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Segfault on phdrs allocated but not created

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A number of ARM tests show results like:
ld-new: no address assigned to the veneers output section .gnu.sgstubs
ld-new: can not size stub section: invalid operation
ld-new: warning: cannot find entry symbol _start; defaulting to 0000000000010074
ld-new: tmpdir/cmse-veneers-no-gnu_sgstubs: warning: allocated section `.text' not in segment
Segmentation fault
PASS: Secure gateway veneers: no .gnu.sgstubs section

The PASS despite the segv shows the danger of using "#..." to match
error output.  This patch doesn't try to fix the testuite, but does
prevent the segfault.

	* elf.c (assign_file_positions_except_relocs): Don't segfault
	when actual number of phdrs is less than allocated.  Delete
	outdated comment.  Formatting.
This commit is contained in:
Alan Modra
2018-02-26 08:16:24 +10:30
parent df5f2391f7
commit 6838f2bed6
2 changed files with 11 additions and 7 deletions
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6
bfd/ChangeLog
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@ -1,3 +1,9 @@
2018-02-26 Alan Modra <amodra@gmail.com>
* elf.c (assign_file_positions_except_relocs): Don't segfault
when actual number of phdrs is less than allocated. Delete
outdated comment. Formatting.
2018-02-26 Alan Modra <amodra@gmail.com> 2018-02-26 Alan Modra <amodra@gmail.com>
* elf-m10300.c, * elf-s390-common.c, * elf32-arc.c, * elf32-cris.c, * elf-m10300.c, * elf-s390-common.c, * elf32-arc.c, * elf32-cris.c,

12
bfd/elf.c
View File

@ -6127,9 +6127,7 @@ assign_file_positions_except_relocs (bfd *abfd,
} }
/* Write out the program headers. */ /* Write out the program headers. */
alloc = elf_program_header_size (abfd) / bed->s->sizeof_phdr; alloc = elf_elfheader (abfd)->e_phnum;
/* Sort the program headers into the ordering required by the ELF standard. */
if (alloc == 0) if (alloc == 0)
return TRUE; return TRUE;
@ -6151,14 +6149,14 @@ assign_file_positions_except_relocs (bfd *abfd,
alloc)) alloc))
&& tdata->phdr[1].p_type == PT_LOAD && tdata->phdr[1].p_type == PT_LOAD
&& (tdata->phdr[1].p_vaddr > tdata->phdr[0].p_vaddr && (tdata->phdr[1].p_vaddr > tdata->phdr[0].p_vaddr
|| (tdata->phdr[1].p_vaddr + tdata->phdr[1].p_memsz) || (tdata->phdr[1].p_vaddr + tdata->phdr[1].p_memsz
< (tdata->phdr[0].p_vaddr + tdata->phdr[0].p_memsz))) < tdata->phdr[0].p_vaddr + tdata->phdr[0].p_memsz)))
{ {
/* The fix for this error is usually to edit the linker script being /* The fix for this error is usually to edit the linker script being
used and set up the program headers manually. Either that or used and set up the program headers manually. Either that or
leave room for the headers at the start of the SECTIONS. */ leave room for the headers at the start of the SECTIONS. */
_bfd_error_handler (_("\ _bfd_error_handler (_("%pB: error: PHDR segment not covered"
%pB: error: PHDR segment not covered by LOAD segment"), " by LOAD segment"),
abfd); abfd);
return FALSE; return FALSE;
} }