort (contents, size / 16, 16, hppa_unwind_entry_compare); - - if (! bfd_set_section_contents (abfd, s, contents, (file_ptr) 0, size)) - return false; - } - return true; -} - -/* Record the lowest address for the data and text segments. */ - -static void -hppa_record_segment_addr (abfd, section, data) - bfd *abfd ATTRIBUTE_UNUSED; - asection *section; - PTR data; -{ - struct elf32_hppa_link_hash_table *hplink; - - hplink = (struct elf32_hppa_link_hash_table *) data; - - if ((section->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) - { - bfd_vma value = section->vma - section->filepos; - - if ((section->flags & SEC_READONLY) != 0) - { - if (value < hplink->text_segment_base) - hplink->text_segment_base = value; - } - else - { - if (value < hplink->data_segment_base) - hplink->data_segment_base = value; - } - } -} - -/* Perform a relocation as part of a final link. */ - -static bfd_reloc_status_type -final_link_relocate (input_section, contents, rel, value, hplink, sym_sec, h) - asection *input_section; - bfd_byte *contents; - const Elf_Internal_Rela *rel; - bfd_vma value; - struct elf32_hppa_link_hash_table *hplink; - asection *sym_sec; - struct elf32_hppa_link_hash_entry *h; -{ - int insn; - unsigned int r_type = ELF32_R_TYPE (rel->r_info); - reloc_howto_type *howto = elf_hppa_howto_table + r_type; - int r_format = howto->bitsize; - enum hppa_reloc_field_selector_type_alt r_field; - bfd *input_bfd = input_section->owner; - bfd_vma offset = rel->r_offset; - bfd_vma max_branch_offset = 0; - bfd_byte *hit_data = contents + offset; - bfd_signed_vma addend = rel->r_addend; - bfd_vma location; - struct elf32_hppa_stub_hash_entry *stub_entry = NULL; - int val; - - if (r_type == R_PARISC_NONE) - return bfd_reloc_ok; - - insn = bfd_get_32 (input_bfd, hit_data); - - /* Find out where we are and where we're going. */ - location = (offset + - input_section->output_offset + - input_section->output_section->vma); - - switch (r_type) - { - case R_PARISC_PCREL12F: - case R_PARISC_PCREL17F: - case R_PARISC_PCREL22F: - /* If this is a call to a function defined in another dynamic - library, or if it is a call to a PIC function in the same - object, or if this is a shared link and it is a call to a - weak symbol which may or may not be in the same object, then - find the import stub in the stub hash. */ - if (sym_sec == NULL - || sym_sec->output_section == NULL - || (h != NULL - && ((h->maybe_pic_call - && !(input_section->flags & SEC_HAS_GOT_REF)) - || (h->elf.root.type == bfd_link_hash_defweak - && h->elf.dynindx != -1 - && h->elf.plt.offset != (bfd_vma) -1)))) - { - stub_entry = hppa_get_stub_entry (input_section, sym_sec, - h, rel, hplink); - if (stub_entry != NULL) - { - value = (stub_entry->stub_offset - + stub_entry->stub_sec->output_offset - + stub_entry->stub_sec->output_section->vma); - addend = 0; - } - else if (sym_sec == NULL && h != NULL - && h->elf.root.type == bfd_link_hash_undefweak) - { - /* It's OK if undefined weak. Calls to undefined weak - symbols behave as if the "called" function - immediately returns. We can thus call to a weak - function without first checking whether the function - is defined. */ - value = location; - addend = 8; - } - else - return bfd_reloc_notsupported; - } - /* Fall thru. */ - - case R_PARISC_PCREL21L: - case R_PARISC_PCREL17C: - case R_PARISC_PCREL17R: - case R_PARISC_PCREL14R: - case R_PARISC_PCREL14F: - /* Make it a pc relative offset. */ - value -= location; - addend -= 8; - break; - - case R_PARISC_DPREL21L: - case R_PARISC_DPREL14R: - case R_PARISC_DPREL14F: - /* For all the DP relative relocations, we need to examine the symbol's - section. If it's a code section, then "data pointer relative" makes - no sense. In that case we don't adjust the "value", and for 21 bit - addil instructions, we change the source addend register from %dp to - %r0. This situation commonly arises when a variable's "constness" - is declared differently from the way the variable is defined. For - instance: "extern int foo" with foo defined as "const int foo". */ - if (sym_sec == NULL) - break; - if ((sym_sec->flags & SEC_CODE) != 0) - { - if ((insn & ((0x3f << 26) | (0x1f << 21))) - == (((int) OP_ADDIL << 26) | (27 << 21))) - { - insn &= ~ (0x1f << 21); -#if 1 /* debug them. */ - (*_bfd_error_handler) - (_("%s(%s+0x%lx): fixing %s"), - bfd_get_filename (input_bfd), - input_section->name, - (long) rel->r_offset, - howto->name); -#endif - } - /* Now try to make things easy for the dynamic linker. */ - - break; - } - /* Fall thru. */ - - case R_PARISC_DLTIND21L: - case R_PARISC_DLTIND14R: - case R_PARISC_DLTIND14F: - value -= elf_gp (input_section->output_section->owner); - break; - - case R_PARISC_SEGREL32: - if ((sym_sec->flags & SEC_CODE) != 0) - value -= hplink->text_segment_base; - else - value -= hplink->data_segment_base; - break; - - default: - break; - } - - switch (r_type) - { - case R_PARISC_DIR32: - case R_PARISC_DIR14F: - case R_PARISC_DIR17F: - case R_PARISC_PCREL17C: - case R_PARISC_PCREL14F: - case R_PARISC_DPREL14F: - case R_PARISC_PLABEL32: - case R_PARISC_DLTIND14F: - case R_PARISC_SEGBASE: - case R_PARISC_SEGREL32: - r_field = e_fsel; - break; - - case R_PARISC_DIR21L: - case R_PARISC_PCREL21L: - case R_PARISC_DPREL21L: - case R_PARISC_PLABEL21L: - case R_PARISC_DLTIND21L: - r_field = e_lrsel; - break; - - case R_PARISC_DIR17R: - case R_PARISC_PCREL17R: - case R_PARISC_DIR14R: - case R_PARISC_PCREL14R: - case R_PARISC_DPREL14R: - case R_PARISC_PLABEL14R: - case R_PARISC_DLTIND14R: - r_field = e_rrsel; - break; - - case R_PARISC_PCREL12F: - case R_PARISC_PCREL17F: - case R_PARISC_PCREL22F: - r_field = e_fsel; - - if (r_type == (unsigned int) R_PARISC_PCREL17F) - { - max_branch_offset = (1 << (17-1)) << 2; - } - else if (r_type == (unsigned int) R_PARISC_PCREL12F) - { - max_branch_offset = (1 << (12-1)) << 2; - } - else - { - max_branch_offset = (1 << (22-1)) << 2; - } - - /* sym_sec is NULL on undefined weak syms or when shared on - undefined syms. We've already checked for a stub for the - shared undefined case. */ - if (sym_sec == NULL) - break; - - /* If the branch is out of reach, then redirect the - call to the local stub for this function. */ - if (value + addend + max_branch_offset >= 2*max_branch_offset) - { - stub_entry = hppa_get_stub_entry (input_section, sym_sec, - h, rel, hplink); - if (stub_entry == NULL) - return bfd_reloc_notsupported; - - /* Munge up the value and addend so that we call the stub - rather than the procedure directly. */ - value = (stub_entry->stub_offset - + stub_entry->stub_sec->output_offset - + stub_entry->stub_sec->output_section->vma - - location); - addend = -8; - } - break; - - /* Something we don't know how to handle. */ - default: - return bfd_reloc_notsupported; - } - - /* Make sure we can reach the stub. */ - if (max_branch_offset != 0 - && value + addend + max_branch_offset >= 2*max_branch_offset) - { - (*_bfd_error_handler) - (_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"), - bfd_get_filename (input_bfd), - input_section->name, - (long) rel->r_offset, - stub_entry->root.string); - return bfd_reloc_notsupported; - } - - val = hppa_field_adjust (value, addend, r_field); - - switch (r_type) - { - case R_PARISC_PCREL12F: - case R_PARISC_PCREL17C: - case R_PARISC_PCREL17F: - case R_PARISC_PCREL17R: - case R_PARISC_PCREL22F: - case R_PARISC_DIR17F: - case R_PARISC_DIR17R: - /* This is a branch. Divide the offset by four. - Note that we need to decide whether it's a branch or - otherwise by inspecting the reloc. Inspecting insn won't - work as insn might be from a .word directive. */ - val >>= 2; - break; - - default: - break; - } - - insn = hppa_rebuild_insn (insn, val, r_format); - - /* Update the instruction word. */ - bfd_put_32 (input_bfd, (bfd_vma) insn, hit_data); - return bfd_reloc_ok; -} - -/* Relocate an HPPA ELF section. */ - -static boolean -elf32_hppa_relocate_section (output_bfd, info, input_bfd, input_section, - contents, relocs, local_syms, local_sections) - bfd *output_bfd; - struct bfd_link_info *info; - bfd *input_bfd; - asection *input_section; - bfd_byte *contents; - Elf_Internal_Rela *relocs; - Elf_Internal_Sym *local_syms; - asection **local_sections; -{ - bfd *dynobj; - bfd_vma *local_got_offsets; - struct elf32_hppa_link_hash_table *hplink; - Elf_Internal_Shdr *symtab_hdr; - Elf_Internal_Rela *rel; - Elf_Internal_Rela *relend; - asection *sreloc; - - symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; - - hplink = hppa_link_hash_table (info); - dynobj = hplink->root.dynobj; - local_got_offsets = elf_local_got_offsets (input_bfd); - sreloc = NULL; - - rel = relocs; - relend = relocs + input_section->reloc_count; - for (; rel < relend; rel++) - { - unsigned int r_type; - reloc_howto_type *howto; - unsigned int r_symndx; - struct elf32_hppa_link_hash_entry *h; - Elf_Internal_Sym *sym; - asection *sym_sec; - bfd_vma relocation; - bfd_reloc_status_type r; - const char *sym_name; - boolean plabel; - bfd_vma off; - - r_type = ELF32_R_TYPE (rel->r_info); - if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED) - { - bfd_set_error (bfd_error_bad_value); - return false; - } - if (r_type == (unsigned int) R_PARISC_GNU_VTENTRY - || r_type == (unsigned int) R_PARISC_GNU_VTINHERIT) - continue; - - r_symndx = ELF32_R_SYM (rel->r_info); - - if (info->relocateable) - { - /* This is a relocateable link. We don't have to change - anything, unless the reloc is against a section symbol, - in which case we have to adjust according to where the - section symbol winds up in the output section. */ - if (r_symndx < symtab_hdr->sh_info) - { - sym = local_syms + r_symndx; - if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) - { - sym_sec = local_sections[r_symndx]; - rel->r_addend += sym_sec->output_offset; - } - } - continue; - } - - /* This is a final link. */ - h = NULL; - sym = NULL; - sym_sec = NULL; - if (r_symndx < symtab_hdr->sh_info) - { - /* This is a local symbol, h defaults to NULL. */ - sym = local_syms + r_symndx; - sym_sec = local_sections[r_symndx]; - relocation = ((ELF_ST_TYPE (sym->st_info) == STT_SECTION - ? 0 : sym->st_value) - + sym_sec->output_offset - + sym_sec->output_section->vma); - } - else - { - int indx; - - /* It's a global; Find its entry in the link hash. */ - indx = r_symndx - symtab_hdr->sh_info; - h = ((struct elf32_hppa_link_hash_entry *) - elf_sym_hashes (input_bfd)[indx]); - while (h->elf.root.type == bfd_link_hash_indirect - || h->elf.root.type == bfd_link_hash_warning) - h = (struct elf32_hppa_link_hash_entry *) h->elf.root.u.i.link; - - relocation = 0; - if (h->elf.root.type == bfd_link_hash_defined - || h->elf.root.type == bfd_link_hash_defweak) - { - sym_sec = h->elf.root.u.def.section; - /* If sym_sec->output_section is NULL, then it's a - symbol defined in a shared library. */ - if (sym_sec->output_section != NULL) - relocation = (h->elf.root.u.def.value - + sym_sec->output_offset - + sym_sec->output_section->vma); - } - else if (h->elf.root.type == bfd_link_hash_undefweak) - ; - else if (info->shared && !info->no_undefined - && ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT - && h->elf.type != STT_PARISC_MILLI) - { - if (info->symbolic) - if (!((*info->callbacks->undefined_symbol) - (info, h->elf.root.root.string, input_bfd, - input_section, rel->r_offset, false))) - return false; - } - else - { - if (!((*info->callbacks->undefined_symbol) - (info, h->elf.root.root.string, input_bfd, - input_section, rel->r_offset, true))) - return false; - } - } - - /* Do any required modifications to the relocation value, and - determine what types of dynamic info we need to output, if - any. */ - plabel = 0; - switch (r_type) - { - case R_PARISC_DLTIND14F: - case R_PARISC_DLTIND14R: - case R_PARISC_DLTIND21L: - /* Relocation is to the entry for this symbol in the global - offset table. */ - if (h != NULL) - { - boolean dyn; - - off = h->elf.got.offset; - dyn = hplink->root.dynamic_sections_created; - if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, &h->elf)) - { - /* This is actually a static link, or it is a - -Bsymbolic link and the symbol is defined - locally, or the symbol was forced to be local - because of a version file. We must initialize - this entry in the global offset table. Since the - offset must always be a multiple of 4, we use the - least