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Nios II large-GOT relocations 

2014-02-03  Sandra Loosemore  <sandra@codesourcery.com>

	include/elf/
	* nios2.h (R_NIOS2_GOT_LO, R_NIOS2_GOT_HA): New.
	(R_NIOS2_CALL_LO, R_NIOS2_CALL_HA): New.
	(R_NIOS2_ILLEGAL): Adjust.

	gas/
	* config/tc-nios2.c (md_apply_fix): Test for new relocs.
	(nios2_special_reloc): Add %call_lo, %call_hiadj, %got_lo,
	%got_hiadj relocation operators.  Sort table and add comment
	to explain ordering.
	(nios2_fix_adjustable): Test for new relocs.
	* doc/c-nios2.texi (Nios II Relocations): Document new relocation
	operators.

	bfd/
	* reloc.c (BFD_RELOC_NIOS2_GOT_LO, BFD_RELOC_NIOS2_GOT_HA): New.
	(BFD_RELOC_NIOS2_CALL_LO, BFD_RELOC_NIOS2_CALL_HA): New.
	* libbfd.h: Regenerated.
	* bfd-in2.h: Regenerated.
	* elf32-nios2.c (elf_nios2_howto_table_rel): Add new relocations.
	(nios2_reloc_map): Likewise.
	(GOT_USED, CALL_USED): Renamed from GOT16_USED and CALL16_USED.
	Fixed all references.
	(nios2_elf32_relocate_section): Add new relocations.
	(nios2_elf32_check_relocs): Likewise.
	(nios2_elf32_gc_sweep_hook): Likewise.
This commit is contained in:
Sandra Loosemore 2014-02-03 08:42:42 -08:00
parent af09351e0f
commit 1c2de46353
10 changed files with 192 additions and 18 deletions
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14
bfd/ChangeLog
View File

@ -1,3 +1,17 @@
2014-02-03 Sandra Loosemore <sandra@codesourcery.com>
* reloc.c (BFD_RELOC_NIOS2_GOT_LO, BFD_RELOC_NIOS2_GOT_HA): New.
(BFD_RELOC_NIOS2_CALL_LO, BFD_RELOC_NIOS2_CALL_HA): New.
* libbfd.h: Regenerated.
* bfd-in2.h: Regenerated.
* elf32-nios2.c (elf_nios2_howto_table_rel): Add new relocations.
(nios2_reloc_map): Likewise.
(GOT_USED, CALL_USED): Renamed from GOT16_USED and CALL16_USED.
Fixed all references.
(nios2_elf32_relocate_section): Add new relocations.
(nios2_elf32_check_relocs): Likewise.
(nios2_elf32_gc_sweep_hook): Likewise.
2014-02-03 Alan Modra <amodra@gmail.com>
* elf32-ppc.c (struct ppc_elf_link_hash_table): Add params.

4
bfd/bfd-in2.h
View File

@ -5227,6 +5227,10 @@ a matching LO8XG part. */
BFD_RELOC_NIOS2_RELATIVE,
BFD_RELOC_NIOS2_GOTOFF,
BFD_RELOC_NIOS2_CALL26_NOAT,
BFD_RELOC_NIOS2_GOT_LO,
BFD_RELOC_NIOS2_GOT_HA,
BFD_RELOC_NIOS2_CALL_LO,
BFD_RELOC_NIOS2_CALL_HA,
/* IQ2000 Relocations. */
BFD_RELOC_IQ2000_OFFSET_16,

