/* bfd back-end for HP PA-RISC SOM objects.
Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- 2000, 2001, 2002
+ 2000, 2001, 2002, 2003, 2004
Free Software Foundation, Inc.
Contributed by the Center for Software Science at the
#include <machine/reg.h>
#include <sys/file.h>
-/* Magic not defined in standard HP-UX header files until 8.0 */
+/* Magic not defined in standard HP-UX header files until 8.0. */
#ifndef CPU_PA_RISC1_0
#define CPU_PA_RISC1_0 0x20B
unsigned int symbol_value;
unsigned int priv_level;
unsigned int secondary_def;
+ unsigned int is_comdat;
+ unsigned int is_common;
+ unsigned int dup_common;
};
-/* Forward declarations */
+/* Forward declarations. */
static bfd_boolean som_mkobject
PARAMS ((bfd *));
asymbol **, bfd_boolean));
static bfd_boolean som_slurp_reloc_table
PARAMS ((bfd *, asection *, asymbol **, bfd_boolean));
-static long som_get_symtab
+static long som_canonicalize_symtab
PARAMS ((bfd *, asymbol **));
static asymbol * som_make_empty_symbol
PARAMS ((bfd *));
PARAMS ((bfd *, asection *, bfd *, asection *));
static bfd_boolean som_bfd_copy_private_bfd_data
PARAMS ((bfd *, bfd *));
+#define som_bfd_copy_private_header_data \
+ _bfd_generic_bfd_copy_private_header_data
#define som_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
#define som_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
static bfd_boolean som_bfd_is_local_label_name
PARAMS ((bfd *, const char *));
static bfd_boolean som_set_section_contents
- PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
+ PARAMS ((bfd *, sec_ptr, const PTR, file_ptr, bfd_size_type));
static bfd_boolean som_get_section_contents
PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
static bfd_boolean som_set_arch_mach
PARAMS ((bfd *, asymbol *, symbol_info *));
static asection * bfd_section_from_som_symbol
PARAMS ((bfd *, struct symbol_dictionary_record *));
-static int log2
+static int exact_log2
PARAMS ((unsigned int));
static bfd_reloc_status_type hppa_som_reloc
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
PARAMS ((unsigned char *, unsigned int, struct reloc_queue *));
static unsigned char * try_prev_fixup
PARAMS ((bfd *, int *, unsigned char *, unsigned int, struct reloc_queue *));
-
static unsigned char * som_reloc_skip
PARAMS ((bfd *, unsigned int, unsigned char *, unsigned int *,
struct reloc_queue *));
PARAMS ((asymbol *));
static bfd_boolean som_bfd_count_ar_symbols
PARAMS ((bfd *, struct lst_header *, symindex *));
-
static bfd_boolean som_bfd_fill_in_ar_symbols
- PARAMS ((bfd *, struct lst_header *, carsym **syms));
+ PARAMS ((bfd *, struct lst_header *, carsym **));
static bfd_boolean som_slurp_armap
PARAMS ((bfd *));
static bfd_boolean som_write_armap
/* R_TRANSLATED */
{ 0, "" }, /* 0xce */
/* R_AUX_UNWIND */
- { 0,"Sd=Vf=Ef=" }, /* 0xcf */
+ { 0,"Sd=Ve=Ee=" }, /* 0xcf */
/* R_COMP1 */
{ 0, "Ob=" }, /* 0xd0 */
/* R_COMP2 */
/* R_LTP_OVERRIDE */
{ 0, "" }, /* 0xdc */
/* R_COMMENT */
- { 0, "Ob=Ve=" }, /* 0xdd */
+ { 0, "Ob=Vf=" }, /* 0xdd */
/* R_RESERVED */
{ 0, "" }, /* 0xde */
{ 0, "" }, /* 0xdf */
return p;
}
-/* Return the logarithm of X, base 2, considering X unsigned.
