--- a/bfd/elf32-mips.c +++ b/bfd/elf32-mips.c @@ -1663,6 +1663,15 @@ static const struct ecoff_debug_swap mip #define elf_backend_plt_readonly 1 #define elf_backend_plt_sym_val _bfd_mips_elf_plt_sym_val +/* Most MIPS ELF files do not contain a traditional PLT; only VxWorks + and non-PIC dynamic executables do. These settings only affect + _bfd_elf_create_dynamic_sections, which is only called when we + do want a traditional PLT. */ +#undef elf_backend_want_plt_sym +#define elf_backend_want_plt_sym 1 +#undef elf_backend_plt_readonly +#define elf_backend_plt_readonly 1 + #define elf_backend_discard_info _bfd_mips_elf_discard_info #define elf_backend_ignore_discarded_relocs \ _bfd_mips_elf_ignore_discarded_relocs @@ -1687,6 +1696,8 @@ static const struct ecoff_debug_swap mip #define bfd_elf32_bfd_print_private_bfd_data \ _bfd_mips_elf_print_private_bfd_data +#define elf_backend_plt_sym_val _bfd_mips_elf_plt_sym_val + /* Support for SGI-ish mips targets. */ #define TARGET_LITTLE_SYM bfd_elf32_littlemips_vec #define TARGET_LITTLE_NAME "elf32-littlemips" @@ -1790,6 +1801,7 @@ mips_vxworks_final_write_processing (bfd #undef elf_backend_additional_program_headers #undef elf_backend_modify_segment_map #undef elf_backend_symbol_processing +#undef elf_backend_plt_sym_val /* NOTE: elf_backend_rela_normal is not defined for MIPS. */ #include "elf32-target.h" --- a/bfd/elfxx-mips.c +++ b/bfd/elfxx-mips.c @@ -694,6 +694,11 @@ static bfd *reldyn_sorting_bfd; /* Nonzero if ABFD is using NewABI conventions. */ #define NEWABI_P(abfd) (ABI_N32_P (abfd) || ABI_64_P (abfd)) +/* Nonzero if ABFD is a non-PIC object. */ +#define NON_PIC_P(abfd) \ + (((elf_elfheader (abfd)->e_flags & EF_MIPS_PIC) == 0) \ + && ((elf_elfheader (abfd)->e_flags & EF_MIPS_CPIC) == EF_MIPS_CPIC)) + /* The IRIX compatibility level we are striving for. */ #define IRIX_COMPAT(abfd) \ (get_elf_backend_data (abfd)->elf_backend_mips_irix_compat (abfd)) @@ -706,6 +711,9 @@ static bfd *reldyn_sorting_bfd; #define MIPS_ELF_OPTIONS_SECTION_NAME(abfd) \ (NEWABI_P (abfd) ? ".MIPS.options" : ".options") +/* The name of the section holding non-PIC to PIC call stubs. */ +#define NON_PIC_TO_PIC_STUB_SECTION_NAME ".MIPS.pic_stubs" + /* True if NAME is the recognized name of any SHT_MIPS_OPTIONS section. Some IRIX system files do not use MIPS_ELF_OPTIONS_SECTION_NAME. */ #define MIPS_ELF_OPTIONS_SECTION_NAME_P(NAME) \ @@ -7619,7 +7627,9 @@ _bfd_mips_elf_check_relocs (bfd *abfd, s /* We need a stub, not a plt entry for the undefined function. But we record it as if it needs plt. See - _bfd_elf_adjust_dynamic_symbol. */ + _bfd_elf_adjust_dynamic_symbol. Note that these relocations + are always used for PIC calls, even when using the new + non-PIC ABI. */ h->needs_plt = 1; h->type = STT_FUNC; } @@ -7725,6 +7735,8 @@ _bfd_mips_elf_check_relocs (bfd *abfd, s case R_MIPS_32: case R_MIPS_REL32: case R_MIPS_64: + if (h != NULL) + h->non_got_ref = TRUE; /* In VxWorks executables, references to external symbols are handled using copy relocs or PLT stubs, so there's no need to add a .rela.dyn entry for this relocation. */ @@ -7780,11 +7792,21 @@ _bfd_mips_elf_check_relocs (bfd *abfd, s case R_MIPS_GPREL16: case R_MIPS_LITERAL: case R_MIPS_GPREL32: + if (h != NULL + && (r_type == R_MIPS_GPREL16 || r_type == R_MIPS_GPREL32)) + h->non_got_ref = TRUE; + if (SGI_COMPAT (abfd)) mips_elf_hash_table (info)->compact_rel_size += sizeof (Elf32_External_crinfo); break; + case R_MIPS_HI16: + case R_MIPS_LO16: + if (h != NULL && strcmp (h->root.root.string, "_gp_disp") != 0) + h->non_got_ref = TRUE; + break; + /* This relocation describes the C++ object vtable hierarchy. Reconstruct it for later use during GC. */ case R_MIPS_GNU_VTINHERIT: @@ -7807,20 +7829,20 @@ _bfd_mips_elf_check_relocs (bfd *abfd, s /* We must not create a stub for a symbol that has relocations related to taking the function's address. This doesn't apply to - VxWorks, where CALL relocs refer to a .got.plt entry instead of - a normal .got entry. */ + VxWorks or the non-PIC ABI, where CALL relocs refer to a + .got.plt entry instead of a normal .got entry. */ if (!htab->is_vxworks && h != NULL) switch (r_type) { - default: - ((struct mips_elf_link_hash_entry *) h)->no_fn_stub = TRUE; - break; case R_MIPS16_CALL16: case R_MIPS_CALL16: case R_MIPS_CALL_HI16: case R_MIPS_CALL_LO16: case R_MIPS_JALR: break; + default: + ((struct mips_elf_link_hash_entry *) h)->no_fn_stub = TRUE; + break; } /* See if this reloc would need to refer to a MIPS16 hard-float stub, @@ -12514,7 +12536,9 @@ _bfd_mips_elf_merge_private_bfd_data (bf break; } } - if (null_input_bfd) + /* Dynamic objects normally have no sections, and do not reach + here - but they might if used as DYNOBJ. */ + if (null_input_bfd || (ibfd->flags & DYNAMIC) != 0) return TRUE; ok = TRUE; --- a/bfd/elfxx-mips.h +++ b/bfd/elfxx-mips.h @@ -63,6 +63,9 @@ extern bfd_boolean _bfd_mips_elf_finish_ extern bfd_boolean _bfd_mips_vxworks_finish_dynamic_symbol (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, Elf_Internal_Sym *); +extern bfd_boolean _bfd_mips_nonpic_finish_dynamic_symbol + (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, + Elf_Internal_Sym *); extern bfd_boolean _bfd_mips_elf_finish_dynamic_sections (bfd *, struct bfd_link_info *); extern void _bfd_mips_elf_final_write_processing @@ -153,6 +156,15 @@ extern const struct bfd_elf_special_sect extern bfd_boolean _bfd_mips_elf_common_definition (Elf_Internal_Sym *); +extern bfd_vma _bfd_mips_elf_plt_sym_val + (bfd_vma, const asection *, const arelent *); +extern void _bfd_mips_elf_begin_write_processing + (bfd *abfd, struct bfd_link_info *link_info); +extern bfd_boolean bfd_mips_elf_maybe_create_non_pic_to_pic_stubs_section + (struct bfd_link_info *); +extern void _bfd_mips_post_process_headers + (bfd *abfd, struct bfd_link_info *link_info); + #define elf_backend_common_definition _bfd_mips_elf_common_definition #define elf_backend_name_local_section_symbols \ _bfd_mips_elf_name_local_section_symbols --- a/gas/config/tc-mips.c +++ b/gas/config/tc-mips.c @@ -1891,6 +1891,12 @@ md_begin (void) as_bad (_("-G may not be used in position-independent code")); g_switch_value = 0; } + else if (mips_abicalls) + { + if (g_switch_seen && g_switch_value != 0) + as_bad (_("-G may not be used with abicalls")); + g_switch_value = 0; + } if (! bfd_set_arch_mach (stdoutput, bfd_arch_mips, file_mips_arch)) as_warn (_("Could not set architecture and machine")); @@ -11264,6 +11264,7 @@ OPTION_PDR, OPTION_NO_PDR, OPTION_MVXWORKS_PIC, + OPTION_NON_PIC_ABICALLS, #endif /* OBJ_ELF */ OPTION_END_OF_ENUM }; @@ -11365,6 +11372,7 @@ struct option md_longopts[] = {"mpdr", no_argument, NULL, OPTION_PDR}, {"mno-pdr", no_argument, NULL, OPTION_NO_PDR}, {"mvxworks-pic", no_argument, NULL, OPTION_MVXWORKS_PIC}, + {"mnon-pic-abicalls", no_argument, NULL, OPTION_NON_PIC_ABICALLS}, #endif /* OBJ_ELF */ {NULL, no_argument, NULL, 0} @@ -11783,6 +11791,11 @@ md_parse_option (int c, char *arg) case OPTION_MVXWORKS_PIC: mips_pic = VXWORKS_PIC; break; + + case OPTION_NON_PIC_ABICALLS: + mips_pic = NO_PIC; + mips_abicalls = TRUE; + break; #endif /* OBJ_ELF */ default: