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PATCH: Add x86_64 PE+ bigobj format
- From: Tristan Gingold <gingold at adacore dot com>
- To: "binutils at sourceware dot org Development" <binutils at sourceware dot org>
- Date: Wed, 12 Mar 2014 11:40:53 +0100
- Subject: PATCH: Add x86_64 PE+ bigobj format
- Authentication-results: sourceware.org; auth=none
Hello,
the number of sections in the coff format is limited to 2**15. This can be
an issue for big C++ file or big file compiled with -ffunction-section
-fdata-section.
Microsoft has developed a little variation of the PE format that extend
a few fields to support up to 2**31 sections.
This patch adds this new format (currently only for x86_64). gas can
generate this format when invoked with -mbig-obj. It looks difficult
in bfd+gas to automatically switch from normal pe format to big-obj
format in case of too many sections. I am not sure we want that,
given also that MS tools don't do that too.
No regression for x86_64-pc-mingw32, also compiled with --enable-targets=all.
Testcase added.
Ok for trunk ?
Tristan.
bfd/
* peicode.h (pe_ILF_object_p): Adjust, as the version number
has been read.
(pe_bfd_object_p): Also read version number to detect ILF.
* pe-x86_64.c (COFF_WITH_PE_BIGOBJ): Define.
(x86_64pe_bigobj_vec): Define
* coffcode.h (bfd_coff_backend_data): Add _bfd_coff_max_nscns field.
(bfd_coff_max_nscns): New macro.
(coff_compute_section_file_positions): Use unsigned int for
target_index. Compare with bfd_coff_max_nscns.
(bfd_coff_std_swap_table, ticoff0_swap_table, ticoff1_swap_table):
Set a value for _bfd_coff_max_nscns.
(header_bigobj_classid): New constant.
(coff_bigobj_swap_filehdr_in, coff_bigobj_swap_filehdr_out)
(coff_bigobj_swap_sym_in, coff_bigobj_swap_sym_out)
(coff_bigobj_swap_aux_in, coff_bigobj_swap_aux_out): New
functions.
(bigobj_swap_table): New table.
* libcoff.h: Regenerate.
* coff-sh.c (bfd_coff_small_swap_table): Likewise.
* coff-alpha.c (alpha_ecoff_backend_data): Add value for
_bfd_coff_max_nscns.
* coff-mips.c (mips_ecoff_backend_data): Likewise.
* coff-rs6000.c (bfd_xcoff_backend_data)
(bfd_pmac_xcoff_backend_data): Likewise.
* coff64-rs6000.c (bfd_xcoff_backend_data)
(bfd_xcoff_aix5_backend_data): Likewise.
* targets.c (x86_64pe_bigobj_vec): Declare.
* configure.in (x86_64pe_bigobj_vec): New vector.
* configure: Regenerate.
* config.bfd: Add bigobj object format for Windows targets.
gas/
* config/tc-i386.c (use_big_obj): Declare.
(OPTION_MBIG_OBJ): Define.
(md_longopts): Add -mbig-obj option.
(md_parse_option): Handle it.
(md_show_usage): Display help for this option.
(i386_target_format): Use bigobj for x86-64 if -mbig-obj.
* doc/c-i386.texi: Document the option.
gas/testsuite/
* gas/pe/big-obj.d, gas/pe/big-obj.s: Add test.
* gas/pe/pe.exp: Add test.
include/
* pe.h (struct external_ANON_OBJECT_HEADER_BIGOBJ): Declare.
(FILHSZ_BIGOBJ): Define.
(struct external_SYMBOL_EX): Declare.
(SYMENT_BIGOBJ, SYMESZ_BIGOBJ): Define.
(union external_AUX_SYMBOL_EX): Declare.
(AUXENT_BIGOBJ, AUXESZ_BIGOBJ): Define.
* internal.h (struct internal_filehdr): Change type
of f_nscns.
