diff options
| author | Alan Modra <amodra@gmail.com> | 2014-04-02 12:07:33 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2014-04-02 12:07:33 +1030 |
| commit | 5979d6b69b20a8355ea94b75fad97415fce4788c (patch) | |
| tree | 896462cf9849c42674901897808ad7c4108cd759 /bfd/elf-bfd.h | |
| parent | cf2a3e990524cb794c75e0493169736dee6a660c (diff) | |
| download | gdb-5979d6b69b20a8355ea94b75fad97415fce4788c.zip gdb-5979d6b69b20a8355ea94b75fad97415fce4788c.tar.gz gdb-5979d6b69b20a8355ea94b75fad97415fce4788c.tar.bz2 | |
Handle VDSO section headers past end of page
When a VDSO gets large enough that it doesn't entirely fit in one page,
but not so large that the part described by the program header exceeds
one page, then gdb/BFD doesn't read the section headers and symbol
table information. This patch cures that by passing the size of the
vdso to BFD, and fixes a number of other issues in the BFD code.
bfd/
* elfcode.h (bfd_from_remote_memory): Add "size" parameter.
Consolidate code handling possible section headers past end of
segment. Don't use p_align for page size guess, instead use
minpagesize. Take note of ld.so clearing section headers when
p_memsz > p_filesz. Handle file header specifying no section
headers. Handle zero p_align throughout. Default loadbase to
zero. Add comments. Rename contents_size to high_offset, and
make it a bfd_vma. Delete unnecessary bfd_set_error calls.
* bfd-in.h (bfd_elf_bfd_from_remote_memory): Update prototpe.
* elf-bfd.h (struct elf_backend_data <elf_backend_from_remote_memory>):
Likewise.
(_bfd_elf32_bfd_from_remote_memory): Likewise.
(_bfd_elf64_bfd_from_remote_memory): Likewise.
* elf.c (bfd_elf_bfd_from_remote_memory): Adjust.
* bfd-in2.h: Regnerate.
gdb/
* symfile-mem.c (symbol_file_add_from_memory): Add size parameter.
Pass to bfd_elf_bfd_from_remote_memory. Adjust all callers.
(struct symbol_file_add_from_memory_args): Add size field.
(find_vdso_size): New function.
(add_vsyscall_page): Attempt to find vdso size.
Diffstat (limited to 'bfd/elf-bfd.h')
| -rw-r--r-- | bfd/elf-bfd.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h index ee6e6cb..6d07303 100644 --- a/bfd/elf-bfd.h +++ b/bfd/elf-bfd.h @@ -1191,9 +1191,9 @@ struct elf_backend_data /* This function implements `bfd_elf_bfd_from_remote_memory'; see elf.c, elfcode.h. */ bfd *(*elf_backend_bfd_from_remote_memory) - (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, - int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr, - bfd_size_type len)); + (bfd *templ, bfd_vma ehdr_vma, size_t size, bfd_vma *loadbasep, + int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr, + bfd_size_type len)); /* This function is used by `_bfd_elf_get_synthetic_symtab'; see elf.c. */ @@ -2334,10 +2334,10 @@ extern char *elfcore_write_ppc_linux_prpsinfo32 (bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *); extern bfd *_bfd_elf32_bfd_from_remote_memory - (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, + (bfd *templ, bfd_vma ehdr_vma, size_t size, bfd_vma *loadbasep, int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type)); extern bfd *_bfd_elf64_bfd_from_remote_memory - (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, + (bfd *templ, bfd_vma ehdr_vma, size_t size, bfd_vma *loadbasep, int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type)); extern bfd_vma bfd_elf_obj_attr_size (bfd *); |