+2009-03-14 Richard Sandiford <r.sandiford@uk.ibm.com>
+
+ * coff-rs6000.c (xcoff_reloc_type_br): Make the branch absolute
+ if the target is absolute. Fix comment typo.
+ (xcoff_ppc_relocate_section): Remove FIXME.
+ * coff64-rs6000.c (xcoff64_reloc_type_br): Make the branch absolute
+ if the target is absolute.
+
2009-03-14 Richard Sandiford <r.sandiford@uk.ibm.com>
* xcofflink.c (xcoff_mark, xcoff_link_input_bfd): Don't copy
bfd_byte *contents;
{
struct xcoff_link_hash_entry *h;
+ bfd_vma section_offset;
if (0 > rel->r_symndx)
return FALSE;
h = obj_xcoff_sym_hashes (input_bfd)[rel->r_symndx];
+ section_offset = rel->r_vaddr - input_section->vma;
/* If we see an R_BR or R_RBR reloc which is jumping to global
linkage code, and it is followed by an appropriate cror nop
cror. */
if (NULL != h
&& bfd_link_hash_defined == h->root.type
- && rel->r_vaddr - input_section->vma + 8 <= input_section->size)
+ && section_offset + 8 <= input_section->size)
{
bfd_byte *pnext;
unsigned long next;
- pnext = contents + (rel->r_vaddr - input_section->vma) + 4;
+ pnext = contents + section_offset + 4;
next = bfd_get_32 (input_bfd, pnext);
/* The _ptrgl function is magic. It is used by the AIX
if (next == 0x4def7b82 /* cror 15,15,15 */
|| next == 0x4ffffb82 /* cror 31,31,31 */
|| next == 0x60000000) /* ori r0,r0,0 */
- bfd_put_32 (input_bfd, 0x80410014, pnext); /* lwz r1,20(r1) */
+ bfd_put_32 (input_bfd, 0x80410014, pnext); /* lwz r2,20(r1) */
}
else
{
- if (next == 0x80410014) /* lwz r1,20(r1) */
+ if (next == 0x80410014) /* lwz r2,20(r1) */
bfd_put_32 (input_bfd, 0x60000000, pnext); /* ori r0,r0,0 */
}
}
howto->complain_on_overflow = complain_overflow_dont;
}
- howto->pc_relative = TRUE;
+ /* The original PC-relative relocation is biased by -r_vaddr, so adding
+ the value below will give the absolute target address. */
+ *relocation = val + addend + rel->r_vaddr;
+
howto->src_mask &= ~3;
howto->dst_mask = howto->src_mask;
- /* A PC relative reloc includes the section address. */
- addend += input_section->vma;
-
- *relocation = val + addend;
- *relocation -= (input_section->output_section->vma
- + input_section->output_offset);
+ if (h != NULL
+ && h->root.type == bfd_link_hash_defined
+ && bfd_is_abs_section (h->root.u.def.section)
+ && section_offset + 4 <= input_section->size)
+ {
+ bfd_byte *ptr;
+ bfd_vma insn;
+
+ /* Turn the relative branch into an absolute one by setting the
+ AA bit. */
+ ptr = contents + section_offset;
+ insn = bfd_get_32 (input_bfd, ptr);
+ insn |= 2;
+ bfd_put_32 (input_bfd, insn, ptr);
+
+ /* Make the howto absolute too. */
+ howto->pc_relative = FALSE;
+ howto->complain_on_overflow = complain_overflow_bitfield;
+ }
+ else
+ {
+ /* Use a PC-relative howto and subtract the instruction's address
+ from the target address we calculated above. */
+ howto->pc_relative = TRUE;
+ *relocation -= (input_section->output_section->vma
+ + input_section->output_offset
+ + section_offset);
+ }
return TRUE;
}
R_RBR:
A relative branch which may be modified to become an
- absolute branch. FIXME: We don't implement this,
- although we should for symbols of storage mapping class
- XMC_XO.
+ absolute branch.
