binutils-gdb

Commit Graph

Author	SHA1	Message	Date
Indu Bhagat	540034ec40	sframe/doc: minor improvements for readability libsframe/ * sframe-spec.texi: Cosmetic fixes.	3 years ago
Indu Bhagat	83c219872b	libsframe: revisit sframe_find_fre API Inspite of implementing a rather simple functionality, this function was relatively difficult to follow, and maintain. Some changes are done now to address that - refactor the function and use better names to make it more readable. The changes to the implementation do not cause any change in the contract of the API. libsframe/ * sframe.c (sframe_fre_get_end_ip_offset): to here... (sframe_find_fre): Refactor some bits from...	3 years ago
Indu Bhagat	812d868850	libsframe: use const char * consistently for immutable FRE buffers libsframe/ * sframe.c (sframe_decode_fre): Use const char * datatype when handling buffer containing the FREs. (sframe_fre_get_end_ip_offset): Likewise. (sframe_find_fre): Likewise. (sframe_decoder_get_fre): Likewise.	3 years ago
Indu Bhagat	e80578bea7	libsframe: use uint8_t data type for FRE info related stubs libsframe/ * sframe.c: Use uint8_t for FRE offset count and FRE offset size. Use uint8_t for FRE info word as well.	3 years ago
Indu Bhagat	6a99f006ec	libsframe: testsuite: add tests for sframe_get_funcdesc_with_addr API sframe_get_funcdesc_with_addr API is currently used internally by the sframe_find_fre (). In this test, we create three dummy SFrame FDEs with 4 FREs each. Then, we use few negative tests to lookup FREs with PCs not in the range of PCs covered by the FDEs, ensuring graceful return from sframe_get_funcdesc_with_addr in all cases. Some positive tests are also added that exercise further scenarios as well. libsframe/ * Makefile.in: Regenerated. * testsuite/libsframe.find/find.exp: Include new test. * testsuite/libsframe.find/findfunc-1.c: New Test. * testsuite/libsframe.find/local.mk: Include new test.	3 years ago
Indu Bhagat	efd3b63b68	libsframe: testsuite: add new tests for sframe_find_fre API libsframe provides an API to find the FRE associated with a given PC in the program. This patch adds a direct test of this API. In this test, we create two dummy SFrame FDEs with 4 FREs each. Then we test that sframe_find_fre () works for the first, second, third and the last FRE from one of the FDEs. Such a test ensures better regression testing for the sframe_find_fre () function which is going to be the bread and butter of an SFrame based stack tracer. libsframe/ * Makefile.in: Regenerated. * testsuite/libsframe.find/find.exp: New test. * testsuite/libsframe.find/findfre-1.c: New test. * testsuite/libsframe.find/local.mk: Build new test. * testsuite/local.mk: Include libsframe.find.	3 years ago
Indu Bhagat	3cae258044	libsframe: minor formatting fixes in sframe_encoder_write_fre libsframe/ * sframe.c (sframe_encoder_write_fre): Formatting fixes for readability.	3 years ago
Indu Bhagat	cb45766e48	libsframe: use consistent function argument names libsframe/ * sframe.c (sframe_decoder_get_header): Use consistent function arg names. (sframe_decoder_free): Likewise. (sframe_encode): Use more appropriate var name.	3 years ago
Indu Bhagat	8bb878b777	sframe: correct some typos include/ * sframe.h: Correct a typo. libsframe/ * sframe.c: Likewise.	3 years ago
Indu Bhagat	26be6015b7	libsframe: use return type of bool for predicate functions libsframe/ * sframe.c (sframe_header_sanity_check_p): Change return type to bool. (sframe_fre_sanity_check_p): Likewise.	3 years ago
Alan Modra	41738595c2	Remove unnecessary memsets in sframe-dump.c * sframe-dump.c (dump_sframe_func_with_fres): Don't memset temp.	3 years ago
Indu Bhagat	469b6d54d3	libsframe/doc: use "stack trace" instead of "unwind" for SFrame SFrame format is meant for generating stack traces only. libsframe/ * doc/sframe-spec.texi: Use "stack trace" instead of "unwind".	4 years ago
