/* IBM S/390-specific support for 64-bit ELF
- Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
- 2010, 2011, 2012 Free Software Foundation, Inc.
+ Copyright (C) 2000-2017 Free Software Foundation, Inc.
Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
This file is part of BFD, the Binary File Descriptor library.
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
-
-static reloc_howto_type *elf_s390_reloc_type_lookup
- PARAMS ((bfd *, bfd_reloc_code_real_type));
-static void elf_s390_info_to_howto
- PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
-static bfd_boolean elf_s390_is_local_label_name
- PARAMS ((bfd *, const char *));
-static struct bfd_hash_entry *link_hash_newfunc
- PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
-static struct bfd_link_hash_table *elf_s390_link_hash_table_create
- PARAMS ((bfd *));
-static bfd_boolean create_got_section
- PARAMS((bfd *, struct bfd_link_info *));
-static bfd_boolean elf_s390_create_dynamic_sections
- PARAMS((bfd *, struct bfd_link_info *));
-static void elf_s390_copy_indirect_symbol
- PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *,
- struct elf_link_hash_entry *));
-static bfd_boolean elf_s390_check_relocs
- PARAMS ((bfd *, struct bfd_link_info *, asection *,
- const Elf_Internal_Rela *));
-struct elf_s390_link_hash_entry;
-static void elf_s390_adjust_gotplt
- PARAMS ((struct elf_s390_link_hash_entry *));
-static bfd_boolean elf_s390_adjust_dynamic_symbol
- PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
-static bfd_boolean allocate_dynrelocs
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static bfd_boolean readonly_dynrelocs
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static bfd_boolean elf_s390_size_dynamic_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static bfd_boolean elf_s390_relocate_section
- PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
- Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
-static bfd_boolean elf_s390_finish_dynamic_symbol
- PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
- Elf_Internal_Sym *));
-static enum elf_reloc_type_class elf_s390_reloc_type_class
- PARAMS ((const Elf_Internal_Rela *));
-static bfd_boolean elf_s390_finish_dynamic_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static bfd_boolean elf_s390_object_p
- PARAMS ((bfd *));
-static int elf_s390_tls_transition
- PARAMS ((struct bfd_link_info *, int, int));
-static bfd_reloc_status_type s390_tls_reloc
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-static bfd_vma dtpoff_base
- PARAMS ((struct bfd_link_info *));
-static bfd_vma tpoff
- PARAMS ((struct bfd_link_info *, bfd_vma));
-static void invalid_tls_insn
- PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
-static bfd_reloc_status_type s390_elf_ldisp_reloc
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-
#include "elf/s390.h"
+#include "elf-s390.h"
+#include <stdarg.h>
/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
from smaller values. Start with zero, widen, *then* decrement. */
#define MINUS_ONE (((bfd_vma)0) - 1)
+static bfd_reloc_status_type
+s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
+ asection *, bfd *, char **);
+static bfd_reloc_status_type
+s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
+ asection *, bfd *, char **);
+
/* The relocation "howto" table. */
static reloc_howto_type elf_howto_table[] =
{
HOWTO (R_390_NONE, /* type */
0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
+ 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
0, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
+ HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
+ HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
+ HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
+ HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
+ HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
};
/* GNU extension to record C++ vtable hierarchy. */
HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
static reloc_howto_type *
-elf_s390_reloc_type_lookup (abfd, code)
- bfd *abfd ATTRIBUTE_UNUSED;
- bfd_reloc_code_real_type code;
+elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
{
switch (code)
{
return &elf_howto_table[(int) R_390_GOT16];
case BFD_RELOC_16_PCREL:
return &elf_howto_table[(int) R_390_PC16];
+ case BFD_RELOC_390_PC12DBL:
+ return &elf_howto_table[(int) R_390_PC12DBL];
+ case BFD_RELOC_390_PLT12DBL:
+ return &elf_howto_table[(int) R_390_PLT12DBL];
case BFD_RELOC_390_PC16DBL:
return &elf_howto_table[(int) R_390_PC16DBL];
case BFD_RELOC_390_PLT16DBL:
return &elf_howto_table[(int) R_390_PLT16DBL];
+ case BFD_RELOC_390_PC24DBL:
+ return &elf_howto_table[(int) R_390_PC24DBL];
+ case BFD_RELOC_390_PLT24DBL:
+ return &elf_howto_table[(int) R_390_PLT24DBL];
case BFD_RELOC_390_PC32DBL:
return &elf_howto_table[(int) R_390_PC32DBL];
case BFD_RELOC_390_PLT32DBL:
return &elf_howto_table[(int) R_390_GOTPLT20];
case BFD_RELOC_390_TLS_GOTIE20:
return &elf_howto_table[(int) R_390_TLS_GOTIE20];
+ case BFD_RELOC_390_IRELATIVE:
+ return &elf_howto_table[(int) R_390_IRELATIVE];
case BFD_RELOC_VTABLE_INHERIT:
return &elf64_s390_vtinherit_howto;
case BFD_RELOC_VTABLE_ENTRY:
&& strcasecmp (elf_howto_table[i].name, r_name) == 0)
return &elf_howto_table[i];
- if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
- return &elf64_s390_vtinherit_howto;
- if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
- return &elf64_s390_vtentry_howto;
+ if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
+ return &elf64_s390_vtinherit_howto;
+ if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
+ return &elf64_s390_vtentry_howto;
return NULL;
}
and elf64-s390.c has its own copy. */
static void
-elf_s390_info_to_howto (abfd, cache_ptr, dst)
- bfd *abfd ATTRIBUTE_UNUSED;
- arelent *cache_ptr;
- Elf_Internal_Rela *dst;
+elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
+ arelent *cache_ptr,
+ Elf_Internal_Rela *dst)
{
unsigned int r_type = ELF64_R_TYPE(dst->r_info);
switch (r_type)
default:
if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
{
- (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
- abfd, (int) r_type);
+ /* xgettext:c-format */
+ _bfd_error_handler (_("%B: invalid relocation type %d"),
+ abfd, (int) r_type);
r_type = R_390_NONE;
}
cache_ptr->howto = &elf_howto_table[r_type];
/* A relocation function which doesn't do anything. */
static bfd_reloc_status_type
-s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
- output_bfd, error_message)
- bfd *abfd ATTRIBUTE_UNUSED;
- arelent *reloc_entry;
- asymbol *symbol ATTRIBUTE_UNUSED;
- PTR data ATTRIBUTE_UNUSED;
- asection *input_section;
- bfd *output_bfd;
- char **error_message ATTRIBUTE_UNUSED;
+s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
+ arelent *reloc_entry,
+ asymbol *symbol ATTRIBUTE_UNUSED,
+ void * data ATTRIBUTE_UNUSED,
+ asection *input_section,
+ bfd *output_bfd,
+ char **error_message ATTRIBUTE_UNUSED)
{
if (output_bfd)
reloc_entry->address += input_section->output_offset;
/* Handle the large displacement relocs. */
static bfd_reloc_status_type
-s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
- output_bfd, error_message)
- bfd *abfd;
- arelent *reloc_entry;
- asymbol *symbol;
- PTR data;
- asection *input_section;
- bfd *output_bfd;
- char **error_message ATTRIBUTE_UNUSED;
+s390_elf_ldisp_reloc (bfd *abfd,
+ arelent *reloc_entry,
+ asymbol *symbol,
+ void * data,
+ asection *input_section,
+ bfd *output_bfd,
+ char **error_message ATTRIBUTE_UNUSED)
{
reloc_howto_type *howto = reloc_entry->howto;
bfd_vma relocation;
relocation -= reloc_entry->address;
}
- insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
+ insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
}
static bfd_boolean
-elf_s390_is_local_label_name (abfd, name)
- bfd *abfd;
- const char *name;
+elf_s390_is_local_label_name (bfd *abfd, const char *name)
{
if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
return TRUE;
/* The name of the dynamic interpreter. This is put in the .interp
section. */
-#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
+#define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
copying dynamic variables from a shared lib into an app's dynbss
#define GOT_ENTRY_SIZE 8
+#define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
+
/* The first three entries in a procedure linkage table are reserved,
and the initial contents are unimportant (we zero them out).
Subsequent entries look like this. See the SVR4 ABI 386
The GOT holds the address in the PLT to be executed.
The loader then gets:
- 24(15) = Pointer to the structure describing the object.
- 28(15) = Offset in symbol table
+ 48(15) = Pointer to the structure describing the object.
+ 56(15) = Offset in symbol table
The loader must then find the module where the function is
and insert the address in the GOT.
RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
BRCL 15,-x # 6 bytes Jump to start of PLT
- .long ? # 4 bytes offset into symbol table
+ .long ? # 4 bytes offset into .rela.plt
Total = 32 bytes per PLT entry
Fixup at offset 2: relative address to GOT entry
Fixup at offset 22: relative branch to PLT0
- Fixup at offset 28: 32 bit offset into symbol table
+ Fixup at offset 28: 32 bit offset into .rela.plt
- A 32 bit offset into the symbol table is enough. It allows for symbol
- tables up to a size of 2 gigabyte. A single dynamic object (the main
- program, any shared library) is limited to 4GB in size and I want to see
- the program that manages to have a symbol table of more than 2 GB with a
- total size of at max 4 GB. */
+ A 32 bit offset into the symbol table is enough. It allows for
+ .rela.plt sections up to a size of 2 gigabyte. A single dynamic
+ object (the main program, any shared library) is limited to 4GB in
+ size. Having a .rela.plt of 2GB would already make the .plt
+ section bigger than 8GB. */
static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
{
};
/* The first PLT entry pushes the offset into the symbol table
- from R1 onto the stack at 8(15) and the loader object info
- at 12(15), loads the loader address in R1 and jumps to it. */
+ from R1 onto the stack at 56(15) and the loader object info
+ at 48(15), loads the loader address in R1 and jumps to it. */
/* The first entry in the PLT:
#define GOT_TLS_IE 3
#define GOT_TLS_IE_NLT 3
unsigned char tls_type;
+
+ /* For pointer equality reasons we might need to change the symbol
+ type from STT_GNU_IFUNC to STT_FUNC together with its value and
+ section entry. So after alloc_dynrelocs only these values should
+ be used. In order to check whether a symbol is IFUNC use
+ s390_is_ifunc_symbol_p. */
+ bfd_vma ifunc_resolver_address;
+ asection *ifunc_resolver_section;
};
#define elf_s390_hash_entry(ent) \
((struct elf_s390_link_hash_entry *)(ent))
+/* This structure represents an entry in the local PLT list needed for
+ local IFUNC symbols. */
+struct plt_entry
+{
+ /* The section of the local symbol.
+ Set in relocate_section and used in finish_dynamic_sections. */
+ asection *sec;
+
+ union
+ {
+ bfd_signed_vma refcount;
+ bfd_vma offset;
+ } plt;
+};
+
/* NOTE: Keep this structure in sync with
the one declared in elf32-s390.c. */
struct elf_s390_obj_tdata
{
struct elf_obj_tdata root;
+ /* A local PLT is needed for ifunc symbols. */
+ struct plt_entry *local_plt;
+
/* TLS type for each local got entry. */
char *local_got_tls_type;
};
#define elf_s390_tdata(abfd) \
((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
+#define elf_s390_local_plt(abfd) \
+ (elf_s390_tdata (abfd)->local_plt)
+
#define elf_s390_local_got_tls_type(abfd) \
(elf_s390_tdata (abfd)->local_got_tls_type)
}
static bfd_boolean
-elf_s390_object_p (abfd)
- bfd *abfd;
+elf_s390_object_p (bfd *abfd)
{
/* Set the right machine number for an s390 elf32 file. */
return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
struct elf_link_hash_table elf;
/* Short-cuts to get to dynamic linker sections. */
- asection *sdynbss;
- asection *srelbss;
+ asection *irelifunc;
union {
bfd_signed_vma refcount;
/* Small local sym cache. */
struct sym_cache sym_cache;
+
+ /* Options passed from the linker. */
+ struct s390_elf_params *params;
};
/* Get the s390 ELF linker hash table from a link_info structure. */
-#define elf_s390_hash_table(p) \
- (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
- == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
+#define elf_s390_hash_table(p) \
+ (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
+ == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
+
+#define ELF64 1
+#include "elf-s390-common.c"
/* Create an entry in an s390 ELF linker hash table. */
static struct bfd_hash_entry *
-link_hash_newfunc (entry, table, string)
- struct bfd_hash_entry *entry;
- struct bfd_hash_table *table;
- const char *string;
+link_hash_newfunc (struct bfd_hash_entry *entry,
+ struct bfd_hash_table *table,
+ const char *string)
{
/* Allocate the structure if it has not already been allocated by a
subclass. */
eh->dyn_relocs = NULL;
eh->gotplt_refcount = 0;
eh->tls_type = GOT_UNKNOWN;
+ eh->ifunc_resolver_address = 0;
+ eh->ifunc_resolver_section = NULL;
}
return entry;
/* Create an s390 ELF linker hash table. */
static struct bfd_link_hash_table *
-elf_s390_link_hash_table_create (abfd)
- bfd *abfd;
+elf_s390_link_hash_table_create (bfd *abfd)
{
struct elf_s390_link_hash_table *ret;
bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
- ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
+ ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
if (ret == NULL)
return NULL;
return NULL;
}
- ret->elf.sgot = NULL;
- ret->elf.sgotplt = NULL;
- ret->elf.srelgot = NULL;
- ret->elf.splt = NULL;
- ret->elf.srelplt = NULL;
- ret->sdynbss = NULL;
- ret->srelbss = NULL;
- ret->tls_ldm_got.refcount = 0;
- ret->sym_cache.abfd = NULL;
-
return &ret->elf.root;
}
-/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
- shortcuts to them in our hash table. */
-
-static bfd_boolean
-create_got_section (bfd *dynobj,
- struct bfd_link_info *info)
-{
- struct elf_s390_link_hash_table *htab;
-
- if (! _bfd_elf_create_got_section (dynobj, info))
- return FALSE;
-
- htab = elf_s390_hash_table (info);
- if (htab == NULL)
- return FALSE;
-
- htab->elf.sgot = bfd_get_section_by_name (dynobj, ".got");
- htab->elf.sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
- htab->elf.srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
- if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
- abort ();
- return TRUE;
-}
-
-/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
- .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
- hash table. */
-
-static bfd_boolean
-elf_s390_create_dynamic_sections (bfd *dynobj,
- struct bfd_link_info *info)
-{
- struct elf_s390_link_hash_table *htab;
-
- htab = elf_s390_hash_table (info);
- if (htab == NULL)
- return FALSE;
-
- if (!htab->elf.sgot && !create_got_section (dynobj, info))
- return FALSE;
-
- if (!_bfd_elf_create_dynamic_sections (dynobj, info))
- return FALSE;
-
- htab->elf.splt = bfd_get_section_by_name (dynobj, ".plt");
- htab->elf.srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
- htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
- if (!info->shared)
- htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
-
- if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
- || (!info->shared && !htab->srelbss))
- abort ();
-
- return TRUE;
-}
-
/* Copy the extra info we tack onto an elf_link_hash_entry. */
static void
-elf_s390_copy_indirect_symbol (info, dir, ind)
- struct bfd_link_info *info;
- struct elf_link_hash_entry *dir, *ind;
+elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
+ struct elf_link_hash_entry *dir,
+ struct elf_link_hash_entry *ind)
{
struct elf_s390_link_hash_entry *edir, *eind;
/* If called to transfer flags for a weakdef during processing
of elf_adjust_dynamic_symbol, don't copy non_got_ref.
We clear it ourselves for ELIMINATE_COPY_RELOCS. */
- dir->ref_dynamic |= ind->ref_dynamic;
+ if (dir->versioned != versioned_hidden)
+ dir->ref_dynamic |= ind->ref_dynamic;
dir->ref_regular |= ind->ref_regular;
dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
dir->needs_plt |= ind->needs_plt;
}
static int
-elf_s390_tls_transition (info, r_type, is_local)
- struct bfd_link_info *info;
- int r_type;
- int is_local;
+elf_s390_tls_transition (struct bfd_link_info *info,
+ int r_type,
+ int is_local)
{
- if (info->shared)
+ if (bfd_link_pic (info))
return r_type;
switch (r_type)
bfd_signed_vma *local_got_refcounts;
int tls_type, old_tls_type;
- if (info->relocatable)
+ if (bfd_link_relocatable (info))
return TRUE;
BFD_ASSERT (is_s390_elf (abfd));
unsigned int r_type;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
+ Elf_Internal_Sym *isym;
r_symndx = ELF64_R_SYM (rel->r_info);
if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
{
- (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
- abfd,
- r_symndx);
+ /* xgettext:c-format */
+ _bfd_error_handler (_("%B: bad symbol index: %d"),
+ abfd, r_symndx);
return FALSE;
}
if (r_symndx < symtab_hdr->sh_info)
- h = NULL;
+ {
+ /* A local symbol. */
+ isym = bfd_sym_from_r_symndx (&htab->sym_cache,
+ abfd, r_symndx);
+ if (isym == NULL)
+ return FALSE;
+
+ if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
+ {
+ struct plt_entry *plt;
+
+ if (htab->elf.dynobj == NULL)
+ htab->elf.dynobj = abfd;
+
+ if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
+ return FALSE;
+
+ if (local_got_refcounts == NULL)
+ {
+ if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
+ return FALSE;
+ local_got_refcounts = elf_local_got_refcounts (abfd);
+ }
+ plt = elf_s390_local_plt (abfd);
+ plt[r_symndx].plt.refcount++;
+ }
+ h = NULL;
+ }
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ /* PR15323, ref flags aren't set for references in the same
+ object. */
+ h->root.non_ir_ref_regular = 1;
}
/* Create got section and local_got_refcounts array if they
if (h == NULL
&& local_got_refcounts == NULL)
{
- bfd_size_type size;
-
- size = symtab_hdr->sh_info;
- size *= (sizeof (bfd_signed_vma) + sizeof(char));
- local_got_refcounts = ((bfd_signed_vma *)
- bfd_zalloc (abfd, size));
- if (local_got_refcounts == NULL)
+ if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
return FALSE;
- elf_local_got_refcounts (abfd) = local_got_refcounts;
- elf_s390_local_got_tls_type (abfd)
- = (char *) (local_got_refcounts + symtab_hdr->sh_info);
+ local_got_refcounts = elf_local_got_refcounts (abfd);
}
+
/* Fall through. */
case R_390_GOTOFF16:
case R_390_GOTOFF32:
{
if (htab->elf.dynobj == NULL)
htab->elf.dynobj = abfd;
- if (!create_got_section (htab->elf.dynobj, info))
+ if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
return FALSE;
}
}
+ if (h != NULL)
+ {
+ if (htab->elf.dynobj == NULL)
+ htab->elf.dynobj = abfd;
+ if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
+ return FALSE;
+
+ /* Make sure an IFUNC symbol defined in a non-shared object
+ always gets a PLT slot. */
+ if (s390_is_ifunc_symbol_p (h) && h->def_regular)
+ {
+ /* The symbol is called by the dynamic loader in order
+ to resolve the relocation. So it is in fact also
+ referenced. */
+ h->ref_regular = 1;
+ h->needs_plt = 1;
+ }
+ }
+
switch (r_type)
{
- case R_390_GOTOFF16:
- case R_390_GOTOFF32:
- case R_390_GOTOFF64:
case R_390_GOTPC:
case R_390_GOTPCDBL:
- /* Got is created, nothing to be done. */
+ /* These relocs do not need a GOT slot. They just load the
+ GOT pointer itself or address something else relative to
+ the GOT. Since the GOT pointer has been set up above we
+ are done. */
break;
+ case R_390_GOTOFF16:
+ case R_390_GOTOFF32:
+ case R_390_GOTOFF64:
+ if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
+ break;
+ /* Fall through. */
+ case R_390_PLT12DBL:
case R_390_PLT16DBL:
+ case R_390_PLT24DBL:
case R_390_PLT32:
case R_390_PLT32DBL:
case R_390_PLT64:
case R_390_TLS_GOTIE20:
case R_390_TLS_GOTIE64:
case R_390_TLS_IEENT:
- if (info->shared)
+ if (bfd_link_pic (info))
info->flags |= DF_STATIC_TLS;
/* Fall through */
{
if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
{
- (*_bfd_error_handler)
+ _bfd_error_handler
+ /* xgettext:c-format */
(_("%B: `%s' accessed both as normal and thread local symbol"),
abfd, h->root.root.string);
return FALSE;
/* Fall through */
case R_390_TLS_LE64:
- if (!info->shared)
+ /* For static linking and executables this reloc will be
+ calculated at linktime otherwise a TLS_TPOFF runtime
+ reloc will be generated. */
+ if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
+ break;
+
+ if (!bfd_link_pic (info))
break;
info->flags |= DF_STATIC_TLS;
/* Fall through */
case R_390_16:
case R_390_32:
case R_390_64:
+ case R_390_PC12DBL:
case R_390_PC16:
case R_390_PC16DBL:
+ case R_390_PC24DBL:
case R_390_PC32:
case R_390_PC32DBL:
case R_390_PC64:
- if (h != NULL && !info->shared)
+ if (h != NULL && bfd_link_executable (info))
{
/* If this reloc is in a read-only section, we might
need a copy reloc. We can't check reliably at this
adjust_dynamic_symbol. */
h->non_got_ref = 1;
- /* We may need a .plt entry if the function this reloc
- refers to is in a shared lib. */
- h->plt.refcount += 1;
+ if (!bfd_link_pic (info))
+ {
+ /* We may need a .plt entry if the function this reloc
+ refers to is in a shared lib. */
+ h->plt.refcount += 1;
+ }
}
/* If we are creating a shared library, and this is a reloc
may need to keep relocations for symbols satisfied by a
dynamic library if we manage to avoid copy relocs for the
symbol. */
- if ((info->shared
+ if ((bfd_link_pic (info)
&& (sec->flags & SEC_ALLOC) != 0
&& ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
+ && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
&& ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
+ && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
&& ELF64_R_TYPE (rel->r_info) != R_390_PC32
&& ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
&& ELF64_R_TYPE (rel->r_info) != R_390_PC64)
|| h->root.type == bfd_link_hash_defweak
|| !h->def_regular))))
|| (ELIMINATE_COPY_RELOCS
- && !info->shared
+ && !bfd_link_pic (info)
&& (sec->flags & SEC_ALLOC) != 0
&& h != NULL
&& (h->root.type == bfd_link_hash_defweak
easily. Oh well. */
asection *s;
void *vpp;
- Elf_Internal_Sym *isym;
isym = bfd_sym_from_r_symndx (&htab->sym_cache,
abfd, r_symndx);
p->count += 1;
if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
+ || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
+ || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
|| ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
|| ELF64_R_TYPE (rel->r_info) == R_390_PC32
|| ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
bfd_signed_vma *local_got_refcounts;
const Elf_Internal_Rela *rel, *relend;
- if (info->relocatable)
+ if (bfd_link_relocatable (info))
return TRUE;
htab = elf_s390_hash_table (info);
break;
}
}
+ else
+ {
+ Elf_Internal_Sym *isym;
+
+ /* A local symbol. */
+ isym = bfd_sym_from_r_symndx (&htab->sym_cache,
+ abfd, r_symndx);
+ if (isym == NULL)
+ return FALSE;
+
+ if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
+ {
+ struct plt_entry *plt = elf_s390_local_plt (abfd);
+ if (plt[r_symndx].plt.refcount > 0)
+ plt[r_symndx].plt.refcount--;
+ }
+ }
r_type = ELF64_R_TYPE (rel->r_info);
r_type = elf_s390_tls_transition (info, r_type, h != NULL);
if (htab->tls_ldm_got.refcount > 0)
htab->tls_ldm_got.refcount -= 1;
break;
+ case R_390_GOTOFF16:
+ case R_390_GOTOFF32:
+ case R_390_GOTOFF64:
+ if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular)
+ {
+ h->plt.refcount--;
+ break;
+ }
+
+ case R_390_GOTPC:
+ case R_390_GOTPCDBL:
+ break;
case R_390_TLS_GD64:
case R_390_TLS_IE64:
case R_390_GOT20:
case R_390_GOT32:
case R_390_GOT64:
- case R_390_GOTOFF16:
- case R_390_GOTOFF32:
- case R_390_GOTOFF64:
- case R_390_GOTPC:
- case R_390_GOTPCDBL:
case R_390_GOTENT:
if (h != NULL)
{
case R_390_32:
case R_390_64:
case R_390_PC16:
+ case R_390_PC12DBL:
case R_390_PC16DBL:
+ case R_390_PC24DBL:
case R_390_PC32:
case R_390_PC32DBL:
case R_390_PC64:
- if (info->shared)
+ if (bfd_link_pic (info))
break;
/* Fall through */
+ case R_390_PLT12DBL:
case R_390_PLT16DBL:
+ case R_390_PLT24DBL:
case R_390_PLT32:
case R_390_PLT32DBL:
case R_390_PLT64:
created (we're only linking static objects). */
static void
-elf_s390_adjust_gotplt (h)
- struct elf_s390_link_hash_entry *h;
+elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
{
if (h->elf.root.type == bfd_link_hash_warning)
h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
struct elf_link_hash_entry *h)
{
struct elf_s390_link_hash_table *htab;
- asection *s;
+ asection *s, *srel;
+
+ /* STT_GNU_IFUNC symbol must go through PLT. */
+ if (s390_is_ifunc_symbol_p (h))
+ {
+ /* All local STT_GNU_IFUNC references must be treated as local
+ calls via local PLT. */
+ if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
+ {
+ bfd_size_type pc_count = 0, count = 0;
+ struct elf_dyn_relocs **pp;
+ struct elf_s390_link_hash_entry *eh;
+ struct elf_dyn_relocs *p;
+
+ eh = (struct elf_s390_link_hash_entry *) h;
+ for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
+ {
