diff options
Diffstat (limited to 'gdb/sh-tdep.c')
| -rw-r--r-- | gdb/sh-tdep.c | 233 |
1 files changed, 11 insertions, 222 deletions
diff --git a/gdb/sh-tdep.c b/gdb/sh-tdep.c index 55909e2..924b675 100644 --- a/gdb/sh-tdep.c +++ b/gdb/sh-tdep.c @@ -4179,175 +4179,6 @@ sh_linux_svr4_fetch_link_map_offsets (void) #endif /* SVR4_SHARED_LIBS */ -/* This table matches the indices assigned to enum sh_osabi. Keep - them in sync. */ -static const char * const sh_osabi_names[] = -{ - "<unknown>", - "GNU/Linux", - "NetBSD ELF", - NULL -}; - -static void -process_note_abi_tag_sections (bfd *abfd, asection *sect, void *obj) -{ - enum sh_osabi *os_ident_ptr = obj; - const char *name; - unsigned int sectsize; - - name = bfd_get_section_name (abfd, sect); - sectsize = bfd_section_size (abfd, sect); - - if (strcmp (name, ".note.ABI-tag") == 0 && sectsize > 0) - { - unsigned int name_length, data_length, note_type; - char *note; - - /* If the section is larger than this, it's probably not what we are - looking for. */ - if (sectsize > 128) - sectsize = 128; - - note = alloca (sectsize); - - bfd_get_section_contents (abfd, sect, note, - (file_ptr) 0, (bfd_size_type) sectsize); - - name_length = bfd_h_get_32 (abfd, note); - data_length = bfd_h_get_32 (abfd, note + 4); - note_type = bfd_h_get_32 (abfd, note + 8); - - if (name_length == 4 && data_length == 16 && note_type == NT_GNU_ABI_TAG - && strcmp (note + 12, "GNU") == 0) - { - int os_number = bfd_h_get_32 (abfd, note + 16); - - /* The case numbers are from abi-tags in glibc. */ - switch (os_number) - { - case GNU_ABI_TAG_LINUX: - *os_ident_ptr = SH_OSABI_LINUX; - break; - - case GNU_ABI_TAG_HURD: - internal_error - (__FILE__, __LINE__, - "process_note_abi_sections: Hurd objects not supported"); - break; - - case GNU_ABI_TAG_SOLARIS: - internal_error - (__FILE__, __LINE__, - "process_note_abi_sections: Solaris objects not supported"); - break; - - default: - internal_error - (__FILE__, __LINE__, - "process_note_abi_sections: unknown OS number %d", - os_number); - } - } - } - /* NetBSD uses a similar trick. */ - else if (strcmp (name, ".note.netbsd.ident") == 0 && sectsize > 0) - { - unsigned int name_length, desc_length, note_type; - char *note; - - /* If the section is larger than this, it's probably not what we are - looking for. */ - if (sectsize > 128) - sectsize = 128; - - note = alloca (sectsize); - - bfd_get_section_contents (abfd, sect, note, - (file_ptr) 0, (bfd_size_type) sectsize); - - name_length = bfd_h_get_32 (abfd, note); - desc_length = bfd_h_get_32 (abfd, note + 4); - note_type = bfd_h_get_32 (abfd, note + 8); - - if (name_length == 7 && desc_length == 4 && note_type == NT_NETBSD_IDENT - && strcmp (note + 12, "NetBSD") == 0) - /* XXX Should we check the version here? - Probably not necessary yet. */ - *os_ident_ptr = SH_OSABI_NETBSD_ELF; - } -} - -static int -get_elfosabi (bfd *abfd) -{ - int elfosabi; - enum sh_osabi sh_osabi = SH_OSABI_UNKNOWN; - - elfosabi = elf_elfheader (abfd)->e_ident[EI_OSABI]; - - switch (elfosabi) - { - case ELFOSABI_NONE: - /* When elfosabi is 0 (ELFOSABI_NONE), this is supposed to indicate - that we're on a SYSV system. However, some systems use note sections - to record OS/ABI info, but leave e_ident[EI_OSABI] zero. So we - have to check the note sections too. */ - bfd_map_over_sections (abfd, - process_note_abi_tag_sections, - &sh_osabi); - break; - - case ELFOSABI_NETBSD: - sh_osabi = SH_OSABI_NETBSD_ELF; - break; - - case ELFOSABI_LINUX: - sh_osabi = SH_OSABI_LINUX; - break; - } - - return (sh_osabi); -} - -struct sh_osabi_handler -{ - struct sh_osabi_handler *next; - enum sh_osabi abi; - void (*init_osabi)(struct gdbarch_info, struct gdbarch *); -}; - -struct sh_osabi_handler *sh_osabi_handler_list = NULL; - -void -sh_gdbarch_register_os_abi (enum sh_osabi abi, - void (*init_osabi)(struct gdbarch_info, - struct gdbarch *)) -{ - struct sh_osabi_handler **handler_p; - - for (handler_p = &sh_osabi_handler_list; *handler_p != NULL; - handler_p = &(*handler_p)->next) - { - if ((*handler_p)->abi == abi) - { - internal_error - (__FILE__, __LINE__, - "sh_gdbarch_register_os_abi: A handler for this ABI variant " - "(%d) has already been registered", (int) abi); - /* If user wants to continue, override previous definition. */ - (*handler_p)->init_osabi = init_osabi; - return; - } - } - - (*handler_p) - = (struct sh_osabi_handler *) xmalloc (sizeof (struct sh_osabi_handler)); - (*handler_p)->next = NULL; - (*handler_p)->abi = abi; - (*handler_p)->init_osabi = init_osabi; -} - static gdbarch_init_ftype sh_gdbarch_init; static struct gdbarch * @@ -4359,23 +4190,14 @@ sh_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) gdbarch_register_name_ftype *sh_register_name; gdbarch_store_return_value_ftype *sh_store_return_value; gdbarch_register_virtual_type_ftype *sh_register_virtual_type; - enum sh_osabi sh_osabi = SH_OSABI_UNKNOWN; - struct sh_osabi_handler *osabi_handler; + enum gdb_osabi osabi = GDB_OSABI_UNKNOWN; /* Try to determine the ABI of the object we are loading. */ if (info.abfd != NULL) { - switch (bfd_get_flavour (info.abfd)) - { - case bfd_target_elf_flavour: - sh_osabi = get_elfosabi (info.abfd); - break; - - default: - /* Just leave it as "unkown". */ - break; - } + osabi = gdbarch_lookup_osabi (info.abfd); + /* If we get "unknown" back, just leave it that way. */ } /* Find a candidate among the list of pre-declared architectures. */ @@ -4385,7 +4207,7 @@ sh_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) { /* Make sure the ABI selection matches. */ tdep = gdbarch_tdep (arches->gdbarch); - if (tdep && tdep->sh_osabi == sh_osabi) + if (tdep && tdep->osabi == osabi) return arches->gdbarch; } @@ -4394,15 +4216,7 @@ sh_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) tdep = XMALLOC (struct gdbarch_tdep); gdbarch = gdbarch_alloc (&info, tdep); - tdep->sh_osabi = sh_osabi; - if (sh_osabi < SH_OSABI_INVALID) - tdep->osabi_name = sh_osabi_names[sh_osabi]; - else - { - internal_error (__FILE__, __LINE__, "Invalid setting of sh_osabi %d", - (int) sh_osabi); - tdep->osabi_name = "<invalid>"; - } + tdep->osabi = osabi; /* Initialize the register numbers that are not common to all the variants to -1, if necessary thse will be overwritten in the case @@ -4754,32 +4568,11 @@ sh_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown); set_gdbarch_believe_pcc_promotion (gdbarch, 1); - /* Hook in ABI-specific overrides, if they have been registered. If - the ABI is unknown, this is probably an embedded target, so we - should not warn about this situation. */ - if (sh_osabi != SH_OSABI_UNKNOWN) - { - for (osabi_handler = sh_osabi_handler_list; osabi_handler != NULL; - osabi_handler = osabi_handler->next) - if (osabi_handler->abi == sh_osabi) - break; + /* Hook in ABI-specific overrides, if they have been registered. - if (osabi_handler) - osabi_handler->init_osabi (info, gdbarch); - else - { - /* We assume that if GDB_MULTI_ARCH is less than - GDB_MULTI_ARCH_TM that an ABI variant can be supported by - overriding definitions in this file. */ - if (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL) - fprintf_filtered - (gdb_stderr, - "A handler for the ABI variant \"%s\" is not built into this " - "configuration of GDB. " - "Attempting to continue with the default SuperH settings", - sh_osabi_names[sh_osabi]); - } - } + FIXME: if the ABI is unknown, this is probably an embedded target, + so we should not warn about this situation. */ + gdbarch_init_osabi (info, gdbarch, osabi); return gdbarch; } @@ -4792,12 +4585,8 @@ sh_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file) if (tdep == NULL) return; - if (tdep->osabi_name != NULL) - fprintf_unfiltered (file, "sh_dump_tdep: OS ABI = %s\n", tdep->osabi_name); - else - internal_error (__FILE__, __LINE__, - "sh_dump_tdep: illegal setting of tdep->sh_osabi (%d)", - (int) tdep->sh_osabi); + fprintf_unfiltered (file, "sh_dump_tdep: OS ABI = %s\n", + gdbarch_osabi_name (tdep->osabi)); } void |