diff options
Diffstat (limited to 'bfd/elf32-cris.c')
| -rw-r--r-- | bfd/elf32-cris.c | 1247 |
1 files changed, 1054 insertions, 193 deletions
diff --git a/bfd/elf32-cris.c b/bfd/elf32-cris.c index 360cba6..c297689 100644 --- a/bfd/elf32-cris.c +++ b/bfd/elf32-cris.c @@ -1,5 +1,5 @@ /* CRIS-specific support for 32-bit ELF. - Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 + Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. Contributed by Axis Communications AB. Written by Hans-Peter Nilsson, based on elf32-fr30.c @@ -27,6 +27,7 @@ #include "libbfd.h" #include "elf-bfd.h" #include "elf/cris.h" +#include <limits.h> /* Forward declarations. */ static reloc_howto_type * cris_reloc_type_lookup @@ -419,21 +420,24 @@ static reloc_howto_type cris_elf_howto_table [] = #define TLSHOWTO32(name) \ HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \ bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE) -#define TLSHOWTO16(name) \ - HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, \ +#define TLSHOWTO16X(name, X) \ + HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \ bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE) +#define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned) +#define TLSHOWTO16S(name) TLSHOWTO16X(name, signed) TLSHOWTO32 (R_CRIS_32_GOT_GD), TLSHOWTO16 (R_CRIS_16_GOT_GD), TLSHOWTO32 (R_CRIS_32_GD), TLSHOWTO32 (R_CRIS_DTP), TLSHOWTO32 (R_CRIS_32_DTPREL), - TLSHOWTO16 (R_CRIS_16_DTPREL), + TLSHOWTO16S (R_CRIS_16_DTPREL), TLSHOWTO32 (R_CRIS_32_GOT_TPREL), - TLSHOWTO16 (R_CRIS_16_GOT_TPREL), + TLSHOWTO16S (R_CRIS_16_GOT_TPREL), TLSHOWTO32 (R_CRIS_32_TPREL), - TLSHOWTO16 (R_CRIS_16_TPREL), - TLSHOWTO32 (R_CRIS_DTPMOD) + TLSHOWTO16S (R_CRIS_16_TPREL), + TLSHOWTO32 (R_CRIS_DTPMOD), + TLSHOWTO32 (R_CRIS_32_IE) }; /* Map BFD reloc types to CRIS ELF reloc types. */ @@ -476,7 +480,8 @@ static const struct cris_reloc_map cris_reloc_map [] = { BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL }, { BFD_RELOC_CRIS_32_TPREL, R_CRIS_32_TPREL }, { BFD_RELOC_CRIS_16_TPREL, R_CRIS_16_TPREL }, - { BFD_RELOC_CRIS_DTPMOD, R_CRIS_DTPMOD } + { BFD_RELOC_CRIS_DTPMOD, R_CRIS_DTPMOD }, + { BFD_RELOC_CRIS_32_IE, R_CRIS_32_IE } }; static reloc_howto_type * @@ -516,7 +521,7 @@ cris_info_to_howto_rela (abfd, cache_ptr, dst) arelent * cache_ptr; Elf_Internal_Rela * dst; { - unsigned int r_type; + enum elf_cris_reloc_type r_type; r_type = ELF32_R_TYPE (dst->r_info); BFD_ASSERT (r_type < (unsigned int) R_CRIS_max); @@ -791,10 +796,15 @@ struct elf_cris_pcrel_relocs_copied { /* Next section. */ struct elf_cris_pcrel_relocs_copied *next; + /* A section in dynobj. */ asection *section; + /* Number of relocs copied in this section. */ bfd_size_type count; + + /* Example of reloc being copied, for message. */ + enum elf_cris_reloc_type r_type; }; /* CRIS ELF linker hash entry. */ @@ -818,8 +828,39 @@ struct elf_cris_link_hash_entry this with gotplt_refcount in a union, like the got and plt unions in elf_link_hash_entry. */ bfd_size_type gotplt_offset; + + /* The root.got.refcount is the sum of the regular reference counts + (this) and those members below. We have to keep a separate count + to track when we've found the first (or last) reference to a + regular got entry. The offset is in root.got.offset. */ + bfd_signed_vma reg_got_refcount; + + /* Similar to the above, the number of reloc references to this + symbols that need a R_CRIS_32_TPREL slot. The offset is in + root.got.offset, because this and .dtp_refcount can't validly + happen when there's also a regular GOT entry; that's invalid + input for which an error is emitted. */ + bfd_signed_vma tprel_refcount; + + /* Similar to the above, the number of reloc references to this + symbols that need a R_CRIS_DTP slot. The offset is in + root.got.offset; plus 4 if .tprel_refcount > 0. */ + bfd_signed_vma dtp_refcount; }; +/* The local_got_refcounts and local_got_offsets are a multiple of + LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the + refcount for GOT itself, see code), with the summary / group offset + for local symbols located at offset N, reference counts for + ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP + relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N + + 3*LSNUM. */ + +#define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info) +#define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info) +#define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info) +#define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4) + /* CRIS ELF linker hash table. */ struct elf_cris_link_hash_table @@ -830,6 +871,13 @@ struct elf_cris_link_hash_table since we try and avoid creating GOTPLT:s when there's already a GOT. Instead, we keep and update the next available index here. */ bfd_size_type next_gotplt_entry; + + /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have + been seen for any input; if != 0, then the constant-offset + R_CRIS_DTPMOD is needed for this DSO/executable. This turns + negative at relocation, so that we don't need an extra flag for + when the reloc is output. */ + bfd_signed_vma dtpmod_refcount; }; /* Traverse a CRIS ELF linker hash table. */ @@ -845,6 +893,13 @@ struct elf_cris_link_hash_table #define elf_cris_hash_table(p) \ ((struct elf_cris_link_hash_table *) (p)->hash) +/* Get the CRIS ELF linker hash entry from a regular hash entry (the + "parent class"). The .root reference is just a simple type + check on the argument. */ + +#define elf_cris_hash_entry(p) \ + ((struct elf_cris_link_hash_entry *) (&(p)->root)) + /* Create an entry in a CRIS ELF linker hash table. */ static struct bfd_hash_entry * @@ -874,6 +929,9 @@ elf_cris_link_hash_newfunc (entry, table, string) ret->pcrel_relocs_copied = NULL; ret->gotplt_refcount = 0; ret->gotplt_offset = 0; + ret->dtp_refcount = 0; + ret->tprel_refcount = 0; + ret->reg_got_refcount = 0; } return (struct bfd_hash_entry *) ret; @@ -904,6 +962,9 @@ elf_cris_link_hash_table_create (abfd) are used for run-time symbol evaluation. */ ret->next_gotplt_entry = 12; + /* We haven't seen any R_CRIS_nn_GOT_TPREL initially. */ + ret->dtpmod_refcount = 0; + return &ret->root.root; } @@ -921,11 +982,12 @@ cris_final_link_relocate (howto, input_bfd, input_section, contents, rel, bfd_vma relocation; { bfd_reloc_status_type r; + enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info); /* PC-relative relocations are relative to the position *after* the reloc. Note that for R_CRIS_8_PCREL the adjustment is not a single byte, since PC must be 16-bit-aligned. */ - switch (ELF32_R_TYPE (rel->r_info)) + switch (r_type) { /* Check that the 16-bit GOT relocs are positive. */ case R_CRIS_16_GOTPLT: @@ -953,6 +1015,14 @@ cris_final_link_relocate (howto, input_bfd, input_section, contents, rel, return r; } + +/* The number of errors left before we stop outputting reloc-specific + explanatory messages. By coincidence, this works nicely together + with the default number of messages you'll get from LD about + "relocation truncated to fit" messages before you get an + "additional relocation overflows omitted from the output". */ +static int additional_relocation_error_msg_count = 10; + /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was copied, for further comments. */ @@ -977,6 +1047,7 @@ cris_elf_relocate_section (output_bfd, info, input_bfd, input_section, asection *sreloc; Elf_Internal_Rela *rel; Elf_Internal_Rela *relend; + asection *srelgot; dynobj = elf_hash_table (info)->dynobj; local_got_offsets = elf_local_got_offsets (input_bfd); @@ -987,6 +1058,7 @@ cris_elf_relocate_section (output_bfd, info, input_bfd, input_section, sgot = NULL; splt = NULL; sreloc = NULL; + srelgot = NULL; if (dynobj != NULL) { @@ -1004,7 +1076,7 @@ cris_elf_relocate_section (output_bfd, info, input_bfd, input_section, bfd_vma relocation; bfd_reloc_status_type r; const char *symname = NULL; - int r_type; + enum elf_cris_reloc_type r_type; r_type = ELF32_R_TYPE (rel->r_info); @@ -1039,6 +1111,8 @@ cris_elf_relocate_section (output_bfd, info, input_bfd, input_section, h, sec, relocation, unresolved_reloc, warned); + symname = h->root.root.string; + if (unresolved_reloc /* Perhaps we should detect the cases that sec->output_section is expected to be NULL like i386 and @@ -1257,20 +1331,21 @@ cris_elf_relocate_section (output_bfd, info, input_bfd, input_section, if (info->shared) { - asection *s; Elf_Internal_Rela outrel; bfd_byte *loc; - s = bfd_get_section_by_name (dynobj, ".rela.got"); - BFD_ASSERT (s != NULL); + if (srelgot == NULL) + srelgot + = bfd_get_section_by_name (dynobj, ".rela.got"); + BFD_ASSERT (srelgot != NULL); outrel.r_offset = (sgot->output_section->vma + sgot->output_offset + off); outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE); outrel.r_addend = relocation; - loc = s->contents; - loc += s->reloc_count++ * sizeof (Elf32_External_Rela); + loc = srelgot->contents; + loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); } @@ -1406,7 +1481,8 @@ cris_elf_relocate_section (output_bfd, info, input_bfd, input_section, case R_CRIS_16_PCREL: case R_CRIS_32_PCREL: /* If the symbol was local, we need no shlib-specific handling. */ - if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) + if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT + || h->dynindx == -1) break; /* Fall through. */ @@ -1420,7 +1496,7 @@ cris_elf_relocate_section (output_bfd, info, input_bfd, input_section, && r_type != R_CRIS_16_PCREL && r_type != R_CRIS_32_PCREL) || (!info->symbolic - || !h->def_regular))) + || (h != NULL && !h->def_regular)))) { Elf_Internal_Rela outrel; bfd_byte *loc; @@ -1432,33 +1508,13 @@ cris_elf_relocate_section (output_bfd, info, input_bfd, input_section, if (sreloc == NULL) { - const char *name; - - name = (bfd_elf_string_from_elf_section - (input_bfd, - elf_elfheader (input_bfd)->e_shstrndx, - elf_section_data (input_section)->rel_hdr.sh_name)); - if (name == NULL) - return FALSE; - - BFD_ASSERT (CONST_STRNEQ (name, ".rela") - && strcmp (bfd_get_section_name (input_bfd, - input_section), - name + 5) == 0); - - sreloc = bfd_get_section_by_name (dynobj, name); - - /* That section should have been created in - cris_elf_check_relocs, but that function will not be - called for objects which fail in + sreloc = _bfd_elf_get_dynamic_reloc_section + (input_bfd, input_section, /*rela?*/ TRUE); + /* The section should have been created in cris_elf_check_relocs, + but that function will not be called for objects which fail in cris_elf_merge_private_bfd_data. */ if (sreloc == NULL) { - (*_bfd_error_handler) - (_("%B: Internal inconsistency; no relocation section %s"), - input_bfd, - name); - bfd_set_error (bfd_error_bad_value); return FALSE; } @@ -1546,6 +1602,413 @@ cris_elf_relocate_section (output_bfd, info, input_bfd, input_section, } break; + + case R_CRIS_16_DTPREL: + case R_CRIS_32_DTPREL: + /* This relocation must only be performed against local + symbols. It's also ok when we link a program and the + symbol is defined in an ordinary (non-DSO) object (if + it's undefined there, we've already seen an error). */ + if (h != NULL + && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + && (info->shared + || (!h->def_regular + && h->root.type != bfd_link_hash_undefined))) + { + (*_bfd_error_handler) + ((h->root.type == bfd_link_hash_undefined) + /* We shouldn't get here for GCC-emitted code. */ + ? _("%B, section %A: relocation %s has an undefined" + " reference to `%s', perhaps a declaration mixup?") + : ("%B, section %A: relocation %s is" + " not allowed for `%s', a global symbol with default" + " visibility, perhaps a declaration mixup?"), + input_bfd, + input_section, + cris_elf_howto_table[r_type].name, + symname != NULL && symname[0] != '\0' + ? symname : _("[whose name is lost]")); + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + + BFD_ASSERT (elf_cris_hash_table (info)->dtpmod_refcount != 0); + + /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't + already done so. Note that we do this in .got.plt, not + in .got, as .got.plt contains the first part, still the + reloc is against .got, because the linker script directs + (is required to direct) them both into .got. */ + if (elf_cris_hash_table (info)->dtpmod_refcount > 0) + { + asection *sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); + BFD_ASSERT (sgotplt != NULL); + + if (info->shared) + { + Elf_Internal_Rela outrel; + bfd_byte *loc; + + if (srelgot == NULL) + srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); + BFD_ASSERT (srelgot != NULL); + loc = srelgot->contents; + loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); + + bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12); + bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16); + outrel.r_offset = (sgotplt->output_section->vma + + sgotplt->output_offset + + 12); + outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD); + outrel.r_addend = 0; + bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); + } + else + { + /* For an executable, the GOT entry contents is known. */ + bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12); + bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16); + } + + /* Reverse the sign to mark that we've emitted the + required GOT entry. */ + elf_cris_hash_table (info)->dtpmod_refcount + = -elf_cris_hash_table (info)->dtpmod_refcount; + } + + /* The thread-based offset to the local symbol is the + relocation. */ + relocation -= elf_hash_table (info)->tls_sec == NULL + ? 0 : elf_hash_table (info)->tls_sec->vma; + break; + + case R_CRIS_32_GD: + if (info->shared) + { + bfd_set_error (bfd_error_invalid_operation); + + /* We've already informed in cris_elf_check_relocs that + this is an error. */ + return FALSE; + } + /* Fall through. */ + + case R_CRIS_16_GOT_GD: + case R_CRIS_32_GOT_GD: + if (rel->r_addend != 0) + { + /* We can't do anything for a relocation which is against a + symbol *plus offset*. The GOT holds relocations for + symbols. Make this an error; the compiler isn't allowed + to pass us these kinds of things. */ + (*_bfd_error_handler) + (_("%B, section %A: relocation %s with non-zero addend %d" + " against symbol `%s'"), + input_bfd, + input_section, + cris_elf_howto_table[r_type].name, + rel->r_addend, + symname[0] != '\0' ? symname : _("[whose name is lost]")); + + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + + if (!info->shared && (h == NULL || h->def_regular)) + { + /* Known contents of the GOT. */ + bfd_vma off; + + /* The symbol is defined in the program, so just write + (1, known_tpoffset) into the GOT. */ + relocation -= elf_hash_table (info)->tls_sec->vma; + + if (h != NULL) + { + off = elf_cris_hash_entry (h)->tprel_refcount > 0 + ? h->got.offset + 4 : h->got.offset; + } + else + { + off = local_got_offsets[r_symndx]; + if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)]) + off += 4; + } + + /* We use bit 1 of the offset as a flag for GOT entry with + the R_CRIS_DTP reloc, setting it when we've emitted the + GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL + relocs. */ + if ((off & 2) == 0) + { + off &= ~3; + + if (h != NULL) + h->got.offset |= 2; + else + local_got_offsets[r_symndx] |= 2; + + bfd_put_32 (output_bfd, 1, sgot->contents + off); + bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4); + } + else + off &= ~3; + + relocation = sgot->output_offset + off + + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0); + } + else + { + /* Not all parts of the GOT entry are known; emit a real + relocation. */ + bfd_vma off; + + if (h != NULL) + off = elf_cris_hash_entry (h)->tprel_refcount > 0 + ? h->got.offset + 4 : h->got.offset; + else + { + off = local_got_offsets[r_symndx]; + if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)]) + off += 4; + } + + /* See above re bit 1 and bit 0 usage. */ + if ((off & 2) == 0) + { + Elf_Internal_Rela outrel; + bfd_byte *loc; + + off &= ~3; + + if (h != NULL) + h->got.offset |= 2; + else + local_got_offsets[r_symndx] |= 2; + + /* Clear the target contents of the GOT (just as a + gesture; it's already cleared on allocation): this + relocation is not like the other dynrelocs. */ + bfd_put_32 (output_bfd, 0, sgot->contents + off); + bfd_put_32 (output_bfd, 0, sgot->contents + off + 4); + + if (srelgot == NULL) + srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); + BFD_ASSERT (srelgot != NULL); + + if (h != NULL && h->dynindx != -1) + { + outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP); + relocation = 0; + } + else + { + outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP); + + /* NULL if we had an error. */ + relocation -= elf_hash_table (info)->tls_sec == NULL + ? 0 : elf_hash_table (info)->tls_sec->vma; + } + + outrel.r_offset = (sgot->output_section->vma + + sgot->output_offset + + off); + outrel.r_addend = relocation; + loc = srelgot->contents; + loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); + + /* NULL if we had an error. */ + if (srelgot->contents != NULL) + bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); + } + else + off &= ~3; + + relocation = sgot->output_offset + off + + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0); + } + + /* The GOT-relative offset to the GOT entry is the + relocation, or for R_CRIS_32_GD, the actual address of + the GOT entry. */ + break; + + case R_CRIS_32_IE: + if (info->shared) + { + bfd_set_error (bfd_error_invalid_operation); + + /* We've already informed in cris_elf_check_relocs that + this is an error. */ + return FALSE; + } + /* Fall through. */ + + case R_CRIS_32_GOT_TPREL: + case R_CRIS_16_GOT_TPREL: + if (rel->r_addend != 0) + { + /* We can't do anything for a relocation which is + against a symbol *plus offset*. GOT holds + relocations for symbols. Make this an error; the + compiler isn't allowed to pass us these kinds of + things. */ + (*_bfd_error_handler) + (_("%B, section %A: relocation %s with non-zero addend %d" + " against symbol `%s'"), + input_bfd, + input_section, + cris_elf_howto_table[r_type].name, + rel->r_addend, + symname[0] != '\0' ? symname : _("[whose name is lost]")); + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + + if (!info->shared && (h == NULL || h->def_regular)) + { + /* Known contents of the GOT. */ + bfd_vma off; + + /* The symbol is defined in the program, so just write + the known_tpoffset into the GOT. */ + relocation -= elf_hash_table (info)->tls_sec->vma; + + if (h != NULL) + off = h->got.offset; + else + off = local_got_offsets[r_symndx]; + + /* Bit 0 is used to mark whether we've emitted the required + entry (and if needed R_CRIS_32_TPREL reloc). Bit 1 + is used similarly for R_CRIS_DTP, see above. */ + if ((off & 1) == 0) + { + off &= ~3; + + if (h != NULL) + h->got.offset |= 1; + else + local_got_offsets[r_symndx] |= 1; + + bfd_put_32 (output_bfd, relocation, sgot->contents + off); + } + else + off &= ~3; + + relocation = sgot->output_offset + off + + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0); + } + else + { + /* Emit a real relocation. */ + bfd_vma off; + + if (h != NULL) + off = h->got.offset; + else + off = local_got_offsets[r_symndx]; + + /* See above re usage of bit 0 and 1. */ + if ((off & 1) == 0) + { + Elf_Internal_Rela outrel; + bfd_byte *loc; + + off &= ~3; + + if (h != NULL) + h->got.offset |= 1; + else + local_got_offsets[r_symndx] |= 1; + + if (srelgot == NULL) + srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); + BFD_ASSERT (srelgot != NULL); + + if (h != NULL && h->dynindx != -1) + { + outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL); + relocation = 0; + } + else + { + outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL); + + /* NULL if we had an error. */ + relocation -= elf_hash_table (info)->tls_sec == NULL + ? 0 : elf_hash_table (info)->tls_sec->vma; + } + + /* Just "define" the initial contents in some + semi-logical way. */ + bfd_put_32 (output_bfd, relocation, sgot->contents + off); + + outrel.r_offset = (sgot->output_section->vma + + sgot->output_offset + + off); + outrel.r_addend = relocation; + loc = srelgot->contents; + loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); + /* NULL if we had an error. */ + if (srelgot->contents != NULL) + bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); + } + else + off &= ~3; + + relocation = sgot->output_offset + off + + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0); + } + + /* The GOT-relative offset to the GOT entry is the relocation, + or for R_CRIS_32_GD, the actual address of the GOT entry. */ + break; + + case R_CRIS_16_TPREL: + case R_CRIS_32_TPREL: + /* This relocation must only be performed against symbols + defined in an ordinary (non-DSO) object. */ + if (info->shared) + { + bfd_set_error (bfd_error_invalid_operation); + + /* We've already informed in cris_elf_check_relocs that + this is an error. */ + return FALSE; + } + + if (h != NULL + && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + && !h->def_regular + /* If it's undefined, then an error message has already + been emitted. */ + && h->root.type != bfd_link_hash_undefined) + { + (*_bfd_error_handler) + (_("%B, section %A: relocation %s is" + " not allowed for symbol: `%s'" + " which is defined outside the program," + " perhaps a declaration mixup?"), + input_bfd, + input_section, + cris_elf_howto_table[r_type].name, + symname); + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + + /* NULL if we had an error. */ + relocation -= elf_hash_table (info)->tls_sec == NULL + ? 0 : elf_hash_table (info)->tls_sec->vma; + + /* The TLS-relative offset is the relocation. */ + break; + + default: + BFD_FAIL (); + return FALSE; } r = cris_final_link_relocate (howto, input_bfd, input_section, @@ -1561,6 +2024,37 @@ cris_elf_relocate_section (output_bfd, info, input_bfd, input_section, r = info->callbacks->reloc_overflow (info, (h ? &h->root : NULL), symname, howto->name, (bfd_vma) 0, input_bfd, input_section, rel->r_offset); + if (additional_relocation_error_msg_count > 0) + { + additional_relocation_error_msg_count--; + switch (r_type) + { + case R_CRIS_16_GOTPLT: + case R_CRIS_16_GOT: + + /* Not just TLS is involved here, so we make + generation and message depend on -fPIC/-fpic + only. */ + case R_CRIS_16_GOT_TPREL: + case R_CRIS_16_GOT_GD: + (*_bfd_error_handler) + (_("(too many global variables for -fpic:" + " recompile with -fPIC)")); + break; + + case R_CRIS_16_TPREL: + case R_CRIS_16_DTPREL: + (*_bfd_error_handler) + (_("(thread-local data too big for -fpic or" + " -msmall-tls: recompile with -fPIC or" + " -mno-small-tls)")); + break; + + /* No known cause for overflow for other relocs. */ + default: + break; + } + } break; case bfd_reloc_undefined: @@ -1647,7 +2141,7 @@ elf_cris_finish_dynamic_symbol (output_bfd, info, h, sym) bfd_vma got_base; bfd_vma gotplt_offset - = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset; + = elf_cris_hash_entry (h)->gotplt_offset; Elf_Internal_Rela rela; bfd_byte *loc; bfd_boolean has_gotplt = gotplt_offset != 0; @@ -1760,6 +2254,7 @@ elf_cris_finish_dynamic_symbol (output_bfd, info, h, sym) where we do not output a PLT: the PLT reloc was output above and all references to the function symbol are redirected to the PLT. */ if (h->got.offset != (bfd_vma) -1 + && (elf_cris_hash_entry (h)->reg_got_refcount > 0) && (info->shared || (h->dynindx != -1 && h->plt.offset == (bfd_vma) -1 @@ -1841,7 +2336,9 @@ elf_cris_finish_dynamic_symbol (output_bfd, info, h, sym) return TRUE; } -/* Finish up the dynamic sections. */ +/* Finish up the dynamic sections. Do *not* emit relocs here, as their + offsets were changed, as part of -z combreloc handling, from those we + computed. */ static bfd_boolean elf_cris_finish_dynamic_sections (output_bfd, info) @@ -1994,12 +2491,16 @@ cris_elf_gc_mark_hook (asection *sec, struct elf_link_hash_entry *h, Elf_Internal_Sym *sym) { + enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info); if (h != NULL) - switch (ELF32_R_TYPE (rel->r_info)) + switch (r_type) { case R_CRIS_GNU_VTINHERIT: case R_CRIS_GNU_VTENTRY: return NULL; + + default: + break; } return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); @@ -2040,6 +2541,9 @@ cris_elf_gc_sweep_hook (bfd *abfd, { unsigned long r_symndx; struct elf_link_hash_entry *h = NULL; + bfd_signed_vma got_element_size = 4; + bfd_signed_vma *specific_refcount = NULL; + enum elf_cris_reloc_type r_type; r_symndx = ELF32_R_SYM (rel->r_info); if (r_symndx >= symtab_hdr->sh_info) @@ -2050,21 +2554,63 @@ cris_elf_gc_sweep_hook (bfd *abfd, h = (struct elf_link_hash_entry *) h->root.u.i.link; } - switch (ELF32_R_TYPE (rel->r_info)) + r_type = ELF32_R_TYPE (rel->r_info); + switch (r_type) { + case R_CRIS_32_GOT: + case R_CRIS_16_GOT: + case R_CRIS_16_GOTPLT: + case R_CRIS_32_GOTPLT: + specific_refcount = h != NULL + ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount + : &local_got_refcounts[LGOT_REG_NDX (r_symndx)]; + break; + + case R_CRIS_32_GD: + case R_CRIS_32_GOT_GD: + case R_CRIS_16_GOT_GD: + got_element_size = 8; + specific_refcount = h != NULL + ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount + : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)]; + break; + + case R_CRIS_32_IE: + case R_CRIS_16_GOT_TPREL: + case R_CRIS_32_GOT_TPREL: + specific_refcount = h != NULL + ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount + : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)]; + break; + + default: + break; + } + + switch (r_type) + { + case R_CRIS_32_IE: + case R_CRIS_32_GD: + case R_CRIS_16_GOT_TPREL: + case R_CRIS_32_GOT_TPREL: + case R_CRIS_32_GOT_GD: + case R_CRIS_16_GOT_GD: case R_CRIS_16_GOT: case R_CRIS_32_GOT: if (h != NULL) { - if (h->got.refcount > 0) + /* If the counters are 0 when we got here, we've + miscounted somehow somewhere, an internal error. */ + BFD_ASSERT (h->got.refcount > 0); + --h->got.refcount; + + BFD_ASSERT (*specific_refcount > 0); + --*specific_refcount; + if (*specific_refcount == 0) { - --h->got.refcount; - if (h->got.refcount == 0) - { - /* We don't need the .got entry any more. */ - sgot->size -= 4; - srelgot->size -= sizeof (Elf32_External_Rela); - } + /* We don't need the .got entry any more. */ + sgot->size -= got_element_size; + srelgot->size -= sizeof (Elf32_External_Rela); } break; } @@ -2072,16 +2618,19 @@ cris_elf_gc_sweep_hook (bfd *abfd, local_got_reloc: if (local_got_refcounts != NULL) { - if (local_got_refcounts[r_symndx] > 0) + /* If the counters are 0 when we got here, we've + miscounted somehow somewhere, an internal error. */ + BFD_ASSERT (local_got_refcounts[r_symndx] > 0); + --local_got_refcounts[r_symndx]; + + BFD_ASSERT (*specific_refcount > 0); + --*specific_refcount; + if (*specific_refcount == 0) { - --local_got_refcounts[r_symndx]; - if (local_got_refcounts[r_symndx] == 0) - { - /* We don't need the .got entry any more. */ - sgot->size -= 4; - if (info->shared) - srelgot->size -= sizeof (Elf32_External_Rela); - } + /* We don't need the .got entry any more. */ + sgot->size -= got_element_size; + if (info->shared) + srelgot->size -= sizeof (Elf32_External_Rela); } } break; @@ -2111,6 +2660,15 @@ cris_elf_gc_sweep_hook (bfd *abfd, } break; + case R_CRIS_32_DTPREL: + case R_CRIS_16_DTPREL: + elf_cris_hash_table (info)->dtpmod_refcount--; + if (elf_cris_hash_table (info)->dtpmod_refcount == 0) + elf_cris_hash_table (info)->next_gotplt_entry -= 8; + BFD_ASSERT (local_got_refcounts != NULL); + local_got_refcounts[-1]--; + break; + default: break; } @@ -2140,12 +2698,13 @@ elf_cris_adjust_gotplt_to_got (h, p) if (h->gotplt_refcount <= 0) return TRUE; - if (h->root.got.refcount > 0) + if (h->reg_got_refcount > 0) { - /* There's a GOT entry for this symbol. Just adjust the refcount. - Probably not necessary at this stage, but keeping it accurate + /* There's a GOT entry for this symbol. Just adjust the refcounts. + Probably not necessary at this stage, but keeping them accurate helps avoiding surprises later. */ h->root.got.refcount += h->gotplt_refcount; + h->reg_got_refcount += h->gotplt_refcount; h->gotplt_refcount = 0; } else @@ -2159,8 +2718,9 @@ elf_cris_adjust_gotplt_to_got (h, p) sgot = bfd_get_section_by_name (dynobj, ".got"); srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); - /* Put an accurate refcount there. */ - h->root.got.refcount = h->gotplt_refcount; + /* Put accurate refcounts there. */ + h->root.got.refcount += h->gotplt_refcount; + h->reg_got_refcount = h->gotplt_refcount; h->gotplt_refcount = 0; @@ -2470,6 +3030,40 @@ elf_cris_adjust_dynamic_symbol (info, h) return _bfd_elf_adjust_dynamic_copy (h, s); } +/* Adjust our "subclass" elements for an indirect symbol. */ + +static void +elf_cris_copy_indirect_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *dir, + struct elf_link_hash_entry *ind) +{ + struct elf_cris_link_hash_entry *edir, *eind; + + edir = (struct elf_cris_link_hash_entry *) dir; + eind = (struct elf_cris_link_hash_entry *) ind; + + /* Only indirect symbols are replaced; we're not interested in + updating any of EIND's fields for other symbols. */ + if (eind->root.root.type != bfd_link_hash_indirect) + return; + + BFD_ASSERT (edir->pcrel_relocs_copied == NULL); + BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0); + +#define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z +#define XMOVE(F) XMOVOPZ (F, +=, 0) + XMOVOPZ (pcrel_relocs_copied, =, NULL); + XMOVE (gotplt_refcount); + XMOVE (gotplt_offset); + XMOVE (reg_got_refcount); + XMOVE (tprel_refcount); + XMOVE (dtp_refcount); +#undef XMOVE +#undef XMOVOPZ + + _bfd_elf_link_hash_copy_indirect (info, dir, ind); +} + /* Look through the relocs for a section during the first phase. */ static bfd_boolean @@ -2507,10 +3101,15 @@ cris_elf_check_relocs (abfd, info, sec, relocs) struct elf_link_hash_entry *h; unsigned long r_symndx; enum elf_cris_reloc_type r_type; + bfd_signed_vma got_element_size = 4; + unsigned long r_symndx_lgot = INT_MAX; r_symndx = ELF32_R_SYM (rel->r_info); if (r_symndx < symtab_hdr->sh_info) - h = NULL; + { + h = NULL; + r_symndx_lgot = LGOT_REG_NDX (r_symndx); + } else { h = sym_hashes[r_symndx - symtab_hdr->sh_info]; @@ -2525,6 +3124,21 @@ cris_elf_check_relocs (abfd, info, sec, relocs) on the first input bfd we found that contained dynamic relocs. */ switch (r_type) { + case R_CRIS_16_DTPREL: + case R_CRIS_32_DTPREL: + /* The first .got.plt entry is right after the R_CRIS_DTPMOD + entry at index 3. */ + if (elf_cris_hash_table (info)->dtpmod_refcount == 0) + elf_cris_hash_table (info)->next_gotplt_entry += 8; + elf_cris_hash_table (info)->dtpmod_refcount++; + /* Fall through. */ + + case R_CRIS_32_IE: + case R_CRIS_32_GD: + case R_CRIS_16_GOT_GD: + case R_CRIS_32_GOT_GD: + case R_CRIS_32_GOT_TPREL: + case R_CRIS_16_GOT_TPREL: case R_CRIS_16_GOT: case R_CRIS_32_GOT: case R_CRIS_32_GOTREL: @@ -2553,6 +3167,26 @@ cris_elf_check_relocs (abfd, info, sec, relocs) if (!