diff options
| author | Ian Lance Taylor <ian@airs.com> | 1996-01-11 21:06:42 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@airs.com> | 1996-01-11 21:06:42 +0000 |
| commit | 5b3b9ff61d3a2a6cdd90fcec1a61d38699f3c608 (patch) | |
| tree | 4a38d859537ed0e9e8ac23a9e6b9989bd9bd9d0d /bfd | |
| parent | f9407a89f45c77372d823af6a5aaffe23b2653b2 (diff) | |
| download | gdb-5b3b9ff61d3a2a6cdd90fcec1a61d38699f3c608.zip gdb-5b3b9ff61d3a2a6cdd90fcec1a61d38699f3c608.tar.gz gdb-5b3b9ff61d3a2a6cdd90fcec1a61d38699f3c608.tar.bz2 | |
* elf32-mips.c: Extensive changes for a start at dynamic linking
support, from Kazumoto Kojima <kkojima@info.kanagawa-u.ac.jp>.
* elf-bfd.h (struct elf_backend_data): Add type_change_ok field.
(struct elf_backend_data): Remove
elf_backend_create_program_headers field. Add
elf_backend_additional_program_headers and
elf_backend_modify_segment_map fields.
* elfxx-target.h (elf_backend_type_change_ok): Define if not
defined.
(elf_backend_additional_program_headers): Likewise.
(elf_backend_modify_segment_map): Likewise.
(elf_backend_create_program_headers): Don't define.
(elfNN_bed): Change to account for field changes.
* elf.c (assign_file_positions_for_segments): Call new
modify_segment_map backend function. Don't call old
create_program_headers backend function.
(get_program_header_size): Call additional_program_headers rather
than create_program_headers.
* elflink.h (elf_link_add_object_symbols): Initialize
type_change_ok from new backend field.
(elf_link_output_extsym): Don't warn if _rld_new_interface is
defined.
(elf_reloc_link_order): Treat a reloc against a defined symbol as
a reloc against the appropriate section.
Diffstat (limited to 'bfd')
| -rw-r--r-- | bfd/ChangeLog | 26 | ||||
| -rw-r--r-- | bfd/elf-bfd.h | 21 | ||||
| -rw-r--r-- | bfd/elf.c | 32 | ||||
| -rw-r--r-- | bfd/elf32-mips.c | 3076 | ||||
| -rw-r--r-- | bfd/elflink.h | 121 | ||||
| -rw-r--r-- | bfd/elfxx-target.h | 30 |
6 files changed, 3043 insertions, 263 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index ed63720..93c7d08 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,31 @@ Thu Jan 11 11:23:30 1996 Ian Lance Taylor <ian@cygnus.com> + * elf32-mips.c: Extensive changes for a start at dynamic linking + support, from Kazumoto Kojima <kkojima@info.kanagawa-u.ac.jp>. + + * elf-bfd.h (struct elf_backend_data): Add type_change_ok field. + (struct elf_backend_data): Remove + elf_backend_create_program_headers field. Add + elf_backend_additional_program_headers and + elf_backend_modify_segment_map fields. + * elfxx-target.h (elf_backend_type_change_ok): Define if not + defined. + (elf_backend_additional_program_headers): Likewise. + (elf_backend_modify_segment_map): Likewise. + (elf_backend_create_program_headers): Don't define. + (elfNN_bed): Change to account for field changes. + * elf.c (assign_file_positions_for_segments): Call new + modify_segment_map backend function. Don't call old + create_program_headers backend function. + (get_program_header_size): Call additional_program_headers rather + than create_program_headers. + * elflink.h (elf_link_add_object_symbols): Initialize + type_change_ok from new backend field. + (elf_link_output_extsym): Don't warn if _rld_new_interface is + defined. + (elf_reloc_link_order): Treat a reloc against a defined symbol as + a reloc against the appropriate section. + * elf-bfd.h (struct bfd_elf_section_data): Add tdata field. (struct elf_obj_tdata): Rename ppc_flags_init field to flags_init. (elf_flags_init): Rename from elf_ppc_flags_init. diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h index 75c8c5d..88e7858 100644 --- a/bfd/elf-bfd.h +++ b/bfd/elf-bfd.h @@ -212,6 +212,12 @@ struct elf_backend_data section. */ boolean collect; + /* This is true if the linker should ignore changes to the type of a + symbol. This is true for MIPS ELF because some Irix 5 objects + record undefined functions as STT_OBJECT although the definitions + are STT_FUNC. */ + boolean type_change_ok; + /* A function to translate an ELF RELA relocation to a BFD arelent structure. */ void (*elf_info_to_howto) PARAMS ((bfd *, arelent *, @@ -412,13 +418,14 @@ struct elf_backend_data void (*elf_backend_final_write_processing) PARAMS ((bfd *, boolean linker)); - /* A function to create any special program headers required by the - backend. PHDRS are the program headers, and PHDR_COUNT is the - number of them. If PHDRS is NULL, this just counts headers - without creating them. This returns an updated value for - PHDR_COUNT. */ - int (*elf_backend_create_program_headers) - PARAMS ((bfd *, Elf_Internal_Phdr *phdrs, int phdr_count)); + /* This function is called by get_program_header_size. It should + return the number of additional program segments which this BFD + will need. It should return -1 on error. */ + int (*elf_backend_additional_program_headers) PARAMS ((bfd *)); + + /* This function is called to modify an existing segment map in a + backend specific fashion. */ + boolean (*elf_backend_modify_segment_map) PARAMS ((bfd *)); /* The swapping table to use when dealing with ECOFF information. Used for the MIPS ELF .mdebug section. */ @@ -576,6 +576,7 @@ bfd_section_from_shdr (abfd, shindex) case SHT_DYNAMIC: /* Dynamic linking information. */ case SHT_NOBITS: /* .bss section. */ case SHT_HASH: /* .hash section. */ + case SHT_NOTE: /* .note section. */ return _bfd_elf_make_section_from_shdr (abfd, hdr, name); case SHT_SYMTAB: /* A symbol table */ @@ -752,9 +753,6 @@ bfd_section_from_shdr (abfd, shindex) } break; - case SHT_NOTE: - break; - case SHT_SHLIB: return true; @@ -1746,6 +1744,12 @@ assign_file_positions_for_segments (abfd) return false; } + if (bed->elf_backend_modify_segment_map) + { + if (! (*bed->elf_backend_modify_segment_map) (abfd)) + return false; + } + count = 0; for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) ++count; @@ -1757,11 +1761,6 @@ assign_file_positions_for_segments (abfd) if (count == 0) return true; - /* Let the backend count up any program headers it might need. */ - if (bed->elf_backend_create_program_headers) - count = ((*bed->elf_backend_create_program_headers) - (abfd, (Elf_Internal_Phdr *) NULL, count)); - /* If we already counted the number of program segments, make sure that we allocated enough space. This happens when SIZEOF_HEADERS is used in a linker script. */ @@ -1978,11 +1977,6 @@ assign_file_positions_for_segments (abfd) } } - /* Let the backend set up any program headers it might need. */ - if (bed->elf_backend_create_program_headers) - count = ((*bed->elf_backend_create_program_headers) - (abfd, phdrs, count)); - /* Clear out any program headers we allocated but did not use. */ for (; count < alloc; count++, p++) { @@ -2057,9 +2051,15 @@ get_program_header_size (abfd) } /* Let the backend count up any program headers it might need. */ - if (bed->elf_backend_create_program_headers) - segs = ((*bed->elf_backend_create_program_headers) - (abfd, (Elf_Internal_Phdr *) NULL, segs)); + if (bed->elf_backend_additional_program_headers) + { + int a; + + a = (*bed->elf_backend_additional_program_headers) (abfd); + if (a == -1) + abort (); + segs += a; + } elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr; return elf_tdata (abfd)->program_header_size; diff --git a/bfd/elf32-mips.c b/bfd/elf32-mips.c index 118ebb0..a45ae13 100644 --- a/bfd/elf32-mips.c +++ b/bfd/elf32-mips.c @@ -1,5 +1,5 @@ /* MIPS-specific support for 32-bit ELF - Copyright 1993, 1994, 1995 Free Software Foundation, Inc. + Copyright 1993, 1994, 1995, 1996 Free Software Foundation, Inc. Most of the information added by Ian Lance Taylor, Cygnus Support, <ian@cygnus.com>. @@ -20,6 +20,10 @@ 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. */ +/* This file handles MIPS ELF targets. SGI Irix 5 uses a slightly + different MIPS ELF from other targets. This matters when linking. + This file supports both, switching at runtime. */ + #include "bfd.h" #include "sysdep.h" #include "libbfd.h" @@ -65,12 +69,24 @@ static bfd_reloc_status_type mips_elf_gprel16_reloc PARAMS ((bfd *abfd, asection *section, bfd *output_bfd, char **error)); +static bfd_reloc_status_type mips_elf_gprel32_reloc PARAMS ((bfd *abfd, + arelent *reloc, + asymbol *symbol, + PTR data, + asection *section, + bfd *output_bfd, + char **error)); static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type)); static void mips_info_to_howto_rel PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); static boolean mips_elf_sym_is_global PARAMS ((bfd *, asymbol *)); static boolean mips_elf_object_p PARAMS ((bfd *)); +static boolean mips_elf_create_procedure_table + PARAMS ((PTR, bfd *, struct bfd_link_info *, asection *, + struct ecoff_debug_info *)); +static int mips_elf_additional_program_headers PARAMS ((bfd *)); +static boolean mips_elf_modify_segment_map PARAMS ((bfd *)); static void mips_elf_final_write_processing PARAMS ((bfd *, boolean)); static boolean mips_elf_section_from_shdr @@ -99,12 +115,180 @@ static boolean mips_elf_final_link static void mips_elf_relocate_hi16 PARAMS ((bfd *, Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_byte *, bfd_vma)); +static void mips_elf_relocate_got_local + PARAMS ((bfd *, bfd *, asection *, Elf_Internal_Rela *, + Elf_Internal_Rela *, bfd_byte *, bfd_vma)); +static void mips_elf_relocate_global_got + PARAMS ((bfd *, Elf_Internal_Rela *, bfd_byte *, bfd_vma)); +static boolean mips_elf_adjust_dynindx + PARAMS ((struct elf_link_hash_entry *, PTR)); static boolean mips_elf_relocate_section PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); static boolean mips_elf_add_symbol_hook PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, const char **, flagword *, asection **, bfd_vma *)); +static bfd_reloc_status_type mips_elf_final_gp + PARAMS ((bfd *, asymbol *, boolean, char **)); + +/* This is true for Irix 5 executables, false for normal MIPS ELF ABI + executables. FIXME: At the moment, we default to always generating + Irix 5 executables. */ + +#define SGI_COMPAT(abfd) (1) + +/* This structure is used to hold .got information when linking. It + is stored in the tdata field of the bfd_elf_section_data structure. */ + +struct mips_got_info +{ + /* The symbol index of the first global .got symbol. */ + unsigned long global_gotsym; + /* The number of local .got entries. */ + unsigned int local_gotno; +}; + +/* The number of local .got entries we reserve. */ +#define MIPS_RESERVED_GOTNO (2) + +/* Instructions which appear in a stub. For some reason the stub is + slightly different on an SGI system. */ +#define ELF_MIPS_GP_OFFSET(abfd) (SGI_COMPAT (abfd) ? 0x7ff0 : 0x8000) +#define STUB_LW(abfd) \ + (SGI_COMPAT (abfd) \ + ? 0x8f998010 /* lw t9,0x8010(gp) */ \ + : 0x8f998000) /* lw t9,0x8000(gp) */ +#define STUB_MOVE 0x03e07825 /* move t7,ra */ +#define STUB_JALR 0x0320f809 /* jal t9 */ +#define STUB_LI16 0x34180000 /* ori t8,zero,0 */ +#define MIPS_FUNCTION_STUB_SIZE (16) + +/* Names of sections which appear in the .dynsym section in an Irix 5 + executable. */ + +static const char * const mips_elf_dynsym_sec_names[] = +{ + ".text", + ".init", + ".fini", + ".data", + ".rodata", + ".sdata", + ".sbss", + ".bss", + NULL +}; + +#define SIZEOF_MIPS_DYNSYM_SECNAMES \ + (sizeof mips_elf_dynsym_sec_names / sizeof mips_elf_dynsym_sec_names[0]) + +/* The number of entries in mips_elf_dynsym_sec_names which go in the + text segment. */ + +#define MIPS_TEXT_DYNSYM_SECNO (3) + +/* The names of the runtime procedure table symbols used on Irix 5. */ + +static const char * const mips_elf_dynsym_rtproc_names[] = +{ + "_procedure_table", + "_procedure_string_table", + "_procedure_table_size", + NULL +}; + +/* These structures are used to generate the .compact_rel section on + Irix 5. */ + +typedef struct +{ + unsigned long id1; /* Always one? */ + unsigned long num; /* Number of compact relocation entries. */ + unsigned long id2; /* Always two? */ + unsigned long offset; /* The file offset of the first relocation. */ + unsigned long reserved0; /* Zero? */ + unsigned long reserved1; /* Zero? */ +} Elf32_compact_rel; + +typedef struct +{ + bfd_byte id1[4]; + bfd_byte num[4]; + bfd_byte id2[4]; + bfd_byte offset[4]; + bfd_byte reserved0[4]; + bfd_byte reserved1[4]; +} Elf32_External_compact_rel; + +typedef struct +{ + union { + struct { + unsigned long ctype : 1, /* 1: long 0: short format. See below. */ + rtype : 4, /* Relocation types. See below. */ + dist2to : 10, + relvaddr : 17; /* (VADDR - vaddr of theprevious entry) >> 2 */ + } b; + unsigned long l; + } info; + unsigned long konst; /* KONST field. See below. */ + unsigned long vaddr; /* VADDR to be relocated. */ +} Elf32_crinfo; + +typedef struct +{ + union { + struct { + unsigned long ctype : 1, /* 1: long 0: short format. See below. */ + rtype : 4, /* Relocation types. See below. */ + dist2to : 10, + relvaddr : 17; /* (VADDR - vaddr of the previous entry)/ 4 */ + } b; + unsigned long l; + } info; + unsigned long konst; /* KONST field. See below. */ +} Elf32_crinfo2; + +typedef struct +{ + bfd_byte info[4]; + bfd_byte konst[4]; + bfd_byte vaddr[4]; +} Elf32_External_crinfo; + +typedef struct +{ + bfd_byte info[4]; + bfd_byte konst[4]; +} Elf32_External_crinfo2; + +/* A compact relocation info has long (3 words) or short (2 words) + formats. A short format doesn't have VADDR field and relvaddr + fields contains ((VADDR - vaddr of the previous entry) >> 2). */ +#define CRF_MIPS_LONG 1 +#define CRF_MIPS_SHORT 0 + +/* There are 4 types of compact relocation at least. The value KONST + has different meaning for each type: + + (type) (konst) + CT_MIPS_REL32 Address in data + CT_MIPS_WORD Address in word (XXX) + CT_MIPS_GPHI_LO GP - vaddr + CT_MIPS_JMPAD Address to jump + */ + +#define CRT_MIPS_REL32 0xa +#define CRT_MIPS_WORD 0xb +#define CRT_MIPS_GPHI_LO 0xc +#define CRT_MIPS_JMPAD 0xd + +#define mips_elf_set_cr_format(x,format) ((x).info.b.ctype = (format)) +#define mips_elf_set_cr_type(x,type) ((x).info.b.rtype = (type)) +#define mips_elf_set_cr_dist2to(x,v) ((x).info.b.dist2to = (v)) +#define mips_elf_set_cr_relvaddr(x,d) ((x).info.b.relvaddr = (d)<<2) + + #define USE_REL 1 /* MIPS uses REL relocations instead of RELA */ @@ -273,7 +457,6 @@ static reloc_howto_type elf_mips_howto_table[] = false), /* pcrel_offset */ /* Reference to global offset table. */ - /* FIXME: This is not handled correctly. */ HOWTO (R_MIPS_GOT16, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ @@ -320,7 +503,6 @@ static reloc_howto_type elf_mips_howto_table[] = false), /* pcrel_offset */ /* 32 bit GP relative reference. */ - /* FIXME: This is not handled correctly. */ HOWTO (R_MIPS_GPREL32, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ @@ -328,7 +510,7 @@ static reloc_howto_type elf_mips_howto_table[] = false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ + mips_elf_gprel32_reloc, /* special_function */ "R_MIPS_GPREL32", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ @@ -540,20 +722,41 @@ mips_elf_hi16_reloc (abfd, return bfd_reloc_ok; } - /* FIXME: The symbol _gp_disp requires special handling, which we do - not do. */ + ret = bfd_reloc_ok; + if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) - abort (); + { + boolean relocateable; - ret = bfd_reloc_ok; - if (bfd_is_und_section (symbol->section) - && output_bfd == (bfd *) NULL) - ret = bfd_reloc_undefined; + if (ret == bfd_reloc_undefined) + abort (); - if (bfd_is_com_section (symbol->section)) - relocation = 0; + if (output_bfd != NULL) + relocateable = true; + else + { + relocateable = false; + output_bfd = symbol->section->output_section->owner; + } + + ret = mips_elf_final_gp (output_bfd, symbol, relocateable, + error_message); + if (ret != bfd_reloc_ok) + return ret; + + relocation = elf_gp (output_bfd) - reloc_entry->address; + } else - relocation = symbol->value; + { + if (bfd_is_und_section (symbol->section) + && output_bfd == (bfd *) NULL) + ret = bfd_reloc_undefined; + + if (bfd_is_com_section (symbol->section)) + relocation = 0; + else + relocation = symbol->value; + } relocation += symbol->section->output_section->vma; relocation += symbol->section->output_offset; @@ -592,11 +795,7 @@ mips_elf_lo16_reloc (abfd, bfd *output_bfd; char **error_message; { - /* FIXME: The symbol _gp_disp requires special handling, which we do - not do. */ - if (output_bfd == (bfd *) NULL - && strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) - abort (); + arelent gp_disp_relent; if (mips_hi16_addr != (bfd_byte *) NULL) { @@ -628,6 +827,36 @@ mips_elf_lo16_reloc (abfd, bfd_put_32 (abfd, insn, mips_hi16_addr); mips_hi16_addr = (bfd_byte *) NULL; + + if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) + { + gp_disp_relent = *reloc_entry; + reloc_entry = &gp_disp_relent; + reloc_entry->addend = mips_hi16_addend; + } + } + else if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) + { + bfd_reloc_status_type ret; + bfd_vma relocation; + + /* FIXME: Does this case ever occur? */ + + ret = mips_elf_final_gp (output_bfd, symbol, true, error_message); + if (ret != bfd_reloc_ok) + return ret; + + relocation = elf_gp (output_bfd) - reloc_entry->address; + relocation += symbol->section->output_section->vma; + relocation += symbol->section->output_offset; + relocation += reloc_entry->addend; + + if (reloc_entry->address > input_section->_cooked_size) + return bfd_reloc_outofrange; + + gp_disp_relent = *reloc_entry; + reloc_entry = &gp_disp_relent; + reloc_entry->addend = relocation - 4; } /* Now do the LO16 reloc in the usual way. */ @@ -685,72 +914,32 @@ mips_elf_got16_reloc (abfd, abort (); } -/* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must - become the offset from the gp register. This function also handles - R_MIPS_LITERAL relocations, although those can be handled more - cleverly because the entries in the .lit8 and .lit4 sections can be - merged. */ - -static bfd_reloc_status_type gprel16_with_gp PARAMS ((bfd *, asymbol *, - arelent *, asection *, - boolean, PTR, bfd_vma)); +/* We have to figure out the gp value, so that we can adjust the + symbol value correctly. We look up the symbol _gp in the output + BFD. If we can't find it, we're stuck. We cache it in the ELF + target data. We don't need to adjust the symbol value for an + external symbol if we are producing relocateable output. */ static bfd_reloc_status_type -mips_elf_gprel16_reloc (abfd, - reloc_entry, - symbol, - data, - input_section, - output_bfd, - error_message) - bfd *abfd; - arelent *reloc_entry; - asymbol *symbol; - PTR data; - asection *input_section; +mips_elf_final_gp (output_bfd, symbol, relocateable, error_message) bfd *output_bfd; + asymbol *symbol; + boolean relocateable; char **error_message; { - boolean relocateable; - - /* If we're relocating, and this is an external symbol with no - addend, we don't want to change anything. We will only have an - addend if this is a newly created reloc, not read from an ELF - file. */ - if (output_bfd != (bfd *) NULL - && (symbol->flags & BSF_SECTION_SYM) == 0 - && reloc_entry->addend == 0) - { - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; - } - - if (output_bfd != (bfd *) NULL) - relocateable = true; - else - { - relocateable = false; - output_bfd = symbol->section->output_section->owner; - } - if (bfd_is_und_section (symbol->section) - && relocateable == false) + && ! relocateable) return bfd_reloc_undefined; - /* Some of the code below assumes the output bfd is ELF too. */ + /* This doesn't work if the BFD is not ELF. */ if (output_bfd->xvec->flavour != bfd_target_elf_flavour) abort (); - /* We have to figure out the gp value, so that we can adjust the - symbol value correctly. We look up the symbol _gp in the output - BFD. If we can't find it, we're stuck. We cache it in the ELF - target data. We don't need to adjust the symbol value for an - external symbol if we are producing relocateable output. */ if (elf_gp (output_bfd) == 0 - && (relocateable == false + && (! relocateable || (symbol->flags & BSF_SECTION_SYM) != 0)) { - if (relocateable != false) + if (relocateable) { /* Make up a value. */ elf_gp (output_bfd) = @@ -793,6 +982,62 @@ mips_elf_gprel16_reloc (abfd, } } + return bfd_reloc_ok; +} + +/* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must + become the offset from the gp register. This function also handles + R_MIPS_LITERAL relocations, although those can be handled more + cleverly because the entries in the .lit8 and .lit4 sections can be + merged. */ + +static bfd_reloc_status_type gprel16_with_gp PARAMS ((bfd *, asymbol *, + arelent *, asection *, + boolean, PTR, bfd_vma)); + +static bfd_reloc_status_type +mips_elf_gprel16_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; +{ + boolean relocateable; + bfd_reloc_status_type ret; + + /* If we're relocating, and this is an external symbol with no + addend, we don't want to change anything. We will only have an + addend if this is a newly created reloc, not read from an ELF + file. */ + if (output_bfd != (bfd *) NULL + && (symbol->flags & BSF_SECTION_SYM) == 0 + && reloc_entry->addend == 0) + { + reloc_entry->address += input_section->output_offset; + return bfd_reloc_ok; + } + + if (output_bfd != (bfd *) NULL) + relocateable = true; + else + { + relocateable = false; + output_bfd = symbol->section->output_section->owner; + } + + ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message); + if (ret != bfd_reloc_ok) + return ret; + return gprel16_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data, elf_gp (output_bfd)); } @@ -833,14 +1078,14 @@ gprel16_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data, /* Adjust val for the final section location and GP value. If we are producing relocateable output, we don't want to do this for an external symbol. */ - if (relocateable == false + if (! relocateable || (symbol->flags & BSF_SECTION_SYM) != 0) val += relocation - gp; insn = (insn &~ 0xffff) | (val & 0xffff); bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); - if (relocateable != false) + if (relocateable) reloc_entry->address += input_section->output_offset; /* Make sure it fit in 16 bits. */ @@ -850,6 +1095,107 @@ gprel16_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data, return bfd_reloc_ok; } +/* Do a R_MIPS_GPREL32 relocation. Is this 32 bit value the offset + from the gp register? XXX */ + +static bfd_reloc_status_type gprel32_with_gp PARAMS ((bfd *, asymbol *, + arelent *, asection *, + boolean, PTR, bfd_vma)); + +static bfd_reloc_status_type +mips_elf_gprel32_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; +{ + boolean relocateable; + bfd_reloc_status_type ret; + + /* If we're relocating, and this is an external symbol with no + addend, we don't want to change anything. We will only have an + addend if this is a newly created reloc, not read from an ELF + file. */ + if (output_bfd != (bfd *) NULL + && (symbol->flags & BSF_SECTION_SYM) == 0 + && reloc_entry->addend == 0) + { + *error_message = (char *) + "32bits gp relative relocation occurs for an external symbol"; + return bfd_reloc_outofrange; + } + + if (output_bfd != (bfd *) NULL) + relocateable = true; + else + { + relocateable = false; + output_bfd = symbol->section->output_section->owner; + + ret = mips_elf_final_gp (output_bfd, symbol, relocateable, + error_message); + if (ret != bfd_reloc_ok) + return ret; + } + + return gprel32_with_gp (abfd, symbol, reloc_entry, input_section, + relocateable, data, elf_gp (output_bfd)); +} + +static bfd_reloc_status_type +gprel32_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data, + gp) + bfd *abfd; + asymbol *symbol; + arelent *reloc_entry; + asection *input_section; + boolean relocateable; + PTR data; + bfd_vma gp; +{ + bfd_vma relocation; + unsigned long val; + + if (bfd_is_com_section (symbol->section)) + relocation = 0; + else + relocation = symbol->value; + + relocation += symbol->section->output_section->vma; + relocation += symbol->section->output_offset; + + if (reloc_entry->address > input_section->_cooked_size) + return bfd_reloc_outofrange; + + val = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); + + /* Set val to the offset into the section or symbol. */ + val += reloc_entry->addend; + + /* Adjust val for the final section location and GP value. If we + are producing relocateable output, we don't want to do this for + an external symbol. */ + if (! relocateable + || (symbol->flags & BSF_SECTION_SYM) != 0) + val += relocation - gp; + + bfd_put_32 (abfd, val, (bfd_byte *) data + reloc_entry->address); + + if (relocateable) + reloc_entry->address += input_section->output_offset; + + return bfd_reloc_ok; +} + /* A mapping from BFD reloc types to MIPS ELF reloc types. */ struct elf_reloc_map { @@ -978,6 +1324,31 @@ bfd_mips_elf32_swap_gptab_out (abfd, in, ex) bfd_h_put_32 (abfd, (bfd_vma) in->gt_entry.gt_bytes, ex->gt_entry.gt_bytes); } + +static void +bfd_elf32_swap_compact_rel_out (abfd, in, ex) + bfd *abfd; + Elf32_compact_rel *in; + Elf32_External_compact_rel *ex; +{ + bfd_h_put_32 (abfd, (bfd_vma) in->id1, ex->id1); + bfd_h_put_32 (abfd, (bfd_vma) in->num, ex->num); + bfd_h_put_32 (abfd, (bfd_vma) in->id2, ex->id2); + bfd_h_put_32 (abfd, (bfd_vma) in->offset, ex->offset); + bfd_h_put_32 (abfd, (bfd_vma) in->reserved0, ex->reserved0); + bfd_h_put_32 (abfd, (bfd_vma) in->reserved1, ex->reserved1); +} + +static void +bfd_elf32_swap_crinfo_out (abfd, in, ex) + bfd *abfd; + Elf32_crinfo *in; + Elf32_External_crinfo *ex; +{ + bfd_h_put_32 (abfd, (bfd_vma) in->info.l, ex->info); + bfd_h_put_32 (abfd, (bfd_vma) in->konst, ex->konst); + bfd_h_put_32 (abfd, (bfd_vma) in->vaddr, ex->vaddr); +} /* Determine whether a symbol is global for the purposes of splitting the symbol table into global symbols and local symbols. At least @@ -1053,7 +1424,8 @@ mips_elf_final_write_processing (abfd, linker) break; default: - return; + val = 0; + break; } elf_elfheader (abfd)->e_flags &=~ EF_MIPS_ARCH; @@ -1080,6 +1452,119 @@ mips_elf_final_write_processing (abfd, linker) } } +/* Function to keep MIPS specific file flags like as EF_MIPS_PIC. */ + +static boolean +mips_elf_set_private_flags (abfd, flags) + bfd *abfd; + flagword flags; +{ + BFD_ASSERT (!elf_flags_init (abfd) + || elf_elfheader (abfd)->e_flags == flags); + + elf_elfheader (abfd)->e_flags = flags; + elf_flags_init (abfd) = true; + return true; +} + +/* Copy backend specific data from one object module to another */ + +static boolean +mips_elf_copy_private_bfd_data (ibfd, obfd) + bfd *ibfd; + bfd *obfd; +{ + /* This function is selected based on the input vector. We only + want to copy information over if the output BFD also uses Elf + format. */ + if (bfd_get_flavour (obfd) != bfd_target_elf_flavour) + return true; + + BFD_ASSERT (!elf_flags_init (obfd) + || (elf_elfheader (obfd)->e_flags + == elf_elfheader (ibfd)->e_flags)); + + elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; + elf_flags_init (obfd) = true; + return true; +} + +/* Merge backend specific data from an object file to the output + object file when linking. */ + +static boolean +mips_elf_merge_private_bfd_data (ibfd, obfd) + bfd *ibfd; + bfd *obfd; +{ + flagword old_flags; + flagword new_flags; + + /* Check if we have the same endianess */ + if (ibfd->xvec->byteorder != obfd->xvec->byteorder + && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN) + { + (*_bfd_error_handler) + ("%s: compiled for a %s endian system and target is %s endian", + bfd_get_filename (ibfd), + bfd_big_endian (ibfd) ? "big" : "little", + bfd_big_endian (obfd) ? "big" : "little"); + + bfd_set_error (bfd_error_wrong_format); + return false; + } + + /* This function is selected based on the input vector. We only + want to copy information over if the output BFD also uses Elf + format. */ + if (bfd_get_flavour (obfd) != bfd_target_elf_flavour) + return true; + + new_flags = elf_elfheader (ibfd)->e_flags; + elf_elfheader (obfd)->e_flags |= new_flags & EF_MIPS_NOREORDER; + old_flags = elf_elfheader (obfd)->e_flags; + + if (!elf_flags_init (obfd)) /* First call, no flags set */ + { + elf_flags_init (obfd) = true; + elf_elfheader (obfd)->e_flags = new_flags; + } + else if (((new_flags ^ old_flags) & ~EF_MIPS_NOREORDER) + == 0) /* Compatible flags are ok */ + ; + else /* Incompatible flags */ + { + /* Warn about -fPIC mismatch */ + if ((new_flags & EF_MIPS_PIC) != (old_flags & EF_MIPS_PIC)) + { + new_flags &= ~EF_MIPS_PIC; + (*_bfd_error_handler) + ("%s: needs all files compiled with -fPIC", + bfd_get_filename (ibfd)); + } + + if ((new_flags & EF_MIPS_CPIC) != (old_flags & EF_MIPS_CPIC)) + { + new_flags &= ~EF_MIPS_CPIC; + (*_bfd_error_handler) + ("%s: needs all files compiled with -mabicalls", + bfd_get_filename (ibfd)); + } + + /* Warn about any other mismatches */ + if (new_flags != old_flags) + (*_bfd_error_handler) + ("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)", + bfd_get_filename (ibfd), (unsigned long) new_flags, + (unsigned long) old_flags); + + bfd_set_error (bfd_error_bad_value); + return false; + } + + return true; +} + /* Handle a MIPS specific section when reading an object file. This is called when elfcode.h finds a section with an unknown type. FIXME: We need to handle the SHF_MIPS_GPREL flag, but I'm not sure @@ -1215,18 +1700,42 @@ mips_elf_fake_sections (abfd, hdr, sec) else if (strcmp (name, ".mdebug") == 0) { hdr->sh_type = SHT_MIPS_DEBUG; - hdr->sh_entsize = 1; + /* In a shared object on Irix 5.3, the .mdebug section has an + entsize of 0. FIXME: Does this matter? */ + if (SGI_COMPAT (abfd) && (abfd->flags & DYNAMIC) != 0) + hdr->sh_entsize = 0; + else + hdr->sh_entsize = 1; } else if (strcmp (name, ".reginfo") == 0) { hdr->sh_type = SHT_MIPS_REGINFO; - hdr->sh_entsize = 1; + /* In a shared object on Irix 5.3, the .reginfo section has an + entsize of 0x18. FIXME: Does this matter? */ + if (SGI_COMPAT (abfd) && (abfd->flags & DYNAMIC) != 0) + hdr->sh_entsize = sizeof (Elf32_External_RegInfo); + else + hdr->sh_entsize = 1; /* Force the section size to the correct value, even if the linker thinks it is larger. The link routine below will only write out this much data for .reginfo. */ hdr->sh_size = sec->_raw_size = sizeof (Elf32_External_RegInfo); } + else if (SGI_COMPAT (abfd) + && (strcmp (name, ".hash") == 0 + || strcmp (name, ".dynamic") == 0 + || strcmp (name, ".dynstr") == 0)) + { + hdr->sh_entsize = 0; + hdr->sh_info = SIZEOF_MIPS_DYNSYM_SECNAMES; + } + else if (strcmp (name, ".got") == 0 + || strcmp (name, ".sdata") == 0 + || strcmp (name, ".sbss") == 0 + || strcmp (name, ".lit4") == 0 + || strcmp (name, ".lit8") == 0) + hdr->sh_flags |= SHF_MIPS_GPREL; else if (strcmp (name, ".options") == 0) { hdr->sh_type = SHT_MIPS_OPTIONS; @@ -1309,6 +1818,22 @@ mips_elf_section_processing (abfd, hdr) hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; hdr->sh_type = SHT_PROGBITS; } + else if (strcmp (name, ".compact_rel") == 0) + { + hdr->sh_flags = 0; + hdr->sh_type = SHT_PROGBITS; + } + else if (strcmp (name, ".rtproc") == 0) + { + if (hdr->sh_addralign != 0 && hdr->sh_entsize == 0) + { + unsigned int adjust; + + adjust = hdr->sh_size % hdr->sh_addralign; + if (adjust != 0) + hdr->sh_size += hdr->sh_addralign - adjust; + } + } } return true; @@ -1330,6 +1855,18 @@ static asection mips_elf_acom_section; static asymbol mips_elf_acom_symbol; static asymbol *mips_elf_acom_symbol_ptr; +/* The Irix 5 support uses two virtual sections, which represent + text/data symbols defined in dynamic objects. */ +static asection mips_elf_text_section; +static asection *mips_elf_text_section_ptr; +static asymbol mips_elf_text_symbol; +static asymbol *mips_elf_text_symbol_ptr; + +static asection mips_elf_data_section; +static asection *mips_elf_data_section_ptr; +static asymbol mips_elf_data_symbol; +static asymbol *mips_elf_data_symbol_ptr; + /* Handle the special MIPS section numbers that a symbol may use. */ static void @@ -1391,7 +1928,252 @@ mips_elf_symbol_processing (abfd, asym) case SHN_MIPS_SUNDEFINED: asym->section = bfd_und_section_ptr; break; + +#if 0 /* for SGI_COMPAT */ + case SHN_MIPS_TEXT: + asym->section = mips_elf_text_section_ptr; + break; + + case SHN_MIPS_DATA: + asym->section = mips_elf_data_section_ptr; + break; +#endif + } +} + +/* When creating an Irix 5 executable, we need REGINFO and RTPROC + segments. */ + +static int +mips_elf_additional_program_headers (abfd) + bfd *abfd; +{ + asection *s; + int ret; + + ret = 0; + + if (! SGI_COMPAT (abfd)) + return ret; + + s = bfd_get_section_by_name (abfd, ".reginfo"); + if (s != NULL && (s->flags & SEC_LOAD) != 0) + { + /* We need a PT_MIPS_REGINFO segment. */ + ++ret; + } + + if (bfd_get_section_by_name (abfd, ".interp") == NULL + && bfd_get_section_by_name (abfd, ".dynamic") != NULL + && bfd_get_section_by_name (abfd, ".mdebug") != NULL) + { + /* We need a PT_MIPS_RTPROC segment. */ + ++ret; + } + + return ret; +} + +/* Modify the segment map for an Irix 5 executable. */ + +static boolean +mips_elf_modify_segment_map (abfd) + bfd *abfd; +{ + asection *s; + struct elf_segment_map *m, **pm; + + if (! SGI_COMPAT (abfd)) + return true; + + /* If there is a .reginfo section, we need a PT_MIPS_REGINFO + segment. */ + s = bfd_get_section_by_name (abfd, ".reginfo"); + if (s != NULL && (s->flags & SEC_LOAD) != 0) + { + for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) + if (m->p_type == PT_MIPS_REGINFO) + break; + if (m == NULL) + { + m = (struct elf_segment_map *) bfd_zalloc (abfd, sizeof *m); + if (m == NULL) + return false; + + m->p_type = PT_MIPS_REGINFO; + m->count = 1; + m->sections[0] = s; + + /* We want to put it after the PHDR and INTERP segments. */ + pm = &elf_tdata (abfd)->segment_map; + while (*pm != NULL + && ((*pm)->p_type == PT_PHDR + || (*pm)->p_type == PT_INTERP)) + pm = &(*pm)->next; + + m->next = *pm; + *pm = m; + } + } + + /* If there are .dynamic and .mdebug sections, we make a room for + the RTPROC header. FIXME: Rewrite without section names. */ + if (bfd_get_section_by_name (abfd, ".interp") == NULL + && bfd_get_section_by_name (abfd, ".dynamic") != NULL + && bfd_get_section_by_name (abfd, ".mdebug") != NULL) + { + for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) + if (m->p_type == PT_MIPS_RTPROC) + break; + if (m == NULL) + { + m = (struct elf_segment_map *) bfd_zalloc (abfd, sizeof *m); + if (m == NULL) + return false; + + m->p_type = PT_MIPS_RTPROC; + + s = bfd_get_section_by_name (abfd, ".rtproc"); + if (s == NULL) + { + m->count = 0; + m->p_flags = 0; + m->p_flags_valid = 1; + } + else + { + m->count = 1; + m->sections[0] = s; + } + + /* We want to put it after the DYNAMIC segment. */ + pm = &elf_tdata (abfd)->segment_map; + while (*pm != NULL && (*pm)->p_type != PT_DYNAMIC) + pm = &(*pm)->next; + if (*pm != NULL) + pm = &(*pm)->next; + + m->next = *pm; + *pm = m; + } + } + + /* On Irix 5, the PT_DYNAMIC segment includes the .dynamic, .dynstr, + .dynsym, and .hash sections, and everything in between. */ + for (pm = &elf_tdata (abfd)->segment_map; *pm != NULL; pm = &(*pm)->next) + if ((*pm)->p_type == PT_DYNAMIC) + break; + m = *pm; + if (m != NULL + && m->count == 1 + && strcmp (m->sections[0]->name, ".dynamic") == 0) + { + static const char *sec_names[] = + { ".dynamic", ".dynstr", ".dynsym", ".hash" }; + bfd_vma low, high; + unsigned int i, c; + struct elf_segment_map *n; + + low = 0xffffffff; + high = 0; + for (i = 0; i < sizeof sec_names / sizeof sec_names[0]; i++) + { + s = bfd_get_section_by_name (abfd, sec_names[i]); + if (s != NULL && (s->flags & SEC_LOAD) != 0) + { + bfd_size_type sz; + + if (low > s->vma) + low = s->vma; + sz = s->_cooked_size; + if (sz == 0) + sz = s->_raw_size; + if (high < s->vma + sz) + high = s->vma + sz; + } + } + + c = 0; + for (s = abfd->sections; s != NULL; s = s->next) + if ((s->flags & SEC_LOAD) != 0 + && s->vma >= low + && ((s->vma + + (s->_cooked_size != 0 ? s->_cooked_size : s->_raw_size)) + <= high)) + ++c; + + n = ((struct elf_segment_map *) + bfd_zalloc (abfd, sizeof *n + (c - 1) * sizeof (asection *))); + if (n == NULL) + return false; + *n = *m; + n->count = c; + + i = 0; + for (s = abfd->sections; s != NULL; s = s->next) + { + if ((s->flags & SEC_LOAD) != 0 + && s->vma >= low + && ((s->vma + + (s->_cooked_size != 0 ? s->_cooked_size : s->_raw_size)) + <= high)) + { + n->sections[i] = s; + ++i; + } + } + + *pm = n; } + + return true; +} + +/* The structure of the runtime procedure descriptor created by the + loader for use by the static exception system. */ + +typedef struct runtime_pdr { + bfd_vma adr; /* memory address of start of procedure */ + long regmask; /* save register mask */ + long regoffset; /* save register offset */ + long fregmask; /* save floating point register mask */ + long fregoffset; /* save floating point register offset */ + long frameoffset; /* frame size */ + short framereg; /* frame pointer register */ + short pcreg; /* offset or reg of return pc */ + long irpss; /* index into the runtime string table */ + long reserved; + struct exception_info *exception_info;/* pointer to exception array */ +} RPDR, *pRPDR; +#define cbRPDR sizeof(RPDR) +#define rpdNil ((pRPDR) 0) + +/* Swap RPDR (runtime procedure table entry) for output. */ + +static void ecoff_swap_rpdr_out + PARAMS ((bfd *, const RPDR *, struct rpdr_ext *)); + +static void +ecoff_swap_rpdr_out (abfd, in, ex) + bfd *abfd; + const RPDR *in; + struct rpdr_ext *ex; +{ + /* ecoff_put_off was defined in ecoffswap.h. */ + ecoff_put_off (abfd, in->adr, (bfd_byte *) ex->p_adr); + bfd_h_put_32 (abfd, in->regmask, (bfd_byte *) ex->p_regmask); + bfd_h_put_32 (abfd, in->regoffset, (bfd_byte *) ex->p_regoffset); + bfd_h_put_32 (abfd, in->fregmask, (bfd_byte *) ex->p_fregmask); + bfd_h_put_32 (abfd, in->fregoffset, (bfd_byte *) ex->p_fregoffset); + bfd_h_put_32 (abfd, in->frameoffset, (bfd_byte *) ex->p_frameoffset); + + bfd_h_put_16 (abfd, in->framereg, (bfd_byte *) ex->p_framereg); + bfd_h_put_16 (abfd, in->pcreg, (bfd_byte *) ex->p_pcreg); + + bfd_h_put_32 (abfd, in->irpss, (bfd_byte *) ex->p_irpss); +#if 0 /* FIXME */ + ecoff_put_off (abfd, in->exception_info, (bfd_byte *) ex->p_exception_info); +#endif } /* Read ECOFF debugging information from a .mdebug section into a @@ -1409,12 +2191,9 @@ mips_elf_read_ecoff_info (abfd, section, debug) swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; - ext_hdr = (char *) malloc ((size_t) swap->external_hdr_size); + ext_hdr = (char *) bfd_malloc ((size_t) swap->external_hdr_size); if (ext_hdr == NULL && swap->external_hdr_size != 0) - { - bfd_set_error (bfd_error_no_memory); - goto error_return; - } + goto error_return; if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0, swap->external_hdr_size) @@ -1431,12 +2210,9 @@ mips_elf_read_ecoff_info (abfd, section, debug) debug->ptr = NULL; \ else \ { \ - debug->ptr = (type) malloc ((size_t) (size * symhdr->count)); \ + debug->ptr = (type) bfd_malloc ((size_t) (size * symhdr->count)); \ if (debug->ptr == NULL) \ - { \ - bfd_set_error (bfd_error_no_memory); \ - goto error_return; \ - } \ + goto error_return; \ if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \ || (bfd_read (debug->ptr, size, symhdr->count, \ abfd) != size * symhdr->count)) \ @@ -1624,6 +2400,10 @@ struct mips_elf_link_hash_entry struct mips_elf_link_hash_table { struct elf_link_hash_table root; + /* String section indices for the dynamic section symbols. */ + bfd_size_type dynsym_sec_strindex[SIZEOF_MIPS_DYNSYM_SECNAMES]; + /* The number of .rtproc entries. */ + bfd_size_type procedure_count; }; /* Look up an entry in a MIPS ELF linker hash table. */ @@ -1692,6 +2472,7 @@ mips_elf_link_hash_table_create (abfd) bfd *abfd; { struct mips_elf_link_hash_table *ret; + unsigned int i; ret = ((struct mips_elf_link_hash_table *) bfd_alloc (abfd, sizeof (struct mips_elf_link_hash_table))); @@ -1705,6 +2486,10 @@ mips_elf_link_hash_table_create (abfd) return NULL; } + for (i = 0; i < SIZEOF_MIPS_DYNSYM_SECNAMES; i++) + ret->dynsym_sec_strindex[i] = (bfd_size_type) -1; + ret->procedure_count = 0; + return &ret->root.root; } @@ -1736,6 +2521,52 @@ mips_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) *valp = sym->st_size; break; + case SHN_MIPS_TEXT: + /* This section is used in a shared object. */ + if (mips_elf_text_section_ptr == NULL) + { + /* Initialize the section. */ + mips_elf_text_section.name = ".text"; + mips_elf_text_section.flags = SEC_NO_FLAGS; + mips_elf_text_section.output_section = NULL; + mips_elf_text_section.owner = abfd; + mips_elf_text_section.symbol = &mips_elf_text_symbol; + mips_elf_text_section.symbol_ptr_ptr = &mips_elf_text_symbol_ptr; + mips_elf_text_symbol.name = ".text"; + mips_elf_text_symbol.flags = BSF_SECTION_SYM; + mips_elf_text_symbol.section = &mips_elf_text_section; + mips_elf_text_symbol_ptr = &mips_elf_text_symbol; + mips_elf_text_section_ptr = &mips_elf_text_section; + } + if (info->shared) + *secp = bfd_und_section_ptr; + else + *secp = mips_elf_text_section_ptr; + break; + + case SHN_MIPS_DATA: + /* This section is used in a shared object. */ + if (mips_elf_data_section_ptr == NULL) + { + /* Initialize the section. */ + mips_elf_data_section.name = ".data"; + mips_elf_data_section.flags = SEC_NO_FLAGS; + mips_elf_data_section.output_section = NULL; + mips_elf_data_section.owner = abfd; + mips_elf_data_section.symbol = &mips_elf_data_symbol; + mips_elf_data_section.symbol_ptr_ptr = &mips_elf_data_symbol_ptr; + mips_elf_data_symbol.name = ".data"; + mips_elf_data_symbol.flags = BSF_SECTION_SYM; + mips_elf_data_symbol.section = &mips_elf_data_section; + mips_elf_data_symbol_ptr = &mips_elf_data_symbol; + mips_elf_data_section_ptr = &mips_elf_data_section; + } + if (info->shared) + *secp = bfd_und_section_ptr; + else + *secp = mips_elf_data_section_ptr; + break; + case SHN_MIPS_SUNDEFINED: *secp = bfd_und_section_ptr; break; @@ -1776,6 +2607,7 @@ mips_elf_output_extsym (h, data) { struct extsym_info *einfo = (struct