/* MIPS-specific support for ELF
Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
- 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+ 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
Most of the information added by Ian Lance Taylor, Cygnus Support,
<ian@cygnus.com>.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
+
/* This file handles functionality common to the different MIPS ABI's. */
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "libbfd.h"
#include "libiberty.h"
#include "elf-bfd.h"
bfd_boolean mips16_stubs_seen;
/* True if we're generating code for VxWorks. */
bfd_boolean is_vxworks;
+ /* True if we already reported the small-data section overflow. */
+ bfd_boolean small_data_overflow_reported;
/* Shortcuts to some dynamic sections, or NULL if they are not
being used. */
asection *srelbss;
\f
static struct mips_got_entry *mips_elf_create_local_got_entry
(bfd *, struct bfd_link_info *, bfd *, struct mips_got_info *, asection *,
- asection *, bfd_vma, unsigned long, struct mips_elf_link_hash_entry *, int);
+ bfd_vma, unsigned long, struct mips_elf_link_hash_entry *, int);
static bfd_boolean mips_elf_sort_hash_table_f
(struct mips_elf_link_hash_entry *, void *);
static bfd_vma mips_elf_high
return got_address - got_value;
}
-/* Return the GOT offset for address VALUE, which was derived from
- a symbol belonging to INPUT_SECTION. If there is not yet a GOT
+/* Return the GOT offset for address VALUE. If there is not yet a GOT
entry for this value, create one. If R_SYMNDX refers to a TLS symbol,
create a TLS GOT entry instead. Return -1 if no satisfactory GOT
offset can be found. */
static bfd_vma
mips_elf_local_got_index (bfd *abfd, bfd *ibfd, struct bfd_link_info *info,
- asection *input_section, bfd_vma value,
- unsigned long r_symndx,
+ bfd_vma value, unsigned long r_symndx,
struct mips_elf_link_hash_entry *h, int r_type)
{
asection *sgot;
g = mips_elf_got_info (elf_hash_table (info)->dynobj, &sgot);
entry = mips_elf_create_local_got_entry (abfd, info, ibfd, g, sgot,
- input_section, value,
- r_symndx, h, r_type);
+ value, r_symndx, h, r_type);
if (!entry)
return MINUS_ONE;
return index;
}
-/* Find a GOT page entry that points to within 32KB of VALUE, which was
- calculated from a symbol belonging to INPUT_SECTION. These entries
- are supposed to be placed at small offsets in the GOT, i.e., within
- 32KB of GP. Return the index of the GOT entry, or -1 if no entry
- could be created. If OFFSETP is nonnull, use it to return the
+/* Find a GOT page entry that points to within 32KB of VALUE. These
+ entries are supposed to be placed at small offsets in the GOT, i.e.,
+ within 32KB of GP. Return the index of the GOT entry, or -1 if no
+ entry could be created. If OFFSETP is nonnull, use it to return the
offset of the GOT entry from VALUE. */
static bfd_vma
mips_elf_got_page (bfd *abfd, bfd *ibfd, struct bfd_link_info *info,
- asection *input_section, bfd_vma value, bfd_vma *offsetp)
+ bfd_vma value, bfd_vma *offsetp)
{
asection *sgot;
struct mips_got_info *g;
page = (value + 0x8000) & ~(bfd_vma) 0xffff;
entry = mips_elf_create_local_got_entry (abfd, info, ibfd, g, sgot,
- input_section, page, 0,
- NULL, R_MIPS_GOT_PAGE);
+ page, 0, NULL, R_MIPS_GOT_PAGE);
if (!entry)
return MINUS_ONE;
return index;
}
-/* Find a local GOT entry for an R_MIPS_GOT16 relocation against VALUE,
- which was calculated from a symbol belonging to INPUT_SECTION.
+/* Find a local GOT entry for an R_MIPS_GOT16 relocation against VALUE.
EXTERNAL is true if the relocation was against a global symbol
that has been forced local. */
static bfd_vma
mips_elf_got16_entry (bfd *abfd, bfd *ibfd, struct bfd_link_info *info,
- asection *input_section, bfd_vma value,
- bfd_boolean external)
+ bfd_vma value, bfd_boolean external)
{
asection *sgot;
struct mips_got_info *g;
g = mips_elf_got_info (elf_hash_table (info)->dynobj, &sgot);
entry = mips_elf_create_local_got_entry (abfd, info, ibfd, g, sgot,
- input_section, value, 0,
- NULL, R_MIPS_GOT16);
+ value, 0, NULL, R_MIPS_GOT16);
if (entry)
return entry->gotidx;
else
static struct mips_got_entry *
mips_elf_create_local_got_entry (bfd *abfd, struct bfd_link_info *info,
bfd *ibfd, struct mips_got_info *gg,
- asection *sgot, asection *input_section,
- bfd_vma value, unsigned long r_symndx,
+ asection *sgot, bfd_vma value,
+ unsigned long r_symndx,
struct mips_elf_link_hash_entry *h,
int r_type)
{
MIPS_ELF_PUT_WORD (abfd, value,
(sgot->contents + entry.gotidx));
- /* These GOT entries need a dynamic relocation on VxWorks. Because
- the offset between segments is not fixed, the relocation must be
- against a symbol in the same segment as the original symbol.
