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9 Commits

Author SHA1 Message Date
Alan Modra
2edab91c10 Make assignments to dot keep an empty output section. 
An assignment to dot in an output section that allocates space of
course keeps the output section.  Here, I'm changing the behaviour for
assignments that don't allocate space.  The idea is not so much to
allow people to force output of an empty section with ". = .", but
to fix cases where an otherwise empty section has padding added by an
alignment expression that changes with relaxation or .eh_frame
editing.  Such a section might have zero size before relaxation and so
be stripped incorrectly.

ld/
	* ld.texinfo (Output Section Discarding): Mention assigning to dot
	as a way of keeping otherwise empty sections.
	* ldexp.c (is_dot, is_value, is_sym_value, is_dot_ne_0,
	is_dot_plus_0, is_align_conditional): New predicates.
	(exp_fold_tree_1): Set SEC_KEEP when assigning to dot inside an
	output section, except for some special cases.
	* scripttempl/elfmicroblaze.sc: Use canonical form to align at
	end of .heap and .stack.
ld/testsuite/
	* ld-shared/elf-offset.ld: Align end of .bss with canonical form
	of ALIGN that allows an empty .bss to be removed.
	* ld-arm/arm-dyn.ld: Likewise.
	* ld-arm/arm-lib.ld: Likewise.
	* ld-elfvsb/elf-offset.ld: Likewise.
	* ld-mips-elf/mips-dyn.ld: Likewise.
	* ld-mips-elf/mips-lib.ld: Likewise.
	* ld-arm/arm-no-rel-plt.ld: Remove duplicate ALIGN.
	* ld-powerpc/vle-multiseg-1.ld: Remove ALIGN at start of section.
	ALIGN address of section instead.
	* ld-powerpc/vle-multiseg-2.ld: Likewise.
	* ld-powerpc/vle-multiseg-3.ld: Likewise.
	* ld-powerpc/vle-multiseg-4.ld: Likewise.
	* ld-powerpc/vle-multiseg-6.ld: Likewise.
	* ld-scripts/empty-aligned.d: Check section headers not program
	headers.  Remove xfail and notarget.
	* ld-scripts/empty-aligned.t: Use canonical ALIGN for end of .text2.
 2014-01-22 11:58:29 +10:30
Alan Modra
c38b984508 * ld-scripts/empty-aligned.d: Revert last change. Allow more 
than one header, just not two PT_LOAD.
	* ld-elf/stack.s: Use .long 0 rather than nops.
 2012-10-24 23:22:48 +00:00
Nathan Sidwell
04c3a75556 bfd/ 
* bfd-in.h (bfd_elf_stack_segment_size): Declare.
	* bfd-in2.h: Rebuilt.
	* elfxx-target.h (elf_backend_stack_align): New.
	(elfNN_bed): Add it.
	* elf-bfd.h (struct elf_backend_data): Add stack_align field.
	* elf.c (bfd_elf_map_sections_to_segments): Pay attention to
	stack_align and stacksize for PT_GNU_STACK segment.
	(assign_file_positions_for_non_load_sections): Set p_memsz for
	PT_GNU_STACK segment.
	(copy_elf_program_header): Copy PT_GNU_STACK size.
	* elflink.c (bfd_elf_stack_segment_size): New function, taken from
	uclinux backends.
	(bfd_elf_size_dynamic_sections): Determine
	PT_GNU_STACK requirements after calling backend.  Pay attention to
	stacksize.
	* elf32-bfin.c (elf32_bfinfdpic_always_size_sections): Call
	bfd_elf_stack_segment_size.
	(elf32_bfinfdpic_modify_program_headers): Delete.
	(elf32_bfingfdpic_copy_private_bfd_data): Don't copy PT_GNU_STACK
	here.
	(elf_backend_stack_align): Override.
	(elf_backend_modify_program_headers): Don't override.
	* elf32-frv.c (frvfdpic_always_size_sections): Call
	bfd_elf_stack_segment_size.
	(elf32_frvfdpic_modify_program_headers): Delete.
	(elf32_frvfdpic_copy_private_bfd_data): Don't copy PT_GNU_STACK
	here.
	(elf_backend_stack_align): Override.
	(elf_backend_modify_program_headers): Don't override.
	* elf32-lm32.c (lm32_elf_always_size_sections): Leave
	PT_GNU_STACK creation to underlying elf support.  Check
	__stacksize here for backwards compatibility, and set it if
	needed.
	(lm32_elf_modify_segment_map): Delete.
	(lm32_elf_modify_program_headers): Delete.
	(elf_backend_stack_align): Override.
	(elf_backend_modify_segment_map): Don't override.
	(elf_backend_modify_program_headers): Don't override.
	* elf32-sh.c (sh_elf_always_size_sections): Call
	bfd_elf_stack_segment_size.
	(sh_elf_modify_program_headers): Delete.
	(sh_elf_copy_private_data): Don't copy PT_GNU_STACK
	here.
	(elf_backend_stack_align): Override.
	(elf_backend_modify_program_headers): Don't override.
	* elf32-tic6x.c (elf32_tic6x_always_size_sections): Call
	bfd_elf_stack_segment_size.
	(elf32_tic6x_modify_program_headers): Delete.
	(elf32_tic6x_copy_private_data): Delete.
	(elf_backend_stack_align): Override.
	(bfd_elf32_bfd_copy_private_bfd_data): Don't override.
	(elf_backend_modify_program_headers): Don't override.

	include/
	* bfdlink.h (struct bfd_link_info): Add stacksize option.

	ld/
	* ld.texinfo (stack-size): New option.
	* emultempl/elf32.em: Add stack-size option.

	ld/testsuite/
	* ld-elf/binutils.exp: Add -z stack-size=0.
	* ld-elf/elf.exp: Add stack-exec and stack-size tests.
	* ld-elf/orphan-region.d: Add stack-size option. Remove xfail.
	* ld-elf/stack-exec.rd: New.
	* ld-elf/stack-size.rd: New.
	* ld-elf/stack.s: New.
	* ld-scripts/empty-aligned.d: Add stack-size option.
	* ld-sh/fdpic-stack-set.d: New.
	* ld-tic6x/shlib-1.rd: Remove __stacksize symbol.
	* ld-tic6x/shlib-1b.rd: Likewise.
	* ld-tic6x/shlib-1r.rd: Likewise.
	* ld-tic6x/shlib-1rb.rd: Likewise.
	* ld-tic6x/shlib-app-1.rd: Likewise.
	* ld-tic6x/shlib-app-1b.rd: Likewise.
	* ld-tic6x/shlib-app-1r.rd: Likewise.
	* ld-tic6x/shlib-app-1rb.rd: Likewise.
	* ld-tic6x/shlib-noindex.rd: Likewise.
	* ld-tic6x/static-app-1.rd: Likewise.
	* ld-tic6x/static-app-1b.rd: Likewise.
	* ld-tic6x/static-app-1r.rd: Likewise.
	* ld-tic6x/static-app-1rb.rd: Likewise.
 2012-10-23 09:33:56 +00:00
Alan Modra
53b0eb27a9 * ld-elf/sec64k.exp: For frv-linux use "aw" sections. 
* ld-elf/seg.d: Cater for GNU_STACK segment.
	* ld-elf/symbol1ref.s: Use data section.
	* ld-elf/symbol2ref.s: Likewise.
	* ld-scripts/empty-address-1.d: Don't run on frv-linux.
	* ld-scripts/empty-address-2a.d: Likewise.
	* ld-scripts/empty-address-2b.d: Likewise.
	* ld-scripts/empty-aligned.d: Likewise.
	* ld-elf/extract-symbol-1sym.d: Tolerate extra target supplied syms.
	* ld-scripts/sort_b_a-1.d: Likewise.
	* ld-scripts/sort_b_a.d: Likewise.
	* ld-scripts/sort_b_a_a-1.d: Likewise.
	* ld-scripts/sort_b_a_a-2.d: Likewise.
	* ld-scripts/sort_b_a_a-3.d: Likewise.
	* ld-scripts/sort_b_a_n-1.d: Likewise.
	* ld-scripts/sort_b_a_n-2.d: Likewise.
	* ld-scripts/sort_b_a_n-3.d: Likewise.
	* ld-scripts/sort_b_n-1.d: Likewise.
	* ld-scripts/sort_b_n.d: Likewise.
	* ld-scripts/sort_b_n_a-1.d: Likewise.
	* ld-scripts/sort_b_n_a-2.d: Likewise.
	* ld-scripts/sort_b_n_a-3.d: Likewise.
	* ld-scripts/sort_b_n_n-1.d: Likewise.
	* ld-scripts/sort_b_n_n-2.d: Likewise.
	* ld-scripts/sort_b_n_n-3.d: Likewise.
	* ld-scripts/sort_no-1.d: Likewise.
	* ld-scripts/sort_no-2.d: Likewise.
 2009-09-09 12:13:42 +00:00
Alan Modra
48733062ff * ld-d10v/default_layout.d: Adjust for section removal. 
* ld-elf/empty.s: Define "main".
	* ld-elf/frame.exp: Don't run for hppa64 and v850.
	* ld-elf/group1.d: xfail various targets.
	* ld-elf/merge.d: Likewise.
	* ld-elf/merge2.d: Likewise.
	* ld-elf/warn1.d: Likewise.
	* ld-scripts/defined2.d: Likewise.
	* ld-scripts/defined3.d: Likewise.
	* ld-scripts/empty-aligned.d: Likewise.
	* ld-scripts/size-2.d: Likewise.
	* ld-scripts/weak.exp: Likewise.
	* ld-selective/sel-dump.exp: Likewise.
	* ld-undefined/weak-undef.exp: Likewise.
 2005-08-18 07:51:08 +00:00
Alan Modra
8bf3b8c251 * ld-elf/empty.s: Define "start". 
* ld-elf/merge2.d: xfail arc-*-* and dlx-*-*.
	* ld-scripts/empty-aligned.s: No .data section.
	* ld-scripts/empty-aligned.t: Discard most sections.
	* ld-scripts/empty-aligned.d: Adjust.
 2005-08-15 14:08:58 +00:00
Alan Modra
bdd87c7744 * ld-scripts/empty-aligned.t: Adjust alignment expressions so 
that no .text? section is kept.  Also check setting vma and
	lma.
	* ld-scripts/empty-aligned.d: Update.
 2005-06-10 00:44:01 +00:00
Alan Modra
6e81d46e50 * ld-scripts/empty-aligned.d: Adjust. 2005-06-09 02:06:58 +00:00
H.J. Lu
75ff45898c bfd/ 
2005-05-17  H.J. Lu  <hongjiu.lu@intel.com>