126
bfd/elf32-nios2.c
View File

@ -670,6 +670,62 @@ static reloc_howto_type elf_nios2_howto_table_rel[] = {
0xffffffc0, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_NIOS2_GOT_LO,
0,
2,
16,
FALSE,
6,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_NIOS2_GOT_LO",
FALSE,
0x003fffc0,
0x003fffc0,
FALSE),
HOWTO (R_NIOS2_GOT_HA,
0,
2,
16,
FALSE,
6,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_NIOS2_GOT_HA",
FALSE,
0x003fffc0,
0x003fffc0,
FALSE),
HOWTO (R_NIOS2_CALL_LO,
0,
2,
16,
FALSE,
6,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_NIOS2_CALL_LO",
FALSE,
0x003fffc0,
0x003fffc0,
FALSE),
HOWTO (R_NIOS2_CALL_HA,
0,
2,
16,
FALSE,
6,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_NIOS2_CALL_HA",
FALSE,
0x003fffc0,
0x003fffc0,
FALSE),
/* Add other relocations here. */
};
@ -749,6 +805,10 @@ static const struct elf_reloc_map nios2_reloc_map[] = {
{BFD_RELOC_NIOS2_RELATIVE, R_NIOS2_RELATIVE},
{BFD_RELOC_NIOS2_GOTOFF, R_NIOS2_GOTOFF},
{BFD_RELOC_NIOS2_CALL26_NOAT, R_NIOS2_CALL26_NOAT},
{BFD_RELOC_NIOS2_GOT_LO, R_NIOS2_GOT_LO},
{BFD_RELOC_NIOS2_GOT_HA, R_NIOS2_GOT_HA},
{BFD_RELOC_NIOS2_CALL_LO, R_NIOS2_CALL_LO},
{BFD_RELOC_NIOS2_CALL_HA, R_NIOS2_CALL_HA},
};
enum elf32_nios2_stub_type
@ -839,10 +899,11 @@ struct elf32_nios2_link_hash_entry
a dynamic GOT reloc in shared objects, only a dynamic PLT reloc. Lazy
linking will not work if the dynamic GOT reloc exists.
To check for this condition efficiently, we compare got_types_used against
CALL16_USED, meaning
(got_types_used & (GOT16_USED | CALL16_USED)) == CALL16_USED. */
#define GOT16_USED 1
#define CALL16_USED 2
CALL_USED, meaning
(got_types_used & (GOT_USED | CALL_USED)) == CALL_USED.
*/
#define GOT_USED 1
#define CALL_USED 2
unsigned char got_types_used;
};
@ -2942,6 +3003,10 @@ nios2_elf32_relocate_section (bfd *output_bfd,
case R_NIOS2_GOT16:
case R_NIOS2_CALL16:
case R_NIOS2_GOT_LO:
case R_NIOS2_GOT_HA:
case R_NIOS2_CALL_LO:
case R_NIOS2_CALL_HA:
/* Relocation is to the entry for this symbol in the
global offset table. */
if (sgot == NULL)
@ -2957,7 +3022,7 @@ nios2_elf32_relocate_section (bfd *output_bfd,
bfd_boolean dyn;
eh = (struct elf32_nios2_link_hash_entry *)h;
use_plt = (eh->got_types_used == CALL16_USED
use_plt = (eh->got_types_used == CALL_USED
&& h->plt.offset != (bfd_vma) -1);
off = h->got.offset;
@ -3044,9 +3109,30 @@ nios2_elf32_relocate_section (bfd *output_bfd,
/* This relocation does not use the addend. */
rel->r_addend = 0;
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset,
relocation, rel->r_addend);
switch (howto->type)
{
case R_NIOS2_GOT_LO:
case R_NIOS2_CALL_LO:
r = nios2_elf32_do_lo16_relocate (input_bfd, howto,
input_section, contents,
rel->r_offset, relocation,
rel->r_addend);
break;
case R_NIOS2_GOT_HA:
case R_NIOS2_CALL_HA:
r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto,
input_section, contents,
rel->r_offset,
relocation,
rel->r_addend);
break;
default:
r = _bfd_final_link_relocate (howto, input_bfd,
input_section, contents,
rel->r_offset, relocation,
rel->r_addend);
break;
}
break;
case R_NIOS2_GOTOFF_LO:
@ -3671,7 +3757,11 @@ nios2_elf32_check_relocs (bfd *abfd, struct bfd_link_info *info,
switch (r_type)
{
case R_NIOS2_GOT16:
case R_NIOS2_GOT_LO:
case R_NIOS2_GOT_HA:
case R_NIOS2_CALL16:
case R_NIOS2_CALL_LO:
case R_NIOS2_CALL_HA:
case R_NIOS2_TLS_GD16:
case R_NIOS2_TLS_IE16:
/* This symbol requires a global offset table entry. */
@ -3682,7 +3772,11 @@ nios2_elf32_check_relocs (bfd *abfd, struct bfd_link_info *info,
{
default:
case R_NIOS2_GOT16:
case R_NIOS2_GOT_LO:
case R_NIOS2_GOT_HA:
case R_NIOS2_CALL16:
case R_NIOS2_CALL_LO:
case R_NIOS2_CALL_HA:
tls_type = GOT_NORMAL;
break;
case R_NIOS2_TLS_GD16:
@ -3719,7 +3813,9 @@ nios2_elf32_check_relocs (bfd *abfd, struct bfd_link_info *info,
= (struct elf32_nios2_link_hash_entry *)h;
h->got.refcount++;
old_tls_type = elf32_nios2_hash_entry(h)->tls_type;
if (r_type == R_NIOS2_CALL16)
if (r_type == R_NIOS2_CALL16
|| r_type == R_NIOS2_CALL_LO
|| r_type == R_NIOS2_CALL_HA)
{
/* Make sure a plt entry is created for this symbol if
it turns out to be a function defined by a dynamic
@ -3727,10 +3823,10 @@ nios2_elf32_check_relocs (bfd *abfd, struct bfd_link_info *info,
h->plt.refcount++;
h->needs_plt = 1;
h->type = STT_FUNC;
eh->got_types_used |= CALL16_USED;
eh->got_types_used |= CALL_USED;
}
else
eh->got_types_used |= GOT16_USED;
eh->got_types_used |= GOT_USED;
}
else
{
@ -3964,7 +4060,11 @@ nios2_elf32_gc_sweep_hook (bfd *abfd,
switch (r_type)
{
case R_NIOS2_GOT16:
case R_NIOS2_GOT_LO:
case R_NIOS2_GOT_HA:
case R_NIOS2_CALL16:
case R_NIOS2_CALL_LO:
case R_NIOS2_CALL_HA:
if (h != NULL)
{
if (h->got.refcount > 0)
@ -4114,7 +4214,7 @@ nios2_elf32_finish_dynamic_symbol (bfd *output_bfd,
}
}
use_plt = (eh->got_types_used == CALL16_USED
use_plt = (eh->got_types_used == CALL_USED
&& h->plt.offset != (bfd_vma) -1);
if (!use_plt && h->got.offset != (bfd_vma) -1
@ -4587,7 +4687,7 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
}
eh = (struct elf32_nios2_link_hash_entry *) h;
use_plt = (eh->got_types_used == CALL16_USED
use_plt = (eh->got_types_used == CALL_USED
&& h->plt.offset != (bfd_vma) -1);
if (h->got.refcount > 0)

4
bfd/libbfd.h
View File

@ -2533,6 +2533,10 @@ static const char *const bfd_reloc_code_real_names[] = { "@@uninitialized@@",
"BFD_RELOC_NIOS2_RELATIVE",
"BFD_RELOC_NIOS2_GOTOFF",
"BFD_RELOC_NIOS2_CALL26_NOAT",
"BFD_RELOC_NIOS2_GOT_LO",
"BFD_RELOC_NIOS2_GOT_HA",
"BFD_RELOC_NIOS2_CALL_LO",
"BFD_RELOC_NIOS2_CALL_HA",
"BFD_RELOC_IQ2000_OFFSET_16",
"BFD_RELOC_IQ2000_OFFSET_21",
"BFD_RELOC_IQ2000_UHI16",

8
bfd/reloc.c
View File

@ -6067,6 +6067,14 @@ ENUMX
BFD_RELOC_NIOS2_GOTOFF
ENUMX
BFD_RELOC_NIOS2_CALL26_NOAT
ENUMX
BFD_RELOC_NIOS2_GOT_LO
ENUMX
BFD_RELOC_NIOS2_GOT_HA
ENUMX
BFD_RELOC_NIOS2_CALL_LO
ENUMX
BFD_RELOC_NIOS2_CALL_HA
ENUMDOC
Relocations used by the Altera Nios II core.

10
gas/ChangeLog
View File

@ -1,3 +1,13 @@
2014-02-03 Sandra Loosemore <sandra@codesourcery.com>
* config/tc-nios2.c (md_apply_fix): Test for new relocs.
(nios2_special_reloc): Add %call_lo, %call_hiadj, %got_lo,
%got_hiadj relocation operators. Sort table and add comment
to explain ordering.
(nios2_fix_adjustable): Test for new relocs.
* doc/c-nios2.texi (Nios II Relocations): Document new relocation
operators.
2014-01-30 Sandra Loosemore <sandra@codesourcery.com>
* config/tc-nios2.c (md_apply_fix): Handle BFD_RELOC_NIOS2_CALL26_NOAT.

24
gas/config/tc-nios2.c
View File

@ -1139,7 +1139,6 @@ md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
|| fixP->fx_r_type == BFD_RELOC_NIOS2_U16
|| fixP->fx_r_type == BFD_RELOC_16_PCREL
|| fixP->fx_r_type == BFD_RELOC_NIOS2_CALL26
|| fixP->fx_r_type == BFD_RELOC_NIOS2_CALL26_NOAT
|| fixP->fx_r_type == BFD_RELOC_NIOS2_IMM5
|| fixP->fx_r_type == BFD_RELOC_NIOS2_CACHE_OPX
|| fixP->fx_r_type == BFD_RELOC_NIOS2_IMM6
@ -1165,6 +1164,11 @@ md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
|| fixP->fx_r_type == BFD_RELOC_NIOS2_TLS_LE16
|| fixP->fx_r_type == BFD_RELOC_NIOS2_GOTOFF
|| fixP->fx_r_type == BFD_RELOC_NIOS2_TLS_DTPREL
|| fixP->fx_r_type == BFD_RELOC_NIOS2_CALL26_NOAT
|| fixP->fx_r_type == BFD_RELOC_NIOS2_GOT_LO
|| fixP->fx_r_type == BFD_RELOC_NIOS2_GOT_HA
|| fixP->fx_r_type == BFD_RELOC_NIOS2_CALL_LO
|| fixP->fx_r_type == BFD_RELOC_NIOS2_CALL_HA
/* Add other relocs here as we generate them. */
));
@ -1301,21 +1305,28 @@ struct nios2_special_relocS
bfd_reloc_code_real_type reloc_type;
};
/* This table is sorted so that prefix strings are listed after the longer
strings that include them -- e.g., %got after %got_hiadj, etc. */
struct nios2_special_relocS nios2_special_reloc[] = {
{"%hiadj", BFD_RELOC_NIOS2_HIADJ16},
{"%hi", BFD_RELOC_NIOS2_HI16},
{"%lo", BFD_RELOC_NIOS2_LO16},
{"%gprel", BFD_RELOC_NIOS2_GPREL},
{"%call_lo", BFD_RELOC_NIOS2_CALL_LO},
{"%call_hiadj", BFD_RELOC_NIOS2_CALL_HA},
{"%call", BFD_RELOC_NIOS2_CALL16},
{"%gotoff_lo", BFD_RELOC_NIOS2_GOTOFF_LO},
{"%gotoff_hiadj", BFD_RELOC_NIOS2_GOTOFF_HA},
{"%gotoff", BFD_RELOC_NIOS2_GOTOFF},
{"%got_hiadj", BFD_RELOC_NIOS2_GOT_HA},
{"%got_lo", BFD_RELOC_NIOS2_GOT_LO},
{"%got", BFD_RELOC_NIOS2_GOT16},
{"%tls_gd", BFD_RELOC_NIOS2_TLS_GD16},
{"%tls_ldm", BFD_RELOC_NIOS2_TLS_LDM16},
{"%tls_ldo", BFD_RELOC_NIOS2_TLS_LDO16},
{"%tls_ie", BFD_RELOC_NIOS2_TLS_IE16},
{"%tls_le", BFD_RELOC_NIOS2_TLS_LE16},
{"%gotoff", BFD_RELOC_NIOS2_GOTOFF},
{"%got", BFD_RELOC_NIOS2_GOT16}
};
#define NIOS2_NUM_SPECIAL_RELOCS \
@ -2824,7 +2835,12 @@ nios2_fix_adjustable (fixS *fixp)
|| fixp->fx_r_type == BFD_RELOC_NIOS2_TLS_DTPMOD
|| fixp->fx_r_type == BFD_RELOC_NIOS2_TLS_DTPREL
|| fixp->fx_r_type == BFD_RELOC_NIOS2_TLS_TPREL
|| fixp->fx_r_type == BFD_RELOC_NIOS2_GOTOFF)
|| fixp->fx_r_type == BFD_RELOC_NIOS2_GOTOFF
|| fixp->fx_r_type == BFD_RELOC_NIOS2_GOT_LO
|| fixp->fx_r_type == BFD_RELOC_NIOS2_GOT_HA
|| fixp->fx_r_type == BFD_RELOC_NIOS2_CALL_LO
|| fixp->fx_r_type == BFD_RELOC_NIOS2_CALL_HA
)
return 0;
return 1;