- Abort -1 if X is not a power or two or is zero. */
+/* Return the logarithm of X, base 2, considering X unsigned,
+ if X is a power of 2. Otherwise, returns -1. */
static int
-log2 (x)
+exact_log2 (x)
unsigned int x;
{
int log = 0;
final_types[3] = NULL;
*final_type = base_type;
break;
+
+ /* FIXME: These two field selectors are not currently supported. */
+ case e_ltpsel:
+ case e_rtpsel:
+ abort ();
}
switch (base_type)
#ifndef NO_PCREL_MODES
/* If we have short and long pcrel modes, then generate the proper
mode selector, then the pcrel relocation. Redundant selectors
- will be eliminted as the relocs are sized and emitted. */
+ will be eliminated as the relocs are sized and emitted. */
bfd_size_type amt = sizeof (int);
final_types[0] = (int *) bfd_alloc (abfd, amt);
if (!final_types[0])
found = 0;
for (section = abfd->sections; section; section = section->next)
{
+ bfd_vma entry;
+
if ((section->flags & SEC_CODE) == 0)
continue;
- if (aux_hdrp->exec_entry >= section->vma
- && aux_hdrp->exec_entry < section->vma + section->_cooked_size)
+ entry = aux_hdrp->exec_entry;
+ if (entry >= section->vma
+ && entry < section->vma + section->_cooked_size)
found = 1;
}
if (aux_hdrp->exec_entry == 0
for (space_index = 0; space_index < file_hdr->space_total; space_index++)
{
struct space_dictionary_record space;
- struct subspace_dictionary_record subspace, save_subspace;
- int subspace_index;
+ struct som_subspace_dictionary_record subspace, save_subspace;
+ unsigned int subspace_index;
asection *space_asect;
char *newname;
record. */
space_asect->vma = subspace.subspace_start;
space_asect->filepos = subspace.file_loc_init_value + current_offset;
- space_asect->alignment_power = log2 (subspace.alignment);
+ space_asect->alignment_power = exact_log2 (subspace.alignment);
if (space_asect->alignment_power == (unsigned) -1)
goto error_return;
/* Initialize save_subspace so we can reliably determine if this
loop placed any useful values into it. */
- memset (&save_subspace, 0, sizeof (struct subspace_dictionary_record));
+ memset (&save_subspace, 0, sizeof (save_subspace));
/* Loop over the rest of the subspaces, building up more sections. */
for (subspace_index = 0; subspace_index < space.subspace_quantity;
if (! bfd_som_set_subsection_attributes (subspace_asect, space_asect,
subspace.access_control_bits,
subspace.sort_key,
- subspace.quadrant))
+ subspace.quadrant,
+ subspace.is_comdat,
+ subspace.is_common,
+ subspace.dup_common))
goto error_return;
/* Keep an easy mapping between subspaces and sections.
break;
}
- if (subspace.dup_common || subspace.is_common)
- subspace_asect->flags |= SEC_IS_COMMON;
- else if (subspace.subspace_length > 0)
+ if (subspace.is_comdat || subspace.is_common || subspace.dup_common)
+ subspace_asect->flags |= SEC_LINK_ONCE;
+
+ if (subspace.subspace_length > 0)
subspace_asect->flags |= SEC_HAS_CONTENTS;
if (subspace.is_loadable)
subspace_asect->_raw_size = subspace.subspace_length;
subspace_asect->filepos = (subspace.file_loc_init_value
+ current_offset);
- subspace_asect->alignment_power = log2 (subspace.alignment);
+ subspace_asect->alignment_power = exact_log2 (subspace.alignment);
if (subspace_asect->alignment_power == (unsigned) -1)
goto error_return;
}
if (abfd->flags & (EXEC_P | DYNAMIC))
{
-
/* Make and attach an exec header to the BFD. */
amt = sizeof (struct som_exec_auxhdr);
obj_som_exec_hdr (abfd) =
else
{
/* Allocate space for the subspace dictionary. */
- amt = sizeof (struct subspace_dictionary_record);
+ amt = sizeof (struct som_subspace_dictionary_record);
