X-Git-Url: http://drtracing.org/?a=blobdiff_plain;ds=sidebyside;f=bfd%2Felf64-s390.c;h=cf174f8675deed56e1e95ae14dc95d5514621eb3;hb=3860d2b4b72feeef4cf045c6c9907a0476f46f3d;hp=2c3246fb361b0a945c19d4455940e4e1cf5df311;hpb=075154045b3a1c940a448846723be16e3c7e0930;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/elf64-s390.c b/bfd/elf64-s390.c index 2c3246fb36..cf174f8675 100644 --- a/bfd/elf64-s390.c +++ b/bfd/elf64-s390.c @@ -1,12 +1,12 @@ /* IBM S/390-specific support for 64-bit ELF - Copyright 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. + Copyright (C) 2000-2016 Free Software Foundation, Inc. Contributed Martin Schwidefsky (schwidefsky@de.ibm.com). This file is part of BFD, the Binary File Descriptor library. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or + the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, @@ -16,91 +16,33 @@ You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA - 02111-1307, USA. */ + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA + 02110-1301, USA. */ -#include "bfd.h" #include "sysdep.h" +#include "bfd.h" #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 ((const struct elf_backend_data *, 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 *)); -static asection *elf_s390_gc_mark_hook - PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, - struct elf_link_hash_entry *, Elf_Internal_Sym *)); -static bfd_boolean elf_s390_gc_sweep_hook - 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_mkobject - PARAMS ((bfd *)); -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[] = { HOWTO (R_390_NONE, /* type */ 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ + 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */ 0, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ @@ -226,6 +168,16 @@ 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), + HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE), + HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE), + HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE), + HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE), }; /* GNU extension to record C++ vtable hierarchy. */ @@ -235,9 +187,8 @@ 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) { @@ -277,10 +228,18 @@ elf_s390_reloc_type_lookup (abfd, code) return &elf_howto_table[(int) R_390_GOT16]; case BFD_RELOC_16_PCREL: return &elf_howto_table[(int) R_390_PC16]; + case BFD_RELOC_390_PC12DBL: + return &elf_howto_table[(int) R_390_PC12DBL]; + case BFD_RELOC_390_PLT12DBL: + return &elf_howto_table[(int) R_390_PLT12DBL]; case BFD_RELOC_390_PC16DBL: return &elf_howto_table[(int) R_390_PC16DBL]; case BFD_RELOC_390_PLT16DBL: return &elf_howto_table[(int) R_390_PLT16DBL]; + case BFD_RELOC_390_PC24DBL: + return &elf_howto_table[(int) R_390_PC24DBL]; + case BFD_RELOC_390_PLT24DBL: + return &elf_howto_table[(int) R_390_PLT24DBL]; case BFD_RELOC_390_PC32DBL: return &elf_howto_table[(int) R_390_PC32DBL]; case BFD_RELOC_390_PLT32DBL: @@ -353,6 +312,8 @@ 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: @@ -363,16 +324,37 @@ elf_s390_reloc_type_lookup (abfd, code) return 0; } +static reloc_howto_type * +elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, + const char *r_name) +{ + unsigned int i; + + for (i = 0; + i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); + i++) + if (elf_howto_table[i].name != NULL + && strcasecmp (elf_howto_table[i].name, r_name) == 0) + return &elf_howto_table[i]; + + if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0) + return &elf64_s390_vtinherit_howto; + if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0) + return &elf64_s390_vtentry_howto; + + return NULL; +} + /* We need to use ELF64_R_TYPE so we have our own copy of this function, 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) { - switch (ELF64_R_TYPE(dst->r_info)) + unsigned int r_type = ELF64_R_TYPE(dst->r_info); + switch (r_type) { case R_390_GNU_VTINHERIT: cache_ptr->howto = &elf64_s390_vtinherit_howto; @@ -383,22 +365,25 @@ elf_s390_info_to_howto (abfd, cache_ptr, dst) break; default: - BFD_ASSERT (ELF64_R_TYPE(dst->r_info) < (unsigned int) R_390_max); - cache_ptr->howto = &elf_howto_table[ELF64_R_TYPE(dst->r_info)]; + if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0])) + { + (*_bfd_error_handler) (_("%B: invalid relocation type %d"), + abfd, (int) r_type); + r_type = R_390_NONE; + } + cache_ptr->howto = &elf_howto_table[r_type]; } } /* A relocation function which doesn't do anything. */ static bfd_reloc_status_type -s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section, - output_bfd, error_message) - bfd *abfd ATTRIBUTE_UNUSED; - arelent *reloc_entry; - asymbol *symbol ATTRIBUTE_UNUSED; - PTR data ATTRIBUTE_UNUSED; - asection *input_section; - bfd *output_bfd; - char **error_message ATTRIBUTE_UNUSED; +s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED, + arelent *reloc_entry, + asymbol *symbol ATTRIBUTE_UNUSED, + void * data ATTRIBUTE_UNUSED, + asection *input_section, + bfd *output_bfd, + char **error_message ATTRIBUTE_UNUSED) { if (output_bfd) reloc_entry->address += input_section->output_offset; @@ -407,15 +392,13 @@ 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; @@ -446,7 +429,7 @@ s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section, relocation -= reloc_entry->address; } - insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); + insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); @@ -458,9 +441,7 @@ 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; @@ -473,7 +454,7 @@ 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 @@ -488,6 +469,8 @@ 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 @@ -509,8 +492,8 @@ elf_s390_is_local_label_name (abfd, name) The GOT holds the address in the PLT to be executed. The loader then gets: - 24(15) = Pointer to the structure describing the object. - 28(15) = Offset in symbol table + 48(15) = Pointer to the structure describing the object. + 56(15) = Offset in symbol table The loader must then find the module where the function is and insert the address in the GOT. @@ -520,31 +503,33 @@ 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: @@ -557,34 +542,18 @@ 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. */ @@ -593,7 +562,7 @@ 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; @@ -604,39 +573,70 @@ 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; - /* tls_type for each local got entry. */ + /* A local PLT is needed for ifunc symbols. */ + struct plt_entry *local_plt; + + /* TLS type for each local got entry. */ char *local_got_tls_type; }; #define elf_s390_tdata(abfd) \ ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) +#define elf_s390_local_plt(abfd) \ + (elf_s390_tdata (abfd)->local_plt) + #define elf_s390_local_got_tls_type(abfd) \ (elf_s390_tdata (abfd)->local_got_tls_type) +#define is_s390_elf(bfd) \ + (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ + && elf_tdata (bfd) != NULL \ + && elf_object_id (bfd) == S390_ELF_DATA) + static bfd_boolean -elf_s390_mkobject (abfd) - bfd *abfd; +elf_s390_mkobject (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; + return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata), + S390_ELF_DATA); } 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); @@ -649,35 +649,34 @@ 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; bfd_vma offset; } tls_ldm_got; - /* Small local sym to section mapping cache. */ - struct sym_sec_cache sym_sec; + /* Small local sym cache. */ + struct sym_cache sym_cache; }; /* Get the s390 ELF linker hash table from a link_info structure. */ #define elf_s390_hash_table(p) \ - ((struct elf_s390_link_hash_table *) ((p)->hash)) + (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. */ @@ -699,6 +698,8 @@ 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; @@ -707,32 +708,23 @@ 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); - ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt); + ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt); if (ret == NULL) return NULL; - if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) + if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, + sizeof (struct elf_s390_link_hash_entry), + S390_ELF_DATA)) { free (ret); return NULL; } - ret->sgot = NULL; - ret->sgotplt = NULL; - ret->srelgot = NULL; - ret->splt = NULL; - ret->srelplt = NULL; - ret->sdynbss = NULL; - ret->srelbss = NULL; - ret->tls_ldm_got.refcount = 0; - ret->sym_sec.abfd = NULL; - return &ret->elf.root; } @@ -740,9 +732,8 @@ elf_s390_link_hash_table_create (abfd) shortcuts to them in our hash table. */ static bfd_boolean -create_got_section (dynobj, info) - bfd *dynobj; - struct