+ pc_count += p->pc_count;
+ p->count -= p->pc_count;
+ p->pc_count = 0;
+ count += p->count;
+ if (p->count == 0)
+ *pp = p->next;
+ else
+ pp = &p->next;
+ }
+
+ if (pc_count || count)
+ {
+ h->needs_plt = 1;
+ h->non_got_ref = 1;
+ if (h->plt.refcount <= 0)
+ h->plt.refcount = 1;
+ else
+ h->plt.refcount += 1;
+ }
+ }
+
+ if (h->plt.refcount <= 0)
+ {
+ h->plt.offset = (bfd_vma) -1;
+ h->needs_plt = 0;
+ }
+ return TRUE;
+ }
/* If this is a function, put it in the procedure linkage table. We
will fill in the contents of the procedure linkage table later
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)
+ if (bfd_link_pic (info))
return TRUE;
/* If there are no references to this symbol that do not use the
/* We must generate a R_390_COPY reloc to tell the dynamic linker to
copy the initial value out of the dynamic object and into the
runtime process image. */
+ if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
+ {
+ s = htab->elf.sdynrelro;
+ srel = htab->elf.sreldynrelro;
+ }
+ else
+ {
+ s = htab->elf.sdynbss;
+ srel = htab->elf.srelbss;
+ }
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
{
- htab->srelbss->size += sizeof (Elf64_External_Rela);
+ srel->size += sizeof (Elf64_External_Rela);
h->needs_copy = 1;
}
- s = htab->sdynbss;
-
- return _bfd_elf_adjust_dynamic_copy (h, s);
+ return _bfd_elf_adjust_dynamic_copy (info, h, s);
}
/* Allocate space in .plt, .got and associated reloc sections for
{
struct bfd_link_info *info;
struct elf_s390_link_hash_table *htab;
- struct elf_s390_link_hash_entry *eh;
+ struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
struct elf_dyn_relocs *p;
if (h->root.type == bfd_link_hash_indirect)
if (htab == NULL)
return FALSE;
- if (htab->elf.dynamic_sections_created
- && h->plt.refcount > 0)
+ /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
+ here if it is defined and referenced in a non-shared object. */
+ if (s390_is_ifunc_symbol_p (h) && h->def_regular)
+ return s390_elf_allocate_ifunc_dyn_relocs (info, h);
+ else if (htab->elf.dynamic_sections_created
+ && h->plt.refcount > 0)
{
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic. */
return FALSE;
}
- if (info->shared
+ if (bfd_link_pic (info)
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
{
asection *s = htab->elf.splt;
location in the .plt. This is required to make function
pointers compare as equal between the normal executable and
the shared library. */
- if (! info->shared
+ if (! bfd_link_pic (info)
&& !h->def_regular)
{
h->root.u.def.section = s;
to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
we can save the dynamic TLS relocation. */
if (h->got.refcount > 0
- && !info->shared
+ && !bfd_link_pic (info)
&& h->dynindx == -1
&& elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
{
htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| h->root.type != bfd_link_hash_undefweak)
- && (info->shared
+ && (bfd_link_pic (info)
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
}
else
h->got.offset = (bfd_vma) -1;
- eh = (struct elf_s390_link_hash_entry *) h;
if (eh->dyn_relocs == NULL)
return TRUE;
space for pc-relative relocs that have become local due to symbol
visibility changes. */
- if (info->shared)
+ if (bfd_link_pic (info))
{
if (SYMBOL_CALLS_LOCAL (info, h))
{
/* Find any dynamic relocs that apply to read-only sections. */
static bfd_boolean
-readonly_dynrelocs (h, inf)
- struct elf_link_hash_entry *h;
- PTR inf;
+readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
{
struct elf_s390_link_hash_entry *eh;
struct elf_dyn_relocs *p;
if (htab->elf.dynamic_sections_created)
{
/* Set the contents of the .interp section to the interpreter. */
- if (info->executable)
+ if (bfd_link_executable (info) && !info->nointerp)
{
- s = bfd_get_section_by_name (dynobj, ".interp");
+ s = bfd_get_linker_section (dynobj, ".interp");
if (s == NULL)
abort ();
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
/* Set up .got offsets for local syms, and space for local dynamic
relocs. */
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
+ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
{
bfd_signed_vma *local_got;
bfd_signed_vma *end_local_got;
bfd_size_type locsymcount;
Elf_Internal_Shdr *symtab_hdr;
asection *srela;
+ struct plt_entry *local_plt;
+ unsigned int i;
if (! is_s390_elf (ibfd))
continue;
s->size += GOT_ENTRY_SIZE;
if (*local_tls_type == GOT_TLS_GD)
s->size += GOT_ENTRY_SIZE;
- if (info->shared)
+ if (bfd_link_pic (info))
srela->size += sizeof (Elf64_External_Rela);
}
else
*local_got = (bfd_vma) -1;
}
+
+ local_plt = elf_s390_local_plt (ibfd);
+ for (i = 0; i < symtab_hdr->sh_info; i++)
+ {
+ if (local_plt[i].plt.refcount > 0)
+ {
+ local_plt[i].plt.offset = htab->elf.iplt->size;
+ htab->elf.iplt->size += PLT_ENTRY_SIZE;
+ htab->elf.igotplt->size += GOT_ENTRY_SIZE;
+ htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
+ }
+ else
+ local_plt[i].plt.offset = (bfd_vma) -1;
+ }
}
if (htab->tls_ldm_got.refcount > 0)
/* Allocate global sym .plt and .got entries, and space for global
sym dynamic relocs. */
- elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
+ elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
/* We now have determined the sizes of the various dynamic sections.
Allocate memory for them. */
if (s == htab->elf.splt
|| s == htab->elf.sgot
|| s == htab->elf.sgotplt
- || s == htab->sdynbss)
+ || s == htab->elf.sdynbss
+ || s == htab->elf.sdynrelro
+ || s == htab->elf.iplt
+ || s == htab->elf.igotplt
+ || s == htab->irelifunc)
{
/* Strip this section if we don't need it; see the
comment below. */
#define add_dynamic_entry(TAG, VAL) \
_bfd_elf_add_dynamic_entry (info, TAG, VAL)
- if (info->executable)
+ if (bfd_link_executable (info))
{
if (!add_dynamic_entry (DT_DEBUG, 0))
return FALSE;
then we need a DT_TEXTREL entry. */
if ((info->flags & DF_TEXTREL) == 0)
elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
- (PTR) info);
+ info);
if ((info->flags & DF_TEXTREL) != 0)
{
This is PT_TLS segment p_vaddr. */
static bfd_vma
-dtpoff_base (info)
- struct bfd_link_info *info;
+dtpoff_base (struct bfd_link_info *info)
{
/* If tls_sec is NULL, we should have signalled an error already. */
if (elf_hash_table (info)->tls_sec == NULL)
if STT_TLS virtual address is ADDRESS. */
static bfd_vma
-tpoff (info, address)
- struct bfd_link_info *info;
- bfd_vma address;
+tpoff (struct bfd_link_info *info, bfd_vma address)
{
struct elf_link_hash_table *htab = elf_hash_table (info);
instruction. */
static void
-invalid_tls_insn (input_bfd, input_section, rel)
- bfd *input_bfd;
- asection *input_section;
- Elf_Internal_Rela *rel;
+invalid_tls_insn (bfd *input_bfd,
+ asection *input_section,
+ Elf_Internal_Rela *rel)
{
reloc_howto_type *howto;
howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
- (*_bfd_error_handler)
+ _bfd_error_handler
+ /* xgettext:c-format */
(_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
input_bfd,
input_section,
bfd_boolean unresolved_reloc;
bfd_reloc_status_type r;
int tls_type;
+ asection *base_got = htab->elf.sgot;
r_type = ELF64_R_TYPE (rel->r_info);
if (r_type == (int) R_390_GNU_VTINHERIT
{
sym = local_syms + r_symndx;
sec = local_sections[r_symndx];
- relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
+
+ if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
+ {
+ struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
+ if (local_plt == NULL)
+ return FALSE;
+
+ /* Address of the PLT slot. */
+ relocation = (htab->elf.iplt->output_section->vma
+ + htab->elf.iplt->output_offset
+ + local_plt[r_symndx].plt.offset);
+
+ switch (r_type)
+ {
+ case R_390_PLTOFF16:
+ case R_390_PLTOFF32:
+ case R_390_PLTOFF64:
+ relocation -= htab->elf.sgot->output_section->vma;
+ break;
+ case R_390_GOTPLT12:
+ case R_390_GOTPLT16:
+ case R_390_GOTPLT20:
+ case R_390_GOTPLT32:
+ case R_390_GOTPLT64:
+ case R_390_GOTPLTENT:
+ case R_390_GOT12:
+ case R_390_GOT16:
+ case R_390_GOT20:
+ case R_390_GOT32:
+ case R_390_GOT64:
+ case R_390_GOTENT:
+ {
+ /* Write the PLT slot address into the GOT slot. */
+ bfd_put_64 (output_bfd, relocation,
+ htab->elf.sgot->contents +
+ local_got_offsets[r_symndx]);
+ relocation = (local_got_offsets[r_symndx] +
+ htab->elf.sgot->output_offset);
+
+ if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
+ relocation += htab->elf.sgot->output_section->vma;
+ break;
+ }
+ default:
+ break;
+ }
+ /* The output section is needed later in
+ finish_dynamic_section when creating the dynamic
+ relocation. */
+ local_plt[r_symndx].sec = sec;
+ goto do_relocation;
+ }
+ else
+ relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
}
else
{
bfd_boolean warned ATTRIBUTE_UNUSED;
+ bfd_boolean ignored ATTRIBUTE_UNUSED;
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
r_symndx, symtab_hdr, sym_hashes,
h, sec, relocation,
- unresolved_reloc, warned);
+ unresolved_reloc, warned, ignored);
}
- if (sec != NULL && elf_discarded_section (sec))
+ if (sec != NULL && discarded_section (sec))
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
- rel, relend, howto, contents);
+ rel, 1, relend, howto, 0, contents);
- if (info->relocatable)
+ if (bfd_link_relocatable (info))
continue;
switch (r_type)
{
bfd_vma plt_index;
- /* Calc. index no.
