/* IBM S/390-specific support for 32-bit ELF
- Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
+ Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
Contributed by Carl B. Pedersen and Martin Schwidefsky.
This file is part of BFD, the Binary File Descriptor library.
PARAMS ((const Elf_Internal_Rela *));
static bfd_boolean elf_s390_finish_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
+static bfd_boolean elf_s390_mkobject
+ PARAMS ((bfd *));
static bfd_boolean elf_s390_object_p
PARAMS ((bfd *));
static bfd_boolean elf_s390_grok_prstatus
PARAMS ((bfd *, Elf_Internal_Note *));
+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 *));
#include "elf/s390.h"
HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
+ HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
+ s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
+ HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
+ s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
+ HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
+ s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
+ HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
+ EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
+ HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
+ bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
+ HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
+ EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
+ HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
+ EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
+ HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
+ EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
+ HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
+ HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
+ EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
+ HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
+ EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
+ HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
+ HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
+ HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
};
/* GNU extension to record C++ vtable hierarchy. */
return &elf_howto_table[(int) R_390_PLTOFF16];
case BFD_RELOC_390_PLTOFF32:
return &elf_howto_table[(int) R_390_PLTOFF32];
+ case BFD_RELOC_390_TLS_LOAD:
+ return &elf_howto_table[(int) R_390_TLS_LOAD];
+ case BFD_RELOC_390_TLS_GDCALL:
+ return &elf_howto_table[(int) R_390_TLS_GDCALL];
+ case BFD_RELOC_390_TLS_LDCALL:
+ return &elf_howto_table[(int) R_390_TLS_LDCALL];
+ case BFD_RELOC_390_TLS_GD32:
+ return &elf_howto_table[(int) R_390_TLS_GD32];
+ case BFD_RELOC_390_TLS_GOTIE12:
+ return &elf_howto_table[(int) R_390_TLS_GOTIE12];
+ case BFD_RELOC_390_TLS_GOTIE32:
+ return &elf_howto_table[(int) R_390_TLS_GOTIE32];
+ case BFD_RELOC_390_TLS_LDM32:
+ return &elf_howto_table[(int) R_390_TLS_LDM32];
+ case BFD_RELOC_390_TLS_IE32:
+ return &elf_howto_table[(int) R_390_TLS_IE32];
+ case BFD_RELOC_390_TLS_IEENT:
+ return &elf_howto_table[(int) R_390_TLS_IEENT];
+ case BFD_RELOC_390_TLS_LE32:
+ return &elf_howto_table[(int) R_390_TLS_LE32];
+ case BFD_RELOC_390_TLS_LDO32:
+ return &elf_howto_table[(int) R_390_TLS_LDO32];
+ case BFD_RELOC_390_TLS_DTPMOD:
+ return &elf_howto_table[(int) R_390_TLS_DTPMOD];
+ case BFD_RELOC_390_TLS_DTPOFF:
+ return &elf_howto_table[(int) R_390_TLS_DTPOFF];
+ case BFD_RELOC_390_TLS_TPOFF:
+ return &elf_howto_table[(int) R_390_TLS_TPOFF];
case BFD_RELOC_VTABLE_INHERIT:
return &elf32_s390_vtinherit_howto;
case BFD_RELOC_VTABLE_ENTRY:
}
}
+/* 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;
+{
+ if (output_bfd)
+ reloc_entry->address += input_section->output_offset;
+ return bfd_reloc_ok;
+}
+
static bfd_boolean
elf_s390_is_local_label_name (abfd, name)
bfd *abfd;
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.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
+ section, and instead use a dynamic relocation to point into the
+ shared lib. */
+#define ELIMINATE_COPY_RELOCS 1
+
/* The size in bytes of the first entry in the procedure linkage table. */
#define PLT_FIRST_ENTRY_SIZE 32
/* The size in bytes of an entry in the procedure linkage table. */
/* Number of GOTPLT references for a function. */
bfd_signed_vma gotplt_refcount;
+
+#define GOT_UNKNOWN 0
+#define GOT_NORMAL 1
+#define GOT_TLS_GD 2
+#define GOT_TLS_IE 3
+#define GOT_TLS_IE_NLT 4
+ unsigned char tls_type;
+};
+
+#define elf_s390_hash_entry(ent) \
+ ((struct elf_s390_link_hash_entry *)(ent))
+
+struct elf_s390_obj_tdata
+{
+ struct elf_obj_tdata root;
+
+ /* 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_got_tls_type(abfd) \
+ (elf_s390_tdata (abfd)->local_got_tls_type)
+
+static bfd_boolean
+elf_s390_mkobject (abfd)
+ bfd *abfd;
+{
+ bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
+ abfd->tdata.any = bfd_zalloc (abfd, amt);
+ if (abfd->tdata.any == NULL)
+ return FALSE;
+ return TRUE;
+}
+
+static bfd_boolean
+elf_s390_object_p (abfd)
+ bfd *abfd;
+{
+ /* Allocate our special target data. */
+ struct elf_s390_obj_tdata *new_tdata;
+ bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
+ new_tdata = bfd_zalloc (abfd, amt);
+ if (new_tdata == NULL)
+ return FALSE;
+ new_tdata->root = *abfd->tdata.elf_obj_data;
+ abfd->tdata.any = new_tdata;
+ /* Set the right machine number for an s390 elf32 file. */
+ return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
+}
+
/* s390 ELF linker hash table. */
struct elf_s390_link_hash_table
asection *sdynbss;
asection *srelbss;
+ union {
+ bfd_signed_vma refcount;
+ bfd_vma offset;
+ } tls_ldm_got;
+
/* Small local sym to section mapping cache. */
struct sym_sec_cache sym_sec;
};
eh = (struct elf_s390_link_hash_entry *) entry;
eh->dyn_relocs = NULL;
eh->gotplt_refcount = 0;
+ eh->tls_type = GOT_UNKNOWN;
}
return entry;
ret->srelplt = NULL;
ret->sdynbss = NULL;
ret->srelbss = NULL;
+ ret->tls_ldm_got.refcount = 0;
ret->sym_sec.abfd = NULL;
return &ret->elf.root;
eind->dyn_relocs = NULL;
}
- _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
+ if (ind->root.type == bfd_link_hash_indirect
+ && dir->got.refcount <= 0)
+ {
+ edir->tls_type = eind->tls_type;
+ eind->tls_type = GOT_UNKNOWN;
+ }
+
+ if (ELIMINATE_COPY_RELOCS
+ && ind->root.type != bfd_link_hash_indirect
+ && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
+ /* If called to transfer flags for a weakdef during processing
+ of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
+ We clear it ourselves for ELIMINATE_COPY_RELOCS. */
+ dir->elf_link_hash_flags |=
+ (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
+ | ELF_LINK_HASH_REF_REGULAR
+ | ELF_LINK_HASH_REF_REGULAR_NONWEAK));
+ else
+ _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
+}
+
+static int
+elf_s390_tls_transition (info, r_type, is_local)
+ struct bfd_link_info *info;
+ int r_type;
+ int is_local;
+{
+ if (info->shared)
+ return r_type;
+
+ switch (r_type)
+ {
+ case R_390_TLS_GD32:
+ case R_390_TLS_IE32:
+ if (is_local)
+ return R_390_TLS_LE32;
+ return R_390_TLS_IE32;
+ case R_390_TLS_GOTIE32:
+ if (is_local)
+ return R_390_TLS_LE32;
+ return R_390_TLS_GOTIE32;
+ case R_390_TLS_LDM32:
+ return R_390_TLS_LE32;
+ }
+
+ return r_type;
}
/* Look through the relocs for a section during the first phase, and
const Elf_Internal_Rela *rel_end;
asection *sreloc;
bfd_signed_vma *local_got_refcounts;
+ int tls_type, old_tls_type;
- if (info->relocateable)
+ if (info->relocatable)
return TRUE;
htab = elf_s390_hash_table (info);
rel_end = relocs + sec->reloc_count;
for (rel = relocs; rel < rel_end; rel++)
{
+ unsigned int r_type;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
/* Create got section and local_got_refcounts array if they
are needed. */
- switch (ELF32_R_TYPE (rel->r_info))
+ r_type = elf_s390_tls_transition (info,
+ ELF32_R_TYPE (rel->r_info),
+ h == NULL);
+ switch (r_type)
{
case R_390_GOT12:
case R_390_GOT16:
case R_390_GOTPLT16:
case R_390_GOTPLT32:
case R_390_GOTPLTENT:
+ case R_390_TLS_GD32:
+ case R_390_TLS_GOTIE12:
+ case R_390_TLS_GOTIE32:
+ case R_390_TLS_IEENT:
+ case R_390_TLS_IE32:
+ case R_390_TLS_LDM32:
if (h == NULL
&& local_got_refcounts == NULL)
{
bfd_size_type size;
-
+
size = symtab_hdr->sh_info;
- size *= sizeof (bfd_signed_vma);
+ size *= (sizeof (bfd_signed_vma) + sizeof(char));
local_got_refcounts = ((bfd_signed_vma *)
bfd_zalloc (abfd, size));
if (local_got_refcounts == NULL)
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);
}
/* Fall through. */
case R_390_GOTOFF16:
}
}
- switch (ELF32_R_TYPE (rel->r_info))
+ switch (r_type)
{
- case R_390_GOT12:
- case R_390_GOT16:
- case R_390_GOT32:
- case R_390_GOTENT:
- /* This symbol requires a global offset table entry. */
- if (h != NULL)
- h->got.refcount += 1;
- else
- local_got_refcounts[r_symndx] += 1;
- break;
-
case R_390_GOTOFF16:
case R_390_GOTOFF32:
case R_390_GOTPC:
/* Got is created, nothing to be done. */
break;
- case R_390_PLT16DBL:
- case R_390_PLT32DBL:
+ case R_390_PLT16DBL:
+ case R_390_PLT32DBL:
case R_390_PLT32:
case R_390_PLTOFF16:
case R_390_PLTOFF32:
/* This symbol requires a procedure linkage table entry. We
- actually build the entry in adjust_dynamic_symbol,
- because this might be a case of linking PIC code which is
- never referenced by a dynamic object, in which case we
- don't need to generate a procedure linkage table entry
- after all. */
+ actually build the entry in adjust_dynamic_symbol,
+ because this might be a case of linking PIC code which is
+ never referenced by a dynamic object, in which case we
+ don't need to generate a procedure linkage table entry
+ after all. */
/* If this is a local symbol, we resolve it directly without
- creating a procedure linkage table entry. */
+ creating a procedure linkage table entry. */
if (h != NULL)
{
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
local_got_refcounts[r_symndx] += 1;
break;
- case R_390_8:
- case R_390_16:
+ case R_390_TLS_LDM32:
+ htab->tls_ldm_got.refcount += 1;
+ break;
+
+ case R_390_TLS_IE32:
+ case R_390_TLS_GOTIE12:
+ case R_390_TLS_GOTIE32:
+ case R_390_TLS_IEENT:
+ if (info->shared)
+ info->flags |= DF_STATIC_TLS;
+ /* Fall through. */
+
+ case R_390_GOT12:
+ case R_390_GOT16:
+ case R_390_GOT32:
+ case R_390_GOTENT:
+ case R_390_TLS_GD32:
+ /* This symbol requires a global offset table entry. */
+ switch (r_type)
+ {
+ default:
+ case R_390_GOT12:
+ case R_390_GOT16:
+ case R_390_GOT32:
+ case R_390_GOTENT:
+ tls_type = GOT_NORMAL;
+ break;
+ case R_390_TLS_GD32:
+ tls_type = GOT_TLS_GD;
+ break;
+ case R_390_TLS_IE32:
+ case R_390_TLS_GOTIE32:
+ tls_type = GOT_TLS_IE;
+ break;
+ case R_390_TLS_GOTIE12:
+ case R_390_TLS_IEENT:
+ tls_type = GOT_TLS_IE_NLT;
+ break;
+ }
+
+ if (h != NULL)
+ {
+ h->got.refcount += 1;
+ old_tls_type = elf_s390_hash_entry(h)->tls_type;
+ }
+ else
+ {
+ local_got_refcounts[r_symndx] += 1;
+ old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
+ }
+ /* If a TLS symbol is accessed using IE at least once,
+ there is no point to use dynamic model for it. */
+ if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
+ {
+ if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
+ {
+ (*_bfd_error_handler)
+ (_("%s: `%s' accessed both as normal and thread local symbol"),
+ bfd_archive_filename (abfd), h->root.root.string);
+ return FALSE;
+ }
+ if (old_tls_type > tls_type)
+ tls_type = old_tls_type;
+ }
+
+ if (old_tls_type != tls_type)
+ {
+ if (h != NULL)
+ elf_s390_hash_entry (h)->tls_type = tls_type;
+ else
+ elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
+ }
+
+ if (r_type != R_390_TLS_IE32)
+ break;
+ /* Fall through. */
+
+ case R_390_TLS_LE32:
+ if (!info->shared)
+ break;
+ info->flags |= DF_STATIC_TLS;
+ /* Fall through. */
+
+ case R_390_8:
+ case R_390_16:
case R_390_32:
- case R_390_PC16:
- case R_390_PC16DBL:
+ case R_390_PC16:
+ case R_390_PC16DBL:
case R_390_PC32DBL:
case R_390_PC32:
if (h != NULL && !info->shared)
|| h->root.type == bfd_link_hash_defweak
|| (h->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
- || (!info->shared
+ || (ELIMINATE_COPY_RELOCS
+ && !info->shared
&& (sec->flags & SEC_ALLOC) != 0
&& h != NULL
&& (h->root.type == bfd_link_hash_defweak
/* Track dynamic relocs needed for local syms too.
