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Unified Diff: bfd/elf64-s390.c

Issue 11969036: Merge GDB 7.5.1 (Closed) Base URL: http://git.chromium.org/native_client/nacl-gdb.git@master
Patch Set: Created 7 years, 11 months ago
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Index: bfd/elf64-s390.c
diff --git a/bfd/elf64-s390.c b/bfd/elf64-s390.c
index 7d3e8821d93843ae7834a5279ee5b73fafe985b1..8512fc0700beae889d0ec4de30c45eed75333ac2 100644
--- a/bfd/elf64-s390.c
+++ b/bfd/elf64-s390.c
@@ -1,6 +1,6 @@
/* IBM S/390-specific support for 64-bit ELF
Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
- 2010, 2011 Free Software Foundation, Inc.
+ 2010, 2011, 2012 Free Software Foundation, Inc.
Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
This file is part of BFD, the Binary File Descriptor library.
@@ -25,69 +25,19 @@
#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"
/* 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[] =
{
@@ -219,6 +169,9 @@ static reloc_howto_type elf_howto_table[] =
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),
+
};
/* GNU extension to record C++ vtable hierarchy. */
@@ -228,9 +181,8 @@ static reloc_howto_type elf64_s390_vtentry_howto =
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)
{
@@ -346,6 +298,8 @@ elf_s390_reloc_type_lookup (abfd, code)
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:
@@ -381,10 +335,9 @@ elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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)
@@ -410,15 +363,13 @@ elf_s390_info_to_howto (abfd, cache_ptr, dst)
/* 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;
@@ -427,15 +378,13 @@ s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
/* 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;
@@ -478,9 +427,7 @@ s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
}
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;
@@ -493,7 +440,7 @@ elf_s390_is_local_label_name (abfd, name)
/* 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
@@ -508,6 +455,8 @@ elf_s390_is_local_label_name (abfd, name)
#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
@@ -540,31 +489,33 @@ elf_s390_is_local_label_name (abfd, name)
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
-
- 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. */
-
-#define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000
-#define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310
-#define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004
-#define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10
-#define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c
-#define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4
-#define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000
-#define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000
+ Fixup at offset 28: 32 bit offset into .rela.plt
+
+ 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] =
+ {
+ 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
+ 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
+ 0x07, 0xf1, /* br %r1 */
+ 0x0d, 0x10, /* basr %r1,%r0 */
+ 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
+ 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
+ 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
+ };
/* 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:
@@ -577,34 +528,18 @@ elf_s390_is_local_label_name (abfd, name)
Fixup at offset 8: relative address to start of GOT. */
-#define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038
-#define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010
-#define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000
-#define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030
-#define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310
-#define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004
-#define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700
-#define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700
-
-/* The s390 linker needs to keep track of the number of relocs that it
- decides to copy as dynamic relocs in check_relocs for each symbol.
- This is so that it can later discard them if they are found to be
- unnecessary. We store the information in a field extending the
- regular ELF linker hash table. */
-
-struct elf_s390_dyn_relocs
-{
- struct elf_s390_dyn_relocs *next;
-
- /* The input section of the reloc. */
- asection *sec;
-
- /* Total number of relocs copied for the input section. */
- bfd_size_type count;
+static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
+ {
+ 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
+ 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
+ 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
+ 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
+ 0x07, 0xf1, /* br %r1 */
+ 0x07, 0x00, /* nopr %r0 */
+ 0x07, 0x00, /* nopr %r0 */
+ 0x07, 0x00 /* nopr %r0 */
+ };
- /* Number of pc-relative relocs copied for the input section. */
- bfd_size_type pc_count;
-};
/* s390 ELF linker hash entry. */
@@ -613,7 +548,7 @@ struct elf_s390_link_hash_entry
struct elf_link_hash_entry elf;
/* Track dynamic relocs copied for this symbol. */
- struct elf_s390_dyn_relocs *dyn_relocs;