extsym_info *) data; boolean strip; + asection *sec, *output_section; if (h->root.indx == -2) strip = false; @@ -1806,36 +2638,76 @@ mips_elf_output_extsym (h, data) h->esym.asym.value = 0; h->esym.asym.st = stGlobal; - if (h->root.root.type != bfd_link_hash_defined + if (SGI_COMPAT (einfo->abfd) + && (h->root.root.type == bfd_link_hash_undefined + || h->root.root.type == bfd_link_hash_undefweak)) + { + const char *name; + + /* Use undefined class. Also, set class and type for some + special symbols. */ + name = h->root.root.root.string; + if (strcmp (name, mips_elf_dynsym_rtproc_names[0]) == 0 + || strcmp (name, mips_elf_dynsym_rtproc_names[1]) == 0) + { + h->esym.asym.sc = scData; + h->esym.asym.st = stLabel; + h->esym.asym.value = 0; + } + else if (strcmp (name, mips_elf_dynsym_rtproc_names[2]) == 0) + { + h->esym.asym.sc = scAbs; + h->esym.asym.st = stLabel; + h->esym.asym.value = + mips_elf_hash_table (einfo->info)->procedure_count; + } + else if (strcmp (name, "_gp_disp") == 0) + { + h->esym.asym.sc = scAbs; + h->esym.asym.st = stLabel; + h->esym.asym.value = elf_gp (einfo->abfd); + } + else + h->esym.asym.sc = scUndefined; + } + else if (h->root.root.type != bfd_link_hash_defined && h->root.root.type != bfd_link_hash_defweak) h->esym.asym.sc = scAbs; else { - asection *output_section; const char *name; - output_section = h->root.root.u.def.section->output_section; - name = bfd_section_name (output_section->owner, output_section); - - if (strcmp (name, ".text") == 0) - h->esym.asym.sc = scText; - else if (strcmp (name, ".data") == 0) - h->esym.asym.sc = scData; - else if (strcmp (name, ".sdata") == 0) - h->esym.asym.sc = scSData; - else if (strcmp (name, ".rodata") == 0 - || strcmp (name, ".rdata") == 0) - h->esym.asym.sc = scRData; - else if (strcmp (name, ".bss") == 0) - h->esym.asym.sc = scBss; - else if (strcmp (name, ".sbss") == 0) - h->esym.asym.sc = scSBss; - else if (strcmp (name, ".init") == 0) - h->esym.asym.sc = scInit; - else if (strcmp (name, ".fini") == 0) - h->esym.asym.sc = scFini; + sec = h->root.root.u.def.section; + output_section = sec->output_section; + + /* When making a shared library and symbol h is the one from + the another shared library, OUTPUT_SECTION may be null. */ + if (output_section == NULL) + h->esym.asym.sc = scUndefined; else - h->esym.asym.sc = scAbs; + { + name = bfd_section_name (output_section->owner, output_section); + + if (strcmp (name, ".text") == 0) + h->esym.asym.sc = scText; + else if (strcmp (name, ".data") == 0) + h->esym.asym.sc = scData; + else if (strcmp (name, ".sdata") == 0) + h->esym.asym.sc = scSData; + else if (strcmp (name, ".rodata") == 0 + || strcmp (name, ".rdata") == 0) + h->esym.asym.sc = scRData; + else if (strcmp (name, ".bss") == 0) + h->esym.asym.sc = scBss; + else if (strcmp (name, ".sbss") == 0) + h->esym.asym.sc = scSBss; + else if (strcmp (name, ".init") == 0) + h->esym.asym.sc = scInit; + else if (strcmp (name, ".fini") == 0) + h->esym.asym.sc = scFini; + else + h->esym.asym.sc = scAbs; + } } h->esym.asym.reserved = 0; @@ -1847,18 +2719,41 @@ mips_elf_output_extsym (h, data) else if (h->root.root.type == bfd_link_hash_defined || h->root.root.type == bfd_link_hash_defweak) { - asection *sec; - if (h->esym.asym.sc == scCommon) h->esym.asym.sc = scBss; else if (h->esym.asym.sc == scSCommon) h->esym.asym.sc = scSBss; sec = h->root.root.u.def.section; - h->esym.asym.value = (h->root.root.u.def.value - + sec->output_offset - + sec->output_section->vma); + output_section = sec->output_section; + if (output_section != NULL) + h->esym.asym.value = (h->root.root.u.def.value + + sec->output_offset + + output_section->vma); + else + h->esym.asym.value = 0; } + else if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) + { + /* Set type and value for a symbol with a function stub. */ + h->esym.asym.st = stProc; + sec = h->root.root.u.def.section; + if (sec == NULL) + h->esym.asym.value = 0; + else + { + output_section = sec->output_section; + if (output_section != NULL) + h->esym.asym.value = (h->root.plt_offset + + sec->output_offset + + output_section->vma); + else + h->esym.asym.value = 0; + } +#if 0 /* FIXME? */ + h->esym.ifd = 0; +#endif + } if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap, h->root.root.root.string, @@ -1871,6 +2766,151 @@ mips_elf_output_extsym (h, data) return true; } +/* Create a runtime procedure table from the .mdebug section. */ + +static boolean +mips_elf_create_procedure_table (handle, abfd, info, s, debug) + PTR handle; + bfd *abfd; + struct bfd_link_info *info; + asection *s; + struct ecoff_debug_info *debug; +{ + const struct ecoff_debug_swap *swap; + HDRR *hdr = &debug->symbolic_header; + RPDR *rpdr, *rp; + struct rpdr_ext *erp; + PTR rtproc; + struct pdr_ext *epdr; + struct sym_ext *esym; + char *ss, **sv; + char *str; + unsigned long size, count; + unsigned long sindex; + unsigned long i; + PDR pdr; + SYMR sym; + const char *no_name_func = "static procedure (no name)"; + + epdr = NULL; + rpdr = NULL; + esym = NULL; + ss = NULL; + + swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; + + sindex = strlen (no_name_func) + 1; + count = hdr->ipdMax; + if (count > 0) + { + size = swap->external_pdr_size; + + epdr = (struct pdr_ext *) bfd_malloc (size * count); + if (epdr == NULL) + goto error_return; + + if (! _bfd_ecoff_get_accumulated_pdr (handle, (PTR) epdr)) + goto error_return; + + size = sizeof (RPDR); + rp = rpdr = (RPDR *) bfd_malloc (size * count); + if (rpdr == NULL) + goto error_return; + + sv = (char **) bfd_malloc (sizeof (char *) * count); + if (sv == NULL) + goto error_return; + + count = hdr->isymMax; + size = swap->external_sym_size; + esym = (struct sym_ext *) bfd_malloc (size * count); + if (esym == NULL) + goto error_return; + + if (! _bfd_ecoff_get_accumulated_sym (handle, (PTR) esym)) + goto error_return; + + count = hdr->issMax; + ss = (char *) bfd_malloc (count); + if (ss == NULL) + goto error_return; + if (! _bfd_ecoff_get_accumulated_ss (handle, (PTR) ss)) + goto error_return; + + count = hdr->ipdMax; + for (i = 0; i < count; i++, rp++, epdr++) + { + (*swap->swap_pdr_in) (abfd, (PTR) epdr, &pdr); + (*swap->swap_sym_in) (abfd, (PTR) &esym[pdr.isym], &sym); + rp->adr = sym.value; + rp->regmask = pdr.regmask; + rp->regoffset = pdr.regoffset; + rp->fregmask = pdr.fregmask; + rp->fregoffset = pdr.fregoffset; + rp->frameoffset = pdr.frameoffset; + rp->framereg = pdr.framereg; + rp->pcreg = pdr.pcreg; + rp->irpss = sindex; + sv[i] = ss + sym.iss; + sindex += strlen (sv[i]) + 1; + } + } + + size = sizeof (struct rpdr_ext) * (count + 2) + sindex; + size = BFD_ALIGN (size, 16); + rtproc = (PTR) bfd_alloc (abfd, size); + if (rtproc == NULL) + { + mips_elf_hash_table (info)->procedure_count = 0; + goto error_return; + } + + mips_elf_hash_table (info)->procedure_count = count + 2; + + erp = (struct rpdr_ext *) rtproc; + memset (rp, 0, sizeof (struct rpdr_ext)); + erp++; + str = (char *) rtproc + sizeof (struct rpdr_ext) * (count + 2); + strcpy (str, no_name_func); + str += strlen (no_name_func) + 1; + for (i = 0; i < count; i++) + { + ecoff_swap_rpdr_out (abfd, rpdr + i, erp + i); + strcpy (str, sv[i]); + str += strlen (sv[i]) + 1; + } + ecoff_put_off (abfd, (bfd_vma) -1, (bfd_byte *) (erp + count)->p_adr); + + /* Set the size and contents of .rtproc section. */ + s->_raw_size = size; + s->contents = rtproc; + + /* Skip this section later on (I don't think this currently + matters, but someday it might). */ + s->link_order_head = (struct bfd_link_order *) NULL; + + free (epdr); + free (rpdr); + free (esym); + free (ss); + free (sv); + + return true; + + error_return: + if (epdr != NULL) + free (epdr); + if (rpdr != NULL) + free (rpdr); + if (esym != NULL) + free (esym); + if (ss != NULL) + free (ss); + if (sv != NULL) + free (sv); + return false; +} + /* A comparison routine used to sort .gptab entries. */ static int @@ -1897,6 +2937,7 @@ mips_elf_final_link (abfd, info) asection *o; struct bfd_link_order *p; asection *reginfo_sec, *mdebug_sec, *gptab_data_sec, *gptab_bss_sec; + asection *rtproc_sec; Elf32_RegInfo reginfo; struct ecoff_debug_info debug; const struct ecoff_debug_swap *swap @@ -1920,6 +2961,42 @@ mips_elf_final_link (abfd, info) } } + /* Get a value for the GP register. */ + if (elf_gp (abfd) == 0) + { + struct bfd_link_hash_entry *h; + + h = bfd_link_hash_lookup (info->hash, "_gp", false, false, true); + if (h != (struct bfd_link_hash_entry *) NULL + && h->type == bfd_link_hash_defined) + elf_gp (abfd) = (h->u.def.value + + h->u.def.section->output_section->vma + + h->u.def.section->output_offset); + else if (info->relocateable) + { + bfd_vma lo; + + /* Make up a value. */ + lo = (bfd_vma) -1; + for (o = abfd->sections; o != (asection *) NULL; o = o->next) + { + if (o->vma < lo + && (strcmp (o->name, ".sbss") == 0 + || strcmp (o->name, ".sdata") == 0 + || strcmp (o->name, ".lit4") == 0 + || strcmp (o->name, ".lit8") == 0)) + lo = o->vma; + } + elf_gp (abfd) = lo + ELF_MIPS_GP_OFFSET (abfd); + } + else + { + /* If the relocate_section function needs to do a reloc + involving the GP value, it should make a reloc_dangerous + callback to warn that GP is not defined. */ + } + } + /* Go through the sections and collect the .reginfo and .mdebug information. */ reginfo_sec = NULL; @@ -2033,6 +3110,45 @@ mips_elf_final_link (abfd, info) if (mdebug_handle == (PTR) NULL) return false; + if (SGI_COMPAT (abfd)) + { + asection *s; + EXTR esym; + bfd_vma last; + unsigned int i; + static const char * const name[] = + { ".text", ".init", ".fini", ".data", + ".rodata", ".sdata", ".sbss", ".bss" }; + static const int sc[] = { scText, scInit, scFini, scData, + scRData, scSData, scSBss, scBss }; + + esym.jmptbl = 0; + esym.cobol_main = 0; + esym.weakext = 0; + esym.reserved = 0; + esym.ifd = ifdNil; + esym.asym.iss = issNil; + esym.asym.st = stLocal; + esym.asym.reserved = 0; + esym.asym.index = indexNil; + for (i = 0; i < 8; i++) + { + esym.asym.sc = sc[i]; + s = bfd_get_section_by_name (abfd, name[i]); + if (s != NULL) + { + esym.asym.value = s->vma; + last = s->vma + s->_raw_size; + } + else + esym.asym.value = last; + + if (! bfd_ecoff_debug_one_external (abfd, &debug, swap, + name[i], &esym)) + return false; + } + } + for (p = o->link_order_head; p != (struct bfd_link_order *) NULL; p = p->next) @@ -2137,6 +3253,27 @@ mips_elf_final_link (abfd, info) input_section->flags &=~ SEC_HAS_CONTENTS; } + if (SGI_COMPAT (abfd) && info->shared) + { + /* Create .rtproc section. */ + rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc"); + if (rtproc_sec == NULL) + { + flagword flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_READONLY); + + rtproc_sec = bfd_make_section (abfd, ".rtproc"); + if (rtproc_sec == NULL + || ! bfd_set_section_flags (abfd, rtproc_sec, flags) + || ! bfd_set_section_alignment (abfd, rtproc_sec, 12)) + return false; + } + + if (! mips_elf_create_procedure_table (mdebug_handle, abfd, + info, rtproc_sec, &debug)) + return false; + } + /* Build the external symbol information. */ einfo.abfd = abfd; einfo.info = info; @@ -2243,12 +3380,9 @@ mips_elf_final_link (abfd, info) /* Set up the first entry. */ c = 1; - tab = (Elf32_gptab *) malloc (c * sizeof (Elf32_gptab)); + tab = (Elf32_gptab *) bfd_malloc (c * sizeof (Elf32_gptab)); if (tab == NULL) - { - bfd_set_error (bfd_error_no_memory); - return false; - } + return false; tab[0].gt_header.gt_current_g_value = elf_gp_size (abfd); tab[0].gt_header.gt_unused = 0; @@ -2319,11 +3453,10 @@ mips_elf_final_link (abfd, info) /* We need a new table entry. */ new_tab = ((Elf32_gptab *) - realloc ((PTR) tab, - (c + 1) * sizeof (Elf32_gptab))); + bfd_realloc ((PTR) tab, + (c + 1) * sizeof (Elf32_gptab))); if (new_tab == NULL) { - bfd_set_error (bfd_error_no_memory); free (tab); return false; } @@ -2384,42 +3517,6 @@ mips_elf_final_link (abfd, info) } } - /* Get a value for the GP register. */ - if (elf_gp (abfd) == 0) - { - struct bfd_link_hash_entry *h; - - h = bfd_link_hash_lookup (info->hash, "_gp", false, false, true); - if (h != (struct bfd_link_hash_entry *) NULL - && h->type == bfd_link_hash_defined) - elf_gp (abfd) = (h->u.def.value - + h->u.def.section->output_section->vma - + h->u.def.section->output_offset); - else if (info->relocateable) - { - bfd_vma lo; - - /* Make up a value. */ - lo = (bfd_vma) -1; - for (o = abfd->sections; o != (asection *) NULL; o = o->next) - { - if (o->vma < lo - && (strcmp (o->name, ".sbss") == 0 - || strcmp (o->name, ".sdata") == 0 - || strcmp (o->name, ".lit4") == 0 - || strcmp (o->name, ".lit8") == 0)) - lo = o->vma; - } - elf_gp (abfd) = lo + 0x8000; - } - else - { - /* If the relocate_section function needs to do a reloc - involving the GP value, it should make a reloc_dangerous - callback to warn that GP is not defined. */ - } - } - /* Invoke the regular ELF backend linker to do all the work. */ if (! bfd_elf32_bfd_final_link (abfd, info)) return false; @@ -2465,6 +3562,19 @@ mips_elf_final_link (abfd, info) return false; } + if (SGI_COMPAT (abfd)) + { + rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc"); + if (rtproc_sec != NULL) + { + if (! bfd_set_section_contents (abfd, rtproc_sec, + rtproc_sec->contents, + (file_ptr) 0, + rtproc_sec->_raw_size)) + return false; + } + } + return true; } @@ -2498,6 +3608,91 @@ mips_elf_relocate_hi16 (input_bfd, relhi, rello, contents, addend) contents + relhi->r_offset); } +/* Handle a MIPS ELF local GOT16 reloc. */ + +static void +mips_elf_relocate_got_local (output_bfd, input_bfd, sgot, relhi, rello, + contents, addend) + bfd *output_bfd; + bfd *input_bfd; + asection *sgot; + Elf_Internal_Rela *relhi; + Elf_Internal_Rela *rello; + bfd_byte *contents; + bfd_vma addend; +{ + int local_gotno; + int i; + bfd_vma insn; + bfd_vma addlo; + bfd_vma address; + bfd_vma hipage; + bfd_byte *got_contents; + struct mips_got_info *g; + + insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); + + addlo = bfd_get_32 (input_bfd, contents + rello->r_offset); + addlo &= 0xffff; + + addend += ((insn & 0xffff) << 16) + addlo; + + if ((addlo & 0x8000) != 0) + addend -= 0x10000; + if ((addend & 0x8000) != 0) + addend += 0x10000; + + /* Get a got entry representing requested hipage. */ + BFD_ASSERT (elf_section_data (sgot) != NULL); + g = (struct mips_got_info *) elf_section_data (sgot)->tdata; + BFD_ASSERT (g != NULL); + + local_gotno = g->local_gotno; + got_contents = sgot->contents; + hipage = addend & 0xffff0000; + + for (i = MIPS_RESERVED_GOTNO; i < local_gotno; i++) + { + address = bfd_get_32 (input_bfd, got_contents + i * 4); + if (hipage == (address & 0xffff0000)) + break; + if (address == (bfd_vma) 0) + { + bfd_put_32 (input_bfd, hipage, got_contents + i * 4); + break; + } + } + + BFD_ASSERT (i < local_gotno); +#if 1 + if (i == local_gotno) + (*_bfd_error_handler) + ("ELF MIPS linker: more got entries are needed for hipage: %x", + hipage); +#endif + + i = - ELF_MIPS_GP_OFFSET (output_bfd) + i * 4; + bfd_put_32 (input_bfd, (insn & 0xffff0000) | (i & 0xffff), + contents + relhi->r_offset); +} + +/* Handle MIPS ELF CALL16 reloc and global GOT16 reloc. */ + +static void +mips_elf_relocate_global_got (input_bfd, rel, contents, offset) + bfd *input_bfd; + Elf_Internal_Rela *rel; + bfd_byte *contents; + bfd_vma offset; +{ + bfd_vma insn; + + insn = bfd_get_32 (input_bfd, contents + rel->r_offset); + bfd_put_32 (input_bfd, + (insn & 0xffff0000) | (offset & 0xffff), + contents + rel->r_offset); +} + /* Relocate a MIPS ELF section. */ static boolean @@ -2515,11 +3710,23 @@ mips_elf_relocate_section (output_bfd, info, input_bfd, input_section, Elf_Internal_Shdr *symtab_hdr; size_t locsymcount; size_t extsymoff; + asection *sgot, *sreloc, *scpt; + bfd *dynobj; Elf_Internal_Rela *rel; Elf_Internal_Rela *relend; + struct mips_got_info *g; + dynobj = elf_hash_table (info)->dynobj; symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + sgot = NULL; + sreloc = NULL; + if (dynobj == NULL || ! SGI_COMPAT (output_bfd)) + scpt = NULL; + else + scpt = bfd_get_section_by_name (dynobj, ".compact_rel"); + g = NULL; + if (elf_bad_symtab (input_bfd)) { locsymcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym); @@ -2552,6 +3759,25 @@ mips_elf_relocate_section (output_bfd, info, input_bfd, input_section, } howto = elf_mips_howto_table + r_type; + if (dynobj != NULL + && (r_type == R_MIPS_CALL16 + || r_type == R_MIPS_GOT16 + || r_type == R_MIPS_CALL_HI16 + || r_type == R_MIPS_CALL_LO16 + || r_type == R_MIPS_GOT_HI16 + || r_type == R_MIPS_GOT_LO16)) + { + /* We need the .got section. */ + if (sgot == NULL) + { + sgot = bfd_get_section_by_name (dynobj, ".got"); + BFD_ASSERT (sgot != NULL); + BFD_ASSERT (elf_section_data (sgot) != NULL); + g = (struct mips_got_info *) elf_section_data (sgot)->tdata; + BFD_ASSERT (g != NULL); + } + } + r_symndx = ELF32_R_SYM (rel->r_info); /* Mix in the change in GP address for a GP relative reloc. */ @@ -2631,10 +3857,10 @@ mips_elf_relocate_section (output_bfd, info, input_bfd, input_section, value. */ addend += sec->output_offset; - /* If this is HI16 with an associated LO16, adjust - the addend accordingly. Otherwise, just + /* If this is HI16 or GOT16 with an associated LO16, + adjust the addend accordingly. Otherwise, just relocate. */ - if (r_type != R_MIPS_HI16 + if ((r_type != R_MIPS_HI16 || r_type == R_MIPS_GOT16) || (rel + 1) >= relend || ELF32_R_TYPE ((rel + 1)->r_info) != R_MIPS_LO16) r = _bfd_relocate_contents (howto, input_bfd, @@ -2652,6 +3878,7 @@ mips_elf_relocate_section (output_bfd, info, input_bfd, input_section, else { bfd_vma relocation; + boolean local; /* This is a final link. */ sym = NULL; @@ -2659,6 +3886,7 @@ mips_elf_relocate_section (output_bfd, info, input_bfd, input_section, || (elf_bad_symtab (input_bfd) && local_sections[r_symndx] != NULL)) { + local = true; sym = local_syms + r_symndx; sec = local_sections[r_symndx]; relocation = (sec->output_section->vma @@ -2674,18 +3902,52 @@ mips_elf_relocate_section (output_bfd, info, input_bfd, input_section, { long indx; + local = false; indx = r_symndx - extsymoff; h = elf_sym_hashes (input_bfd)[indx]; - if (h->root.type == bfd_link_hash_defined + if (strcmp (h->root.root.string, "_gp_disp") == 0) + { + if (elf_gp (output_bfd) == 0) + { + if (! ((*info->callbacks->reloc_dangerous) + (info, + "_gp_disp used when GP not defined", + input_bfd, input_section, + rel->r_offset))) + return false; + /* Only give the error once per link. */ + elf_gp (output_bfd) = 4; + relocation = 0; + } + else + { + sec = input_section; + if (sec->output_section != NULL) + relocation = (elf_gp (output_bfd) + - (rel->r_offset + + sec->output_section->vma + + sec->output_offset)); + else + relocation = elf_gp (output_bfd) - rel->r_offset; + if (r_type == R_MIPS_LO16) + relocation += 4; + } + } + else if (h->root.type == bfd_link_hash_defined || h->root.type == bfd_link_hash_defweak) { sec = h->root.u.def.section; - relocation = (h->root.u.def.value - + sec->output_section->vma - + sec->output_offset); + if (sec->output_section == NULL) + relocation = 0; + else + relocation = (h->root.u.def.value + + sec->output_section->vma + + sec->output_offset); } else if (h->root.type == bfd_link_hash_undefweak) relocation = 0; + else if (info->shared && ! info->symbolic) + relocation = 0; else { if (! ((*info->callbacks->undefined_symbol) @@ -2696,18 +3958,230 @@ mips_elf_relocate_section (output_bfd, info, input_bfd, input_section, } } - if (r_type != R_MIPS_HI16 - || (rel + 1) >= relend - || ELF32_R_TYPE ((rel + 1)->r_info) != R_MIPS_LO16) - r = _bfd_final_link_relocate (howto, input_bfd, input_section, - contents, rel->r_offset, - relocation, addend); - else + if (r_type == R_MIPS_HI16 + && (rel + 1) < relend + && ELF32_R_TYPE ((rel + 1)->r_info) == R_MIPS_LO16) { mips_elf_relocate_hi16 (input_bfd, rel, rel + 1, contents, relocation + addend); r = bfd_reloc_ok; } + else if (r_type == R_MIPS_GOT16 && local) + { + /* GOT16 must be also with associated LO16 in the local + case. In this case, the addend is extracted and the + section in which the referenced object is determined. + Then the final address of the object is computed and + the GOT entry for the hipage (an aligned 64kb chunk) + is added to .got section if needed. The offset field + of the GOT16-relocated instruction is replaced by the + index of this GOT entry for the hipage. */ + if ((rel + 1) < relend + && ELF32_R_TYPE ((rel + 1)->r_info) == R_MIPS_LO16) + { + mips_elf_relocate_got_local (output_bfd, input_bfd, sgot, + rel, rel + 1, + contents, + relocation + addend); + r = bfd_reloc_ok; + } + else + r = bfd_reloc_outofrange; + } + else if (r_type == R_MIPS_CALL16 + || r_type == R_MIPS_GOT16 + || r_type == R_MIPS_CALL_LO16 + || r_type == R_MIPS_GOT_LO16) + { + bfd_vma offset; + + /* This symbol must be registered as a global symbol + having the corresponding got entry. */ + BFD_ASSERT (h->got_offset != (bfd_vma) -1); + + offset = (h->dynindx - g->global_gotsym + g->local_gotno) * 4; + BFD_ASSERT (g->local_gotno <= offset + && offset < sgot->_raw_size); + bfd_put_32 (output_bfd, relocation + addend, + sgot->contents + offset); + offset = (sgot->output_section->vma + sgot->output_offset + + offset - elf_gp (output_bfd)); + mips_elf_relocate_global_got (input_bfd, rel, contents, + offset); + r = bfd_reloc_ok; + } + else if (r_type == R_MIPS_CALL_HI16 + || r_type == R_MIPS_GOT_HI16) + { + bfd_vma offset; + + /* This must be a global symbol with a got entry. The + next reloc must be the corresponding LO16 reloc. */ + BFD_ASSERT (h != NULL && h->got_offset != (bfd_vma) -1); + BFD_ASSERT ((rel + 1) < relend); + BFD_ASSERT (ELF32_R_TYPE ((rel + 1)->r_info) + == (r_type == R_MIPS_CALL_HI16 + ? R_MIPS_CALL_LO16 + : R_MIPS_GOT_LO16)); + + offset = (h->dynindx - g->global_gotsym + g->local_gotno) * 4; + BFD_ASSERT (g->local_gotno <= offset + && offset < sgot->_raw_size); + bfd_put_32 (output_bfd, relocation + addend, + sgot->contents + offset); + offset = (sgot->output_section->vma + sgot->output_offset + + offset - elf_gp (output_bfd)); + mips_elf_relocate_hi16 (input_bfd, rel, rel + 1, contents, + offset); + r = bfd_reloc_ok; + } + else if (r_type == R_MIPS_REL32 + || r_type == R_MIPS_32) + { + Elf_Internal_Rel outrel; + Elf32_crinfo cptrel; + bfd_byte *cr; + + if (info->shared + && (input_section->flags & SEC_ALLOC) != 0) + { + /* When generating a shared object, these + relocations are copied into the output file to be + resolved at run time. */ + if (sreloc == NULL) + { + sreloc = bfd_get_section_by_name (dynobj, ".rel.dyn"); + BFD_ASSERT (sreloc != NULL); + } + + outrel.r_offset = (rel->r_offset + + input_section->output_section->vma + + input_section->output_offset); + + addend = bfd_get_32 (input_bfd, contents + rel->r_offset); + + if (h != NULL) + { + BFD_ASSERT (h->dynindx != -1); + outrel.r_info = ELF32_R_INFO (h->dynindx, R_MIPS_REL32); + sec = input_section; + } + else + { + long indx; + + sym = local_syms + r_symndx; + + BFD_ASSERT (ELF_ST_TYPE (sym->st_info) == STT_SECTION); + + sec = local_sections[r_symndx]; + if (sec != NULL && bfd_is_abs_section (sec)) + indx = 0; + else if (sec == NULL || sec->owner == NULL) + { + bfd_set_error (bfd_error_bad_value); + return false; + } + else + { + asection *osec; + + osec = sec->output_section; + indx = elf_section_data (osec)->dynindx; + if (indx == 0) + abort (); + } + + outrel.r_info = ELF32_R_INFO (indx, R_MIPS_REL32); + addend += relocation; + } + + bfd_put_32 (output_bfd, addend, contents + rel->r_offset); + bfd_elf32_swap_reloc_out (output_bfd, &outrel, + (((Elf32_External_Rel *) + sreloc->contents) + + sreloc->reloc_count)); + ++sreloc->reloc_count; + + if (SGI_COMPAT (output_bfd)) + { + if (scpt == NULL) + continue; + + /* Make an entry of compact relocation info. */ + mips_elf_set_cr_format (cptrel, CRF_MIPS_LONG); + cptrel.vaddr = (rel->r_offset + + input_section->output_section->vma + + input_section->output_offset); + if (r_type == R_MIPS_REL32) + mips_elf_set_cr_type (cptrel, CRT_MIPS_REL32); + else + mips_elf_set_cr_type (cptrel, CRT_MIPS_WORD); + cptrel.konst = addend; + + cr = (scpt->contents + + sizeof (Elf32_External_compact_rel)); + bfd_elf32_swap_crinfo_out (output_bfd, &cptrel, + ((Elf32_External_crinfo *) cr + + scpt->reloc_count)); + ++scpt->reloc_count; + } + + /* This reloc will be computed at runtime, so + there's no need to do anything now. */ + continue; + } + else + r = _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, + relocation, addend); + } + else + r = _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, + relocation, addend); + + if (SGI_COMPAT (abfd) + && scpt != NULL + && (input_section->flags & SEC_ALLOC) != 0) + { + Elf32_crinfo cptrel; + bfd_byte *cr; + + /* Make an entry of compact relocation info. */ + mips_elf_set_cr_format (cptrel, CRF_MIPS_LONG); + cptrel.vaddr = (rel->r_offset + + input_section->output_section->vma + + input_section->output_offset); + + switch (r_type) + { + case R_MIPS_26: + mips_elf_set_cr_type (cptrel, CRT_MIPS_JMPAD); + cptrel.konst = addend; + cr = scpt->contents + sizeof (Elf32_External_compact_rel); + bfd_elf32_swap_crinfo_out (output_bfd, &cptrel, + ((Elf32_External_crinfo *) cr + + scpt->reloc_count)); + ++scpt->reloc_count; + break; + + case R_MIPS_GPREL16: + case R_MIPS_LITERAL: + case R_MIPS_GPREL32: + mips_elf_set_cr_type (cptrel, CRT_MIPS_GPHI_LO); + cptrel.konst = elf_gp (output_bfd) - cptrel.vaddr; + cr = scpt->contents + sizeof (Elf32_External_compact_rel); + bfd_elf32_swap_crinfo_out (output_bfd, &cptrel, + ((Elf32_External_crinfo *) cr + + scpt->reloc_count)); + ++scpt->reloc_count; + break; + + default: + break; + } + } } if (r != bfd_reloc_ok) @@ -2746,8 +4220,1231 @@ mips_elf_relocate_section (output_bfd, info, input_bfd, input_section, return true; } +/* Functions for the dynamic linker. */ + +/* The name of the dynamic interpreter. This is put in the .interp + section. */ + +#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" + +/* Create dynamic sections when linking against a dynamic object. */ +static boolean mips_elf_create_got_section (bfd *, struct bfd_link_info *); + +static boolean +mips_elf_create_dynamic_sections (abfd, info) + bfd *abfd; + struct bfd_link_info *info; +{ + struct elf_link_hash_entry *h; + flagword flags; + register asection *s; + const char * const *namep; + + flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_READONLY); + + /* Mips ABI requests the .dynamic section to be read only. */ + s = bfd_get_section_by_name (abfd, ".dynamic"); + if (s != NULL) + { + if (! bfd_set_section_flags (abfd, s, flags)) + return false; + } + + /* We need to create .got section. */ + if (! mips_elf_create_got_section (abfd, info)) + return false; + + /* Create .stub section. */ + if (bfd_get_section_by_name (abfd, ".stub") == NULL) + { + s = bfd_make_section (abfd, ".stub"); + if (s == NULL + || ! bfd_set_section_flags (abfd, s, flags) + || ! bfd_set_section_alignment (abfd, s, 2)) + return false; + } + + if (SGI_COMPAT (abfd)) + { + for (namep = mips_elf_dynsym_rtproc_names; *namep != NULL; namep++) + { + h = NULL; + if (! (_bfd_generic_link_add_one_symbol + (info, abfd, *namep, BSF_GLOBAL, bfd_und_section_ptr, + (bfd_vma) 0, (const char *) NULL, false, + get_elf_backend_data (abfd)->collect, + (struct bfd_link_hash_entry **) &h))) + return false; + h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; + h->type = STT_SECTION; + + if (info->shared + && ! bfd_elf32_link_record_dynamic_symbol (info, h)) + return false; + } + + /* Create .compact_rel section. */ + if (bfd_get_section_by_name (abfd, ".compact_rel") == NULL) + { + flags = SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_READONLY; + + s = bfd_make_section (abfd, ".compact_rel"); + if (s == NULL + || ! bfd_set_section_flags (abfd, s, flags) + || ! bfd_set_section_alignment (abfd, s, 2)) + return false; + } + + s->_raw_size = sizeof (Elf32_compact_rel); + + /* Change