We really need local syms available to do this
easily. Oh well. */
-
asection *s;
+
s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
sec, r_symndx);
if (s == NULL)
if (p == NULL || p->sec != sec)
{
bfd_size_type amt = sizeof *p;
+
p = ((struct elf_s390_dyn_relocs *)
bfd_alloc (htab->elf.dynobj, amt));
if (p == NULL)
/* This relocation describes the C++ object vtable hierarchy.
Reconstruct it for later use during GC. */
- case R_390_GNU_VTINHERIT:
- if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
- return FALSE;
- break;
+ case R_390_GNU_VTINHERIT:
+ if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
+ return FALSE;
+ break;
/* This relocation describes which C++ vtable entries are actually
used. Record for later use during GC. */
- case R_390_GNU_VTENTRY:
- if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
- return FALSE;
- break;
+ case R_390_GNU_VTENTRY:
+ if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
+ return FALSE;
+ break;
default:
break;
struct elf_link_hash_entry **sym_hashes;
bfd_signed_vma *local_got_refcounts;
const Elf_Internal_Rela *rel, *relend;
- unsigned long r_symndx;
- struct elf_link_hash_entry *h;
elf_section_data (sec)->local_dynrel = NULL;
relend = relocs + sec->reloc_count;
for (rel = relocs; rel < relend; rel++)
{
+ unsigned long r_symndx;
+ unsigned int r_type;
+ struct elf_link_hash_entry *h = NULL;
+
r_symndx = ELF32_R_SYM (rel->r_info);
+ if (r_symndx >= symtab_hdr->sh_info)
+ {
+ struct elf_s390_link_hash_entry *eh;
+ struct elf_s390_dyn_relocs **pp;
+ struct elf_s390_dyn_relocs *p;
- if (r_symndx < symtab_hdr->sh_info)
- h = NULL;
- else
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ eh = (struct elf_s390_link_hash_entry *) h;
- switch (ELF32_R_TYPE (rel->r_info))
+ for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
+ if (p->sec == sec)
+ {
+ /* Everything must go for SEC. */
+ *pp = p->next;
+ break;
+ }
+ }
+
+ r_type = ELF32_R_TYPE (rel->r_info);
+ r_type = elf_s390_tls_transition (info, r_type, h != NULL);
+ switch (r_type)
{
+ case R_390_TLS_LDM32:
+ if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
+ elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
+ break;
+
+ case R_390_TLS_GD32:
+ case R_390_TLS_IE32:
+ case R_390_TLS_GOTIE12:
+ case R_390_TLS_GOTIE32:
+ case R_390_TLS_IEENT:
case R_390_GOT12:
case R_390_GOT16:
case R_390_GOT32:
local_got_refcounts[r_symndx] -= 1;
}
break;
-
+
+ case R_390_8:
+ case R_390_12:
+ case R_390_16:
+ case R_390_32:
+ case R_390_PC16:
+ case R_390_PC16DBL:
+ case R_390_PC32DBL:
+ case R_390_PC32:
+ if (info->shared)
+ break;
+ /* Fall through. */
+
case R_390_PLT16DBL:
case R_390_PLT32DBL:
case R_390_PLT32:
}
break;
- case R_390_8:
- case R_390_12:
- case R_390_16:
- case R_390_32:
- case R_390_PC16:
- case R_390_PC16DBL:
- case R_390_PC32DBL:
- case R_390_PC32:
- if (h != NULL)
- {
- struct elf_s390_link_hash_entry *eh;
- struct elf_s390_dyn_relocs **pp;
- struct elf_s390_dyn_relocs *p;
-
- if (!info->shared && h->plt.refcount > 0)
- h->plt.refcount -= 1;
-
- eh = (struct elf_s390_link_hash_entry *) h;
-
- for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
- if (p->sec == sec)
- {
- if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
- || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
- || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
- || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
- p->pc_count -= 1;
- p->count -= 1;
- if (p->count == 0)
- *pp = p->next;
- break;
- }
- }
- break;
-
default:
break;
}
struct elf_link_hash_entry *h;
{
struct elf_s390_link_hash_table *htab;
- struct elf_s390_link_hash_entry * eh;
- struct elf_s390_dyn_relocs *p;
asection *s;
unsigned int power_of_two;
&& h->root.type != bfd_link_hash_undefined))
{
/* This case can occur if we saw a PLT32 reloc in an input
- file, but the symbol was never referred to by a dynamic
- object, or if all references were garbage collected. In
+ file, but the symbol was never referred to by a dynamic
+ object, or if all references were garbage collected. In
such a case, we don't actually need to build a procedure
linkage table, and we can just do a PC32 reloc instead. */
h->plt.offset = (bfd_vma) -1;
|| h->weakdef->root.type == bfd_link_hash_defweak);
h->root.u.def.section = h->weakdef->root.u.def.section;
h->root.u.def.value = h->weakdef->root.u.def.value;
+ if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
+ h->elf_link_hash_flags
+ = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
+ | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
return TRUE;
}
return TRUE;
}
- eh = (struct elf_s390_link_hash_entry *) h;
- for (p = eh->dyn_relocs; p != NULL; p = p->next)
+ if (ELIMINATE_COPY_RELOCS)
{
- s = p->sec->output_section;
- if (s != NULL && (s->flags & SEC_READONLY) != 0)
- break;
- }
+ struct elf_s390_link_hash_entry * eh;
+ struct elf_s390_dyn_relocs *p;
- /* If we didn't find any dynamic relocs in read-only sections, then
- we'll be keeping the dynamic relocs and avoiding the copy reloc. */
- if (p == NULL)
- {
- h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
- return TRUE;
+ eh = (struct elf_s390_link_hash_entry *) h;
+ for (p = eh->dyn_relocs; p != NULL; p = p->next)
+ {
+ s = p->sec->output_section;
+ if (s != NULL && (s->flags & SEC_READONLY) != 0)
+ break;
+ }
+
+ /* If we didn't find any dynamic relocs in read-only sections, then
+ we'll be keeping the dynamic relocs and avoiding the copy reloc. */
+ if (p == NULL)
+ {
+ h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
+ return TRUE;
+ }
}
/* We must allocate the symbol in our .dynbss section, which will