diff --git a/bfd/coff-alpha.c b/bfd/coff-alpha.c
index a7a977c..8c68b56 100644
--- a/bfd/coff-alpha.c
+++ b/bfd/coff-alpha.c
@@ -2241,7 +2241,7 @@ static const struct ecoff_backend_data alpha_ecoff_backend_data =
alpha_ecoff_swap_filehdr_out, alpha_ecoff_swap_aouthdr_out,
alpha_ecoff_swap_scnhdr_out,
FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, 0, FILNMLEN, TRUE,
- ECOFF_NO_LONG_SECTION_NAMES, 4, FALSE, 2,
+ ECOFF_NO_LONG_SECTION_NAMES, 4, FALSE, 2, 32768,
alpha_ecoff_swap_filehdr_in, alpha_ecoff_swap_aouthdr_in,
alpha_ecoff_swap_scnhdr_in, NULL,
alpha_ecoff_bad_format_hook, _bfd_ecoff_set_arch_mach_hook,
diff --git a/bfd/coff-mips.c b/bfd/coff-mips.c
index 454f89a..3a30d83 100644
--- a/bfd/coff-mips.c
+++ b/bfd/coff-mips.c
@@ -1254,7 +1254,7 @@ static const struct ecoff_backend_data mips_ecoff_backend_data =
mips_ecoff_swap_filehdr_out, mips_ecoff_swap_aouthdr_out,
mips_ecoff_swap_scnhdr_out,
FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, 0, FILNMLEN, TRUE,
- ECOFF_NO_LONG_SECTION_NAMES, 4, FALSE, 2,
+ ECOFF_NO_LONG_SECTION_NAMES, 4, FALSE, 2, 32768,
mips_ecoff_swap_filehdr_in, mips_ecoff_swap_aouthdr_in,
mips_ecoff_swap_scnhdr_in, NULL,
mips_ecoff_bad_format_hook, _bfd_ecoff_set_arch_mach_hook,
diff --git a/bfd/coff-rs6000.c b/bfd/coff-rs6000.c
index 1f976d9..b9845d1 100644
--- a/bfd/coff-rs6000.c
+++ b/bfd/coff-rs6000.c
@@ -4104,6 +4104,7 @@ static const struct xcoff_backend_data_rec bfd_xcoff_backend_data =
3, /* _bfd_coff_default_section_alignment_power */
FALSE, /* _bfd_coff_force_symnames_in_strings */
2, /* _bfd_coff_debug_string_prefix_length */
+ 32768, /* _bfd_coff_max_nscns */
coff_swap_filehdr_in,
coff_swap_aouthdr_in,
coff_swap_scnhdr_in,
@@ -4284,6 +4285,7 @@ static const struct xcoff_backend_data_rec bfd_pmac_xcoff_backend_data =
3, /* _bfd_coff_default_section_alignment_power */
FALSE, /* _bfd_coff_force_symnames_in_strings */
2, /* _bfd_coff_debug_string_prefix_length */
+ 32768, /* _bfd_coff_max_nscns */
coff_swap_filehdr_in,
coff_swap_aouthdr_in,
coff_swap_scnhdr_in,
diff --git a/bfd/coff-sh.c b/bfd/coff-sh.c
index aca2b8b..1bf3f21 100644
--- a/bfd/coff-sh.c
+++ b/bfd/coff-sh.c
@@ -3090,6 +3090,7 @@ static bfd_coff_backend_data bfd_coff_small_swap_table =
#else
2,
#endif
+ 32768,
coff_swap_filehdr_in, coff_swap_aouthdr_in, coff_swap_scnhdr_in,
coff_swap_reloc_in, coff_bad_format_hook, coff_set_arch_mach_hook,
coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook,
diff --git a/bfd/coff64-rs6000.c b/bfd/coff64-rs6000.c
index 0e0f0d4..16f9524 100644
--- a/bfd/coff64-rs6000.c
+++ b/bfd/coff64-rs6000.c
@@ -2541,6 +2541,7 @@ static const struct xcoff_backend_data_rec bfd_xcoff_backend_data =
3, /* _bfd_coff_default_section_alignment_power */
TRUE, /* _bfd_coff_force_symnames_in_strings */
4, /* _bfd_coff_debug_string_prefix_length */
+ 32768, /* _bfd_coff_max_nscns */
coff_swap_filehdr_in,
coff_swap_aouthdr_in,
coff_swap_scnhdr_in,
@@ -2800,6 +2801,7 @@ static const struct xcoff_backend_data_rec bfd_xcoff_aix5_backend_data =
3, /* _bfd_coff_default_section_alignment_power */
TRUE, /* _bfd_coff_force_symnames_in_strings */
4, /* _bfd_coff_debug_string_prefix_length */
+ 32768, /* _bfd_coff_max_nscns */
coff_swap_filehdr_in,
coff_swap_aouthdr_in,
coff_swap_scnhdr_in,
diff --git a/bfd/coffcode.h b/bfd/coffcode.h
index 11e70a5..d6fe39f 100644
--- a/bfd/coffcode.h
+++ b/bfd/coffcode.h
@@ -1393,6 +1393,7 @@ Special entry points for gdb to swap in coff symbol table parts:
. unsigned int _bfd_coff_default_section_alignment_power;
. bfd_boolean _bfd_coff_force_symnames_in_strings;
. unsigned int _bfd_coff_debug_string_prefix_length;
+. unsigned int _bfd_coff_max_nscns;
.
. void (*_bfd_coff_swap_filehdr_in)
. (bfd *, void *, void *);
@@ -1530,6 +1531,9 @@ Special entry points for gdb to swap in coff symbol table parts:
. ((coff_backend_info (abfd)->_bfd_coff_set_long_section_names) (abfd, enable))
.#define bfd_coff_default_section_alignment_power(abfd) \
. (coff_backend_info (abfd)->_bfd_coff_default_section_alignment_power)
+.#define bfd_coff_max_nscns(abfd) \
+. (coff_backend_info (abfd)->_bfd_coff_max_nscns)
+.
.#define bfd_coff_swap_filehdr_in(abfd, i,o) \
. ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
.
@@ -3136,7 +3140,7 @@ coff_compute_section_file_positions (bfd * abfd)
asection *current;
file_ptr sofar = bfd_coff_filhsz (abfd);
bfd_boolean align_adjust;
- int target_index;
+ unsigned int target_index;
#ifdef ALIGN_SECTIONS_IN_FILE
asection *previous = NULL;
file_ptr old_sofar;
@@ -3304,7 +3308,7 @@ coff_compute_section_file_positions (bfd * abfd)
}
#endif /* ! COFF_IMAGE_WITH_PE */
- if (target_index >= 32768)
+ if (target_index >= bfd_coff_max_nscns (abfd))
{
bfd_set_error (bfd_error_file_too_big);
(*_bfd_error_handler)
@@ -5497,6 +5501,7 @@ static bfd_coff_backend_data bfd_coff_std_swap_table ATTRIBUTE_UNUSED =
#else
2,
#endif
+ 32768,
coff_SWAP_filehdr_in, coff_SWAP_aouthdr_in, coff_SWAP_scnhdr_in,
coff_SWAP_reloc_in, coff_bad_format_hook, coff_set_arch_mach_hook,
coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook,
@@ -5537,6 +5542,7 @@ static bfd_coff_backend_data ticoff0_swap_table =
#else
2,
#endif
+ 32768,
coff_SWAP_filehdr_in, coff_SWAP_aouthdr_in, coff_SWAP_scnhdr_in,
coff_SWAP_reloc_in, ticoff0_bad_format_hook, coff_set_arch_mach_hook,
coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook,
@@ -5578,6 +5584,7 @@ static bfd_coff_backend_data ticoff1_swap_table =
#else
2,
#endif
+ 32768,
coff_SWAP_filehdr_in, coff_SWAP_aouthdr_in, coff_SWAP_scnhdr_in,
coff_SWAP_reloc_in, ticoff1_bad_format_hook, coff_set_arch_mach_hook,
coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook,
@@ -5591,6 +5598,253 @@ static bfd_coff_backend_data ticoff1_swap_table =
};
#endif
+#ifdef COFF_WITH_PE_BIGOBJ
+/* The UUID for bigobj files. */
+
+static const char header_bigobj_classid[16] =
+{
+ 0xC7, 0xA1, 0xBA, 0xD1,
+ 0xEE, 0xBA,
+ 0xa9, 0x4b,
+ 0xAF, 0x20,
+ 0xFA, 0xF6, 0x6A, 0xA4, 0xDC, 0xB8
+};
+
+/* Swap routines. */
+
+static void
+coff_bigobj_swap_filehdr_in (bfd * abfd, void * src, void * dst)
+{
+ struct external_ANON_OBJECT_HEADER_BIGOBJ *filehdr_src =
+ (struct external_ANON_OBJECT_HEADER_BIGOBJ *) src;
+ struct internal_filehdr *filehdr_dst = (struct internal_filehdr *) dst;
+
+ filehdr_dst->f_magic = H_GET_16 (abfd, filehdr_src->Machine);
+ filehdr_dst->f_nscns = H_GET_32 (abfd, filehdr_src->NumberOfSections);
+ filehdr_dst->f_timdat = H_GET_32 (abfd, filehdr_src->TimeDateStamp);
+ filehdr_dst->f_symptr =
+ GET_FILEHDR_SYMPTR (abfd, filehdr_src->PointerToSymbolTable);
+ filehdr_dst->f_nsyms = H_GET_32 (abfd, filehdr_src->NumberOfSymbols);
+ filehdr_dst->f_opthdr = 0;
+ filehdr_dst->f_flags = 0;
+
+ /* Check other magic numbers. */
+ if (H_GET_16 (abfd, filehdr_src->Sig1) != IMAGE_FILE_MACHINE_UNKNOWN
+ || H_GET_16 (abfd, filehdr_src->Sig2) != 0xffff
+ || H_GET_16 (abfd, filehdr_src->Version) != 2
+ || memcmp (filehdr_src->ClassID, header_bigobj_classid, 16) != 0)
+ filehdr_dst->f_opthdr = 0xffff;
+
+ /* Note that CLR metadata are ignored. */
+}
+
+static unsigned int
+coff_bigobj_swap_filehdr_out (bfd *abfd, void * in, void * out)
+{
+ struct internal_filehdr *filehdr_in = (struct internal_filehdr *) in;
+ struct external_ANON_OBJECT_HEADER_BIGOBJ *filehdr_out =
+ (struct external_ANON_OBJECT_HEADER_BIGOBJ *) out;
+
+ memset (filehdr_out, 0, sizeof (*filehdr_out));
+
+ H_PUT_16 (abfd, IMAGE_FILE_MACHINE_UNKNOWN, filehdr_out->Sig1);
+ H_PUT_16 (abfd, 0xffff, filehdr_out->Sig2);
+ H_PUT_16 (abfd, 2, filehdr_out->Version);
+ memcpy (filehdr_out->ClassID, header_bigobj_classid, 16);
+ H_PUT_16 (abfd, filehdr_in->f_magic, filehdr_out->Machine);
+ H_PUT_32 (abfd, filehdr_in->f_nscns, filehdr_out->NumberOfSections);
+ H_PUT_32 (abfd, filehdr_in->f_timdat, filehdr_out->TimeDateStamp);
+ PUT_FILEHDR_SYMPTR (abfd, filehdr_in->f_symptr,
+ filehdr_out->PointerToSymbolTable);