+ struct elf_dyn_relocs *dyn_relocs;
/* Number of GOTPLT references for a function. */
bfd_signed_vma gotplt_refcount;
@@ -624,17 +559,43 @@ struct elf_s390_link_hash_entry
#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;
};
@@ -642,6 +603,9 @@ struct elf_s390_obj_tdata
#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)
@@ -658,8 +622,7 @@ elf_s390_mkobject (bfd *abfd)
}
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);
@@ -672,13 +635,9 @@ struct elf_s390_link_hash_table
struct elf_link_hash_table elf;
/* Short-cuts to get to dynamic linker sections. */
- asection *sgot;
- asection *sgotplt;
- asection *srelgot;
- asection *splt;
- asection *srelplt;
asection *sdynbss;
asection *srelbss;
+ asection *irelifunc;
union {
bfd_signed_vma refcount;
@@ -695,13 +654,15 @@ struct elf_s390_link_hash_table
(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. */
@@ -723,6 +684,8 @@ link_hash_newfunc (entry, table, string)
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;
@@ -731,8 +694,7 @@ link_hash_newfunc (entry, table, string)
/* 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);
@@ -749,11 +711,11 @@ elf_s390_link_hash_table_create (abfd)
return NULL;
}
- ret->sgot = NULL;
- ret->sgotplt = NULL;
- ret->srelgot = NULL;
- ret->splt = NULL;
- ret->srelplt = 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;
@@ -778,10 +740,10 @@ create_got_section (bfd *dynobj,
if (htab == NULL)
return FALSE;
- htab->sgot = bfd_get_section_by_name (dynobj, ".got");
- htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
- htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
- if (!htab->sgot || !htab->sgotplt || !htab->srelgot)
+ htab->elf.sgot = bfd_get_linker_section (dynobj, ".got");
+ htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
+ htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
+ if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
abort ();
return TRUE;
}
@@ -800,19 +762,19 @@ elf_s390_create_dynamic_sections (bfd *dynobj,
if (htab == NULL)
return FALSE;
- if (!htab->sgot && !create_got_section (dynobj, info))
+ if (!htab->elf.sgot && !create_got_section (dynobj, info))
return FALSE;
if (!_bfd_elf_create_dynamic_sections (dynobj, info))
return FALSE;
- htab->splt = bfd_get_section_by_name (dynobj, ".plt");
- htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
- htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
+ htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
+ htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
+ htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
if (!info->shared)
- htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
+ htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
- if (!htab->splt || !htab->srelplt || !htab->sdynbss
+ if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
|| (!info->shared && !htab->srelbss))
abort ();
@@ -822,9 +784,9 @@ elf_s390_create_dynamic_sections (bfd *dynobj,
/* 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;
@@ -835,14 +797,14 @@ elf_s390_copy_indirect_symbol (info, dir, ind)
{
if (edir->dyn_relocs != NULL)
{
- struct elf_s390_dyn_relocs **pp;
- struct elf_s390_dyn_relocs *p;
+ struct elf_dyn_relocs **pp;
+ struct elf_dyn_relocs *p;
/* Add reloc counts against the indirect sym to the direct sym
list. Merge any entries against the same section. */
for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
{
- struct elf_s390_dyn_relocs *q;
+ struct elf_dyn_relocs *q;
for (q = edir->dyn_relocs; q != NULL; q = q->next)
if (q->sec == p->sec)
@@ -886,10 +848,9 @@ elf_s390_copy_indirect_symbol (info, dir, ind)
}
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)
return r_type;
@@ -952,6 +913,7 @@ elf_s390_check_relocs (bfd *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);
@@ -964,7 +926,31 @@ elf_s390_check_relocs (bfd *abfd,
}
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 (!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];
@@ -1002,25 +988,18 @@ elf_s390_check_relocs (bfd *abfd,
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:
case R_390_GOTOFF64:
case R_390_GOTPC:
case R_390_GOTPCDBL:
- if (htab->sgot == NULL)
+ if (htab->elf.sgot == NULL)
{
if (htab->elf.dynobj == NULL)
htab->elf.dynobj = abfd;
@@ -1029,6 +1008,25 @@ elf_s390_check_relocs (bfd *abfd,
}
}
+ 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:
@@ -1036,7 +1034,10 @@ elf_s390_check_relocs (bfd *abfd,
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_PLT16DBL:
@@ -1183,7 +1184,7 @@ elf_s390_check_relocs (bfd *abfd,
case R_390_PC32:
case R_390_PC32DBL:
case R_390_PC64:
- if (h != NULL && !info->shared)
+ if (h != NULL)
{
/* If this reloc is in a read-only section, we might
need a copy reloc. We can't check reliably at this
@@ -1193,9 +1194,12 @@ elf_s390_check_relocs (bfd *abfd,
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 (!info->shared)
+ {
+ /* 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
@@ -1237,8 +1241,8 @@ elf_s390_check_relocs (bfd *abfd,
&& (h->root.type == bfd_link_hash_defweak
|| !h->def_regular)))
{
- struct elf_s390_dyn_relocs *p;
- struct elf_s390_dyn_relocs **head;
+ struct elf_dyn_relocs *p;
+ struct elf_dyn_relocs **head;
/* We must copy these reloc types into the output file.