_bfd_elf_create_got_section (dynobj, info)) return FALSE; } + + if (sgot == NULL) + sgot = bfd_get_section_by_name (dynobj, ".got"); + + if (local_got_refcounts == NULL) + { + bfd_size_type amt; + + /* We use index local_got_refcounts[-1] to count all + GOT-relative relocations that do not have explicit + GOT entries. */ + amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1; + amt *= sizeof (bfd_signed_vma); + local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt)); + if (local_got_refcounts == NULL) + return FALSE; + + local_got_refcounts++; + elf_local_got_refcounts (abfd) = local_got_refcounts; + } break; default: @@ -2563,6 +3197,24 @@ cris_elf_check_relocs (abfd, info, sec, relocs) specific GOT entry). */ switch (r_type) { + case R_CRIS_16_DTPREL: + case R_CRIS_32_DTPREL: + /* Not requesting .got.rela for an executable: the contents + of the first entry is constant there. For a shared + library, we need .got.rela for the R_CRIS_DTPMOD + relocation at index 3. */ + if (!info->shared) + break; + /* Fall through. */ + + case R_CRIS_32_IE: + case R_CRIS_32_GD: + case R_CRIS_16_GOT_GD: + case R_CRIS_32_GOT_GD: + case R_CRIS_32_GOT_TPREL: + case R_CRIS_16_GOT_TPREL: + /* Fall through. */ + /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT entry only for local symbols. Unfortunately, we don't know until later on if there's a version script that forces the @@ -2593,31 +3245,69 @@ cris_elf_check_relocs (abfd, info, sec, relocs) return FALSE; } } - /* Fall through. */ + break; - case R_CRIS_32_GOTREL: - case R_CRIS_32_PLT_GOTREL: - if (sgot == NULL) - sgot = bfd_get_section_by_name (dynobj, ".got"); + default: + break; + } - if (local_got_refcounts == NULL) + /* Warn and error for invalid input. */ + switch (r_type) + { + case R_CRIS_32_IE: + case R_CRIS_32_TPREL: + case R_CRIS_16_TPREL: + case R_CRIS_32_GD: + if (info->shared) { - bfd_size_type amt; + (*_bfd_error_handler) + (_("%B, section %A:\n relocation %s not valid" + " in a shared object;" + " typically an option mixup, recompile with -fPIC"), + abfd, + sec, + cris_elf_howto_table[r_type].name); + /* Don't return FALSE here; we want messages for all of + these and the error behavior is ungraceful + anyway. */ + } + default: + break; + } - /* We use index local_got_refcounts[-1] to count all - GOT-relative relocations that do not have explicit - GOT entries. */ - amt = symtab_hdr->sh_info + 1; - amt *= sizeof (bfd_signed_vma); - local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt)); - if (local_got_refcounts == NULL) - return FALSE; + switch (r_type) + { + case R_CRIS_32_GD: + case R_CRIS_16_GOT_GD: + case R_CRIS_32_GOT_GD: + /* These are requests for tls_index entries, run-time R_CRIS_DTP. */ + got_element_size = 8; + r_symndx_lgot = LGOT_DTP_NDX (r_symndx); + break; - local_got_refcounts++; - elf_local_got_refcounts (abfd) = local_got_refcounts; - } + case R_CRIS_16_DTPREL: + case R_CRIS_32_DTPREL: + /* These two just request for the constant-index + module-local tls_index-sized GOT entry, which we add + elsewhere. */ break; + case R_CRIS_32_IE: + case R_CRIS_32_GOT_TPREL: + case R_CRIS_16_GOT_TPREL: + r_symndx_lgot = LGOT_TPREL_NDX (r_symndx); + + /* Those relocs also require that a DSO is of type + Initial Exec. Like other targets, we don't reset this + flag even if the relocs are GC:ed away. */ + if (info->shared) + info->flags |= DF_STATIC_TLS; + break; + + /* Let's list the other assembler-generated TLS-relocs too, + just to show that they're not forgotten. */ + case R_CRIS_16_TPREL: + case R_CRIS_32_TPREL: default: break; } @@ -2631,13 +3321,19 @@ cris_elf_check_relocs (abfd, info, sec, relocs) symbol. */ if (h != NULL) { - ((struct elf_cris_link_hash_entry *) h)->gotplt_refcount++; + elf_cris_hash_entry (h)->gotplt_refcount++; goto handle_gotplt_reloc; } /* If h is NULL then this is a local symbol, and we must make a GOT entry for it, so handle it like a GOT reloc. */ /* Fall through. */ + case R_CRIS_32_IE: + case R_CRIS_32_GD: + case R_CRIS_16_GOT_GD: + case R_CRIS_32_GOT_GD: + case R_CRIS_32_GOT_TPREL: + case R_CRIS_16_GOT_TPREL: case R_CRIS_16_GOT: case R_CRIS_32_GOT: /* This symbol requires a global offset table entry. */ @@ -2651,32 +3347,81 @@ cris_elf_check_relocs (abfd, info, sec, relocs) if (!bfd_elf_link_record_dynamic_symbol (info, h)) return FALSE; } - - /* Allocate space in the .got section. */ - sgot->size += 4; - /* Allocate relocation space. */ - srelgot->size += sizeof (Elf32_External_Rela); } + + /* Update the sum of reloc counts for this symbol. */ h->got.refcount++; + + switch (r_type) + { + case R_CRIS_16_GOT: + case R_CRIS_32_GOT: + if (elf_cris_hash_entry (h)->reg_got_refcount == 0) + { + /* Allocate space in the .got section. */ + sgot->size += got_element_size; + /* Allocate relocation space. */ + srelgot->size += sizeof (Elf32_External_Rela); + } + elf_cris_hash_entry (h)->reg_got_refcount++; + break; + + case R_CRIS_32_GD: + case R_CRIS_16_GOT_GD: + case R_CRIS_32_GOT_GD: + if (elf_cris_hash_entry (h)->dtp_refcount == 0) + { + /* Allocate space in the .got section. */ + sgot->size += got_element_size; + /* Allocate relocation space. */ + srelgot->size += sizeof (Elf32_External_Rela); + } + elf_cris_hash_entry (h)->dtp_refcount++; + break; + + case R_CRIS_32_IE: + case R_CRIS_32_GOT_TPREL: + case R_CRIS_16_GOT_TPREL: + if (elf_cris_hash_entry (h)->tprel_refcount == 0) + { + /* Allocate space in the .got section. */ + sgot->size += got_element_size; + /* Allocate relocation space. */ + srelgot->size += sizeof (Elf32_External_Rela); + } + elf_cris_hash_entry (h)->tprel_refcount++; + break; + + default: + BFD_FAIL (); + break; + } } else { /* This is a global offset table entry for a local symbol. */ - if (local_got_refcounts[r_symndx] == 0) + if (local_got_refcounts[r_symndx_lgot] == 0) { - sgot->size += 4; + sgot->size += got_element_size; if (info->shared) { - /* If we are generating a shared object, we need to - output a R_CRIS_RELATIVE reloc so that the dynamic - linker can adjust this GOT entry. */ + /* If we are generating a shared object, we need + to output a R_CRIS_RELATIVE reloc so that the + dynamic linker can adjust this GOT entry. + Similarly for non-regular got entries. */ srelgot->size += sizeof (Elf32_External_Rela); } } + /* Update the reloc-specific count. */ + local_got_refcounts[r_symndx_lgot]++; + + /* This one is the sum of all the others. */ local_got_refcounts[r_symndx]++; } break; + case R_CRIS_16_DTPREL: + case R_CRIS_32_DTPREL: case R_CRIS_32_GOTREL: /* This