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| author | Alan Modra <amodra@gmail.com> | 2014-01-22 11:43:03 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2014-01-22 11:58:29 +1030 |
| commit | 2edab91c10dcae30a93ce7d9f8088b8b33ee55eb (patch) | |
| tree | 883bbadffed39aea4c78262946e12a35660b5bbe /ld/testsuite/ld-scripts | |
| parent | 4584ec12076e088cf36965b88ef8710ca85491f9 (diff) | |
| download | gdb-2edab91c10dcae30a93ce7d9f8088b8b33ee55eb.zip gdb-2edab91c10dcae30a93ce7d9f8088b8b33ee55eb.tar.gz gdb-2edab91c10dcae30a93ce7d9f8088b8b33ee55eb.tar.bz2 | |
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.
Diffstat (limited to 'ld/testsuite/ld-scripts')
| -rw-r--r-- | ld/testsuite/ld-scripts/empty-aligned.d | 14 | ||||
| -rw-r--r-- | ld/testsuite/ld-scripts/empty-aligned.t | 8 |
2 files changed, 8 insertions, 14 deletions
diff --git a/ld/testsuite/ld-scripts/empty-aligned.d b/ld/testsuite/ld-scripts/empty-aligned.d index d9916dd..ff131eb 100644 --- a/ld/testsuite/ld-scripts/empty-aligned.d +++ b/ld/testsuite/ld-scripts/empty-aligned.d @@ -1,14 +1,8 @@ #source: empty-aligned.s #ld: -T empty-aligned.t -#readelf: -l --wide -#xfail: "hppa64-*-*" -#notarget: frv-*-*linux* +#readelf: -S --wide #... -Program Headers: - +Type +Offset +VirtAddr +PhysAddr +FileSiz +MemSiz +Flg +Align - +LOAD +0x[0-9a-f]+ 0x[0-9a-f]+ 0x[0-9a-f]+ 0x[0-9a-f]+ 0x[0-9a-f]+ [RWE ]+ +0x[0-9a-f]+ -! +LOAD .* -#... - +Segment Sections\.\.\. - +00 +.text +.* .text .* +!.* .text[234] .* +#pass diff --git a/ld/testsuite/ld-scripts/empty-aligned.t b/ld/testsuite/ld-scripts/empty-aligned.t index e59bc20..5f6a38d 100644 --- a/ld/testsuite/ld-scripts/empty-aligned.t +++ b/ld/testsuite/ld-scripts/empty-aligned.t @@ -6,14 +6,14 @@ SECTIONS { *(.text1) } - /* Same for alignment at beginning and end. */ + /* Same for alignment at beginning and end, although we need to be + careful in the expression used to align. */ .text2 ALIGN (4096) : { *(.text2) - . = ALIGN (4096); + . = ALIGN (. != 0 ? 4096 : 1); } - /* Same for alignment just at end, although we need to be careful in - the expression used to align. */ + /* Same for alignment just at end. */ .text3 : { *(.text3) |