}
\f
+static CORE_ADDR
+alpha_sigcontext_addr (struct frame_info *fi)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+
+ if (tdep->sigcontext_addr)
+ return (tdep->sigcontext_addr (fi));
+
+ return (0);
+}
+
/* Guaranteed to set frame->saved_regs to some values (it never leaves it
NULL). */
{
CORE_ADDR sigcontext_addr;
- sigcontext_addr = SIGCONTEXT_ADDR (frame);
+ sigcontext_addr = alpha_sigcontext_addr (frame);
+ if (sigcontext_addr == 0)
+ {
+ /* Don't know where the sigcontext is; just bail. */
+ return;
+ }
for (ireg = 0; ireg < 32; ireg++)
{
reg_position = sigcontext_addr + SIGFRAME_REGSAVE_OFF + ireg * 8;
static void
alpha_extract_return_value (struct type *valtype,
- char regbuf[REGISTER_BYTES], char *valbuf)
+ char regbuf[ALPHA_REGISTER_BYTES], char *valbuf)
{
if (TYPE_CODE (valtype) == TYPE_CODE_FLT)
alpha_register_convert_to_virtual (FP0_REGNUM, valtype,
}
\f
-/* This table matches the indices assigned to enum alpha_abi. Keep
- them in sync. */
-static const char * const alpha_abi_names[] =
-{
- "<unknown>",
- "OSF/1",
- "GNU/Linux",
- "FreeBSD",
- "NetBSD",
- NULL
-};
-
-static void
-process_note_abi_tag_sections (bfd *abfd, asection *sect, void *obj)
-{
- enum alpha_abi *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 == 1
- && 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 0 :
- *os_ident_ptr = ALPHA_ABI_LINUX;
- break;
-
- case 1 :
- internal_error
- (__FILE__, __LINE__,
- "process_note_abi_sections: Hurd objects not supported");
- break;
-
- case 2 :
- 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);
- break;
- }
- }
- }
- /* 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 == 1
- && strcmp (note + 12, "NetBSD") == 0)
- /* XXX Should we check the version here?
- Probably not necessary yet. */
- *os_ident_ptr = ALPHA_ABI_NETBSD;
- }
-}
-
-static int
-get_elfosabi (bfd *abfd)
-{
- int elfosabi;
- enum alpha_abi alpha_abi = ALPHA_ABI_UNKNOWN;
-
- elfosabi = elf_elfheader (abfd)->e_ident[EI_OSABI];
-
- /* When elfosabi is 0 (ELFOSABI_NONE), this is supposed to indicate
- what we're on a SYSV system. However, GNU/Linux uses a note section
- to record OS/ABI info, but leaves e_ident[EI_OSABI] zero. So we
- have to check the note sections too. */
- if (elfosabi == 0)
- {
- bfd_map_over_sections (abfd,
- process_note_abi_tag_sections,
- &alpha_abi);
- }
-
- if (alpha_abi != ALPHA_ABI_UNKNOWN)
- return alpha_abi;
-
- switch (elfosabi)
- {
- case ELFOSABI_NONE:
- /* Leave it as unknown. */
- break;
-
- case ELFOSABI_NETBSD:
- return ALPHA_ABI_NETBSD;
-
- case ELFOSABI_FREEBSD:
- return ALPHA_ABI_FREEBSD;
-
- case ELFOSABI_LINUX:
- return ALPHA_ABI_LINUX;
- }
-
- return ALPHA_ABI_UNKNOWN;
-}
-
-struct alpha_abi_handler
-{
- struct alpha_abi_handler *next;
- enum alpha_abi abi;
- void (*init_abi)(struct gdbarch_info, struct gdbarch *);
-};
-
-struct alpha_abi_handler *alpha_abi_handler_list = NULL;
-
-void
-alpha_gdbarch_register_os_abi (enum alpha_abi abi,
- void (*init_abi)(struct gdbarch_info,
- struct gdbarch *))
-{
- struct alpha_abi_handler **handler_p;
-
- for (handler_p = &alpha_abi_handler_list; *handler_p != NULL;
- handler_p = &(*handler_p)->next)
- {
- if ((*handler_p)->abi == abi)
- {
- internal_error
- (__FILE__, __LINE__,
