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* elf64-ppc.c (STFD_FR0_0R1, LFD_FR0_0R1, BLR): Define. 

(struct ppc_link_hash_table): Add sfpr.
	(ppc64_elf_link_hash_table_create): Init it.
	(ppc64_elf_create_dynamic_sections): Split creation of .stub and
	.glink out to..
	(create_linkage_sections): ..here.  Make .sfpr too.
	(ppc64_elf_check_relocs): Call create_linkage_sections, and set
	dynobj early.
	(MIN_SAVE_FPR, MAX_SAVE_FPR): Define.
	(ppc64_elf_func_desc_adjust): Look for missing ._savef* and
	._restf* functions, and create as needed.
	(func_desc_adjust): Only force_local for shared libs.

	* emulparams/elf64ppc.sh (OTHER_TEXT_SECTIONS): Define.
readline_4_3-import-branch
Alan Modra 24 years ago
parent
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82bd7b59c9
4 changed files with 171 additions and 31 deletions
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  1. 15
      bfd/ChangeLog
  2. 182
      bfd/elf64-ppc.c
  3. 4
      ld/ChangeLog
  4. 1
      ld/emulparams/elf64ppc.sh

15
bfd/ChangeLog
View File

@ -1,3 +1,18 @@
2002-02-18 Alan Modra <amodra@bigpond.net.au>
* elf64-ppc.c (STFD_FR0_0R1, LFD_FR0_0R1, BLR): Define.
(struct ppc_link_hash_table): Add sfpr.
(ppc64_elf_link_hash_table_create): Init it.
(ppc64_elf_create_dynamic_sections): Split creation of .stub and
.glink out to..
(create_linkage_sections): ..here. Make .sfpr too.
(ppc64_elf_check_relocs): Call create_linkage_sections, and set
dynobj early.
(MIN_SAVE_FPR, MAX_SAVE_FPR): Define.
(ppc64_elf_func_desc_adjust): Look for missing ._savef* and
._restf* functions, and create as needed.
(func_desc_adjust): Only force_local for shared libs.
2002-02-18 David O'Brien <obrien@FreeBSD.org>
* configure.in: Bump version number post 2.12 branching.

182
bfd/elf64-ppc.c
View File

@ -51,6 +51,8 @@ static struct bfd_hash_entry *link_hash_newfunc
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create
PARAMS ((bfd *));
static boolean create_linkage_sections
PARAMS ((bfd *, struct bfd_link_info *));
static boolean create_got_section
PARAMS ((bfd *, struct bfd_link_info *));
static boolean ppc64_elf_create_dynamic_sections
@ -153,6 +155,11 @@ static boolean ppc64_elf_finish_dynamic_sections
#define LIS_R0_0 0x3c000000 /* lis %r0,0 */
#define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
/* Instructions to save and restore floating point regs. */
#define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
#define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
#define BLR 0x4e800020 /* blr */
/* Since .opd is an array of descriptors and each entry will end up
with identical R_PPC64_RELATIVE relocs, there is really no need to
propagate .opd relocs; The dynamic linker should be taught to
@ -1719,6 +1726,7 @@ struct ppc_link_hash_table
asection *srelbss;
asection *sstub;
asection *sglink;
asection *sfpr;
/* Set on error. */
int plt_overflow;
@ -1790,12 +1798,49 @@ ppc64_elf_link_hash_table_create (abfd)
htab->srelbss = NULL;
htab->sstub = NULL;
htab->sglink = NULL;
htab->sfpr = NULL;
htab->plt_overflow = 0;
htab->sym_sec.abfd = NULL;
return &htab->elf.root;
}
/* Create sections for linker generated code. */
static boolean
create_linkage_sections (dynobj, info)
bfd *dynobj;
struct bfd_link_info *info;
{
struct ppc_link_hash_table *htab;
flagword flags;
htab = ppc_hash_table (info);
/* Create .sfpr for code to save and restore fp regs. */
flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
htab->sfpr = bfd_make_section (dynobj, ".sfpr");
if (htab->sfpr == NULL
|| ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
|| ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
return false;
/* Create .stub and .glink for global linkage functions. */
htab->sstub = bfd_make_section (dynobj, ".stub");
if (htab->sstub == NULL
|| ! bfd_set_section_flags (dynobj, htab->sstub, flags)
|| ! bfd_set_section_alignment (dynobj, htab->sstub, 2))
return false;
htab->sglink = bfd_make_section (dynobj, ".glink");
if (htab->sglink == NULL
|| ! bfd_set_section_flags (dynobj, htab->sglink, flags)
|| ! bfd_set_section_alignment (dynobj, htab->sglink, 2))
return false;
return true;
}
/* Create .got and .rela.got sections in DYNOBJ, and set up
shortcuts to them in our hash table. */
@ -1825,8 +1870,7 @@ create_got_section (dynobj, info)
return true;
}
/* Create the .stub and .glink sections as well as the ordinary
dynamic sections. */
/* Create the dynamic sections, and set up shortcuts. */
static boolean
ppc64_elf_create_dynamic_sections (dynobj, info)
@ -1834,7 +1878,6 @@ ppc64_elf_create_dynamic_sections (dynobj, info)
struct bfd_link_info *info;
{
struct ppc_link_hash_table *htab;
flagword flags;
htab = ppc_hash_table (info);
if (!htab->sgot && !create_got_section (dynobj, info))
@ -1853,20 +1896,6 @@ ppc64_elf_create_dynamic_sections (dynobj, info)
|| (!info->shared && !htab->srelbss))
abort ();
/* Create .stub and .glink for global linkage functions. */
flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
htab->sstub = bfd_make_section (dynobj, ".stub");
if (htab->sstub == NULL
|| ! bfd_set_section_flags (dynobj, htab->sstub, flags)
|| ! bfd_set_section_alignment (dynobj, htab->sstub, 2))
return false;
htab->sglink = bfd_make_section (dynobj, ".glink");
if (htab->sglink == NULL
|| ! bfd_set_section_flags (dynobj, htab->sglink, flags)
|| ! bfd_set_section_alignment (dynobj, htab->sglink, 3))
return false;
return true;
}
@ -1955,6 +1984,12 @@ ppc64_elf_check_relocs (abfd, info, sec, relocs)
sreloc = NULL;
is_opd = strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0;
if (htab->elf.dynobj == NULL)
htab->elf.dynobj = abfd;
if (htab->sfpr == NULL
&& !create_linkage_sections (htab->elf.dynobj, info))
return false;
rel_end = relocs + sec->reloc_count;
for (rel = relocs; rel < rel_end; rel++)
{
@ -1980,13 +2015,9 @@ ppc64_elf_check_relocs (abfd, info, sec, relocs)
case R_PPC64_GOT16_LO_DS:
/* This symbol requires a global offset table entry. */
if (htab->sgot == NULL)
{
if (htab->elf.dynobj == NULL)
htab->elf.dynobj = abfd;
if (!create_got_section (htab->elf.dynobj, info))
return false;
}
if (htab->sgot == NULL
&& !create_got_section (htab->elf.dynobj, info))
return false;
if (h != NULL)
{
@ -2197,9 +2228,6 @@ ppc64_elf_check_relocs (abfd, info, sec, relocs)
bfd_set_error (bfd_error_bad_value);
}
if (htab->elf.dynobj == NULL)
htab->elf.dynobj = abfd;
dynobj = htab->elf.dynobj;
sreloc = bfd_get_section_by_name (dynobj, name);
if (sreloc == NULL)
@ -2554,25 +2582,117 @@ func_desc_adjust (h, inf)
been imported from another library. Function code syms that
are really in the library we must leave global to prevent the
linker dragging in a definition from a static library. */
force_local = (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0;
force_local = ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
&& info->shared);
_bfd_elf_link_hash_hide_symbol (info, h, force_local);
}
return true;
}
#define MIN_SAVE_FPR 14
#define MAX_SAVE_FPR 31
/* Called near the start of bfd_elf_size_dynamic_sections. We use
this hook to transfer dynamic linking information gathered so far
on function code symbol entries, to their corresponding function
descriptor symbol entries. */
this hook to a) provide some gcc support functions, and b) transfer
dynamic linking information gathered so far on function code symbol
entries, to their corresponding function descriptor symbol entries. */
static boolean
ppc64_elf_func_desc_adjust (obfd, info)
bfd *obfd ATTRIBUTE_UNUSED;
struct bfd_link_info *info;
{
struct ppc_link_hash_table *htab;
unsigned int lowest_savef = MAX_SAVE_FPR + 2;
unsigned int lowest_restf = MAX_SAVE_FPR + 2;
unsigned int i;
struct elf_link_hash_entry *h;
char sym[10];
htab = ppc_hash_table (info);
if (htab->sfpr == NULL)
/* We don't have any relocs. */
return true;
/* First provide any missing ._savef* and ._restf* functions. */
memcpy (sym, "._savef14", 10);
for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
{
sym[7] = i / 10 + '0';
sym[8] = i % 10 + '0';
h = elf_link_hash_lookup (&htab->elf, sym, false, false, true);
if (h != NULL
&& h->root.type == bfd_link_hash_undefined)
{
if (lowest_savef > i)
lowest_savef = i;
h->root.type = bfd_link_hash_defined;
h->root.u.def.section = htab->sfpr;
h->root.u.def.value = (i - lowest_savef) * 4;
h->type = STT_FUNC;
h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
_bfd_elf_link_hash_hide_symbol (info, h, info->shared);
}
}
memcpy (sym, "._restf14", 10);
for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
{
sym[7] = i / 10 + '0';
sym[8] = i % 10 + '0';
h = elf_link_hash_lookup (&htab->elf, sym, false, false, true);
if (h != NULL
&& h->root.type == bfd_link_hash_undefined)
{
if (lowest_restf > i)
lowest_restf = i;
h->root.type = bfd_link_hash_defined;
h->root.u.def.section = htab->sfpr;
h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
+ (i - lowest_restf) * 4);
h->type = STT_FUNC;
h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
_bfd_elf_link_hash_hide_symbol (info, h, info->shared);
}
}
htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
+ (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
if (htab->sfpr->_raw_size == 0)
{
_bfd_strip_section_from_output (info, htab->sfpr);
}
else
{
bfd_byte *p = (bfd_byte *) bfd_alloc (htab->elf.dynobj,
htab->sfpr->_raw_size);
if (p == NULL)
return false;
htab->sfpr->contents = p;
for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
{
unsigned int fpr = i << 21;
unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
p += 4;
}
bfd_put_32 (htab->elf.dynobj, BLR, p);
p += 4;
for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
{
unsigned int fpr = i << 21;
unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
p += 4;
}
bfd_put_32 (htab->elf.dynobj, BLR, p);
p += 4;
}
elf_link_hash_traverse (&htab->elf, func_desc_adjust, (PTR) info);
return true;
}

4
ld/ChangeLog
View File

@ -1,3 +1,7 @@
2002-02-18 Alan Modra <amodra@bigpond.net.au>
* emulparams/elf64ppc.sh (OTHER_TEXT_SECTIONS): Define.
2002-02-18 David O'Brien <obrien@FreeBSD.org>
* Makefile.in: Add new files earmelf_fbsd, eelf32ppc_fbsd,

1
ld/emulparams/elf64ppc.sh
View File

@ -15,6 +15,7 @@ CTOR_START='PROVIDE (__CTOR_LIST__ = .); PROVIDE (___CTOR_LIST__ = .);'
CTOR_END='PROVIDE (__CTOR_END__ = .); PROVIDE (___CTOR_END__ = .);'
DTOR_START='PROVIDE (__DTOR_LIST__ = .); PROVIDE (___DTOR_LIST__ = .);'
DTOR_END='PROVIDE (__DTOR_END__ = .); PROVIDE (___DTOR_END__ = .);'
OTHER_TEXT_SECTIONS="*(.sfpr .glink)"
BSS_PLT=
OTHER_BSS_SYMBOLS="
.tocbss ${RELOCATING-0}${RELOCATING+ALIGN(8)} : { *(.tocbss)}"

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