Indu Bhagat	436bcab712	libsframe/doc: fix some warnings 'make pdf' in libsframe shows some warnings, some of which (especially the Overfull warnings) are causing undesirable effects on the rendered output. Few examples of the warnings: Underfull \hbox (badness 10000) in paragraph at lines 406--407 @texttt pauth_ Underfull \hbox (badness 10000) in paragraph at lines 407--410 @textrm Specify which key is used for signing the return ... Overfull \hbox (2.0987pt too wide) in paragraph at lines 412--413 @texttt fdetype[]\| ... Overfull \hbox (28.87212pt too wide) in paragraph at lines 446--447 @textrm SFRAME[]FDE[]TYPE[]PCMASK\| ... This patch adjusts column widths of the affected cells to fix a subset of these warnings. For the rest of the warnings, use explicit newline command to fix them. libsframe/ * doc/sframe-spec.texi: Fix various underfull and overfull warnings.	4 years ago
Indu Bhagat	0fcd58d843	libsframe: Use AM_SILENT_RULES macro in configure.ac Silence 'make' by default. libsframe/ * configure.ac: Use AM_SILENT_RULES. * configure: Regenerate.	4 years ago
Indu Bhagat	68e0003e12	libsframe: replace an strncat with strcat Calling strncat with the size of the src string is not so meaningful. The length argument to strncat should specify the remaining bytes bytes in the destination; although in this case, it appears to be unncessary altogether to use strncat in the first place. libsframe/ * sframe-dump.c (dump_sframe_func_with_fres): Use of strcat is just as fine.	4 years ago
Indu Bhagat	725a19bfd1	sframe: fix the defined SFRAME_FRE_TYPE__LIMIT constants An earlier commit `3f107464` defined the SFRAME_FRE_TYPE__LIMIT constants. These constants are used (by gas and libsframe) to pick an SFrame FRE type based on the function size. Those constants, however, were buggy, causing the generated SFrame sections to be bloated as SFRAME_FRE_TYPE_ADDR2/SFRAME_FRE_TYPE_ADDR4 got chosen more often than necessary. gas/ * sframe-opt.c (sframe_estimate_size_before_relax): Use typecast. (sframe_convert_frag): Likewise. libsframe/ * sframe.c (sframe_calc_fre_type): Use a more appropriate type for argument. Adjust the check for SFRAME_FRE_TYPE_ADDR4_LIMIT to keep it warning-free but meaningful. include/ * sframe-api.h (sframe_calc_fre_type): Use a more appropriate type for the argument. * sframe.h (SFRAME_FRE_TYPE_ADDR1_LIMIT): Correct the constant. (SFRAME_FRE_TYPE_ADDR2_LIMIT): Likewise. (SFRAME_FRE_TYPE_ADDR4_LIMIT): Likewise.	4 years ago
Indu Bhagat	cd9aea32cf	libsframe: adjust an incorrect check in flip_sframe When sframe_encoder_write needs to flip the buffer containing the SFrame section before writing, it is not necessary that the SFrame FDES are in the order of their sfde_func_start_fre_off. On the contrary, SFrame FDEs will be sorted in the order of their start address. So, remove this incorrect assumption which is basically assuming that the last sfde_func_start_fre_off seen will help determine the end of the flipped buffer. The function now keeps track of the bytes_flipped and then compares it with the expected value. Also, added two more checks at appropriate places: - check that the SFrame FDE read is within bounds - check that the SFrame FRE read is within bounds libsframe/ * sframe.c (flip_sframe): Adjust an incorrect check. Add other checks to ensure reads are within the buffer size.	4 years ago
Alan Modra	d87bef3a7b	Update year range in copyright notice of binutils files The newer update-copyright.py fixes file encoding too, removing cr/lf on binutils/bfdtest2.c and ld/testsuite/ld-cygwin/exe-export.exp, and embedded cr in binutils/testsuite/binutils-all/ar.exp string match.	4 years ago