- Current offset - size first entry / entry size. */
- plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
- PLT_ENTRY_SIZE;
-
- /* Offset in GOT is PLT index plus GOT headers(3) times 4,
- addr & GOT addr. */
- relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
+ if (s390_is_ifunc_symbol_p (h))
+ {
+ plt_index = h->plt.offset / PLT_ENTRY_SIZE;
+ relocation = (plt_index * GOT_ENTRY_SIZE +
+ htab->elf.igotplt->output_offset);
+ if (r_type == R_390_GOTPLTENT)
+ relocation += htab->elf.igotplt->output_section->vma;
+ }
+ else
+ {
+ /* Calc. index no.
+ Current offset - size first entry / entry size. */
+ plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
+ PLT_ENTRY_SIZE;
+
+ /* Offset in GOT is PLT index plus GOT headers(3)
+ times 8, addr & GOT addr. */
+ relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
+ if (r_type == R_390_GOTPLTENT)
+ relocation += htab->elf.sgot->output_section->vma;
+ }
unresolved_reloc = FALSE;
-
- if (r_type == R_390_GOTPLTENT)
- relocation += htab->elf.sgot->output_section->vma;
break;
}
/* Fall through. */
case R_390_GOTENT:
/* Relocation is to the entry for this symbol in the global
offset table. */
- if (htab->elf.sgot == NULL)
+ if (base_got == NULL)
abort ();
if (h != NULL)
off = h->got.offset;
dyn = htab->elf.dynamic_sections_created;
- if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
- || (info->shared
- && SYMBOL_REFERENCES_LOCAL (info, h))
- || (ELF_ST_VISIBILITY (h->other)
- && h->root.type == bfd_link_hash_undefweak))
+
+ if (s390_is_ifunc_symbol_p (h))
+ {
+ BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
+ if (off == (bfd_vma)-1)
+ {
+ /* No explicit GOT usage so redirect to the
+ got.iplt slot. */
+ base_got = htab->elf.igotplt;
+ off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
+ }
+ else
+ {
+ /* Explicit GOT slots must contain the address
+ of the PLT slot. This will be handled in
+ finish_dynamic_symbol. */
+ }
+ }
+ else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
+ bfd_link_pic (info),
+ h)
+ || (bfd_link_pic (info)
+ && SYMBOL_REFERENCES_LOCAL (info, h))
+ || (ELF_ST_VISIBILITY (h->other)
+ && h->root.type == bfd_link_hash_undefweak))
{
/* This is actually a static link, or it is a
-Bsymbolic link and the symbol is defined
else
{
bfd_put_64 (output_bfd, relocation,
- htab->elf.sgot->contents + off);
+ base_got->contents + off);
h->got.offset |= 1;
}
+
+ if ((h->def_regular
+ && bfd_link_pic (info)
+ && SYMBOL_REFERENCES_LOCAL (info, h))
+ /* lgrl rx,sym@GOTENT -> larl rx, sym */
+ && ((r_type == R_390_GOTENT
+ && (bfd_get_16 (input_bfd,
+ contents + rel->r_offset - 2)
+ & 0xff0f) == 0xc408)
+ /* lg rx, sym@GOT(r12) -> larl rx, sym */
+ || (r_type == R_390_GOT20
+ && (bfd_get_32 (input_bfd,
+ contents + rel->r_offset - 2)
+ & 0xff00f000) == 0xe300c000
+ && bfd_get_8 (input_bfd,
+ contents + rel->r_offset + 3) == 0x04)))
+
+ {
+ unsigned short new_insn =
+ (0xc000 | (bfd_get_8 (input_bfd,
+ contents + rel->r_offset - 1) & 0xf0));
+ bfd_put_16 (output_bfd, new_insn,
+ contents + rel->r_offset - 2);
+ r_type = R_390_PC32DBL;
+ rel->r_addend = 2;
+ howto = elf_howto_table + r_type;
+ relocation = h->root.u.def.value
+ + h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset;
+ goto do_relocation;
+ }
}
else
unresolved_reloc = FALSE;
bfd_put_64 (output_bfd, relocation,
htab->elf.sgot->contents + off);
- if (info->shared)
+ if (bfd_link_pic (info))
{
asection *s;
Elf_Internal_Rela outrel;
if (off >= (bfd_vma) -2)
abort ();
- relocation = htab->elf.sgot->output_offset + off;
+ relocation = base_got->output_offset + off;
/* For @GOTENT the relocation is against the offset between
the instruction and the symbols entry in the GOT and not
add the vma of the GOT to get the correct value. */
if ( r_type == R_390_GOTENT
|| r_type == R_390_GOTPLTENT)
- relocation += htab->elf.sgot->output_section->vma;
+ relocation += base_got->output_section->vma;
break;
/* Relocation is relative to the start of the global offset
table. */
+ if (h != NULL
+ && s390_is_ifunc_symbol_p (h)
+ && h->def_regular
+ && !bfd_link_executable (info))
+ {
+ relocation = (htab->elf.iplt->output_section->vma
+ + htab->elf.iplt->output_offset
+ + h->plt.offset
+ - htab->elf.sgot->output_section->vma);
+ goto do_relocation;
+ }
+
/* Note that sgot->output_offset is not involved in this
calculation. We always want the start of .got. If we
defined _GLOBAL_OFFSET_TABLE in a different way, as is
unresolved_reloc = FALSE;
break;
+ case R_390_PLT12DBL:
case R_390_PLT16DBL:
+ case R_390_PLT24DBL:
case R_390_PLT32:
case R_390_PLT32DBL:
case R_390_PLT64:
break;
if (h->plt.offset == (bfd_vma) -1
- || htab->elf.splt == NULL)
+ || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
{
/* We didn't make a PLT entry for this symbol. This
happens when statically linking PIC code, or when
using -Bsymbolic. */
break;
}
-
- relocation = (htab->elf.splt->output_section->vma
- + htab->elf.splt->output_offset
- + h->plt.offset);
+ if (s390_is_ifunc_symbol_p (h))
+ relocation = (htab->elf.iplt->output_section->vma
+ + htab->elf.iplt->output_offset
+ + h->plt.offset);
+ else
+ relocation = (htab->elf.splt->output_section->vma
+ + htab->elf.splt->output_offset
+ + h->plt.offset);
unresolved_reloc = FALSE;
break;
/* For local symbols or if we didn't make a PLT entry for
this symbol resolve the symbol directly. */
- if ( h == NULL
+ if (h == NULL
|| h->plt.offset == (bfd_vma) -1
- || htab->elf.splt == NULL)
+ || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
{
relocation -= htab->elf.sgot->output_section->vma;
break;
}
- relocation = (htab->elf.splt->output_section->vma
- + htab->elf.splt->output_offset
- + h->plt.offset
- - htab->elf.sgot->output_section->vma);
+ if (s390_is_ifunc_symbol_p (h))
+ relocation = (htab->elf.iplt->output_section->vma
+ + htab->elf.iplt->output_offset
+ + h->plt.offset
+ - htab->elf.sgot->output_section->vma);
+ else
+ relocation = (htab->elf.splt->output_section->vma
+ + htab->elf.splt->output_offset
+ + h->plt.offset
+ - htab->elf.sgot->output_section->vma);
unresolved_reloc = FALSE;
break;
- case R_390_8:
- case R_390_16:
- case R_390_32:
- case R_390_64:
case R_390_PC16:
+ case R_390_PC12DBL:
case R_390_PC16DBL:
+ case R_390_PC24DBL:
case R_390_PC32:
case R_390_PC32DBL:
case R_390_PC64:
+ if (h != NULL
+ && bfd_link_pie (info)
+ && !h->def_regular)
+ {
+ _bfd_error_handler (_("%B: `%s' non-PLT reloc for symbol defined "
+ "in shared library and accessed "
+ "from executable "
+ "(rebuild file with -fPIC ?)"),
+ input_bfd, h->root.root.string);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+ /* The target of these relocs are instruction operands
+ residing in read-only sections. We cannot emit a runtime
+ reloc for it. */
+ if (h != NULL
+ && s390_is_ifunc_symbol_p (h)
+ && h->def_regular
+ && bfd_link_pic (info))
+ {
+ relocation = (htab->elf.iplt->output_section->vma
+ + htab->elf.iplt->output_offset
+ + h->plt.offset);
+ goto do_relocation;
+ }
+ /* Fall through. */
+
+ case R_390_8:
+ case R_390_16:
+ case R_390_32:
+ case R_390_64:
+
+ if (h != NULL
+ && s390_is_ifunc_symbol_p (h)
+ && h->def_regular)
+ {
+ if (!bfd_link_pic (info))
+ {
+ /* For a non-shared object the symbol will not
+ change. Hence we can write the address of the
+ target IPLT slot now. */
+ relocation = (htab->elf.iplt->output_section->vma
+ + htab->elf.iplt->output_offset
+ + h ->plt.offset);
+ goto do_relocation;
+ }
+ else
+ {
+ /* For shared objects a runtime relocation is needed. */
+
+ Elf_Internal_Rela outrel;
+ asection *sreloc;
+
+ /* Need a dynamic relocation to get the real function
+ address. */
+ outrel.r_offset = _bfd_elf_section_offset (output_bfd,
+ info,
+ input_section,
+ rel->r_offset);
