2016-08-04 Thomas Preud'homme <thomas.preudhomme@arm.com>
bfd/ * bfd-in.h (bfd_elf32_arm_set_target_relocs): Add one parameter. * bfd-in2.h: Regenerate. * elf32-arm.c (struct elf32_arm_link_hash_table): Declare new cmse_implib field. (bfd_elf32_arm_set_target_relocs): Add new parameter to initialize cmse_implib field in struct elf32_arm_link_hash_table. (elf32_arm_filter_cmse_symbols): New function. (elf32_arm_filter_implib_symbols): Likewise. (elf_backend_filter_implib_symbols): Define to elf32_arm_filter_implib_symbols. ld/ * emultempl/armelf.em (cmse_implib): Declare and define this new static variable. (arm_elf_create_output_section_statements): Add new cmse_implib parameter. (OPTION_CMSE_IMPLIB): Define macro. (PARSE_AND_LIST_LONGOPTS): Add entry for new --cmse-implib switch. (PARSE_AND_LIST_OPTIONS): Likewise. (PARSE_AND_LIST_ARGS_CASES): Handle OPTION_CMSE_IMPLIB case. * ld.texinfo (--cmse-implib): Document new option. * testsuite/ld-arm/arm-elf.exp (Secure gateway import library generation): New test. (Secure gateway import library generation: errors): Likewise. * testsuite/ld-arm/cmse-implib.s: New file. * testsuite/ld-arm/cmse-implib-errors.out: Likewise. * testsuite/ld-arm/cmse-implib.rd: Likewise.
This commit is contained in:
Thomas Preud'homme
parent
4ba2ef8fbe
commit
54ddd295b5
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@ -1,3 +1,16 @@
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2016-08-04 Thomas Preud'homme <thomas.preudhomme@arm.com>
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* bfd-in.h (bfd_elf32_arm_set_target_relocs): Add one parameter.
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* bfd-in2.h: Regenerate.
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* elf32-arm.c (struct elf32_arm_link_hash_table): Declare new
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cmse_implib field.
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(bfd_elf32_arm_set_target_relocs): Add new parameter to initialize
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cmse_implib field in struct elf32_arm_link_hash_table.
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(elf32_arm_filter_cmse_symbols): New function.
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(elf32_arm_filter_implib_symbols): Likewise.
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(elf_backend_filter_implib_symbols): Define to
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elf32_arm_filter_implib_symbols.
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2016-08-04 Thomas Preud'homme <thomas.preudhomme@arm.com>
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* elf32-arm.c (CMSE_PREFIX): Define macro.
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@ -902,7 +902,7 @@ extern bfd_boolean bfd_elf32_arm_process_before_allocation
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void bfd_elf32_arm_set_target_relocs
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(bfd *, struct bfd_link_info *, int, char *, int, int, bfd_arm_vfp11_fix,
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bfd_arm_stm32l4xx_fix, int, int, int, int, int);
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bfd_arm_stm32l4xx_fix, int, int, int, int, int, int);
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extern bfd_boolean bfd_elf32_arm_get_bfd_for_interworking
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(bfd *, struct bfd_link_info *);
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@ -909,7 +909,7 @@ extern bfd_boolean bfd_elf32_arm_process_before_allocation
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void bfd_elf32_arm_set_target_relocs
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(bfd *, struct bfd_link_info *, int, char *, int, int, bfd_arm_vfp11_fix,
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bfd_arm_stm32l4xx_fix, int, int, int, int, int);
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bfd_arm_stm32l4xx_fix, int, int, int, int, int, int);
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extern bfd_boolean bfd_elf32_arm_get_bfd_for_interworking
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(bfd *, struct bfd_link_info *);
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@ -3144,6 +3144,10 @@ struct elf32_arm_link_hash_table
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/* True if the target uses REL relocations. */
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int use_rel;
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/* Nonzero if import library must be a secure gateway import library
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as per ARMv8-M Security Extensions. */
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int cmse_implib;
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/* The index of the next unused R_ARM_TLS_DESC slot in .rel.plt. */
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bfd_vma next_tls_desc_index;
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@ -8307,7 +8311,7 @@ bfd_elf32_arm_set_target_relocs (struct bfd *output_bfd,
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bfd_arm_stm32l4xx_fix stm32l4xx_fix,
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int no_enum_warn, int no_wchar_warn,
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int pic_veneer, int fix_cortex_a8,
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int fix_arm1176)
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int fix_arm1176, int cmse_implib)
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{
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struct elf32_arm_link_hash_table *globals;
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@ -8334,6 +8338,7 @@ bfd_elf32_arm_set_target_relocs (struct bfd *output_bfd,
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globals->pic_veneer = pic_veneer;
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globals->fix_cortex_a8 = fix_cortex_a8;
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globals->fix_arm1176 = fix_arm1176;
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globals->cmse_implib = cmse_implib;
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BFD_ASSERT (is_arm_elf (output_bfd));
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elf_arm_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
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@ -16854,6 +16859,95 @@ elf32_arm_output_arch_local_syms (bfd *output_bfd,
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return TRUE;
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}
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/* Filter normal symbols of CMSE entry functions of ABFD to include in
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the import library. All SYMCOUNT symbols of ABFD can be examined
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from their pointers in SYMS. Pointers of symbols to keep should be
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stored continuously at the beginning of that array.