Indu Bhagat	68bb0d2765	libsframe: write out SFrame FRE start address correctly The following test was failing on ppc64 and s390x: "FAIL: encode-1: Encode buffer match" The offending stub was how we memcpy the FRE start address to the buffer (on-disk format). When the host is big-endian, the address of the source buffer for the memcpy needs to point to the uint8_t/uint16_t sized value of the FRE start addr, not uint32_t sized value; we intend to copy out only the fre_start_addr_sz number of bytes. ChangeLog: * libsframe/sframe.c (sframe_encoder_write_fre_start_addr): New function. (sframe_encoder_write_fre): Use it instead of memcpy.	4 years ago
Indu Bhagat	28f1a767db	libsframe: testsuite: fix memory leaks in testcases ChangeLog: * libsframe/testsuite/libsframe.decode/be-flipping.c: Free SFrame buffer. * libsframe/testsuite/libsframe.decode/frecnt-1.c: Likewise. * libsframe/testsuite/libsframe.decode/frecnt-2.c: Likewise.	4 years ago
Indu Bhagat	995bc59782	libsframe: fix a memory leak in sframe_decode sframe_decode () needs to malloc a temporary buffer of the same size as the input buffer (containing the SFrame section bytes) when endian flipping is needed. The decoder keeps the endian flipped contents in this buffer for its usage. This code is necessary when the target endianneess is not the same as host endianness. The malloc'd buffer needs to be kept track of, so that it can freed up in sframe_decoder_free () later. ChangeLog: * libsframe/sframe-impl.h (struct sframe_decoder_ctx): Add new member to keep track of the internally malloc'd buffer. * libsframe/sframe.c (sframe_decoder_free): Free it up. (sframe_decode): Update the reference to the buffer.	4 years ago
Indu Bhagat	2440ed038a	sframe: doc: update documentation for pauth key in SFrame FDE ChangeLog: * libsframe/doc/sframe-spec.texi	4 years ago
Indu Bhagat	95e829affb	objdump/readelf: sframe: emit marker for SFrame FDE with B key ChangeLog: * libsframe/sframe-dump.c (is_sframe_abi_arch_aarch64): New definition. (dump_sframe_func_with_fres): Emit a string if B key is used.	4 years ago
Indu Bhagat	6e09ae77a1	sframe: doc: update spec for the mangled-RA bit in FRE ChangeLog: * libsframe/doc/sframe-spec.texi	4 years ago
Indu Bhagat	49948bce0e	objdump/readelf: sframe: emit marker for FREs with mangled RA In the textual dump of the SFrame section, when an SFrame FRE recovers a mangled RA, use string "[s]" in the output to indicate that the return address is a signed (mangled) one. ChangeLog: * libsframe/sframe-dump.c (dump_sframe_func_with_fres): Postfix with "[s]" if RA is signed with authorization code.	4 years ago
Indu Bhagat	9c4b163cb5	libsframe: provide new access API for mangled RA bit include/ChangeLog: * sframe-api.h (sframe_fre_get_ra_mangled_p): New declaration. ChangeLog: * libsframe/sframe.c (sframe_get_fre_ra_mangled_p): New definition. (sframe_fre_get_ra_mangled_p): New static function.	4 years ago
Indu Bhagat	8c078abdc2	libsframe asan: avoid generating misaligned loads There are two places where unaligned loads were seen on aarch64: - #1. access to the SFrame FRE stack offsets in the in-memory representation/abstraction provided by libsframe. - #2. access to the SFrame FRE start address in the on-disk representation of the frame row entry. For #1, we can fix this by reordering the struct members of sframe_frame_row_entry in libsframe/sframe-api.h. For #2, we need to default to using memcpy instead, and copy out the bytes to a location for output. SFrame format is an unaligned on-disk format. As such, there are other blobs of memory in the on-disk SFrame FRE that are on not on their natural boundaries. But that does not pose further problems yet, because the users are provided access to the on-disk SFrame FRE data via libsframe's sframe_frame_row_entry, the latter has its' struct members aligned on their respective natural boundaries (and initialized using memcpy). PR 29856 libsframe asan: load misaligned at sframe.c:516 ChangeLog: PR libsframe/29856 * bfd/elf64-x86-64.c: Adjust as the struct members have been reordered. * libsframe/sframe.c (sframe_decode_fre_start_address): Use memcpy to perform 16-bit/32-bit reads. * libsframe/testsuite/libsframe.encode/encode-1.c: Adjust as the struct members have been reordered. include/ChangeLog: PR libsframe/29856 * sframe-api.h: Reorder fre_offsets for natural alignment.	