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| author | Roland McGrath <roland@gnu.org> | 2012-11-21 20:13:04 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 2012-11-21 20:13:04 +0000 |
| commit | a3f548ed8589b815eb5141825c73d3871d0d1786 (patch) | |
| tree | 6c3e35f8939b910f5775fc73c46456eeffde0da0 /bfd/elf-nacl.c | |
| parent | 4724d37ec271a50c31dbebb13c424881b057e8d5 (diff) | |
| download | binutils-gdb-a3f548ed8589b815eb5141825c73d3871d0d1786.tar.gz | |
bfd/
* elf-nacl.c (segment_nonexecutable_and_has_contents): Renamed to ...
(segment_eligible_for_headers): ... this. Take new arguments
MAXPAGESIZE and SIZEOF_HEADERS. Return false if the first section's
start address doesn't leave space for the headers.
(nacl_modify_segment_map): Update caller.
Diffstat (limited to 'bfd/elf-nacl.c')
| -rw-r--r-- | bfd/elf-nacl.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/bfd/elf-nacl.c b/bfd/elf-nacl.c index 842e367d97d..04659e7fb18 100644 --- a/bfd/elf-nacl.c +++ b/bfd/elf-nacl.c @@ -42,11 +42,18 @@ segment_executable (struct elf_segment_map *seg) return FALSE; } +/* Determine if this segment is eligible to receive the file and program + headers. It must be non-executable and have contents. Its first + section must start far enough past the page boundary to allow space + for the headers. */ static bfd_boolean -segment_nonexecutable_and_has_contents (struct elf_segment_map *seg) +segment_eligible_for_headers (struct elf_segment_map *seg, + bfd_vma maxpagesize, bfd_vma sizeof_headers) { bfd_boolean any_contents = FALSE; unsigned int i; + if (seg->count == 0 || seg->sections[0]->lma % maxpagesize < sizeof_headers) + return FALSE; for (i = 0; i < seg->count; ++i) { if (seg->sections[i]->flags & SEC_CODE) @@ -68,6 +75,8 @@ nacl_modify_segment_map (bfd *abfd, struct bfd_link_info *info) struct elf_segment_map **first_load = NULL; struct elf_segment_map **last_load = NULL; bfd_boolean moved_headers = FALSE; + int sizeof_headers = bfd_sizeof_headers (abfd, info); + bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize; if (info != NULL && info->user_phdrs) /* The linker script used PHDRS explicitly, so don't change what the @@ -93,7 +102,8 @@ nacl_modify_segment_map (bfd *abfd, struct bfd_link_info *info) /* Now that we've noted the first PT_LOAD, we're looking for the first non-executable PT_LOAD with a nonempty p_filesz. */ else if (!moved_headers - && segment_nonexecutable_and_has_contents (seg)) + && segment_eligible_for_headers (seg, maxpagesize, + sizeof_headers)) { /* This is the one we were looking for! |