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Returns the number of symbols to keep. */
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static unsigned int
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elf32_arm_filter_cmse_symbols (bfd *abfd ATTRIBUTE_UNUSED,
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struct bfd_link_info *info,
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asymbol **syms, long symcount)
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{
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size_t maxnamelen;
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char *cmse_name;
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long src_count, dst_count = 0;
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struct elf32_arm_link_hash_table *htab;
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htab = elf32_arm_hash_table (info);
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if (!htab->stub_bfd || !htab->stub_bfd->sections)
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symcount = 0;
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maxnamelen = 128;
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cmse_name = (char *) bfd_malloc (maxnamelen);
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for (src_count = 0; src_count < symcount; src_count++)
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{
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struct elf32_arm_link_hash_entry *cmse_hash;
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asymbol *sym;
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flagword flags;
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char *name;
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size_t namelen;
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sym = syms[src_count];
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flags = sym->flags;
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name = (char *) bfd_asymbol_name (sym);
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if ((flags & BSF_FUNCTION) != BSF_FUNCTION)
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continue;
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if (!(flags & (BSF_GLOBAL | BSF_WEAK)))
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continue;
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namelen = strlen (name) + sizeof (CMSE_PREFIX) + 1;
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if (namelen > maxnamelen)
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{
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cmse_name = (char *)
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bfd_realloc (cmse_name, namelen);
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maxnamelen = namelen;
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}
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snprintf (cmse_name, maxnamelen, "%s%s", CMSE_PREFIX, name);
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cmse_hash = (struct elf32_arm_link_hash_entry *)
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elf_link_hash_lookup (&(htab)->root, cmse_name, FALSE, FALSE, TRUE);
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if (!cmse_hash
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|| (cmse_hash->root.root.type != bfd_link_hash_defined
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&& cmse_hash->root.root.type != bfd_link_hash_defweak)
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|| cmse_hash->root.type != STT_FUNC)
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continue;
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if (!ARM_GET_SYM_CMSE_SPCL (cmse_hash->root.target_internal))
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continue;
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syms[dst_count++] = sym;
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}
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free (cmse_name);
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syms[dst_count] = NULL;
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return dst_count;
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}
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/* Filter symbols of ABFD to include in the import library. All
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SYMCOUNT symbols of ABFD can be examined from their pointers in
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SYMS. Pointers of symbols to keep should be stored continuously at
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the beginning of that array.
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Returns the number of symbols to keep. */
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static unsigned int
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elf32_arm_filter_implib_symbols (bfd *abfd ATTRIBUTE_UNUSED,
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struct bfd_link_info *info,
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asymbol **syms, long symcount)
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{
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struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (info);
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if (globals->cmse_implib)
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return elf32_arm_filter_cmse_symbols (abfd, info, syms, symcount);
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else
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return _bfd_elf_filter_global_symbols (abfd, info, syms, symcount);
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}
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/* Allocate target specific section data. */
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static bfd_boolean
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@ -18780,6 +18874,7 @@ elf32_arm_backend_symbol_processing (bfd *abfd, asymbol *sym)
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#define elf_backend_modify_segment_map elf32_arm_modify_segment_map
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#define elf_backend_additional_program_headers elf32_arm_additional_program_headers
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#define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
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#define elf_backend_filter_implib_symbols elf32_arm_filter_implib_symbols
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#define elf_backend_begin_write_processing elf32_arm_begin_write_processing
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#define elf_backend_add_symbol_hook elf32_arm_add_symbol_hook
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#define elf_backend_count_additional_relocs elf32_arm_count_additional_relocs
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18
ld/ChangeLog
18
ld/ChangeLog
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@ -1,3 +1,21 @@
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2016-08-04 Thomas Preud'homme <thomas.preudhomme@arm.com>
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* emultempl/armelf.em (cmse_implib): Declare and define this new
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static variable.
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(arm_elf_create_output_section_statements): Add new cmse_implib
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parameter.
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(OPTION_CMSE_IMPLIB): Define macro.
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(PARSE_AND_LIST_LONGOPTS): Add entry for new --cmse-implib switch.
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(PARSE_AND_LIST_OPTIONS): Likewise.
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(PARSE_AND_LIST_ARGS_CASES): Handle OPTION_CMSE_IMPLIB case.
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* ld.texinfo (--cmse-implib): Document new option.
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* testsuite/ld-arm/arm-elf.exp
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(Secure gateway import library generation): New test.
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(Secure gateway import library generation: errors): Likewise.
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* testsuite/ld-arm/cmse-implib.s: New file.
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* testsuite/ld-arm/cmse-implib-errors.out: Likewise.
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* testsuite/ld-arm/cmse-implib.rd: Likewise.
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2016-08-04 Thomas Preud'homme <thomas.preudhomme@arm.com>
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* ld.texinfo (Placement of SG veneers): New concept entry.
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@ -42,6 +42,7 @@ static int no_wchar_size_warning = 0;
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static int pic_veneer = 0;
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static int merge_exidx_entries = -1;
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static int fix_arm1176 = 1;
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static int cmse_implib = 0;
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static void
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gld${EMULATION_NAME}_before_parse (void)
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@ -514,7 +515,7 @@ arm_elf_create_output_section_statements (void)
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no_enum_size_warning,
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no_wchar_size_warning,
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pic_veneer, fix_cortex_a8,
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fix_arm1176);
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fix_arm1176, cmse_implib);
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stub_file = lang_add_input_file ("linker stubs",
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lang_input_file_is_fake_enum,
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@ -583,6 +584,7 @@ PARSE_AND_LIST_PROLOGUE='
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#define OPTION_NO_FIX_ARM1176 318
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#define OPTION_LONG_PLT 319
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#define OPTION_STM32L4XX_FIX 320
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#define OPTION_CMSE_IMPLIB 321
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'
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PARSE_AND_LIST_SHORTOPTS=p
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@ -609,6 +611,7 @@ PARSE_AND_LIST_LONGOPTS='
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{ "fix-arm1176", no_argument, NULL, OPTION_FIX_ARM1176 },
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{ "no-fix-arm1176", no_argument, NULL, OPTION_NO_FIX_ARM1176 },
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{ "long-plt", no_argument, NULL, OPTION_LONG_PLT },
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{ "cmse-implib", no_argument, NULL, OPTION_CMSE_IMPLIB },
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'
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PARSE_AND_LIST_OPTIONS='
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@ -629,6 +632,8 @@ PARSE_AND_LIST_OPTIONS='
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fprintf (file, _(" --pic-veneer Always generate PIC interworking veneers\n"));
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fprintf (file, _(" --long-plt Generate long .plt entries\n"
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" to handle large .plt/.got displacements\n"));
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fprintf (file, _(" --cmse-implib Make import library to be a secure gateway import\n"
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" library as per ARMv8-M Security Extensions\n"));
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fprintf (file, _("\
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--stub-group-size=N Maximum size of a group of input sections that\n\
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can be handled by one stub section. A negative\n\
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@ -749,6 +754,10 @@ PARSE_AND_LIST_ARGS_CASES='
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case OPTION_LONG_PLT:
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bfd_elf32_arm_use_long_plt ();
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break;
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case OPTION_CMSE_IMPLIB:
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cmse_implib = 1;
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break;
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'
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# We have our own before_allocation etc. functions, but they call
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@ -6859,6 +6859,13 @@ Its start address must be set, either with the command line option
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@samp{--section-start} or in a linker script, to indicate where to place these
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veneers in memory.
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@kindex --cmse-implib
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@cindex Secure gateway import library
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The @samp{--cmse-implib} option requests that the import libraries
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specified by the @samp{--out-implib} and @samp{--in-implib} options are
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secure gateway import libraries, suitable for linking a non-secure
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executable against secure code as per ARMv8-M Security Extensions.
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@ifclear GENERIC
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@lowersections
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@end ifclear
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@ -668,6 +668,18 @@ set armeabitests_nonacl {
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{objdump {-h -j .gnu.sgstubs} cmse-veneers.sd}
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{nm {} cmse-veneers.rd}}
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"cmse-veneers-mainline"}
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{"Secure gateway import library generation: errors"
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"--section-start .gnu.sgstubs=0x20000 --out-implib=tmpdir/cmse-implib.lib --cmse-implib" ""
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"-march=armv8-m.base -mthumb --defsym CHECK_ERRORS=1"
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{cmse-implib.s}
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{{ld cmse-implib-errors.out}}
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"cmse-implib"}
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{"Secure gateway import library generation"
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"--section-start .gnu.sgstubs=0x20000 --out-implib=tmpdir/cmse-implib.lib --cmse-implib" ""
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"-march=armv8-m.base -mthumb"
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{cmse-implib.s}
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{{readelf {-s tmpdir/cmse-implib.lib} cmse-implib.rd}}
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"cmse-implib"}
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{"R_ARM_THM_JUMP19 Relocation veneers: Short"
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"--section-start destsect=0x000108002 --section-start .text=0x8000" ""
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@ -0,0 +1,7 @@
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.*: .*: absent standard symbol `not_exported_fct2'.
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.*: .*: invalid special symbol `__acle_se_not_exported_pseudoentry_var'.
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.*: It must be a global or weak function symbol.
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.*: .*: invalid standard symbol `not_exported_pseudoentry_var'.
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.*: It must be a global or weak function symbol.
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.* cannot size stub section: Invalid operation
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#...
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@ -0,0 +1,13 @@
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File: tmpdir/cmse-implib.lib
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Symbol table '.symtab' contains 5 entries:
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Num: Value Size Type Bind Vis Ndx Name
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0: 00000000 0 NOTYPE LOCAL DEFAULT UND
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1: 00020001 8 FUNC GLOBAL DEFAULT ABS exported_entry_veneer3
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2: [0-9a-f]+ 6 FUNC GLOBAL DEFAULT ABS exported_entry_fct1
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3: 00020009 8 FUNC GLOBAL DEFAULT ABS exported_entry_veneer2
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4: [0-9a-f]+ 6 FUNC GLOBAL DEFAULT ABS exported_entry_fct2
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File: tmpdir/cmse-implib
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#...
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@ -0,0 +1,58 @@
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.syntax unified
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.text
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.macro entry name, vis, entry_fct
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.align 2
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.\vis \name
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.\vis __acle_se_\name
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.thumb
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.thumb_func
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.type \name, %function
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.type __acle_se_\name, %function
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\name:
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.ifnb \entry_fct
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\entry_fct
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.endif
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__acle_se_\name:
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nop
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.size \name, .-\name
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.size __acle_se_\name, .-__acle_se_\name
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.endm
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@ Valid setups for veneer generation
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entry exported_entry_veneer2, global
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entry exported_entry_veneer3, global
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@ Valid setup for entry function without veneer generation
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entry exported_entry_fct1, global, sg
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entry exported_entry_fct2, global, sg
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@ Normal symbol not exported to SG import library
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.align 2
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.global not_exported_fct1
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.type not_exported_fct1, %function
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not_exported_fct1:
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nop
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.size not_exported_fct1, .-not_exported_fct1
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.ifdef CHECK_ERRORS
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@ Invalid setups for export to SG import library
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.align 2
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.global __acle_se_not_exported_fct2
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.type __acle_se_not_exported_fct2, %function
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__acle_se_not_exported_fct2:
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nop
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.size __acle_se_not_exported_fct2, .-__acle_se_not_exported_fct2
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.align 2
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.global __acle_se_not_exported_pseudoentry_var
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.global not_exported_pseudoentry_var
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.data
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.type __acle_se_not_exported_pseudoentry_var, %object
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.type not_exported_pseudoentry_var, %object
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.size not_exported_pseudoentry_var, 4
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.size __acle_se_not_exported_pseudoentry_var, 4
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__acle_se_not_exported_pseudoentry_var:
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not_exported_pseudoentry_var:
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.word 42
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.endif
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