- The easiest way to do this is to take INPUT_SECTION's output
- section and emit a relocation against its section symbol. */
+ /* These GOT entries need a dynamic relocation on VxWorks. */
if (htab->is_vxworks)
{
Elf_Internal_Rela outrel;
- asection *s, *output_section;
+ asection *s;
bfd_byte *loc;
bfd_vma got_address;
- int dynindx;
s = mips_elf_rel_dyn_section (info, FALSE);
- output_section = input_section->output_section;
- dynindx = elf_section_data (output_section)->dynindx;
got_address = (sgot->output_section->vma
+ sgot->output_offset
+ entry.gotidx);
loc = s->contents + (s->reloc_count++ * sizeof (Elf32_External_Rela));
outrel.r_offset = got_address;
- outrel.r_info = ELF32_R_INFO (dynindx, R_MIPS_32);
- outrel.r_addend = value - output_section->vma;
+ outrel.r_info = ELF32_R_INFO (STN_UNDEF, R_MIPS_32);
+ outrel.r_addend = value;
bfd_elf32_swap_reloca_out (abfd, &outrel, loc);
}
struct mips_got_entry *entry = (struct mips_got_entry *)*entryp;
struct mips_got_info *g = p;
bfd_vma next_index;
+ unsigned char tls_type;
/* We're only interested in TLS symbols. */
if (entry->tls_type == 0)
return 1;
entry->d.h->tls_type |= GOT_TLS_OFFSET_DONE;
entry->d.h->tls_got_offset = next_index;
+ tls_type = entry->d.h->tls_type;
}
else
{
g->tls_ldm_offset = next_index;
}
entry->gotidx = next_index;
+ tls_type = entry->tls_type;
}
/* Account for the entries we've just allocated. */
- if (entry->tls_type & (GOT_TLS_GD | GOT_TLS_LDM))
+ if (tls_type & (GOT_TLS_GD | GOT_TLS_LDM))
g->tls_assigned_gotno += 2;
- if (entry->tls_type & GOT_TLS_IE)
+ if (tls_type & GOT_TLS_IE)
g->tls_assigned_gotno += 1;
return 1;
/* If this is a 16-bit call to a 32- or 64-bit function with a stub, we
need to redirect the call to the stub. */
else if (r_type == R_MIPS16_26 && !info->relocatable
- && h != NULL
- && ((h->call_stub != NULL || h->call_fp_stub != NULL)
+ && ((h != NULL && (h->call_stub != NULL || h->call_fp_stub != NULL))
|| (local_p
&& elf_tdata (input_bfd)->local_call_stubs != NULL
&& elf_tdata (input_bfd)->local_call_stubs[r_symndx] != NULL))
if (r_type == R_MIPS_TLS_LDM)
{
g = mips_elf_local_got_index (abfd, input_bfd, info,
- sec, 0, 0, NULL, r_type);
+ 0, 0, NULL, r_type);
if (g == MINUS_ONE)
return bfd_reloc_outofrange;
}
break;
else
{
- g = mips_elf_local_got_index (abfd, input_bfd, info, sec,
+ g = mips_elf_local_got_index (abfd, input_bfd, info,
symbol + addend, r_symndx, h, r_type);
if (g == MINUS_ONE)
return bfd_reloc_outofrange;
break;
case R_MIPS_TLS_DTPREL_LO16:
+ case R_MIPS_TLS_DTPREL32:
+ case R_MIPS_TLS_DTPREL64:
value = (symbol + addend - dtprel_base (info)) & howto->dst_mask;
break;
forced = ! mips_elf_local_relocation_p (input_bfd, relocation,
local_sections, FALSE);
- value = mips_elf_got16_entry (abfd, input_bfd, info, sec,
+ value = mips_elf_got16_entry (abfd, input_bfd, info,
symbol + addend, forced);
if (value == MINUS_ONE)
return bfd_reloc_outofrange;
0. */
if (! local_p)
goto got_disp;
- value = mips_elf_got_page (abfd, input_bfd, info, sec,
- symbol + addend, NULL);
+ value = mips_elf_got_page (abfd, input_bfd, info, symbol + addend, NULL);
if (value == MINUS_ONE)
return bfd_reloc_outofrange;
value = mips_elf_got_offset_from_index (dynobj, abfd, input_bfd, value);
case R_MIPS_GOT_OFST:
if (local_p)
- mips_elf_got_page (abfd, input_bfd, info, sec,
- symbol + addend, &value);
+ mips_elf_got_page (abfd, input_bfd, info, symbol + addend, &value);
else
value = addend;
overflowed_p = mips_elf_overflow_p (value, 16);
outrel[0].r_offset =
_bfd_elf_section_offset (output_bfd, info, input_section, rel[0].r_offset);
