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Add support for generating PLT lookups for the ColdFire.

This commit is contained in:
Nick Clifton 2005-03-18 17:20:33 +00:00
parent b294bdf8d0
commit 238d258f72
6 changed files with 108 additions and 28 deletions
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6
bfd/ChangeLog
View File

@ -1,3 +1,9 @@
2005-03-18 C Jaiprakash <cjaiprakash@noida.hcltech.com>
* elf32-m68k.c (elf_cfv4e_plt0_entry): plt entry for coldfire v4e.
(elf_m68k_adjust_dynamic_symbol,elf_m68k_finish_dynamic_symbol,
elf_m68k_finish_dynamic_sections): Use it.
2005-03-17 Paul Brook <paul@codesourcery.com>
Dan Jacobowitz <dan@codesourcery.com>
Mark Mitchell <mark@codesourcery.com>

116
bfd/elf32-m68k.c
View File

@ -217,6 +217,37 @@ static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] =
0, 0, 0, 0 /* replaced with offset to start of .plt. */
};
#define CFV4E_PLT_ENTRY_SIZE 24
#define CFV4E_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_CFV4E)
static const bfd_byte elf_cfv4e_plt0_entry[CFV4E_PLT_ENTRY_SIZE] =
{
0x20, 0x3c,
0, 0, 0, 0, /* Replaced with offset to .got + 4. */
0x2f, 0x3b, 0x08, 0xfa, /* move.l (%pc,addr),-(%sp) */
0x20, 0x3c,
0, 0, 0, 0, /* Replaced with offset to .got + 8. */
0x20, 0x7b, 0x08, 0x00, /* move.l (%pc,%d0:l), %a0 */
0x4e, 0xd0, /* jmp (%a0) */
0x4e, 0x71 /* nop */
};
/* Subsequent entries in a procedure linkage table look like this. */
static const bfd_byte elf_cfv4e_plt_entry[CFV4E_PLT_ENTRY_SIZE] =
{
0x20, 0x3c,
0, 0, 0, 0, /* Replaced with offset to symbol's .got entry. */
0x20, 0x7b, 0x08, 0x00, /* move.l (%pc,%d0:l), %a0 */
0x4e, 0xd0, /* jmp (%a0) */
0x2f, 0x3c, /* move.l #offset,-(%sp) */
0, 0, 0, 0, /* Replaced with offset into relocation table. */
0x60, 0xff, /* bra.l .plt */
0, 0, 0, 0 /* Replaced with offset to start of .plt. */
};
#define CPU32_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_CPU32)
#define PLT_CPU32_ENTRY_SIZE 24
@ -977,6 +1008,8 @@ elf_m68k_adjust_dynamic_symbol (info, h)
{
if (CPU32_FLAG (dynobj))
s->size += PLT_CPU32_ENTRY_SIZE;
else if (CFV4E_FLAG (dynobj))
s->size += CFV4E_PLT_ENTRY_SIZE;
else
s->size += PLT_ENTRY_SIZE;
}
@ -998,6 +1031,8 @@ elf_m68k_adjust_dynamic_symbol (info, h)
/* Make room for this entry. */
if (CPU32_FLAG (dynobj))
s->size += PLT_CPU32_ENTRY_SIZE;
else if (CFV4E_FLAG (dynobj))
s->size += CFV4E_PLT_ENTRY_SIZE;
else
s->size += PLT_ENTRY_SIZE;
@ -1787,17 +1822,19 @@ elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym)
corresponds to this symbol. This is the index of this symbol
in all the symbols for which we are making plt entries. The
first entry in the procedure linkage table is reserved. */
if ( CPU32_FLAG (output_bfd))
plt_index = h->plt.offset / PLT_CPU32_ENTRY_SIZE - 1;
if (CPU32_FLAG (output_bfd))
plt_index = (h->plt.offset / PLT_CPU32_ENTRY_SIZE) - 1;
else if (CFV4E_FLAG (output_bfd))
plt_index = (h->plt.offset / CFV4E_PLT_ENTRY_SIZE) - 1;
else
plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
plt_index = (h->plt.offset / PLT_ENTRY_SIZE) - 1;
/* Get the offset into the .got table of the entry that
corresponds to this function. Each .got entry is 4 bytes.
The first three are reserved. */
got_offset = (plt_index + 3) * 4;
if ( CPU32_FLAG (output_bfd))
if (CPU32_FLAG (output_bfd))
{
/* Fill in the entry in the procedure linkage table. */
memcpy (splt->contents + h->plt.offset, elf_cpu32_plt_entry,
@ -1806,6 +1843,14 @@ elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym)
plt_off2 = 12;
plt_off3 = 18;
}
else if (CFV4E_FLAG (output_bfd))
{
memcpy (splt->contents + h->plt.offset, elf_cfv4e_plt_entry,
CFV4E_PLT_ENTRY_SIZE);
plt_off1 = 2;
plt_off2 = 14;
plt_off3 = 20;
}
else
{
/* Fill in the entry in the procedure linkage table. */
@ -1818,11 +1863,12 @@ elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym)
/* The offset is relative to the first extension word. */
bfd_put_32 (output_bfd,
(sgot->output_section->vma
+ sgot->output_offset
+ got_offset
- (splt->output_section->vma
+ h->plt.offset + 2)),
sgot->output_section->vma
+ sgot->output_offset
+ got_offset
- (splt->output_section->vma
+ h->plt.offset
+ CFV4E_FLAG (output_bfd) ? 8 : 2),
splt->contents + h->plt.offset + plt_off1);
bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
@ -1835,7 +1881,7 @@ elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym)
(splt->output_section->vma
+ splt->output_offset
+ h->plt.offset
+ 8),
+ CFV4E_FLAG (output_bfd) ? 12 : 8),
sgot->contents + got_offset);
/* Fill in the entry in the .rela.plt section. */
@ -2013,23 +2059,23 @@ elf_m68k_finish_dynamic_sections (output_bfd, info)
/* Fill in the first entry in the procedure linkage table. */
if (splt->size > 0)
{
if (!CPU32_FLAG (output_bfd))
{
memcpy (splt->contents, elf_m68k_plt0_entry, PLT_ENTRY_SIZE);
bfd_put_32 (output_bfd,
(sgot->output_section->vma
+ sgot->output_offset + 4
- (splt->output_section->vma + 2)),
splt->contents + 4);
bfd_put_32 (output_bfd,
(sgot->output_section->vma
+ sgot->output_offset + 8
- (splt->output_section->vma + 10)),
splt->contents + 12);
elf_section_data (splt->output_section)->this_hdr.sh_entsize
= PLT_ENTRY_SIZE;
}
else /* cpu32 */
if (CFV4E_FLAG (output_bfd))
{
memcpy (splt->contents, elf_cfv4e_plt0_entry, CFV4E_PLT_ENTRY_SIZE);
bfd_put_32 (output_bfd,
(sgot->output_section->vma
+ sgot->output_offset + 4
- (splt->output_section->vma + 2)),
splt->contents + 2);
bfd_put_32 (output_bfd,
(sgot->output_section->vma
+ sgot->output_offset + 8
- (splt->output_section->vma + 10) - 8),
splt->contents + 12);
elf_section_data (splt->output_section)->this_hdr.sh_entsize
= CFV4E_PLT_ENTRY_SIZE;
}
else if (CPU32_FLAG (output_bfd))
{
memcpy (splt->contents, elf_cpu32_plt0_entry, PLT_CPU32_ENTRY_SIZE);
bfd_put_32 (output_bfd,
@ -2045,6 +2091,22 @@ elf_m68k_finish_dynamic_sections (output_bfd, info)
elf_section_data (splt->output_section)->this_hdr.sh_entsize
= PLT_CPU32_ENTRY_SIZE;
}
else
{
memcpy (splt->contents, elf_m68k_plt0_entry, PLT_ENTRY_SIZE);
bfd_put_32 (output_bfd,
(sgot->output_section->vma
+ sgot->output_offset + 4
- (splt->output_section->vma + 2)),
splt->contents + 4);
bfd_put_32 (output_bfd,
(sgot->output_section->vma
+ sgot->output_offset + 8
- (splt->output_section->vma + 10)),
splt->contents + 12);
elf_section_data (splt->output_section)->this_hdr.sh_entsize
= PLT_ENTRY_SIZE;
}
}
}