bfd_link_info *info; +create_got_section (bfd *dynobj, + struct bfd_link_info *info) { struct elf_s390_link_hash_table *htab; @@ -750,19 +741,14 @@ create_got_section (dynobj, info) return FALSE; htab = elf_s390_hash_table (info); - htab->sgot = bfd_get_section_by_name (dynobj, ".got"); - htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); - if (!htab->sgot || !htab->sgotplt) - abort (); - - htab->srelgot = bfd_make_section (dynobj, ".rela.got"); - if (htab->srelgot == NULL - || ! bfd_set_section_flags (dynobj, htab->srelgot, - (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS - | SEC_IN_MEMORY | SEC_LINKER_CREATED - | SEC_READONLY)) - || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) + if (htab == NULL) return FALSE; + + 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; } @@ -771,27 +757,29 @@ create_got_section (dynobj, info) hash table. */ static bfd_boolean -elf_s390_create_dynamic_sections (dynobj, info) - bfd *dynobj; - struct bfd_link_info *info; +elf_s390_create_dynamic_sections (bfd *dynobj, + struct bfd_link_info *info) { struct elf_s390_link_hash_table *htab; htab = elf_s390_hash_table (info); - if (!htab->sgot && !create_got_section (dynobj, info)) + if (htab == NULL) + return FALSE; + + if (!htab->elf.sgot && !create_got_section (dynobj, info)) return FALSE; if (!_bfd_elf_create_dynamic_sections (dynobj, info)) return FALSE; - htab->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"); - if (!info->shared) - htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); + 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 (!bfd_link_pic (info)) + htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); - if (!htab->splt || !htab->srelplt || !htab->sdynbss - || (!info->shared && !htab->srelbss)) + if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss + || (!bfd_link_pic (info) && !htab->srelbss)) abort (); return TRUE; @@ -800,9 +788,9 @@ elf_s390_create_dynamic_sections (dynobj, info) /* Copy the extra info we tack onto an elf_link_hash_entry. */ static void -elf_s390_copy_indirect_symbol (bed, dir, ind) - const struct elf_backend_data *bed; - 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; @@ -813,17 +801,14 @@ elf_s390_copy_indirect_symbol (bed, dir, ind) { if (edir->dyn_relocs != NULL) { - struct elf_s390_dyn_relocs **pp; - struct elf_s390_dyn_relocs *p; - - if (ind->root.type == bfd_link_hash_indirect) - abort (); + struct elf_dyn_relocs **pp; + struct elf_dyn_relocs *p; - /* Add reloc counts against the weak sym to the strong sym + /* 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) @@ -852,26 +837,26 @@ elf_s390_copy_indirect_symbol (bed, dir, ind) 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 - | ELF_LINK_HASH_NEEDS_PLT)); + && dir->dynamic_adjusted) + { + /* If called to transfer flags for a weakdef during processing + of elf_adjust_dynamic_symbol, don't copy non_got_ref. + We clear it ourselves for ELIMINATE_COPY_RELOCS. */ + dir->ref_dynamic |= ind->ref_dynamic; + dir->ref_regular |= ind->ref_regular; + dir->ref_regular_nonweak |= ind->ref_regular_nonweak; + dir->needs_plt |= ind->needs_plt; + } else - _bfd_elf_link_hash_copy_indirect (bed, dir, ind); + _bfd_elf_link_hash_copy_indirect (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) + if (bfd_link_pic (info)) return r_type; switch (r_type) @@ -897,11 +882,10 @@ elf_s390_tls_transition (info, r_type, is_local) table. */ static bfd_boolean -elf_s390_check_relocs (abfd, info, sec, relocs) - bfd *abfd; - struct bfd_link_info *info; - asection *sec; - const Elf_Internal_Rela *relocs; +elf_s390_check_relocs (bfd *abfd, + struct bfd_link_info *info, + asection *sec, + const Elf_Internal_Rela *relocs) { struct elf_s390_link_hash_table *htab; Elf_Internal_Shdr *symtab_hdr; @@ -912,11 +896,16 @@ elf_s390_check_relocs (abfd, info, sec, relocs) bfd_signed_vma *local_got_refcounts; int tls_type, old_tls_type; - if (info->relocatable) + if (bfd_link_relocatable (info)) return TRUE; + BFD_ASSERT (is_s390_elf (abfd)); + htab = elf_s390_hash_table (info); - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + if (htab == NULL) + return FALSE; + + symtab_hdr = &elf_symtab_hdr (abfd); sym_hashes = elf_sym_hashes (abfd); local_got_refcounts = elf_local_got_refcounts (abfd); @@ -928,21 +917,58 @@ elf_s390_check_relocs (abfd, info, sec, relocs) unsigned int r_type; unsigned long r_symndx; struct elf_link_hash_entry *h; + Elf_Internal_Sym *isym; r_symndx = ELF64_R_SYM (rel->r_info); if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) { - (*_bfd_error_handler) (_("%s: bad symbol index: %d"), - bfd_archive_filename (abfd), + (*_bfd_error_handler) (_("%B: bad symbol index: %d"), + abfd, r_symndx); return FALSE; } if (r_symndx < symtab_hdr->sh_info) - h = NULL; + { + /* A local symbol. */ + isym = bfd_sym_from_r_symndx (&htab->sym_cache, + abfd, r_symndx); + if (isym == NULL) + return FALSE; + + if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) + { + struct plt_entry *plt; + + if (htab->elf.dynobj == NULL) + htab->elf.dynobj = abfd; + + if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) + return FALSE; + + if (local_got_refcounts == NULL) + { + if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) + return FALSE; + local_got_refcounts = elf_local_got_refcounts (abfd); + } + plt = elf_s390_local_plt (abfd); + plt[r_symndx].plt.refcount++; + } + h = NULL; + } else - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + { + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + while (h->root.type == bfd_link_hash_indirect + || h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + /* PR15323, ref flags aren't set for references in the same + object. */ + h->root.non_ir_ref = 1; + } /* Create got section and local_got_refcounts array if they are needed. */ @@ -973,25 +999,18 @@ elf_s390_check_relocs (abfd, info, sec, relocs) 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; @@ -1000,17 +1019,43 @@ elf_s390_check_relocs (abfd, info, sec, relocs) } } + if (h != NULL) + { + if (htab->elf.dynobj == NULL) + htab->elf.dynobj = abfd; + if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) + return FALSE; + + /* Make sure an IFUNC symbol defined in a non-shared object + always gets a PLT slot. */ + if (s390_is_ifunc_symbol_p (h) && h->def_regular) + { + /* The symbol is called by the dynamic loader in order + to resolve the relocation. So it is in fact also + referenced. */ + h->ref_regular = 1; + h->needs_plt = 1; + } + } + switch (r_type) { - case R_390_GOTOFF16: - case R_390_GOTOFF32: - case R_390_GOTOFF64: case R_390_GOTPC: case R_390_GOTPCDBL: - /* Got is created, nothing to be done. */ + /* These relocs do not need a GOT slot. They just load the + GOT pointer itself or address something else relative to + the GOT. Since the GOT pointer has been set up above we + are done. */ break; + case R_390_GOTOFF16: + case R_390_GOTOFF32: + case R_390_GOTOFF64: + if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular) + break; + case R_390_PLT12DBL: case R_390_PLT16DBL: + case R_390_PLT24DBL: case R_390_PLT32: case R_390_PLT32DBL: case R_390_PLT64: @@ -1028,7 +1073,7 @@ elf_s390_check_relocs (abfd, info, sec, relocs) creating a procedure linkage table entry. */ if (h != NULL) { - h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; + h->needs_plt = 1; h->plt.refcount += 1; } break; @@ -1050,7 +1095,7 @@ elf_s390_check_relocs (abfd, info, sec, relocs) if (h != NULL) { ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; - h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; + h->needs_plt = 1; h->plt.refcount += 1; } else @@ -1066,7 +1111,7 @@ elf_s390_check_relocs (abfd, info, sec, relocs) case R_390_TLS_GOTIE20: case R_390_TLS_GOTIE64: case R_390_TLS_IEENT: - if (info->shared) + if (bfd_link_pic (info)) info->flags |= DF_STATIC_TLS; /* Fall through */ @@ -1119,8 +1164,8 @@ elf_s390_check_relocs (abfd, info, sec, relocs) 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); + (_("%B: `%s' accessed both as normal and thread local symbol"), + abfd, h->root.root.string); return FALSE; } if (old_tls_type > tls_type) @@ -1140,7 +1185,13 @@ elf_s390_check_relocs (abfd, info, sec, relocs) /* Fall through */ case R_390_TLS_LE64: - if (!info->shared) + /* For static linking and executables this reloc will be + calculated at linktime otherwise a TLS_TPOFF runtime + reloc will be generated. */ + if (r_type == R_390_TLS_LE64 && bfd_link_pie (info)) + break; + + if (!bfd_link_pic (info)) break; info->flags |= DF_STATIC_TLS; /* Fall through */ @@ -1149,12 +1200,14 @@ elf_s390_check_relocs (abfd, info, sec, relocs) case R_390_16: case R_390_32: case R_390_64: + case R_390_PC12DBL: case R_390_PC16: case R_390_PC16DBL: + case R_390_PC24DBL: case R_390_PC32: case R_390_PC32DBL: case R_390_PC64: - if (h != NULL && !info->shared) + if (h != NULL && bfd_link_executable (info)) { /* If this reloc is in a read-only section, we might need a copy reloc. We can't check reliably at this @@ -1162,11 +1215,14 @@ elf_s390_check_relocs (abfd, info, sec, relocs) sections have not yet been mapped to output sections. Tentatively set the flag for now, and correct in adjust_dynamic_symbol. */ - h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; + h->non_got_ref = 1; - /* We may need a .plt entry if the function this reloc - refers to is in a shared lib. */ - h->plt.refcount += 1; + if (!bfd_link_pic (info)) + { + /* We may need a .plt entry if the function this reloc + refers to is in a shared lib. */ + h->plt.refcount += 1; + } } /* If we are creating a shared library, and this is a reloc @@ -1190,73 +1246,42 @@ elf_s390_check_relocs (abfd, info, sec, relocs) may need to keep relocations for symbols satisfied by a dynamic library if we manage to avoid copy relocs for the symbol. */ - if ((info->shared + if ((bfd_link_pic (info) && (sec->flags & SEC_ALLOC) != 0 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16 + && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL + && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL && ELF64_R_TYPE (rel->r_info) != R_390_PC32 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL && ELF64_R_TYPE (rel->r_info) != R_390_PC64) || (h != NULL - && (! info->symbolic + && (! SYMBOLIC_BIND (info, h) || h->root.type == bfd_link_hash_defweak - || (h->elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0)))) + || !h->def_regular)))) || (ELIMINATE_COPY_RELOCS - && !info->shared + && !bfd_link_pic (info) && (sec->flags & SEC_ALLOC) != 0 && h != NULL && (h->root.type == bfd_link_hash_defweak - || (h->elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0))) + || !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 this reloc. */ if (sreloc == NULL) { - const char *name; - bfd *dynobj; - - name = (bfd_elf_string_from_elf_section - (abfd, - elf_elfheader (abfd)->e_shstrndx, - elf_section_data (sec)->rel_hdr.sh_name)); - if (name == NULL) - return FALSE; - - if (strncmp (name, ".rela", 5) != 0 - || strcmp (bfd_get_section_name (abfd, sec), - name + 5) != 0) - { - (*_bfd_error_handler) - (_("%s: bad relocation section name `%s\'"), - bfd_archive_filename (abfd), name); - } - if (htab->elf.dynobj == NULL) htab->elf.dynobj = abfd; - dynobj = htab->elf.dynobj; - sreloc = bfd_get_section_by_name (dynobj, name); + sreloc = _bfd_elf_make_dynamic_reloc_section + (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE); + if (sreloc == NULL) - { - flagword flags; - - sreloc = bfd_make_section (dynobj, name); - flags = (SEC_HAS_CONTENTS | SEC_READONLY - | SEC_IN_MEMORY | SEC_LINKER_CREATED); - if ((sec->flags & SEC_ALLOC) != 0) - flags |= SEC_ALLOC | SEC_LOAD; - if (sreloc == NULL - || ! bfd_set_section_flags (dynobj, sreloc, flags) - || ! bfd_set_section_alignment (dynobj, sreloc, 3)) - return FALSE; - } - elf_section_data (sec)->sreloc = sreloc; + return FALSE; } /* If this is a global symbol, we count the number of @@ -1270,22 +1295,27 @@ elf_s390_check_relocs (abfd, info, sec, relocs) /* 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) + void *vpp; + + isym = bfd_sym_from_r_symndx (&htab->sym_cache, + abfd, r_symndx); + if (isym == NULL) return FALSE; - head = ((struct elf_s390_dyn_relocs **) - &elf_section_data (s)->local_dynrel); + s = bfd_section_from_elf_index (abfd, isym->st_shndx); + if (s == NULL) + s = sec; + + vpp = &elf_section_data (s)->local_dynrel; + 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; @@ -1298,6 +1328,8 @@ elf_s390_check_relocs (abfd, info, sec, relocs) p->count += 1; if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 + || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL + || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL || ELF64_R_TYPE (rel->r_info) == R_390_PC32 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL @@ -1316,7 +1348,9 @@ elf_s390_check_relocs (abfd, info, sec, relocs) /* This relocation describes which C++ vtable entries are actually used. Record for later use during GC. */ case R_390_GNU_VTENTRY: - if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) + BFD_ASSERT (h != NULL); + if (h != NULL + && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) return FALSE; break; @@ -1332,59 +1366,47 @@ elf_s390_check_relocs (abfd, info, sec, relocs) relocation. */ static asection * -elf_s390_gc_mark_hook (sec, info, rel, h, sym) - asection *sec; - struct bfd_link_info *info ATTRIBUTE_UNUSED; - Elf_Internal_Rela *rel; - struct elf_link_hash_entry *h; - Elf_Internal_Sym *sym; +elf_s390_gc_mark_hook (asection *sec, + struct bfd_link_info *info, + Elf_Internal_Rela *rel, + struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym) { if (h != NULL) - { - switch (ELF64_R_TYPE (rel->r_info)) - { - case R_390_GNU_VTINHERIT: - case R_390_GNU_VTENTRY: - break; - - default: - switch (h->root.type) - { - case bfd_link_hash_defined: - case bfd_link_hash_defweak: - return h->root.u.def.section; - - case bfd_link_hash_common: - return h->root.u.c.p->section; - - default: - break; - } - } - } - else - return bfd_section_from_elf_index (sec->owner, sym->st_shndx); - - return NULL; + switch (ELF64_R_TYPE (rel->r_info)) + { + case R_390_GNU_VTINHERIT: + case R_390_GNU_VTENTRY: + return NULL; + } + + return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); } /* Update the got entry reference counts for the section being removed. */ static bfd_boolean -elf_s390_gc_sweep_hook (abfd, info, sec, relocs) - bfd *abfd; - struct bfd_link_info *info; - asection *sec; - const Elf_Internal_Rela *relocs; +elf_s390_gc_sweep_hook (bfd *abfd, + struct bfd_link_info *info, + asection *sec, + const Elf_Internal_Rela *relocs) { + struct elf_s390_link_hash_table *htab; Elf_Internal_Shdr *symtab_hdr; struct elf_link_hash_entry **sym_hashes; bfd_signed_vma *local_got_refcounts; const Elf_Internal_Rela *rel, *relend; + if (bfd_link_relocatable (info)) + return TRUE; + + htab = elf_s390_hash_table (info); + if (htab == NULL) + return FALSE; + elf_section_data (sec)->local_dynrel = NULL; - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + symtab_hdr = &elf_symtab_hdr (abfd); sym_hashes = elf_sym_hashes (abfd); local_got_refcounts = elf_local_got_refcounts (abfd); @@ -1399,10 +1421,13 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs) 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 + || h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; eh = (struct elf_s390_link_hash_entry *) h; for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) @@ -1413,14 +1438,43 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs) 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); switch (r_type) { case R_390_TLS_LDM64: - if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) - elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; + if (htab->tls_ldm_got.refcount > 0) + htab->tls_ldm_got.refcount -= 1; + break; + case R_390_GOTOFF16: + case R_390_GOTOFF32: + case R_390_GOTOFF64: + if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular) + { + h->plt.refcount--; + break; + } + + case R_390_GOTPC: + case R_390_GOTPCDBL: break; case R_390_TLS_GD64: @@ -1434,11 +1488,6 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs) case R_390_GOT20: case R_390_GOT32: case R_390_GOT64: - case R_390_GOTOFF16: - case R_390_GOTOFF32: - case R_390_GOTOFF64: - case R_390_GOTPC: - case R_390_GOTPCDBL: case R_390_GOTENT: if (h != NULL) { @@ -1459,15 +1508,19 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs) case R_390_32: case R_390_64: case R_390_PC16: + case R_390_PC12DBL: case R_390_PC16DBL: + case R_390_PC24DBL: case R_390_PC32: case R_390_PC32DBL: case R_390_PC64: - if (info->shared) + if (bfd_link_pic (info)) break; /* Fall through */ + case R_390_PLT12DBL: case R_390_PLT16DBL: + case R_390_PLT24DBL: case R_390_PLT32: case R_390_PLT32DBL: case R_390_PLT64: @@ -1518,8 +1571,7 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs) 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; @@ -1540,26 +1592,66 @@ elf_s390_adjust_gotplt (h) understand. */ static bfd_boolean -elf_s390_adjust_dynamic_symbol (info, h) - struct bfd_link_info *info; - struct elf_link_hash_entry *h; +elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *h) { struct elf_s390_link_hash_table *htab; asection *s; - unsigned int power_of_two; + + /* STT_GNU_IFUNC symbol must go through PLT. */ + if (s390_is_ifunc_symbol_p (h)) + { + /* All local STT_GNU_IFUNC references must be treated as local + calls via local PLT. */ + if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h)) + { + bfd_size_type pc_count = 0, count = 0; + struct elf_dyn_relocs **pp; + struct elf_s390_link_hash_entry *eh; + struct elf_dyn_relocs *p; + + eh = (struct elf_s390_link_hash_entry *) h; + for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) + { + pc_count += p->pc_count; + p->count -= p->pc_count; + p->pc_count = 0; + count += p->count; + if (p->count == 0) + *pp = p->next; + else + pp = &p->next; + } + + if (pc_count || count) + { + h->needs_plt = 1; + h->non_got_ref = 1; + if (h->plt.refcount <= 0) + h->plt.refcount = 1; + else + h->plt.refcount += 1; + } + } + + if (h->plt.refcount <= 0) + { + h->plt.offset = (bfd_vma) -1; + h->needs_plt = 0; + } + return TRUE; + } /* If this is a function, put it in the procedure linkage table. We will fill in the contents of the procedure linkage table later (although we could actually do it here). */ if (h->type == STT_FUNC - || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) + || h->needs_plt) { if (h->plt.refcount <= 0 - || (! info->shared - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 - && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 - && h->root.type != bfd_link_hash_undefweak - && h->root.type != bfd_link_hash_undefined)) + || SYMBOL_CALLS_LOCAL (info, h) + || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT + && h->root.type == bfd_link_hash_undefweak)) { /* This case can occur if we saw a PLT32 reloc in an input file, but the symbol was never referred to by a dynamic @@ -1567,7 +1659,7 @@ elf_s390_adjust_dynamic_symbol (info, h) 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->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + h->needs_plt = 0; elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); } @@ -1584,16 +1676,14 @@ elf_s390_adjust_dynamic_symbol (info, h) /* If this is a weak symbol, and there is a real definition, the processor independent code will have arranged for us to see the real definition first, and we can just use the same value. */ - if (h->weakdef != NULL) + if (h->u.weakdef != NULL) { - BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined - || 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; + BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined + || h->u.weakdef->root.type == bfd_link_hash_defweak); + h->root.u.def.section = h->u.weakdef->root.u.def.section; + h->root.u.def.value = h->u.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)); + h->non_got_ref = h->u.weakdef->non_got_ref; return TRUE; } @@ -1604,25 +1694,25 @@ elf_s390_adjust_dynamic_symbol (info, h) only references to the symbol are via the global offset table. For such cases we need not do anything here; the relocations will be handled correctly by relocate_section. */ - if (info->shared) + if (bfd_link_pic (info)) return TRUE; /* If there are no references to this symbol that do not use the GOT, we don't need to generate a copy reloc. */ - if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) + if (!h->non_got_ref) return TRUE; /* If -z nocopyreloc was given, we won't generate them either. */ if (info->nocopyreloc) { - h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; + h->non_got_ref = 0; return TRUE; } 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) @@ -1636,7 +1726,7 @@ elf_s390_adjust_dynamic_symbol (info, h) 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; + h->non_got_ref = 0; return TRUE; } } @@ -1652,84 +1742,63 @@ elf_s390_adjust_dynamic_symbol (info, h) same memory location for the variable. */ htab = elf_s390_hash_table (info); + if (htab == NULL) + return FALSE; /* 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->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; + h->needs_copy = 1; } - /* We need to figure out the alignment required for this symbol. I - have no idea how ELF linkers handle this. */ - power_of_two = bfd_log2 (h->size); - if (power_of_two > 3) - power_of_two = 3; - - /* Apply the required alignment. */ s = htab->sdynbss; - s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); - if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) - { - if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) - return FALSE; - } - - /* Define the symbol as being at this point in the section. */ - h->root.u.def.section = s; - h->root.u.def.value = s->size; - - /* Increment the section size to make room for the symbol. */ - s->size += h->size; - return TRUE; + return _bfd_elf_adjust_dynamic_copy (info, h, s); } /* Allocate space in .plt, .got and associated reloc sections for dynamic relocs. */ static bfd_boolean -allocate_dynrelocs (h, inf) - struct elf_link_hash_entry *h; - PTR inf; +allocate_dynrelocs (struct elf_link_hash_entry *h, + void * inf) { 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; - if (h->root.type == bfd_link_hash_warning) - /* When warning symbols are created, they **replace** the "real" - entry in the hash table, thus we never get to see the real - symbol in a hash traversal. So look at it now. */ - h = (struct elf_link_hash_entry *) h->root.u.i.link; - info = (struct bfd_link_info *) inf; htab = elf_s390_hash_table (info); + if (htab == NULL) + return FALSE; - if (htab->elf.dynamic_sections_created - && h->plt.refcount > 0 - && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT - || h->root.type != bfd_link_hash_undefweak)) + /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it + here if it is defined and referenced in a non-shared object. */ + if (s390_is_ifunc_symbol_p (h) && h->def_regular) + return s390_elf_allocate_ifunc_dyn_relocs (info, h); + else if (htab->elf.dynamic_sections_created + && h->plt.refcount > 0) { /* Make sure this symbol is output as a dynamic symbol. Undefined weak syms won't yet be marked as dynamic. */ if (h->dynindx == -1 - && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) + && !h->forced_local) { if (! bfd_elf_link_record_dynamic_symbol (info, h)) return FALSE; } - if (info->shared + if (bfd_link_pic (info) || 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. */ @@ -1743,8 +1812,8 @@ allocate_dynrelocs (h, inf) location in the .plt. This is required to make function pointers compare as equal between the normal executable and the shared library. */ - if (! info->shared - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) + if (! bfd_link_pic (info) + && !h->def_regular) { h->root.u.def.section = s; h->root.u.def.value = h->plt.offset; @@ -1755,22 +1824,22 @@ allocate_dynrelocs (h, inf) /* 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 { h->plt.offset = (bfd_vma) -1; - h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + h->needs_plt = 0; elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); } } else { h->plt.offset = (bfd_vma) -1; - h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + h->needs_plt = 0; elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); } @@ -1779,7 +1848,7 @@ allocate_dynrelocs (h, inf) to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT we can save the dynamic TLS relocation. */ if (h->got.refcount > 0 - && !info->shared + && !bfd_link_pic (info) && h->dynindx == -1 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) { @@ -1788,8 +1857,8 @@ allocate_dynrelocs (h, inf) 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; @@ -1803,13 +1872,13 @@ allocate_dynrelocs (h, inf) /* Make sure this symbol is output as a dynamic symbol. Undefined weak syms won't yet be marked as dynamic. */ if (h->dynindx == -1 - && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) + && !h->forced_local) { if (! bfd_elf_link_record_dynamic_symbol (info, 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. */ @@ -1820,19 +1889,18 @@ allocate_dynrelocs (h, inf) 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 + && (bfd_link_pic (info) || 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; @@ -1842,11 +1910,11 @@ allocate_dynrelocs (h, inf) space for pc-relative relocs that have become local due to symbol visibility changes. */ - if (info->shared) + if (bfd_link_pic (info)) { - if (SYMBOL_REFERENCES_LOCAL (info, 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; ) { @@ -1861,9 +1929,21 @@ allocate_dynrelocs (h, inf) /* Also discard relocs on undefined weak syms with non-default visibility. */ - if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT + if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak) - eh->dyn_relocs = NULL; + { + if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) + eh->dyn_relocs = NULL; + + /* Make sure undefined weak symbols are output as a dynamic + symbol in PIEs. */ + else if (h->dynindx == -1 + && !h->forced_local) + { + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + } } else if (ELIMINATE_COPY_RELOCS) { @@ -1871,9 +1951,9 @@ allocate_dynrelocs (h, inf) symbols which turn out to need copy relocs or are not dynamic. */ - if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 - && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) + if (!h->non_got_ref + && ((h->def_dynamic + && !h->def_regular) || (htab->elf.dynamic_sections_created && (h->root.type == bfd_link_hash_undefweak || h->root.type == bfd_link_hash_undefined)))) @@ -1881,7 +1961,7 @@ allocate_dynrelocs (h, inf) /* Make sure this symbol is output as a dynamic symbol. Undefined weak syms won't yet be marked as dynamic. */ if (h->dynindx == -1 - && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) + && !h->forced_local) { if (! bfd_elf_link_record_dynamic_symbol (info, h)) return FALSE; @@ -1911,15 +1991,10 @@ allocate_dynrelocs (h, inf) /* 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; - - if (h->root.type == bfd_link_hash_warning) - h = (struct elf_link_hash_entry *) h->root.u.i.link; + struct elf_dyn_relocs *p; eh = (struct elf_s390_link_hash_entry *) h; for (p = eh->dyn_relocs; p != NULL; p = p->next) @@ -1942,9 +2017,8 @@ readonly_dynrelocs (h, inf) /* Set the sizes of the dynamic sections. */ static bfd_boolean -elf_s390_size_dynamic_sections (output_bfd, info) - bfd *output_bfd ATTRIBUTE_UNUSED; - struct bfd_link_info *info; +elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) { struct elf_s390_link_hash_table *htab; bfd *dynobj; @@ -1953,6 +2027,9 @@ elf_s390_size_dynamic_sections (output_bfd, info) bfd *ibfd; htab = elf_s390_hash_table (info); + if (htab == NULL) + return FALSE; + dynobj = htab->elf.dynobj; if (dynobj == NULL) abort (); @@ -1960,9 +2037,9 @@ elf_s390_size_dynamic_sections (output_bfd, info) if (htab->elf.dynamic_sections_created) { /* Set the contents of the .interp section to the interpreter. */ - if (info->executable) + if (bfd_link_executable (info) && !info->nointerp) { - s = bfd_get_section_by_name (dynobj, ".interp"); + s = bfd_get_linker_section (dynobj, ".interp"); if (s == NULL) abort (); s->size = sizeof ELF_DYNAMIC_INTERPRETER; @@ -1972,7 +2049,7 @@ elf_s390_size_dynamic_sections (output_bfd, info) /* Set up .got offsets for local syms, and space for local dynamic relocs. */ - for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) { bfd_signed_vma *local_got; bfd_signed_vma *end_local_got; @@ -1980,18 +2057,17 @@ elf_s390_size_dynamic_sections (output_bfd, info) bfd_size_type locsymcount; Elf_Internal_Shdr *symtab_hdr; asection *srela; + struct plt_entry *local_plt; + unsigned int i; - if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) + 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 = *((struct elf_s390_dyn_relocs **) - &elf_section_data (s)->local_dynrel); - p != NULL; - p = p->next) + for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) { if (!bfd_is_abs_section (p->sec) && bfd_is_abs_section (p->sec->output_section)) @@ -2015,12 +2091,12 @@ elf_s390_size_dynamic_sections (output_bfd, info) if (!local_got) continue; - symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; + symtab_hdr = &elf_symtab_hdr (ibfd); 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) @@ -2029,28 +2105,42 @@ elf_s390_size_dynamic_sections (output_bfd, info) s->size += GOT_ENTRY_SIZE; if (*local_tls_type == GOT_TLS_GD) s->size += GOT_ENTRY_SIZE; - if (info->shared) + if (bfd_link_pic (info)) srela->size += sizeof (Elf64_External_Rela); } else *local_got = (bfd_vma) -1; } + + local_plt = elf_s390_local_plt (ibfd); + for (i = 0; i < symtab_hdr->sh_info; i++) + { + if (local_plt[i].plt.refcount > 0) + { + local_plt[i].plt.offset = htab->elf.iplt->size; + htab->elf.iplt->size += PLT_ENTRY_SIZE; + htab->elf.igotplt->size += GOT_ENTRY_SIZE; + htab->elf.irelplt->size += sizeof (Elf64_External_Rela); + } + else + local_plt[i].plt.offset = (bfd_vma) -1; + } } if (htab->tls_ldm_got.refcount > 0) { /* Allocate 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. */ @@ -2060,16 +2150,20 @@ elf_s390_size_dynamic_sections (output_bfd, info) if ((s->flags & SEC_LINKER_CREATED) == 0) continue; - if (s == htab->splt - || s == htab->sgot - || s == htab->sgotplt) + 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 (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) + 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 @@ -2094,10 +2188,13 @@ elf_s390_size_dynamic_sections (output_bfd, info) function which decides whether anything needs to go into these sections. */ - _bfd_strip_section_from_output (info, s); + s->flags |= SEC_EXCLUDE; continue; } + if ((s->flags & SEC_HAS_CONTENTS) == 0) + continue; + /* Allocate memory for the section contents. We use bfd_zalloc here in case unused entries are not reclaimed before the section's contents are written out. This should not happen, @@ -2118,13 +2215,13 @@ elf_s390_size_dynamic_sections (output_bfd, info) #define add_dynamic_entry(TAG, VAL) \ _bfd_elf_add_dynamic_entry (info, TAG, VAL) - if (info->executable) + if (bfd_link_executable (info)) { if (!add_dynamic_entry (DT_DEBUG, 0)) return FALSE; } - if (htab->splt->size != 0) + if (htab->elf.splt->size != 0) { if (!add_dynamic_entry (DT_PLTGOT, 0) || !add_dynamic_entry (DT_PLTRELSZ, 0) @@ -2144,7 +2241,7 @@ elf_s390_size_dynamic_sections (output_bfd, info) 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) { @@ -2163,8 +2260,7 @@ elf_s390_size_dynamic_sections (output_bfd, info) 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) @@ -2176,9 +2272,7 @@ 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); @@ -2192,35 +2286,33 @@ 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; howto = elf_howto_table + ELF64_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), + (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"), + input_bfd, + input_section, (long) rel->r_offset, howto->name); + bfd_set_error (bfd_error_bad_value); } /* Relocate a 390 ELF section. */ static bfd_boolean -elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, - contents, relocs, local_syms, local_sections) - bfd *output_bfd; - struct bfd_link_info *info; - bfd *input_bfd; - asection *input_section; - bfd_byte *contents; - Elf_Internal_Rela *relocs; - Elf_Internal_Sym *local_syms; - asection **local_sections; +elf_s390_relocate_section (bfd *output_bfd, + struct bfd_link_info *info, + bfd *input_bfd, + asection *input_section, + bfd_byte *contents, + Elf_Internal_Rela *relocs, + Elf_Internal_Sym *local_syms, + asection **local_sections) { struct elf_s390_link_hash_table *htab; Elf_Internal_Shdr *symtab_hdr; @@ -2229,11 +2321,13 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, Elf_Internal_Rela *rel; Elf_Internal_Rela *relend; - if (info->relocatable) - return TRUE; + BFD_ASSERT (is_s390_elf (input_bfd)); htab = elf_s390_hash_table (info); - symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + if (htab == NULL) + return FALSE; + + symtab_hdr = &elf_symtab_hdr (input_bfd); sym_hashes = elf_sym_hashes (input_bfd); local_got_offsets = elf_local_got_offsets (input_bfd); @@ -2252,6 +2346,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, bfd_boolean unresolved_reloc; bfd_reloc_status_type r; int tls_type; + asection *base_got = htab->elf.sgot; r_type = ELF64_R_TYPE (rel->r_info); if (r_type == (int) R_390_GNU_VTINHERIT @@ -2266,7 +2361,6 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, howto = elf_howto_table + r_type; r_symndx = ELF64_R_SYM (rel->r_info); - /* This is a final link. */ h = NULL; sym = NULL; sec = NULL; @@ -2275,18 +2369,79 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, { sym = local_syms + r_symndx; sec = local_sections[r_symndx]; - relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); + + if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) + { + struct plt_entry *local_plt = elf_s390_local_plt (input_bfd); + if (local_plt == NULL) + return FALSE; + + /* Address of the PLT slot. */ + relocation = (htab->elf.iplt->output_section->vma + + htab->elf.iplt->output_offset + + local_plt[r_symndx].plt.offset); + + switch (r_type) + { + case R_390_PLTOFF16: + case R_390_PLTOFF32: + case R_390_PLTOFF64: + relocation -= htab->elf.sgot->output_section->vma; + break; + case R_390_GOTPLT12: + case R_390_GOTPLT16: + case R_390_GOTPLT20: + case R_390_GOTPLT32: + case R_390_GOTPLT64: + case R_390_GOTPLTENT: + case R_390_GOT12: + case R_390_GOT16: + case R_390_GOT20: + case R_390_GOT32: + case R_390_GOT64: + case R_390_GOTENT: + { + /* Write the PLT slot address into the GOT slot. */ + bfd_put_64 (output_bfd, relocation, + htab->elf.sgot->contents + + local_got_offsets[r_symndx]); + relocation = (local_got_offsets[r_symndx] + + htab->elf.sgot->output_offset); + + if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) + relocation += htab->elf.sgot->output_section->vma; + break; + } + default: + break; + } + /* The output section is needed later in + finish_dynamic_section when creating the dynamic + relocation. */ + local_plt[r_symndx].sec = sec; + goto do_relocation; + } + else + relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); } else { bfd_boolean warned ATTRIBUTE_UNUSED; + bfd_boolean ignored ATTRIBUTE_UNUSED; RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, r_symndx, symtab_hdr, sym_hashes, h, sec, relocation, - unresolved_reloc, warned); + unresolved_reloc, warned, ignored); } + if (sec != NULL && discarded_section (sec)) + RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, + rel, 1, relend, howto, 0, contents); + + if (bfd_link_relocatable (info)) + continue; + switch (r_type) { case R_390_GOTPLT12: @@ -2308,18 +2463,28 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, { bfd_vma plt_index; - /* Calc. index no. - Current offset - size first entry / entry size. */ - plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / - PLT_ENTRY_SIZE; - - /* Offset in GOT is PLT index plus GOT headers(3) times 4, - addr & GOT addr. */ - relocation = (plt_index + 3) * GOT_ENTRY_SIZE; + if (s390_is_ifunc_symbol_p (h)) + { + plt_index = h->plt.offset / PLT_ENTRY_SIZE; + relocation = (plt_index * GOT_ENTRY_SIZE + + htab->elf.igotplt->output_offset); + if (r_type == R_390_GOTPLTENT) + relocation += htab->elf.igotplt->output_section->vma; + } + else + { + /* Calc. index no. + Current offset - size first entry / entry size. */ + plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / + PLT_ENTRY_SIZE; + + /* Offset in GOT is PLT index plus GOT headers(3) + times 8, addr & GOT addr. */ + relocation = (plt_index + 3) * GOT_ENTRY_SIZE; + if (r_type == R_390_GOTPLTENT) + relocation += htab->elf.sgot->output_section->vma; + } unresolved_reloc = FALSE; - - if (r_type == R_390_GOTPLTENT) - relocation += htab->sgot->output_section->vma; break; } /* Fall through. */ @@ -2332,7 +2497,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, 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) @@ -2341,14 +2506,31 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, off = h->got.offset; dyn = htab->elf.dynamic_sections_created; - 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)) - || (ELF_ST_VISIBILITY (h->other) - && h->root.type == bfd_link_hash_undefweak)) + + if (s390_is_ifunc_symbol_p (h)) + { + BFD_ASSERT (h->plt.offset != (bfd_vma) -1); + if (off == (bfd_vma)-1) + { + /* No explicit GOT usage so redirect to the + got.iplt slot. */ + base_got = htab->elf.igotplt; + off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE; + } + else + { + /* Explicit GOT slots must contain the address + of the PLT slot. This will be handled in + finish_dynamic_symbol. */ + } + } + else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, + bfd_link_pic (info), + h) + || (bfd_link_pic (info) + && SYMBOL_REFERENCES_LOCAL (info, h)) + || (ELF_ST_VISIBILITY (h->other) + && h->root.type == bfd_link_hash_undefweak)) { /* This is actually a static link, or it is a -Bsymbolic link and the symbol is defined @@ -2367,9 +2549,40 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, else { bfd_put_64 (output_bfd, relocation, - htab->sgot->contents + off); + base_got->contents + off); h->got.offset |= 1; } + + if ((h->def_regular + && bfd_link_pic (info) + && SYMBOL_REFERENCES_LOCAL (info, h)) + /* lgrl rx,sym@GOTENT -> larl rx, sym */ + && ((r_type == R_390_GOTENT + && (bfd_get_16 (input_bfd, + contents + rel->r_offset - 2) + & 0xff0f) == 0xc408) + /* lg rx, sym@GOT(r12) -> larl rx, sym */ + || (r_type == R_390_GOT20 + && (bfd_get_32 (input_bfd, + contents + rel->r_offset - 2) + & 0xff00f000) == 0xe300c000 + && bfd_get_8 (input_bfd, + contents + rel->r_offset + 3) == 0x04))) + + { + unsigned short new_insn = + (0xc000 | (bfd_get_8 (input_bfd, + contents + rel->r_offset - 1) & 0xf0)); + bfd_put_16 (output_bfd, new_insn, + contents + rel->r_offset - 2); + r_type = R_390_PC32DBL; + rel->r_addend = 2; + howto = elf_howto_table + r_type; + relocation = h->root.u.def.value + + h->root.u.def.section->output_section->vma + + h->root.u.def.section->output_offset; + goto do_relocation; + } } else unresolved_reloc = FALSE; @@ -2389,20 +2602,20 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, else { bfd_put_64 (output_bfd, relocation, - htab->sgot->contents + off); + htab->elf.sgot->contents + off); - if (info->shared) + if (bfd_link_pic (info)) { asection *s; 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; @@ -2418,7 +2631,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, 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 @@ -2426,7 +2639,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, 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; @@ -2436,22 +2649,36 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, /* Relocation is relative to the start of the global offset table. */ + if (h != NULL + && s390_is_ifunc_symbol_p (h) + && h->def_regular + && !bfd_link_executable (info)) + { + relocation = (htab->elf.iplt->output_section->vma + + htab->elf.iplt->output_offset + + h->plt.offset + - htab->elf.sgot->output_section->vma); + goto do_relocation; + } + /* Note that sgot->output_offset is not involved in this calculation. We always want the start of .got. If we defined _GLOBAL_OFFSET_TABLE in a different way, as is 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; + case R_390_PLT12DBL: case R_390_PLT16DBL: + case R_390_PLT24DBL: case R_390_PLT32: case R_390_PLT32DBL: case R_390_PLT64: @@ -2464,17 +2691,21 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, break; if (h->plt.offset == (bfd_vma) -1 - || htab->splt == NULL) + || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) { /* We didn't make a PLT entry for this symbol. This happens when statically linking PIC code, or when using -Bsymbolic. */ break; } - - relocation = (htab->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; @@ -2486,57 +2717,136 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, /* 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) + || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) { - 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; - case R_390_8: - case R_390_16: - case R_390_32: - case R_390_64: case R_390_PC16: + case R_390_PC12DBL: case R_390_PC16DBL: + case R_390_PC24DBL: case R_390_PC32: case R_390_PC32DBL: case R_390_PC64: - /* 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) + /* The target of these relocs are instruction operands + residing in read-only sections. We cannot emit a runtime + reloc for it. */ + if (h != NULL + && s390_is_ifunc_symbol_p (h) + && h->def_regular + && bfd_link_pic (info)) + { + relocation = (htab->elf.iplt->output_section->vma + + htab->elf.iplt->output_offset + + h->plt.offset); + goto do_relocation; + } + + case R_390_8: + case R_390_16: + case R_390_32: + case R_390_64: + + if (h != NULL + && s390_is_ifunc_symbol_p (h) + && h->def_regular) + { + if (!bfd_link_pic (info) || !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 + || bfd_link_executable (info)) + { + /* This symbol is resolved locally. */ + outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE); + outrel.r_addend = (h->root.u.def.value + + h->root.u.def.section->output_section->vma + + h->root.u.def.section->output_offset); + } + else + { + outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); + outrel.r_addend = 0; + } + + sreloc = htab->elf.irelifunc; + elf_append_rela (output_bfd, sreloc, &outrel); + + /* If this reloc is against an external symbol, we + do not want to fiddle with the addend. Otherwise, + we need to include the symbol value so that it + becomes an addend for the dynamic reloc. For an + internal symbol, we have updated addend. */ + continue; + } + } + + if ((input_section->flags & SEC_ALLOC) == 0) break; - if ((info->shared + if ((bfd_link_pic (info) && (h == NULL || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT || h->root.type != bfd_link_hash_undefweak) && ((r_type != R_390_PC16 + && r_type != R_390_PC12DBL && r_type != R_390_PC16DBL + && r_type != R_390_PC24DBL && r_type != R_390_PC32 && r_type != R_390_PC32DBL && r_type != R_390_PC64) - || (h != NULL - && !SYMBOL_REFERENCES_LOCAL (info, h)))) + || !SYMBOL_CALLS_LOCAL (info, h))) || (ELIMINATE_COPY_RELOCS - && !info->shared + && !bfd_link_pic (info) && h != NULL && h->dynindx != -1 - && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 - && (((h->elf_link_hash_flags - & ELF_LINK_HASH_DEF_DYNAMIC) != 0 - && (h->elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0) + && !h->non_got_ref + && ((h->def_dynamic + && !h->def_regular) || h->root.type == bfd_link_hash_undefweak || h->root.type == bfd_link_hash_undefined))) { @@ -2567,14 +2877,15 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, else if (h != NULL && h->dynindx != -1 && (r_type == R_390_PC16 + || r_type == R_390_PC12DBL || r_type == R_390_PC16DBL + || r_type == R_390_PC24DBL || r_type == R_390_PC32 || r_type == R_390_PC32DBL || r_type == R_390_PC64 - || !info->shared - || !info->symbolic - || (h->elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0)) + || !bfd_link_pic (info) + || !SYMBOLIC_BIND (info, h) + || !h->def_regular)) { outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); outrel.r_addend = rel->r_addend; @@ -2605,14 +2916,19 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, osec = sec->output_section; sindx = elf_section_data (osec)->dynindx; - BFD_ASSERT (sindx > 0); + + if (sindx == 0) + { + osec = htab->elf.text_index_section; + sindx = elf_section_data (osec)->dynindx; + } + BFD_ASSERT (sindx != 0); /* We are turning this relocation into one against a section symbol, so subtract out the output section's address but not the offset of the input section in the output section. */ - outrel.r_addend -= osec->vma; } outrel.r_info = ELF64_R_INFO (sindx, r_type); @@ -2639,7 +2955,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, /* Relocations for tls literal pool entries. */ case R_390_TLS_IE64: - if (info->shared) + if (bfd_link_pic (info)) { Elf_Internal_Rela outrel; asection *sreloc; @@ -2667,7 +2983,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, else if (h != NULL) { tls_type = elf_s390_hash_entry(h)->tls_type; - if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) + if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE) r_type = R_390_TLS_LE64; } if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE) @@ -2683,7 +2999,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, continue; } - if (htab->sgot == NULL) + if (htab->elf.sgot == NULL) abort (); if (h != NULL) @@ -2706,11 +3022,11 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, 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) @@ -2722,8 +3038,8 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, 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); @@ -2734,14 +3050,14 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, 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); } @@ -2757,14 +3073,14 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, 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; } @@ -2778,37 +3094,37 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, if (local_got_offsets == NULL) abort(); off = local_got_offsets[r_symndx]; - if (info->shared) + if (bfd_link_pic (info)) goto emit_tls_relocs; } else { off = h->got.offset; tls_type = elf_s390_hash_entry(h)->tls_type; - if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) + if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE) goto emit_tls_relocs; } - 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; case R_390_TLS_LDM64: - if (! info->shared) + if (! bfd_link_pic (info)) /* The literal pool entry this relocation refers to gets ignored by the optimized code of the local exec model. Do nothing and the value will turn out zero. */ continue; - if (htab->sgot == NULL) + if (htab->elf.sgot == NULL) abort (); off = htab->tls_ldm_got.offset; @@ -2819,28 +3135,28 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, 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; case R_390_TLS_LE64: - if (info->shared) + if (bfd_link_dll (info)) { /* Linking a shared library with non-fpic code requires a R_390_TLS_TPOFF relocation. */ @@ -2877,7 +3193,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, continue; case R_390_TLS_LDO64: - if (info->shared || (input_section->flags & SEC_CODE) == 0) + if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING)) relocation -= dtpoff_base (info); else /* When converting LDO to LE, we must negate. */ @@ -2899,7 +3215,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, if (r_type == R_390_TLS_LOAD) { - if (!info->shared && (h == NULL || h->dynindx == -1)) + if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) { /* IE->LE transition. Four valid cases: lg %rx,(0,%ry) -> sllg %rx,%ry,0 @@ -2941,7 +3257,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); if ((insn0 & 0xffff0000) != 0xc0e50000) invalid_tls_insn (input_bfd, input_section, rel); - if (!info->shared && (h == NULL || h->dynindx == -1)) + if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) { /* GD->LE transition. brasl %r14,__tls_get_addr@plt -> brcl 0,. */ @@ -2960,7 +3276,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, } else if (r_type == R_390_TLS_LDCALL) { - if (!info->shared) + if (!bfd_link_pic (info)) { unsigned int insn0, insn1; @@ -2987,14 +3303,26 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, not process them. */ if (unresolved_reloc && !((input_section->flags & SEC_DEBUGGING) != 0 - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) + && h->def_dynamic) + && _bfd_elf_section_offset (output_bfd, info, input_section, + rel->r_offset) != (bfd_vma) -1) (*_bfd_error_handler) - (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), - bfd_archive_filename (input_bfd), - bfd_get_section_name (input_bfd, input_section), + (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), + input_bfd, + input_section, (long) rel->r_offset, + howto->name, h->root.root.string); + do_relocation: + + /* When applying a 24 bit reloc we need to start one byte + earlier. Otherwise the 32 bit get/put bfd operations might + access a byte after the actual section. */ + if (r_type == R_390_PC24DBL + || r_type == R_390_PLT24DBL) + rel->r_offset--; + if (r_type == R_390_20 || r_type == R_390_GOT20 || r_type == R_390_GOTPLT20 @@ -3029,19 +3357,14 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, } if (r == bfd_reloc_overflow) - { - - if (! ((*info->callbacks->reloc_overflow) - (info, name, howto->name, (bfd_vma) 0, - input_bfd, input_section, rel->r_offset))) - return FALSE; - } + (*info->callbacks->reloc_overflow) + (info, (h ? &h->root : NULL), name, howto->name, + (bfd_vma) 0, input_bfd, input_section, rel->r_offset); else { (*_bfd_error_handler) - (_("%s(%s+0x%lx): reloc against `%s': error %d"), - bfd_archive_filename (input_bfd), - bfd_get_section_name (input_bfd, input_section), + (_("%B(%A+0x%lx): reloc against `%s': error %d"), + input_bfd, input_section, (long) rel->r_offset, name, (int) r); return FALSE; } @@ -3051,19 +3374,107 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, return TRUE; } +/* Generate the PLT slots together with the dynamic relocations needed + for IFUNC symbols. */ + +static void +elf_s390_finish_ifunc_symbol (bfd *output_bfd, + struct bfd_link_info *info, + struct elf_link_hash_entry *h, + struct elf_s390_link_hash_table *htab, + bfd_vma plt_offset, + bfd_vma resolver_address) +{ + bfd_vma plt_index; + bfd_vma got_offset; + Elf_Internal_Rela rela; + bfd_byte *loc; + asection *plt, *gotplt, *relplt; + + if (htab->elf.iplt == NULL + || htab->elf.igotplt == NULL + || htab->elf.irelplt == NULL) + abort (); + + /* Index of the PLT slot within iplt section. */ + plt_index = plt_offset / PLT_ENTRY_SIZE; + plt = htab->elf.iplt; + /* Offset into the igot.plt section. */ + got_offset = plt_index * GOT_ENTRY_SIZE; + gotplt = htab->elf.igotplt; + relplt = htab->elf.irelplt; + + /* Fill in the blueprint of a PLT. */ + memcpy (plt->contents + plt_offset, elf_s390x_plt_entry, + PLT_ENTRY_SIZE); + + /* Fixup the relative address to the GOT entry */ + bfd_put_32 (output_bfd, + (gotplt->output_section->vma + + gotplt->output_offset + got_offset + - (plt->output_section->vma + + plt->output_offset + + plt_offset))/2, + plt->contents + plt_offset + 2); + /* Fixup the relative branch to PLT 0 */ + bfd_put_32 (output_bfd, - (plt->output_offset + + (PLT_ENTRY_SIZE * plt_index) + 22)/2, + plt->contents + plt_offset + 24); + /* Fixup offset into .rela.plt section. */ + bfd_put_32 (output_bfd, relplt->output_offset + + plt_index * sizeof (Elf64_External_Rela), + plt->contents + plt_offset + 28); + + /* Fill in the entry in the global offset table. + Points to instruction after GOT offset. */ + bfd_put_64 (output_bfd, + (plt->output_section->vma + + plt->output_offset + + plt_offset + + 14), + gotplt->contents + got_offset); + + /* Fill in the entry in the .rela.plt section. */ + rela.r_offset = (gotplt->output_section->vma + + gotplt->output_offset + + got_offset); + + if (!h + || h->dynindx == -1 + || ((bfd_link_executable (info) + || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) + && h->def_regular)) + { + /* The symbol can be locally resolved. */ + rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE); + rela.r_addend = resolver_address; + } + else + { + rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); + rela.r_addend = 0; + } + + loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); +} + + /* Finish up dynamic symbol handling. We set the contents of various dynamic sections here. */ static bfd_boolean -elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) - bfd *output_bfd; - struct bfd_link_info *info; - struct elf_link_hash_entry *h; - Elf_Internal_Sym *sym; +elf_s390_finish_dynamic_symbol (bfd *output_bfd, + struct bfd_link_info *info, + struct elf_link_hash_entry *h, + 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) + return FALSE; if (h->plt.offset != (bfd_vma) -1) { @@ -3074,78 +3485,81 @@ elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) /* This symbol has an entry in the procedure linkage table. Set it up. */ + if (s390_is_ifunc_symbol_p (h) && h->def_regular) + { + elf_s390_finish_ifunc_symbol (output_bfd, info, h, + htab, h->plt.offset, + eh->ifunc_resolver_address + + eh->ifunc_resolver_section->output_offset + + eh->ifunc_resolver_section->output_section->vma); + + /* Do not return yet. Handling of explicit GOT slots of + IFUNC symbols is below. */ + } + else + { + if (h->dynindx == -1 + || htab->elf.splt == NULL + || htab->elf.sgotplt == NULL + || htab->elf.srelplt == NULL) + abort (); - if (h->dynindx == -1 - || htab->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->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) - { - /* Mark the symbol as undefined, rather than as defined in - the .plt section. Leave the value alone. 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; + } } } @@ -3159,24 +3573,46 @@ elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) /* 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 - && (info->symbolic - || h->dynindx == -1 - || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) + if (h->def_regular && s390_is_ifunc_symbol_p (h)) { + if (bfd_link_pic (info)) + { + /* An explicit GOT slot usage needs GLOB_DAT. If the + symbol references local the implicit got.iplt slot + will be used and the IRELATIVE reloc has been created + above. */ + goto do_glob_dat; + } + else + { + /* For non-shared objects explicit GOT slots must be + filled with the PLT slot address for pointer + equality reasons. */ + bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma + + htab->elf.iplt->output_offset + + h->plt.offset), + htab->elf.sgot->contents + h->got.offset); + return TRUE; + } + } + else if (bfd_link_pic (info) + && SYMBOL_REFERENCES_LOCAL (info, h)) + { + /* If this is a static link, or it is a -Bsymbolic link and + the symbol is defined locally or was forced to be local + because of a version file, we just want to emit a + RELATIVE reloc. The entry in the global offset table + will already have been initialized in the + relocate_section function. */ + if (!h->def_regular) + return FALSE; BFD_ASSERT((h->got.offset & 1) != 0); rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); rela.r_addend = (h->root.u.def.value @@ -3186,17 +3622,18 @@ elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) 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); } - if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) + if (h->needs_copy) { Elf_Internal_Rela rela; bfd_byte *loc; @@ -3220,9 +3657,9 @@ elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) } /* Mark some specially defined symbols as absolute. */ - if (strcmp (h->root.root.string, "_DYNAMIC") == 0 - || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 - || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) + if (h == htab->elf.hdynamic + || h == htab->elf.hgot + || h == htab->elf.hplt) sym->st_shndx = SHN_ABS; return TRUE; @@ -3232,9 +3669,27 @@ elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) dynamic linker, before writing them out. */ static enum elf_reloc_type_class -elf_s390_reloc_type_class (rela) - const Elf_Internal_Rela *rela; +elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, + const asection *rel_sec ATTRIBUTE_UNUSED, + const Elf_Internal_Rela *rela) { + bfd *abfd = info->output_bfd; + const struct elf_backend_data *bed = get_elf_backend_data (abfd); + struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info); + unsigned long r_symndx = ELF64_R_SYM (rela->r_info); + Elf_Internal_Sym sym; + + if (htab->elf.dynsym == NULL + || !bed->s->swap_symbol_in (abfd, + (htab->elf.dynsym->contents + + r_symndx * bed->s->sizeof_sym), + 0, &sym)) + abort (); + + /* Check relocation against STT_GNU_IFUNC symbol. */ + if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) + return reloc_class_ifunc; + switch ((int) ELF64_R_TYPE (rela->r_info)) { case R_390_RELATIVE: @@ -3251,23 +3706,27 @@ elf_s390_reloc_type_class (rela) /* Finish up the dynamic sections. */ static bfd_boolean -elf_s390_finish_dynamic_sections (output_bfd, info) - bfd *output_bfd; - struct bfd_link_info *info; +elf_s390_finish_dynamic_sections (bfd *output_bfd, + struct bfd_link_info *info) { 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; @@ -3285,15 +3744,17 @@ elf_s390_finish_dynamic_sections (output_bfd, info) continue; case DT_PLTGOT: - dyn.d_un.d_ptr = htab->sgot->output_section->vma; + s = htab->elf.sgotplt; + dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; break; case DT_JMPREL: - dyn.d_un.d_ptr = htab->srelplt->output_section->vma; + s = htab->elf.srelplt; + dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; break; case DT_PLTRELSZ: - s = htab->srelplt->output_section; + s = htab->elf.srelplt; dyn.d_un.d_val = s->size; break; @@ -3305,7 +3766,7 @@ elf_s390_finish_dynamic_sections (output_bfd, info) 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; dyn.d_un.d_val -= s->size; break; } @@ -3314,52 +3775,74 @@ elf_s390_finish_dynamic_sections (output_bfd, info) } /* 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 + - htab->elf.splt->output_offset - 6)/2, + htab->elf.splt->contents + 8); } - elf_section_data (htab->splt->output_section) - ->this_hdr.sh_entsize = PLT_ENTRY_SIZE; + if (elf_section_data (htab->elf.splt->output_section) != NULL) + elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize + = PLT_ENTRY_SIZE; } - if (htab->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 + 16); } - 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; } @@ -3373,6 +3856,20 @@ elf_s390_plt_sym_val (bfd_vma i, const asection *plt, return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; } +/* Merge backend specific data from an object file to the output + object file when linking. */ + +static bfd_boolean +elf64_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd) +{ + if (!is_s390_elf (ibfd) || !is_s390_elf (obfd)) + return TRUE; + + if (!elf_s390_merge_obj_attributes (ibfd, obfd)) + return FALSE; + + return TRUE; +} /* Why was the hash table entry size definition changed from ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and @@ -3395,6 +3892,7 @@ const struct elf_size_info s390_elf64_size_info = ELFCLASS64, EV_CURRENT, bfd_elf64_write_out_phdrs, bfd_elf64_write_shdrs_and_ehdr, + bfd_elf64_checksum_contents, bfd_elf64_write_relocs, bfd_elf64_swap_symbol_in, bfd_elf64_swap_symbol_out, @@ -3408,9 +3906,10 @@ const struct elf_size_info s390_elf64_size_info = bfd_elf64_swap_reloca_out }; -#define TARGET_BIG_SYM bfd_elf64_s390_vec +#define TARGET_BIG_SYM s390_elf64_vec #define TARGET_BIG_NAME "elf64-s390" #define ELF_ARCH bfd_arch_s390 +#define ELF_TARGET_ID S390_ELF_DATA #define ELF_MACHINE_CODE EM_S390 #define ELF_MACHINE_ALT1 EM_S390_OLD #define ELF_MAXPAGESIZE 0x1000 @@ -3430,6 +3929,8 @@ const struct elf_size_info s390_elf64_size_info = #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup +#define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup +#define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol #define elf_backend_check_relocs elf_s390_check_relocs @@ -3442,8 +3943,10 @@ const struct elf_size_info s390_elf64_size_info = #define elf_backend_reloc_type_class elf_s390_reloc_type_class #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_init_index_section _bfd_elf_init_1_index_section #define elf_backend_plt_sym_val elf_s390_plt_sym_val +#define elf_backend_add_symbol_hook elf_s390_add_symbol_hook +#define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p #define bfd_elf64_mkobject elf_s390_mkobject #define elf_backend_object_p elf_s390_object_p