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The existing field func_info (in the SFrame FDE) is used to convey important information around the encoding and interpretation of the rest of the stack trace data for the respective SFrame FDE: the SFrame FRE type, SFrame FDE PC type, etc. Currently there is 1 bit left for AArch64, and 2 bits for AMD64, s390x (and other future ABIs to be supported). Provision some additional space now (specifically an additional 8-bits) for future needs for V3 and beyond. Compared to V2, this now increases the size of SFrame FDE by 1 byte in V3. In this patch, the additional func_info2 byte is not used functionally yet. Hence, rather mechanical changes in libsframe, bfd and libsframe/testsuite accompany. We will put func_info2 into use in a later patch by reserving 5 of these bits for SFrame FDE types. With the addition of a new byte for additional func info (func_info2), add a new arg to allow usecases like textual dumper to get all data members in one API: sframe_decoder_get_funcdesc_v3. To keep the APIs symmetric looking, add new arg to sframe_encoder_add_funcdesc_v3 too. Since bfd uses these APIs, carry out the mechanical change in the respective APIs too. And of course, the testsuite which exercises these APIs. bfd/ * elf-sframe.c (_bfd_elf_merge_section_sframe): Get and set func_info2. * elf64-s390.c (_bfd_s390_elf_create_sframe_plt): Pass 0 for func_info2 for SFrame FDE for PLT. * elfxx-x86.c (_bfd_x86_elf_create_sframe_plt): Likewise. gas/ * gen-sframe.c (output_sframe_funcdesc): Emit the uint8_t for func_info2. libsframe/ * sframe-dump.c (dump_sframe_func_with_fres): * sframe.c (sframe_fde_tbl_init): Handle the new additional member. (sframe_encoder_write_fde): Likewise. * sframe.c (sframe_decoder_get_funcdesc_v3): Update func_info2. libsframe/testsuite/ * libsframe.decode/DATA2: Update data file with SFrame section data. * libsframe.encode/encode-1.c: Pass 0 for func_info2 arg. * libsframe.find/findfre-1.c: Likewise. * libsframe.find/findfunc-1.c: Likewise. * libsframe.find/plt-findfre-1.c: Likewise. * libsframe.find/plt-findfre-2.c: Likewise. include/ * sframe.h: Add new uint8_t sfde_func_info2 to sframe_func_desc_entry_v3. * sframe-api.h (sframe_decoder_get_funcdesc_v3): New arg. (sframe_encoder_add_funcdesc_v3): Likewise.
README for GNU development tools This directory contains various GNU compilers, assemblers, linkers, debuggers, etc., plus their support routines, definitions, and documentation. If you are receiving this as part of a GDB release, see the file gdb/README. If with a binutils release, see binutils/README, and so on. That'll give you info about this package -- supported targets, how to use it, how to report bugs, etc. It is now possible to automatically configure and build a variety of tools with one command. To build all of the tools contained herein, run the ``configure'' script here, e.g.: ./configure make To install them (by default in /usr/local/bin, /usr/local/lib, etc), then do: make install (If the configure script can't determine your type of computer, give it the name as an argument, for instance ``./configure sun4''. You can use the script ``config.sub'' to test whether a name is recognized; if it is, config.sub translates it to a triplet specifying CPU, vendor, and OS.) If you have more than one compiler on your system, it is often best to explicitly set CC in the environment before running configure, and to also set CC when running make. For example (assuming sh/bash/ksh): CC=gcc ./configure make A similar example using csh: setenv CC gcc ./configure make Much of the code and documentation enclosed is copyright by the Free Software Foundation, Inc. See the file COPYING or COPYING.LIB in the various directories, for a description of the GNU General Public License terms under which you can copy the files. REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info on where and how to report problems.