From 6838f2bed6459514c1b0c549e6aa3fc7dbb1d7ec Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Mon, 26 Feb 2018 08:16:24 +1030 Subject: [PATCH] Segfault on phdrs allocated but not created 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 Delete outdated comment.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. --- bfd/ChangeLog | 6 ++++++ bfd/elf.c | 12 +++++------- 2 files changed, 11 insertions(+), 7 deletions(-) diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 68527a31f01..15aa4ee174c 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,9 @@ +2018-02-26 Alan Modra + + * 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 Delete + outdated comment.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 * elf-m10300.c, * elf-s390-common.c, * elf32-arc.c, * elf32-cris.c, diff --git a/bfd/elf.c b/bfd/elf.c index 184ab31f413..5d39a9881d5 100644 --- a/bfd/elf.c +++ b/bfd/elf.c @@ -6127,9 +6127,7 @@ assign_file_positions_except_relocs (bfd *abfd, } /* Write out the program headers. */ - alloc = elf_program_header_size (abfd) / bed->s->sizeof_phdr; - - /* Sort the program headers into the ordering required by the ELF standard. */ + alloc = elf_elfheader (abfd)->e_phnum; if (alloc == 0) return TRUE; @@ -6151,14 +6149,14 @@ assign_file_positions_except_relocs (bfd *abfd, alloc)) && tdata->phdr[1].p_type == PT_LOAD && (tdata->phdr[1].p_vaddr > tdata->phdr[0].p_vaddr - || (tdata->phdr[1].p_vaddr + tdata->phdr[1].p_memsz) - < (tdata->phdr[0].p_vaddr + tdata->phdr[0].p_memsz))) + || (tdata->phdr[1].p_vaddr + tdata->phdr[1].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 used and set up the program headers manually. Either that or leave room for the headers at the start of the SECTIONS. */ - _bfd_error_handler (_("\ -%pB: error: PHDR segment not covered by LOAD segment"), + _bfd_error_handler (_("%pB: error: PHDR segment not covered" + " by LOAD segment"), abfd); return FALSE; } -- 2.30.2