Create a reloc section in dynobj and make room for
@@ -1268,7 +1272,6 @@ elf_s390_check_relocs (bfd *abfd,
easily. Oh well. */
asection *s;
void *vpp;
- Elf_Internal_Sym *isym;
isym = bfd_sym_from_r_symndx (&htab->sym_cache,
abfd, r_symndx);
@@ -1280,14 +1283,14 @@ elf_s390_check_relocs (bfd *abfd,
s = sec;
vpp = &elf_section_data (s)->local_dynrel;
- head = (struct elf_s390_dyn_relocs **) vpp;
+ head = (struct elf_dyn_relocs **) vpp;
}
p = *head;
if (p == NULL || p->sec != sec)
{
bfd_size_type amt = sizeof *p;
- p = ((struct elf_s390_dyn_relocs *)
+ p = ((struct elf_dyn_relocs *)
bfd_alloc (htab->elf.dynobj, amt));
if (p == NULL)
return FALSE;
@@ -1391,8 +1394,8 @@ elf_s390_gc_sweep_hook (bfd *abfd,
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;
+ struct elf_dyn_relocs **pp;
+ struct elf_dyn_relocs *p;
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
@@ -1408,6 +1411,23 @@ elf_s390_gc_sweep_hook (bfd *abfd,
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);
@@ -1513,8 +1533,7 @@ elf_s390_gc_sweep_hook (bfd *abfd,
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;
@@ -1541,6 +1560,10 @@ elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
struct elf_s390_link_hash_table *htab;
asection *s;
+ /* STT_GNU_IFUNC symbol must go through PLT. */
+ if (s390_is_ifunc_symbol_p (h))
+ 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
(although we could actually do it here). */
@@ -1611,7 +1634,7 @@ elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
if (ELIMINATE_COPY_RELOCS)
{
struct elf_s390_link_hash_entry * eh;
- struct elf_s390_dyn_relocs *p;
+ struct elf_dyn_relocs *p;
eh = (struct elf_s390_link_hash_entry *) h;
for (p = eh->dyn_relocs; p != NULL; p = p->next)
@@ -1630,13 +1653,6 @@ elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
}
}
- if (h->size == 0)
- {
- (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
- h->root.root.string);
- return TRUE;
- }
-
/* We must allocate the symbol in our .dynbss section, which will
become part of the .bss section of the executable. There will be
an entry for this symbol in the .dynsym section. The dynamic
@@ -1654,7 +1670,7 @@ elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
/* 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_ALLOC) != 0)
+ if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
{
htab->srelbss->size += sizeof (Elf64_External_Rela);
h->needs_copy = 1;
@@ -1674,8 +1690,8 @@ allocate_dynrelocs (struct elf_link_hash_entry *h,
{
struct bfd_link_info *info;
struct elf_s390_link_hash_table *htab;
- struct elf_s390_link_hash_entry *eh;
- struct elf_s390_dyn_relocs *p;
+ 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)
return TRUE;
@@ -1685,8 +1701,13 @@ allocate_dynrelocs (struct elf_link_hash_entry *h,
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,
+ &eh->dyn_relocs);
+ 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. */
@@ -1700,7 +1721,7 @@ allocate_dynrelocs (struct elf_link_hash_entry *h,
if (info->shared
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
{
- asection *s = htab->splt;
+ asection *s = htab->elf.splt;
/* If this is the first .plt entry, make room for the special
first entry. */
@@ -1726,10 +1747,10 @@ allocate_dynrelocs (struct elf_link_hash_entry *h,
/* We also need to make an entry in the .got.plt section, which
will be placed in the .got section by the linker script. */
- htab->sgotplt->size += GOT_ENTRY_SIZE;
+ htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
/* We also need to make an entry in the .rela.plt section. */
- htab->srelplt->size += sizeof (Elf64_External_Rela);
+ htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
}
else
{
@@ -1759,8 +1780,8 @@ allocate_dynrelocs (struct elf_link_hash_entry *h,
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->size;
- htab->sgot->size += GOT_ENTRY_SIZE;
+ h->got.offset = htab->elf.sgot->size;
+ htab->elf.sgot->size += GOT_ENTRY_SIZE;
}
else
h->got.offset = (bfd_vma) -1;
@@ -1780,7 +1801,7 @@ allocate_dynrelocs (struct elf_link_hash_entry *h,
return FALSE;
}
- s = htab->sgot;
+ s = htab->elf.sgot;
h->got.offset = s->size;
