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PATCH for N32 ABI
- To: binutils@sourceware.cygnus.com
- Subject: PATCH for N32 ABI
- From: Mark Mitchell <mark@codesourcery.com>
- Date: Tue, 29 Jun 1999 00:50:00 -0700
- Organization: CodeSourcery, LLC
This patch represents the balance of the work necessary to get GNU ld
working with the N32 ABI. A GCC configured --with-gnu-ld for the
resulting linker bootstraps sucessfully and to pass all regression
tests.
The major changes in this patch are:
o Total rewrite of relocation processing. This is necessary because
the N32 ABI allows multiple relocations for the same address. The
idea is that you perform one relocation, and use it as the addend
for the next. Intermediate results may overflow the field width
(even though the final result will not), so the traditional HOWTO
approach doesn't really work; there, the computed value is written
back after each computation. I did not remove the
HOWTO-processing functions yet; that would have just cluttered up
the patch, and made it harder to fix problems that arise with the
new scheme. (As it stands, it's easy to find the original code.)
Once the new scheme gets some testing, and the 64-bit ABI is
implemented, it would make sense to pull out these functions.
o We now sort the dynamic symbol table so that entries that need
GOT entries are at the end. The ABI requires that we declare the
first dynamic symbol with a GOT entry, and that all
higher-numbered ones receive GOT entries. Thus, sorting the
symbol table is essential in order not to wish undue amounts
of GOT space.
o There are a few other IRIX6-specific tweaks and miscellaneous
bug-fixes.
This is the first patch in the series that will affect targets other
than IRIX6. Obviously, I've done my best to avoid breaking them, and
will endeavor to fix any problems that arise.
OK to check in?
--
Mark Mitchell mark@codesourcery.com
CodeSourcery, LLC http://www.codesourcery.com
1999-06-28 Mark Mitchell <mark@codesourcery.com>
* elf32-mips.c (mips_elf_got_info): Move declaration before
prototypes. Change global_gotsym to be a pointer to a hash entry,
rather than a number index.
(mips_elf_link_hash_entry): Move declaration before prototypes.
(mips_elf_irix6_finish_dynamic_symbol): New function.
(mips_elf_sign_extend): Likewise.
(mips_elf_high): Likewise.
(mips_elf_higher): Likewise.
(mips_elf_highest): Likewise.
(mips_elf_global_got_index): Likewise.
(mips_elf_local_got_index): Likewise.
(mips_elf_got_offset_from_index): Likeiwse.
(mips_elf_record_global_got_symbol): Likewise.
(mips_elf_got_page): Likewise.
(mips_elf_next_lo16_addend): Likewise.
(mips_elf_calculate_relocation): Likewise.
(mips_elf_obtain_contents): Likewise.
(mips_elf_perform_relocation): Likewise.
(mips_elf_assign_gp): Likewise.
(mips_elf_sort_hash_table_f): Likewise.
(mips_elf_sort_hash_table): Likewise.
(mips_elf_got_section): Likewise.
(mips_elf_got_info): Likewise.
(mips_elf_create_local_got_entry): Likewise.
(mips_elf_got16_entry): Likewise.
(mips_elf_create_dynamic_relocation): Likewise.
(elf_mips_howto_table): Add description of R_MIPS_SCN_DISP.
(mips_elf_final_gp): Use mips_elf_assign_gp.
(_bfd_mips_elf_symbol_processing): Don't move SHN_COMMON symbols
into SHN_SCOMMON automatically on IRIX6.
(mips_elf_add_symbol_hook): Likewise.
(mips_elf_relocate_section): Rewrite, using
mips_elf_calculate_relocation and mips_elf_perform_relocation.
(mips_elf_create_dynamic_section): Use MIPS_ELF_STUB_SECTION_NAME.
Don't deal with .rld_map on IRIX6.
(mips_elf_create_got_section): Adjust use of global_gotsym. Set
section flags appropriately for .got.
(mips_elf_check_relocs): Handle IRIX6 relocations making use of
the got. Call mips_elf_record_global_got_symbol and allocate
local got space appropriately.
(mips_elf_size_dynamic_sections): Use bfd_byte *, not unsigned
char *. Rework calculation of GOT size. Sort dynamic symbol
table entries so entries that do not require GOT entries appear at
the beginning. Don't use DT_MIPS_HIPAGENO on IRIX6. Remove dead
code dealing with DT_INIT and DT_FINI. Remove fiddling with
global_gotsym.
(mips_elf_finish_dynamic_symbol): Adjust creation of global GOT
entries.
(mips_elf_finish_dynamic_symbol): Use
mips_elf_irix6_finish_dynamic_symbol.
(mips_elf_finish_dynamic_sections): Correct off-by-one error
setting DT_MIPS_UNREFEXTNO. Adjust setting of DT_MIPS_GOTSYM for
change to global_gotsym. Set DT_MIPS_OPTIONS on IRIX6.
Index: elf32-mips.c
===================================================================
RCS file: /cvs/binutils/binutils/bfd/elf32-mips.c,v
retrieving revision 1.9
diff -u -p -r1.9 elf32-mips.c
--- elf32-mips.c 1999/06/27 21:23:34 1.9
+++ elf32-mips.c 1999/06/28 19:48:51
@@ -41,6 +41,54 @@ Foundation, Inc., 59 Temple Place - Suit
#define ECOFF_32
#include "ecoffswap.h"
+/* This structure is used to hold .got information when linking. It
+ is stored in the tdata field of the bfd_elf_section_data structure. */
+
+struct mips_got_info
+{
+ /* The global symbol in the GOT with the lowest index in the dynamic
+ symbol table. */
+ struct elf_link_hash_entry *global_gotsym;
+ /* The number of local .got entries. */
+ unsigned int local_gotno;
+ /* The number of local .got entries we have used. */
+ unsigned int assigned_gotno;
+};
+
+/* The MIPS ELF linker needs additional information for each symbol in
+ the global hash table. */
+
+struct mips_elf_link_hash_entry
+{
+ struct elf_link_hash_entry root;
+
+ /* External symbol information. */
+ EXTR esym;
+
+ /* Number of MIPS_32 or MIPS_REL32 relocs against this symbol. */
+ unsigned int mips_32_relocs;
+
+ /* The index of the first dynamic relocation (in the .rel.dyn
+ section) against this symbol. */
+ unsigned int min_dyn_reloc_index;
+
+ /* If there is a stub that 32 bit functions should use to call this
+ 16 bit function, this points to the section containing the stub. */
+ asection *fn_stub;
+
+ /* Whether we need the fn_stub; this is set if this symbol appears
+ in any relocs other than a 16 bit call. */
+ boolean need_fn_stub;
+
+ /* If there is a stub that 16 bit functions should use to call this
+ 32 bit function, this points to the section containing the stub. */
+ asection *call_stub;
+
+ /* This is like the call_stub field, but it is used if the function
+ being called returns a floating point value. */
+ asection *call_fp_stub;
+};
+
static bfd_reloc_status_type mips32_64bit_reloc
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
@@ -128,6 +176,51 @@ static bfd_byte *elf32_mips_get_relocate
bfd_byte *, boolean, asymbol **));
static asection *mips_elf_create_msym_section
PARAMS ((bfd *));
+static void mips_elf_irix6_finish_dynamic_symbol
+ PARAMS ((bfd *, const char *, Elf_Internal_Sym *));
+static bfd_vma mips_elf_sign_extend PARAMS ((bfd_vma, int));
+static boolean mips_elf_overflow_p PARAMS ((bfd_vma, int));
+static bfd_vma mips_elf_high PARAMS ((bfd_vma));
+static bfd_vma mips_elf_higher PARAMS ((bfd_vma));
+static bfd_vma mips_elf_highest PARAMS ((bfd_vma));
+static bfd_vma mips_elf_global_got_index
+ PARAMS ((bfd *, struct elf_link_hash_entry *));
+static bfd_vma mips_elf_local_got_index
+ PARAMS ((bfd *, struct bfd_link_info *, bfd_vma));
+static bfd_vma mips_elf_got_offset_from_index
+ PARAMS ((bfd *, bfd *, bfd_vma));
+static boolean mips_elf_record_global_got_symbol
+ PARAMS ((struct elf_link_hash_entry *, struct bfd_link_info *,
+ struct mips_got_info *));
+static bfd_vma mips_elf_got_page
+ PARAMS ((bfd *, struct bfd_link_info *, bfd_vma, bfd_vma *));
+static boolean mips_elf_next_lo16_addend
+ PARAMS ((Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_vma *));
+static bfd_reloc_status_type mips_elf_calculate_relocation
+ PARAMS ((bfd *, bfd *, asection *, struct bfd_link_info *,
+ Elf_Internal_Rela *, bfd_vma, reloc_howto_type *,
+ Elf_Internal_Rela *, Elf_Internal_Sym *, asection **,
+ bfd_vma *, const char **));
+static bfd_vma mips_elf_obtain_contents
+ PARAMS ((reloc_howto_type *, Elf_Internal_Rela *, bfd *, bfd_byte *));
+static void mips_elf_perform_relocation
+ PARAMS ((reloc_howto_type *, Elf_Internal_Rela *, bfd_vma,
+ bfd *, bfd_byte *));
+static boolean mips_elf_assign_gp PARAMS ((bfd *, bfd_vma *));
+static boolean mips_elf_sort_hash_table_f
+ PARAMS ((struct mips_elf_link_hash_entry *, PTR));
+static boolean mips_elf_sort_hash_table
+ PARAMS ((struct bfd_link_info *));
+static asection * mips_elf_got_section PARAMS ((bfd *));
+static struct mips_got_info *mips_elf_got_info
+ PARAMS ((bfd *, asection **));
+static bfd_vma mips_elf_create_local_got_entry
+ PARAMS ((bfd *, struct mips_got_info *, asection *, bfd_vma));
+static bfd_vma mips_elf_got16_entry
+ PARAMS ((bfd *, struct bfd_link_info *, bfd_vma));
+static unsigned int mips_elf_create_dynamic_relocation
+ PARAMS ((bfd *, struct bfd_link_info *, Elf32_Internal_Rela *,
+ long, bfd_vma, asection *));
/* The level of IRIX compatibility we're striving for. */
@@ -154,19 +247,6 @@ typedef enum {
#define SGI_COMPAT(abfd) \
(IRIX_COMPAT (abfd) != ict_none)
-/* This structure is used to hold .got information when linking. It
- is stored in the tdata field of the bfd_elf_section_data structure. */
-
-struct mips_got_info
-{
- /* The symbol index of the first global .got symbol. */
- unsigned long global_gotsym;
- /* The number of local .got entries. */
- unsigned int local_gotno;
- /* The number of local .got entries we have used. */
- unsigned int assigned_gotno;
-};
-
/* The name of the msym section. */
#define MIPS_ELF_MSYM_SECTION_NAME(abfd) ".msym"
@@ -511,7 +591,6 @@ static reloc_howto_type elf_mips_howto_t
false), /* pcrel_offset */
/* 16 bit call through global offset table. */
- /* FIXME: This is not handled correctly. */
HOWTO (R_MIPS_CALL16, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
@@ -598,7 +677,6 @@ static reloc_howto_type elf_mips_howto_t
false), /* pcrel_offset */
/* Displacement in the global offset table. */
- /* FIXME: Not handled correctly. */
HOWTO (R_MIPS_GOT_DISP, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
@@ -614,7 +692,6 @@ static reloc_howto_type elf_mips_howto_t
false), /* pcrel_offset */
/* Displacement to page pointer in the global offset table. */
- /* FIXME: Not handled correctly. */
HOWTO (R_MIPS_GOT_PAGE, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
@@ -630,7 +707,6 @@ static reloc_howto_type elf_mips_howto_t
false), /* pcrel_offset */
/* Offset from page pointer in the global offset table. */
- /* FIXME: Not handled correctly. */
HOWTO (R_MIPS_GOT_OFST, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
@@ -646,7 +722,6 @@ static reloc_howto_type elf_mips_howto_t
false), /* pcrel_offset */
/* High 16 bits of displacement in global offset table. */
- /* FIXME: Not handled correctly. */
HOWTO (R_MIPS_GOT_HI16, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
@@ -662,7 +737,6 @@ static reloc_howto_type elf_mips_howto_t
false), /* pcrel_offset */
/* Low 16 bits of displacement in global offset table. */
- /* FIXME: Not handled correctly. */
HOWTO (R_MIPS_GOT_LO16, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
@@ -678,7 +752,6 @@ static reloc_howto_type elf_mips_howto_t
false), /* pcrel_offset */
/* 64 bit subtraction. Used in the N32 ABI. */
- /* FIXME: Not handled correctly. */
HOWTO (R_MIPS_SUB, /* type */
0, /* rightshift */
4, /* size (0 = byte, 1 = short, 2 = long) */
@@ -704,7 +777,6 @@ static reloc_howto_type elf_mips_howto_t
{ R_MIPS_HIGHEST },
/* High 16 bits of displacement in global offset table. */
- /* FIXME: Not handled correctly. */
HOWTO (R_MIPS_CALL_HI16, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
@@ -720,7 +792,6 @@ static reloc_howto_type elf_mips_howto_t
false), /* pcrel_offset */
/* Low 16 bits of displacement in global offset table. */
- /* FIXME: Not handled correctly. */
HOWTO (R_MIPS_CALL_LO16, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
@@ -734,8 +805,22 @@ static reloc_howto_type elf_mips_howto_t
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
false), /* pcrel_offset */
+
+ /* Section displacement. */
+ HOWTO (R_MIPS_SCN_DISP, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MIPS_SCN_DISP", /* name */
+ false, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ false), /* pcrel_offset */
- { R_MIPS_SCN_DISP },
{ R_MIPS_REL16 },
{ R_MIPS_ADD_IMMEDIATE },
{ R_MIPS_PJUMP },
@@ -1105,6 +1190,57 @@ _bfd_mips_elf_got16_reloc (abfd,
abort ();
}
+/* Set the GP value for OUTPUT_BFD. Returns false if this is a
+ dangerous relocation. */
+
+static boolean
+mips_elf_assign_gp (output_bfd, pgp)
+ bfd *output_bfd;
+ bfd_vma *pgp;
+{
+ unsigned int count;
+ asymbol **sym;
+ unsigned int i;
+
+ /* If we've already figured out what GP will be, just return it. */
+ *pgp = _bfd_get_gp_value (output_bfd);
+ if (*pgp)
+ return true;
+
+ count = bfd_get_symcount (output_bfd);
+ sym = bfd_get_outsymbols (output_bfd);
+
+ /* The linker script will have created a symbol named `_gp' with the
+ appropriate value. */
+ if (sym == (asymbol **) NULL)
+ i = count;
+ else
+ {
+ for (i = 0; i < count; i++, sym++)
+ {
+ register CONST char *name;
+
+ name = bfd_asymbol_name (*sym);
+ if (*name == '_' && strcmp (name, "_gp") == 0)
+ {
+ *pgp = bfd_asymbol_value (*sym);
+ _bfd_set_gp_value (output_bfd, *pgp);
+ break;
+ }
+ }
+ }
+
+ if (i >= count)
+ {
+ /* Only get the error once. */
+ *pgp = 4;
+ _bfd_set_gp_value (output_bfd, *pgp);
+ return false;
+ }
+
+ return true;
+}
+
/* We have to figure out the gp value, so that we can adjust the
symbol value correctly. We look up the symbol _gp in the output
BFD. If we can't find it, we're stuck. We cache it in the ELF
@@ -1137,42 +1273,11 @@ mips_elf_final_gp (output_bfd, symbol, r
*pgp = symbol->section->output_section->vma + 0x4000;
_bfd_set_gp_value (output_bfd, *pgp);
}
- else
+ else if (!mips_elf_assign_gp (output_bfd, pgp))
{
- unsigned int count;
- asymbol **sym;
- unsigned int i;
-
- count = bfd_get_symcount (output_bfd);
- sym = bfd_get_outsymbols (output_bfd);
-
- if (sym == (asymbol **) NULL)
- i = count;
- else
- {
- for (i = 0; i < count; i++, sym++)
- {
- register CONST char *name;
-
- name = bfd_asymbol_name (*sym);
- if (*name == '_' && strcmp (name, "_gp") == 0)
- {
- *pgp = bfd_asymbol_value (*sym);
- _bfd_set_gp_value (output_bfd, *pgp);
- break;
- }
- }
- }
-
- if (i >= count)
- {
- /* Only get the error once. */
- *pgp = 4;
- _bfd_set_gp_value (output_bfd, *pgp);
- *error_message =
- (char *) _("GP relative relocation when _gp not defined");
- return bfd_reloc_dangerous;
- }
+ *error_message =
+ (char *) _("GP relative relocation when _gp not defined");
+ return bfd_reloc_dangerous;
}
}
@@ -2946,7 +3051,8 @@ _bfd_mips_elf_symbol_processing (abfd, a
case SHN_COMMON:
/* Common symbols less than the GP size are automatically
treated as SHN_MIPS_SCOMMON symbols. */
- if (asym->value > elf_gp_size (abfd))
+ if (asym->value > elf_gp_size (abfd)
+ || IRIX_COMPAT (abfd) == ict_irix6)
break;
/* Fall through. */
case SHN_MIPS_SCOMMON:
@@ -3518,40 +3624,6 @@ _bfd_mips_elf_find_nearest_line (abfd, s
#define CALL_STUB ".mips16.call."
#define CALL_FP_STUB ".mips16.call.fp."
