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author | H.J. Lu <hjl.tools@gmail.com> | 2020-12-08 16:41:22 -0800 |
---|---|---|
committer | H.J. Lu <hjl.tools@gmail.com> | 2020-12-08 16:41:32 -0800 |
commit | 037311d1df303c91395cdfe07b6ab414de99e420 (patch) | |
tree | 2d60f4001e36f5e4b1445fa630e0098ce31b7a57 /gas/config/obj-elf.c | |
parent | dd235d453e8ee2f641cbafa4b7078a1407a50ec1 (diff) | |
download | fsf-binutils-gdb-037311d1df303c91395cdfe07b6ab414de99e420.zip fsf-binutils-gdb-037311d1df303c91395cdfe07b6ab414de99e420.tar.gz fsf-binutils-gdb-037311d1df303c91395cdfe07b6ab414de99e420.tar.bz2 |
gas: Generate a new section for SHF_GNU_RETAIN
For
.globl foo2
.section .data.foo,"aR"
.align 4
.type foo2, @object
.size foo2, 4
foo2:
.long 2
.globl foo1
.section .data.foo
.align 4
.type foo1, @object
.size foo1, 4
foo1:
.long 1
generate a new section if the SHF_GNU_RETAIN bit doesn't match.
* config/obj-elf.c (SEC_ASSEMBLER_SHF_MASK): New.
(get_section_by_match): Also check if SEC_ASSEMBLER_SHF_MASK of
sh_flags matches. Rename info to sh_info.
(obj_elf_change_section): Don't check previous SHF_GNU_RETAIN.
Rename info to sh_info.
(obj_elf_section): Rename info to sh_info. Set sh_flags for
SHF_GNU_RETAIN.
* config/obj-elf.h (elf_section_match): Rename info to sh_info.
Add sh_flags.
* testsuite/gas/elf/elf.exp: Run section27.
* testsuite/gas/elf/section24b.d: Updated.
* testsuite/gas/elf/section27.d: New file.
* testsuite/gas/elf/section27.s: Likewise.
Diffstat (limited to 'gas/config/obj-elf.c')
-rw-r--r-- | gas/config/obj-elf.c | 35 |
1 files changed, 18 insertions, 17 deletions
diff --git a/gas/config/obj-elf.c b/gas/config/obj-elf.c index 54d42d9..5d3b1a0 100644 --- a/gas/config/obj-elf.c +++ b/gas/config/obj-elf.c @@ -519,6 +519,9 @@ struct section_stack static struct section_stack *section_stack; +/* ELF section flags for unique sections. */ +#define SEC_ASSEMBLER_SHF_MASK SHF_GNU_RETAIN + /* Return TRUE iff SEC matches the section info INF. */ static bfd_boolean @@ -529,9 +532,12 @@ get_section_by_match (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf) const char *group_name = elf_group_name (sec); const char *linked_to_symbol_name = sec->map_head.linked_to_symbol_name; - unsigned int info = elf_section_data (sec)->this_hdr.sh_info; + unsigned int sh_info = elf_section_data (sec)->this_hdr.sh_info; + bfd_vma sh_flags = (elf_section_data (sec)->this_hdr.sh_flags + & SEC_ASSEMBLER_SHF_MASK); - return (info == match->info + return (sh_info == match->sh_info + && sh_flags == match->sh_flags && ((bfd_section_flags (sec) & SEC_ASSEMBLER_SECTION_ID) == (match->flags & SEC_ASSEMBLER_SECTION_ID)) && sec->section_id == match->section_id @@ -740,7 +746,7 @@ obj_elf_change_section (const char *name, type = bfd_elf_get_default_section_type (flags); elf_section_type (sec) = type; elf_section_flags (sec) = attr; - elf_section_data (sec)->this_hdr.sh_info = match_p->info; + elf_section_data (sec)->this_hdr.sh_info = match_p->sh_info; /* Prevent SEC_HAS_CONTENTS from being inadvertently set. */ if (type == SHT_NOBITS) @@ -806,17 +812,9 @@ obj_elf_change_section (const char *name, as_bad (_("changed section attributes for %s"), name); } else - { - /* Don't overwrite a previously set SHF_GNU_RETAIN flag for the - section. The entire section must be marked retained. */ - if ((elf_tdata (stdoutput)->has_gnu_osabi & elf_gnu_osabi_retain) - && ((elf_section_flags (old_sec) & SHF_GNU_RETAIN))) - attr |= SHF_GNU_RETAIN; - - /* FIXME: Maybe we should consider removing a previously set - processor or application specific attribute as suspicious ? */ - elf_section_flags (sec) = attr; - } + /* FIXME: Maybe we should consider removing a previously set + processor or application specific attribute as suspicious? */ + elf_section_flags (sec) = attr; if ((flags & SEC_MERGE) && old_sec->entsize != (unsigned) entsize) as_bad (_("changed section entity size for %s"), name); @@ -1322,18 +1320,21 @@ obj_elf_section (int push) if (ISDIGIT (* input_line_pointer)) { char *t = input_line_pointer; - match.info = strtoul (input_line_pointer, + match.sh_info = strtoul (input_line_pointer, &input_line_pointer, 0); - if (match.info == (unsigned int) -1) + if (match.sh_info == (unsigned int) -1) { as_warn (_("unsupported mbind section info: %s"), t); - match.info = 0; + match.sh_info = 0; } } else input_line_pointer = save; } + if ((gnu_attr & SHF_GNU_RETAIN) != 0) + match.sh_flags |= SHF_GNU_RETAIN; + if (*input_line_pointer == ',') { char *save = input_line_pointer; |