aligments of some sections. */ + s = bfd_get_section_by_name (abfd, ".hash"); + if (s != NULL) + bfd_set_section_alignment (abfd, s, 4); + s = bfd_get_section_by_name (abfd, ".dynsym"); + if (s != NULL) + bfd_set_section_alignment (abfd, s, 4); + s = bfd_get_section_by_name (abfd, ".dynstr"); + if (s != NULL) + bfd_set_section_alignment (abfd, s, 4); + s = bfd_get_section_by_name (abfd, ".reginfo"); + if (s != NULL) + bfd_set_section_alignment (abfd, s, 4); + s = bfd_get_section_by_name (abfd, ".dynamic"); + if (s != NULL) + bfd_set_section_alignment (abfd, s, 4); + } + + return true; +} + +/* Create the .got section to hold the global offset table. */ + +static boolean +mips_elf_create_got_section (abfd, info) + bfd *abfd; + struct bfd_link_info *info; +{ + flagword flags; + register asection *s; + struct elf_link_hash_entry *h; + struct mips_got_info *g; + + /* This function may be called more than once. */ + if (bfd_get_section_by_name (abfd, ".got") != NULL) + return true; + + flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; + + s = bfd_make_section (abfd, ".got"); + if (s == NULL + || ! bfd_set_section_flags (abfd, s, flags) + || ! bfd_set_section_alignment (abfd, s, 4)) + return false; + + /* Define the symbol _GLOBAL_OFFSET_TABLE_. We don't do this in the + linker script because we don't want to define the symbol if we + are not creating a global offset table. XXX Should this be + defined at the start of the .got section, even if .got section is + accessed by using 16 bit signed offset? */ + h = NULL; + if (! (_bfd_generic_link_add_one_symbol + (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s, + (bfd_vma) 0, (const char *) NULL, false, + get_elf_backend_data (abfd)->collect, + (struct bfd_link_hash_entry **) &h))) + return false; + h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; + h->type = STT_OBJECT; + + if (info->shared + && ! bfd_elf32_link_record_dynamic_symbol (info, h)) + return false; + + /* The first several global offset table entries are reserved. */ + s->_raw_size = MIPS_RESERVED_GOTNO * 4; + + g = (struct mips_got_info *) bfd_alloc (abfd, + sizeof (struct mips_got_info)); + if (g == NULL) + return false; + g->global_gotsym = 0; + g->local_gotno = MIPS_RESERVED_GOTNO; + if (elf_section_data (s) == NULL) + { + s->used_by_bfd = + (PTR) bfd_zalloc (abfd, sizeof (struct bfd_elf_section_data)); + if (elf_section_data (s) == NULL) + return false; + } + elf_section_data (s)->tdata = (PTR) g; + + return true; +} + +/* Look through the relocs for a section during the first phase, and + allocate space in the global offset table. */ + +static boolean +mips_elf_check_relocs (abfd, info, sec, relocs) + bfd *abfd; + struct bfd_link_info *info; + asection *sec; + const Elf_Internal_Rela *relocs; +{ + bfd *dynobj; + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + struct mips_got_info *g; + size_t extsymoff; + const Elf_Internal_Rela *rel; + const Elf_Internal_Rela *rel_end; + asection *sgot; + asection *sreloc; + asection *scpt; + + if (info->relocateable) + return true; + + dynobj = elf_hash_table (info)->dynobj; + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + extsymoff = (elf_bad_symtab (abfd)) ? 0 : symtab_hdr->sh_info; + + sgot = NULL; + sreloc = NULL; + if (SGI_COMPAT (abfd) && dynobj != NULL) + scpt = bfd_get_section_by_name (dynobj, ".compact_rel"); + else + scpt = NULL; + + rel_end = relocs + sec->reloc_count; + for (rel = relocs; rel < rel_end; rel++) + { + unsigned long r_symndx; + struct elf_link_hash_entry *h; + + r_symndx = ELF32_R_SYM (rel->r_info); + + if (r_symndx < extsymoff) + h = NULL; + else + h = sym_hashes[r_symndx - extsymoff]; + + /* Some relocs require a global offset table. */ + if (dynobj == NULL) + { + switch (ELF32_R_TYPE (rel->r_info)) + { + case R_MIPS_GOT16: + case R_MIPS_CALL16: + case R_MIPS_CALL_HI16: + case R_MIPS_CALL_LO16: + case R_MIPS_GOT_HI16: + case R_MIPS_GOT_LO16: + elf_hash_table (info)->dynobj = dynobj = abfd; + if (! mips_elf_create_got_section (dynobj, info)) + return false; + break; + + default: + break; + } + } + + switch (ELF32_R_TYPE (rel->r_info)) + { + case R_MIPS_CALL16: + case R_MIPS_CALL_HI16: + case R_MIPS_CALL_LO16: + /* This symbol requires a global offset table entry. */ + if (sgot == NULL) + { + sgot = bfd_get_section_by_name (dynobj, ".got"); + BFD_ASSERT (sgot != NULL); + BFD_ASSERT (elf_section_data (sgot) != NULL); + g = (struct mips_got_info *) elf_section_data (sgot)->tdata; + BFD_ASSERT (g != NULL); + } + + BFD_ASSERT (h != NULL); + + /* Make sure this symbol is output as a dynamic symbol. */ + if (h->dynindx == -1) + { + if (! bfd_elf32_link_record_dynamic_symbol (info, h)) + return false; + } + + if (h->got_offset != (bfd_vma) -1) + { + /* We have already allocated space in the .got. */ + break; + } + + /* Note the index of the first global got symbol in .dynsym. */ + if (g->global_gotsym == 0 + || g->global_gotsym > (unsigned long) h->dynindx) + g->global_gotsym = h->dynindx; + + /* Make this symbol to have the corresponding got entry. */ + h->got_offset = 0; + + /* We need a stub, not a plt entry for the undefined + function. But we record it as if it needs plt. See + elf_adjust_dynamic_symbol in elflink.h. */ + h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; + h->type = STT_FUNC; + + break; + + case R_MIPS_GOT16: + case R_MIPS_GOT_HI16: + case R_MIPS_GOT_LO16: + /* This symbol requires a global offset table entry. */ + if (sgot == NULL) + { + sgot = bfd_get_section_by_name (dynobj, ".got"); + BFD_ASSERT (sgot != NULL); + BFD_ASSERT (elf_section_data (sgot) != NULL); + g = (struct mips_got_info *) elf_section_data (sgot)->tdata; + BFD_ASSERT (g != NULL); + } + + if (h != NULL) + { + /* Make sure this symbol is output as a dynamic symbol. */ + if (h->dynindx == -1) + { + if (! bfd_elf32_link_record_dynamic_symbol (info, h)) + return false; + } + + if (h->got_offset != (bfd_vma) -1) + { + /* We have already allocated space in the .got. */ + break; + } + /* Note the index of the first global got symbol in + .dynsym. */ + if (g->global_gotsym == 0 + || g->global_gotsym > (unsigned long) h->dynindx) + g->global_gotsym = h->dynindx; + + /* Make this symbol to be the global got symbol. */ + h->got_offset = 0; + } + + break; + + case R_MIPS_32: + case R_MIPS_REL32: + if (info->shared + && (sec->flags & SEC_ALLOC) != 0) + { + /* When creating a shared object, we must copy these + reloc types into the output file as R_MIPS_REL32 + relocs. We create the .rel.dyn reloc section in + dynobj and make room for this reloc. */ + if (sreloc == NULL) + { + const char *name = ".rel.dyn"; + + sreloc = bfd_get_section_by_name (dynobj, name); + if (sreloc == NULL) + { + sreloc = bfd_make_section (dynobj, name); + if (sreloc == NULL + || ! bfd_set_section_flags (dynobj, sreloc, + (SEC_ALLOC + | SEC_LOAD + | SEC_HAS_CONTENTS + | SEC_IN_MEMORY + | SEC_READONLY)) + || ! bfd_set_section_alignment (dynobj, sreloc, 4)) + return false; + + /* Add a null element. */ + sreloc->_raw_size += sizeof (Elf32_External_Rel); + ++sreloc->reloc_count; + } + } + + sreloc->_raw_size += sizeof (Elf32_External_Rel); + + if (scpt != NULL) + scpt->_raw_size += sizeof (Elf32_External_crinfo); + } + + break; + + case R_MIPS_26: + case R_MIPS_GPREL16: + case R_MIPS_LITERAL: + case R_MIPS_GPREL32: + if (scpt != NULL) + scpt->_raw_size += sizeof (Elf32_External_crinfo); + break; + + default: + break; + } + } + + return true; +} + +/* Adjust a symbol defined by a dynamic object and referenced by a + regular object. The current definition is in some section of the + dynamic object, but we're not including those sections. We have to + change the definition to something the rest of the link can + understand. */ + +static boolean +mips_elf_adjust_dynamic_symbol (info, h) + struct bfd_link_info *info; + struct elf_link_hash_entry *h; +{ + bfd *dynobj; + asection *s; + + dynobj = elf_hash_table (info)->dynobj; + + /* Make sure we know what is going on here. */ + BFD_ASSERT (dynobj != NULL + && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) + || h->weakdef != NULL + || ((h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_DYNAMIC) != 0 + && (h->elf_link_hash_flags + & ELF_LINK_HASH_REF_REGULAR) != 0 + && (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0))); + + /* For a function, create a stub, if needed. */ + if (h->type == STT_FUNC + || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) + { + if (! elf_hash_table (info)->dynamic_sections_created) + return true; + + /* If this symbol is not defined in a regular file, then set + the symbol to the stub location. This is required to make + function pointers compare as equal between the normal + executable and the shared library. */ + if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) + { + /* We need .stub section. */ + s = bfd_get_section_by_name (dynobj, ".stub"); + BFD_ASSERT (s != NULL); + + h->root.u.def.section = s; + h->root.u.def.value = s->_raw_size; + + /* XXX Write this stub address somewhere. */ + h->plt_offset = s->_raw_size; + + /* Make room for this stub code. */ + s->_raw_size += MIPS_FUNCTION_STUB_SIZE; + + /* The last half word of the stub will be filled with the index + of this symbol in .dynsym section. */ + return true; + } + } + + /* If this is a weak symbol, and there is a real definition, the + processor independent code will have arranged for us to see the + real definition first, and we can just use the same value. */ + if (h->weakdef != NULL) + { + 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; + return true; + } + + /* This is a reference to a symbol defined by a dynamic object which + is not a function. */ + + return true; +} + +/* Set the sizes of the dynamic sections. */ + +static boolean +mips_elf_size_dynamic_sections (output_bfd, info) + bfd *output_bfd; + struct bfd_link_info *info; +{ + bfd *dynobj; + asection *s; + boolean reltext; + asection *sgot; + struct mips_got_info *g; + + dynobj = elf_hash_table (info)->dynobj; + BFD_ASSERT (dynobj != NULL); + + if (elf_hash_table (info)->dynamic_sections_created) + { + /* Set the contents of the .interp section to the interpreter. */ + if (! info->shared) + { + s = bfd_get_section_by_name (dynobj, ".interp"); + BFD_ASSERT (s != NULL); + s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; + s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; + } + } + + /* Recompute the size of .got for local entires (reserved and + hipages) if needed. To estimate it, get the upper bound of total + size of loadable sections. */ + sgot = bfd_get_section_by_name (dynobj, ".got"); + + if (sgot != NULL) + { + bfd_size_type loadable_size = 0; + bfd_size_type local_gotno; + struct _bfd *sub; + + BFD_ASSERT (elf_section_data (sgot) != NULL); + g = (struct mips_got_info *) elf_section_data (sgot)->tdata; + BFD_ASSERT (g != NULL); + + for (sub = info->input_bfds; sub; sub = sub->link_next) + for (s = sub->sections; s != NULL; s = s->next) + { + if ((s->flags & SEC_ALLOC) == 0) + continue; + loadable_size += (s->_raw_size + 0xf) & ~0xf; + } + + loadable_size += MIPS_FUNCTION_STUB_SIZE; + + /* Assume there are two loadable segments consisting of + contiguous sections. Is 5 enough? */ + local_gotno = (loadable_size >> 16) + 5 + MIPS_RESERVED_GOTNO; + g->local_gotno = local_gotno; + sgot->_raw_size += local_gotno * 4; + } + + /* The check_relocs and adjust_dynamic_symbol entry points have + determined the sizes of the various dynamic sections. Allocate + memory for them. */ + reltext = false; + for (s = dynobj->sections; s != NULL; s = s->next) + { + const char *name; + boolean strip; + + /* It's OK to base decisions on the section name, because none + of the dynobj section names depend upon the input files. */ + name = bfd_get_section_name (dynobj, s); + + if ((s->flags & SEC_IN_MEMORY) == 0) + continue; + + strip = false; + + if (strncmp (name, ".rel", 4) == 0) + { + if (s->_raw_size == 0) + strip = true; + else + { + asection *target; + + /* If this relocation section applies to a read only + section, then we probably need a DT_TEXTREL entry. + If the relocation section is .rel.dyn, we always + assert a DT_TEXTREL entry rather than testing whether + there exists a relocation to a read only section or + not. */ + target = bfd_get_section_by_name (output_bfd, name + 4); + if ((target != NULL && (target->flags & SEC_READONLY) != 0) + || strcmp (name, ".rel.dyn") == 0) + reltext = true; + + /* We use the reloc_count field as a counter if we need + to copy relocs into the output file. */ + if (strcmp (name, ".rel.dyn") != 0) + s->reloc_count = 0; + } + } + else if (strncmp (name, ".got", 4) == 0) + { + int i; + + BFD_ASSERT (elf_section_data (s) != NULL); + g = (struct mips_got_info *) elf_section_data (s)->tdata; + BFD_ASSERT (g != NULL); + + /* Fix the size of .got section for the correspondence of + global symbols and got entries. This adds some useless + got entries. Is this required by ABI really? */ + i = elf_hash_table (info)->dynsymcount - g->global_gotsym; + s->_raw_size += i * 4; + } + else if (strncmp (name, ".stub", 5) == 0) + { + /* Irix rld assumes that the function stub isn't at the end + of .text section. So put a dummy. XXX */ + s->_raw_size += MIPS_FUNCTION_STUB_SIZE; + } + else if (strncmp (name, ".init", 5) != 0 + && (! SGI_COMPAT (output_bfd) + || strncmp (name, ".compact_rel", 12) != 0)) + { + /* It's not one of our sections, so don't allocate space. */ + continue; + } + + if (strip) + { + asection **spp; + + for (spp = &s->output_section->owner->sections; + *spp != s->output_section; + spp = &(*spp)->next) + ; + *spp = s->output_section->next; + --s->output_section->owner->section_count; + + continue; + } + + /* Allocate memory for the section contents. */ + s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size); + if (s->contents == NULL && s->_raw_size != 0) + { + bfd_set_error (bfd_error_no_memory); + return false; + } + memset (s->contents, 