som_section_data (section)->subspace_dict =
- (struct subspace_dictionary_record *) bfd_zalloc (abfd, amt);
+ (struct som_subspace_dictionary_record *) bfd_zalloc (abfd, amt);
if (som_section_data (section)->subspace_dict == NULL)
return FALSE;
/* Set subspace attributes. Basic stuff is done here, additional
attributes are filled in later as more information becomes
available. */
- if (section->flags & SEC_IS_COMMON)
- {
- som_section_data (section)->subspace_dict->dup_common = 1;
- som_section_data (section)->subspace_dict->is_common = 1;
- }
-
if (section->flags & SEC_ALLOC)
som_section_data (section)->subspace_dict->is_loadable = 1;
som_section_data (section)->copy_data->access_control_bits;
som_section_data (section)->subspace_dict->quadrant =
som_section_data (section)->copy_data->quadrant;
+ som_section_data (section)->subspace_dict->is_comdat =
+ som_section_data (section)->copy_data->is_comdat;
+ som_section_data (section)->subspace_dict->is_common =
+ som_section_data (section)->copy_data->is_common;
+ som_section_data (section)->subspace_dict->dup_common =
+ som_section_data (section)->copy_data->dup_common;
}
}
return TRUE;
return TRUE;
}
-/* Return TRUE if the given space containins the given subspace. It
+/* Return TRUE if the given space contains the given subspace. It
is safe to assume space really is a space, and subspace really
is a subspace. */
int reloc_offset;
unsigned int current_rounding_mode;
#ifndef NO_PCREL_MODES
- int current_call_mode;
+ unsigned int current_call_mode;
#endif
/* Find a subspace of this space. */
continue;
/* If this subspace does not have real data, then we are
- finised with it. */
+ finished with it. */
if ((subsection->flags & SEC_HAS_CONTENTS) == 0)
{
som_section_data (subsection)->subspace_dict->fixup_request_index
/* This gets a bit gruesome because of the compilation unit. The
strings within the compilation unit are part of the symbol
strings, but don't have symbol_dictionary entries. So, manually
- write them and update the compliation unit header. On input, the
+ write them and update the compilation unit header. On input, the
compilation unit header contains local copies of the strings.
Move them aside. */
if (compilation_unit)
num_subspaces = som_count_subspaces (abfd);
obj_som_file_hdr (abfd)->subspace_location = current_offset;
obj_som_file_hdr (abfd)->subspace_total = num_subspaces;
- current_offset += num_subspaces * sizeof (struct subspace_dictionary_record);
+ current_offset
+ += num_subspaces * sizeof (struct som_subspace_dictionary_record);
/* Next is the string table for the space/subspace names. We will
build and write the string table on the fly. At the same time
som_section_data (subsection)->subspace_dict->space_index = i;
/* Dump the current subspace header. */
- amt = sizeof (struct subspace_dictionary_record);
+ amt = sizeof (struct som_subspace_dictionary_record);
if (bfd_bwrite ((PTR) som_section_data (subsection)->subspace_dict,
amt, abfd) != amt)
return FALSE;
som_section_data (subsection)->subspace_dict->space_index = i;
/* Dump this subspace header. */
- amt = sizeof (struct subspace_dictionary_record);
+ amt = sizeof (struct som_subspace_dictionary_record);
if (bfd_bwrite ((PTR) som_section_data (subsection)->subspace_dict,
amt, abfd) != amt)
return FALSE;
section = section->next;
}
- /* All the subspace dictiondary records are written, and all the
+ /* All the subspace dictionary records are written, and all the
fields are set up in the space dictionary records.
Seek to the right location and start writing the space
exec_header->exec_flags = obj_som_exec_data (abfd)->exec_flags;
/* Oh joys. Ram some of the BSS data into the DATA section
- to be compatable with how the hp linker makes objects
+ to be compatible with how the hp linker makes objects
(saves memory space). */
tmp = exec_header->exec_dsize;
tmp = SOM_ALIGN (tmp, PA_PAGESIZE);
info->symbol_type = ST_DATA;
else
{
- /* Common symbols must have scope SS_UNSAT and type
- ST_STORAGE or the linker will choke. */
+ /* For BFD style common, the linker will choke unless we set the
+ type and scope to ST_STORAGE and SS_UNSAT, respectively. */
if (bfd_is_com_section (sym->section))
{
- info->symbol_scope = SS_UNSAT;
info->symbol_type = ST_STORAGE;
+ info->symbol_scope = SS_UNSAT;
}
/* It is possible to have a symbol without an associated
info->symbol_type = ST_DATA;
}
- else if (som_symbol_data (sym)->som_type == SYMBOL_TYPE_UNKNOWN)
- info->symbol_type = ST_DATA;
-
/* From now on it's a very simple mapping. */
else if (som_symbol_data (sym)->som_type == SYMBOL_TYPE_ABSOLUTE)
info->symbol_type = ST_ABSOLUTE;
/* Now handle the symbol's scope. Exported data which is not
in the common section has scope SS_UNIVERSAL. Note scope
of common symbols was handled earlier! */
- if (bfd_is_und_section (sym->section))
+ if (bfd_is_com_section (sym->section))
+ ;
+ else if (bfd_is_und_section (sym->section))
info->symbol_scope = SS_UNSAT;
- else if (sym->flags & (BSF_EXPORT | BSF_WEAK)
- && ! bfd_is_com_section (sym->section))
+ else if (sym->flags & (BSF_EXPORT | BSF_WEAK))
info->symbol_scope = SS_UNIVERSAL;
/* Anything else which is not in the common section has scope
SS_LOCAL. */
- else if (! bfd_is_com_section (sym->section))
+ else
info->symbol_scope = SS_LOCAL;
/* Now set the symbol_info field. It has no real meaning
/* Set the symbol's value. */
info->symbol_value = sym->value + sym->section->vma;
- /* The secondary_def field is for weak symbols. */
+ /* The secondary_def field is for "weak" symbols. */
if (sym->flags & BSF_WEAK)
info->secondary_def = TRUE;
else
info->secondary_def = FALSE;
+ /* The is_comdat, is_common and dup_common fields provide various
+ flavors of common.
+
+ For data symbols, setting IS_COMMON provides Fortran style common
+ (duplicate definitions and overlapped initialization). Setting both
+ IS_COMMON and DUP_COMMON provides Cobol style common (duplicate
+ definitions as long as they are all the same length). In a shared
+ link data symbols retain their IS_COMMON and DUP_COMMON flags.
+ An IS_COMDAT data symbol is similar to a IS_COMMON | DUP_COMMON
+ symbol except in that it loses its IS_COMDAT flag in a shared link.
+
+ For code symbols, IS_COMDAT and DUP_COMMON have effect. Universal
+ DUP_COMMON code symbols are not exported from shared libraries.
+ IS_COMDAT symbols are exported but they lose their IS_COMDAT flag.
+
+ We take a simplified approach to setting the is_comdat, is_common
+ and dup_common flags in symbols based on the flag settings of their
+ subspace. This avoids having to add directives like `.comdat' but
+ the linker behavior is probably undefined if there is more than one
+ universal symbol (comdat key sysmbol) in a subspace.
