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* som.h (struct som_exec_data): New structure to hold exec

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info that must be preserved when running objcopy/strip.
	(struct somdata): Add new "exec_data" field and accessor
	macro.  Add some comments on how the various fields are used.
	(som_section_data_struct): Make is_space and is_subspace bitfields.
	Delete unused subspace_index.  All references now use the
	target_index field within the section structure itself.

	* som.c (make_unique_section): Delete unused declaration.
	(som_bfd_copy_private_bfd_data): New function.
	(som_object_setup): Allocate space for and save exec information
	that needs to be copied during objcopy/strip.
	(som_mkobject): Do not allocate space for a file header here.
	It is not used when only reading SOM objects.
	(som_prep_headers): Allocate space for and attach a file header
	to the output bfd.  For executables, use the saved system_id
	value rather than trying to guess the right value.  Do not abort
	wwhen setting file_hdr->entry* for executables.
	(som_begin_writing): For executables, set the exec_entry and
	exec_flags fields.
	(som_copy_private_backend_section_data): Always return a value.
This commit is contained in:
Jeff Law 1994-03-19 05:06:54 +00:00
parent 08b3c4f997
commit 4359a7ef33
3 changed files with 124 additions and 41 deletions
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22
bfd/ChangeLog
View file

@ -1,5 +1,27 @@
Fri Mar 18 18:13:49 1994 Jeffrey A. Law (law@snake.cs.utah.edu)
* som.h (struct som_exec_data): New structure to hold exec
info that must be preserved when running objcopy/strip.
(struct somdata): Add new "exec_data" field and accessor
macro. Add some comments on how the various fields are used.
(som_section_data_struct): Make is_space and is_subspace bitfields.
Delete unused subspace_index. All references now use the
target_index field within the section structure itself.
* som.c (make_unique_section): Delete unused declaration.
(som_bfd_copy_private_bfd_data): New function.
(som_object_setup): Allocate space for and save exec information
that needs to be copied during objcopy/strip.
(som_mkobject): Do not allocate space for a file header here.
It is not used when only reading SOM objects.
(som_prep_headers): Allocate space for and attach a file header
to the output bfd. For executables, use the saved system_id
value rather than trying to guess the right value. Do not abort
wwhen setting file_hdr->entry* for executables.
(som_begin_writing): For executables, set the exec_entry and
exec_flags fields.
(som_copy_private_backend_section_data): Always return a value.
* libhppa.h (PA_PAGESIZE): Define.
* som.c (SOM_ALIGN): Define.

103
bfd/som.c
View file

@ -133,7 +133,6 @@ static boolean som_mkobject PARAMS ((bfd *));
static bfd_target * som_object_setup PARAMS ((bfd *,
struct header *,
struct som_exec_auxhdr *));
static asection * make_unique_section PARAMS ((bfd *, CONST char *, int));
static boolean setup_sections PARAMS ((bfd *, struct header *));
static bfd_target * som_object_p PARAMS ((bfd *));
static boolean som_write_object_contents PARAMS ((bfd *));
@ -155,6 +154,7 @@ static void som_print_symbol PARAMS ((bfd *, PTR,
static boolean som_new_section_hook PARAMS ((bfd *, asection *));
static boolean som_bfd_copy_private_section_data PARAMS ((bfd *, asection *,
bfd *, asection *));
static boolean som_bfd_copy_private_bfd_data PARAMS ((bfd *, bfd *));
static boolean som_bfd_is_local_label PARAMS ((bfd *, asymbol *));
static boolean som_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
file_ptr, bfd_size_type));
@ -962,7 +962,6 @@ static reloc_howto_type som_hppa_howto_table[] =
{R_RESERVED, 0, 0, 32, false, 0, 0, hppa_som_reloc, "R_RESERVED"},
{R_RESERVED, 0, 0, 32, false, 0, 0, hppa_som_reloc, "R_RESERVED"}};
/* Initialize the SOM relocation queue. By definition the queue holds
the last four multibyte fixups. */
@ -1592,6 +1591,16 @@ som_object_setup (abfd, file_hdrp, aux_hdrp)
obj_som_str_filepos (abfd) = file_hdrp->symbol_strings_location;
obj_som_reloc_filepos (abfd) = file_hdrp->fixup_request_location;
obj_som_exec_data (abfd) = (struct som_exec_data *)
bfd_zalloc (abfd, sizeof (struct som_exec_data ));
if (obj_som_exec_data (abfd) == NULL)
{
bfd_set_error (bfd_error_no_memory);
return NULL;
}
obj_som_exec_data (abfd)->system_id = file_hdrp->system_id;
obj_som_exec_data (abfd)->exec_flags = aux_hdrp->exec_flags;
return abfd->xvec;
}
@ -1717,8 +1726,7 @@ setup_sections (abfd, file_hdr)
subspace.quadrant);
/* Keep an easy mapping between subspaces and sections. */
som_section_data (subspace_asect)->subspace_index
= total_subspaces++;
subspace_asect->target_index = total_subspaces++;
/* Set SEC_READONLY and SEC_CODE/SEC_DATA as specified
by the access_control_bits in the subspace header. */
@ -1907,14 +1915,6 @@ som_mkobject (abfd)
abfd->tdata.som_data = (struct som_data_struct *)
bfd_zalloc (abfd, sizeof (struct som_data_struct));
if (abfd->tdata.som_data == NULL)
{
bfd_set_error (bfd_error_no_memory);
return false;
}
obj_som_file_hdr (abfd)
= (struct header *) bfd_zalloc (abfd, sizeof (struct header));
if (obj_som_file_hdr (abfd) == NULL)
{
bfd_set_error (bfd_error_no_memory);
return false;
@ -1930,12 +1930,25 @@ static boolean
som_prep_headers (abfd)
bfd *abfd;
{
struct header *file_hdr = obj_som_file_hdr (abfd);
struct header *file_hdr;
asection *section;
/* Make and attach a file header to the BFD. */
file_hdr = (struct header *) bfd_zalloc (abfd, sizeof (struct header));
if (file_hdr == NULL)
{
bfd_set_error (bfd_error_no_memory);
return false;
}
obj_som_file_hdr (abfd) = file_hdr;
/* FIXME. This should really be conditional based on whether or not
PA1.1 instructions/registers have been used. */
file_hdr->system_id = CPU_PA_RISC1_0;
if (abfd->flags & EXEC_P)
file_hdr->system_id = obj_som_exec_data (abfd)->system_id;
else
file_hdr->system_id = CPU_PA_RISC1_0;
if (abfd->flags & EXEC_P)
{
@ -1958,15 +1971,9 @@ som_prep_headers (abfd)
file_hdr->file_time.secs = 0;
file_hdr->file_time.nanosecs = 0;
if (abfd->flags & EXEC_P)
abort ();
else
{
file_hdr->entry_space = 0;
file_hdr->entry_subspace = 0;
file_hdr->entry_offset = 0;
}
file_hdr->entry_space = 0;
file_hdr->entry_subspace = 0;
file_hdr->entry_offset = 0;
file_hdr->presumed_dp = 0;
/* Now iterate over the sections translating information from
@ -2905,7 +2912,7 @@ som_begin_writing (abfd)
first_subspace = 0;
}
som_section_data (subsection)->subspace_index = total_subspaces++;
subsection->target_index = total_subspaces++;
/* This is real data to be loaded from the file. */
if (subsection->flags & SEC_LOAD)
{
@ -2968,7 +2975,7 @@ som_begin_writing (abfd)
|| (subsection->flags & SEC_ALLOC) != 0)
continue;
som_section_data (subsection)->subspace_index = total_subspaces++;
subsection->target_index = total_subspaces;
/* This is real data to be loaded from the file. */
if ((subsection->flags & SEC_LOAD) == 0)
{
@ -3021,6 +3028,9 @@ som_begin_writing (abfd)
{
long tmp;
exec_header.exec_entry = bfd_get_start_address (abfd);
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
(saves memory space). */
@ -3331,7 +3341,7 @@ som_bfd_derive_misc_symbol_info (abfd, sym, info)
/* For all other symbols, the symbol_info field contains the
subspace index of the space this symbol is contained in. */
else
info->symbol_info = som_section_data (sym->section)->subspace_index;
info->symbol_info = sym->section->target_index;
/* Set the symbol's value. */
info->symbol_value = sym->value + sym->section->vma;
@ -3495,7 +3505,7 @@ som_section_from_subspace_index (abfd, index)
asection *section;
for (section = abfd->sections; section != NULL; section = section->next)
if (som_section_data (section)->subspace_index == index)
if (section->target_index == index)
return section;
/* Should never happen. */
@ -4148,10 +4158,6 @@ som_new_section_hook (abfd, newsect)
}
newsect->alignment_power = 3;
/* Initialize the subspace_index field to -1 so that it does
not match a subspace with an index of 0. */
som_section_data (newsect)->subspace_index = -1;
/* We allow more than three sections internally */
return true;
}
@ -4177,8 +4183,38 @@ som_bfd_copy_private_section_data (ibfd, isection, obfd, osection)
if (som_section_data (osection)->containing_space)
som_section_data (osection)->containing_space =
som_section_data (osection)->containing_space->output_section;
return true;
}
/* Copy any private info we understand from the input bfd
to the output bfd. */
static boolean
som_bfd_copy_private_bfd_data (ibfd, obfd)
bfd *ibfd, *obfd;
{
/* One day we may try to grok other private data. */
if (ibfd->xvec->flavour != bfd_target_som_flavour
|| obfd->xvec->flavour != bfd_target_som_flavour)
return false;
/* Allocate some memory to hold the data we need. */
obj_som_exec_data (obfd) = (struct som_exec_data *)
bfd_zalloc (obfd, sizeof (struct som_exec_data));
if (obj_som_exec_data (obfd) == NULL)
{
bfd_set_error (bfd_error_no_memory);
return false;
}
/* Now copy the data. */
memcpy (obj_som_exec_data (obfd), obj_som_exec_data (ibfd),
sizeof (struct som_exec_data));
return true;
}
/* Set backend info for sections which can not be described
in the BFD data structures. */
@ -5373,9 +5409,6 @@ som_write_armap (abfd)
#define som_core_file_failing_signal _bfd_dummy_core_file_failing_signal
#define som_core_file_matches_executable_p _bfd_dummy_core_file_matches_executable_p
#define som_bfd_copy_private_bfd_data \
((boolean (*) PARAMS ((bfd *, bfd *))) bfd_true)
bfd_target som_vec =
{
"som", /* name */

40
bfd/som.h
View file

@ -1,5 +1,5 @@
/* HP PA-RISC SOM object file format: definitions internal to BFD.
Copyright (C) 1990-1991 Free Software Foundation, Inc.
Copyright (C) 1990, 91, 92, 93, 94 Free Software Foundation, Inc.
Contributed by the Center for Software Science at the
University of Utah (pa-gdb-bugs@cs.utah.edu).
@ -76,21 +76,49 @@ typedef struct som_symbol
}
som_symbol_type;
/* A structure containing all the magic information stored in a BFD's
private data which needs to be copied during an objcopy/strip run. */
struct som_exec_data
{
/* Sort-of a magic number. BSD uses it to distinguish between
native executables and hpux executables. */
short system_id;
/* Magic exec flags. These control things like whether or not
null pointer dereferencing is allowed and the like. */
long exec_flags;
/* Add more stuff here as needed. Good examples of information
we might want to pass would be presumed_dp, entry_* and maybe
others from the file header. */
};
struct somdata
{
/* All the magic information about an executable which lives
in the private BFD structure and needs to be copied from
the input bfd to the output bfd during a objcopy/strip. */
struct som_exec_data *exec_data;
/* These three fields are only used when writing files and are
generated from scratch. They need not be copied for objcopy
or strip to work. */
struct header *file_hdr;
struct copyright_aux_hdr *copyright_aux_hdr;
struct user_string_aux_hdr *version_aux_hdr;
/* Pointers to a saved copy of the symbol and string tables. These
need not be copied for objcopy or strip to work. */
som_symbol_type *symtab;
char *stringtab;
/* We remember these offsets so that after check_file_format, we have
no dependencies on the particular format of the exec_hdr. */
no dependencies on the particular format of the exec_hdr.
These offsets need not be copied for objcopy or strip to work. */
file_ptr sym_filepos;
file_ptr str_filepos;
file_ptr reloc_filepos;
unsigned stringtab_size;
};
@ -113,17 +141,17 @@ struct som_data_struct
struct som_section_data_struct
{
unsigned int is_space : 1;
unsigned int is_subspace : 1;
unsigned int reloc_size;
char *reloc_stream;
unsigned int subspace_index;
asection *containing_space;
int is_space;
struct space_dictionary_record space_dict;
int is_subspace;
struct subspace_dictionary_record subspace_dict;
};
#define somdata(bfd) ((bfd)->tdata.som_data->a)
#define obj_som_exec_data(bfd) (somdata(bfd).exec_data)
#define obj_som_file_hdr(bfd) (somdata(bfd).file_hdr)
#define obj_som_copyright_hdr(bfd) (somdata(bfd).copyright_aux_hdr)
#define obj_som_version_hdr(bfd) (somdata(bfd).version_aux_hdr)