s->size += GOT_ENTRY_SIZE;
/* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
@@ -1791,19 +1812,18 @@ allocate_dynrelocs (struct elf_link_hash_entry *h,
R_390_TLS_GD64 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->size += sizeof (Elf64_External_Rela);
+ htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
else if (tls_type == GOT_TLS_GD)
- htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
+ 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
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
- htab->srelgot->size += sizeof (Elf64_External_Rela);
+ 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;
@@ -1817,7 +1837,7 @@ allocate_dynrelocs (struct elf_link_hash_entry *h,
{
if (SYMBOL_CALLS_LOCAL (info, h))
{
- struct elf_s390_dyn_relocs **pp;
+ struct elf_dyn_relocs **pp;
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
{
@@ -1894,12 +1914,10 @@ allocate_dynrelocs (struct elf_link_hash_entry *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_s390_dyn_relocs *p;
+ struct elf_dyn_relocs *p;
eh = (struct elf_s390_link_hash_entry *) h;
for (p = eh->dyn_relocs; p != NULL; p = p->next)
@@ -1944,7 +1962,7 @@ elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
/* Set the contents of the .interp section to the interpreter. */
if (info->executable)
{
- 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;
@@ -1962,13 +1980,15 @@ elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
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;
for (s = ibfd->sections; s != NULL; s = s->next)
{
- struct elf_s390_dyn_relocs *p;
+ struct elf_dyn_relocs *p;
for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
{
@@ -1998,8 +2018,8 @@ elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
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;
+ s = htab->elf.sgot;
+ srela = htab->elf.srelgot;
for (; local_got < end_local_got; ++local_got, ++local_tls_type)
{
if (*local_got > 0)
@@ -2014,22 +2034,36 @@ elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
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 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
relocs. */
- htab->tls_ldm_got.offset = htab->sgot->size;
- htab->sgot->size += 2 * GOT_ENTRY_SIZE;
- htab->srelgot->size += sizeof (Elf64_External_Rela);
+ htab->tls_ldm_got.offset = htab->elf.sgot->size;
+ htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
+ htab->elf.srelgot->size += sizeof (Elf64_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);
+ elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
/* We now have determined the sizes of the various dynamic sections.
Allocate memory for them. */
@@ -2039,17 +2073,20 @@ elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
if ((s->flags & SEC_LINKER_CREATED) == 0)
continue;
- if (s == htab->splt
- || s == htab->sgot
- || s == htab->sgotplt
- || s == htab->sdynbss)
+ if (s == htab->elf.splt
+ || s == htab->elf.sgot
+ || s == htab->elf.sgotplt
+ || s == htab->sdynbss
+ || s == htab->elf.iplt
+ || s == htab->elf.igotplt
+ || s == htab->irelifunc)
{
/* Strip this section if we don't need it; see the
comment below. */
}
else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
{
- if (s->size != 0 && s != htab->srelplt)
+ if (s->size != 0 && s != htab->elf.srelplt)
relocs = TRUE;
/* We use the reloc_count field as a counter if we need
@@ -2107,7 +2144,7 @@ elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
return FALSE;
}
- if (htab->splt->size != 0)
+ if (htab->elf.splt->size != 0)
{
if (!add_dynamic_entry (DT_PLTGOT, 0)
|| !add_dynamic_entry (DT_PLTRELSZ, 0)
@@ -2127,7 +2164,7 @@ elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
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)
{
@@ -2146,8 +2183,7 @@ elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
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)
@@ -2159,9 +2195,7 @@ dtpoff_base (info)
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);
@@ -2175,10 +2209,9 @@ tpoff (info, address)
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;
@@ -2236,6 +2269,7 @@ elf_s390_relocate_section (bfd *output_bfd,