	PR 797
	* elf32-i386.c (elf_i386_size_dynamic_sections): Also remove
	empty sdynbss section.
	* elf64-x86-64.c (elf64_x86_64_size_dynamic_sections): Likewise.

ld/

2005-05-17  H.J. Lu  <hongjiu.lu@intel.com>

	PR 797
	* ldexp.c (exp_fold_tree_1): Renamed from exp_fold_tree and
	take take a bfd_boolean, mark_used. Ignore assert failure if
	mark_used is TRUE.
	(exp_fold_tree) Call exp_fold_tree_1 with mark_used == FALSE.
	(exp_fold_tree_no_dot): Updated to take a bfd_boolean,
	mark_used and pass down.
	(fold_unary): Likewise.
	(fold_binary): Likewise.
	(fold_trinary): Likewise.
	(exp_binop): Add FALSE to call to exp_fold_tree_no_dot.
	(exp_trinop): Likewise.
	(exp_unop): Likewise.
	(exp_nameop): Likewise.
	(exp_get_vma): Likewise.
	(exp_get_fill): Likewise.
	(exp_get_abs_int): Likewise.
	(fold_name): Likewise. Set SEC_KEEP in output section flags.
	(exp_mark_used_section): New.

	* ldexp.h (exp_mark_used_section): New.

	* ldlang.c (lang_output_section_statement_lookup_1): Set the
	ignored field to FALSE.
	(lang_mark_used_section_1): New.
	(lang_mark_used_section): Call lang_mark_used_section_1.
	(strip_excluded_output_sections): Call lang_mark_used_section
	and check for unused sections.
	(lang_size_sections_1): Skip an output section if it should
	be ignored.
	(lang_do_assignments_1): Likewise.
	(lang_process): Don't call lang_mark_used_section here.

	* ldlang.h (lang_output_section_statement_type): Change
	all_input_readonly to bitfield. Add ignored.

ld/testsuite/

2005-05-17  H.J. Lu  <hongjiu.lu@intel.com>

	PR 797
	* empty-aligned.d: New file.
	* empty-aligned.exp: Likewise.
	* empty-aligned.s: Likewise.
	* empty-aligned.t: Likewise.
 2005-05-17 16:43:02 +00:00