+
+ The behavior of these flags is not well documentmented, so there
+ may be bugs and some surprising interactions with other flags. */
+ if (som_section_data (sym->section)
+ && som_section_data (sym->section)->subspace_dict
+ && info->symbol_scope == SS_UNIVERSAL
+ && (info->symbol_type == ST_ENTRY
+ || info->symbol_type == ST_CODE
+ || info->symbol_type == ST_DATA))
+ {
+ info->is_comdat
+ = som_section_data (sym->section)->subspace_dict->is_comdat;
+ info->is_common
+ = som_section_data (sym->section)->subspace_dict->is_common;
+ info->dup_common
+ = som_section_data (sym->section)->subspace_dict->dup_common;
+ }
}
/* Build and write, in one big chunk, the entire symbol table for
som_symtab[i].xleast = 3;
som_symtab[i].symbol_value = info.symbol_value | info.priv_level;
som_symtab[i].secondary_def = info.secondary_def;
+ som_symtab[i].is_comdat = info.is_comdat;
+ som_symtab[i].is_common = info.is_common;
+ som_symtab[i].dup_common = info.dup_common;
}
/* Everything is ready, seek to the right location and
&& symbol->symbol_type != ST_SEC_PROG
&& symbol->symbol_type != ST_MILLICODE))
{
- unsigned int index = symbol->symbol_info;
+ int index = symbol->symbol_info;
for (section = abfd->sections; section != NULL; section = section->next)
if (section->target_index == index && som_is_subspace (section))
return section;
in the symbol table. */
static long
-som_get_symtab (abfd, location)
+som_canonicalize_symtab (abfd, location)
bfd *abfd;
asymbol **location;
{
bfd_boolean
bfd_som_set_subsection_attributes (section, container, access,
- sort_key, quadrant)
+ sort_key, quadrant, comdat,
+ common, dup_common)
asection *section;
asection *container;
int access;
unsigned int sort_key;
- int quadrant;
+ int quadrant, comdat, common, dup_common;
{
/* Allocate memory to hold the magic information. */
if (som_section_data (section)->copy_data == NULL)
som_section_data (section)->copy_data->access_control_bits = access;
som_section_data (section)->copy_data->quadrant = quadrant;
som_section_data (section)->copy_data->container = container;
+ som_section_data (section)->copy_data->is_comdat = comdat;
+ som_section_data (section)->copy_data->is_common = common;
+ som_section_data (section)->copy_data->dup_common = dup_common;
return TRUE;
}
if ((bfd_size_type) (offset+count) > section->_raw_size
|| bfd_seek (abfd, (file_ptr) (section->filepos + offset), SEEK_SET) != 0
|| bfd_bread (location, count, abfd) != count)
- return FALSE; /* on error */
+ return FALSE; /* On error. */
return TRUE;
}
som_set_section_contents (abfd, section, location, offset, count)
bfd *abfd;
sec_ptr section;
- PTR location;
+ const PTR location;
file_ptr offset;
bfd_size_type count;
{
if (bfd_seek (abfd, offset, SEEK_SET) != 0)
return FALSE;
- if (bfd_bwrite ((PTR) location, count, abfd) != count)
+ if (bfd_bwrite (location, count, abfd) != count)
return FALSE;
return TRUE;
}
+ sizeof (struct lst_header)), SEEK_SET) != 0)
return FALSE;
- /* Initializae the cache and allocate space for the library symbols. */
+ /* Initialize the cache and allocate space for the library symbols. */
ardata->cache = 0;
amt = ardata->symdef_count;
amt *= sizeof (carsym);
curr_lst_sym->initially_frozen = 0;
curr_lst_sym->memory_resident = 0;
curr_lst_sym->is_common = bfd_is_com_section (sym->symbol.section);
- curr_lst_sym->dup_common = 0;
+ curr_lst_sym->dup_common = info.dup_common;
curr_lst_sym->xleast = 3;
curr_lst_sym->arg_reloc = info.arg_reloc;
curr_lst_sym->name.n_strx = p - strings + 4;
#define som_bfd_gc_sections bfd_generic_gc_sections
#define som_bfd_merge_sections bfd_generic_merge_sections
+#define som_bfd_is_group_section bfd_generic_is_group_section
#define som_bfd_discard_group bfd_generic_discard_group
const bfd_target som_vec = {
(HAS_RELOC | EXEC_P | /* object flags */
HAS_LINENO | HAS_DEBUG |
HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED | DYNAMIC),
- (SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS
+ (SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS | SEC_LINK_ONCE
| SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
/* leading_symbol_char: is the first char of a user symbol
- predictable, and if so what is it */
+ predictable, and if so what is it. */
0,
'/', /* ar_pad_char */
14, /* ar_max_namelen */
projects / deliverable / binutils-gdb.git / blobdiff