+ if (outrel.r_offset == (bfd_vma) -1
+ || outrel.r_offset == (bfd_vma) -2)
+ abort ();
+
+ outrel.r_offset += (input_section->output_section->vma
+ + input_section->output_offset);
+
+ if (h->dynindx == -1
+ || h->forced_local
+ || bfd_link_executable (info))
+ {
+ /* This symbol is resolved locally. */
+ outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
+ outrel.r_addend = (h->root.u.def.value
+ + h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset);
+ }
+ else
+ {
+ outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
+ outrel.r_addend = 0;
+ }
+
+ sreloc = htab->elf.irelifunc;
+ elf_append_rela (output_bfd, sreloc, &outrel);
+
+ /* If this reloc is against an external symbol, we
+ do not want to fiddle with the addend. Otherwise,
+ we need to include the symbol value so that it
+ becomes an addend for the dynamic reloc. For an
+ internal symbol, we have updated addend. */
+ continue;
+ }
+ }
+
if ((input_section->flags & SEC_ALLOC) == 0)
break;
- if ((info->shared
+ if ((bfd_link_pic (info)
&& (h == NULL
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| h->root.type != bfd_link_hash_undefweak)
&& ((r_type != R_390_PC16
+ && r_type != R_390_PC12DBL
&& r_type != R_390_PC16DBL
+ && r_type != R_390_PC24DBL
&& r_type != R_390_PC32
&& r_type != R_390_PC32DBL
&& r_type != R_390_PC64)
|| !SYMBOL_CALLS_LOCAL (info, h)))
|| (ELIMINATE_COPY_RELOCS
- && !info->shared
+ && !bfd_link_pic (info)
&& h != NULL
&& h->dynindx != -1
&& !h->non_got_ref
else if (h != NULL
&& h->dynindx != -1
&& (r_type == R_390_PC16
+ || r_type == R_390_PC12DBL
|| r_type == R_390_PC16DBL
+ || r_type == R_390_PC24DBL
|| r_type == R_390_PC32
|| r_type == R_390_PC32DBL
|| r_type == R_390_PC64
- || !info->shared
+ || !bfd_link_pic (info)
|| !SYMBOLIC_BIND (info, h)
|| !h->def_regular))
{
/* Relocations for tls literal pool entries. */
case R_390_TLS_IE64:
- if (info->shared)
+ if (bfd_link_pic (info))
{
Elf_Internal_Rela outrel;
asection *sreloc;
else if (h != NULL)
{
tls_type = elf_s390_hash_entry(h)->tls_type;
- if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
+ if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
r_type = R_390_TLS_LE64;
}
if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
if (local_got_offsets == NULL)
abort();
off = local_got_offsets[r_symndx];
- if (info->shared)
+ if (bfd_link_pic (info))
goto emit_tls_relocs;
}
else
{
off = h->got.offset;
tls_type = elf_s390_hash_entry(h)->tls_type;
- if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
+ if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
goto emit_tls_relocs;
}
break;
case R_390_TLS_LDM64:
- if (! info->shared)
+ if (! bfd_link_pic (info))
/* The literal pool entry this relocation refers to gets ignored
by the optimized code of the local exec model. Do nothing
and the value will turn out zero. */
break;
case R_390_TLS_LE64:
- if (info->shared)
+ if (bfd_link_dll (info))
{
/* Linking a shared library with non-fpic code requires
a R_390_TLS_TPOFF relocation. */
continue;
case R_390_TLS_LDO64:
- if (info->shared || (input_section->flags & SEC_DEBUGGING))
+ if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
relocation -= dtpoff_base (info);
else
/* When converting LDO to LE, we must negate. */
if (r_type == R_390_TLS_LOAD)
{
- if (!info->shared && (h == NULL || h->dynindx == -1))
+ if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
{
/* IE->LE transition. Four valid cases:
lg %rx,(0,%ry) -> sllg %rx,%ry,0
insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
if (insn1 != 0x0004)
- invalid_tls_insn (input_bfd, input_section, rel);
- ry = 0;
+ {
+ invalid_tls_insn (input_bfd, input_section, rel);
+ return FALSE;
+ }
if ((insn0 & 0xff00f000) == 0xe3000000)
/* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
ry = (insn0 & 0x000f0000);
/* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
ry = (insn0 & 0x0000f000) << 4;
else
- invalid_tls_insn (input_bfd, input_section, rel);
+ {
+ invalid_tls_insn (input_bfd, input_section, rel);
+ return FALSE;
+ }
insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
insn1 = 0x000d;
bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
if ((insn0 & 0xffff0000) != 0xc0e50000)
- invalid_tls_insn (input_bfd, input_section, rel);
- if (!info->shared && (h == NULL || h->dynindx == -1))
+ {
+ invalid_tls_insn (input_bfd, input_section, rel);
+ return FALSE;
+ }
+ if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
{
/* GD->LE transition.
brasl %r14,__tls_get_addr@plt -> brcl 0,. */
}
else if (r_type == R_390_TLS_LDCALL)
{
- if (!info->shared)
+ if (!bfd_link_pic (info))
{
unsigned int insn0, insn1;
insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
if ((insn0 & 0xffff0000) != 0xc0e50000)
- invalid_tls_insn (input_bfd, input_section, rel);
+ {
+ invalid_tls_insn (input_bfd, input_section, rel);
+ return FALSE;
+ }
/* LD->LE transition.
brasl %r14,__tls_get_addr@plt -> brcl 0,. */
insn0 = 0xc0040000;
&& h->def_dynamic)
&& _bfd_elf_section_offset (output_bfd, info, input_section,
rel->r_offset) != (bfd_vma) -1)
- (*_bfd_error_handler)
+ _bfd_error_handler
+ /* xgettext:c-format */
(_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
input_bfd,
input_section,
howto->name,
h->root.root.string);
+ do_relocation:
+
+ /* When applying a 24 bit reloc we need to start one byte
+ earlier. Otherwise the 32 bit get/put bfd operations might
+ access a byte after the actual section. */
+ if (r_type == R_390_PC24DBL
+ || r_type == R_390_PLT24DBL)
+ rel->r_offset--;
+
if (r_type == R_390_20
|| r_type == R_390_GOT20
|| r_type == R_390_GOTPLT20
}
if (r == bfd_reloc_overflow)
- {
-
- if (! ((*info->callbacks->reloc_overflow)
- (info, (h ? &h->root : NULL), name, howto->name,
- (bfd_vma) 0, input_bfd, input_section,
- rel->r_offset)))
- return FALSE;
- }
+ (*info->callbacks->reloc_overflow)
+ (info, (h ? &h->root : NULL), name, howto->name,
+ (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
else
{
- (*_bfd_error_handler)
+ _bfd_error_handler
+ /* xgettext:c-format */
(_("%B(%A+0x%lx): reloc against `%s': error %d"),
input_bfd, input_section,
(long) rel->r_offset, name, (int) r);
return TRUE;
}
+/* Generate the PLT slots together with the dynamic relocations needed
+ for IFUNC symbols. */
+
+static void
+elf_s390_finish_ifunc_symbol (bfd *output_bfd,
+ struct bfd_link_info *info,
+ struct elf_link_hash_entry *h,
+ struct elf_s390_link_hash_table *htab,
+ bfd_vma plt_offset,
+ bfd_vma resolver_address)
+{
+ bfd_vma plt_index;
+ bfd_vma got_offset;
+ Elf_Internal_Rela rela;
+ bfd_byte *loc;
+ asection *plt, *gotplt, *relplt;
+
+ if (htab->elf.iplt == NULL
+ || htab->elf.igotplt == NULL
+ || htab->elf.irelplt == NULL)
+ abort ();
+
+ /* Index of the PLT slot within iplt section. */
+ plt_index = plt_offset / PLT_ENTRY_SIZE;
+ plt = htab->elf.iplt;
+ /* Offset into the igot.plt section. */
+ got_offset = plt_index * GOT_ENTRY_SIZE;
+ gotplt = htab->elf.igotplt;
+ relplt = htab->elf.irelplt;
+
+ /* Fill in the blueprint of a PLT. */
+ memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
+ PLT_ENTRY_SIZE);
+
+ /* Fixup the relative address to the GOT entry */
+ bfd_put_32 (output_bfd,
+ (gotplt->output_section->vma +
+ gotplt->output_offset + got_offset
+ - (plt->output_section->vma +
+ plt->output_offset +
+ plt_offset))/2,
+ plt->contents + plt_offset + 2);
+ /* Fixup the relative branch to PLT 0 */
+ bfd_put_32 (output_bfd, - (plt->output_offset +
+ (PLT_ENTRY_SIZE * plt_index) + 22)/2,
+ plt->contents + plt_offset + 24);
+ /* Fixup offset into .rela.plt section. */
+ bfd_put_32 (output_bfd, relplt->output_offset +
+ plt_index * sizeof (Elf64_External_Rela),
+ plt->contents + plt_offset + 28);
+
+ /* Fill in the entry in the global offset table.
+ Points to instruction after GOT offset. */
+ bfd_put_64 (output_bfd,
+ (plt->output_section->vma
+ + plt->output_offset
+ + plt_offset
+ + 14),
+ gotplt->contents + got_offset);
+
+ /* Fill in the entry in the .rela.plt section. */
+ rela.r_offset = (gotplt->output_section->vma
+ + gotplt->output_offset
+ + got_offset);
+
+ if (!h
+ || h->dynindx == -1
+ || ((bfd_link_executable (info)
+ || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
+ && h->def_regular))
+ {
+ /* The symbol can be locally resolved. */
+ rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
+ rela.r_addend = resolver_address;
+ }
+ else
+ {
+ rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
+ rela.r_addend = 0;
+ }
+
+ loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
+ bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
+}
+
+
/* Finish up dynamic symbol handling. We set the contents of various
dynamic sections here. */
Elf_Internal_Sym *sym)
{
struct elf_s390_link_hash_table *htab;
+ struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
htab = elf_s390_hash_table (info);
if (htab == NULL)
/* This symbol has an entry in the procedure linkage table. Set
it up. */
+ if (s390_is_ifunc_symbol_p (h) && h->def_regular)
+ {
+ elf_s390_finish_ifunc_symbol (output_bfd, info, h,
+ htab, h->plt.offset,
+ eh->ifunc_resolver_address +
+ eh->ifunc_resolver_section->output_offset +
+ eh->ifunc_resolver_section->output_section->vma);
+
+ /* Do not return yet. Handling of explicit GOT slots of
+ IFUNC symbols is below. */
+ }
+ else
+ {
+ if (h->dynindx == -1
+ || htab->elf.splt == NULL
+ || htab->elf.sgotplt == NULL
+ || htab->elf.srelplt == NULL)
+ abort ();
- if (h->dynindx == -1
- || htab->elf.splt == NULL
- || htab->elf.sgotplt == NULL
- || htab->elf.srelplt == NULL)
- abort ();
+ /* Calc. index no.
+ Current offset - size first entry / entry size. */
+ plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
- /* Calc. index no.
- Current offset - size first entry / entry size. */
- plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
-
- /* Offset in GOT is PLT index plus GOT headers(3) times 8,
- addr & GOT addr. */
- got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
-
- /* Fill in the blueprint of a PLT. */
- memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
- PLT_ENTRY_SIZE);
-
- /* Fixup the relative address to the GOT entry */
- bfd_put_32 (output_bfd,
- (htab->elf.sgotplt->output_section->vma +
- htab->elf.sgotplt->output_offset + got_offset
- - (htab->elf.splt->output_section->vma + h->plt.offset))/2,
- htab->elf.splt->contents + h->plt.offset + 2);
- /* Fixup the relative branch to PLT 0 */
- bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
- (PLT_ENTRY_SIZE * plt_index) + 22)/2,
- htab->elf.splt->contents + h->plt.offset + 24);
- /* Fixup offset into symbol table */
- bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
- htab->elf.splt->contents + h->plt.offset + 28);
-
- /* Fill in the entry in the global offset table.
- Points to instruction after GOT offset. */
- bfd_put_64 (output_bfd,
- (htab->elf.splt->output_section->vma
- + htab->elf.splt->output_offset
- + h->plt.offset
- + 14),
- htab->elf.sgotplt->contents + got_offset);
-
- /* Fill in the entry in the .rela.plt section. */
- rela.r_offset = (htab->elf.sgotplt->output_section->vma
- + htab->elf.sgotplt->output_offset
- + got_offset);
- rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
- rela.r_addend = 0;
- loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
- bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
+ /* Offset in GOT is PLT index plus GOT headers(3) times 8,
+ addr & GOT addr. */
+ got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
- if (!h->def_regular)
- {
- /* Mark the symbol as undefined, rather than as defined in
- the .plt section. Leave the value alone. This is a clue
- for the dynamic linker, to make function pointer
- comparisons work between an application and shared
- library. */
- sym->st_shndx = SHN_UNDEF;
+ /* Fill in the blueprint of a PLT. */
+ memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
+ PLT_ENTRY_SIZE);
+
+ /* Fixup the relative address to the GOT entry */
+ bfd_put_32 (output_bfd,
+ (htab->elf.sgotplt->output_section->vma +
+ htab->elf.sgotplt->output_offset + got_offset
+ - (htab->elf.splt->output_section->vma +
+ htab->elf.splt->output_offset +
+ h->plt.offset))/2,
+ htab->elf.splt->contents + h->plt.offset + 2);
+ /* Fixup the relative branch to PLT 0 */
+ bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
+ (PLT_ENTRY_SIZE * plt_index) + 22)/2,
+ htab->elf.splt->contents + h->plt.offset + 24);
+ /* Fixup offset into .rela.plt section. */
+ bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
+ htab->elf.splt->contents + h->plt.offset + 28);
+
+ /* Fill in the entry in the global offset table.
+ Points to instruction after GOT offset. */
+ bfd_put_64 (output_bfd,
+ (htab->elf.splt->output_section->vma
+ + htab->elf.splt->output_offset
+ + h->plt.offset
+ + 14),
+ htab->elf.sgotplt->contents + got_offset);
+
+ /* Fill in the entry in the .rela.plt section. */
+ rela.r_offset = (htab->elf.sgotplt->output_section->vma
+ + htab->elf.sgotplt->output_offset
+ + got_offset);
+ rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
+ rela.r_addend = 0;
+ loc = htab->elf.srelplt->contents + plt_index *
+ sizeof (Elf64_External_Rela);
+ bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
+
+ if (!h->def_regular)
+ {
+ /* Mark the symbol as undefined, rather than as defined in
+ the .plt section. Leave the value alone. This is a clue
+ for the dynamic linker, to make function pointer
+ comparisons work between an application and shared
+ library. */
+ sym->st_shndx = SHN_UNDEF;
+ }
}
}
+ htab->elf.sgot->output_offset
+ (h->got.offset &~ (bfd_vma) 1));
- /* If this is a static link, or it 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
- && SYMBOL_REFERENCES_LOCAL (info, h))
+ if (h->def_regular && s390_is_ifunc_symbol_p (h))
{
- if (!h->def_regular)
+ if (bfd_link_pic (info))
+ {
+ /* An explicit GOT slot usage needs GLOB_DAT. If the
+ symbol references local the implicit got.iplt slot
+ will be used and the IRELATIVE reloc has been created
+ above. */
+ goto do_glob_dat;
+ }
+ else
+ {
+ /* For non-shared objects explicit GOT slots must be
+ filled with the PLT slot address for pointer
+ equality reasons. */
+ bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
+ + htab->elf.iplt->output_offset
+ + h->plt.offset),
+ htab->elf.sgot->contents + h->got.offset);
+ return TRUE;
+ }
+ }
+ else if (bfd_link_pic (info)
+ && SYMBOL_REFERENCES_LOCAL (info, h))
+ {
+ /* If this is a static link, or it 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 (!(h->def_regular || ELF_COMMON_DEF_P (h)))
return FALSE;
BFD_ASSERT((h->got.offset & 1) != 0);
rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
else
{
BFD_ASSERT((h->got.offset & 1) == 0);
+ do_glob_dat:
bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
rela.r_addend = 0;
if (h->needs_copy)
{
Elf_Internal_Rela rela;
+ asection *s;
bfd_byte *loc;
/* This symbols 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)
- || htab->srelbss == NULL)
+ || htab->elf.srelbss == NULL)
abort ();
rela.r_offset = (h->root.u.def.value
+ h->root.u.def.section->output_offset);
rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
rela.r_addend = 0;
- loc = htab->srelbss->contents;
- loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
+ if (h->root.u.def.section == htab->elf.sdynrelro)
+ s = htab->elf.sreldynrelro;
+ else
+ s = htab->elf.srelbss;
+ loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
}
/* Mark some specially defined symbols as absolute. */
- if (strcmp (h->root.root.string, "_DYNAMIC") == 0
+ if (h == htab->elf.hdynamic
|| h == htab->elf.hgot
|| h == htab->elf.hplt)
sym->st_shndx = SHN_ABS;
dynamic linker, before writing them out. */
static enum elf_reloc_type_class
-elf_s390_reloc_type_class (rela)
- const Elf_Internal_Rela *rela;
+elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ const asection *rel_sec ATTRIBUTE_UNUSED,
+ const Elf_Internal_Rela *rela)
{
+ bfd *abfd = info->output_bfd;
+ const struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
+ unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
+ Elf_Internal_Sym sym;
+
+ if (htab->elf.dynsym == NULL
+ || !bed->s->swap_symbol_in (abfd,
+ (htab->elf.dynsym->contents
+ + r_symndx * bed->s->sizeof_sym),
+ 0, &sym))
+ abort ();
+
+ /* Check relocation against STT_GNU_IFUNC symbol. */
+ if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
+ return reloc_class_ifunc;
+
switch ((int) ELF64_R_TYPE (rela->r_info))
{
case R_390_RELATIVE:
struct elf_s390_link_hash_table *htab;
bfd *dynobj;
asection *sdyn;
+ bfd *ibfd;
+ unsigned int i;
htab = elf_s390_hash_table (info);
if (htab == NULL)
return FALSE;
dynobj = htab->elf.dynobj;
- sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
+ sdyn = bfd_get_linker_section (dynobj, ".dynamic");
if (htab->elf.dynamic_sections_created)
{
continue;
case DT_PLTGOT:
- dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
+ s = htab->elf.sgotplt;
+ dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
break;
case DT_JMPREL:
- dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
+ s = htab->elf.srelplt;
+ dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
break;
case DT_PLTRELSZ:
- s = htab->elf.srelplt->output_section;
- dyn.d_un.d_val = s->size;
+ dyn.d_un.d_val = htab->elf.srelplt->size + htab->elf.irelplt->size;
break;
case DT_RELASZ:
linker script arranges for .rela.plt to follow all
other relocation sections, we don't have to worry
about changing the DT_RELA entry. */
- s = htab->elf.srelplt->output_section;
- dyn.d_un.d_val -= s->size;
+ dyn.d_un.d_val -= htab->elf.srelplt->size + htab->elf.irelplt->size;
break;
}
PLT_FIRST_ENTRY_SIZE);
/* Fixup relative address to start of GOT */
bfd_put_32 (output_bfd,
- (htab->elf.sgotplt->output_section->vma +
- htab->elf.sgotplt->output_offset
- - htab->elf.splt->output_section->vma - 6)/2,
+ (htab->elf.sgotplt->output_section->vma
+ + htab->elf.sgotplt->output_offset
+ - htab->elf.splt->output_section->vma
+ - htab->elf.splt->output_offset - 6)/2,
htab->elf.splt->contents + 8);
}
- elf_section_data (htab->elf.splt->output_section)
- ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
+ if (elf_section_data (htab->elf.splt->output_section) != NULL)
+ elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
+ = PLT_ENTRY_SIZE;
}
if (htab->elf.sgotplt)
/* One entry for shared object struct ptr. */
bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
/* One entry for _dl_runtime_resolve. */
- bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 12);
+ bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 16);
}
elf_section_data (htab->elf.sgot->output_section)
->this_hdr.sh_entsize = 8;
}
+
+ /* Finish dynamic symbol for local IFUNC symbols. */
+ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
+ {
+ struct plt_entry *local_plt;
+ Elf_Internal_Sym *isym;
+ Elf_Internal_Shdr *symtab_hdr;
+
+ symtab_hdr = &elf_symtab_hdr (ibfd);
+
+ local_plt = elf_s390_local_plt (ibfd);
+ if (local_plt != NULL)
+ for (i = 0; i < symtab_hdr->sh_info; i++)
+ {
+ if (local_plt[i].plt.offset != (bfd_vma) -1)
+ {
+ asection *sec = local_plt[i].sec;
+ isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
+ if (isym == NULL)
+ return FALSE;
+
+ if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
+ elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
+ local_plt[i].plt.offset,
+ isym->st_value
+ + sec->output_section->vma
+ + sec->output_offset);
+
+ }
+ }
+ }
+
return TRUE;
}
+\f
+/* Support for core dump NOTE sections. */
+
+static bfd_boolean
+elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
+{
+ int offset;
+ size_t size;
+
+ switch (note->descsz)
+ {
+ default:
+ return FALSE;
+
+ case 336: /* sizeof(struct elf_prstatus) on s390x */
+ /* pr_cursig */
+ elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
+
+ /* pr_pid */
+ elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
+
+ /* pr_reg */
+ offset = 112;
+ size = 216;
+ break;
+ }
+
+ /* Make a ".reg/999" section. */
+ return _bfd_elfcore_make_pseudosection (abfd, ".reg",
+ size, note->descpos + offset);
+}
+
+static bfd_boolean
+elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
+{
+ switch (note->descsz)
+ {
+ default:
+ return FALSE;
+
+ case 136: /* sizeof(struct elf_prpsinfo) on s390x */
+ elf_tdata (abfd)->core->pid
+ = bfd_get_32 (abfd, note->descdata + 24);
+ elf_tdata (abfd)->core->program
+ = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
+ elf_tdata (abfd)->core->command
+ = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
+ }
+
+ /* Note that for some reason, a spurious space is tacked
+ onto the end of the args in some (at least one anyway)
+ implementations, so strip it off if it exists. */
+
+ {
+ char *command = elf_tdata (abfd)->core->command;
+ int n = strlen (command);
+
+ if (0 < n && command[n - 1] == ' ')
+ command[n - 1] = '\0';
+ }
+
+ return TRUE;
+}
+
+static char *
+elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
+ int note_type, ...)
+{
+ va_list ap;
+
+ switch (note_type)
+ {
+ default:
+ return NULL;
+
+ case NT_PRPSINFO:
+ {
+ char data[136] = { 0 };
+ const char *fname, *psargs;
+
+ va_start (ap, note_type);
+ fname = va_arg (ap, const char *);
+ psargs = va_arg (ap, const char *);
+ va_end (ap);
+
+ strncpy (data + 40, fname, 16);
+ strncpy (data + 56, psargs, 80);
+ return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
+ &data, sizeof (data));
+ }
+ case NT_PRSTATUS:
+ {
+ char data[336] = { 0 };
+ long pid;
+ int cursig;
+ const void *gregs;
+
+ va_start (ap, note_type);
+ pid = va_arg (ap, long);
+ cursig = va_arg (ap, int);
+ gregs = va_arg (ap, const void *);
+ va_end (ap);
+
+ bfd_put_16 (abfd, cursig, data + 12);
+ bfd_put_32 (abfd, pid, data + 32);
+ memcpy (data + 112, gregs, 216);
+ return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
+ &data, sizeof (data));
+ }
+ }
+ /* NOTREACHED */
+}
+\f
/* Return address for Ith PLT stub in section PLT, for relocation REL
or (bfd_vma) -1 if it should not be included. */
return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
}
+/* Merge backend specific data from an object file to the output
+ object file when linking. */
+
+static bfd_boolean
+elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
+{
+ if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
+ return TRUE;
+
+ return elf_s390_merge_obj_attributes (ibfd, info);
+}
+
+/* We may add a PT_S390_PGSTE program header. */
+
+static int
+elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ struct elf_s390_link_hash_table *htab;
+
+ htab = elf_s390_hash_table (info);
+ return htab->params->pgste;
+}
+
+
+/* Add the PT_S390_PGSTE program header. */
+
+static bfd_boolean
+elf_s390_modify_segment_map (bfd *abfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ struct elf_s390_link_hash_table *htab;
+ struct elf_segment_map *m, *pm = NULL;
+
+ htab = elf_s390_hash_table (info);
+ if (!htab->params->pgste)
+ return TRUE;
+
+ /* If there is already a PT_S390_PGSTE header, avoid adding
+ another. */
+ m = elf_seg_map (abfd);
+ while (m && m->p_type != PT_S390_PGSTE)
+ {
+ pm = m;
+ m = m->next;
+ }
+
+ if (m)
+ return TRUE;
+
+ m = (struct elf_segment_map *)
+ bfd_zalloc (abfd, sizeof (struct elf_segment_map));
+ if (m == NULL)
+ return FALSE;
+ m->p_type = PT_S390_PGSTE;
+ m->count = 0;
+ m->next = NULL;
+ if (pm)
+ pm->next = m;
+
+ return TRUE;
+}
+
+bfd_boolean
+bfd_elf_s390_set_options (struct bfd_link_info *info,
+ struct s390_elf_params *params)
+{
+ struct elf_s390_link_hash_table *htab;
+
+ htab = elf_s390_hash_table (info);
+ htab->params = params;
+
+ return TRUE;
+}
+
/* Why was the hash table entry size definition changed from
ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
bfd_elf64_swap_reloca_out
};
-#define TARGET_BIG_SYM bfd_elf64_s390_vec
+#define TARGET_BIG_SYM s390_elf64_vec
#define TARGET_BIG_NAME "elf64-s390"
#define ELF_ARCH bfd_arch_s390
#define ELF_TARGET_ID S390_ELF_DATA
#define elf_backend_plt_readonly 1
#define elf_backend_want_plt_sym 0
#define elf_backend_got_header_size 24
+#define elf_backend_want_dynrelro 1
#define elf_backend_rela_normal 1
#define elf_info_to_howto elf_s390_info_to_howto
#define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
#define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
#define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
-#define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
+#define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
+#define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
#define elf_backend_check_relocs elf_s390_check_relocs
#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
-#define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
+#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
#define elf_backend_relocate_section elf_s390_relocate_section
#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
#define elf_backend_init_index_section _bfd_elf_init_1_index_section
-#define elf_backend_reloc_type_class elf_s390_reloc_type_class
+#define elf_backend_grok_prstatus elf_s390_grok_prstatus
+#define elf_backend_grok_psinfo elf_s390_grok_psinfo
+#define elf_backend_write_core_note elf_s390_write_core_note
#define elf_backend_plt_sym_val elf_s390_plt_sym_val
+#define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
+#define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
+#define elf_backend_additional_program_headers elf_s390_additional_program_headers
+#define elf_backend_modify_segment_map elf_s390_modify_segment_map
#define bfd_elf64_mkobject elf_s390_mkobject
#define elf_backend_object_p elf_s390_object_p
projects / deliverable / binutils-gdb.git / blobdiff