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 elf_s390_relocate_section. */
-#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
+#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
((DYN) \
- && ((INFO)->shared \
+ && ((SHARED) \
|| ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
&& ((H)->dynindx != -1 \
|| ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
htab = elf_s390_hash_table (info);
if (htab->elf.dynamic_sections_created
- && h->plt.refcount > 0)
+ && h->plt.refcount > 0
+ && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
+ || h->root.type != bfd_link_hash_undefweak))
{
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic. */
return FALSE;
}
- if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
+ if (info->shared
+ || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
{
asection *s = htab->splt;
elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
}
- if (h->got.refcount > 0)
+ /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
+ the binary, we can optimize a bit. IE32 and GOTIE32 get converted
+ to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
+ we can save the dynamic TLS relocation. */
+ if (h->got.refcount > 0
+ && !info->shared
+ && h->dynindx == -1
+ && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
{
+ if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
+ /* For the GOTIE access without a literal pool entry the offset has
+ to be stored somewhere. The immediate value in the instruction
+ is not bit enough so the value is stored in the got. */
+ {
+ h->got.offset = htab->sgot->_raw_size;
+ htab->sgot->_raw_size += GOT_ENTRY_SIZE;
+ }
+ else
+ h->got.offset = (bfd_vma) -1;
+ }
+ else if (h->got.refcount > 0)
+ {
asection *s;
bfd_boolean dyn;
+ int tls_type = elf_s390_hash_entry(h)->tls_type;
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic. */
s = htab->sgot;
h->got.offset = s->_raw_size;
s->_raw_size += GOT_ENTRY_SIZE;
+ /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
+ if (tls_type == GOT_TLS_GD)
+ s->_raw_size += GOT_ENTRY_SIZE;
dyn = htab->elf.dynamic_sections_created;
- if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
+ /* R_390_TLS_IE32 needs one dynamic relocation,
+ R_390_TLS_GD32 needs one if local symbol and two if global. */
+ if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
+ || tls_type >= GOT_TLS_IE)
+ htab->srelgot->_raw_size += sizeof (Elf32_External_Rela);
+ else if (tls_type == GOT_TLS_GD)
+ htab->srelgot->_raw_size += 2 * sizeof (Elf32_External_Rela);
+ else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
+ || h->root.type != bfd_link_hash_undefweak)
+ && (info->shared
+ || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
htab->srelgot->_raw_size += sizeof (Elf32_External_Rela);
}
else
pp = &p->next;
}
}
+
+ /* Also discard relocs on undefined weak syms with non-default
+ visibility. */
+ if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
+ && h->root.type == bfd_link_hash_undefweak)
+ eh->dyn_relocs = NULL;
}
- else
+ else if (ELIMINATE_COPY_RELOCS)
{
/* For the non-shared case, discard space for relocs against
symbols which turn out to need copy relocs or are not
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
asection *sreloc = elf_section_data (p->sec)->sreloc;
+
sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
}
if (htab->elf.dynamic_sections_created)
{
/* Set the contents of the .interp section to the interpreter. */
- if (! info->shared)
+ if (info->executable)
{
s = bfd_get_section_by_name (dynobj, ".interp");
if (s == NULL)
{
bfd_signed_vma *local_got;
bfd_signed_vma *end_local_got;
+ char *local_tls_type;
bfd_size_type locsymcount;
Elf_Internal_Shdr *symtab_hdr;
asection *srela;
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
locsymcount = symtab_hdr->sh_info;
end_local_got = local_got + locsymcount;
+ local_tls_type = elf_s390_local_got_tls_type (ibfd);
s = htab->sgot;
srela = htab->srelgot;
- for (; local_got < end_local_got; ++local_got)
+ for (; local_got < end_local_got; ++local_got, ++local_tls_type)
{
if (*local_got > 0)
{
*local_got = s->_raw_size;
s->_raw_size += GOT_ENTRY_SIZE;
+ if (*local_tls_type == GOT_TLS_GD)
+ s->_raw_size += GOT_ENTRY_SIZE;
if (info->shared)
srela->_raw_size += sizeof (Elf32_External_Rela);
}
}
}
+ if (htab->tls_ldm_got.refcount > 0)
+ {
+ /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
+ relocs. */
+ htab->tls_ldm_got.offset = htab->sgot->_raw_size;
+ htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE;
+ htab->srelgot->_raw_size += sizeof (Elf32_External_Rela);
+ }
+ else
+ htab->tls_ldm_got.offset = -1;
+
/* Allocate global sym .plt and .got entries, and space for global
sym dynamic relocs. */
elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
}
else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
{
- if (s->_raw_size != 0 && s != htab->srelplt)
+ if (s->_raw_size != 0)
relocs = TRUE;
/* We use the reloc_count field as a counter if we need
#define add_dynamic_entry(TAG, VAL) \
bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
- if (! info->shared)
+ if (info->executable)
{
if (!add_dynamic_entry (DT_DEBUG, 0))
return FALSE;
}
if (relocs)
- {
- if (!add_dynamic_entry (DT_RELA, 0)
- || !add_dynamic_entry (DT_RELASZ, 0)
- || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
+ {
+ if (!add_dynamic_entry (DT_RELA, 0)
+ || !add_dynamic_entry (DT_RELASZ, 0)
+ || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
return FALSE;
/* If any dynamic relocs apply to a read-only section,
return TRUE;
}
+/* Return the base VMA address which should be subtracted from real addresses
+ when resolving @dtpoff relocation.