- outrel[1].r_offset =
- _bfd_elf_section_offset (output_bfd, info, input_section, rel[1].r_offset);
- outrel[2].r_offset =
- _bfd_elf_section_offset (output_bfd, info, input_section, rel[2].r_offset);
+ if (ABI_64_P (output_bfd))
+ {
+ outrel[1].r_offset =
+ _bfd_elf_section_offset (output_bfd, info, input_section, rel[1].r_offset);
+ outrel[2].r_offset =
+ _bfd_elf_section_offset (output_bfd, info, input_section, rel[2].r_offset);
+ }
if (outrel[0].r_offset == MINUS_ONE)
/* The relocation field has been deleted. */
bfd_boolean
_bfd_mips_elf_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec)
{
- register const char *name;
- unsigned int sh_type;
-
- name = bfd_get_section_name (abfd, sec);
- sh_type = hdr->sh_type;
+ const char *name = bfd_get_section_name (abfd, sec);
if (strcmp (name, ".liblist") == 0)
{
hdr->sh_entsize = 8;
}
- /* In the unlikely event a special section is empty it has to lose its
- special meaning. This may happen e.g. when using `strip' with the
- "--only-keep-debug" option. */
- if (sec->size > 0 && !(sec->flags & SEC_HAS_CONTENTS))
- hdr->sh_type = sh_type;
-
/* The generic elf_fake_sections will set up REL_HDR using the default
kind of relocations. We used to set up a second header for the
non-default kind of relocations here, but only NewABI would use
bfd *dynobj;
struct mips_elf_link_hash_entry *hmips;
struct mips_elf_link_hash_table *htab;
- unsigned int power_of_two;
htab = mips_elf_hash_table (info);
dynobj = elf_hash_table (info)->dynobj;
h->needs_copy = 1;
}
- /* We need to figure out the alignment required for this symbol. */
- power_of_two = bfd_log2 (h->size);
- if (power_of_two > 4)
- power_of_two = 4;
-
- /* Apply the required alignment. */
- htab->sdynbss->size = BFD_ALIGN (htab->sdynbss->size,
- (bfd_size_type) 1 << power_of_two);
- if (power_of_two > bfd_get_section_alignment (dynobj, htab->sdynbss)
- && !bfd_set_section_alignment (dynobj, htab->sdynbss, power_of_two))
- return FALSE;
-
- /* Define the symbol as being at this point in the section. */
- h->root.u.def.section = htab->sdynbss;
- h->root.u.def.value = htab->sdynbss->size;
-
- /* Increment the section size to make room for the symbol. */
- htab->sdynbss->size += h->size;
-
- return TRUE;
+ return _bfd_elf_adjust_dynamic_copy (h, htab->sdynbss);
}
\f
/* Return the number of dynamic section symbols required by OUTPUT_BFD.
/* Add some entries to the .dynamic section. We fill in the
values later, in _bfd_mips_elf_finish_dynamic_sections, but we
must add the entries now so that we get the correct size for
- the .dynamic section. The DT_DEBUG entry is filled in by the
- dynamic linker and used by the debugger. */
- if (info->executable
- && !SGI_COMPAT (output_bfd)
- && !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_DEBUG, 0))
- return FALSE;
+ the .dynamic section. */
/* SGI object has the equivalence of DT_DEBUG in the
- DT_MIPS_RLD_MAP entry. */
+ DT_MIPS_RLD_MAP entry. This must come first because glibc
+ only fills in DT_MIPS_RLD_MAP (not DT_DEBUG) and GDB only
+ looks at the first one it sees. */
if (!info->shared
&& !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_RLD_MAP, 0))
return FALSE;
+ /* The DT_DEBUG entry may be filled in by the dynamic linker and
+ used by the debugger. */
+ if (info->executable
+ && !SGI_COMPAT (output_bfd)
+ && !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_DEBUG, 0))
+ return FALSE;
+
if (reltext && (SGI_COMPAT (output_bfd) || htab->is_vxworks))
info->flags |= DF_TEXTREL;
;
else
{
+ struct mips_elf_link_hash_table *htab;
+
+ htab = mips_elf_hash_table (info);
BFD_ASSERT (name != NULL);
+ if (!htab->small_data_overflow_reported
+ && (howto->type == R_MIPS_GPREL16
+ || howto->type == R_MIPS_LITERAL))
+ {
+ const char *msg =
+ _("small-data section exceeds 64KB;"
+ " lower small-data size limit (see option -G)");
+
+ htab->small_data_overflow_reported = TRUE;
+ (*info->callbacks->einfo) ("%P: %s\n", msg);
+ }
if (! ((*info->callbacks->reloc_overflow)
(info, NULL, name, howto->name, (bfd_vma) 0,
input_bfd, input_section, rel->r_offset)))
ret->rld_value = 0;
ret->mips16_stubs_seen = FALSE;
ret->is_vxworks = FALSE;
+ ret->small_data_overflow_reported = FALSE;
ret->srelbss = NULL;
ret->sdynbss = NULL;
ret->srelplt = NULL;
}
+/* Merge object attributes from IBFD into OBFD. Raise an error if
+ there are conflicting attributes. */
+static bfd_boolean
+mips_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
+{
+ obj_attribute *in_attr;
+ obj_attribute *out_attr;
+
+ if (!elf_known_obj_attributes_proc (obfd)[0].i)
+ {
+ /* This is the first object. Copy the attributes. */
+ _bfd_elf_copy_obj_attributes (ibfd, obfd);
+
+ /* Use the Tag_null value to indicate the attributes have been
+ initialized. */
+ elf_known_obj_attributes_proc (obfd)[0].i = 1;
+
+ return TRUE;
+ }
+
+ /* Check for conflicting Tag_GNU_MIPS_ABI_FP attributes and merge
+ non-conflicting ones. */
+ in_attr = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
+ out_attr = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
+ if (in_attr[Tag_GNU_MIPS_ABI_FP].i != out_attr[Tag_GNU_MIPS_ABI_FP].i)
+ {
+ out_attr[Tag_GNU_MIPS_ABI_FP].type = 1;
+ if (out_attr[Tag_GNU_MIPS_ABI_FP].i == 0)
+ out_attr[Tag_GNU_MIPS_ABI_FP].i = in_attr[Tag_GNU_MIPS_ABI_FP].i;
+ else if (in_attr[Tag_GNU_MIPS_ABI_FP].i == 0)
+ ;
+ else if (in_attr[Tag_GNU_MIPS_ABI_FP].i > 3)
+ _bfd_error_handler
+ (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
+ in_attr[Tag_GNU_MIPS_ABI_FP].i);
+ else if (out_attr[Tag_GNU_MIPS_ABI_FP].i > 3)
+ _bfd_error_handler
+ (_("Warning: %B uses unknown floating point ABI %d"), obfd,
+ out_attr[Tag_GNU_MIPS_ABI_FP].i);
+ else
+ switch (out_attr[Tag_GNU_MIPS_ABI_FP].i)
+ {
+ case 1:
+ switch (in_attr[Tag_GNU_MIPS_ABI_FP].i)
+ {
+ case 2:
+ _bfd_error_handler
+ (_("Warning: %B uses -msingle-float, %B uses -mdouble-float"),
+ obfd, ibfd);
+
+ case 3:
+ _bfd_error_handler
+ (_("Warning: %B uses hard float, %B uses soft float"),
+ obfd, ibfd);
+ break;
+
+ default:
+ abort ();
+ }
+ break;
+
+ case 2:
+ switch (in_attr[Tag_GNU_MIPS_ABI_FP].i)
+ {
+ case 1:
+ _bfd_error_handler
+ (_("Warning: %B uses -msingle-float, %B uses -mdouble-float"),
+ ibfd, obfd);
+
+ case 3:
+ _bfd_error_handler
+ (_("Warning: %B uses hard float, %B uses soft float"),
+ obfd, ibfd);
+ break;
+
+ default:
+ abort ();
+ }
+ break;
+
+ case 3:
+ switch (in_attr[Tag_GNU_MIPS_ABI_FP].i)
+ {
+ case 1:
+ case 2:
+ _bfd_error_handler
+ (_("Warning: %B uses hard float, %B uses soft float"),
+ ibfd, obfd);
+ break;
+
+ default:
+ abort ();
+ }
+ break;
+
+ default:
+ abort ();
+ }
+ }
+
+ /* Merge Tag_compatibility attributes and any common GNU ones. */
+ _bfd_elf_merge_object_attributes (ibfd, obfd);
+
+ return TRUE;
+}
+
/* Merge backend specific data from an object file to the output
object file when linking. */
return FALSE;
}
+ if (!mips_elf_merge_obj_attributes (ibfd, obfd))
+ return FALSE;
+
new_flags = elf_elfheader (ibfd)->e_flags;
elf_elfheader (obfd)->e_flags |= new_flags & EF_MIPS_NOREORDER;
old_flags = elf_elfheader (obfd)->e_flags;
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