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* elf.c (assign_file_positions_for_segments): Split into..

Browse Source 
(assign_file_positions_for_load_sections): ..this, and..
	(assign_file_positions_for_non_load_sections): ..this new function,..
	(assign_file_positions_except_relocs): ..writing program headers here.
This commit is contained in:
Alan Modra 2006-05-17 05:09:24 +00:00
parent dea5f36af5
commit f3520d2f1d
2 changed files with 94 additions and 54 deletions
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7
bfd/ChangeLog
View File

@ -1,3 +1,10 @@
2006-05-17 Alan Modra <amodra@bigpond.net.au>
* elf.c (assign_file_positions_for_segments): Split into..
(assign_file_positions_for_load_sections): ..this, and..
(assign_file_positions_for_non_load_sections): ..this new function,..
(assign_file_positions_except_relocs): ..writing program headers here.
2006-05-17 Alan Modra <amodra@bigpond.net.au>
* elflink.c (elf_gc_sweep): Don't specially keep non-alloc,

141
bfd/elf.c
View File

@ -4106,24 +4106,20 @@ print_segment_map (bfd *abfd)
/* Assign file positions to the sections based on the mapping from
sections to segments. This function also sets up some fields in
the file header, and writes out the program headers. */
the file header. */
static bfd_boolean
assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
assign_file_positions_for_load_sections (bfd *abfd,
struct bfd_link_info *link_info)
{
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
unsigned int count;
struct elf_segment_map *m;
unsigned int alloc;
Elf_Internal_Phdr *phdrs;
file_ptr off, voff;
bfd_vma filehdr_vaddr, filehdr_paddr;
bfd_vma phdrs_vaddr, phdrs_paddr;
Elf_Internal_Phdr *p;
Elf_Internal_Shdr **i_shdrpp;
Elf_Internal_Shdr **hdrpp;
file_ptr off, voff;
unsigned int count;
unsigned int alloc;
unsigned int i;
unsigned int num_sec;
if (elf_tdata (abfd)->segment_map == NULL)
{
@ -4196,20 +4192,19 @@ assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
}
if (alloc == 0)
alloc = count;
{
alloc = count;
elf_tdata (abfd)->program_header_size = alloc * bed->s->sizeof_phdr;
}
phdrs = bfd_alloc2 (abfd, alloc, sizeof (Elf_Internal_Phdr));
elf_tdata (abfd)->phdr = phdrs;
if (phdrs == NULL)
return FALSE;
off = bed->s->sizeof_ehdr;
off += alloc * bed->s->sizeof_phdr;
filehdr_vaddr = 0;
filehdr_paddr = 0;
phdrs_vaddr = 0;
phdrs_paddr = 0;
for (m = elf_tdata (abfd)->segment_map, p = phdrs;
m != NULL;
m = m->next, p++)
@ -4345,11 +4340,6 @@ assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
if (! m->p_paddr_valid)
p->p_paddr -= off;
}
if (p->p_type == PT_LOAD)
{
filehdr_vaddr = p->p_vaddr;
filehdr_paddr = p->p_paddr;
}
}
if (m->includes_phdrs)
@ -4357,15 +4347,7 @@ assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
if (! m->p_flags_valid)
p->p_flags |= PF_R;
if (m->includes_filehdr)
{
if (p->p_type == PT_LOAD)
{
phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
}
}
else
if (!m->includes_filehdr)
{
p->p_offset = bed->s->sizeof_ehdr;
@ -4376,14 +4358,6 @@ assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
if (! m->p_paddr_valid)
p->p_paddr -= off - p->p_offset;
}
if (p->p_type == PT_LOAD)
{
phdrs_vaddr = p->p_vaddr;
phdrs_paddr = p->p_paddr;
}
else
phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
}
p->p_filesz += alloc * bed->s->sizeof_phdr;
@ -4538,9 +4512,39 @@ assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
}
}
/* Assign file positions for the other sections. */
/* Clear out any program headers we allocated but did not use. */
for (; count < alloc; count++, p++)
{
memset (p, 0, sizeof *p);
p->p_type = PT_NULL;
}
elf_tdata (abfd)->next_file_pos = off;
return TRUE;
}
/* Assign file positions for the other sections. */
static bfd_boolean
assign_file_positions_for_non_load_sections (bfd *abfd,
struct bfd_link_info *link_info)
{
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
Elf_Internal_Shdr **i_shdrpp;
Elf_Internal_Shdr **hdrpp;
Elf_Internal_Phdr *phdrs;
Elf_Internal_Phdr *p;
struct elf_segment_map *m;
bfd_vma filehdr_vaddr, filehdr_paddr;
bfd_vma phdrs_vaddr, phdrs_paddr;
file_ptr off;
unsigned int num_sec;
unsigned int i;
unsigned int count;
i_shdrpp = elf_elfsections (abfd);
num_sec = elf_numsections (abfd);
off = elf_tdata (abfd)->next_file_pos;
for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
{
struct elf_obj_tdata *tdata = elf_tdata (abfd);
@ -4585,6 +4589,37 @@ assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
/* Now that we have set the section file positions, we can set up
the file positions for the non PT_LOAD segments. */
count = 0;
filehdr_vaddr = 0;
filehdr_paddr = 0;
phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
phdrs_paddr = 0;
phdrs = elf_tdata (abfd)->phdr;
for (m = elf_tdata (abfd)->segment_map, p = phdrs;
m != NULL;
m = m->next, p++)
{
++count;
if (p->p_type != PT_LOAD)
continue;
if (m->includes_filehdr)
{
filehdr_vaddr = p->p_vaddr;
filehdr_paddr = p->p_paddr;
}
if (m->includes_phdrs)
{
phdrs_vaddr = p->p_vaddr;
phdrs_paddr = p->p_paddr;
if (m->includes_filehdr)
{
phdrs_vaddr += bed->s->sizeof_ehdr;
phdrs_paddr += bed->s->sizeof_ehdr;
}
}
}
for (m = elf_tdata (abfd)->segment_map, p = phdrs;
m != NULL;
m = m->next, p++)
@ -4657,22 +4692,8 @@ assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
}
}
/* Clear out any program headers we allocated but did not use. */
for (; count < alloc; count++, p++)
{
memset (p, 0, sizeof *p);
p->p_type = PT_NULL;
}
elf_tdata (abfd)->phdr = phdrs;
elf_tdata (abfd)->next_file_pos = off;
/* Write out the program headers. */
if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
|| bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
return FALSE;
return TRUE;
}
@ -4844,9 +4865,21 @@ assign_file_positions_except_relocs (bfd *abfd,
}
else
{
unsigned int alloc;
/* Assign file positions for the loaded sections based on the
assignment of sections to segments. */
if (! assign_file_positions_for_segments (abfd, link_info))
if (!assign_file_positions_for_load_sections (abfd, link_info))
return FALSE;
/* And for non-load sections. */
if (!assign_file_positions_for_non_load_sections (abfd, link_info))
return FALSE;
/* Write out the program headers. */
alloc = tdata->program_header_size / bed->s->sizeof_phdr;
if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
|| bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
return FALSE;
off = tdata->next_file_pos;