significant bit to record whether we have - initialized it already. - - When doing a dynamic link, we create a .rela.got - relocation entry to initialize the value. This - is done in the finish_dynamic_symbol routine. */ - if ((off & 1) != 0) - off &= ~1; - else - { - bfd_put_32 (output_bfd, relocation, - hplink->sgot->contents + off); - h->elf.got.offset |= 1; - } - } - } - else - { - /* Local symbol case. */ - if (local_got_offsets == NULL) - abort (); - - off = local_got_offsets[r_symndx]; - - /* The offset must always be a multiple of 4. We use - the least significant bit to record whether we have - already generated the necessary reloc. */ - if ((off & 1) != 0) - off &= ~1; - else - { - bfd_put_32 (output_bfd, relocation, - hplink->sgot->contents + off); - - if (info->shared) - { - /* Output a dynamic relocation for this GOT - entry. In this case it is relative to the - base of the object because the symbol index - is zero. */ - Elf_Internal_Rela outrel; - asection *srelgot = hplink->srelgot; - - outrel.r_offset = (off - + hplink->sgot->output_offset - + hplink->sgot->output_section->vma); - outrel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32); - outrel.r_addend = relocation; - bfd_elf32_swap_reloca_out (output_bfd, &outrel, - ((Elf32_External_Rela *) - srelgot->contents - + srelgot->reloc_count)); - ++srelgot->reloc_count; - } - - local_got_offsets[r_symndx] |= 1; - } - } - - if (off >= (bfd_vma) -2) - abort (); - - /* Add the base of the GOT to the relocation value. */ - relocation = (off - + hplink->sgot->output_offset - + hplink->sgot->output_section->vma); - break; - - case R_PARISC_SEGREL32: - /* If this is the first SEGREL relocation, then initialize - the segment base values. */ - if (hplink->text_segment_base == (bfd_vma) -1) - bfd_map_over_sections (output_bfd, - hppa_record_segment_addr, - hplink); - break; - - case R_PARISC_PLABEL14R: - case R_PARISC_PLABEL21L: - case R_PARISC_PLABEL32: - if (hplink->root.dynamic_sections_created) - { - /* If we have a global symbol with a PLT slot, then - redirect this relocation to it. */ - if (h != NULL) - { - off = h->elf.plt.offset; - if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, &h->elf)) - { - /* In a non-shared link, adjust_dynamic_symbols - isn't called for symbols forced local. We - need to write out the plt entry here. */ - if ((off & 1) != 0) - off &= ~1; - else - { - bfd_put_32 (output_bfd, - relocation, - hplink->splt->contents + off); - bfd_put_32 (output_bfd, - elf_gp (hplink->splt->output_section->owner), - hplink->splt->contents + off + 4); - h->elf.plt.offset |= 1; - } - } - } - else - { - bfd_vma *local_plt_offsets; - - if (local_got_offsets == NULL) - abort (); - - local_plt_offsets = local_got_offsets + symtab_hdr->sh_info; - off = local_plt_offsets[r_symndx]; - - /* As for the local .got entry case, we use the last - bit to record whether we've already initialised - this local .plt entry. */ - if ((off & 1) != 0) - off &= ~1; - else - { - bfd_put_32 (output_bfd, - relocation, - hplink->splt->contents + off); - bfd_put_32 (output_bfd, - elf_gp (hplink->splt->output_section->owner), - hplink->splt->contents + off + 4); - - if (info->shared) - { - /* Output a dynamic IPLT relocation for this - PLT entry. */ - Elf_Internal_Rela outrel; - asection *srelplt = hplink->srelplt; - - outrel.r_offset = (off - + hplink->splt->output_offset - + hplink->splt->output_section->vma); - outrel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT); - outrel.r_addend = relocation; - bfd_elf32_swap_reloca_out (output_bfd, &outrel, - ((Elf32_External_Rela *) - srelplt->contents - + srelplt->reloc_count)); - ++srelplt->reloc_count; - } - - local_plt_offsets[r_symndx] |= 1; - } - } - - if (off >= (bfd_vma) -2) - abort (); - - /* PLABELs contain function pointers. Relocation is to - the entry for the function in the .plt. The magic +2 - offset signals to $$dyncall that the function pointer - is in the .plt and thus has a gp pointer too. - Exception: Undefined PLABELs should have a value of - zero. */ - if (h == NULL - || (h->elf.root.type != bfd_link_hash_undefweak - && h->elf.root.type != bfd_link_hash_undefined)) - { - relocation = (off - + hplink->splt->output_offset - + hplink->splt->output_section->vma - + 2); - } - plabel = 1; - } - /* Fall through and possibly emit a dynamic relocation. */ - - case R_PARISC_DIR17F: - case R_PARISC_DIR17R: - case R_PARISC_DIR14F: - case R_PARISC_DIR14R: - case R_PARISC_DIR21L: - case R_PARISC_DPREL14F: - case R_PARISC_DPREL14R: - case R_PARISC_DPREL21L: - case R_PARISC_DIR32: - /* The reloc types handled here and this conditional - expression must match the code in check_relocs and - hppa_discard_copies. ie. We need exactly the same - condition as in check_relocs, with some extra conditions - (dynindx test in this case) to cater for relocs removed - by hppa_discard_copies. If you squint, the non-shared - test here does indeed match the one in check_relocs, the - difference being that here we test DEF_DYNAMIC rather - than a maybe-DEF_DYNAMIC via !DEF_REGULAR. Common syms - end up with !DEF_REGULAR, which is why we can't use that - here. Conversely, DEF_DYNAMIC can't be used in - check_relocs as there all files have not been loaded. */ - if ((info->shared - && (input_section->flags & SEC_ALLOC) != 0 - && (IS_ABSOLUTE_RELOC (r_type) - || (h != NULL - && h->elf.dynindx != -1 - && (!info->symbolic - || (h->elf.elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0)))) - || (!info->shared - && (input_section->flags & SEC_ALLOC) != 0 - && h != NULL - && h->elf.dynindx != -1 - && (h->elf.elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 - && ((h->elf.elf_link_hash_flags - & ELF_LINK_HASH_DEF_DYNAMIC) != 0 - || h->elf.root.type == bfd_link_hash_undefweak - || h->elf.root.type == bfd_link_hash_undefined))) - { - Elf_Internal_Rela outrel; - boolean skip; - - /* When generating a shared object, these relocations - are copied into the output file to be resolved at run - time. */ - - if (sreloc == NULL) - { - const char *name; - - name = (bfd_elf_string_from_elf_section - (input_bfd, - elf_elfheader (input_bfd)->e_shstrndx, - elf_section_data (input_section)->rel_hdr.sh_name)); - if (name == NULL) - return false; - sreloc = bfd_get_section_by_name (dynobj, name); - if (sreloc == NULL) - abort (); - } - - outrel.r_offset = rel->r_offset; - outrel.r_addend = rel->r_addend; - skip = false; - if (elf_section_data (input_section)->stab_info != NULL) - { - bfd_vma off; - - off = (_bfd_stab_section_offset - (output_bfd, &hplink->root.stab_info, - input_section, - &elf_section_data (input_section)->stab_info, - rel->r_offset)); - if (off == (bfd_vma) -1) - skip = true; - outrel.r_offset = off; - } - - outrel.r_offset += (input_section->output_offset - + input_section->output_section->vma); - - if (skip) - { - memset (&outrel, 0, sizeof (outrel)); - } - else if (h != NULL - && h->elf.dynindx != -1 - && (plabel - || !IS_ABSOLUTE_RELOC (r_type) - || !info->shared - || !info->symbolic - || (h->elf.elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0)) - { - outrel.r_info = ELF32_R_INFO (h->elf.dynindx, r_type); - } - else /* It's a local symbol, or one marked to become local. */ - { - int indx = 0; - - /* Add the absolute offset of the symbol. */ - outrel.r_addend += relocation; - - /* Global plabels need to be processed by the - dynamic linker so that functions have at most one - fptr. For this reason, we need to differentiate - between global and local plabels, which we do by - providing the function symbol for a global plabel - reloc, and no symbol for local plabels. */ - if (! plabel - && sym_sec != NULL - && sym_sec->output_section != NULL - && ! bfd_is_abs_section (sym_sec)) - { - indx = elf_section_data (sym_sec->output_section)->dynindx; - /* We are turning this relocation into one - against a section symbol, so subtract out the - output section's address but not the offset - of the input section in the output section. */ - outrel.r_addend -= sym_sec->output_section->vma; - } - - outrel.r_info = ELF32_R_INFO (indx, r_type); - } -#if 0 - /* EH info can cause unaligned DIR32 relocs. - Tweak the reloc type for the dynamic linker. */ - if (r_type == R_PARISC_DIR32 && (outrel.r_offset & 3) != 0) - outrel.r_info = ELF32_R_INFO (ELF32_R_SYM (outrel.r_info), - R_PARISC_DIR32U); -#endif - bfd_elf32_swap_reloca_out (output_bfd, &outrel, - ((Elf32_External_Rela *) - sreloc->contents - + sreloc->reloc_count)); - ++sreloc->reloc_count; - } - break; - - default: - break; - } - - r = final_link_relocate (input_section, contents, rel, relocation, - hplink, sym_sec, h); - - if (r == bfd_reloc_ok) - continue; - - if (h != NULL) - sym_name = h->elf.root.root.string; - else - { - sym_name = bfd_elf_string_from_elf_section (input_bfd, - symtab_hdr->sh_link, - sym->st_name); - if (sym_name == NULL) - return false; - if (*sym_name == '\0') - sym_name = bfd_section_name (input_bfd, sym_sec); - } - - howto = elf_hppa_howto_table + r_type; - - if (r == bfd_reloc_undefined || r == bfd_reloc_notsupported) - { - (*_bfd_error_handler) - (_("%s(%s+0x%lx): cannot handle %s for %s"), - bfd_get_filename (input_bfd), - input_section->name, - (long) rel->r_offset, - howto->name, - sym_name); - } - else - { - if (!((*info->callbacks->reloc_overflow) - (info, sym_name, howto->name, (bfd_vma) 0, - input_bfd, input_section, rel->r_offset))) - return false; - } - } - - return true; -} - -/* Comparison function for qsort to sort unwind section during a - final link. */ - -static int -hppa_unwind_entry_compare (a, b) - const PTR a; - const PTR b; -{ - const bfd_byte *ap, *bp; - unsigned long av, bv; - - ap = (const bfd_byte *) a; - av = (unsigned long) ap[0] << 24; - av |= (unsigned long) ap[1] << 16; - av |= (unsigned long) ap[2] << 8; - av |= (unsigned long) ap[3]; - - bp = (const bfd_byte *) b; - bv = (unsigned long) bp[0] << 24; - bv |= (unsigned long) bp[1] << 16; - bv |= (unsigned long) bp[2] << 8; - bv |= (unsigned long) bp[3]; - - return av < bv ? -1 : av > bv ? 1 : 0; -} - -/* Finish up dynamic symbol handling. We set the contents of various - dynamic sections here. */ - -static boolean -elf32_hppa_finish_dynamic_symbol (output_bfd, info, h, sym) - bfd *output_bfd; - struct bfd_link_info *info; - struct elf_link_hash_entry *h; - Elf_Internal_Sym *sym; -{ - struct elf32_hppa_link_hash_table *hplink; - bfd *dynobj; - - hplink = hppa_link_hash_table (info); - dynobj = hplink->root.dynobj; - - if (h->plt.offset != (bfd_vma) -1) - { - bfd_vma value; - - if (h->plt.offset & 1) - abort (); - - /* This symbol has an entry in the procedure linkage table. Set - it up. - - The format of a plt entry is - <funcaddr> - <__gp> - */ - value = 0; - if (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak) - { - value = h->root.u.def.value; - if (h->root.u.def.section->output_section != NULL) - value += (h->root.u.def.section->output_offset - + h->root.u.def.section->output_section->vma); - } - - if (! ((struct elf32_hppa_link_hash_entry *) h)->pic_call) - { - Elf_Internal_Rela rel; - - /* Create a dynamic IPLT relocation for this entry. */ - rel.r_offset = (h->plt.offset - + hplink->splt->output_offset - + hplink->splt->output_section->vma); - if (! ((struct elf32_hppa_link_hash_entry *) h)->plt_abs - && h->dynindx != -1) - { - /* To support lazy linking, the function pointer is - initialised to point to a special stub stored at the - end of the .plt. This is not done for plt entries - with a base-relative dynamic relocation. */ - value = (hplink->splt->output_offset - + hplink->splt->output_section->vma - + hplink->splt->_raw_size - - sizeof (plt_stub) - + PLT_STUB_ENTRY); - rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_IPLT); - rel.r_addend = 0; - } - else - { - /* This symbol has been marked to become local, and is - used by a plabel so must be kept in the .plt. */ - rel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT); - rel.r_addend = value; - } - - bfd_elf32_swap_reloca_out (hplink->splt->output_section->owner, - &rel, - ((Elf32_External_Rela *) - hplink->srelplt->contents - + hplink->srelplt->reloc_count)); - hplink->srelplt->reloc_count++; - } - - bfd_put_32 (hplink->splt->owner, - value, - hplink->splt->contents + h->plt.offset); - bfd_put_32 (hplink->splt->owner, - elf_gp (hplink->splt->output_section->owner), - hplink->splt->contents + h->plt.offset + 4); - if (PLABEL_PLT_ENTRY_SIZE != PLT_ENTRY_SIZE - && ((struct elf32_hppa_link_hash_entry *) h)->plabel - && h->dynindx != -1) - { - memset (hplink->splt->contents + h->plt.offset + 8, - 0, PLABEL_PLT_ENTRY_SIZE - PLT_ENTRY_SIZE); - } - - if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) - { - /* Mark the symbol as undefined, rather than as defined in - the .plt section. Leave the value alone. */ - sym->st_shndx = SHN_UNDEF; - } - } - - if (h->got.offset != (bfd_vma) -1) - { - Elf_Internal_Rela rel; - - /* This symbol has an entry in the global offset table. Set it - up. */ - - rel.r_offset = ((h->got.offset &~ (bfd_vma) 1) - + hplink->sgot->output_offset - + hplink->sgot->output_section->vma); - - /* If this is a -Bsymbolic link and the symbol is defined - locally or was forced to be local because of a version file, - we just want to emit a RELATIVE reloc. The entry in the - global offset table will already have been initialized in the - relocate_section function. */ - if (info->shared - && (info->symbolic || h->dynindx == -1) - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) - { - rel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32); - rel.r_addend = (h->root.u.def.value - + h->root.u.def.section->output_offset - + h->root.u.def.section->output_section->vma); - } - else - { - if ((h->got.offset & 1) != 0) - abort (); - bfd_put_32 (output_bfd, (bfd_vma) 0, - hplink->sgot->contents + h->got.offset); - rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_DIR32); - rel.r_addend = 0; - } - - bfd_elf32_swap_reloca_out (output_bfd, &rel, - ((Elf32_External_Rela *) - hplink->srelgot->contents - + hplink->srelgot->reloc_count)); - ++hplink->srelgot->reloc_count; - } - - if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) - { - asection *s; - Elf_Internal_Rela rel; - - /* This symbol needs a copy reloc. Set it up. */ - - if (! (h->dynindx != -1 - && (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak))) - abort (); - - s = hplink->srelbss; - - rel.r_offset = (h->root.u.def.value - + h->root.u.def.section->output_offset - + h->root.u.def.section->output_section->vma); - rel.r_addend = 0; - rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_COPY); - bfd_elf32_swap_reloca_out (output_bfd, &rel, - ((Elf32_External_Rela *) s->contents - + s->reloc_count)); - ++s->reloc_count; - } - - /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ - if (h->root.root.string[0] == '_' - && (strcmp (h->root.root.string, "_DYNAMIC") == 0 - || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)) - { - sym->st_shndx = SHN_ABS; - } - - return true; -} - -/* Finish up the dynamic sections. */ - -static boolean -elf32_hppa_finish_dynamic_sections (output_bfd, info) - bfd *output_bfd; - struct bfd_link_info *info; -{ - bfd *dynobj; - struct elf32_hppa_link_hash_table *hplink; - asection *sdyn; - - hplink = hppa_link_hash_table (info); - dynobj = hplink->root.dynobj; - - sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); - - if (hplink->root.dynamic_sections_created) - { - Elf32_External_Dyn *dyncon, *dynconend; - - if (sdyn == NULL) - abort (); - - dyncon = (Elf32_External_Dyn *) sdyn->contents; - dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); - for (; dyncon < dynconend; dyncon++) - { - Elf_Internal_Dyn dyn; - asection *s; - - bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); - - switch (dyn.d_tag) - { - default: - break; - - case DT_PLTGOT: - /* Use PLTGOT to set the GOT register. */ - dyn.d_un.d_ptr = elf_gp (output_bfd); - bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); - break; - - case DT_JMPREL: - s = hplink->srelplt; - dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; - bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); - break; - - case DT_PLTRELSZ: - s = hplink->srelplt; - if (s->_cooked_size != 0) - dyn.d_un.d_val = s->_cooked_size; - else - dyn.d_un.d_val = s->_raw_size; - bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); - break; - } - } - } - - if (hplink->sgot != NULL && hplink->sgot->_raw_size != 0) - { - /* Fill in the first entry