-/* The MIPS ELF linker needs additional information for each symbol in
- the global hash table. */
-
-struct mips_elf_link_hash_entry
-{
- struct elf_link_hash_entry root;
-
- /* External symbol information. */
- EXTR esym;
-
- /* Number of MIPS_32 or MIPS_REL32 relocs against this symbol. */
- unsigned int mips_32_relocs;
-
- /* The index of the first dynamic relocation (in the .rel.dyn
- section) against this symbol. */
- unsigned int min_dyn_reloc_index;
-
- /* If there is a stub that 32 bit functions should use to call this
- 16 bit function, this points to the section containing the stub. */
- asection *fn_stub;
-
- /* Whether we need the fn_stub; this is set if this symbol appears
- in any relocs other than a 16 bit call. */
- boolean need_fn_stub;
-
- /* If there is a stub that 16 bit functions should use to call this
- 32 bit function, this points to the section containing the stub. */
- asection *call_stub;
-
- /* This is like the call_stub field, but it is used if the function
- being called returns a floating point value. */
- asection *call_fp_stub;
-};
-
/* MIPS ELF linker hash table. */
struct mips_elf_link_hash_table
@@ -3702,7 +3774,8 @@ mips_elf_add_symbol_hook (abfd, info, sy
case SHN_COMMON:
/* Common symbols less than the GP size are automatically
treated as SHN_MIPS_SCOMMON symbols. */
- if (sym->st_size > elf_gp_size (abfd))
+ if (sym->st_size > elf_gp_size (abfd)
+ || IRIX_COMPAT (abfd) == ict_irix6)
break;
/* Fall through. */
case SHN_MIPS_SCOMMON:
@@ -4935,108 +5008,1282 @@ mips_elf_relocate_global_got (input_bfd,
contents + rel->r_offset);
}
-/* Relocate a MIPS ELF section. */
+/* Returns the GOT section for ABFD. */
-static boolean
-mips_elf_relocate_section (output_bfd, info, input_bfd, input_section,
- contents, relocs, local_syms, local_sections)
- bfd *output_bfd;
- struct bfd_link_info *info;
- bfd *input_bfd;
- asection *input_section;
- bfd_byte *contents;
- Elf_Internal_Rela *relocs;
- Elf_Internal_Sym *local_syms;
- asection **local_sections;
+static asection *
+mips_elf_got_section (abfd)
+ bfd *abfd;
{
- Elf_Internal_Shdr *symtab_hdr;
- size_t locsymcount;
- size_t extsymoff;
- asection *sgot, *sreloc, *scpt;
- bfd *dynobj;
- bfd_vma gp;
- Elf_Internal_Rela *rel;
- Elf_Internal_Rela *relend;
- struct mips_got_info *g;
-
- dynobj = elf_hash_table (info)->dynobj;
- symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ return bfd_get_section_by_name (abfd, ".got");
+}
- sgot = NULL;
- sreloc = NULL;
- if (dynobj == NULL || ! SGI_COMPAT (output_bfd))
- scpt = NULL;
- else
- scpt = bfd_get_section_by_name (dynobj, ".compact_rel");
- g = NULL;
+/* Returns the GOT information associated with the link indicated by
+ INFO. If SGOTP is non-NULL, it is filled in with the GOT
+ section. */
- if (elf_bad_symtab (input_bfd))
- {
- locsymcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
- extsymoff = 0;
- }
- else
- {
- locsymcount = symtab_hdr->sh_info;
- extsymoff = symtab_hdr->sh_info;
- }
+static struct mips_got_info *
+mips_elf_got_info (abfd, sgotp)
+ bfd *abfd;
+ asection **sgotp;
+{
+ asection *sgot;
+ struct mips_got_info *g;
- gp = _bfd_get_gp_value (output_bfd);
+ sgot = mips_elf_got_section (abfd);
+ BFD_ASSERT (sgot != NULL);
+ BFD_ASSERT (elf_section_data (sgot) != NULL);
+ g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
+ BFD_ASSERT (g != NULL);
- rel = relocs;
- relend = relocs + input_section->reloc_count;
- for (; rel < relend; rel++)
- {
- int r_type;
- reloc_howto_type *howto;
- unsigned long r_symndx;
- bfd_vma addend;
- struct elf_link_hash_entry *h;
- asection *sec;
- Elf_Internal_Sym *sym;
- struct mips_elf_link_hash_entry *mh;
- int other;
- bfd_reloc_status_type r;
+ if (sgotp)
+ *sgotp = sgot;
+ return g;
+}
- r_type = ELF32_R_TYPE (rel->r_info);
- if (r_type == R_MIPS_GNU_VTINHERIT
- || r_type == R_MIPS_GNU_VTENTRY)
- continue;
- if ((r_type < 0 || r_type >= (int) R_MIPS_max)
- && r_type != R_MIPS16_26
- && r_type != R_MIPS16_GPREL)
- {
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- if (r_type == R_MIPS16_26)
- howto = &elf_mips16_jump_howto;
- else if (r_type == R_MIPS16_GPREL)
- howto = &elf_mips16_gprel_howto;
- else
- howto = elf_mips_howto_table + r_type;
+/* Sign-extend VALUE, which has the indicated number of BITS. */
- if (dynobj != NULL
- && (r_type == R_MIPS_CALL16
- || r_type == R_MIPS_GOT16
- || r_type == R_MIPS_CALL_HI16
- || r_type == R_MIPS_CALL_LO16
- || r_type == R_MIPS_GOT_HI16
- || r_type == R_MIPS_GOT_LO16))
- {
- /* We need the .got section. */
- if (sgot == NULL)
- {
- sgot = bfd_get_section_by_name (dynobj, ".got");
- BFD_ASSERT (sgot != NULL);
- BFD_ASSERT (elf_section_data (sgot) != NULL);
- g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
- BFD_ASSERT (g != NULL);
- }
- }
+static bfd_vma
+mips_elf_sign_extend (value, bits)
+ bfd_vma value;
+ int bits;
+{
+ if (value & (1 << (bits - 1)))
+ /* VALUE is negative. */
+ value |= ((bfd_vma) - 1) << bits;
+
+ return value;
+}
- r_symndx = ELF32_R_SYM (rel->r_info);
+/* Return non-zero if the indicated VALUE has overflowed the maximum
+ range expressable by a signed number with the indicated number of
+ BITS. */
+static boolean
+mips_elf_overflow_p (value, bits)
+ bfd_vma value;
+ int bits;
+{
+ bfd_signed_vma svalue = (bfd_signed_vma) value;
+
+ if (svalue > (1 << (bits - 1)) - 1)
+ /* The value is too big. */
+ return true;
+ else if (svalue < -(1 << (bits - 1)))
+ /* The value is too small. */
+ return true;
+
+ /* All is well. */
+ return false;
+}
+
+/* Calculate the %high function. */
+
+static bfd_vma
+mips_elf_high (value)
+ bfd_vma value;
+{
+ return ((value + 0x8000LL) >> 16) & 0xffff;
+}
+
+/* Calculate the %higher function. */
+
+static bfd_vma
+mips_elf_higher (value)
+ bfd_vma value;
+{
+ return ((value + 0x80008000LL) >> 32) & 0xffff;
+}
+
+/* Calculate the %highest function. */
+
+static bfd_vma
+mips_elf_highest (value)
+ bfd_vma value;
+{
+#ifdef BFD64
+ return ((value + 0x800080008000LL) > 48) & 0xffff;
+#else
+ abort ();
+ return (bfd_vma) -1;
+#endif
+}
+
+/* Returns the GOT index for the global symbol indicated by H. */
+
+static bfd_vma
+mips_elf_global_got_index (abfd, h)
+ bfd *abfd;
+ struct elf_link_hash_entry *h;
+{
+ bfd_vma index;
+ asection *sgot;
+ struct mips_got_info *g;
+
+ g = mips_elf_got_info (abfd, &sgot);
+
+ /* Once we determine the global GOT entry with the lowest dynamic
+ symbol table index, we must put all dynamic symbols with greater
+ indices into the GOT. That makes it easy to calculate the GOT
+ offset. */
+ BFD_ASSERT (h->dynindx >= g->global_gotsym->dynindx);
+ index = (h->dynindx - g->global_gotsym->dynindx + g->local_gotno) * 4;
+ BFD_ASSERT (index < sgot->_raw_size);
+
+ return index;
+}
+
+/* Returns the offset for the entry at the INDEXth position
+ in the GOT. */
+
+static bfd_vma
+mips_elf_got_offset_from_index (dynobj, output_bfd, index)
+ bfd *dynobj;
+ bfd *output_bfd;
+ bfd_vma index;
+{
+ asection *sgot;
+ bfd_vma gp;
+ char *error_message;
+
+ sgot = bfd_get_section_by_name (dynobj, ".got");
+ gp = _bfd_get_gp_value (output_bfd);
+ return (sgot->output_section->vma + sgot->output_offset + index -
+ gp);
+}
+
+/* If H is a symbol that needs a global GOT entry, but has a dynamic
+ symbol table index lower than any we've seen to date, record it for
+ posterity. */
+
+static boolean
+mips_elf_record_global_got_symbol (h, info, g)
+ struct elf_link_hash_entry *h;
+ struct bfd_link_info *info;
+ struct mips_got_info *g;
+{
+ /* A global symbol in the GOT must also be in the dynamic symbol
+ table. */
+ if (h->dynindx == -1
+ && !bfd_elf32_link_record_dynamic_symbol (info, h))
+ return false;
+
+ /* If we've already marked this entry as need GOT space, we don't
+ need to do it again. */
+ if (h->got.offset != (bfd_vma) - 1)
+ return true;
+
+ /* By setting this to a value other than -1, we are indicating that
+ there needs to be a GOT entry for H. */
+ h->got.offset = 0;
+
+ return true;
+}
+
+struct mips_elf_hash_sort_data
+{
+ /* The symbol in the global GOT with the lowest dynamic symbol table
+ index. */
+ struct elf_link_hash_entry *low;
+ /* The least dynamic symbol table index corresponding to a symbol
+ with a GOT entry. */
+ long min_got_dynindx;
+ /* The greatest dynamic symbol table index not corresponding to a
+ symbol without a GOT entry. */
+ long max_non_got_dynindx;
+};
+
+/* If H needs a GOT entry, assign it the highest available dynamic
+ index. Otherwise, assign it the lowest available dynamic
+ index. */
+
+static boolean
+mips_elf_sort_hash_table_f (h, data)
+ struct mips_elf_link_hash_entry *h;
+ PTR data;
+{
+ struct mips_elf_hash_sort_data *hsd
+ = (struct mips_elf_hash_sort_data *) data;
+
+ /* Symbols without dynamic symbol table entries aren't interesting
+ at all. */
+ if (h->root.dynindx == -1)
+ return true;
+
+ if (h->root.got.offset != 0)
+ h->root.dynindx = hsd->max_non_got_dynindx++;
+ else
+ {
+ h->root.dynindx = --hsd->min_got_dynindx;
+ hsd->low = (struct elf_link_hash_entry *) h;
+ }
+
+ return true;
+}
+
+/* Sort the dynamic symbol table so that symbols that need GOT entries
+ appear towards the end. This reduces the amount of GOT space
+ required. */
+
+static boolean
+mips_elf_sort_hash_table (info)
+ struct bfd_link_info *info;
+{
+ struct mips_elf_hash_sort_data hsd;
+ struct mips_got_info *g;
+ bfd *dynobj;
+
+ dynobj = elf_hash_table (info)->dynobj;
+
+ hsd.low = NULL;
+ hsd.min_got_dynindx = elf_hash_table (info)->dynsymcount;
+ hsd.max_non_got_dynindx = 1;
+ mips_elf_link_hash_traverse (((struct mips_elf_link_hash_table *)
+ elf_hash_table (info)),
+ mips_elf_sort_hash_table_f,
+ &hsd);
+
+ /* There shoud have been enough room in the symbol table to
+ accomodate both the GOT and non-GOT symbols. */
+ BFD_ASSERT (hsd.min_got_dynindx == hsd.max_non_got_dynindx);
+
+ /* Now we know which dynamic symbol has the lowest dynamic symbol
+ table index in the GOT. */
+ g = mips_elf_got_info (dynobj, NULL);
+ g->global_gotsym = hsd.low;
+
+ return true;
+}
+
+/* Create a local GOT entry for VALUE. Return the index of the entry,
+ or -1 if it could not be created. */
+
+static bfd_vma
+mips_elf_create_local_got_entry (abfd, g, sgot, value)
+ bfd *abfd;
+ struct mips_got_info *g;
+ asection *sgot;
+ bfd_vma value;
+{
+ if (g->assigned_gotno >= g->local_gotno)
+ {
+ /* We didn't allocate enough space in the GOT. */
+ (*_bfd_error_handler)
+ (_("not enough GOT space for local GOT entries"));
+ bfd_set_error (bfd_error_bad_value);
+ return (bfd_vma) -1;
+ }
+
+ bfd_put_32 (abfd, value, sgot->contents + 4 * g->assigned_gotno);
+ return 4 * g->assigned_gotno++;
+}
+
+/* Returns the GOT offset at which the indicated address can be found.
+ If there is not yet a GOT entry for this value, create one. Returns
+ -1 if no satisfactory GOT offset can be found. */
+
+static bfd_vma
+mips_elf_local_got_index (abfd, info, value)
+ bfd *abfd;
+ struct bfd_link_info *info;
+ bfd_vma value;
+{
+ asection *sgot;
+ struct mips_got_info *g;
+ bfd_byte *entry;
+
+ g = mips_elf_got_info (elf_hash_table (info)->dynobj, &sgot);
+
+ /* Look to see if we already have an appropriate entry. */
+ for (entry = sgot->contents + 4 * MIPS_RESERVED_GOTNO;
+ entry != sgot->contents + 4 * g->assigned_gotno;
+ entry += 4)
+ {
+ bfd_vma address = bfd_get_32 (abfd, entry);
+
+ if (address == value)
+ return entry - sgot->contents;
+ }
+
+ return mips_elf_create_local_got_entry (abfd, g, sgot, value);
+}
+
+/* Find a GOT entry that is within 32KB of the VALUE. These entries
+ are supposed to be placed at small offsets in the GOT, i.e.,
+ within 32KB of GP. Return the index into the GOT for this page,
+ and store the offset from this entry to the desired address in
+ OFFSETP, if it is non-NULL. */
+
+static bfd_vma
+mips_elf_got_page (abfd, info, value, offsetp)
+ bfd *abfd;
+ struct bfd_link_info *info;
+ bfd_vma value;
+ bfd_vma *offsetp;
+{
+ asection *sgot;
+ struct mips_got_info *g;
+ bfd_byte *entry;
+ bfd_byte *last_entry;
+ bfd_vma index;
+ bfd_vma address;
+
+ g = mips_elf_got_info (elf_hash_table (info)->dynobj, &sgot);
+
+ /* Look to see if we aleady have an appropriate entry. */
+ last_entry = sgot->contents + 4 * g->assigned_gotno;
+ for (entry = sgot->contents + 4 * MIPS_RESERVED_GOTNO;
+ entry != last_entry;
+ entry += 4)
+ {
+ address = bfd_get_32 (abfd, entry);
+ if (!mips_elf_overflow_p (value - address, 16))
+ {
+ /* This entry will serve as the page pointer. We can add a
+ 16-bit number to it to get the actual address. */
+ index = entry - sgot->contents;
+ break;
+ }
+ }
+
+ /* If we didn't have an appropriate entry, we create one now. */
+ if (entry == last_entry)
+ index = mips_elf_create_local_got_entry (abfd, g, sgot, value);
+
+ if (offsetp)
+ {
+ address = bfd_get_32 (abfd, entry);
+ *offsetp = value - address;
+ }
+
+ return index;
+}
+
+/* Find a GOT entry whose higher-order 16 bits are the same as those
+ for value. Return the index into the GOT for this entry. */
+
+static bfd_vma
+mips_elf_got16_entry (abfd, info, value)
+ bfd *abfd;
+ struct bfd_link_info *info;
+ bfd_vma value;
+{
+ asection *sgot;
+ struct mips_got_info *g;
+ bfd_byte *entry;
+ bfd_byte *last_entry;
+ bfd_vma index;
+ bfd_vma address;
+
+ value &= 0xffff0000;
+ g = mips_elf_got_info (elf_hash_table (info)->dynobj, &sgot);
+
+ /* Look to see if we already have an appropriate entry. */
+ last_entry = sgot->contents + 4 * g->assigned_gotno;
+ for (entry = sgot->contents + 4 * MIPS_RESERVED_GOTNO;
+ entry != last_entry;
+ entry += 4)
+ {
+ address = bfd_get_32 (abfd, entry);
+ if (address & 0xffff0000 == value)
+ {
+ /* This entry has the right high-order 16 bits. */
+ index = 4 * (entry - sgot->contents);
+ break;
+ }
+ }
+
+ /* If we didn't have an appropriate entry, we create one now. */
+ if (entry == last_entry)
+ index = mips_elf_create_local_got_entry (abfd, g, sgot, value);
+
+ return index;
+}
+
+/* Sets *ADDENDP to the addend for the first R_MIPS_LO16 relocation
+ found, beginning with RELOCATION. RELEND is one-past-the-end of
+ the relocation table. */
+
+static boolean
+mips_elf_next_lo16_addend (relocation, relend, addendp)
+ Elf_Internal_Rela *relocation;
+ Elf_Internal_Rela *relend;
+ bfd_vma *addendp;
+{
+ /* According to the MIPS ELF ABI, the R_MIPS_LO16 relocation must be
+ immediately following. However, for the IRIX6 ABI, the next
+ relocation may be a composed relocation consisting of several
+ relocations for the same address. In that case, the R_MIPS_LO16
+ relo!scation may occur as one of these. We permit a similar
+ extension in general, as that is useful for GCC. */
+ while (relocation < relend)
+ {
+ if (ELF32_R_TYPE (relocation->r_info) == R_MIPS_LO16)
+ {
+ *addendp = relocation->r_addend;
+ return true;
+ }
+
+ ++relocation;
+ }
+
+ /* We didn't find it. */
+ return false;
+}
+
+static unsigned int
+mips_elf_create_dynamic_relocation (output_bfd, info, rel, dynindx,
+ addend, input_section)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ Elf_Internal_Rela *rel;
+ long dynindx;
+ bfd_vma addend;
+ asection *input_section;
+{
+ Elf_Internal_Rel outrel;
+ boolean skip;
+ asection *sreloc;
+ bfd *dynobj;
+ int r_type;
+
+ r_type = ELF32_R_TYPE (rel->r_info);
+ dynobj = elf_hash_table (info)->dynobj;
+ sreloc = bfd_get_section_by_name (dynobj, ".rel.dyn");
+ BFD_ASSERT (sreloc != NULL);
+
+ skip = false;
+
+ /* The symbol for the relocation is the same as it was for the
+ original relocation. */
+ outrel.r_info = ELF32_R_INFO (dynindx, R_MIPS_REL32);
+
+ /* The offset for the dynamic relocation is the same as for the
+ original relocation, adjusted by the offset at which the original
+ section is output. */
+ if (elf_section_data (input_section)->stab_info == NULL)
+ outrel.r_offset = rel->r_offset;
+ else
+ {
+ bfd_vma off;
+
+ off = (_bfd_stab_section_offset
+ (output_bfd, &elf_hash_table (info)->stab_info,
+ input_section,
+ &elf_section_data (input_section)->stab_info,
+ rel->r_offset));
+ if (off == (bfd_vma) -1)
+ skip = true;
+ outrel.r_offset = off;
+ }
+ outrel.r_offset += (input_section->output_section->vma
+ + input_section->output_offset);
+
+ /* If we've decided to skip this relocation, just output an emtpy
+ record. */
+ if (skip)
+ memset (&outrel, 0, sizeof (outrel));
+
+ bfd_elf32_swap_reloc_out (output_bfd, &outrel,
+ (((Elf32_External_Rel *)
+ sreloc->contents)
+ + sreloc->reloc_count));
+ ++sreloc->reloc_count;
+
+ /* Make sure the output section is writable. The dynamic linker
+ will be writing to it. */
+ elf_section_data (input_section->output_section)->this_hdr.sh_flags
+ |= SHF_WRITE;
+
+ /* On IRIX5, make an entry of compact relocation info. */
+ if (! skip && IRIX_COMPAT (output_bfd) == ict_irix5)
+ {
+ asection* scpt = bfd_get_section_by_name (dynobj, ".compact_rel");
+ bfd_byte *cr;
+
+ if (scpt)
+ {
+ Elf32_crinfo cptrel;
+
+ mips_elf_set_cr_format (cptrel, CRF_MIPS_LONG);
+ cptrel.vaddr = (rel->r_offset
+ + input_section->output_section->vma
+ + input_section->output_offset);
+ if (r_type == R_MIPS_REL32)
+ mips_elf_set_cr_type (cptrel, CRT_MIPS_REL32);
+ else
+ mips_elf_set_cr_type (cptrel, CRT_MIPS_WORD);
+ mips_elf_set_cr_dist2to (cptrel, 0);
+ cptrel.konst = addend;
+
+ cr = (scpt->contents
+ + sizeof (Elf32_External_compact_rel));
+ bfd_elf32_swap_crinfo_out (output_bfd, &cptrel,
+ ((Elf32_External_crinfo *) cr
+ + scpt->reloc_count));
+ ++scpt->reloc_count;
+ }
+ }
+
+ return sreloc->reloc_count - 1;
+}
+
+/* Calculate the value produced by the RELOCATION (which comes from
+ the INPUT_BFD). The ADDEND is the addend to use for this
+ RELOCATION; RELOCATION->R_ADDEND is ignored.
+
+ The result of the relocation calculation is stored in VALUEP.
+
+ This function returns bfd_reloc_continue if the caller need take no
+ further action regarding this relocation, bfd_reloc_notsupported if
+ something goes dramatically wrong, bfd_reloc_overflow if an
+ overflow occurs, and bfd_reloc_ok to indicate success. */
+
+static bfd_reloc_status_type
+mips_elf_calculate_relocation (abfd,
+ input_bfd,
+ input_section,
+ info,
+ relocation,
+ addend,
+ howto,
+ relend,
+ local_syms,
+ local_sections,
+ valuep,
+ namep)
+ bfd *abfd;
+ bfd *input_bfd;
+ asection *input_section;
+ struct bfd_link_info *info;
+ Elf_Internal_Rela *relocation;
+ bfd_vma addend;
+ reloc_howto_type *howto;
+ Elf_Internal_Rela *relend;
+ Elf_Internal_Sym *local_syms;
+ asection **local_sections;
+ bfd_vma *valuep;
+ const char **namep;
+{
+ /* The eventual value we will return. */
+ bfd_vma value;
+ /* The address of the symbol against which the relocation is
+ occurring. */
+ bfd_vma symbol = 0;
+ /* The final GP value to be used for the relocatable, executable, or
+ shared object file being produced. */
+ bfd_vma gp = (bfd_vma) - 1;
+ /* The place (section offset or address) of the storage unit being
+ relocated. */
+ bfd_vma p;
+ /* The value of GP used to create the relocatable object. */
+ bfd_vma gp0 = (bfd_vma) - 1;
+ /* The offset into the global offset table at which the address of
+ the relocation entry symbol, adjusted by the addend, resides
+ during execution. */
+ bfd_vma g = (bfd_vma) - 1;
+ /* The section in which the symbol referenced by the relocation is
+ located. */
+ asection *sec = NULL;
+ struct mips_elf_link_hash_entry* h = NULL;
+ unsigned long r_symndx;
+ boolean local_p;
+ boolean gp_disp_p = false;
+ Elf_Internal_Shdr *symtab_hdr;
+ size_t extsymoff;
+ int r_type;
+ boolean overflowed_p;
+
+ /* Parse the relocation. */
+ r_symndx = ELF32_R_SYM (relocation->r_info);
+ r_type = ELF32_R_TYPE (relocation->r_info);
+ p = (input_section->output_section->vma
+ + input_section->output_offset
+ + relocation->r_offset);
+
+ /* Assume that there will be no overflow. */
+ overflowed_p = false;
+
+ /* Figure out whether or not the symbol is local. */
+ symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ if (elf_bad_symtab (input_bfd))
+ {
+ /* The symbol table does not follow the rule that local symbols
+ must come before globals. */
+ extsymoff = 0;
+ local_p = local_sections[r_symndx] != NULL;
+ }
+ else
+ {
+ extsymoff = symtab_hdr->sh_info;
+ local_p = r_symndx < extsymoff;
+ }
+
+ /* Figure out the value of the symbol. */
+ if (local_p)
+ {
+ Elf_Internal_Sym *sym;
+
+ sym = local_syms + r_symndx;
+ sec = local_sections[r_symndx];
+
+ symbol = sec->output_section->vma + sec->output_offset;
+ if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
+ symbol += sym->st_value;
+
+ /* MIPS16 text labels should be treated as odd. */
+ if (sym->st_other == STO_MIPS16)
+ ++symbol;
+
+ /* Record the name of this symbol, for our caller. */
+ *namep = bfd_elf_string_from_elf_section (input_bfd,
+ symtab_hdr->sh_link,
+ sym->st_name);
+ if (*namep = '\0')
+ *namep = bfd_section_name (input_bfd, sec);
+ }
+ else
+ {
+ /* For global symbols we look up the symbol in the hash-table. */
+ h = ((struct mips_elf_link_hash_entry *)
+ elf_sym_hashes (input_bfd) [r_symndx - extsymoff]);
+ /* Find the real hash-table entry for this symbol. */
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct mips_elf_link_hash_entry *) h->root.root.u.i.link;
+
+ /* Record the name of this symbol, for our caller. */
+ *namep = h->root.root.root.string;
+
+ /* See if this is the special _gp_disp symbol. Note that such a
+ symbol must always be a global symbol. */
+ if (strcmp (h->root.root.root.string, "_gp_disp") == 0)
+ {
+ /* Relocations against _gp_disp are permitted only with
+ R_MIPS_HI16 and R_MIPS_LO16 relocations. */
+ if (r_type != R_MIPS_HI16 && r_type != R_MIPS_LO16)
+ return bfd_reloc_notsupported;
+
+ gp_disp_p = true;
+ }
+
+ /* If this symbol is defined, calculate its address. */
+ if ((h->root.root.type == bfd_link_hash_defined
+ || h->root.root.type == bfd_link_hash_defweak)
+ && h->root.root.u.def.section)
+ {
+ sec = h->root.root.u.def.section;
+ if (sec->output_section)
+ symbol = (h->root.root.u.def.value
+ + sec->output_section->vma
+ + sec->output_offset);
+ else
+ symbol = h->root.root.u.def.value;
+ }
+ else
+ {
+ (*info->callbacks->undefined_symbol)
+ (info, h->root.root.root.string, input_bfd,
+ input_section, relocation->r_offset);
+ return bfd_reloc_undefined;
+ }
+ }
+
+ /* If we haven't already determined the GOT offset, or the GP value,
+ and we're going to need it, get it now. */
+ switch (r_type)
+ {
+ case R_MIPS_CALL16:
+ case R_MIPS_GOT_DISP:
+ case R_MIPS_GOT_HI16:
+ case R_MIPS_CALL_HI16:
+ case R_MIPS_GOT_LO16:
+ case R_MIPS_CALL_LO16:
+ /* Find the index into the GOT where this value is located. */
+ if (h)
+ {
+ BFD_ASSERT (addend == 0);
+ g = mips_elf_global_got_index
+ (elf_hash_table (info)->dynobj,
+ (struct elf_link_hash_entry*) h);
+ }
+ else
+ {
+ g = mips_elf_local_got_index (abfd, info, symbol + addend);
+ if (g == (bfd_vma) -1)
+ return false;
+ }
+
+ /* Convert GOT indices to actual offsets. */
+ g = mips_elf_got_offset_from_index (elf_hash_table (info)->dynobj,
+ abfd, g);
+ break;
+
+ case R_MIPS_HI16:
+ case R_MIPS_LO16:
+ case R_MIPS_GPREL16:
+ case R_MIPS_GPREL32:
+ gp0 = _bfd_get_gp_value (input_bfd);
+ gp = _bfd_get_gp_value (abfd);
+ break;
+
+ default:
+ break;
+ }
+
+ /* Figure out what kind of relocation is being performed. */
+ switch (r_type)
+ {
+ case R_MIPS_NONE:
+ return bfd_reloc_continue;
+
+ case R_MIPS_16:
+ value = symbol + mips_elf_sign_extend (addend, 16);
+ overflowed_p = mips_elf_overflow_p (value, 16);
+ break;
+
+ case R_MIPS_32:
+ case R_MIPS_REL32:
+ /* If we're creating a shared library, or this relocation is
+ against a symbol in a shared library, then we can't know
+ where the symbol will end up. So, we create a relocation
+ record in the output, and leave the job up to the dynamic
+ linker. */
+ if (info->shared || !sec->output_section)
+ {
+ unsigned int reloc_index;
+
+ BFD_ASSERT (h != NULL);
+ reloc_index
+ = mips_elf_create_dynamic_relocation (abfd,
+ info,
+ relocation,
+ h->root.dynindx,
+ addend,
+ input_section);
+ if (h->min_dyn_reloc_index == 0
+ || reloc_index < h->min_dyn_reloc_index)
+ h->min_dyn_reloc_index = reloc_index;
+ value = symbol + addend;
+ }
+ else
+ {
+ if (r_type == R_MIPS_32)
+ value = symbol + addend;
+ else
+ value = addend;
+ }
+ value &= howto->dst_mask;
+ break;
+
+ case R_MIPS_26:
+ if (local_p)
+ value = (((addend << 2) | (p & 0xf0000000)) + symbol) >> 2;
+ else
+ value = (mips_elf_sign_extend (addend << 2, 28) + symbol) >> 2;
+ value &= howto->dst_mask;
+ break;
+
+ case R_MIPS_HI16:
+ if (!gp_disp_p)
+ {
+ value = mips_elf_high (addend + symbol);
+ value &= howto->dst_mask;
+ }
+ else
+ {
+ value = mips_elf_high (addend + gp - p);
+ overflowed_p = mips_elf_overflow_p (value, 16);
+ }
+ break;
+
+ case R_MIPS_LO16:
+ if (!gp_disp_p)
+ value = (symbol + addend) & howto->dst_mask;
+ else
+ {
+ value = addend + gp - p + 4;
+ overflowed_p = mips_elf_overflow_p (value, 16);
+ }
+ break;
+
+ case R_MIPS_LITERAL:
+ /* Because we don't merge literal sections, we can handle this
+ just like R_MIPS_GPREL16. In the long run, we should merge
+ shared literals, and then we will need to additional work
+ here. */
+
+ /* Fall through. */
+
+ case R_MIPS_GPREL16:
+ if (local_p)
+ value = mips_elf_sign_extend (addend, 16) + symbol + gp0 - gp;
+ else
+ value = mips_elf_sign_extend (addend, 16) + symbol - gp;
+ overflowed_p = mips_elf_overflow_p (value, 16);
+ break;
+
+ case R_MIPS_GOT16:
+ if (local_p)
+ {
+ value = mips_elf_got16_entry (abfd, info, symbol + addend);
+ if (value == (bfd_vma) -1)
+ return false;
+ value
+ = mips_elf_got_offset_from_index (elf_hash_table (info)->dynobj,
+ abfd,
+ value);
+ overflowed_p = mips_elf_overflow_p (value, 16);
+ break;
+ }
+
+ /* Fall through. */
+
+ case R_MIPS_CALL16:
+ case R_MIPS_GOT_DISP:
+ value = g;
+ overflowed_p = mips_elf_overflow_p (value, 16);
+ break;
+
+ case R_MIPS_GPREL32:
+ value = (addend + symbol + gp0 - gp) & howto->dst_mask;
+ break;
+
+ case R_MIPS_PC16:
+ value = mips_elf_sign_extend (addend, 16) + symbol - p;
+ overflowed_p = mips_elf_overflow_p (value, 16);
+ break;
+
+ case R_MIPS_GOT_HI16:
+ case R_MIPS_CALL_HI16:
+ /* We're allowed to handle these two relocations identically.
+ The dynamic linker is allowed to handle the CALL relocations
+ differently by creating a lazy evaluation stub. */
+ value = g;
+ value = mips_elf_high (value);
+ value &= howto->dst_mask;
+ break;
+
+ case R_MIPS_GOT_LO16:
+ case R_MIPS_CALL_LO16:
+ value = g & howto->dst_mask;
+ break;
+
+ case R_MIPS_64:
+ value = (symbol + addend) & howto->dst_mask;
+ break;
+
+ case R_MIPS_GOT_PAGE:
+ value = mips_elf_got_page (abfd, info, symbol + addend, NULL);
+ if (value == (bfd_vma) -1)
+ return false;
+ value = mips_elf_got_offset_from_index (elf_hash_table (info)->dynobj,
+ abfd,
+ value);
+ overflowed_p = mips_elf_overflow_p (value, 16);
+ break;
+
+ case R_MIPS_GOT_OFST:
+ mips_elf_got_page (abfd, info, symbol + addend, &value);
+ overflowed_p = mips_elf_overflow_p (value, 16);
+ break;
+
+ case R_MIPS_SUB:
+ value = symbol - addend;
+ value &= howto->dst_mask;
+ break;
+
+ case R_MIPS_HIGHER:
+ value = mips_elf_higher (addend + symbol);
+ value &= howto->dst_mask;
+ break;
+
+ case R_MIPS_HIGHEST:
+ value = mips_elf_highest (addend + symbol);
+ value &= howto->dst_mask;
+ break;
+
+ case R_MIPS_SCN_DISP:
+ value = symbol + addend - sec->output_offset;
+ value &= howto->dst_mask;
+ break;
+
+ case R_MIPS_PJUMP:
+ case R_MIPS_JALR:
+ /* Both of these may be ignored. R_MIPS_JALR is an optimization
+ hint; we could improve performance by honoring that hint. */
+ return bfd_reloc_continue;
+
+ case R_MIPS_GNU_VTINHERIT:
+ case R_MIPS_GNU_VTENTRY:
+ /* We don't do anything with these at present. */
+ return bfd_reloc_continue;
+
+ case R_MIPS16_26:
+ case R_MIPS16_GPREL:
+ /* These relocations, used for MIPS16, are not clearly
+ documented anywhere. What do they do? */
+ return bfd_reloc_notsupported;
+
+ default:
+ /* An unrecognized relocation type. */
+ return bfd_reloc_notsupported;
+ }
+
+ /* Store the VALUE for our caller. */
+ *valuep = value;
+ return overflowed_p ? bfd_reloc_overflow : bfd_reloc_ok;
+}
+
+/* Obtain the field relocated by RELOCATION. */
+
+static bfd_vma
+mips_elf_obtain_contents (howto, relocation, input_bfd, contents)
+ reloc_howto_type *howto;
+ Elf_Internal_Rela *relocation;
+ bfd *input_bfd;
+ bfd_byte *contents;
+{
+ bfd_vma x;
+ bfd_byte *location = contents + relocation->r_offset;
+
+ switch (bfd_get_reloc_size (howto))
+ {
+ case 0:
+ x = 0;
+ break;
+
+ case 1:
+ x = bfd_get_8 (input_bfd, location);
+ break;
+
+ case 2:
+ x = bfd_get_16 (input_bfd, location);
+ break;
+
+ case 4:
+ x = bfd_get_32 (input_bfd, location);
+ break;
+
+ case 8:
+#ifdef BFD64
+ x = bfd_get_64 (input_bfd, location);
+#else
+ abort ();
+#endif
+ break;
+
+ default:
+ abort ();
+ break;
+ }
+
+ return x;
+}
+
+/* It has been determined that the result of the RELOCATION is the
+ VALUE. Use HOWTO to place VALUE into the output file at the
+ appropriate position. The SECTION is the section to which the
+ relocatin applies.
+
+ Returns false if anything goes wrong. */
+
+static void
+mips_elf_perform_relocation (howto, relocation, value, input_bfd, contents)
+ reloc_howto_type *howto;
+ Elf_Internal_Rela *relocation;
+ bfd_vma value;
+ bfd *input_bfd;
+ bfd_byte *contents;
+{
+ bfd_vma x;
+ bfd_byte *location = contents + relocation->r_offset;
+
+ /* Obtain the current value. */
+ x = mips_elf_obtain_contents (howto, relocation, input_bfd, contents);
+
+ /* Clear the field we are setting. */
+ x &= ~howto->dst_mask;
+
+ /* Set the field. */
+ x |= (value & howto->dst_mask);
+
+ /* Put the value into the output. */
+ switch (bfd_get_reloc_size (howto))
+ {
+ case 0:
+ x = 0;
+ break;
+
+ case 1:
+ bfd_put_8 (input_bfd, x, location);
+ break;
+
+ case 2:
+ bfd_put_16 (input_bfd, x, location);
+ break;
+
+ case 4:
+ bfd_put_32 (input_bfd, x, location);
+ break;
+
+ case 8:
+#ifdef BFD64
+ bfd_put_64 (input_bfd, x, location);
+#else
+ abort ();
+#endif
+ break;
+
+ default:
+ abort ();
+ break;
+ }
+}
+
+/* Relocate a MIPS ELF section. */
+
+static boolean
+mips_elf_relocate_section (output_bfd, info, input_bfd, input_section,
+ contents, relocs, local_syms, local_sections)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ bfd *input_bfd;
+ asection *input_section;
+ bfd_byte *contents;
+ Elf_Internal_Rela *relocs;
+ Elf_Internal_Sym *local_syms;
+ asection **local_sections;
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ size_t locsymcount;
+ size_t extsymoff;
+ asection *sgot, *sreloc, *scpt;
+ bfd *dynobj;
+ bfd_vma gp;
+ Elf_Internal_Rela *rel;
+ Elf_Internal_Rela *relend;
+ struct mips_got_info *g;
+ bfd_vma addend;
+ bfd_vma last_hi16_addend;
+ boolean next_relocation_for_same_address_p = false;
+ boolean use_saved_addend_p = false;
+ boolean last_hi16_addend_valid_p = false;
+
+ dynobj = elf_hash_table (info)->dynobj;
+ symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+
+ sgot = NULL;
+ sreloc = NULL;
+ if (dynobj == NULL || ! SGI_COMPAT (output_bfd))
+ scpt = NULL;
+ else
+ scpt = bfd_get_section_by_name (dynobj, ".compact_rel");
+ g = NULL;
+
+ if (elf_bad_symtab (input_bfd))
+ {
+ locsymcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
+ extsymoff = 0;
+ }
+ else
+ {
+ locsymcount = symtab_hdr->sh_info;
+ extsymoff = symtab_hdr->sh_info;
+ }
+
+ gp = _bfd_get_gp_value (output_bfd);
+ relend = relocs + input_section->reloc_count;
+
+ for (rel = relocs; rel < relend; ++rel)
+ {
+ const char *name;
+ bfd_vma value;
+ int result;
+ reloc_howto_type *howto;
+
+ /* Find the relocation howto for this relocation. */
+ howto = elf_mips_howto_table + ELF32_R_TYPE (rel->r_info);
+
+ if (!use_saved_addend_p)
+ {
+ Elf_Internal_Shdr *rel_hdr;
+
+ /* If these relocations were originally of the REL variety,
+ we must pull the addend out of the field that will be
+ relocated. Otherwise, we simply use the contents of the
+ RELA relocation. To determine which flavor or relocation
+ this is, we depend on the fact that the INPUT_SECTION's
+ REL_HDR is read before its REL_HDR2. */
+ rel_hdr = &elf_section_data (input_section)->rel_hdr;
+ if (rel - relocs >= rel_hdr->sh_size / rel_hdr->sh_entsize)
+ rel_hdr = elf_section_data (input_section)->rel_hdr2;
+ if (rel_hdr->sh_entsize == sizeof (Elf32_External_Rel))
+ {
+ int r_type = ELF32_R_TYPE (rel->r_info);
+
+ addend = mips_elf_obtain_contents (howto,
+ rel,
+ input_bfd,
+ contents);
+ addend &= howto->src_mask;
+
+ /* For some kinds of relocations, the ADDEND is a
+ combination of the addend stored in two different
+ relocations. */
+ if (r_type == R_MIPS_HI16 || r_type == R_MIPS_GOT16)
+ {
+ /* Scan ahead to find a matching R_MIPS_LO16
+ relocation. */
+ bfd_vma l;
+
+ if (!mips_elf_next_lo16_addend (rel, relend, &l))
+ return false;
+
+ /* Save the high-order bit for later. When we
+ encounter the R_MIPS_LO16 relocation we will need
+ them again. */
+ addend <<= 16;
+ last_hi16_addend = addend;
+ last_hi16_addend_valid_p = true;
+
+ /* Compute the combined addend. */
+ addend |= l;
+ }
+ else if (r_type == R_MIPS_LO16)
+ {
+ /* Used the saved HI16 addend. */
+ if (!last_hi16_addend_valid_p)
+ return false;
+ addend |= last_hi16_addend;
+ }
+ }
+ else
+ addend = rel->r_addend;
+ }
+
+ /* In the N32 and 64-bit ABIs there may be multiple consecutive
+ relocations for the same offset. In that case we are
+ supposed to treat the output of each relocation as the addend
+ for the next. */
+ if (rel + 1 < relend && rel->r_offset == (rel + 1)->r_offset)
+ use_saved_addend_p = true;
+ else
+ use_saved_addend_p = false;
+
+ /* Figure out what value we are supposed to relocate. */
+ switch (mips_elf_calculate_relocation (output_bfd,
+ input_bfd,
+ input_section,
+ info,
+ rel,
+ addend,
+ howto,
+ relend,
+ local_syms,
+ local_sections,
+ &value,
+ &name))
+ {
+ case bfd_reloc_continue:
+ /* There's nothing to do. */
+ continue;
+
+ case bfd_reloc_undefined:
+ return false;
+
+ case bfd_reloc_notsupported:
+ abort ();
+ break;
+
+ case bfd_reloc_overflow:
+ if (use_saved_addend_p)
+ /* Ignore overflow until we reach the last relocation for
+ a given location. */
+ ;
+ else if (!name
+ || ! ((*info->callbacks->reloc_overflow)
+ (info, name, howto->name, (bfd_vma) 0,
+ input_bfd, input_section, rel->r_offset)))
+ return false;
+
+ break;
+
+ case bfd_reloc_ok:
+ break;
+
+ default:
+ abort ();
+ break;
+ }
+
+ /* If we've got another relocation for the address, keep going
+ until we reach the last one. */
+ if (use_saved_addend_p)
+ {
+ addend = value;
+ continue;
+ }
+
+ /* Actually perform the relocation. */
+ mips_elf_perform_relocation (howto, rel, value, input_bfd,
+ contents);
+ }
+
+ return true;
+#if 0
+ rel = relocs;
+ for (; rel < relend; rel++)
+ {
+ int r_type;
+ reloc_howto_type *howto;
+ unsigned long r_symndx;
+ bfd_vma addend;
+ struct elf_link_hash_entry *h;
+ asection *sec;
+ Elf_Internal_Sym *sym;
+ struct mips_elf_link_hash_entry *mh;
+ int other;
+ bfd_reloc_status_type r;
+
+ r_type = ELF32_R_TYPE (rel->r_info);
+ if (r_type == R_MIPS_GNU_VTINHERIT
+ || r_type == R_MIPS_GNU_VTENTRY)
+ continue;
+ if ((r_type < 0 || r_type >= (int) R_MIPS_max)
+ && r_type != R_MIPS16_26
+ && r_type != R_MIPS16_GPREL)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+ if (r_type == R_MIPS16_26)
+ howto = &elf_mips16_jump_howto;
+ else if (r_type == R_MIPS16_GPREL)
+ howto = &elf_mips16_gprel_howto;
+ else
+ howto = elf_mips_howto_table + r_type;
+
+ if (dynobj != NULL
+ && (r_type == R_MIPS_CALL16
+ || r_type == R_MIPS_GOT16
+ || r_type == R_MIPS_CALL_HI16
+ || r_type == R_MIPS_CALL_LO16
+ || r_type == R_MIPS_GOT_HI16
+ || r_type == R_MIPS_GOT_LO16))
+ {
+ /* We need the .got section. */
+ if (sgot == NULL)
+ {
+ sgot = bfd_get_section_by_name (dynobj, ".got");
+ BFD_ASSERT (sgot != NULL);
+ BFD_ASSERT (elf_section_data (sgot) != NULL);
+ g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
+ BFD_ASSERT (g != NULL);
+ }
+ }
+
+ r_symndx = ELF32_R_SYM (rel->r_info);
+
/* Mix in the change in GP address for a GP relative reloc. */
if (r_type != R_MIPS_GPREL16
&& r_type != R_MIPS_LITERAL
@@ -5843,6 +7090,7 @@ mips_elf_relocate_section (output_bfd, i
}
return true;
+#endif
}
/* This hook function is called before the linker writes out a global
@@ -5915,16 +7163,17 @@ mips_elf_create_dynamic_sections (abfd,
return false;
/* Create .stub section. */
- if (bfd_get_section_by_name (abfd, ".stub") == NULL)
+ if (bfd_get_section_by_name (abfd,
+ MIPS_ELF_STUB_SECTION_NAME (abfd)) == NULL)
{
- s = bfd_make_section (abfd, ".stub");
+ s = bfd_make_section (abfd, MIPS_ELF_STUB_SECTION_NAME (abfd));
if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags)
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_CODE)
|| ! bfd_set_section_alignment (abfd, s, 2))
return false;
}
- if (SGI_COMPAT (abfd)
+ if (IRIX_COMPAT (abfd) == ict_irix5
&& !info->shared
&& bfd_get_section_by_name (abfd, ".rld_map") == NULL)
{
@@ -6101,7 +7350,7 @@ mips_elf_create_got_section (abfd, info)
sizeof (struct mips_got_info));
if (g == NULL)
return false;
- g->global_gotsym = 0;
+ g->global_gotsym = NULL;
g->local_gotno = MIPS_RESERVED_GOTNO;
g->assigned_gotno = MIPS_RESERVED_GOTNO;
if (elf_section_data (s) == NULL)
@@ -6112,6 +7361,8 @@ mips_elf_create_got_section (abfd, info)
return false;
}
elf_section_data (s)->tdata = (PTR) g;
+ elf_section_data (s)->this_hdr.sh_flags
+ |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL;
return true;
}
@@ -6354,9 +7605,11 @@ mips_elf_check_relocs (abfd, info, sec,
for (rel = relocs; rel < rel_end; rel++)
{
unsigned long r_symndx;
+ int r_type;
struct elf_link_hash_entry *h;
r_symndx = ELF32_R_SYM (rel->r_info);
+ r_type = ELF32_R_TYPE (rel->r_info);
if (r_symndx < extsymoff)
h = NULL;
@@ -6375,7 +7628,7 @@ mips_elf_check_relocs (abfd, info, sec,
/* Some relocs require a global offset table. */
if (dynobj == NULL || sgot == NULL)
{
- switch (ELF32_R_TYPE (rel->r_info))
+ switch (r_type)
{
case R_MIPS_GOT16:
case R_MIPS_CALL16:
@@ -6387,11 +7640,7 @@ mips_elf_check_relocs (abfd, info, sec,
elf_hash_table (info)->dynobj = dynobj = abfd;
if (! mips_elf_create_got_section (dynobj, info))
return false;
- sgot = bfd_get_section_by_name (dynobj, ".got");
- BFD_ASSERT (sgot != NULL);
- BFD_ASSERT (elf_section_data (sgot) != NULL);
- g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
- BFD_ASSERT (g != NULL);
+ g = mips_elf_got_info (dynobj, &sgot);
break;
case R_MIPS_32:
@@ -6407,13 +7656,28 @@ mips_elf_check_relocs (abfd, info, sec,
}
}
- switch (ELF32_R_TYPE (rel->r_info))
+ if (!h && (r_type == R_MIPS_CALL_LO16
+ || r_type == R_MIPS_GOT_LO16
+ || r_type == R_MIPS_GOT_DISP))
+ {
+ /* We may need a local GOT entry for this relocation. We
+ don't count R_MIPS_HI16 or R_MIPS_GOT16 relocations
+ because they are always followed by a R_MIPS_LO16
+ relocation for the value. We don't R_MIPS_GOT_PAGE
+ because we can estimate the maximum number of pages
+ needed by looking at the size of the segment.
+
+ This estimation is very conservative since we can merge
+ duplicate entries in the GOT. In order to be less
+ conservative, we could actually build the GOT here,
+ rather than in relocate_section. */
+ g->local_gotno++;
+ sgot->_raw_size += 4;
+ }
+
+ switch (r_type)
{
case R_MIPS_CALL16:
- case R_MIPS_CALL_HI16:
- case R_MIPS_CALL_LO16:
- /* This symbol requires a global offset table entry. */
-
if (h == NULL)
{
(*_bfd_error_handler)
@@ -6421,28 +7685,14 @@ mips_elf_check_relocs (abfd, info, sec,
bfd_get_filename (abfd), (unsigned long) rel->r_offset);
bfd_set_error (bfd_error_bad_value);
return false;
- }
-
- /* Make sure this symbol is output as a dynamic symbol. */
- if (h->dynindx == -1)
- {
- if (! bfd_elf32_link_record_dynamic_symbol (info, h))
- return false;
- }
-
- if (h->got.offset != (bfd_vma) -1)
- {
- /* We have already allocated space in the .got. */
- break;
}
+ /* Fall through. */
- /* Note the index of the first global got symbol in .dynsym. */
- if (g->global_gotsym == 0
- || g->global_gotsym > (unsigned long) h->dynindx)
- g->global_gotsym = h->dynindx;
-
- /* Make this symbol to have the corresponding got entry. */
- h->got.offset = 0;
+ case R_MIPS_CALL_HI16:
+ case R_MIPS_CALL_LO16:
+ /* This symbol requires a global offset table entry. */
+ if (!mips_elf_record_global_got_symbol (h, info, g))
+ return false;
/* We need a stub, not a plt entry for the undefined
function. But we record it as if it needs plt. See
@@ -6455,32 +7705,10 @@ mips_elf_check_relocs (abfd, info, sec,
case R_MIPS_GOT16:
case R_MIPS_GOT_HI16:
case R_MIPS_GOT_LO16:
+ case R_MIPS_GOT_DISP:
/* This symbol requires a global offset table entry. */
-
- if (h != NULL)
- {
- /* Make sure this symbol is output as a dynamic symbol. */
- if (h->dynindx == -1)
- {
- if (! bfd_elf32_link_record_dynamic_symbol (info, h))
- return false;
- }
-
- if (h->got.offset != (bfd_vma) -1)
- {
- /* We have already allocated space in the .got. */
- break;
- }
- /* Note the index of the first global got symbol in
- .dynsym. */
- if (g->global_gotsym == 0
- || g->global_gotsym > (unsigned long) h->dynindx)
- g->global_gotsym = h->dynindx;
-
- /* Make this symbol to be the global got symbol. */
- h->got.offset = 0;
- }
-
+ if (h && !mips_elf_record_global_got_symbol (h, info, g))
+ return false;
break;
case R_MIPS_32:
@@ -6532,6 +7760,13 @@ mips_elf_check_relocs (abfd, info, sec,
hmips = (struct mips_elf_link_hash_entry *) h;
++hmips->mips_32_relocs;
}
+
+ /* Even though we don't directly need a GOT entry for
+ this symbol, a symbol must have a dynamic symbol
+ table index greater that DT_GOTSYM if there are
+ dynamic relocations against it. */
+ if (!mips_elf_record_global_got_symbol (h, info, g))
+ return false;
}
if (SGI_COMPAT (abfd))
@@ -6571,7 +7806,7 @@ mips_elf_check_relocs (abfd, info, sec,
symbol, then we will need the fn_stub if there is one.
References from a stub section do not count. */
if (h != NULL
- && ELF32_R_TYPE (rel->r_info) != R_MIPS16_26
+ && r_type != R_MIPS16_26
&& strncmp (bfd_get_section_name (abfd, sec), FN_STUB,
sizeof FN_STUB - 1) != 0
&& strncmp (bfd_get_section_name (abfd, sec), CALL_STUB,
@@ -6874,7 +8109,6 @@ mips_elf_size_dynamic_sections (output_b
bfd *dynobj;
asection *s;
boolean reltext;
- asection *sgot;
struct mips_got_info *g;
dynobj = elf_hash_table (info)->dynobj;
@@ -6890,42 +8124,10 @@ mips_elf_size_dynamic_sections (output_b
s->_raw_size
= strlen (ELF_DYNAMIC_INTERPRETER (output_bfd)) + 1;
s->contents
- = (unsigned char *) ELF_DYNAMIC_INTERPRETER (output_bfd);
+ = (bfd_byte *) ELF_DYNAMIC_INTERPRETER (output_bfd);
}
}
- /* Recompute the size of .got for local entires (reserved and
- hipages) if needed. To estimate it, get the upper bound of total
- size of loadable sections. */
- sgot = bfd_get_section_by_name (dynobj, ".got");
-
- if (sgot != NULL)
- {
- bfd_size_type loadable_size = 0;
- bfd_size_type local_gotno;
- struct _bfd *sub;
-
- BFD_ASSERT (elf_section_data (sgot) != NULL);
- g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
- BFD_ASSERT (g != NULL);
-
- for (sub = info->input_bfds; sub; sub = sub->link_next)
- for (s = sub->sections; s != NULL; s = s->next)
- {
- if ((s->flags & SEC_ALLOC) == 0)
- continue;
- loadable_size += (s->_raw_size + 0xf) & ~0xf;
- }
-
- loadable_size += MIPS_FUNCTION_STUB_SIZE;
-
- /* Assume there are two loadable segments consisting of
- contiguous sections. Is 5 enough? */
- local_gotno = (loadable_size >> 16) + 5 + MIPS_RESERVED_GOTNO;
- g->local_gotno = local_gotno;
- sgot->_raw_size += local_gotno * 4;
- }
-
/* The check_relocs and adjust_dynamic_symbol entry points have
determined the sizes of the various dynamic sections. Allocate
memory for them. */
@@ -6988,15 +8190,47 @@ mips_elf_size_dynamic_sections (output_b
else if (strncmp (name, ".got", 4) == 0)
{
int i;
+ bfd_size_type loadable_size = 0;
+ bfd_size_type local_gotno;
+ struct _bfd *sub;
- BFD_ASSERT (elf_section_data (s) != NULL);
+ BFD_ASSERT (elf_section_data (s) != NULL);
g = (struct mips_got_info *) elf_section_data (s)->tdata;
- BFD_ASSERT (g != NULL);
+ BFD_ASSERT (g != NULL);
- /* Fix the size of .got section for the correspondence of
- global symbols and got entries. This adds some useless
- got entries. Is this required by ABI really? */
- i = elf_hash_table (info)->dynsymcount - g->global_gotsym;
+ /* Calculate the total loadable size of the output. That
+ will give us the maximum number of GOT_PAGE entries
+ required. */
+ for (sub = info->input_bfds; sub; sub = sub->link_next)
+ {
+ asection *subsection;
+
+ for (subsection = sub->sections;
+ subsection;
+ subsection = subsection->next)
+ {
+ if ((subsection->flags & SEC_ALLOC) == 0)
+ continue;
+ loadable_size += (subsection->_raw_size + 0xf) & ~0xf;
+ }
+ }
+ loadable_size += MIPS_FUNCTION_STUB_SIZE;
+
+ /* Assume there are two loadable segments consisting of
+ contiguous sections. Is 5 enough? */
+ local_gotno = (loadable_size >> 16) + 5;
+ g->local_gotno += local_gotno;
+ s->_raw_size += local_gotno * 4;
+
+ /* There has to be a global GOT entry for every symbol with
+ a dynamic symbol table index of DT_MIPS_GOTSYM or
+ higher. Therefore, it make sense to put those symbols
+ that need GOT entries at the end of the symbol table. We
+ do that here. */
+ if (!mips_elf_sort_hash_table (info))
+ return false;
+
+ i = elf_hash_table (info)->dynsymcount - g->global_gotsym->dynindx;
s->_raw_size += i * 4;
}
else if (strcmp (name, MIPS_ELF_STUB_SECTION_NAME (output_bfd)) == 0)
@@ -7139,18 +8373,15 @@ mips_elf_size_dynamic_sections (output_b
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_GOTSYM, 0))
return false;
- if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_HIPAGENO, 0))
+ if (IRIX_COMPAT (dynobj) == ict_irix5
+ && ! bfd_elf32_add_dynamic_entry (info, DT_MIPS_HIPAGENO, 0))
return false;
-
-#if 0 /* (SGI_COMPAT) */
- if (! bfd_get_section_by_name (dynobj, ".init"))
- if (! bfd_elf32_add_dynamic_entry (info, DT_INIT, 0))
- return false;
- if (! bfd_get_section_by_name (dynobj, ".fini"))
- if (! bfd_elf32_add_dynamic_entry (info, DT_FINI, 0))
- return false;
-#endif
+ if (IRIX_COMPAT (dynobj) == ict_irix6
+ && (bfd_get_section_by_name
+ (dynobj, MIPS_ELF_OPTIONS_SECTION_NAME (dynobj)))
+ && !bfd_elf32_add_dynamic_entry (info, DT_MIPS_OPTIONS, 0))
+ return false;
if (bfd_get_section_by_name (dynobj,
MIPS_ELF_MSYM_SECTION_NAME (dynobj))
@@ -7221,25 +8452,62 @@ mips_elf_size_dynamic_sections (output_b
}
}
}
-
- if (sgot != NULL)
- {
- BFD_ASSERT (elf_section_data (sgot) != NULL);
- g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
- BFD_ASSERT (g != NULL);
-
- /* If there are no global got symbols, fake the last symbol so
- for safety. */
- if (g->global_gotsym)
- g->global_gotsym += c;
- else
- g->global_gotsym = elf_hash_table (info)->dynsymcount - 1;
- }
}
return true;
}
+/* If NAME is one of the special IRIX6 symbols defined by the linker,
+ adjust it appropriately now. */
+
+static void
+mips_elf_irix6_finish_dynamic_symbol (abfd, name, sym)
+ bfd *abfd;
+ const char *name;
+ Elf_Internal_Sym *sym;
+{
+ /* The linker script takes care of providing names and values for
+ these, but we must place them into the right sections. */
+ static const char* text_section_symbols[] = {
+ "_ftext",
+ "_etext",
+ "__dso_displacement",
+ "__elf_header",
+ "__program_header_table",
+ NULL
+ };
+
+ static const char* data_section_symbols[] = {
+ "_fdata",
+ "_edata",
+ "_end",
+ "_fbss",
+ NULL
+ };
+
+ const char* const *p;
+ int i;
+
+ for (i = 0; i < 2; ++i)
+ for (p = (i == 0) ? text_section_symbols : data_section_symbols;
+ *p;
+ ++p)
+ if (strcmp (*p, name) == 0)
+ {
+ /* All of these symbols are given type STT_SECTION by the
+ IRIX6 linker. */
+ sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
+
+ /* The IRIX linker puts these symbols in special sections. */
+ if (i == 0)
+ sym->st_shndx = SHN_MIPS_TEXT;
+ else
+ sym->st_shndx = SHN_MIPS_DATA;
+
+ break;
+ }
+}
+
/* Finish up dynamic symbol handling. We set the contents of various
dynamic sections here. */
@@ -7313,19 +8581,25 @@ mips_elf_finish_dynamic_symbol (output_b
g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
BFD_ASSERT (g != NULL);
- if ((unsigned long) h->dynindx >= g->global_gotsym)
+ /* Run through the global symbol table, creating GOT entries for all
+ the symbols that need them. */
+ if (h->dynindx >= g->global_gotsym->dynindx)
{
- bfd_size_type offset;
+ bfd_vma offset;
+ bfd_vma value;
- /* This symbol has an entry in the global offset table. Set its
- value to the corresponding got entry, if needed. */
- if (h->got.offset == (bfd_vma) -1)
- {
- offset = (h->dynindx - g->global_gotsym + g->local_gotno) * 4;
- BFD_ASSERT (g->local_gotno * 4 <= offset
- && offset < sgot->_raw_size);
- bfd_put_32 (output_bfd, gval, sgot->contents + offset);
- }
+ if (sym->st_value)
+ value = sym->st_value;
+ else
+ /* For an entity defined in a shared object, this will be
+ NULL. (For functions in shared objects for
+ which we have created stubs, ST_VALUE will be non-NULL.
+ That's because such the functions are now no longer defined
+ in a shared object.) */
+ value = h->root.u.def.value;
+
+ offset = mips_elf_global_got_index (dynobj, h);
+ bfd_put_32 (output_bfd, value, sgot->contents + offset);
}
/* Create a .msym entry, if appropriate. */
@@ -7387,6 +8661,10 @@ mips_elf_finish_dynamic_symbol (output_b
}
}
+ /* Handle the IRIX6-specific symbols. */
+ if (IRIX_COMPAT (output_bfd) == ict_irix6)
+ mips_elf_irix6_finish_dynamic_symbol (output_bfd, name, sym);
+
if (SGI_COMPAT (output_bfd)
&& ! info->shared)
{
@@ -7569,16 +8847,15 @@ mips_elf_finish_dynamic_sections (output
break;
case DT_MIPS_UNREFEXTNO:
-#if 0
- dyn.d_un.d_val = SIZEOF_MIPS_DYNSYM_SECNAMES;
-#else
- dyn.d_un.d_val = bfd_count_sections (output_bfd);
-#endif
+ /* The index into the dynamic symbol table which is the
+ entry of the first external symbol that is not
+ referenced within the same object. */
+ dyn.d_un.d_val = bfd_count_sections (output_bfd) + 1;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
case DT_MIPS_GOTSYM:
- dyn.d_un.d_val = g->global_gotsym;
+ dyn.d_un.d_val = g->global_gotsym->dynindx;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
@@ -7589,6 +8866,13 @@ mips_elf_finish_dynamic_sections (output
case DT_MIPS_RLD_MAP:
dyn.d_un.d_ptr = mips_elf_hash_table (info)->rld_value;
+ bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+ break;
+
+ case DT_MIPS_OPTIONS:
+ s = (bfd_get_section_by_name
+ (output_bfd, MIPS_ELF_OPTIONS_SECTION_NAME (output_bfd)));
+ dyn.d_un.d_ptr = s->vma;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;