4 years ago
Indu Bhagat	b659fb3585	libsframe: rename API sframe_fde_func_info to sframe_fde_create_func_info The new name better reflects the purpose of the function. ChangeLog: * bfd/elfxx-x86.c (_bfd_x86_elf_create_sframe_plt): Use new name. * libsframe/sframe.c (sframe_fde_create_func_info): Rename sframe_fde_func_info to this. * libsframe/testsuite/libsframe.encode/encode-1.c: Use new name. include/ChangeLog: * sframe-api.h (sframe_fde_create_func_info): Rename sframe_fde_func_info to this.	4 years ago
Indu Bhagat	3f107464e3	sframe: gas: libsframe: define constants and remove magic numbers Define constants in sframe.h for the various limits associated with the range of offsets that can be encoded in the start address of an SFrame FRE. E.g., sframe_frame_row_entry_addr1 is used when start address offset can be encoded as 1-byte unsigned value. Update the code in gas to use these defined constants as it checks for these limits, and remove the usage of magic numbers. ChangeLog: * gas/sframe-opt.c (sframe_estimate_size_before_relax): (sframe_convert_frag): Do not use magic numbers. * libsframe/sframe.c (sframe_calc_fre_type): Likewise. include/ChangeLog: * sframe.h (SFRAME_FRE_TYPE_ADDR1_LIMIT): New constant. (SFRAME_FRE_TYPE_ADDR2_LIMIT): Likewise. (SFRAME_FRE_TYPE_ADDR4_LIMIT): Likewise.	4 years ago
Indu Bhagat	1e2a61ef2d	libsframe: minor formatting nits ChangeLog: * libsframe/sframe.c: Fix formatting nits.	4 years ago
Indu Bhagat	cbff1430f8	sframe/doc: remove usage of xrefautomaticsectiontitle xrefautomaticsectiontitle appears to be available from texinfo 5.0 or greater. As such, it is not worthwhile to add requirement for a minimum necessary makeinfo version. So remove the usage of it. Also align node name with section title where possible. ChangeLog: * libsframe/doc/sframe-spec.texi: Remove usage of xrefautomaticsectiontitle.	4 years ago
Indu Bhagat	c1c57352f5	doc: add SFrame spec file ChangeLog: * libsframe/Makefile.am: Add info-in-builddir to AUTOMAKE_OPTIONS. Include doc/local.mk. * libsframe/Makefile.in: Regenerated. * libsframe/configure: Likewise. * libsframe/configure.ac: Check for makeinfo and set BUILD_INFO. * libsframe/doc/local.mk: New file. * libsframe/doc/sframe-spec.texi: Likewise.	4 years ago
Indu Bhagat	42b6953bba	readelf/objdump: support for SFrame section This patch adds support for SFrame in readelf and objdump. The arguments of --sframe are optional for both readelf and objdump. include/ChangeLog: * sframe-api.h (dump_sframe): New function declaration. ChangeLog: * binutils/Makefile.am: Add dependency on libsframe for readelf and objdump. * binutils/Makefile.in: Regenerate. * binutils/doc/binutils.texi: Document --sframe=[section]. * binutils/doc/sframe.options.texi: New file. * binutils/objdump.c: Add support for SFrame format. * binutils/readelf.c: Likewise. * include/sframe-api.h: Add new API for dumping .sframe section. * libsframe/Makefile.am: Add sframe-dump.c. * libsframe/Makefile.in: Regenerate. * libsframe/sframe-dump.c: New file.	4 years ago
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.	4 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.	4 years ago

35 Commits (85f4cf41a852b5983ca436615a019315f6dc7301)