R_RL:
The PowerPC AIX ABI describes this as a load which may be
bfd_byte *contents;
{
struct xcoff_link_hash_entry *h;
+ bfd_vma section_offset;
if (0 > rel->r_symndx)
return FALSE;
h = obj_xcoff_sym_hashes (input_bfd)[rel->r_symndx];
+ section_offset = rel->r_vaddr - input_section->vma;
/* If we see an R_BR or R_RBR reloc which is jumping to global
linkage code, and it is followed by an appropriate cror nop
cror. */
if (NULL != h
&& bfd_link_hash_defined == h->root.type
- && rel->r_vaddr - input_section->vma + 8 <= input_section->size)
+ && section_offset + 8 <= input_section->size)
{
bfd_byte *pnext;
unsigned long next;
- pnext = contents + (rel->r_vaddr - input_section->vma) + 4;
+ pnext = contents + section_offset + 4;
next = bfd_get_32 (input_bfd, pnext);
/* The _ptrgl function is magic. It is used by the AIX compiler to call
howto->complain_on_overflow = complain_overflow_dont;
}
- howto->pc_relative = TRUE;
+ /* The original PC-relative relocation is biased by -r_vaddr, so adding
+ the value below will give the absolute target address. */
+ *relocation = val + addend + rel->r_vaddr;
+
howto->src_mask &= ~3;
howto->dst_mask = howto->src_mask;
- /* A PC relative reloc includes the section address. */
- addend += input_section->vma;
-
- *relocation = val + addend;
- *relocation -= (input_section->output_section->vma
- + input_section->output_offset);
+ if (h != NULL
+ && h->root.type == bfd_link_hash_defined
+ && bfd_is_abs_section (h->root.u.def.section)
+ && section_offset + 4 <= input_section->size)
+ {
+ bfd_byte *ptr;
+ bfd_vma insn;
+
+ /* Turn the relative branch into an absolute one by setting the
+ AA bit. */
+ ptr = contents + section_offset;
+ insn = bfd_get_32 (input_bfd, ptr);
+ insn |= 2;
+ bfd_put_32 (input_bfd, insn, ptr);
+
+ /* Make the howto absolute too. */
+ howto->pc_relative = FALSE;
+ howto->complain_on_overflow = complain_overflow_bitfield;
+ }
+ else
+ {
+ /* Use a PC-relative howto and subtract the instruction's address
+ from the target address we calculated above. */
+ howto->pc_relative = TRUE;
+ *relocation -= (input_section->output_section->vma
+ + input_section->output_offset
+ + section_offset);
+ }
return TRUE;
}
+2009-03-14 Richard Sandiford <r.sandiford@uk.ibm.com>
+
+ * ld-powerpc/aix-abs-branch-1.im, ld-powerpc/aix-abs-branch-1.ex,
+ ld-powerpc/aix-abs-branch-1.s,
+ ld-powerpc/aix-abs-branch-1.dd: New test.
+ * ld-powerpc/aix52.exp: Run it.
+
2009-03-14 Richard Sandiford <r.sandiford@uk.ibm.com>
* ld-powerpc/aix-abs-reloc-1.ex, ld-powerpc/aix-abs-reloc-1.im,
--- /dev/null
+
+.*
+
+
+Disassembly of section \.text:
+
+0*10000000 <foo>:
+ *10000000:.* bla * 144d000 <.*>
+ *10000004:.* l(wz|) * r1,80\(r1\)
+ *10000008:.* bla * 1451000 <.*>
+ *1000000c:.* (oril * r0,r0,0|nop)
+ *10000010:.* bla * 1452800 <.*>
+ *10000014:.* (oril * r0,r0,0|nop)
+ *10000018:.* bla * 1450000 <.*>
--- /dev/null
+bar 0x1450000
--- /dev/null
+ .globl foo
+ .csect foo[PR]
+foo:
+ bl bar - 0x3000
+ lwz 1,80(1)
+ bl bar + 0x1000
+ .ifeq size - 32
+ lwz 2,20(1)
+ .else
+ ld 2,40(1)
+ .endif
+ bl bar + 0x2800
+ nop
+ bl bar
}
set aix52tests {
+ {"Absolute branch test 1"
+ "-shared -bI:aix-abs-branch-1.im -bE:aix-abs-branch-1.ex"
+ "" {aix-abs-branch-1.s}
+ {{objdump {-dR} aix-abs-branch-1.dd}}
+ "aix-abs-branch-1.so"}
+
{"Relocations against absolute symbols 1"
"-shared -bI:aix-abs-reloc-1.im -bE:aix-abs-reloc-1.ex"
{} {aix-abs-reloc-1.s}
projects / deliverable / binutils-gdb.git / commitdiff