8
gas/doc/c-nios2.texi
View File

@ -131,7 +131,11 @@ fastint:
@end smallexample
@cindex @code{call} directive, Nios II
@cindex @code{call_lo} directive, Nios II
@cindex @code{call_hiadj} directive, Nios II
@cindex @code{got} directive, Nios II
@cindex @code{got_lo} directive, Nios II
@cindex @code{got_hiadj} directive, Nios II
@cindex @code{gotoff} directive, Nios II
@cindex @code{gotoff_lo} directive, Nios II
@cindex @code{gotoff_hiadj} directive, Nios II
@ -141,7 +145,11 @@ fastint:
@cindex @code{tls_ldm} directive, Nios II
@cindex @code{tls_ldo} directive, Nios II
@item %call(@var{expression})
@item %call_lo(@var{expression})
@item %call_hiadj(@var{expression})
@itemx %got(@var{expression})
@itemx %got_lo(@var{expression})
@itemx %got_hiadj(@var{expression})
@itemx %gotoff(@var{expression})
@itemx %gotoff_lo(@var{expression})
@itemx %gotoff_hiadj(@var{expression})

6
include/elf/ChangeLog
View File

@ -1,3 +1,9 @@
2014-02-03 Sandra Loosemore <sandra@codesourcery.com>
* nios2.h (R_NIOS2_GOT_LO, R_NIOS2_GOT_HA): New.
(R_NIOS2_CALL_LO, R_NIOS2_CALL_HA): New.
(R_NIOS2_ILLEGAL): Adjust.
2014-01-30 Sandra Loosemore <sandra@codesourcery.com>
* nios2.h (elf_nios2_reloc_type): Add R_NIOS2_CALL26_NOAT.

6
include/elf/nios2.h
View File

@ -76,7 +76,11 @@ START_RELOC_NUMBERS (elf_nios2_reloc_type)
RELOC_NUMBER (R_NIOS2_RELATIVE, 39)
RELOC_NUMBER (R_NIOS2_GOTOFF, 40)
RELOC_NUMBER (R_NIOS2_CALL26_NOAT, 41)
RELOC_NUMBER (R_NIOS2_ILLEGAL, 42)
RELOC_NUMBER (R_NIOS2_GOT_LO, 42)
RELOC_NUMBER (R_NIOS2_GOT_HA, 43)
RELOC_NUMBER (R_NIOS2_CALL_LO, 44)
RELOC_NUMBER (R_NIOS2_CALL_HA, 45)
RELOC_NUMBER (R_NIOS2_ILLEGAL, 46)
END_RELOC_NUMBERS (R_NIOS2_maxext)
/* Processor-specific section flags. */