cskyelf.em branch stub handling
This fixes the csky-elf ld-elf/pr21884 and ld-unique/pr21529 failures, by disabling branch stubs for binary (and other non-csky) output. The csky-linux target gets branch stubs off by default because presumably there are reasons why branch stubs were disabled, but rather than killing the support completely it can be enabled by --branch-stub. * emultempl/cskyelf.em (csk_elf_before_parse): New function, setting use_branch_stub false for linux. (csky_elf_create_output_section_statements): Do emit this function and all others in the file for linux, plus the branch option control. Disable branch stubs when non-ELF.
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parent
c55b17b809
commit
53b81c6de1
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@ -1,3 +1,11 @@
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2019-04-10 Alan Modra <amodra@gmail.com>
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* emultempl/cskyelf.em (csk_elf_before_parse): New function,
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setting use_branch_stub false for linux.
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(csky_elf_create_output_section_statements): Do emit this
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function and all others in the file for linux, plus the branch
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option control. Disable branch stubs when non-ELF.
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2019-04-10 Alan Modra <amodra@gmail.com>
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* Makefile.am (eskyelf.c, eskyelf_linux.c): Depend on cskyelf.em.
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@ -116,25 +116,32 @@ EOF
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case ${target} in
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csky-*-linux-*)
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fragment <<EOF
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/* This is a convenient point to tell BFD about target specific flags.
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After the output has been created, but before inputs are read. */
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static void
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csky_elf_create_output_section_statements (void)
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csky_elf_before_parse (void)
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{
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use_branch_stub = FALSE;
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gld${EMULATION_NAME}_before_parse ();
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}
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EOF
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;;
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*)
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esac
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fragment <<EOF
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/* This is a convenient point to tell BFD about target specific flags.
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After the output has been created, but before inputs are read. */
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static void
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csky_elf_create_output_section_statements (void)
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{
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if (!(bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour
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&& elf_object_id (link_info.output_bfd) == CSKY_ELF_DATA))
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use_branch_stub = FALSE;
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/* If don't use branch stub, just do not emit stub_file. */
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if (use_branch_stub == FALSE)
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if (!use_branch_stub)
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return;
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stub_file = lang_add_input_file ("linker stubs",
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lang_input_file_is_fake_enum, NULL);
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stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd);
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@ -150,11 +157,7 @@ csky_elf_create_output_section_statements (void)
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stub_file->the_bfd->flags |= BFD_LINKER_CREATED;
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ldlang_add_file (stub_file);
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}
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EOF
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;;
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esac
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fragment <<EOF
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/* Call-back for elf32_csky_size_stubs. */
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/* Create a new stub section, and arrange for it to be linked
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@ -304,11 +307,6 @@ EOF
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# This code gets inserted into the generic elf32.sc linker script
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# and allows us to define our own command line switches.
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case ${target} in
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csky-*-linux-*)
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;;
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*)
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PARSE_AND_LIST_PROLOGUE='
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#define OPTION_BRANCH_STUB 301
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#define OPTION_NO_BRANCH_STUB 302
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@ -347,9 +345,10 @@ PARSE_AND_LIST_ARGS_CASES='
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}
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break;
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'
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;;
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esac
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case ${target} in
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csky-*-linux-*) LDEMUL_BEFORE_PARSE=csky_elf_before_parse ;;
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esac
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LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
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LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=csky_elf_create_output_section_statements
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LDEMUL_FINISH=gld${EMULATION_NAME}_finish
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