+ This is PT_TLS segment p_vaddr. */
+
+static bfd_vma
+dtpoff_base (info)
+ struct bfd_link_info *info;
+{
+ /* If tls_segment is NULL, we should have signalled an error already. */
+ if (elf_hash_table (info)->tls_segment == NULL)
+ return 0;
+ return elf_hash_table (info)->tls_segment->start;
+}
+
+/* Return the relocation value for @tpoff relocation
+ if STT_TLS virtual address is ADDRESS. */
+
+static bfd_vma
+tpoff (info, address)
+ struct bfd_link_info *info;
+ bfd_vma address;
+{
+ struct elf_link_tls_segment *tls_segment
+ = elf_hash_table (info)->tls_segment;
+
+ /* If tls_segment is NULL, we should have signalled an error already. */
+ if (tls_segment == NULL)
+ return 0;
+ return (align_power (tls_segment->size, tls_segment->align)
+ + tls_segment->start - address);
+}
+
+/* Complain if TLS instruction relocation is against an invalid
+ instruction. */
+
+static void
+invalid_tls_insn (input_bfd, input_section, rel)
+ bfd *input_bfd;
+ asection *input_section;
+ Elf_Internal_Rela *rel;
+{
+ reloc_howto_type *howto;
+
+ howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
+ (*_bfd_error_handler)
+ (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"),
+ bfd_archive_filename (input_bfd),
+ bfd_get_section_name (input_bfd, input_section),
+ (long) rel->r_offset,
+ howto->name);
+}
+
/* Relocate a 390 ELF section. */
static bfd_boolean
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
- if (info->relocateable)
+ if (info->relocatable)
return TRUE;
htab = elf_s390_hash_table (info);
bfd_vma relocation;
bfd_boolean unresolved_reloc;
bfd_reloc_status_type r;
+ int tls_type;
r_type = ELF32_R_TYPE (rel->r_info);
if (r_type == (int) R_390_GNU_VTINHERIT
- || r_type == (int) R_390_GNU_VTENTRY)
- continue;
+ || r_type == (int) R_390_GNU_VTENTRY)
+ continue;
if (r_type >= (int) R_390_max)
{
bfd_set_error (bfd_error_bad_value);
else if (h->root.type == bfd_link_hash_undefweak)
relocation = 0;
else if (info->shared
- && (!info->symbolic || info->allow_shlib_undefined)
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
relocation = 0;
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
- input_section, rel->r_offset,
+ input_section, rel->r_offset,
(!info->shared || info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return FALSE;
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;
}
/* Fall through. */
- case R_390_GOT12:
- case R_390_GOT16:
- case R_390_GOT32:
+ case R_390_GOT12:
+ case R_390_GOT16:
+ case R_390_GOT32:
case R_390_GOTENT:
- /* Relocation is to the entry for this symbol in the global
- offset table. */
+ /* Relocation is to the entry for this symbol in the global
+ offset table. */
if (htab->sgot == NULL)
abort ();
- if (h != NULL)
- {
+ if (h != NULL)
+ {
bfd_boolean dyn;
- off = h->got.offset;
+ off = h->got.offset;
dyn = htab->elf.dynamic_sections_created;
- if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
- || (info->shared
- && (info->symbolic
+ if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
+ || (info->shared
+ && (info->symbolic
|| h->dynindx == -1
|| (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
- {
- /* 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 2, we use the
- least significant bit to record whether we have
- initialized it already.
-
- When doing a dynamic link, we create a .rel.got
- relocation entry to initialize the value. This
- is done in the finish_dynamic_symbol routine. */
- if ((off & 1) != 0)
- off &= ~1;
- else
- {
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
+ || (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
+ 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 2, we use the
+ least significant bit to record whether we have
+ initialized it already.
+
+ When doing a dynamic link, we create a .rel.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,
htab->sgot->contents + off);
- h->got.offset |= 1;
- }
- }
+ h->got.offset |= 1;
+ }
+ }
else
unresolved_reloc = FALSE;
- }
- else
- {
+ }
+ else
+ {
if (local_got_offsets == NULL)
abort ();
- off = local_got_offsets[r_symndx];
+ 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,
+ /* 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,
htab->sgot->contents + off);
- if (info->shared)
- {
- asection *srelgot;
- Elf_Internal_Rela outrel;
+ if (info->shared)
+ {
+ asection *srelgot;
+ Elf_Internal_Rela outrel;
bfd_byte *loc;
- srelgot = htab->srelgot;
+ srelgot = htab->srelgot;
if (srelgot == NULL)
abort ();
- outrel.r_offset = (htab->sgot->output_section->vma
- + htab->sgot->output_offset
- + off);
- outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
+ outrel.r_offset = (htab->sgot->output_section->vma
+ + htab->sgot->output_offset
+ + off);
+ outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
outrel.r_addend = relocation;
loc = srelgot->contents;
loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
- bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
- }
+ bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
+ }
- local_got_offsets[r_symndx] |= 1;
- }
- }
+ local_got_offsets[r_symndx] |= 1;
+ }
+ }
if (off >= (bfd_vma) -2)
abort ();
relocation = htab->sgot->output_offset + off;
- /*
- * For @GOTENT the relocation is against the offset between
- * the instruction and the symbols entry in the GOT and not
- * between the start of the GOT and the symbols entry. We
- * add the vma of the GOT to get the correct value.
