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32-bit unwind data for ia64-hpux, from Steve Ellcey

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* config/tc-ia64.c (special_section): Add SPECIAL_SECTION_INIT_ARRAY
	and SPECIAL_SECTION_FINI_ARRAY.
	(special_section_name): Add .init_array and .fini_array.
	(md_pseudo_table): Add init_array and fini_array.
	(md): Add pointer_size and pointer_size_shift fields.
	(setup_unwind_header): New static function.
	(output_unw_records): Modify to use setup_unwind_header.
	(generate_unwind_image, dot_endp): Modify to use md.pointer_size and
	md.pointer_size_shift.
	(md_begin): Initialize md.pointer_size and md.pointer_size_shift.
This commit is contained in:
Jim Wilson 2001-07-06 07:32:42 +00:00
parent e135b88994
commit 557debbaef
2 changed files with 86 additions and 33 deletions
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13
gas/ChangeLog
View file

@ -1,3 +1,16 @@
2001-07-05 Steve Ellcey <sje@cup.hp.com>
* config/tc-ia64.c (special_section): Add SPECIAL_SECTION_INIT_ARRAY
and SPECIAL_SECTION_FINI_ARRAY.
(special_section_name): Add .init_array and .fini_array.
(md_pseudo_table): Add init_array and fini_array.
(md): Add pointer_size and pointer_size_shift fields.
(setup_unwind_header): New static function.
(output_unw_records): Modify to use setup_unwind_header.
(generate_unwind_image, dot_endp): Modify to use md.pointer_size and
md.pointer_size_shift.
(md_begin): Initialize md.pointer_size and md.pointer_size_shift.
2001-07-05 Ben Elliston <bje@redhat.com>
* README (Supported platforms): m88k no longer suffers bitrot.