5
gas/ChangeLog
View File

@ -1,3 +1,8 @@
2005-03-18 C Jaiprakash <cjaiprakash@noida.hcltech.com>
* config/tc-m68k.c (m68k_elf_final_processing): Set file specific
flag for coldfire v4e.
2005-03-17 Bob Wilson <bob.wilson@acm.org>
* config/tc-xtensa.c (xg_apply_tentative_value): Rename to

2
gas/config/tc-m68k.c
View File

@ -7447,6 +7447,8 @@ void
m68k_elf_final_processing (void)
{
/* Set file-specific flags if this is a cpu32 processor. */
if (arch_coldfire_fpu (current_architecture))
elf_elfheader (stdoutput)->e_flags |= EF_CFV4E;
if (cpu_of_arch (current_architecture) & cpu32)
elf_elfheader (stdoutput)->e_flags |= EF_CPU32;
else if ((cpu_of_arch (current_architecture) & m68000up)

4
include/elf/ChangeLog
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@ -1,3 +1,7 @@
2005-03-18 C Jaipraash <cjaiprakash@noida.hcltech.com>
* m68k.h (EF_CFV4E): Define.
2005-03-17 Paul Brook <paul@codesourcery.com>
Dan Jacobowitz <dan@codesourcery.com>
Mark Mitchell <mark@codesourcery.com>

3
include/elf/m68k.h
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@ -1,5 +1,5 @@
/* MC68k ELF support for BFD.
Copyright 1998, 1999, 2000, 2002 Free Software Foundation, Inc.
Copyright 1998, 1999, 2000, 2002, 2005 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
@ -54,5 +54,6 @@ END_RELOC_NUMBERS (R_68K_max)
#define EF_CPU32 0x00810000
#define EF_M68000 0x01000000
#define EF_CFV4E 0x00008000
#endif