+ H_PUT_32 (abfd, filehdr_in->f_nsyms, filehdr_out->NumberOfSymbols);
+
+ return bfd_coff_filhsz (abfd);
+}
+
+static void
+coff_bigobj_swap_sym_in (bfd * abfd, void * ext1, void * in1)
+{
+ SYMENT_BIGOBJ *ext = (SYMENT_BIGOBJ *) ext1;
+ struct internal_syment *in = (struct internal_syment *) in1;
+
+ if (ext->e.e_name[0] == 0)
+ {
+ in->_n._n_n._n_zeroes = 0;
+ in->_n._n_n._n_offset = H_GET_32 (abfd, ext->e.e.e_offset);
+ }
+ else
+ {
+#if SYMNMLEN != E_SYMNMLEN
+#error we need to cope with truncating or extending SYMNMLEN
+#else
+ memcpy (in->_n._n_name, ext->e.e_name, SYMNMLEN);
+#endif
+ }
+
+ in->n_value = H_GET_32 (abfd, ext->e_value);
+ in->n_scnum = H_GET_32 (abfd, ext->e_scnum);
+ in->n_type = H_GET_16 (abfd, ext->e_type);
+ in->n_sclass = H_GET_8 (abfd, ext->e_sclass);
+ in->n_numaux = H_GET_8 (abfd, ext->e_numaux);
+}
+
+static unsigned int
+coff_bigobj_swap_sym_out (bfd * abfd, void * inp, void * extp)
+{
+ struct internal_syment *in = (struct internal_syment *) inp;
+ SYMENT_BIGOBJ *ext = (SYMENT_BIGOBJ *) extp;
+
+ if (in->_n._n_name[0] == 0)
+ {
+ H_PUT_32 (abfd, 0, ext->e.e.e_zeroes);
+ H_PUT_32 (abfd, in->_n._n_n._n_offset, ext->e.e.e_offset);
+ }
+ else
+ {
+#if SYMNMLEN != E_SYMNMLEN
+#error we need to cope with truncating or extending SYMNMLEN
+#else
+ memcpy (ext->e.e_name, in->_n._n_name, SYMNMLEN);
+#endif
+ }
+
+ H_PUT_32 (abfd, in->n_value, ext->e_value);
+ H_PUT_32 (abfd, in->n_scnum, ext->e_scnum);
+
+ H_PUT_16 (abfd, in->n_type, ext->e_type);
+ H_PUT_8 (abfd, in->n_sclass, ext->e_sclass);
+ H_PUT_8 (abfd, in->n_numaux, ext->e_numaux);
+
+ return SYMESZ_BIGOBJ;
+}
+
+static void
+coff_bigobj_swap_aux_in (bfd *abfd,
+ void * ext1,
+ int type,
+ int in_class,
+ int indx,
+ int numaux,
+ void * in1)
+{
+ AUXENT_BIGOBJ *ext = (AUXENT_BIGOBJ *) ext1;
+ union internal_auxent *in = (union internal_auxent *) in1;
+
+ switch (in_class)
+ {
+ case C_FILE:
+ if (numaux > 1)
+ {
+ if (indx == 0)
+ memcpy (in->x_file.x_fname, ext->File.Name,
+ numaux * sizeof (AUXENT_BIGOBJ));
+ }
+ else
+ memcpy (in->x_file.x_fname, ext->File.Name, sizeof (ext->File.Name));
+ break;
+
+ case C_STAT:
+ case C_LEAFSTAT:
+ case C_HIDDEN:
+ if (type == T_NULL)
+ {
+ in->x_scn.x_scnlen = H_GET_32 (abfd, ext->Section.Length);
+ in->x_scn.x_nreloc =
+ H_GET_16 (abfd, ext->Section.NumberOfRelocations);
+ in->x_scn.x_nlinno =
+ H_GET_16 (abfd, ext->Section.NumberOfLinenumbers);
+ in->x_scn.x_checksum = H_GET_32 (abfd, ext->Section.Checksum);
+ in->x_scn.x_associated = H_GET_16 (abfd, ext->Section.Number)
+ | (H_GET_16 (abfd, ext->Section.HighNumber) << 16);
+ in->x_scn.x_comdat = H_GET_8 (abfd, ext->Section.Selection);
+ return;
+ }
+ break;
+
+ default:
+ in->x_sym.x_tagndx.l = H_GET_32 (abfd, ext->Sym.WeakDefaultSymIndex);
+ /* Characteristics is ignored. */
+ break;
+ }
+}
+
+static unsigned int
+coff_bigobj_swap_aux_out (bfd * abfd,
+ void * inp,
+ int type,
+ int in_class,
+ int indx ATTRIBUTE_UNUSED,
+ int numaux ATTRIBUTE_UNUSED,
+ void * extp)
+{
+ union internal_auxent * in = (union internal_auxent *) inp;
+ AUXENT_BIGOBJ *ext = (AUXENT_BIGOBJ *) extp;
+
+ memset (ext, 0, AUXESZ);
+
+ switch (in_class)
+ {
+ case C_FILE:
+ memcpy (ext->File.Name, in->x_file.x_fname, sizeof (ext->File.Name));
+
+ return AUXESZ;
+
+ case C_STAT:
+ case C_LEAFSTAT:
+ case C_HIDDEN:
+ if (type == T_NULL)
+ {
+ H_PUT_32 (abfd, in->x_scn.x_scnlen, ext->Section.Length);
+ H_PUT_16 (abfd, in->x_scn.x_nreloc,
+ ext->Section.NumberOfRelocations);
+ H_PUT_16 (abfd, in->x_scn.x_nlinno,
+ ext->Section.NumberOfLinenumbers);
+ H_PUT_32 (abfd, in->x_scn.x_checksum, ext->Section.Checksum);
+ H_PUT_16 (abfd, in->x_scn.x_associated & 0xffff,
+ ext->Section.Number);
+ H_PUT_16 (abfd, (in->x_scn.x_associated >> 16),
+ ext->Section.HighNumber);
+ H_PUT_8 (abfd, in->x_scn.x_comdat, ext->Section.Selection);
+ return AUXESZ;
+ }
+ break;
+ }
+
+ H_PUT_32 (abfd, in->x_sym.x_tagndx.l, ext->Sym.WeakDefaultSymIndex);
+ H_PUT_32 (abfd, 1, ext->Sym.WeakSearchType);
+
+ return AUXESZ;
+}
+
+static bfd_coff_backend_data bigobj_swap_table =
+{
+ coff_bigobj_swap_aux_in, coff_bigobj_swap_sym_in, coff_SWAP_lineno_in,
+ coff_bigobj_swap_aux_out, coff_bigobj_swap_sym_out,
+ coff_SWAP_lineno_out, coff_SWAP_reloc_out,
+ coff_bigobj_swap_filehdr_out, coff_SWAP_aouthdr_out,
+ coff_SWAP_scnhdr_out,
+ FILHSZ_BIGOBJ, AOUTSZ, SCNHSZ, SYMESZ_BIGOBJ, AUXESZ_BIGOBJ,
+ RELSZ, LINESZ, FILNMLEN_BIGOBJ,
+ TRUE,
+ COFF_DEFAULT_LONG_SECTION_NAMES,
+ COFF_DEFAULT_SECTION_ALIGNMENT_POWER,
+ FALSE,
+ 2,
+ 1U << 31,
+ coff_bigobj_swap_filehdr_in, coff_SWAP_aouthdr_in, coff_SWAP_scnhdr_in,
+ coff_SWAP_reloc_in, coff_bad_format_hook, coff_set_arch_mach_hook,
+ coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook,
+ coff_slurp_symbol_table, symname_in_debug_hook, coff_pointerize_aux_hook,
+ coff_print_aux, coff_reloc16_extra_cases, coff_reloc16_estimate,
+ coff_classify_symbol, coff_compute_section_file_positions,
+ coff_start_final_link, coff_relocate_section, coff_rtype_to_howto,
+ coff_adjust_symndx, coff_link_add_one_symbol,
+ coff_link_output_has_begun, coff_final_link_postscript,
+ bfd_pe_print_pdata /* huh */
+};
+
+#endif /* COFF_WITH_PE_BIGOBJ */
+
#ifndef coff_close_and_cleanup
#define coff_close_and_cleanup _bfd_generic_close_and_cleanup
#endif
diff --git a/bfd/config.bfd b/bfd/config.bfd
index 59b9f64..147954a 100644
--- a/bfd/config.bfd
+++ b/bfd/config.bfd
@@ -676,7 +676,7 @@ case "${targ}" in
;;
x86_64-*-mingw* | x86_64-*-pe | x86_64-*-pep | x86_64-*-cygwin)
targ_defvec=x86_64pe_vec
- targ_selvecs="x86_64pe_vec x86_64pei_vec bfd_elf64_x86_64_vec bfd_elf64_l1om_vec bfd_elf64_k1om_vec i386pe_vec i386pei_vec bfd_elf32_i386_vec"
+ targ_selvecs="x86_64pe_vec x86_64pei_vec x86_64pe_bigobj_vec bfd_elf64_x86_64_vec bfd_elf64_l1om_vec bfd_elf64_k1om_vec i386pe_vec i386pei_vec bfd_elf32_i386_vec"
want64=true
targ_underscore=no
;;
diff --git a/bfd/configure b/bfd/configure
index bef7295..fbf5f44 100755
--- a/bfd/configure
+++ b/bfd/configure
@@ -15453,6 +15453,7 @@ do
i386pei_vec) tb="$tb pei-i386.lo peigen.lo cofflink.lo" ;;
x86_64pe_vec) tb="$tb pe-x86_64.lo pex64igen.lo cofflink.lo"; target_size=64 ;;
x86_64pei_vec) tb="$tb pei-x86_64.lo pex64igen.lo cofflink.lo"; target_size=64 ;;
+ x86_64pe_bigobj_vec) tb="$tb pe-x86_64.lo pex64igen.lo cofflink.lo"; target_size=64 ;;
i860coff_vec) tb="$tb coff-i860.lo cofflink.lo" ;;
icoff_big_vec) tb="$tb coff-i960.lo cofflink.lo" ;;
icoff_little_vec) tb="$tb coff-i960.lo cofflink.lo" ;;
diff --git a/bfd/configure.in b/bfd/configure.in
index da8c6dc..f1ec965 100644
--- a/bfd/configure.in
+++ b/bfd/configure.in
@@ -942,6 +942,7 @@ do
i386pei_vec) tb="$tb pei-i386.lo peigen.lo cofflink.lo" ;;
x86_64pe_vec) tb="$tb pe-x86_64.lo pex64igen.lo cofflink.lo"; target_size=64 ;;
x86_64pei_vec) tb="$tb pei-x86_64.lo pex64igen.lo cofflink.lo"; target_size=64 ;;
+ x86_64pe_bigobj_vec) tb="$tb pe-x86_64.lo pex64igen.lo cofflink.lo"; target_size=64 ;;
i860coff_vec) tb="$tb coff-i860.lo cofflink.lo" ;;
icoff_big_vec) tb="$tb coff-i960.lo cofflink.lo" ;;
icoff_little_vec) tb="$tb coff-i960.lo cofflink.lo" ;;
diff --git a/bfd/libcoff.h b/bfd/libcoff.h
index b5a9852..36c9829 100644
--- a/bfd/libcoff.h
+++ b/bfd/libcoff.h
@@ -736,6 +736,7 @@ typedef struct
unsigned int _bfd_coff_default_section_alignment_power;
bfd_boolean _bfd_coff_force_symnames_in_strings;
unsigned int _bfd_coff_debug_string_prefix_length;
+ unsigned int _bfd_coff_max_nscns;
void (*_bfd_coff_swap_filehdr_in)
(bfd *, void *, void *);
@@ -873,6 +874,9 @@ typedef struct
((coff_backend_info (abfd)->_bfd_coff_set_long_section_names) (abfd, enable))
#define bfd_coff_default_section_alignment_power(abfd) \
(coff_backend_info (abfd)->_bfd_coff_default_section_alignment_power)
+#define bfd_coff_max_nscns(abfd) \
+ (coff_backend_info (abfd)->_bfd_coff_max_nscns)
+
#define bfd_coff_swap_filehdr_in(abfd, i,o) \
((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
diff --git a/bfd/pe-x86_64.c b/bfd/pe-x86_64.c
index 26bb99d..16b13ec 100644
--- a/bfd/pe-x86_64.c
+++ b/bfd/pe-x86_64.c
@@ -27,6 +27,7 @@
#define TARGET_NAME "pe-x86-64"
#define COFF_WITH_PE
#define COFF_WITH_pex64
+#define COFF_WITH_PE_BIGOBJ
#define PCRELOFFSET TRUE
#if defined (USE_MINGW64_LEADING_UNDERSCORES)
#define TARGET_UNDERSCORE '_'
@@ -58,3 +59,56 @@
COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 0 }
#include "coff-x86_64.c"
+
+/* Entry for big object files. */
+
+const bfd_target
+x86_64pe_bigobj_vec =
+{
+ "pe-bigobj-x86-64", /* Name. */
+ bfd_target_coff_flavour,
+ BFD_ENDIAN_LITTLE, /* Data byte order is little. */
+ BFD_ENDIAN_LITTLE, /* Header byte order is little. */
+
+ (HAS_RELOC | EXEC_P | /* Object flags. */
+ HAS_LINENO | HAS_DEBUG |
+ HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED | BFD_COMPRESS | BFD_DECOMPRESS),
+
+ (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags. */
+ | SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY | SEC_DEBUGGING
+ | SEC_CODE | SEC_DATA | SEC_EXCLUDE ),
+
+ TARGET_UNDERSCORE, /* Leading underscore. */
+ '/', /* Ar_pad_char. */
+ 15, /* Ar_max_namelen. */
+ 0, /* match priority. */
+
+ bfd_getl64, bfd_getl_signed_64, bfd_putl64,
+ bfd_getl32, bfd_getl_signed_32, bfd_putl32,
+ bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */
+ bfd_getl64, bfd_getl_signed_64, bfd_putl64,
+ bfd_getl32, bfd_getl_signed_32, bfd_putl32,
+ bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Hdrs. */
+
+ /* Note that we allow an object file to be treated as a core file as well. */
+ { _bfd_dummy_target, amd64coff_object_p, /* BFD_check_format. */
+ bfd_generic_archive_p, amd64coff_object_p },
+ { bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format. */
+ bfd_false },
+ { bfd_false, coff_write_object_contents, /* bfd_write_contents. */
+ _bfd_write_archive_contents, bfd_false },
+
+ BFD_JUMP_TABLE_GENERIC (coff),
+ BFD_JUMP_TABLE_COPY (coff),
+ BFD_JUMP_TABLE_CORE (_bfd_nocore),
+ BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
+ BFD_JUMP_TABLE_SYMBOLS (coff),
+ BFD_JUMP_TABLE_RELOCS (coff),
+ BFD_JUMP_TABLE_WRITE (coff),
+ BFD_JUMP_TABLE_LINK (coff),
+ BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
+
+ NULL,
+
+ &bigobj_swap_table
+};
diff --git a/bfd/peicode.h b/bfd/peicode.h
index 8fd689c..157879b 100644
--- a/bfd/peicode.h
+++ b/bfd/peicode.h
@@ -1077,7 +1077,7 @@ pe_ILF_build_a_bfd (bfd * abfd,
static const bfd_target *
pe_ILF_object_p (bfd * abfd)
{
- bfd_byte buffer[16];
+ bfd_byte buffer[14];
bfd_byte * ptr;
char * symbol_name;
char * source_dll;
@@ -1087,17 +1087,13 @@ pe_ILF_object_p (bfd * abfd)
unsigned int types;
unsigned int magic;
- /* Upon entry the first four buyes of the ILF header have
+ /* Upon entry the first six bytes of the ILF header have
already been read. Now read the rest of the header. */
- if (bfd_bread (buffer, (bfd_size_type) 16, abfd) != 16)
+ if (bfd_bread (buffer, (bfd_size_type) 14, abfd) != 14)
return NULL;
ptr = buffer;
- /* We do not bother to check the version number.
- version = H_GET_16 (abfd, ptr); */
- ptr += 2;
-
machine = H_GET_16 (abfd, ptr);
ptr += 2;
@@ -1251,7 +1247,7 @@ pe_ILF_object_p (bfd * abfd)
static const bfd_target *
pe_bfd_object_p (bfd * abfd)
{
- bfd_byte buffer[4];
+ bfd_byte buffer[6];
struct external_PEI_DOS_hdr dos_hdr;
struct external_PEI_IMAGE_hdr image_hdr;
struct internal_filehdr internal_f;
@@ -1260,15 +1256,18 @@ pe_bfd_object_p (bfd * abfd)
file_ptr offset;
/* Detect if this a Microsoft Import Library Format element. */
+ /* First read the beginning of the header. */
if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
- || bfd_bread (buffer, (bfd_size_type) 4, abfd) != 4)
+ || bfd_bread (buffer, (bfd_size_type) 6, abfd) != 6)
{
if (bfd_get_error () != bfd_error_system_call)
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
- if (H_GET_32 (abfd, buffer) == 0xffff0000)
+ /* Then check the magic and the version (only 0 is supported). */
+ if (H_GET_32 (abfd, buffer) == 0xffff0000
+ && H_GET_16 (abfd, buffer + 4) == 0)
return pe_ILF_object_p (abfd);
if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
diff --git a/bfd/targets.c b/bfd/targets.c
index f502eec..058ab77 100644
--- a/bfd/targets.c
+++ b/bfd/targets.c
@@ -896,6 +896,7 @@ extern const bfd_target w65_vec;
extern const bfd_target we32kcoff_vec;
extern const bfd_target x86_64pe_vec;
extern const bfd_target x86_64pei_vec;
+extern const bfd_target x86_64pe_bigobj_vec;
extern const bfd_target x86_64coff_vec;
extern const bfd_target z80coff_vec;
extern const bfd_target z8kcoff_vec;
@@ -1231,6 +1232,7 @@ static const bfd_target * const _bfd_target_vector[] =
&x86_64coff_vec,
&x86_64pe_vec,
&x86_64pei_vec,
+ &x86_64pe_bigobj_vec,
#endif
&i860coff_vec,
&icoff_big_vec,
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index f6283a6..734935a 100644
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -513,6 +513,11 @@ enum x86_elf_abi
static enum x86_elf_abi x86_elf_abi = I386_ABI;
#endif
+#if defined (TE_PE) || defined (TE_PEP)
+/* Use big object file format. */
+static int use_big_obj = 0;
+#endif
+
/* 1 for intel syntax,
0 if att syntax. */
static int intel_syntax = 0;
@@ -9497,6 +9502,7 @@ const char *md_shortopts = "qn";
#define OPTION_MADD_BND_PREFIX (OPTION_MD_BASE + 15)
#define OPTION_MEVEXLIG (OPTION_MD_BASE + 16)
#define OPTION_MEVEXWIG (OPTION_MD_BASE + 17)
+#define OPTION_MBIG_OBJ (OPTION_MD_BASE + 18)
struct option md_longopts[] =
{
@@ -9523,6 +9529,9 @@ struct option md_longopts[] =
{"madd-bnd-prefix", no_argument, NULL, OPTION_MADD_BND_PREFIX},
{"mevexlig", required_argument, NULL, OPTION_MEVEXLIG},
{"mevexwig", required_argument, NULL, OPTION_MEVEXWIG},
+# if defined (TE_PE) || defined (TE_PEP)
+ {"mbig-obj", no_argument, NULL, OPTION_MBIG_OBJ},
+#endif
{NULL, no_argument, NULL, 0}
};
size_t md_longopts_size = sizeof (md_longopts);
@@ -9804,6 +9813,12 @@ md_parse_option (int c, char *arg)
as_fatal (_("invalid -mevexwig= option: `%s'"), arg);
break;
+# if defined (TE_PE) || defined (TE_PEP)
+ case OPTION_MBIG_OBJ:
+ use_big_obj = 1;
+ break;
+#endif
+
default:
return 0;
}
@@ -9956,6 +9971,10 @@ md_show_usage (FILE *stream)
-mold-gcc support old (<= 2.8.1) versions of gcc\n"));
fprintf (stream, _("\
-madd-bnd-prefix add BND prefix for all valid branches\n"));
+# if defined (TE_PE) || defined (TE_PEP)
+ fprintf (stream, _("\
+ -mbig-obj generate big object files\n"));
+#endif
}
#if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
@@ -9994,7 +10013,10 @@ i386_target_format (void)
#if defined (OBJ_MAYBE_COFF) || defined (OBJ_COFF)
# if defined (TE_PE) || defined (TE_PEP)
case bfd_target_coff_flavour:
- return flag_code == CODE_64BIT ? "pe-x86-64" : "pe-i386";
+ if (flag_code == CODE_64BIT)
+ return use_big_obj ? "pe-bigobj-x86-64" : "pe-x86-64";
+ else
+ return "pe-i386";
# elif defined (TE_GO32)
case bfd_target_coff_flavour:
return "coff-go32";
diff --git a/gas/doc/c-i386.texi b/gas/doc/c-i386.texi
index 18bd96a..1952cee 100644
--- a/gas/doc/c-i386.texi
+++ b/gas/doc/c-i386.texi
@@ -283,6 +283,11 @@ The @code{.att_syntax} and @code{.intel_syntax} directives will take precedent.
This option forces the assembler to add BND prefix to all branches, even
if such prefix was not explicitly specified in the source code.
+@cindex @samp{-mbig-obj} option, x86-64
+@item -mbig-obj
+On x86-64 PE/COFF target this option forces the use of big object file
+format, which allows more than 32768 sections.
+
@end table
@c man end
diff --git a/gas/testsuite/gas/pe/big-obj.d b/gas/testsuite/gas/pe/big-obj.d
new file mode 100644
index 0000000..95ff1d8
--- /dev/null
+++ b/gas/testsuite/gas/pe/big-obj.d
@@ -0,0 +1,11 @@
+#as: -mbig-obj
+#objdump: -h
+#name: PE x64 big obj
+
+.*: *file format pe-bigobj-.*
+
+Sections:
+#...
+5000. \.data\$a49999 .*
+ CONTENTS, ALLOC, LOAD, DATA
+
diff --git a/gas/testsuite/gas/pe/big-obj.s b/gas/testsuite/gas/pe/big-obj.s
new file mode 100644
index 0000000..07edc91
--- /dev/null
+++ b/gas/testsuite/gas/pe/big-obj.s
@@ -0,0 +1,16 @@
+ .file "big-obj.s"
+
+ .irp n,0,1,2,3,4
+ .irp m,0,1,2,3,4,5,6,7,8,9
+ .irp c,0,1,2,3,4,5,6,7,8,9
+ .irp d,0,1,2,3,4,5,6,7,8,9
+ .irp u,0,1,2,3,4,5,6,7,8,9
+ .globl a\n\m\c\d\u
+ .section .data$a\n\m\c\d\u,"w"
+a\n\m\c\d\u :
+ .byte 1
+ .endr
+ .endr
+ .endr
+ .endr
+ .endr
diff --git a/gas/testsuite/gas/pe/pe.exp b/gas/testsuite/gas/pe/pe.exp
index 0b70ee6..c1c5f49 100644
--- a/gas/testsuite/gas/pe/pe.exp
+++ b/gas/testsuite/gas/pe/pe.exp
@@ -48,3 +48,11 @@ if ([istarget "x86_64-*-mingw*"]) then {
run_dump_test "peseh-x64-5"
run_dump_test "peseh-x64-6"
}
+
+# Big obj
+
+
+if ([istarget "x86_64-*-mingw*"]) then {
+ # Currently only supported on x86_64
+ run_dump_test "big-obj"
+}
diff --git a/include/coff/internal.h b/include/coff/internal.h
index 4f99f2f..b34e5c6 100644
--- a/include/coff/internal.h
+++ b/include/coff/internal.h
@@ -73,7 +73,7 @@ struct internal_filehdr
/* Standard coff internal info. */
unsigned short f_magic; /* magic number */
- unsigned short f_nscns; /* number of sections */
+ unsigned int f_nscns; /* number of sections */
long f_timdat; /* time & date stamp */
bfd_vma f_symptr; /* file pointer to symtab */
long f_nsyms; /* number of symtab entries */
diff --git a/include/coff/pe.h b/include/coff/pe.h
index 0093398..3166531 100644
--- a/include/coff/pe.h
+++ b/include/coff/pe.h
@@ -358,6 +358,85 @@ typedef struct
#define IMAGE_WEAK_EXTERN_SEARCH_LIBRARY 2
#define IMAGE_WEAK_EXTERN_SEARCH_ALIAS 3
+/* Bigobj header. */
+struct external_ANON_OBJECT_HEADER_BIGOBJ
+{
+ /* ANON_OBJECT_HEADER_V2 header. */
+ char Sig1[2];
+ char Sig2[2];
+ char Version[2];
+ char Machine[2];
+ char TimeDateStamp[4];
+ char ClassID[16];
+ char SizeOfData[4];
+ char Flags[4];
+ char MetaDataSize[4];
+ char MetaDataOffset[4];
+
+ /* BIGOBJ specific. */
+ char NumberOfSections[4];
+ char PointerToSymbolTable[4];
+ char NumberOfSymbols[4];
+};
+
+#define FILHSZ_BIGOBJ (14 * 4)
+
+struct external_SYMBOL_EX
+{
+ union
+ {
+ char e_name[E_SYMNMLEN];
+
+ struct
+ {
+ char e_zeroes[4];
+ char e_offset[4];
+ } e;
+ } e;
+
+ char e_value[4];
+ char e_scnum[4];
+ char e_type[2];
+ char e_sclass[1];
+ char e_numaux[1];
+} ATTRIBUTE_PACKED ;
+
+#define SYMENT_BIGOBJ struct external_SYMBOL_EX
+#define SYMESZ_BIGOBJ 20
+
+#define FILNMLEN_BIGOBJ 20
+
+union external_AUX_SYMBOL_EX
+{
+ struct
+ {
+ char WeakDefaultSymIndex[4];
+ char WeakSearchType[4];
+ char rgbReserved[12];
+ } Sym;
+
+ struct
+ {
+ char Name[FILNMLEN_BIGOBJ];
+ } File;
+
+ struct
+ {
+ char Length[4]; /* section length */
+ char NumberOfRelocations[2]; /* # relocation entries */
+ char NumberOfLinenumbers[2]; /* # line numbers */
+ char Checksum[4]; /* section COMDAT checksum */
+ char Number[2]; /* COMDAT associated section index */
+ char Selection[1]; /* COMDAT selection number */
+ char bReserved[1];
+ char HighNumber[2]; /* High bits of COMDAT associated sec. */
+ char rgbReserved[2];
+ } Section;
+} ATTRIBUTE_PACKED;
+
+#define AUXENT_BIGOBJ union external_AUX_SYMBOL_EX
+#define AUXESZ_BIGOBJ 20
+
/* .pdata/.xdata defines and structures for x64 PE+ for exception handling. */
/* .pdata in exception directory. */