- */
+ /* For @GOTENT the relocation is against the offset between
+ the instruction and the symbols entry in the GOT and not
+ between the start of the GOT and the symbols entry. We
+ add the vma of the GOT to get the correct value. */
if ( r_type == R_390_GOTENT
|| r_type == R_390_GOTPLTENT)
relocation += htab->sgot->output_section->vma;
- break;
+ break;
case R_390_GOTOFF16:
- case R_390_GOTOFF32:
- /* Relocation is relative to the start of the global offset
- table. */
-
- /* 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
- permitted by the ABI, we might have to change this
- calculation. */
- relocation -= htab->sgot->output_section->vma;
- break;
-
- case R_390_GOTPC:
+ case R_390_GOTOFF32:
+ /* Relocation is relative to the start of the global offset
+ table. */
+
+ /* 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
+ permitted by the ABI, we might have to change this
+ calculation. */
+ relocation -= htab->sgot->output_section->vma;
+ break;
+
+ case R_390_GOTPC:
case R_390_GOTPCDBL:
- /* Use global offset table as symbol value. */
- relocation = htab->sgot->output_section->vma;
+ /* Use global offset table as symbol value. */
+ relocation = htab->sgot->output_section->vma;
unresolved_reloc = FALSE;
- break;
+ break;
- case R_390_PLT16DBL:
- case R_390_PLT32DBL:
- case R_390_PLT32:
- /* Relocation is to the entry for this symbol in the
- procedure linkage table. */
+ case R_390_PLT16DBL:
+ case R_390_PLT32DBL:
+ case R_390_PLT32:
+ /* Relocation is to the entry for this symbol in the
+ procedure linkage table. */
- /* Resolve a PLT32 reloc against a local symbol directly,
- without using the procedure linkage table. */
- if (h == NULL)
- break;
+ /* Resolve a PLT32 reloc against a local symbol directly,
+ without using the procedure linkage table. */
+ if (h == NULL)
+ break;
- if (h->plt.offset == (bfd_vma) -1
+ if (h->plt.offset == (bfd_vma) -1
|| htab->splt == NULL)
- {
- /* We didn't make a PLT entry for this symbol. This
- happens when statically linking PIC code, or when
- using -Bsymbolic. */
- break;
- }
-
- relocation = (htab->splt->output_section->vma
- + htab->splt->output_offset
- + h->plt.offset);
+ {
+ /* We didn't make a PLT entry for this symbol. This
+ happens when statically linking PIC code, or when
+ using -Bsymbolic. */
+ break;
+ }
+
+ relocation = (htab->splt->output_section->vma
+ + htab->splt->output_offset
+ + h->plt.offset);
unresolved_reloc = FALSE;
- break;
+ break;
case R_390_PLTOFF16:
case R_390_PLTOFF32:
- /* Relocation is to the entry for this symbol in the
- procedure linkage table relative to the start of the GOT. */
+ /* Relocation is to the entry for this symbol in the
+ procedure linkage table relative to the start of the GOT. */
/* 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->splt == NULL)
{
break;
}
- relocation = (htab->splt->output_section->vma
- + htab->splt->output_offset
- + h->plt.offset
+ relocation = (htab->splt->output_section->vma
+ + htab->splt->output_offset
+ + h->plt.offset
- htab->sgot->output_section->vma);
unresolved_reloc = FALSE;
- break;
-
- case R_390_8:
- case R_390_16:
- case R_390_32:
- case R_390_PC16:
- case R_390_PC16DBL:
- case R_390_PC32DBL:
- case R_390_PC32:
+ break;
+
+ case R_390_8:
+ case R_390_16:
+ case R_390_32:
+ case R_390_PC16:
+ case R_390_PC16DBL:
+ case R_390_PC32DBL:
+ case R_390_PC32:
/* r_symndx will be zero only for relocs against symbols
from removed linkonce sections, or sections discarded by
a linker script. */
- if (r_symndx == 0
- || (input_section->flags & SEC_ALLOC) == 0)
+ if (r_symndx == 0
+ || (input_section->flags & SEC_ALLOC) == 0)
break;
- if ((info->shared
+ if ((info->shared
+ && (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_PC16DBL
&& r_type != R_390_PC32DBL
&& (! info->symbolic
|| (h->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
- || (!info->shared
+ || (ELIMINATE_COPY_RELOCS
+ && !info->shared
&& h != NULL
&& h->dynindx != -1
&& (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
& ELF_LINK_HASH_DEF_REGULAR) == 0)
|| h->root.type == bfd_link_hash_undefweak
|| h->root.type == bfd_link_hash_undefined)))
- {
- Elf_Internal_Rela outrel;
- bfd_boolean skip, relocate;
+ {
+ Elf_Internal_Rela outrel;
+ bfd_boolean skip, relocate;
asection *sreloc;
bfd_byte *loc;
are copied into the output file to be resolved at run
time. */
- skip = FALSE;
- relocate = FALSE;
+ skip = FALSE;
+ relocate = FALSE;
outrel.r_offset =
_bfd_elf_section_offset (output_bfd, info, input_section,
skip = TRUE;
else if (outrel.r_offset == (bfd_vma) -2)
skip = TRUE, relocate = TRUE;
- outrel.r_offset += (input_section->output_section->vma
- + input_section->output_offset);
+ outrel.r_offset += (input_section->output_section->vma
+ + input_section->output_offset);
- if (skip)
+ if (skip)
memset (&outrel, 0, sizeof outrel);
- else if (h != NULL
+ else if (h != NULL
&& h->dynindx != -1
&& (r_type == R_390_PC16
|| r_type == R_390_PC16DBL
|| !info->symbolic
|| (h->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0))
- {
- outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
+ {
+ outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
outrel.r_addend = rel->r_addend;
- }
- else
- {
+ }
+ else
+ {
/* This symbol is local, or marked to become local. */
relocate = TRUE;
outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
outrel.r_addend = relocation + rel->r_addend;
- }
+ }
sreloc = elf_section_data (input_section)->sreloc;
if (sreloc == NULL)
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
- /* 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. */
- if (! relocate)
- continue;
- }
+ /* 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. */
+ if (! relocate)
+ continue;
+ }
break;
+ /* Relocations for tls literal pool entries. */
+ case R_390_TLS_IE32:
+ if (info->shared)
+ {
+ Elf_Internal_Rela outrel;
+ asection *sreloc;
+ bfd_byte *loc;
+
+ outrel.r_offset = rel->r_offset
+ + input_section->output_section->vma
+ + input_section->output_offset;
+ outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
+ sreloc = elf_section_data (input_section)->sreloc;
+ if (sreloc == NULL)
+ abort ();
+ loc = sreloc->contents;
+ loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
+ bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
+ }
+ /* Fall through. */
+
+ case R_390_TLS_GD32:
+ case R_390_TLS_GOTIE32:
+ r_type = elf_s390_tls_transition (info, r_type, h == NULL);
+ tls_type = GOT_UNKNOWN;
+ if (h == NULL && local_got_offsets)
+ tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
+ else if (h != NULL)
+ {
+ tls_type = elf_s390_hash_entry(h)->tls_type;
+ if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
+ r_type = R_390_TLS_LE32;
+ }
+ if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
+ r_type = R_390_TLS_IE32;
+
+ if (r_type == R_390_TLS_LE32)
+ {
+ /* This relocation gets optimized away by the local exec
+ access optimization. */
+ BFD_ASSERT (! unresolved_reloc);
+ bfd_put_32 (output_bfd, -tpoff (info, relocation),
+ contents + rel->r_offset);
+ continue;
+ }
+
+ if (htab->sgot == NULL)
+ abort ();
+
+ if (h != NULL)
+ off = h->got.offset;
+ else
+ {
+ if (local_got_offsets == NULL)
+ abort ();
+
+ off = local_got_offsets[r_symndx];
+ }
+
+ emit_tls_relocs:
+
+ if ((off & 1) != 0)
+ off &= ~1;
+ else
+ {
+ Elf_Internal_Rela outrel;
+ bfd_byte *loc;
+ int dr_type, indx;
+
+ if (htab->srelgot == NULL)
+ abort ();
+
+ outrel.r_offset = (htab->sgot->output_section->vma
+ + htab->sgot->output_offset + off);
+
+ indx = h && h->dynindx != -1 ? h->dynindx : 0;
+ if (r_type == R_390_TLS_GD32)
+ dr_type = R_390_TLS_DTPMOD;
+ else
+ dr_type = R_390_TLS_TPOFF;
+ if (dr_type == R_390_TLS_TPOFF && indx == 0)
+ outrel.r_addend = relocation - dtpoff_base (info);
+ else
+ outrel.r_addend = 0;
+ outrel.r_info = ELF32_R_INFO (indx, dr_type);
+ loc = htab->srelgot->contents;
+ loc += htab->srelgot->reloc_count++
+ * sizeof (Elf32_External_Rela);
+ bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
+
+ if (r_type == R_390_TLS_GD32)
+ {
+ if (indx == 0)
+ {
+ BFD_ASSERT (! unresolved_reloc);
+ bfd_put_32 (output_bfd,
+ relocation - dtpoff_base (info),
+ htab->sgot->contents + off + GOT_ENTRY_SIZE);
+ }
+ else
+ {
+ outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
+ outrel.r_offset += GOT_ENTRY_SIZE;
+ outrel.r_addend = 0;
+ htab->srelgot->reloc_count++;
+ loc += sizeof (Elf32_External_Rela);
+ bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
+ }
+ }
+
+ if (h != NULL)
+ h->got.offset |= 1;
+ else
+ local_got_offsets[r_symndx] |= 1;
+ }
+
+ if (off >= (bfd_vma) -2)
+ abort ();
+ if (r_type == ELF32_R_TYPE (rel->r_info))
+ {
+ relocation = htab->sgot->output_offset + off;
+ if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
+ relocation += htab->sgot->output_section->vma;
+ unresolved_reloc = FALSE;
+ }
+ else
+ {
+ bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
+ contents + rel->r_offset);
+ continue;
+ }
+ break;
+
+ case R_390_TLS_GOTIE12:
+ case R_390_TLS_IEENT:
+ if (h == NULL)
+ {
+ if (local_got_offsets == NULL)
+ abort();
+ off = local_got_offsets[r_symndx];
+ if (info->shared)
+ 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)
+ goto emit_tls_relocs;
+ }
+
+ if (htab->sgot == NULL)
+ abort ();
+
+ BFD_ASSERT (! unresolved_reloc);
+ bfd_put_32 (output_bfd, -tpoff (info, relocation),
+ htab->sgot->contents + off);
+ relocation = htab->sgot->output_offset + off;
+ if (r_type == R_390_TLS_IEENT)
+ relocation += htab->sgot->output_section->vma;
+ unresolved_reloc = FALSE;
+ break;
+
+ case R_390_TLS_LDM32:
+ if (! info->shared)
+ /* 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. */
+ continue;
+
+ if (htab->sgot == NULL)
+ abort ();
+
+ off = htab->tls_ldm_got.offset;
+ if (off & 1)
+ off &= ~1;
+ else
+ {
+ Elf_Internal_Rela outrel;
+ bfd_byte *loc;
+
+ if (htab->srelgot == NULL)
+ abort ();
+
+ outrel.r_offset = (htab->sgot->output_section->vma
+ + htab->sgot->output_offset + off);
+
+ bfd_put_32 (output_bfd, 0,
+ htab->sgot->contents + off + GOT_ENTRY_SIZE);
+ outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
+ outrel.r_addend = 0;
+ loc = htab->srelgot->contents;
+ loc += htab->srelgot->reloc_count++
+ * sizeof (Elf32_External_Rela);
+ bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
+ htab->tls_ldm_got.offset |= 1;
+ }
+ relocation = htab->sgot->output_offset + off;
+ unresolved_reloc = FALSE;
+ break;
+
+ case R_390_TLS_LE32:
+ if (info->shared)
+ {
+ /* Linking a shared library with non-fpic code requires
+ a R_390_TLS_TPOFF relocation. */
+ Elf_Internal_Rela outrel;
+ asection *sreloc;
+ bfd_byte *loc;
+ int indx;
+
+ outrel.r_offset = rel->r_offset
+ + input_section->output_section->vma
+ + input_section->output_offset;
+ if (h != NULL && h->dynindx != -1)
+ indx = h->dynindx;
+ else
+ indx = 0;
+ outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
+ if (indx == 0)
+ outrel.r_addend = relocation - dtpoff_base (info);
+ else
+ outrel.r_addend = 0;
+ sreloc = elf_section_data (input_section)->sreloc;
+ if (sreloc == NULL)
+ abort ();
+ loc = sreloc->contents;
+ loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
+ bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
+ }
+ else
+ {
+ BFD_ASSERT (! unresolved_reloc);
+ bfd_put_32 (output_bfd, -tpoff (info, relocation),
+ contents + rel->r_offset);
+ }
+ continue;
+
+ case R_390_TLS_LDO32:
+ if (info->shared || (input_section->flags & SEC_CODE) == 0)
+ relocation -= dtpoff_base (info);
+ else
+ /* When converting LDO to LE, we must negate. */
+ relocation = -tpoff (info, relocation);
+ break;
+
+ /* Relocations for tls instructions. */
+ case R_390_TLS_LOAD:
+ case R_390_TLS_GDCALL:
+ case R_390_TLS_LDCALL:
+ tls_type = GOT_UNKNOWN;
+ if (h == NULL && local_got_offsets)
+ tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
+ else if (h != NULL)
+ tls_type = elf_s390_hash_entry(h)->tls_type;
+
+ if (tls_type == GOT_TLS_GD)
+ continue;
+
+ if (r_type == R_390_TLS_LOAD)
+ {
+ if (!info->shared && (h == NULL || h->dynindx == -1))
+ {
+ /* IE->LE transition. Four valid cases:
+ l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
+ l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
+ l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
+ l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
+ unsigned int insn, ry;
+
+ insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
+ ry = 0;
+ if ((insn & 0xff00f000) == 0x58000000)
+ /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
+ ry = (insn & 0x000f0000);
+ else if ((insn & 0xff0f0000) == 0x58000000)
+ /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
+ ry = (insn & 0x0000f000) << 4;
+ else if ((insn & 0xff00f000) == 0x5800c000)
+ /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
+ ry = (insn & 0x000f0000);
+ else if ((insn & 0xff0f0000) == 0x580c0000)
+ /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
+ ry = (insn & 0x0000f000) << 4;
+ else
+ invalid_tls_insn (input_bfd, input_section, rel);
+ insn = 0x18000700 | (insn & 0x00f00000) | ry;
+ bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
+ }
+ }
+ else if (r_type == R_390_TLS_GDCALL)
+ {
+ unsigned int insn;
+
+ insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
+ if ((insn & 0xff000fff) != 0x4d000000)
+ invalid_tls_insn (input_bfd, input_section, rel);
+ if (!info->shared && (h == NULL || h->dynindx == -1))
+ /* GD->LE transition.