in the global offset table. - We use it to point to our dynamic section, if we have one. */ - bfd_put_32 (output_bfd, - (sdyn != NULL - ? sdyn->output_section->vma + sdyn->output_offset - : (bfd_vma) 0), - hplink->sgot->contents); - - /* The second entry is reserved for use by the dynamic linker. */ - memset (hplink->sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE); - - /* Set .got entry size. */ - elf_section_data (hplink->sgot->output_section) - ->this_hdr.sh_entsize = GOT_ENTRY_SIZE; - } - - if (hplink->splt != NULL && hplink->splt->_raw_size != 0) - { - /* Set plt entry size. */ - elf_section_data (hplink->splt->output_section) - ->this_hdr.sh_entsize = PLT_ENTRY_SIZE; - - if (hplink->need_plt_stub) - { - /* Set up the .plt stub. */ - memcpy (hplink->splt->contents - + hplink->splt->_raw_size - sizeof (plt_stub), - plt_stub, sizeof (plt_stub)); - - if ((hplink->splt->output_offset - + hplink->splt->output_section->vma - + hplink->splt->_raw_size) - != (hplink->sgot->output_offset - + hplink->sgot->output_section->vma)) - { - (*_bfd_error_handler) - (_(".got section not immediately after .plt section")); - return false; - } - } - } - - return true; -} - -/* Tweak the OSABI field of the elf header. */ - -static void -elf32_hppa_post_process_headers (abfd, link_info) - bfd *abfd; - struct bfd_link_info *link_info ATTRIBUTE_UNUSED; -{ - Elf_Internal_Ehdr * i_ehdrp; - - i_ehdrp = elf_elfheader (abfd); - - if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0) - { - i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX; - } - else - { - i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_HPUX; - } -} - -/* Called when writing out an object file to decide the type of a - symbol. */ -static int -elf32_hppa_elf_get_symbol_type (elf_sym, type) - Elf_Internal_Sym *elf_sym; - int type; -{ - if (ELF_ST_TYPE (elf_sym->st_info) == STT_PARISC_MILLI) - return STT_PARISC_MILLI; - else - return type; -} - -/* Misc BFD support code. */ -#define bfd_elf32_bfd_is_local_label_name elf_hppa_is_local_label_name -#define bfd_elf32_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup -#define elf_info_to_howto elf_hppa_info_to_howto -#define elf_info_to_howto_rel elf_hppa_info_to_howto_rel - -/* Stuff for the BFD linker. */ -#define bfd_elf32_bfd_final_link elf32_hppa_final_link -#define bfd_elf32_bfd_link_hash_table_create elf32_hppa_link_hash_table_create -#define elf_backend_add_symbol_hook elf32_hppa_add_symbol_hook -#define elf_backend_adjust_dynamic_symbol elf32_hppa_adjust_dynamic_symbol -#define elf_backend_check_relocs elf32_hppa_check_relocs -#define elf_backend_create_dynamic_sections elf32_hppa_create_dynamic_sections -#define elf_backend_fake_sections elf_hppa_fake_sections -#define elf_backend_relocate_section elf32_hppa_relocate_section -#define elf_backend_hide_symbol elf32_hppa_hide_symbol -#define elf_backend_finish_dynamic_symbol elf32_hppa_finish_dynamic_symbol -#define elf_backend_finish_dynamic_sections elf32_hppa_finish_dynamic_sections -#define elf_backend_size_dynamic_sections elf32_hppa_size_dynamic_sections -#define elf_backend_gc_mark_hook elf32_hppa_gc_mark_hook -#define elf_backend_gc_sweep_hook elf32_hppa_gc_sweep_hook -#define elf_backend_object_p elf32_hppa_object_p -#define elf_backend_final_write_processing elf_hppa_final_write_processing -#define elf_backend_post_process_headers elf32_hppa_post_process_headers -#define elf_backend_get_symbol_type elf32_hppa_elf_get_symbol_type - -#define elf_backend_can_gc_sections 1 -#define elf_backend_plt_alignment 2 -#define elf_backend_want_got_plt 0 -#define elf_backend_plt_readonly 0 -#define elf_backend_want_plt_sym 0 -#define elf_backend_got_header_size 8 - -#define TARGET_BIG_SYM bfd_elf32_hppa_vec -#define TARGET_BIG_NAME "elf32-hppa" -#define ELF_ARCH bfd_arch_hppa -#define ELF_MACHINE_CODE EM_PARISC -#define ELF_MAXPAGESIZE 0x1000 - -#include "elf32-target.h" - -#undef TARGET_BIG_SYM -#define TARGET_BIG_SYM bfd_elf32_hppa_linux_vec -#undef TARGET_BIG_NAME -#define TARGET_BIG_NAME "elf32-hppa-linux" - -#define INCLUDED_TARGET_FILE 1 -#include "elf32-target.h" |