reference requires a global offset table. FIXME: The actual refcount isn't used currently; the .got @@ -2717,12 +3462,13 @@ cris_elf_check_relocs (abfd, info, sec, relocs) case R_CRIS_16: case R_CRIS_32: /* Let's help debug shared library creation. Any of these - relocs can be used in shared libs, but pages containing them - cannot be shared. Don't warn for sections we don't care - about, such as debug sections or non-constant sections. We - can't help tables of (global) function pointers, for example, - though they must be emitted in a data section to avoid having - impure text sections. */ + relocs *can* be used in shared libs, but pages containing + them cannot be shared, so they're not appropriate for + common use. Don't warn for sections we don't care about, + such as debug sections or non-constant sections. We + can't help tables of (global) function pointers, for + example, though they must be emitted in a (writable) data + section to avoid having impure text sections. */ if (info->shared && (sec->flags & SEC_ALLOC) != 0 && (sec->flags & SEC_READONLY) != 0) @@ -2735,7 +3481,56 @@ cris_elf_check_relocs (abfd, info, sec, relocs) sec, cris_elf_howto_table[r_type].name); } - /* Fall through. */ + if (h != NULL) + { + h->non_got_ref = 1; + + /* Make sure a plt entry is created for this symbol if it + turns out to be a function defined by a dynamic object. */ + if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) + h->plt.refcount++; + } + + /* If we are creating a shared library and this is not a local + symbol, we need to copy the reloc into the shared library. + However when linking with -Bsymbolic and this is a global + symbol which is defined in an object we are including in the + link (i.e., DEF_REGULAR is set), then we can resolve the + reloc directly. At this point we have not seen all the input + files, so it is possible that DEF_REGULAR is not set now but + will be set later (it is never cleared). In case of a weak + definition, DEF_REGULAR may be cleared later by a strong + definition in a shared library. We account for that + possibility below by storing information in the relocs_copied + field of the hash table entry. A similar situation occurs + when creating shared libraries and symbol visibility changes + render the symbol local. */ + + /* No need to do anything if we're not creating a shared object. */ + if (! info->shared) + break; + + /* We don't need to handle relocs into sections not going into + the "real" output. */ + if ((sec->flags & SEC_ALLOC) == 0) + break; + + /* We may need to create a reloc section in the dynobj and made room + for this reloc. */ + if (sreloc == NULL) + { + sreloc = _bfd_elf_make_dynamic_reloc_section + (sec, dynobj, 2, abfd, /*rela?*/ TRUE); + + if (sreloc == NULL) + return FALSE; + } + + if (sec->flags & SEC_READONLY) + info->flags |= DF_TEXTREL; + + sreloc->size += sizeof (Elf32_External_Rela); + break; case R_CRIS_8_PCREL: case R_CRIS_16_PCREL: @@ -2774,107 +3569,64 @@ cris_elf_check_relocs (abfd, info, sec, relocs) if ((sec->flags & SEC_ALLOC) == 0) break; - /* We can only eliminate PC-relative relocs. */ - if (r_type == R_CRIS_8_PCREL - || r_type == R_CRIS_16_PCREL - || r_type == R_CRIS_32_PCREL) - { - /* If the symbol is local, then we can eliminate the reloc. */ - if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) - break; - - /* If this is with -Bsymbolic and the symbol isn't weak, and - is defined by an ordinary object (the ones we include in - this shared library) then we can also eliminate the - reloc. See comment above for more eliminable cases which - we can't identify at this time. */ - if (info->symbolic - && h->root.type != bfd_link_hash_defweak - && h->def_regular) - break; + /* If the symbol is local, then we know already we can + eliminate the reloc. */ + if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) + break; - if ((sec->flags & SEC_READONLY) != 0) - { - /* FIXME: How do we make this optionally a warning only? */ - (*_bfd_error_handler) - (_("%B, section %A:\n relocation %s should not be used" - " in a shared object; recompile with -fPIC"), - abfd, - sec, - cris_elf_howto_table[r_type].name); - } - } + /* If this is with -Bsymbolic and the symbol isn't weak, and + is defined by an ordinary object (the ones we include in + this shared library) then we can also eliminate the + reloc. See comment above for more eliminable cases which + we can't identify at this time. */ + if (info->symbolic + && h->root.type != bfd_link_hash_defweak + && h->def_regular) + break; - /* We create a reloc section in dynobj and make room for this - reloc. */ + /* We may need to create a reloc section in the dynobj and made room + for this reloc. */ if (sreloc == NULL) { - const char *name; - - name = (bfd_elf_string_from_elf_section - (abfd, - elf_elfheader (abfd)->e_shstrndx, - elf_section_data (sec)->rel_hdr.sh_name)); - if (name == NULL) - return FALSE; + sreloc = _bfd_elf_make_dynamic_reloc_section + (sec, dynobj, 2, abfd, /*rela?*/ TRUE); - BFD_ASSERT (CONST_STRNEQ (name, ".rela") - && strcmp (bfd_get_section_name (abfd, sec), - name + 5) == 0); - - sreloc = bfd_get_section_by_name (dynobj, name); if (sreloc == NULL) - { - sreloc = bfd_make_section_with_flags (dynobj, name, - (SEC_ALLOC - | SEC_LOAD - | SEC_HAS_CONTENTS - | SEC_IN_MEMORY - | SEC_LINKER_CREATED - | SEC_READONLY)); - if (sreloc == NULL - || !bfd_set_section_alignment (dynobj, sreloc, 2)) - return FALSE; - } - if (sec->flags & SEC_READONLY) - info->flags |= DF_TEXTREL; + return FALSE; } sreloc->size += sizeof (Elf32_External_Rela); - /* If we are linking with -Bsymbolic, we count the number of PC - relative relocations we have entered for this symbol, so that - we can discard them again if the symbol is later defined by a - regular object. We know that h is really a pointer to an + /* We count the number of PC relative relocations we have + entered for this symbol, so that we can discard them + again if the symbol is later defined by a regular object. + We know that h is really a pointer to an elf_cris_link_hash_entry. */ - if ((r_type == R_CRIS_8_PCREL - || r_type == R_CRIS_16_PCREL - || r_type == R_CRIS_32_PCREL) - && info->symbolic) - { - struct elf_cris_link_hash_entry *eh; - struct elf_cris_pcrel_relocs_copied *p; + { + struct elf_cris_link_hash_entry *eh; + struct elf_cris_pcrel_relocs_copied *p; - eh = (struct elf_cris_link_hash_entry *) h; + eh = elf_cris_hash_entry (h); - for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) - if (p->section == sreloc) - break; + for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) + if (p->section == sreloc) + break; - if (p == NULL) - { - p = ((struct elf_cris_pcrel_relocs_copied *) - bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); - if (p == NULL) - return FALSE; - p->next = eh->pcrel_relocs_copied; - eh->pcrel_relocs_copied = p; - p->section = sreloc; - p->count = 0; - } + if (p == NULL) + { + p = ((struct elf_cris_pcrel_relocs_copied *) + bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); + if (p == NULL) + return FALSE; + p->next = eh->pcrel_relocs_copied; + eh->pcrel_relocs_copied = p; + p->section = sreloc; + p->count = 0; + p->r_type = r_type; + } - ++p->count; - } + ++p->count; + } break; /* This relocation describes the C++ object vtable hierarchy. @@ -2893,6 +3645,11 @@ cris_elf_check_relocs (abfd, info, sec, relocs) return FALSE; break; + case R_CRIS_16_TPREL: + case R_CRIS_32_TPREL: + /* Already warned above, when necessary. */ + break; + default: /* Other relocs do not appear here. */ bfd_set_error (bfd_error_bad_value); @@ -2983,8 +3740,21 @@ elf_cris_size_dynamic_sections (output_bfd, info) /* Remember whether there is a PLT. */ plt = s->size != 0; } + else if (strcmp (name, ".got.plt") == 0) + { + /* The .got.plt contains the .got header as well as the + actual .got.plt contents. The .got header may contain a + R_CRIS_DTPMOD entry at index 3. */ + s->size += elf_cris_hash_table (info)->dtpmod_refcount != 0 + ? 8 : 0; + } else if (CONST_STRNEQ (name, ".rela")) { + if (strcmp (name, ".rela.got") == 0 + && elf_cris_hash_table (info)->dtpmod_refcount != 0 + && info->shared) + s->size += sizeof (Elf32_External_Rela); + if (s->size != 0) { /* Remember whether there are any reloc sections other @@ -3106,6 +3876,31 @@ elf_cris_discard_excess_dso_dynamics (h, inf) { for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) s->section->size -= s->count * sizeof (Elf32_External_Rela); + + return TRUE; + } + + /* If we have accounted for PC-relative relocs for read-only + sections, now is the time to warn for them. We can't do it in + cris_elf_check_relocs, because we don't know the status of all + symbols at that time (and it's common to force symbols local + late). */ + + for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) + { + BFD_ASSERT ((s->section->flags & SEC_READONLY) != 0); + + /* FIXME: How do we make this optionally a warning only? */ + (*_bfd_error_handler) + (_("%B, section `%A', to symbol `%s':\n" + " relocation %s should not be used" + " in a shared object; recompile with -fPIC"), + s->section->owner, + s->section, + h->root.root.root.string, + cris_elf_howto_table[s->r_type].name); + + info->flags |= DF_TEXTREL; } return TRUE; @@ -3133,7 +3928,7 @@ elf_cris_discard_excess_program_dynamics (h, inf) if (!h->root.def_dynamic || h->root.plt.refcount > 0) { - if (h->root.got.refcount > 0 + if (h->reg_got_refcount > 0 /* The size of this section is only valid and in sync with the various reference counts if we do dynamic; don't decrement it otherwise. */ @@ -3388,7 +4183,8 @@ static enum elf_reloc_type_class elf_cris_reloc_type_class (rela) const Elf_Internal_Rela *rela; { - switch ((int) ELF32_R_TYPE (rela->r_info)) + enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info); + switch (r_type) { case R_CRIS_RELATIVE: return reloc_class_relative; @@ -3400,6 +4196,68 @@ elf_cris_reloc_type_class (rela) return reloc_class_normal; } } + +/* The elf_backend_got_elt_size worker. For one symbol, we can have up to + two GOT entries from three types with two different sizes. We handle + it as a single entry, so we can use the regular offset-calculation + machinery. */ + +static bfd_vma +elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info ATTRIBUTE_UNUSED, + struct elf_link_hash_entry *hr, + bfd *ibfd, + unsigned long symndx) +{ + struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr; + bfd_vma eltsiz = 0; + + /* We may have one regular GOT entry or up to two TLS GOT + entries. */ + if (h == NULL) + { + Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; + bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd); + + BFD_ASSERT (local_got_refcounts != NULL); + + if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0) + { + /* We can't have a variable referred to both as a regular + variable and through TLS relocs. */ + BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0 + && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0); + return 4; + } + + if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0) + eltsiz += 8; + + if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0) + eltsiz += 4; + } + else + { + struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h); + if (hh->reg_got_refcount > 0) + { + /* The actual error-on-input is emitted elsewhere. */ + BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0); + return 4; + } + + if (hh->dtp_refcount > 0) + eltsiz += 8; + + if (hh->tprel_refcount > 0) + eltsiz += 4; + } + + /* We're only called when h->got.refcount is non-zero, so we must + have a non-zero size. */ + BFD_ASSERT (eltsiz != 0); + return eltsiz; +} #define ELF_ARCH bfd_arch_cris #define ELF_MACHINE_CODE EM_CRIS @@ -3438,6 +4296,8 @@ elf_cris_reloc_type_class (rela) elf_cris_link_hash_table_create #define elf_backend_adjust_dynamic_symbol \ elf_cris_adjust_dynamic_symbol +#define elf_backend_copy_indirect_symbol \ + elf_cris_copy_indirect_symbol #define elf_backend_size_dynamic_sections \ elf_cris_size_dynamic_sections #define elf_backend_init_index_section _bfd_elf_init_1_index_section @@ -3456,6 +4316,7 @@ elf_cris_reloc_type_class (rela) #define elf_backend_plt_readonly 1 #define elf_backend_want_plt_sym 0 #define elf_backend_got_header_size 12 +#define elf_backend_got_elt_size elf_cris_got_elt_size /* Later, we my want to optimize RELA entries into REL entries for dynamic linking and libraries (if it's a win of any significance). Until then, |