+ bas %r14,0(%rx,%r13) -> bc 0,0 */
+ insn = 0x47000000;
+ else
+ /* GD->IE transition.
+ bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
+ insn = 0x5822c000;
+ bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
+ }
+ else if (r_type == R_390_TLS_LDCALL)
+ {
+ if (!info->shared)
+ {
+ unsigned int insn;
+
+ insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
+ if ((insn & 0xff000fff) != 0x4d000000)
+ invalid_tls_insn (input_bfd, input_section, rel);
+ /* LD->LE transition.
+ bas %r14,0(%rx,%r13) -> bc 0,0 */
+ insn = 0x47000000;
+ bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
+ }
+ }
+ continue;
+
default:
break;
}
bfd_vma relative_offset;
/* This symbol has an entry in the procedure linkage table. Set
- it up. */
-
+ it up. */
if (h->dynindx == -1
|| htab->splt == NULL
|| htab->sgotplt == NULL
abort ();
/* Calc. index no.
- Current offset - size first entry / entry size. */
+ 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. */
+ addr & GOT addr. */
got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
/* S390 uses halfwords for relative branch calc! */
relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
- (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
+ (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
/* If offset is > 32768, branch to a previous branch
- 390 can only handle +-64 K jumps. */
+ 390 can only handle +-64 K jumps. */
if ( -32768 > (int) relative_offset )
- relative_offset =
- -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
+ relative_offset
+ = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
/* Fill in the entry in the procedure linkage table. */
if (!info->shared)
{
- bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
+ bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
htab->splt->contents + h->plt.offset);
bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
htab->splt->contents + h->plt.offset + 4);
}
/* Insert offset into reloc. table here. */
bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
- htab->splt->contents + h->plt.offset + 28);
+ htab->splt->contents + h->plt.offset + 28);
/* Fill in the entry in the global offset table.
- Points to instruction after GOT offset. */
+ Points to instruction after GOT offset. */
bfd_put_32 (output_bfd,
(htab->splt->output_section->vma
+ htab->splt->output_offset
}
}
- if (h->got.offset != (bfd_vma) -1)
+ if (h->got.offset != (bfd_vma) -1
+ && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
+ && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
+ && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
{
Elf_Internal_Rela rela;
bfd_byte *loc;
/* This symbol has an entry in the global offset table. Set it
- up. */
+ up. */
if (htab->sgot == NULL || htab->srelgot == NULL)
abort ();
BFD_ASSERT((h->got.offset & 1) != 0);
rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
rela.r_addend = (h->root.u.def.value
- + h->root.u.def.section->output_section->vma
- + h->root.u.def.section->output_offset);
- }
+ + h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset);
+ }
else
{
BFD_ASSERT((h->got.offset & 1) == 0);
bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
- rela.r_addend = 0;
- }
+ rela.r_addend = 0;
+ }
loc = htab->srelgot->contents;
loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
/* Fill in the special first entry in the procedure linkage table. */
if (htab->splt && htab->splt->_raw_size > 0)
{
- memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
- if (info->shared)
+ memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
+ if (info->shared)
{
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
- htab->splt->contents );
+ htab->splt->contents );
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
- htab->splt->contents +4 );
+ htab->splt->contents +4 );
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
- htab->splt->contents +8 );
+ htab->splt->contents +8 );
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
- htab->splt->contents +12 );
+ htab->splt->contents +12 );
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
- htab->splt->contents +16 );
- }
- else
- {
- bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
- htab->splt->contents );
- bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
- htab->splt->contents +4 );
- bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
- htab->splt->contents +8 );
- bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
- htab->splt->contents +12 );
- bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
- htab->splt->contents +16 );
- bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
- htab->splt->contents +20 );
- bfd_put_32 (output_bfd,
- htab->sgotplt->output_section->vma
+ htab->splt->contents +16 );
+ }
+ else
+ {
+ bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
+ htab->splt->contents );
+ bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
+ htab->splt->contents +4 );
+ bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
+ htab->splt->contents +8 );
+ bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
+ htab->splt->contents +12 );
+ bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
+ htab->splt->contents +16 );
+ bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
+ htab->splt->contents +20 );
+ bfd_put_32 (output_bfd,
+ htab->sgotplt->output_section->vma
+ htab->sgotplt->output_offset,
- htab->splt->contents + 24);
- }
+ htab->splt->contents + 24);
+ }
elf_section_data (htab->splt->output_section)
->this_hdr.sh_entsize = 4;
}
return TRUE;
}
-static bfd_boolean
-elf_s390_object_p (abfd)
- bfd *abfd;
-{
- return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
-}
-
static bfd_boolean
elf_s390_grok_prstatus (abfd, note)
bfd * abfd;
#define elf_backend_plt_header_size PLT_ENTRY_SIZE
#define elf_backend_rela_normal 1
-#define elf_info_to_howto elf_s390_info_to_howto
+#define elf_info_to_howto elf_s390_info_to_howto
#define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
#define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
#define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
-#define elf_backend_check_relocs elf_s390_check_relocs
+#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_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_gc_sweep_hook elf_s390_gc_sweep_hook
+#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
+#define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
#define elf_backend_reloc_type_class elf_s390_reloc_type_class
-#define elf_backend_relocate_section elf_s390_relocate_section
+#define elf_backend_relocate_section elf_s390_relocate_section
#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
#define elf_backend_reloc_type_class elf_s390_reloc_type_class
#define elf_backend_grok_prstatus elf_s390_grok_prstatus
-#define elf_backend_object_p elf_s390_object_p
+#define bfd_elf32_mkobject elf_s390_mkobject
+#define elf_backend_object_p elf_s390_object_p
#include "elf32-target.h"