- "alpha_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_abi = init_abi;
- return;
- }
- }
-
- (*handler_p)
- = (struct alpha_abi_handler *) xmalloc (sizeof (struct alpha_abi_handler));
- (*handler_p)->next = NULL;
- (*handler_p)->abi = abi;
- (*handler_p)->init_abi = init_abi;
-}
/* Initialize the current architecture based on INFO. If possible, re-use an
architecture from ARCHES, which is a list of architectures already created
{
struct gdbarch_tdep *tdep;
struct gdbarch *gdbarch;
- enum alpha_abi alpha_abi = ALPHA_ABI_UNKNOWN;
- struct alpha_abi_handler *abi_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))
+ osabi = gdbarch_lookup_osabi (info.abfd);
+ if (osabi == GDB_OSABI_UNKNOWN)
{
- case bfd_target_elf_flavour:
- alpha_abi = get_elfosabi (info.abfd);
- break;
-
- case bfd_target_ecoff_flavour:
- /* Assume it's OSF/1. */
- alpha_abi = ALPHA_ABI_OSF1;
- break;
-
- default:
- /* Not sure what to do here, leave the ABI as unknown. */
- break;
+ /* If it's an ECOFF file, assume it's OSF/1. */
+ if (bfd_get_flavour (info.abfd) == bfd_target_ecoff_flavour)
+ osabi = GDB_OSABI_OSF1;
}
}
{
/* Make sure the ABI selection matches. */
tdep = gdbarch_tdep (arches->gdbarch);
- if (tdep && tdep->alpha_abi == alpha_abi)
+ if (tdep && tdep->osabi == osabi)
return arches->gdbarch;
}
tdep = xmalloc (sizeof (struct gdbarch_tdep));
gdbarch = gdbarch_alloc (&info, tdep);
- tdep->alpha_abi = alpha_abi;
- if (alpha_abi < ALPHA_ABI_INVALID)
- tdep->abi_name = alpha_abi_names[alpha_abi];
- else
- {
- internal_error (__FILE__, __LINE__, "Invalid setting of alpha_abi %d",
- (int) alpha_abi);
- tdep->abi_name = "<invalid>";
- }
+ tdep->osabi = osabi;
/* Lowest text address. This is used by heuristic_proc_start() to
decide when to stop looking. */
tdep->dynamic_sigtramp_offset = NULL;
tdep->skip_sigtramp_frame = NULL;
+ tdep->sigcontext_addr = NULL;
tdep->jb_pc = -1; /* longjmp support not enabled by default */
set_gdbarch_frame_args_skip (gdbarch, 0);
/* Hook in ABI-specific overrides, if they have been registered. */
- if (alpha_abi == ALPHA_ABI_UNKNOWN)
- {
- /* Don't complain about not knowing the ABI variant if we don't
- have an inferior. */
- if (info.abfd)
- fprintf_filtered
- (gdb_stderr, "GDB doesn't recognize the ABI of the inferior. "
- "Attempting to continue with the default Alpha settings");
- }
- else
- {
- for (abi_handler = alpha_abi_handler_list; abi_handler != NULL;
- abi_handler = abi_handler->next)
- if (abi_handler->abi == alpha_abi)
- break;
-
- if (abi_handler)
- abi_handler->init_abi (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 Alpha settings",
- alpha_abi_names[alpha_abi]);
- }
- }
+ gdbarch_init_osabi (info, gdbarch, osabi);
/* Now that we have tuned the configuration, set a few final things
based on what the OS ABI has told us. */
if (tdep == NULL)
return;
- if (tdep->abi_name != NULL)
- fprintf_unfiltered (file, "alpha_dump_tdep: ABI = %s\n", tdep->abi_name);
- else
- internal_error (__FILE__, __LINE__,
- "alpha_dump_tdep: illegal setting of tdep->alpha_abi (%d)",
- (int) tdep->alpha_abi);
+ fprintf_unfiltered (file, "alpha_dump_tdep: OS ABI = %s\n",
+ gdbarch_osabi_name (tdep->osabi));
fprintf_unfiltered (file,
"alpha_dump_tdep: vm_min_address = 0x%lx\n",
projects / deliverable / binutils-gdb.git / blobdiff