0, s->_raw_size); + } + + if (elf_hash_table (info)->dynamic_sections_created) + { + /* Add some entries to the .dynamic section. We fill in the + values later, in elf_mips_finish_dynamic_sections, but we + must add the entries now so that we get the correct size for + the .dynamic section. The DT_DEBUG entry is filled in by the + dynamic linker and used by the debugger. */ + if (! info->shared) + { + if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0)) + return false; + } + + if (reltext) + { + if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0)) + return false; + } + + if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)) + return false; + + if (bfd_get_section_by_name (dynobj, ".rel.dyn")) + { + if (! bfd_elf32_add_dynamic_entry (info, DT_REL, 0)) + return false; + + if (! bfd_elf32_add_dynamic_entry (info, DT_RELSZ, 0)) + return false; + + if (! bfd_elf32_add_dynamic_entry (info, DT_RELENT, 0)) + return false; + } + + if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_CONFLICTNO, 0)) + return false; + + if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_LIBLISTNO, 0)) + return false; + + if (bfd_get_section_by_name (dynobj, ".conflict")) + { + if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_CONFLICT, 0)) + return false; + + s = bfd_get_section_by_name (dynobj, ".liblist"); + BFD_ASSERT (s != NULL); + + if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_LIBLIST, 0)) + return false; + } + + if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_RLD_VERSION, 0)) + return false; + + if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_FLAGS, 0)) + return false; + + if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_TIME_STAMP, 0)) + return false; + +#if 0 /* FIXME */ + if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_ICHECKSUM, 0)) + return false; +#endif + +#if 0 /* FIXME */ + if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_IVERSION, 0)) + return false; +#endif + + if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_BASE_ADDRESS, 0)) + return false; + + if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_LOCAL_GOTNO, 0)) + return false; + + if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_SYMTABNO, 0)) + return false; + + if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_UNREFEXTNO, 0)) + return false; + + if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_GOTSYM, 0)) + return false; + + if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_HIPAGENO, 0)) + return false; + +#if 0 /* (SGI_COMPAT) */ + if (! bfd_get_section_by_name (dynobj, ".init")) + if (! bfd_elf32_add_dynamic_entry (info, DT_INIT, 0)) + return false; + + if (! bfd_get_section_by_name (dynobj, ".fini")) + if (! bfd_elf32_add_dynamic_entry (info, DT_FINI, 0)) + return false; +#endif + } + + /* If we are generating a shared library, we generate a section + symbol for each output section. These are local symbols, which + means that they must come first in the dynamic symbol table. + That means we must increment the dynamic symbol index of every + other dynamic symbol. */ + if (info->shared) + { + const char * const *namep; + int c, i; + bfd_size_type strindex; + struct bfd_strtab_hash *dynstr; + struct mips_got_info *g; + + if (SGI_COMPAT (output_bfd)) + { + c = SIZEOF_MIPS_DYNSYM_SECNAMES - 1; + elf_link_hash_traverse (elf_hash_table (info), + mips_elf_adjust_dynindx, + (PTR) &c); + elf_hash_table (info)->dynsymcount += c; + + dynstr = elf_hash_table (info)->dynstr; + BFD_ASSERT (dynstr != NULL); + + for (i = 1, namep = mips_elf_dynsym_sec_names; + *namep != NULL; + i++, namep++) + { + s = bfd_get_section_by_name (output_bfd, *namep); + if (s != NULL) + elf_section_data (s)->dynindx = i; + + strindex = _bfd_stringtab_add (dynstr, *namep, true, false); + if (strindex == (bfd_size_type) -1) + return false; + + mips_elf_hash_table (info)->dynsym_sec_strindex[i] = strindex; + } + } + else + { + c = bfd_count_sections (output_bfd); + elf_link_hash_traverse (elf_hash_table (info), + mips_elf_adjust_dynindx, + (PTR) &c); + elf_hash_table (info)->dynsymcount += c; + + for (i = 1, s = output_bfd->sections; s != NULL; s = s->next, i++) + { + elf_section_data (s)->dynindx = i; + /* These symbols will have no names, so we don't need to + fiddle with dynstr_index. */ + } + } + + s = bfd_get_section_by_name (dynobj, ".got"); + BFD_ASSERT (s != NULL); + BFD_ASSERT (elf_section_data (s) != NULL); + g = (struct mips_got_info *) elf_section_data (s)->tdata; + BFD_ASSERT (g != NULL); + + /* If there are no global got symbols, fake the last symbol so for + safety. */ + if (g->global_gotsym) + g->global_gotsym += c; + else + g->global_gotsym = elf_hash_table (info)->dynsymcount - 1; + } + + return true; +} + +/* Increment the index of a dynamic symbol by a given amount. Called + via elf_link_hash_traverse. */ + +static boolean +mips_elf_adjust_dynindx (h, cparg) + struct elf_link_hash_entry *h; + PTR cparg; +{ + int *cp = (int *) cparg; + + if (h->dynindx != -1) + h->dynindx += *cp; + return true; +} + +/* Finish up dynamic symbol handling. We set the contents of various + dynamic sections here. */ + +static boolean +mips_elf_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; +{ + bfd *dynobj; + bfd_vma gval; + asection *sgot; + struct mips_got_info *g; + const char *name; + + dynobj = elf_hash_table (info)->dynobj; + gval = sym->st_value; + + if (h->plt_offset != (bfd_vma) -1) + { + asection *s; + bfd_byte *p; + bfd_byte stub[MIPS_FUNCTION_STUB_SIZE]; + + /* This symbol has a stub. Set it up. */ + + BFD_ASSERT (h->dynindx != -1); + + s = bfd_get_section_by_name (dynobj, ".stub"); + BFD_ASSERT (s != NULL); + + /* Fill the stub. */ + p = stub; + bfd_put_32 (output_bfd, STUB_LW(output_bfd), p); + p += 4; + bfd_put_32 (output_bfd, STUB_MOVE, p); + p += 4; + + /* FIXME: Can h->dynindex be more than 64K? */ + if (h->dynindx & 0xffff0000) + return false; + + bfd_put_32 (output_bfd, STUB_JALR, p); + p += 4; + bfd_put_32 (output_bfd, STUB_LI16 + h->dynindx, p); + + BFD_ASSERT (h->plt_offset <= s->_raw_size); + memcpy (s->contents + h->plt_offset, stub, MIPS_FUNCTION_STUB_SIZE); + + /* Mark the symbol as undefined. plt_offset != -1 occurs + only for the referenced symbol. */ + sym->st_shndx = SHN_UNDEF; + + /* The run-time linker uses the st_value field of the symbol + to reset the global offset table entry for this external + to its stub address when unlinking a shared object. */ + gval = s->output_section->vma + s->output_offset + h->plt_offset; + sym->st_value = gval; + } + + BFD_ASSERT (h->dynindx != -1); + + sgot = bfd_get_section_by_name (dynobj, ".got"); + BFD_ASSERT (sgot != NULL); + BFD_ASSERT (elf_section_data (sgot) != NULL); + g = (struct mips_got_info *) elf_section_data (sgot)->tdata; + BFD_ASSERT (g != NULL); + + if ((unsigned long) h->dynindx >= g->global_gotsym) + { + bfd_size_type offset; + + /* This symbol has an entry in the global offset table. Set its + value to the corresponding got entry, if needed. */ + if (h->got_offset == (bfd_vma) -1) + { + offset = (h->dynindx - g->global_gotsym + g->local_gotno) * 4; + BFD_ASSERT (g->local_gotno * 4 <= offset + && offset < sgot->_raw_size); + bfd_put_32 (output_bfd, gval, sgot->contents + offset); + } + } + + /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ + name = h->root.root.string; + if (strcmp (name, "_DYNAMIC") == 0 + || strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0) + sym->st_shndx = SHN_ABS; + + if (SGI_COMPAT (output_bfd)) + { + if (strcmp (name, "_gp_disp") == 0) + { + sym->st_shndx = SHN_ABS; + sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); + sym->st_value = elf_gp (output_bfd); + } + else if (strcmp (name, mips_elf_dynsym_rtproc_names[0]) == 0 + || strcmp (name, mips_elf_dynsym_rtproc_names[1]) == 0) + { + sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); + sym->st_other = STO_PROTECTED; + sym->st_value = 0; + sym->st_shndx = SHN_MIPS_DATA; + } + else if (strcmp (name, mips_elf_dynsym_rtproc_names[2]) == 0) + { + sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); + sym->st_other = STO_PROTECTED; + sym->st_value = mips_elf_hash_table (info)->procedure_count; + sym->st_shndx = SHN_ABS; + } + + if (sym->st_shndx != SHN_UNDEF) + { + if (h->type == STT_FUNC) + sym->st_shndx = SHN_MIPS_TEXT; + else if (h->type == STT_OBJECT) + sym->st_shndx = SHN_MIPS_DATA; + } + } + + return true; +} + +/* Finish up the dynamic sections. */ + +static boolean +mips_elf_finish_dynamic_sections (output_bfd, info) + bfd *output_bfd; + struct bfd_link_info *info; +{ + bfd *dynobj; + asection *sdyn; + asection *sgot; + struct mips_got_info *g; + + dynobj = elf_hash_table (info)->dynobj; + + sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); + + sgot = bfd_get_section_by_name (dynobj, ".got"); + BFD_ASSERT (sgot != NULL); + + BFD_ASSERT (elf_section_data (sgot) != NULL); + g = (struct mips_got_info *) elf_section_data (sgot)->tdata; + BFD_ASSERT (g != NULL); + + if (elf_hash_table (info)->dynamic_sections_created) + { + Elf32_External_Dyn *dyncon, *dynconend; + + BFD_ASSERT (sdyn != NULL); + + dyncon = (Elf32_External_Dyn *) sdyn->contents; + dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); + for (; dyncon < dynconend; dyncon++) + { + Elf_Internal_Dyn dyn; + const char *name; + size_t elemsize; + asection *s; + + bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); + + switch (dyn.d_tag) + { + default: + break; + + case DT_RELENT: + s = bfd_get_section_by_name (dynobj, ".rel.dyn"); + BFD_ASSERT (s != NULL); + dyn.d_un.d_val = sizeof (Elf32_External_Rel); + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_STRSZ: + /* Rewrite DT_STRSZ. */ + dyn.d_un.d_val = + _bfd_stringtab_size (elf_hash_table (info)->dynstr); + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_PLTGOT: + name = ".got"; + goto get_vma; + case DT_MIPS_CONFLICT: + name = ".conflict"; + goto get_vma; + case DT_MIPS_LIBLIST: + name = ".liblist"; + get_vma: + s = bfd_get_section_by_name (output_bfd, name); + BFD_ASSERT (s != NULL); + dyn.d_un.d_ptr = s->vma; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_MIPS_RLD_VERSION: + dyn.d_un.d_val = 1; /* XXX */ + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_MIPS_FLAGS: + dyn.d_un.d_val = RHF_NOTPOT; /* XXX */ + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_MIPS_CONFLICTNO: + name = ".conflict"; + elemsize = sizeof (Elf32_Conflict); + goto set_elemno; + + case DT_MIPS_LIBLISTNO: + name = ".liblist"; + elemsize = sizeof (Elf32_Lib); + set_elemno: + s = bfd_get_section_by_name (output_bfd, name); + if (s != NULL) + { + if (s->_cooked_size != 0) + dyn.d_un.d_val = s->_cooked_size / elemsize; + else + dyn.d_un.d_val = s->_raw_size / elemsize; + } + else + dyn.d_un.d_val = 0; + + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_MIPS_TIME_STAMP: + time ((time_t *) &dyn.d_un.d_val); + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_MIPS_ICHECKSUM: + /* XXX FIXME: */ + break; + + case DT_MIPS_IVERSION: + /* XXX FIXME: */ + break; + + case DT_MIPS_BASE_ADDRESS: + s = output_bfd->sections; + BFD_ASSERT (s != NULL); + dyn.d_un.d_ptr = s->vma & ~(0xffff); + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_MIPS_LOCAL_GOTNO: + dyn.d_un.d_val = g->local_gotno; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_MIPS_SYMTABNO: + name = ".dynsym"; + elemsize = sizeof (Elf32_External_Sym); + s = bfd_get_section_by_name (output_bfd, name); + BFD_ASSERT (s != NULL); + + if (s->_cooked_size != 0) + dyn.d_un.d_val = s->_cooked_size / elemsize; + else + dyn.d_un.d_val = s->_raw_size / elemsize; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_MIPS_UNREFEXTNO: + /* XXX FIXME: */ + dyn.d_un.d_val = SIZEOF_MIPS_DYNSYM_SECNAMES; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_MIPS_GOTSYM: + dyn.d_un.d_val = g->global_gotsym; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_MIPS_HIPAGENO: + dyn.d_un.d_val = g->local_gotno - MIPS_RESERVED_GOTNO; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + } + } + } + + /* The first entry of the global offset table will be filled at + runtime. The second entry will be used by some runtime loaders. + This isn't the case of Irix rld. */ + if (sgot->_raw_size > 0) + { + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); + bfd_put_32 (output_bfd, (bfd_vma) 0x80000000, sgot->contents + 4); + } + + elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; + + if (info->shared) + { + asection *sdynsym; + asection *s; + unsigned int i; + bfd_vma last; + Elf_Internal_Sym sym; + long dindx; + const char *name; + const char * const * namep = mips_elf_dynsym_sec_names; + Elf32_compact_rel cpt; + + /* Set up the section symbols for the output sections. SGI set + STT_NOTYPE attribute for these symbols. Should we do so? */ + + sdynsym = bfd_get_section_by_name (dynobj, ".dynsym"); + BFD_ASSERT (sdynsym != NULL); + + if (SGI_COMPAT (output_bfd)) + { + sym.st_size = 0; + sym.st_name = 0; + sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE); + sym.st_other = 0; + + i = 0; + while ((name = *namep++) != NULL) + { + s = bfd_get_section_by_name (output_bfd, name); + if (s) + { + sym.st_value = s->vma; + dindx = elf_section_data (s)->dynindx; + last = s->vma + s->_raw_size; + } + else + { + sym.st_value = last; + dindx++; + } + + sym.st_shndx = (i < MIPS_TEXT_DYNSYM_SECNO + ? SHN_MIPS_TEXT + : SHN_MIPS_DATA); + ++i; + sym.st_name = + mips_elf_hash_table (info)->dynsym_sec_strindex[dindx]; + + bfd_elf32_swap_symbol_out (output_bfd, &sym, + (((Elf32_External_Sym *) + sdynsym->contents) + + dindx)); + } + + /* Set the sh_info field of the output .dynsym section to + the index of the first global symbol. */ + elf_section_data (sdynsym->output_section)->this_hdr.sh_info = + SIZEOF_MIPS_DYNSYM_SECNAMES; + } + else + { + sym.st_size = 0; + sym.st_name = 0; + sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); + sym.st_other = 0; + + for (s = output_bfd->sections; s != NULL; s = s->next) + { + int indx; + + sym.st_value = s->vma; + + indx = elf_section_data (s)->this_idx; + BFD_ASSERT (indx > 0); + sym.st_shndx = indx; + + bfd_elf32_swap_symbol_out (output_bfd, &sym, + (((Elf32_External_Sym *) + sdynsym->contents) + + elf_section_data (s)->dynindx)); + } + + /* Set the sh_info field of the output .dynsym section to + the index of the first global symbol. */ + elf_section_data (sdynsym->output_section)->this_hdr.sh_info = + bfd_count_sections (output_bfd) + 1; + } + + if (SGI_COMPAT (output_bfd)) + { + /* Write .compact_rel section out. */ + s = bfd_get_section_by_name (dynobj, ".compact_rel"); + BFD_ASSERT (s != NULL); + + cpt.id1 = 1; + cpt.num = s->reloc_count; + cpt.id2 = 2; + cpt.offset = (s->output_section->filepos + + sizeof (Elf32_External_compact_rel)); + cpt.reserved0 = 0; + cpt.reserved1 = 0; + bfd_elf32_swap_compact_rel_out (output_bfd, &cpt, + ((Elf32_External_compact_rel *) + s->contents)); + + /* Clean up a dummy stub function entry in .text. */ + s = bfd_get_section_by_name (dynobj, ".stub"); + if (s != NULL) + { + file_ptr dummy_offset; + + BFD_ASSERT (s->_raw_size >= MIPS_FUNCTION_STUB_SIZE); + dummy_offset = s->_raw_size - MIPS_FUNCTION_STUB_SIZE; + memset (s->contents + dummy_offset, 0, MIPS_FUNCTION_STUB_SIZE); + } + } + + /* Clean up a first relocation in .rel.dyn. */ + s = bfd_get_section_by_name (dynobj, ".rel.dyn"); + if (s) + memset (s->contents, 0, sizeof (Elf32_External_Rel)); + } + + return true; +} + /* This is almost identical to bfd_generic_get_... except that some MIPS relocations need to be handled specially. Sigh. */ + static bfd_byte * elf32_mips_get_relocated_section_contents (abfd, link_info, link_order, data, relocateable, symbols) @@ -2769,12 +5466,9 @@ elf32_mips_get_relocated_section_contents (abfd, link_info, link_order, data, if (reloc_size < 0) goto error_return; - reloc_vector = (arelent **) malloc (reloc_size); + reloc_vector = (arelent **) bfd_malloc (reloc_size); if (reloc_vector == NULL && reloc_size != 0) - { - bfd_set_error (bfd_error_no_memory); - goto error_return; - } + goto error_return; /* read in the section */ if (!bfd_get_section_contents (input_bfd, @@ -2861,7 +5555,8 @@ elf32_mips_get_relocated_section_contents (abfd, link_info, link_order, data, /* The gp isn't there; let the special function code fall over on its own. */ } - else if ((*parent)->howto->special_function == mips_elf_gprel16_reloc) + else if ((*parent)->howto->special_function + == mips_elf_gprel16_reloc) { /* bypass special_function call */ r = gprel16_with_gp (input_bfd, sym, *parent, input_section, @@ -2929,7 +5624,8 @@ error_return: free (reloc_vector); return NULL; } -#define bfd_elf32_bfd_get_relocated_section_contents elf32_mips_get_relocated_section_contents +#define bfd_elf32_bfd_get_relocated_section_contents \ + elf32_mips_get_relocated_section_contents /* ECOFF swapping routines. These are used when dealing with the .mdebug section, which is in the ECOFF debugging format. */ @@ -2982,6 +5678,7 @@ static const struct ecoff_debug_swap mips_elf_ecoff_debug_swap = #define ELF_MACHINE_CODE EM_MIPS #define ELF_MAXPAGESIZE 0x10000 #define elf_backend_collect true +#define elf_backend_type_change_ok true #define elf_info_to_howto 0 #define elf_info_to_howto_rel mips_info_to_howto_rel #define elf_backend_sym_is_global mips_elf_sym_is_global @@ -2992,6 +5689,9 @@ static const struct ecoff_debug_swap mips_elf_ecoff_debug_swap = mips_elf_section_from_bfd_section #define elf_backend_section_processing mips_elf_section_processing #define elf_backend_symbol_processing mips_elf_symbol_processing +#define elf_backend_additional_program_headers \ + mips_elf_additional_program_headers +#define elf_backend_modify_segment_map mips_elf_modify_segment_map #define elf_backend_final_write_processing \ mips_elf_final_write_processing #define elf_backend_ecoff_debug_swap &mips_elf_ecoff_debug_swap @@ -3002,7 +5702,25 @@ static const struct ecoff_debug_swap mips_elf_ecoff_debug_swap = #define bfd_elf32_bfd_link_hash_table_create \ mips_elf_link_hash_table_create #define bfd_elf32_bfd_final_link mips_elf_final_link +#define bfd_elf32_bfd_copy_private_bfd_data \ + mips_elf_copy_private_bfd_data +#define bfd_elf32_bfd_merge_private_bfd_data \ + mips_elf_merge_private_bfd_data +#define bfd_elf32_bfd_set_private_flags mips_elf_set_private_flags #define elf_backend_relocate_section mips_elf_relocate_section #define elf_backend_add_symbol_hook mips_elf_add_symbol_hook +#define elf_backend_create_dynamic_sections \ + mips_elf_create_dynamic_sections +#define elf_backend_check_relocs mips_elf_check_relocs +#define elf_backend_adjust_dynamic_symbol \ + mips_elf_adjust_dynamic_symbol +#define elf_backend_size_dynamic_sections \ + mips_elf_size_dynamic_sections +#define elf_backend_relocate_section mips_elf_relocate_section +#define elf_backend_finish_dynamic_symbol \ + mips_elf_finish_dynamic_symbol +#define elf_backend_finish_dynamic_sections \ + mips_elf_finish_dynamic_sections +#define elf_backend_want_hdr_in_seg 1 #include "elf32-target.h" diff --git a/bfd/elflink.h b/bfd/elflink.h index 1107c04..fde4006 100644 --- a/bfd/elflink.h +++ b/bfd/elflink.h @@ -629,7 +629,7 @@ elf_link_add_object_symbols (abfd, info) definition = true; size_change_ok = false; - type_change_ok = false; + type_change_ok = get_elf_backend_data (abfd)->type_change_ok; if (info->hash->creator->flavour == bfd_target_elf_flavour) { /* We need to look up the symbol now in order to get some of @@ -648,15 +648,16 @@ elf_link_add_object_symbols (abfd, info) /* It's OK to change the type if it used to be a weak definition. */ - type_change_ok = (h->root.type == bfd_link_hash_defweak - || h->root.type == bfd_link_hash_undefweak); + if (h->root.type == bfd_link_hash_defweak + || h->root.type == bfd_link_hash_undefweak) + type_change_ok = true; /* It's OK to change the size if it used to be a weak definition, or if it used to be undefined, or if we will - be overriding an old definition. - */ - size_change_ok = (type_change_ok - || h->root.type == bfd_link_hash_undefined); + be overriding an old definition. */ + if (type_change_ok + || h->root.type == bfd_link_hash_undefined) + size_change_ok = true; /* If we are looking at a dynamic object, and this is a definition, we need to see if it has already been defined @@ -2401,12 +2402,15 @@ elf_link_output_extsym (h, data) linker will complain that the symbol is undefined when the program is run. We don't have to worry about symbols that are referenced by regular files, because we will already have issued - warnings for them. */ + warnings for them. FIXME: _rld_new_interface is apparently + supposed to be undefined on Irix 5.3. This should be handled in + a better way. */ if (! finfo->info->relocateable && ! finfo->info->shared && h->root.type == bfd_link_hash_undefined && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0 - && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) + && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0 + && strcmp (h->root.root.string, "_rld_new_interface") != 0) { if (! ((*finfo->info->callbacks->undefined_symbol) (finfo->info, h->root.root.string, h->root.u.undef.abfd, @@ -2987,6 +2991,7 @@ elf_reloc_link_order (output_bfd, info, output_section, link_order) reloc_howto_type *howto; long indx; bfd_vma offset; + bfd_vma addend; struct elf_link_hash_entry **rel_hash_ptr; Elf_Internal_Shdr *rel_hdr; @@ -2997,10 +3002,61 @@ elf_reloc_link_order (output_bfd, info, output_section, link_order) return false; } + addend = link_order->u.reloc.p->addend; + + /* Figure out the symbol index. */ + rel_hash_ptr = (elf_section_data (output_section)->rel_hashes + + output_section->reloc_count); + if (link_order->type == bfd_section_reloc_link_order) + { + indx = link_order->u.reloc.p->u.section->target_index; + BFD_ASSERT (indx != 0); + *rel_hash_ptr = NULL; + } + else + { + struct elf_link_hash_entry *h; + + /* Treat a reloc against a defined symbol as though it were + actually against the section. */ + h = elf_link_hash_lookup (elf_hash_table (info), + link_order->u.reloc.p->u.name, + false, false, true); + if (h != NULL + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak)) + { + asection *section; + + section = h->root.u.def.section; + indx = section->output_section->target_index; + *rel_hash_ptr = NULL; + /* It seems that we ought to add the symbol value to the + addend here, but in practice it has already been added + because it was passed to constructor_callback. */ + addend += section->output_section->vma + section->output_offset; + } + else if (h != NULL) + { + /* Setting the index to -2 tells elf_link_output_extsym that + this symbol is used by a reloc. */ + h->indx = -2; + *rel_hash_ptr = h; + indx = 0; + } + else + { + if (! ((*info->callbacks->unattached_reloc) + (info, link_order->u.reloc.p->u.name, (bfd *) NULL, + (asection *) NULL, (bfd_vma) 0))) + return false; + indx = 0; + } + } + /* If this is an inplace reloc, we must write the addend into the object file. */ - if (howto->partial_inplace - && link_order->u.reloc.p->addend != 0) + if (howto->partial_inplace && addend != 0) { bfd_size_type size; bfd_reloc_status_type rstat; @@ -3011,8 +3067,7 @@ elf_reloc_link_order (output_bfd, info, output_section, link_order) buf = (bfd_byte *) bfd_zmalloc (size); if (buf == (bfd_byte *) NULL) return false; - rstat = _bfd_relocate_contents (howto, output_bfd, - link_order->u.reloc.p->addend, buf); + rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); switch (rstat) { case bfd_reloc_ok: @@ -3027,8 +3082,8 @@ elf_reloc_link_order (output_bfd, info, output_section, link_order) ? bfd_section_name (output_bfd, link_order->u.reloc.p->u.section) : link_order->u.reloc.p->u.name), - howto->name, link_order->u.reloc.p->addend, - (bfd *) NULL, (asection *) NULL, (bfd_vma) 0))) + howto->name, addend, (bfd *) NULL, (asection *) NULL, + (bfd_vma) 0))) { free (buf); return false; @@ -3042,40 +3097,6 @@ elf_reloc_link_order (output_bfd, info, output_section, link_order) return false; } - /* Figure out the symbol index. */ - rel_hash_ptr = (elf_section_data (output_section)->rel_hashes - + output_section->reloc_count); - if (link_order->type == bfd_section_reloc_link_order) - { - indx = link_order->u.reloc.p->u.section->target_index; - BFD_ASSERT (indx != 0); - *rel_hash_ptr = NULL; - } - else - { - struct elf_link_hash_entry *h; - - h = elf_link_hash_lookup (elf_hash_table (info), - link_order->u.reloc.p->u.name, - false, false, true); - if (h != NULL) - { - /* Setting the index to -2 tells elf_link_output_extsym that - this symbol is used by a reloc. */ - h->indx = -2; - *rel_hash_ptr = h; - indx = 0; - } - else - { - if (! ((*info->callbacks->unattached_reloc) - (info, link_order->u.reloc.p->u.name, (bfd *) NULL, - (asection *) NULL, (bfd_vma) 0))) - return false; - indx = 0; - } - } - /* The address of a reloc is relative to the section in a relocateable file, and is a virtual address in an executable file. */ @@ -3103,7 +3124,7 @@ elf_reloc_link_order (output_bfd, info, output_section, link_order) irela.r_offset = offset; irela.r_info = ELF_R_INFO (indx, howto->type); - irela.r_addend = link_order->u.reloc.p->addend; + irela.r_addend = addend; erela = ((Elf_External_Rela *) rel_hdr->contents + output_section->reloc_count); elf_swap_reloca_out (output_bfd, &irela, erela); diff --git a/bfd/elfxx-target.h b/bfd/elfxx-target.h index e719d0d..989a1dc 100644 --- a/bfd/elfxx-target.h +++ b/bfd/elfxx-target.h @@ -156,6 +156,9 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef elf_backend_collect #define elf_backend_collect false #endif +#ifndef elf_backend_type_change_ok +#define elf_backend_type_change_ok false +#endif #ifndef elf_backend_sym_is_global #define elf_backend_sym_is_global 0 @@ -214,8 +217,11 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef elf_backend_final_write_processing #define elf_backend_final_write_processing 0 #endif -#ifndef elf_backend_create_program_headers -#define elf_backend_create_program_headers 0 +#ifndef elf_backend_additional_program_headers +#define elf_backend_additional_program_headers 0 +#endif +#ifndef elf_backend_modify_segment_map +#define elf_backend_modify_segment_map 0 #endif #ifndef elf_backend_ecoff_debug_swap #define elf_backend_ecoff_debug_swap 0 @@ -242,6 +248,7 @@ static CONST struct elf_backend_data elfNN_bed = ELF_MACHINE_CODE, /* elf_machine_code */ ELF_MAXPAGESIZE, /* maxpagesize */ elf_backend_collect, + elf_backend_type_change_ok, elf_info_to_howto, elf_info_to_howto_rel, elf_backend_sym_is_global, @@ -263,7 +270,8 @@ static CONST struct elf_backend_data elfNN_bed = elf_backend_finish_dynamic_sections, elf_backend_begin_write_processing, elf_backend_final_write_processing, - elf_backend_create_program_headers, + elf_backend_additional_program_headers, + elf_backend_modify_segment_map, elf_backend_ecoff_debug_swap, ELF_MACHINE_ALT1, ELF_MACHINE_ALT2, @@ -283,11 +291,11 @@ const bfd_target TARGET_BIG_SYM = /* flavour: general indication about file */ bfd_target_elf_flavour, - /* byteorder_big_p: data is big endian */ - true, + /* byteorder: data is big endian */ + BFD_ENDIAN_BIG, - /* header_byteorder_big_p: header is also big endian */ - true, + /* header_byteorder: header is also big endian */ + BFD_ENDIAN_BIG, /* object_flags: mask of all file flags */ (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS | @@ -367,11 +375,11 @@ const bfd_target TARGET_LITTLE_SYM = /* flavour: general indication about file */ bfd_target_elf_flavour, - /* byteorder_big_p: data is big endian */ - false, /* Nope -- this one's little endian */ + /* byteorder: data is little endian */ + BFD_ENDIAN_LITTLE, - /* header_byteorder_big_p: header is also big endian */ - false, /* Nope -- this one's little endian */ + /* header_byteorder: header is also little endian */ + BFD_ENDIAN_LITTLE, /* object_flags: mask of all file flags */ (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS | |