binutils-gdb

Tree: cf0e0a0ba9

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Author	SHA1	Message	Date
Indu Bhagat	cf0e0a0ba9	bfd: linker: merge .sframe sections The linker merges all the input .sframe sections. When merging, the linker verifies that all the input .sframe sections have the same abi/arch. The linker uses libsframe library to perform key actions on the .sframe sections - decode, read, and create output data. This implies buildsystem changes to make and install libsframe before libbfd. The linker places the output .sframe section in a new segment of its own: PT_GNU_SFRAME. A new segment is not added, however, if the generated .sframe section is empty. When a section is discarded from the final link, the corresponding entries in the .sframe section for those functions are also deleted. The linker sorts the SFrame FDEs on start address by default and sets the SFRAME_F_FDE_SORTED flag in the .sframe section. This patch also adds support for generation of SFrame unwind information for the .plt* sections on x86_64. SFrame unwind info is generated for IBT enabled PLT, lazy/non-lazy PLT. The existing linker option --no-ld-generated-unwind-info has been adapted to include the control of whether .sframe unwind information will be generated for the linker generated sections like PLT. Changes to the linker script have been made as necessary. ChangeLog: * Makefile.def: Add install dependency on libsframe for libbfd. * Makefile.in: Regenerated. * bfd/Makefile.am: Add elf-sframe.c * bfd/Makefile.in: Regenerated. * bfd/bfd-in2.h (SEC_INFO_TYPE_SFRAME): Regenerated. * bfd/configure: Regenerate. * bfd/configure.ac: Add elf-sframe.lo. * bfd/elf-bfd.h (struct sframe_func_bfdinfo): New struct. (struct sframe_dec_info): Likewise. (struct sframe_enc_info): Likewise. (struct elf_link_hash_table): New member for encoded .sframe object. (struct output_elf_obj_tdata): New member. (elf_sframe): New access macro. (_bfd_elf_set_section_sframe): New declaration. * bfd/elf.c (get_segment_type): Handle new segment PT_GNU_SFRAME. (bfd_section_from_phdr): Likewise. (get_program_header_size): Likewise. (_bfd_elf_map_sections_to_segments): Likewise. * bfd/elf64-x86-64.c (elf_x86_64_link_setup_gnu_properties): Add contents to the .sframe sections or .plt* entries. * bfd/elflink.c (elf_section_ignore_discarded_relocs): Handle SEC_INFO_TYPE_SFRAME. (_bfd_elf_default_action_discarded): Handle .sframe section. (elf_link_input_bfd): Merge .sframe section. (bfd_elf_final_link): Write the output .sframe section. (bfd_elf_discard_info): Handle discarding .sframe section. * bfd/elfxx-x86.c (_bfd_x86_elf_size_dynamic_sections): Create .sframe section for .plt and .plt.sec. (_bfd_x86_elf_finish_dynamic_sections): Handle .sframe from .plt* sections. * bfd/elfxx-x86.h (PLT_SFRAME_FDE_START_OFFSET): New definition. (SFRAME_PLT0_MAX_NUM_FRES): Likewise. (SFRAME_PLTN_MAX_NUM_FRES): Likewise. (struct elf_x86_sframe_plt): New structure. (struct elf_x86_link_hash_table): New member. (struct elf_x86_init_table): New members for .sframe creation. * bfd/section.c: Add new definition SEC_INFO_TYPE_SFRAME. * binutils/readelf.c (get_segment_type): Handle new segment PT_GNU_SFRAME. * ld/ld.texi: Update documentation for --no-ld-generated-unwind-info. * ld/scripttempl/elf.sc: Support .sframe sections. * ld/Makefile.am (TESTSFRAMELIB): Use it. (check-DEJAGNU): Likewise. * ld/Makefile.in: Regenerated. * ld/configure.ac (TESTSFRAMELIB): Set to the .so or .a like TESTBFDLIB. * ld/configure: Regenerated. * bfd/elf-sframe.c: New file. include/ChangeLog: * elf/common.h (PT_GNU_SFRAME): New definition. * elf/internal.h (struct elf_segment_map): Handle new segment type PT_GNU_SFRAME. ld/testsuite/ChangeLog: * ld/testsuite/ld-bootstrap/bootstrap.exp: Add SFRAMELIB. * ld/testsuite/ld-aarch64/aarch64-elf.exp: Add new test sframe-simple-1. * ld/testsuite/ld-aarch64/sframe-bar.s: New file. * ld/testsuite/ld-aarch64/sframe-foo.s: Likewise. * ld/testsuite/ld-aarch64/sframe-simple-1.d: Likewise. * ld/testsuite/ld-sframe/sframe-empty.d: New test. * ld/testsuite/ld-sframe/sframe-empty.s: New file. * ld/testsuite/ld-sframe/sframe.exp: New testsuite. * ld/testsuite/ld-x86-64/sframe-bar.s: New file. * ld/testsuite/ld-x86-64/sframe-foo.s: Likewise. * ld/testsuite/ld-x86-64/sframe-simple-1.d: Likewise. * ld/testsuite/ld-x86-64/sframe-plt-1.d: Likewise. * ld/testsuite/ld-x86-64/sframe-simple-1.d: Likewise. * ld/testsuite/ld-x86-64/x86-64.exp: Add new tests - sframe-simple-1, sframe-plt-1. * ld/testsuite/lib/ld-lib.exp: Add new proc to check if assembler supports SFrame section. * ld/testsuite/ld-sframe/discard.d: New file. * ld/testsuite/ld-sframe/discard.ld: Likewise. * ld/testsuite/ld-sframe/discard.s: Likewise.	3 years ago
Weimin Pan	19e559f1c9	libsframe: add the SFrame library libsframe is a library that allows you to: - decode a .sframe section - probe and inspect a .sframe section - encode (and eventually write) a .sframe section. This library is currently being used by the linker, readelf, objdump. This library will also be used by the SFrame unwinder which is still to be upstream'd. The file include/sframe-api.h defines the user-facing APIs for decoding, encoding and probing .sframe sections. A set of error codes together with their error message strings are also defined. Endian flipping is performed automatically at read and write time, if cross-endianness is detected. ChangeLog: * Makefile.def: Add libsframe as new module with its dependencies. * Makefile.in: Regenerated. * binutils/Makefile.am: Add libsframe. * binutils/Makefile.in: Regenerated. * configure: Regenerated * configure.ac: Add libsframe to host_libs. * libsframe/Makefile.am: New file. * libsframe/Makefile.in: New file. * libsframe/aclocal.m4: New file. * libsframe/config.h.in: New file. * libsframe/configure: New file. * libsframe/configure.ac: New file. * libsframe/sframe-error.c: New file. * libsframe/sframe-impl.h: New file. * libsframe/sframe.c: New file. include/ChangeLog: * sframe-api.h: New file. testsuite/ChangeLog: * libsframe/testsuite/Makefile.am: New file. * libsframe/testsuite/Makefile.in: Regenerated. * libsframe/testsuite/libsframe.decode/Makefile.am: New file. * libsframe/testsuite/libsframe.decode/Makefile.in: Regenerated. * libsframe/testsuite/libsframe.decode/decode.exp: New file. * libsframe/testsuite/libsframe.encode/Makefile.am: Likewise. * libsframe/testsuite/libsframe.encode/Makefile.in: Regenerated. * libsframe/testsuite/libsframe.encode/encode.exp: New file. * libsframe/testsuite/libsframe.encode/encode-1.c: Likewise. * libsframe/testsuite/libsframe.decode/be-flipping.c: Likewise. * libsframe/testsuite/libsframe.decode/frecnt-1.c: Likewise. * libsframe/testsuite/libsframe.decode/frecnt-2.c: Likewise. * libsframe/testsuite/libsframe.decode/DATA-BE: New file. * libsframe/testsuite/libsframe.decode/DATA1: Likewise. * libsframe/testsuite/libsframe.decode/DATA2: Likewise.	3 years ago

Author

SHA1

Message

Date

Indu Bhagat

cf0e0a0ba9

bfd: linker: merge .sframe sections

The linker merges all the input .sframe sections.  When merging, the
linker verifies that all the input .sframe sections have the same
abi/arch.

The linker uses libsframe library to perform key actions on the
.sframe sections - decode, read, and create output data.  This
implies buildsystem changes to make and install libsframe before
libbfd.

The linker places the output .sframe section in a new segment of its
own: PT_GNU_SFRAME.  A new segment is not added, however, if the
generated .sframe section is empty.

When a section is discarded from the final link, the corresponding
entries in the .sframe section for those functions are also deleted.

The linker sorts the SFrame FDEs on start address by default and sets
the SFRAME_F_FDE_SORTED flag in the .sframe section.

This patch also adds support for generation of SFrame unwind
information for the .plt* sections on x86_64.  SFrame unwind info is
generated for IBT enabled PLT, lazy/non-lazy PLT.

The existing linker option --no-ld-generated-unwind-info has been
adapted to include the control of whether .sframe unwind information
will be generated for the linker generated sections like PLT.

Changes to the linker script have been made as necessary.

ChangeLog:

	* Makefile.def: Add install dependency on libsframe for libbfd.
	* Makefile.in: Regenerated.
	* bfd/Makefile.am: Add elf-sframe.c
	* bfd/Makefile.in: Regenerated.
	* bfd/bfd-in2.h (SEC_INFO_TYPE_SFRAME): Regenerated.
	* bfd/configure: Regenerate.
	* bfd/configure.ac: Add elf-sframe.lo.
	* bfd/elf-bfd.h (struct sframe_func_bfdinfo): New struct.
	(struct sframe_dec_info): Likewise.
	(struct sframe_enc_info): Likewise.
	(struct elf_link_hash_table): New member for encoded .sframe
	object.
	(struct output_elf_obj_tdata): New member.
	(elf_sframe): New access macro.
	(_bfd_elf_set_section_sframe): New declaration.
	* bfd/elf.c (get_segment_type): Handle new segment
	PT_GNU_SFRAME.
	(bfd_section_from_phdr): Likewise.
	(get_program_header_size): Likewise.
	(_bfd_elf_map_sections_to_segments): Likewise.
	* bfd/elf64-x86-64.c (elf_x86_64_link_setup_gnu_properties): Add
	contents to the .sframe sections or .plt* entries.
	* bfd/elflink.c (elf_section_ignore_discarded_relocs): Handle
	SEC_INFO_TYPE_SFRAME.
	(_bfd_elf_default_action_discarded): Handle .sframe section.
	(elf_link_input_bfd): Merge .sframe section.
	(bfd_elf_final_link): Write the output .sframe section.
	(bfd_elf_discard_info): Handle discarding .sframe section.
	* bfd/elfxx-x86.c (_bfd_x86_elf_size_dynamic_sections): Create
	.sframe section for .plt and .plt.sec.
	(_bfd_x86_elf_finish_dynamic_sections): Handle .sframe from
	.plt* sections.
	* bfd/elfxx-x86.h (PLT_SFRAME_FDE_START_OFFSET): New
	definition.
	(SFRAME_PLT0_MAX_NUM_FRES): Likewise.
	(SFRAME_PLTN_MAX_NUM_FRES): Likewise.
	(struct elf_x86_sframe_plt): New structure.
	(struct elf_x86_link_hash_table): New member.
	(struct elf_x86_init_table): New members for .sframe
	creation.
	* bfd/section.c: Add new definition SEC_INFO_TYPE_SFRAME.
	* binutils/readelf.c (get_segment_type): Handle new segment
	PT_GNU_SFRAME.
	* ld/ld.texi: Update documentation for
	--no-ld-generated-unwind-info.
	* ld/scripttempl/elf.sc: Support .sframe sections.
	* ld/Makefile.am (TESTSFRAMELIB): Use it.
	(check-DEJAGNU): Likewise.
	* ld/Makefile.in: Regenerated.
	* ld/configure.ac (TESTSFRAMELIB): Set to the .so or .a like TESTBFDLIB.
	* ld/configure: Regenerated.
	* bfd/elf-sframe.c: New file.

include/ChangeLog:

	* elf/common.h (PT_GNU_SFRAME): New definition.
	* elf/internal.h (struct elf_segment_map): Handle new segment
	type PT_GNU_SFRAME.

ld/testsuite/ChangeLog:

	* ld/testsuite/ld-bootstrap/bootstrap.exp: Add SFRAMELIB.
	* ld/testsuite/ld-aarch64/aarch64-elf.exp: Add new test
	  sframe-simple-1.
	* ld/testsuite/ld-aarch64/sframe-bar.s: New file.
	* ld/testsuite/ld-aarch64/sframe-foo.s: Likewise.
	* ld/testsuite/ld-aarch64/sframe-simple-1.d: Likewise.
	* ld/testsuite/ld-sframe/sframe-empty.d: New test.
	* ld/testsuite/ld-sframe/sframe-empty.s: New file.
	* ld/testsuite/ld-sframe/sframe.exp: New testsuite.
	* ld/testsuite/ld-x86-64/sframe-bar.s: New file.
	* ld/testsuite/ld-x86-64/sframe-foo.s: Likewise.
	* ld/testsuite/ld-x86-64/sframe-simple-1.d: Likewise.
	* ld/testsuite/ld-x86-64/sframe-plt-1.d: Likewise.
	* ld/testsuite/ld-x86-64/sframe-simple-1.d: Likewise.
	* ld/testsuite/ld-x86-64/x86-64.exp: Add new tests -
	  sframe-simple-1, sframe-plt-1.
	* ld/testsuite/lib/ld-lib.exp: Add new proc to check if
	  assembler supports SFrame section.
	* ld/testsuite/ld-sframe/discard.d: New file.
	* ld/testsuite/ld-sframe/discard.ld: Likewise.
	* ld/testsuite/ld-sframe/discard.s: Likewise.

3 years ago

Weimin Pan

19e559f1c9

libsframe: add the SFrame library

libsframe is a library that allows you to:
- decode a .sframe section
- probe and inspect a .sframe section
- encode (and eventually write) a .sframe section.

This library is currently being used by the linker, readelf, objdump.
This library will also be used by the SFrame unwinder which is still
to be upstream'd.

The file include/sframe-api.h defines the user-facing APIs for decoding,
encoding and probing .sframe sections. A set of error codes together
with their error message strings are also defined.

Endian flipping is performed automatically at read and write time, if
cross-endianness is detected.

ChangeLog:

	* Makefile.def: Add libsframe as new module with its
	dependencies.
	* Makefile.in: Regenerated.
	* binutils/Makefile.am: Add libsframe.
	* binutils/Makefile.in: Regenerated.
	* configure: Regenerated
	* configure.ac: Add libsframe to host_libs.
	* libsframe/Makefile.am: New file.
	* libsframe/Makefile.in: New file.
	* libsframe/aclocal.m4: New file.
	* libsframe/config.h.in: New file.
	* libsframe/configure: New file.
	* libsframe/configure.ac: New file.
	* libsframe/sframe-error.c: New file.
	* libsframe/sframe-impl.h: New file.
	* libsframe/sframe.c: New file.

include/ChangeLog:

	* sframe-api.h: New file.

testsuite/ChangeLog:

	* libsframe/testsuite/Makefile.am: New file.
	* libsframe/testsuite/Makefile.in: Regenerated.
	* libsframe/testsuite/libsframe.decode/Makefile.am: New
	  file.
	* libsframe/testsuite/libsframe.decode/Makefile.in:
	  Regenerated.
	* libsframe/testsuite/libsframe.decode/decode.exp: New file.
	* libsframe/testsuite/libsframe.encode/Makefile.am:
	  Likewise.
	* libsframe/testsuite/libsframe.encode/Makefile.in:
	  Regenerated.
	* libsframe/testsuite/libsframe.encode/encode.exp: New file.
	* libsframe/testsuite/libsframe.encode/encode-1.c: Likewise.
	* libsframe/testsuite/libsframe.decode/be-flipping.c: Likewise.
	* libsframe/testsuite/libsframe.decode/frecnt-1.c: Likewise.
	* libsframe/testsuite/libsframe.decode/frecnt-2.c: Likewise.
	* libsframe/testsuite/libsframe.decode/DATA-BE: New file.
	* libsframe/testsuite/libsframe.decode/DATA1: Likewise.
	* libsframe/testsuite/libsframe.decode/DATA2: Likewise.

3 years ago

2 Commits (cf0e0a0ba91664b680dff1e310f24dbe6447bd4c)