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gas: error for section type, attr, or entsize change

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* config/obj-elf.c (obj_elf_change_section): Error for section
	type, attr or entsize changes in assembly.
	* testsuite/gas/elf/elf.exp: Pass -Z to gas for section5 test.
	* testsuite/gas/elf/section5.l: Update.
This commit is contained in:
Alan Modra
2020-02-07 00:42:45 +10:30
parent 821948744f
commit 33176d912a
4 changed files with 31 additions and 8 deletions
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21
gas/config/obj-elf.c
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@ -767,7 +767,17 @@ obj_elf_change_section (const char *name,
{
if (type != SHT_NULL
&& (unsigned) type != elf_section_type (old_sec))
as_warn (_("ignoring changed section type for %s"), name);
{
if (ssect != NULL)
/* This is a special section with known type. User
assembly might get the section type wrong; Even high
profile projects like glibc have done so in the past.
So don't error in this case. */
as_warn (_("ignoring changed section type for %s"), name);
else
/* Do error when assembly isn't self-consistent. */
as_bad (_("changed section type for %s"), name);
}
if (attr != 0)
{
@ -779,14 +789,19 @@ obj_elf_change_section (const char *name,
| SEC_EXCLUDE | SEC_SORT_ENTRIES | SEC_MERGE | SEC_STRINGS
| SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD
| SEC_THREAD_LOCAL)))
as_warn (_("ignoring changed section attributes for %s"), name);
{
if (ssect != NULL)
as_warn (_("ignoring changed section attributes for %s"), name);
else
as_bad (_("changed section attributes for %s"), name);
}
else
/* 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_warn (_("ignoring changed section entity size for %s"), name);
as_bad (_("changed section entity size for %s"), name);
}
}