espressif/binutils-gdb
1
0
Fork 0
mirror of https://github.com/espressif/binutils-gdb.git synced 2025-06-02 12:37:05 +08:00
Code Issues Packages Projects Releases Wiki Activity

binutils/

Browse Source 
* readelf.c (get_file_header): Only read the first section header if
	e_shoff is non-zero.

bfd/
	* elfcode.h (elf_object_p): Sanity check eh_shoff == 0 implies
	e_shnum == 0.
	Only read the first section header if e_shoff is non-zero.
	Don't consider e_shstrndx if there are no sections.
This commit is contained in:
Jakub Jelinek
2002-06-18 14:09:06 +00:00
parent cc22880b3e
commit 7ece0d85fd
4 changed files with 46 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
bfd/elfcode.h
View File

@ -624,6 +624,10 @@ elf_object_p (abfd)
if (i_ehdrp->e_shentsize != sizeof (x_shdr) && i_ehdrp->e_shnum != 0)
goto got_wrong_format_error;
/* Further sanity check. */
if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_shnum != 0)
goto got_wrong_format_error;
ebd = get_elf_backend_data (abfd);
/* Check that the ELF e_machine field matches what this particular
@ -677,25 +681,28 @@ elf_object_p (abfd)
/* Remember the entry point specified in the ELF file header. */
bfd_set_start_address (abfd, i_ehdrp->e_entry);
/* Seek to the section header table in the file. */
if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0)
goto got_no_match;
if (i_ehdrp->e_shoff != 0)
{
/* Seek to the section header table in the file. */
if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0)
goto got_no_match;
/* Read the first section header at index 0, and convert to internal
form. */
if (bfd_bread ((PTR) & x_shdr, (bfd_size_type) sizeof x_shdr, abfd)
!= sizeof (x_shdr))
goto got_no_match;
elf_swap_shdr_in (abfd, &x_shdr, &i_shdr);
/* Read the first section header at index 0, and convert to internal
form. */
if (bfd_bread ((PTR) & x_shdr, (bfd_size_type) sizeof x_shdr, abfd)
!= sizeof (x_shdr))
goto got_no_match;
elf_swap_shdr_in (abfd, &x_shdr, &i_shdr);
/* If the section count is zero, the actual count is in the first
section header. */
if (i_ehdrp->e_shnum == SHN_UNDEF)
i_ehdrp->e_shnum = i_shdr.sh_size;
/* If the section count is zero, the actual count is in the first
section header. */
if (i_ehdrp->e_shnum == SHN_UNDEF)
i_ehdrp->e_shnum = i_shdr.sh_size;
/* And similarly for the string table index. */
if (i_ehdrp->e_shstrndx == SHN_XINDEX)
i_ehdrp->e_shstrndx = i_shdr.sh_link;
/* And similarly for the string table index. */
if (i_ehdrp->e_shstrndx == SHN_XINDEX)
i_ehdrp->e_shstrndx = i_shdr.sh_link;
}
/* Allocate space for a copy of the section header table in
internal form. */
@ -751,7 +758,7 @@ elf_object_p (abfd)
}
}
if (i_ehdrp->e_shstrndx)
if (i_ehdrp->e_shstrndx && i_ehdrp->e_shoff)
{
if (! bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx))
goto got_no_match;
@ -789,7 +796,7 @@ elf_object_p (abfd)
bfd_section_from_shdr with it (since this particular strtab is
used to find all of the ELF section names.) */
if (i_ehdrp->e_shstrndx != 0)
if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff)
{
unsigned int num_sec;