106
gas/config/tc-ia64.c
View file

@ -61,13 +61,17 @@
enum special_section
{
/* IA-64 ABI section pseudo-ops. */
SPECIAL_SECTION_BSS = 0,
SPECIAL_SECTION_SBSS,
SPECIAL_SECTION_SDATA,
SPECIAL_SECTION_RODATA,
SPECIAL_SECTION_COMMENT,
SPECIAL_SECTION_UNWIND,
SPECIAL_SECTION_UNWIND_INFO
SPECIAL_SECTION_UNWIND_INFO,
/* HPUX specific section pseudo-ops. */
SPECIAL_SECTION_INIT_ARRAY,
SPECIAL_SECTION_FINI_ARRAY,
};
enum reloc_func
@ -279,6 +283,9 @@ static struct
int g_reg_set_conditionally[128];
} last_groups[3];
int group_idx;
int pointer_size; /* size in bytes of a pointer */
int pointer_size_shift; /* shift size of a pointer for alignment */
}
md;
@ -523,7 +530,8 @@ static const bfd_vma nop[IA64_NUM_UNITS] =
static char special_section_name[][20] =
{
{".bss"}, {".sbss"}, {".sdata"}, {".rodata"}, {".comment"},
{".IA_64.unwind"}, {".IA_64.unwind_info"}
{".IA_64.unwind"}, {".IA_64.unwind_info"},
{".init_array"}, {".fini_array"}
};
static char *special_linkonce_name[] =
@ -2757,6 +2765,37 @@ fixup_unw_records (list)
}
}
/* Helper routine for output_unw_records. Emits the header for the unwind
info. */
static int
setup_unwind_header(int size, unsigned char **mem)
{
int x, extra = 0;
/* pad to pointer-size boundry. */
x = size % md.pointer_size;
if (x != 0)
extra = md.pointer_size - x;
/* Add 8 for the header + a pointer for the
personality offset. */
*mem = xmalloc (size + extra + 8 + md.pointer_size);
/* Clear the padding area and personality. */
memset (*mem + 8 + size, 0 , extra + md.pointer_size);
/* Initialize the header area. */
md_number_to_chars (*mem, (((bfd_vma) 1 << 48) /* version */
| (unwind.personality_routine
? ((bfd_vma) 3 << 32) /* U & E handler flags */
: 0)
| ((size + extra) / md.pointer_size)), /* length */
8);
return extra;
}
/* Generate an unwind image from a record list. Returns the number of
bytes in the resulting image. The memory image itselof is returned
in the 'ptr' parameter. */
@ -2765,7 +2804,7 @@ output_unw_records (list, ptr)
unw_rec_list *list;
void **ptr;
{
int size, x, extra = 0;
int size, extra;
unsigned char *mem;
*ptr = NULL;
@ -2774,35 +2813,17 @@ output_unw_records (list, ptr)
fixup_unw_records (list);
size = calc_record_size (list);
/* pad to 8 byte boundry. */
x = size % 8;
if (x != 0)
extra = 8 - x;
if (size > 0 || unwind.force_unwind_entry)
{
unwind.force_unwind_entry = 0;
/* Add 8 for the header + 8 more bytes for the personality offset. */
mem = xmalloc (size + extra + 16);
extra = setup_unwind_header(size, &mem);
vbyte_mem_ptr = mem + 8;
/* Clear the padding area and personality. */
memset (mem + 8 + size, 0 , extra + 8);
/* Initialize the header area. */
md_number_to_chars (mem,
(((bfd_vma) 1 << 48) /* version */
| (unwind.personality_routine
? ((bfd_vma) 3 << 32) /* U & E handler flags */
: 0)
| ((size + extra) / 8)), /* length (dwords) */
8);
process_unw_records (list, output_vbyte_mem);
*ptr = mem;
size += extra + 16;
size += extra + 8 + md.pointer_size;
}
return size;
}
@ -3171,9 +3192,9 @@ generate_unwind_image (text_name)
/* Generate the unwind record. */
size = output_unw_records (unwind.list, (void **) &unw_rec);
if (size % 8 != 0)
as_bad ("Unwind record is not a multiple of 8 bytes.");
if (size % md.pointer_size != 0)
as_bad ("Unwind record is not a multiple of %d bytes.", md.pointer_size);
/* If there are unwind records, switch sections, and output the info. */
if (size != 0)
{
@ -3186,9 +3207,10 @@ generate_unwind_image (text_name)
bfd_set_section_flags (stdoutput, now_seg,
SEC_LOAD | SEC_ALLOC | SEC_READONLY);
/* Make sure the section has 8 byte alignment. */
frag_align (3, 0, 0);
record_alignment (now_seg, 3);
/* Make sure the section has 4 byte alignment for ILP32 and
8 byte alignment for LP64. */
frag_align (md.pointer_size_shift, 0, 0);
record_alignment (now_seg, md.pointer_size_shift);
/* Set expression which points to start of unwind descriptor area. */
unwind.info = expr_build_dot ();
@ -3894,11 +3916,14 @@ dot_endp (dummy)
bfd_set_section_flags (stdoutput, now_seg,
SEC_LOAD | SEC_ALLOC | SEC_READONLY);
/* Make sure the section has 8 byte alignment. */
record_alignment (now_seg, 3);
/* Make sure that section has 4 byte alignment for ILP32 and
8 byte alignment for LP64. */
record_alignment (now_seg, md.pointer_size_shift);
ptr = frag_more (24);
where = frag_now_fix () - 24;
/* Need space for 3 pointers for procedure start, procedure end,
and unwind info. */
ptr = frag_more (3 * md.pointer_size);
where = frag_now_fix () - (3 * md.pointer_size);
bytes_per_address = bfd_arch_bits_per_address (stdoutput) / 8;
/* Issue the values of a) Proc Begin, b) Proc End, c) Unwind Record. */
@ -4606,6 +4631,8 @@ const pseudo_typeS md_pseudo_table[] =
{ "comment", dot_special_section, SPECIAL_SECTION_COMMENT },
{ "ia_64.unwind", dot_special_section, SPECIAL_SECTION_UNWIND },
{ "ia_64.unwind_info", dot_special_section, SPECIAL_SECTION_UNWIND_INFO },
{ "init_array", dot_special_section, SPECIAL_SECTION_INIT_ARRAY },
{ "fini_array", dot_special_section, SPECIAL_SECTION_FINI_ARRAY },
{ "proc", dot_proc, 0 },
{ "body", dot_body, 0 },
{ "prologue", dot_prologue, 0 },
@ -6483,6 +6510,19 @@ md_begin ()
if (! ok)
as_warn (_("Could not set architecture and machine"));
/* Set the pointer size and pointer shift size depending on md.flags */
if (md.flags & EF_IA_64_ABI64)
{
md.pointer_size = 8; /* pointers are 8 bytes */
md.pointer_size_shift = 3; /* alignment is 8 bytes = 2^2 */
}
else
{
md.pointer_size = 4; /* pointers are 4 bytes */
md.pointer_size_shift = 2; /* alignment is 4 bytes = 2^2 */
}
md.mem_offset.hint = 0;
md.path = 0;
md.maxpaths = 0;