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Check for changed section attributes.

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This commit is contained in:
Alan Modra 2000-04-20 01:43:32 +00:00
parent b209c575e3
commit 742f45cf3a
2 changed files with 60 additions and 37 deletions
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5
gas/ChangeLog
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@ -1,5 +1,8 @@
2000-04-19 Alan Modra <alan@linuxcare.com.au>
* config/obj-elf.c (obj_elf_change_section): Check for changed
section attributes.
* Makefile.am: (CPU_MULTI_VALID): Remove.
(MULTI_CPU_TYPES): Define.
(MULTI_CPU_OBJ_VALID): Define.
@ -11,7 +14,7 @@
2000-04-19 Michael Sokolov <msokolov@ivan.Harhan.ORG>
* Makefile.am (FLEX, LEX): Get them from configure.
* Makefile.am (YACC, LEX): Get them from configure.
2000-04-18 H.J. Lu (hjl@gnu.org)

92
gas/config/obj-elf.c
View file

@ -617,8 +617,10 @@ obj_elf_change_section (name, type, attr, push)
char *name;
int type, attr, push;
{
int new_sec;
asection *old_sec;
segT sec;
flagword flags;
int i;
#ifdef md_flush_pending_output
md_flush_pending_output ();
@ -639,49 +641,57 @@ obj_elf_change_section (name, type, attr, push)
previous_section = now_seg;
previous_subsection = now_subseg;
new_sec = bfd_get_section_by_name (stdoutput, name) == NULL;
old_sec = bfd_get_section_by_name (stdoutput, name);
sec = subseg_new (name, 0);
if (new_sec)
{
flagword flags;
symbolS *secsym;
int i;
/* See if this is one of the special sections. */
for (i = 0; special_sections[i].name != NULL; i++)
if (strcmp (name, special_sections[i].name) == 0)
{
if (type == SHT_NULL)
type = special_sections[i].type;
else if (type != special_sections[i].type)
as_warn (_("Setting incorrect section type for %s"), name);
if ((attr &~ special_sections[i].attributes) != 0)
/* See if this is one of the special sections. */
for (i = 0; special_sections[i].name != NULL; i++)
if (strcmp (name, special_sections[i].name) == 0)
{
if (type == SHT_NULL)
type = special_sections[i].type;
else if (type != special_sections[i].type)
{
if (old_sec == NULL)
{
/* As a GNU extension, we permit a .note section to be
allocatable. If the linker sees an allocateable .note
section, it will create a PT_NOTE segment in the output
file. */
if (strcmp (name, ".note") != 0
|| attr != SHF_ALLOC)
as_warn (_("Setting incorrect section attributes for %s"),
name);
as_warn (_("Setting incorrect section type for %s"), name);
}
else
{
as_warn (_("Ignoring incorrect section type for %s"), name);
type = special_sections[i].type;
}
attr |= special_sections[i].attributes;
break;
}
if ((attr &~ special_sections[i].attributes) != 0
&& old_sec == NULL)
{
/* As a GNU extension, we permit a .note section to be
allocatable. If the linker sees an allocateable .note
section, it will create a PT_NOTE segment in the output
file. */
if (strcmp (name, ".note") != 0
|| attr != SHF_ALLOC)
as_warn (_("Setting incorrect section attributes for %s"),
name);
}
attr |= special_sections[i].attributes;
break;
}
/* Convert ELF type and flags to BFD flags. */
flags = (SEC_RELOC
| ((attr & SHF_WRITE) ? 0 : SEC_READONLY)
| ((attr & SHF_ALLOC) ? SEC_ALLOC : 0)
| (((attr & SHF_ALLOC) && type != SHT_NOBITS) ? SEC_LOAD : 0)
| ((attr & SHF_EXECINSTR) ? SEC_CODE : 0));
/* Convert ELF type and flags to BFD flags. */
flags = (SEC_RELOC
| ((attr & SHF_WRITE) ? 0 : SEC_READONLY)
| ((attr & SHF_ALLOC) ? SEC_ALLOC : 0)
| (((attr & SHF_ALLOC) && type != SHT_NOBITS) ? SEC_LOAD : 0)
| ((attr & SHF_EXECINSTR) ? SEC_CODE : 0));
#ifdef md_elf_section_flags
flags = md_elf_section_flags (flags, attr, type);
flags = md_elf_section_flags (flags, attr, type);
#endif
if (old_sec == NULL)
{
symbolS *secsym;
/* Prevent SEC_HAS_CONTENTS from being inadvertently set. */
if (type == SHT_NOBITS)
seg_info (sec)->bss = 1;
@ -695,9 +705,19 @@ obj_elf_change_section (name, type, attr, push)
else
symbol_table_insert (section_symbol (sec));
}
else if (attr != 0)
{
/* If section attributes are specified the second time we see a
particular section, then check that they are the same as we
saw the first time. */
if ((old_sec->flags ^ flags)
& (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
| SEC_EXCLUDE | SEC_SORT_ENTRIES))
as_warn (_("Ignoring changed section attributes for %s"), name);
}
#ifdef md_elf_section_change_hook
md_elf_section_change_hook ();
md_elf_section_change_hook ();
#endif
}