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
@@ -2258,7 +2292,55 @@ elf_s390_relocate_section (bfd *output_bfd,
{
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_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
{
@@ -2270,9 +2352,9 @@ elf_s390_relocate_section (bfd *output_bfd,
unresolved_reloc, warned);
}
- 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)
continue;
@@ -2298,18 +2380,28 @@ elf_s390_relocate_section (bfd *output_bfd,
{
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 4, 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->sgot->output_section->vma;
break;
}
/* Fall through. */
@@ -2322,7 +2414,7 @@ elf_s390_relocate_section (bfd *output_bfd,
case R_390_GOTENT:
/* Relocation is to the entry for this symbol in the global
offset table. */
- if (htab->sgot == NULL)
+ if (base_got == NULL)
abort ();
if (h != NULL)
@@ -2331,11 +2423,29 @@ elf_s390_relocate_section (bfd *output_bfd,
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, info->shared, h)
+ || (info->shared
+ && 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
@@ -2354,7 +2464,7 @@ elf_s390_relocate_section (bfd *output_bfd,
else
{
bfd_put_64 (output_bfd, relocation,
- htab->sgot->contents + off);
+ base_got->contents + off);
h->got.offset |= 1;
}
}
@@ -2376,7 +2486,7 @@ elf_s390_relocate_section (bfd *output_bfd,
else
{
bfd_put_64 (output_bfd, relocation,
- htab->sgot->contents + off);
+ htab->elf.sgot->contents + off);
if (info->shared)
{
@@ -2384,12 +2494,12 @@ elf_s390_relocate_section (bfd *output_bfd,
Elf_Internal_Rela outrel;
bfd_byte *loc;
- s = htab->srelgot;
+ s = htab->elf.srelgot;
if (s == NULL)
abort ();
- outrel.r_offset = (htab->sgot->output_section->vma
- + htab->sgot->output_offset
+ outrel.r_offset = (htab->elf.sgot->output_section->vma
+ + htab->elf.sgot->output_offset
+ off);
outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
outrel.r_addend = relocation;
@@ -2405,7 +2515,7 @@ elf_s390_relocate_section (bfd *output_bfd,
if (off >= (bfd_vma) -2)
abort ();
- relocation = htab->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
@@ -2413,7 +2523,7 @@ elf_s390_relocate_section (bfd *output_bfd,
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;
+ relocation += base_got->output_section->vma;
break;
@@ -2428,13 +2538,13 @@ elf_s390_relocate_section (bfd *output_bfd,
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;
+ relocation -= htab->elf.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;
+ relocation = htab->elf.sgot->output_section->vma;
unresolved_reloc = FALSE;
break;
@@ -2451,17 +2561,21 @@ elf_s390_relocate_section (bfd *output_bfd,
break;
if (h->plt.offset == (bfd_vma) -1
- || htab->splt == NULL)
+ || (htab->elf.splt == NULL && htab->elf.iplt == 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);
+ 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;
@@ -2475,16 +2589,22 @@ elf_s390_relocate_section (bfd *output_bfd,
this symbol resolve the symbol directly. */
if ( h == NULL
|| h->plt.offset == (bfd_vma) -1
- || htab->splt == NULL)
+ || htab->elf.splt == NULL)
{
- relocation -= htab->sgot->output_section->vma;
+ relocation -= htab->elf.sgot->output_section->vma;
break;
}
- relocation = (htab->splt->output_section->vma
- + htab->splt->output_offset
- + h->plt.offset
- - htab->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;
@@ -2497,6 +2617,68 @@ elf_s390_relocate_section (bfd *output_bfd,
case R_390_PC32:
case R_390_PC32DBL:
case R_390_PC64:
+
+ if (h != NULL
+ && s390_is_ifunc_symbol_p (h)
+ && h->def_regular)
+ {
+ if (!info->shared || !h->non_got_ref)
+ {
+ /* For a non-shared object STT_GNU_IFUNC symbol must
+ go through PLT. */
+ 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
+ || info->executable)
+ {
+ /* 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;
@@ -2667,7 +2849,7 @@ elf_s390_relocate_section (bfd *output_bfd,
continue;
}
- if (htab->sgot == NULL)
+ if (htab->elf.sgot == NULL)
abort ();
if (h != NULL)
@@ -2690,11 +2872,11 @@ elf_s390_relocate_section (bfd *output_bfd,
bfd_byte *loc;
int dr_type, indx;
- if (htab->srelgot == NULL)
+ if (htab->elf.srelgot == NULL)
abort ();
- outrel.r_offset = (htab->sgot->output_section->vma
- + htab->sgot->output_offset + off);
+ outrel.r_offset = (htab->elf.sgot->output_section->vma
+ + htab->elf.sgot->output_offset + off);
indx = h && h->dynindx != -1 ? h->dynindx : 0;
if (r_type == R_390_TLS_GD64)
@@ -2706,8 +2888,8 @@ elf_s390_relocate_section (bfd *output_bfd,
else
outrel.r_addend = 0;
outrel.r_info = ELF64_R_INFO (indx, dr_type);
- loc = htab->srelgot->contents;
- loc += htab->srelgot->reloc_count++
+ loc = htab->elf.srelgot->contents;
+ loc += htab->elf.srelgot->reloc_count++
* sizeof (Elf64_External_Rela);
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
@@ -2718,14 +2900,14 @@ elf_s390_relocate_section (bfd *output_bfd,
BFD_ASSERT (! unresolved_reloc);
bfd_put_64 (output_bfd,
relocation - dtpoff_base (info),
- htab->sgot->contents + off + GOT_ENTRY_SIZE);
+ htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
}
else
{
outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
outrel.r_offset += GOT_ENTRY_SIZE;
outrel.r_addend = 0;
- htab->srelgot->reloc_count++;
+ htab->elf.srelgot->reloc_count++;
loc += sizeof (Elf64_External_Rela);
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
}
@@ -2741,14 +2923,14 @@ elf_s390_relocate_section (bfd *output_bfd,
abort ();
if (r_type == ELF64_R_TYPE (rel->r_info))
{
- relocation = htab->sgot->output_offset + off;
+ relocation = htab->elf.sgot->output_offset + off;
if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
- relocation += htab->sgot->output_section->vma;
+ relocation += htab->elf.sgot->output_section->vma;
unresolved_reloc = FALSE;
}
else
{
- bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
+ bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
contents + rel->r_offset);
continue;
}
@@ -2773,15 +2955,15 @@ elf_s390_relocate_section (bfd *output_bfd,
goto emit_tls_relocs;
}
- if (htab->sgot == NULL)
+ if (htab->elf.sgot == NULL)
abort ();
BFD_ASSERT (! unresolved_reloc);
bfd_put_64 (output_bfd, -tpoff (info, relocation),
- htab->sgot->contents + off);
- relocation = htab->sgot->output_offset + off;
+ htab->elf.sgot->contents + off);
+ relocation = htab->elf.sgot->output_offset + off;
if (r_type == R_390_TLS_IEENT)
- relocation += htab->sgot->output_section->vma;
+ relocation += htab->elf.sgot->output_section->vma;
unresolved_reloc = FALSE;
break;
@@ -2792,7 +2974,7 @@ elf_s390_relocate_section (bfd *output_bfd,
and the value will turn out zero. */
continue;
- if (htab->sgot == NULL)
+ if (htab->elf.sgot == NULL)
abort ();
off = htab->tls_ldm_got.offset;
@@ -2803,23 +2985,23 @@ elf_s390_relocate_section (bfd *output_bfd,
Elf_Internal_Rela outrel;
bfd_byte *loc;
- if (htab->srelgot == NULL)
+ if (htab->elf.srelgot == NULL)
abort ();
- outrel.r_offset = (htab->sgot->output_section->vma
- + htab->sgot->output_offset + off);
+ outrel.r_offset = (htab->elf.sgot->output_section->vma
+ + htab->elf.sgot->output_offset + off);
bfd_put_64 (output_bfd, 0,
- htab->sgot->contents + off + GOT_ENTRY_SIZE);
+ htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
outrel.r_addend = 0;
- loc = htab->srelgot->contents;
- loc += htab->srelgot->reloc_count++
+ loc = htab->elf.srelgot->contents;
+ loc += htab->elf.srelgot->reloc_count++
* sizeof (Elf64_External_Rela);
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
htab->tls_ldm_got.offset |= 1;
}
- relocation = htab->sgot->output_offset + off;
+ relocation = htab->elf.sgot->output_offset + off;
unresolved_reloc = FALSE;
break;
@@ -2861,7 +3043,7 @@ elf_s390_relocate_section (bfd *output_bfd,
continue;
case R_390_TLS_LDO64:
- if (info->shared)
+ if (info->shared || (input_section->flags & SEC_DEBUGGING))
relocation -= dtpoff_base (info);
else
/* When converting LDO to LE, we must negate. */
@@ -2982,6 +3164,8 @@ elf_s390_relocate_section (bfd *output_bfd,
howto->name,
h->root.root.string);
+ do_relocation:
+
if (r_type == R_390_20
|| r_type == R_390_GOT20
|| r_type == R_390_GOTPLT20
@@ -3038,6 +3222,92 @@ elf_s390_relocate_section (bfd *output_bfd,
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
+ || ((info->executable
+ || 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. */
@@ -3048,6 +3318,7 @@ elf_s390_finish_dynamic_symbol (bfd *output_bfd,
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)
@@ -3062,78 +3333,82 @@ elf_s390_finish_dynamic_symbol (bfd *output_bfd,
/* This symbol has an entry in the procedure linkage table. Set
it up. */
+ if (s390_is_ifunc_symbol_p (h))
+ {
+ /* If we can resolve the IFUNC symbol locally we generate an
+ IRELATIVE reloc. */
+ 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);
+ ;
+ /* Fallthrough. 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->splt == NULL
- || htab->sgotplt == NULL
- || htab->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. */
- 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);
- bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
- htab->splt->contents + h->plt.offset + 8);
- bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
- htab->splt->contents + h->plt.offset + 12);
- bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
- htab->splt->contents + h->plt.offset + 16);
- bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
- htab->splt->contents + h->plt.offset + 20);
- bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
- htab->splt->contents + h->plt.offset + 24);
- bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
- htab->splt->contents + h->plt.offset + 28);
- /* Fixup the relative address to the GOT entry */
- bfd_put_32 (output_bfd,
- (htab->sgotplt->output_section->vma +
- htab->sgotplt->output_offset + got_offset
- - (htab->splt->output_section->vma + h->plt.offset))/2,
- htab->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->splt->contents + h->plt.offset + 24);
- /* Fixup offset into symbol table */
- bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
- htab->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->splt->output_section->vma
- + htab->splt->output_offset
- + h->plt.offset
- + 14),
- htab->sgotplt->contents + got_offset);
-
- /* Fill in the entry in the .rela.plt section. */
- rela.r_offset = (htab->sgotplt->output_section->vma
- + htab->sgotplt->output_offset
- + got_offset);
- rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
- rela.r_addend = 0;
- loc = htab->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;
+ }
}
}
@@ -3147,21 +3422,44 @@ elf_s390_finish_dynamic_symbol (bfd *output_bfd,
/* This symbol has an entry in the global offset table. Set it
up. */
- if (htab->sgot == NULL || htab->srelgot == NULL)
+ if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
abort ();
- rela.r_offset = (htab->sgot->output_section->vma
- + htab->sgot->output_offset
+ rela.r_offset = (htab->elf.sgot->output_section->vma
+ + 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
+ if (h->def_regular && s390_is_ifunc_symbol_p (h))
+ {
+ if (info->shared)
+ {
+ /* 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 (info->shared
&& 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)
return FALSE;
BFD_ASSERT((h->got.offset & 1) != 0);
@@ -3173,13 +3471,14 @@ elf_s390_finish_dynamic_symbol (bfd *output_bfd,
else
{
BFD_ASSERT((h->got.offset & 1) == 0);
- bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
+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;
}
- loc = htab->srelgot->contents;
- loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
+ loc = htab->elf.srelgot->contents;
+ loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
}
@@ -3219,8 +3518,7 @@ elf_s390_finish_dynamic_symbol (bfd *output_bfd,
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 Elf_Internal_Rela *rela)
{
switch ((int) ELF64_R_TYPE (rela->r_info))
{
@@ -3244,19 +3542,21 @@ elf_s390_finish_dynamic_sections (bfd *output_bfd,
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)
{
Elf64_External_Dyn *dyncon, *dynconend;
- if (sdyn == NULL || htab->sgot == NULL)
+ if (sdyn == NULL || htab->elf.sgot == NULL)
abort ();
dyncon = (Elf64_External_Dyn *) sdyn->contents;
@@ -3274,15 +3574,15 @@ elf_s390_finish_dynamic_sections (bfd *output_bfd,
continue;
case DT_PLTGOT:
- dyn.d_un.d_ptr = htab->sgot->output_section->vma;
+ dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
break;
case DT_JMPREL:
- dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
+ dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
break;
case DT_PLTRELSZ:
- s = htab->srelplt->output_section;
+ s = htab->elf.srelplt->output_section;
dyn.d_un.d_val = s->size;
break;
@@ -3294,7 +3594,7 @@ elf_s390_finish_dynamic_sections (bfd *output_bfd,
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->srelplt->output_section;
+ s = htab->elf.srelplt->output_section;
dyn.d_un.d_val -= s->size;
break;
}
@@ -3303,52 +3603,72 @@ elf_s390_finish_dynamic_sections (bfd *output_bfd,
}
/* Fill in the special first entry in the procedure linkage table. */
- if (htab->splt && htab->splt->size > 0)
+ if (htab->elf.splt && htab->elf.splt->size > 0)
{
/* fill in blueprint for plt 0 entry */
- 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_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, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
- htab->splt->contents + 24);
- bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
- htab->splt->contents + 28 );
+ memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
+ PLT_FIRST_ENTRY_SIZE);
/* Fixup relative address to start of GOT */
bfd_put_32 (output_bfd,
- (htab->sgotplt->output_section->vma +
- htab->sgotplt->output_offset
- - htab->splt->output_section->vma - 6)/2,
- htab->splt->contents + 8);
+ (htab->elf.sgotplt->output_section->vma +
+ htab->elf.sgotplt->output_offset
+ - htab->elf.splt->output_section->vma - 6)/2,
+ htab->elf.splt->contents + 8);
}
- elf_section_data (htab->splt->output_section)
+ elf_section_data (htab->elf.splt->output_section)
->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
}
- if (htab->sgotplt)
+ if (htab->elf.sgotplt)
{
/* Fill in the first three entries in the global offset table. */
- if (htab->sgotplt->size > 0)
+ if (htab->elf.sgotplt->size > 0)
{
bfd_put_64 (output_bfd,
(sdyn == NULL ? (bfd_vma) 0
: sdyn->output_section->vma + sdyn->output_offset),
- htab->sgotplt->contents);
+ htab->elf.sgotplt->contents);
/* One entry for shared object struct ptr. */
- bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
+ 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->sgotplt->contents + 12);
+ bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 12);
}
- elf_section_data (htab->sgot->output_section)
+ 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;
}
@@ -3362,7 +3682,6 @@ elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
}
-
/* Why was the hash table entry size definition changed from
ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
this is the only reason for the s390_elf64_size_info structure. */
@@ -3437,8 +3756,24 @@ const struct elf_size_info s390_elf64_size_info =
#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_plt_sym_val elf_s390_plt_sym_val
+#define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
#define bfd_elf64_mkobject elf_s390_mkobject
#define elf_backend_object_p elf_s390_object_p
+/* Enable ELF64 archive functions. */
+#define bfd_elf64_archive_functions
+extern bfd_boolean bfd_elf64_archive_slurp_armap (bfd *);
+extern bfd_boolean bfd_elf64_archive_write_armap (bfd *, unsigned int, struct orl *, unsigned int, int);
+
+#define bfd_elf64_archive_slurp_extended_name_table _bfd_archive_coff_slurp_extended_name_table
+#define bfd_elf64_archive_construct_extended_name_table _bfd_archive_coff_construct_extended_name_table
+#define bfd_elf64_archive_truncate_arname _bfd_archive_coff_truncate_arname
+#define bfd_elf64_archive_read_ar_hdr _bfd_archive_coff_read_ar_hdr
+#define bfd_elf64_archive_write_ar_hdr _bfd_archive_coff_write_ar_hdr
+#define bfd_elf64_archive_openr_next_archived_file _bfd_archive_coff_openr_next_archived_file
+#define bfd_elf64_archive_get_elt_at_index _bfd_archive_coff_get_elt_at_index
+#define bfd_elf64_archive_generic_stat_arch_elt _bfd_archive_coff_generic_stat_arch_elt
+#define bfd_elf64_archive_update_armap_timestamp _bfd_archive_coff_update_armap_timestamp
+
#include "elf64-target.h"
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